From b513b1045111b565d91ccb29743ba6c43024941c Mon Sep 17 00:00:00 2001 From: ucwong Date: Thu, 14 Sep 2023 15:41:23 +0800 Subject: [PATCH] metrics usage --- consensus/cuckoo/cuckoo.go | 2 +- go.mod | 4 +- go.sum | 8 +- metrics/counter.go | 72 +-- metrics/counter_float64.go | 61 +-- metrics/counter_float_64_test.go | 16 +- metrics/counter_test.go | 14 +- metrics/doc.go | 4 - metrics/ewma.go | 91 ++-- metrics/ewma_test.go | 233 ++-------- metrics/exp/exp.go | 32 +- metrics/gauge.go | 116 ++--- metrics/gauge_float64.go | 80 +--- metrics/gauge_float64_test.go | 33 +- metrics/gauge_info.go | 88 +--- metrics/gauge_info_test.go | 49 +- metrics/gauge_test.go | 39 +- metrics/graphite.go | 10 +- metrics/histogram.go | 158 +------ metrics/histogram_test.go | 8 +- metrics/inactive.go | 48 ++ metrics/influxdb/influxdb.go | 21 +- metrics/influxdb/influxdb_test.go | 2 +- metrics/influxdb/testdata/influxdbv1.want | 4 +- metrics/influxdb/testdata/influxdbv2.want | 4 +- metrics/internal/sampledata.go | 33 +- metrics/internal/sampledata_test.go | 27 ++ metrics/librato/librato.go | 73 +-- metrics/log.go | 10 +- metrics/meter.go | 207 ++------- metrics/meter_test.go | 30 +- metrics/metrics.go | 6 + metrics/metrics_test.go | 4 +- metrics/opentsdb.go | 10 +- metrics/opentsdb_test.go | 15 + metrics/prometheus/collector.go | 25 +- metrics/prometheus/collector_test.go | 4 +- metrics/prometheus/testdata/prometheus.want | 28 +- metrics/registry.go | 8 +- metrics/registry_test.go | 4 +- metrics/resetting_sample.go | 2 +- metrics/resetting_timer.go | 204 +++------ metrics/resetting_timer_test.go | 101 ++-- metrics/runtimehistogram.go | 218 ++++----- metrics/runtimehistogram_test.go | 37 +- metrics/sample.go | 432 +++++------------- metrics/sample_test.go | 150 +++--- metrics/syslog.go | 10 +- metrics/testdata/opentsb.want | 2 +- metrics/timer.go | 214 ++------- metrics/timer_test.go | 10 +- metrics/writer.go | 10 +- .../github.com/anacrolix/torrent/.gitignore | 2 + vendor/github.com/anacrolix/torrent/config.go | 17 +- .../github.com/anacrolix/torrent/torrent.go | 2 +- vendor/modules.txt | 4 +- 56 files changed, 1053 insertions(+), 2043 deletions(-) delete mode 100644 metrics/doc.go create mode 100644 metrics/inactive.go create mode 100644 metrics/internal/sampledata_test.go diff --git a/consensus/cuckoo/cuckoo.go b/consensus/cuckoo/cuckoo.go index 898b5f305d..7a51ef3b0e 100644 --- a/consensus/cuckoo/cuckoo.go +++ b/consensus/cuckoo/cuckoo.go @@ -260,7 +260,7 @@ func (cuckoo *Cuckoo) Threads() int { } func (cuckoo *Cuckoo) Hashrate() float64 { - return cuckoo.hashrate.Rate1() + return cuckoo.hashrate.Snapshot().Rate1() } func (cuckoo *Cuckoo) APIs(chain consensus.ChainHeaderReader) []rpc.API { diff --git a/go.mod b/go.mod index c82d10a314..aff3d4b500 100644 --- a/go.mod +++ b/go.mod @@ -6,7 +6,7 @@ require ( github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v0.4.1 github.com/CortexFoundation/inference v1.0.2-0.20230307032835-9197d586a4e8 github.com/CortexFoundation/statik v0.0.0-20210315012922-8bb8a7b5dc66 - github.com/CortexFoundation/torrentfs v1.0.54-0.20230912084150-c5147dcb0ff7 + github.com/CortexFoundation/torrentfs v1.0.54-0.20230913182816-d7428d1e9e55 github.com/VictoriaMetrics/fastcache v1.12.1 github.com/arsham/figurine v1.3.0 github.com/aws/aws-sdk-go-v2 v1.19.0 @@ -101,7 +101,7 @@ require ( github.com/anacrolix/multiless v0.3.1-0.20221221005021-2d12701f83f7 // indirect github.com/anacrolix/stm v0.5.0 // indirect github.com/anacrolix/sync v0.4.0 // indirect - github.com/anacrolix/torrent v1.52.6-0.20230911001013-87f6cdc1e96f // indirect + github.com/anacrolix/torrent v1.52.6-0.20230913111536-bd2839cb9ca1 // indirect github.com/anacrolix/upnp v0.1.3-0.20220123035249-922794e51c96 // indirect github.com/anacrolix/utp v0.2.0 // indirect github.com/antlabs/stl v0.0.1 // indirect diff --git a/go.sum b/go.sum index 38e88a70eb..b693a486fe 100644 --- a/go.sum +++ b/go.sum @@ -67,8 +67,8 @@ github.com/CortexFoundation/statik v0.0.0-20210315012922-8bb8a7b5dc66/go.mod h1: github.com/CortexFoundation/torrentfs v1.0.13-0.20200623060705-ce027f43f2f8/go.mod h1:Ma+tGhPPvz4CEZHaqEJQMOEGOfHeQBiAoNd1zyc/w3Q= github.com/CortexFoundation/torrentfs v1.0.14-0.20200703071639-3fcabcabf274/go.mod h1:qnb3YlIJmuetVBtC6Lsejr0Xru+1DNmDCdTqnwy7lhk= github.com/CortexFoundation/torrentfs v1.0.20-0.20200810031954-d36d26f82fcc/go.mod h1:N5BsicP5ynjXIi/Npl/SRzlJ630n1PJV2sRj0Z0t2HA= -github.com/CortexFoundation/torrentfs v1.0.54-0.20230912084150-c5147dcb0ff7 h1:NC2s1+6W7ruIecukd0AVOQljBd3FqCopoRLPg9Z3XWY= -github.com/CortexFoundation/torrentfs v1.0.54-0.20230912084150-c5147dcb0ff7/go.mod h1:iB5u/7fThc4vLc51l0RCG7OOAOifsZvagwiLbLJpMmM= +github.com/CortexFoundation/torrentfs v1.0.54-0.20230913182816-d7428d1e9e55 h1:4/07+pA4e0L/aZjc4T+Nb8AwscefGI8MuigkLDbAqT0= +github.com/CortexFoundation/torrentfs v1.0.54-0.20230913182816-d7428d1e9e55/go.mod h1:Yt+umO4vwCdBhCrbu2Osemd0tsfgdrzv4mHLwn7n7Pw= github.com/CortexFoundation/wormhole v0.0.0-20230908085523-44aea02f16f8 h1:Cvtqm62iaQx0KBC2ZuEseIsuBh3v1BvIpcHvwIe4yq8= github.com/CortexFoundation/wormhole v0.0.0-20230908085523-44aea02f16f8/go.mod h1:62dTMtfdf0W71ZfM7xDFJTFdzMfaKeYUrx7fB5/iQ1s= github.com/DATA-DOG/go-sqlmock v1.3.3/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM= @@ -211,8 +211,8 @@ github.com/anacrolix/torrent v1.15.0/go.mod h1:MFc6KcbpAyfwGqOyRkdarUK9QnKA/FkVg github.com/anacrolix/torrent v1.15.1-0.20200504230043-cc5d2abe18e5/go.mod h1:QlOfgrCz5kbvhOz8M58dUwHY5SfZ9VbIvReZ0z0MdIk= github.com/anacrolix/torrent v1.15.1-0.20200619022403-dd51e99b88cc/go.mod h1:wuopQPC5+/M+zHYvhcA2vp5UCTm9rUc+VqjyBa882Q8= github.com/anacrolix/torrent v1.15.1-0.20200715061614-dd906f8fa72e/go.mod h1:XWo/fJN1oKgcjgxM+pUZpvalHfqHDs27BY5mBZjIQWo= -github.com/anacrolix/torrent v1.52.6-0.20230911001013-87f6cdc1e96f h1:KGyzNz+MiH/7gbEMz18x4I2YmWIF068qKIaZP/cfcuM= -github.com/anacrolix/torrent v1.52.6-0.20230911001013-87f6cdc1e96f/go.mod h1:U1BtbBNsjLeOGIukQaqXV5OqjOwkHaaWKFUThinxkE0= +github.com/anacrolix/torrent v1.52.6-0.20230913111536-bd2839cb9ca1 h1:t7IiL4GakRC5LQoBR9ZZdoFNOk85okJHrNv+gMx/AJs= +github.com/anacrolix/torrent v1.52.6-0.20230913111536-bd2839cb9ca1/go.mod h1:U1BtbBNsjLeOGIukQaqXV5OqjOwkHaaWKFUThinxkE0= github.com/anacrolix/upnp v0.1.1/go.mod h1:LXsbsp5h+WGN7YR+0A7iVXm5BL1LYryDev1zuJMWYQo= github.com/anacrolix/upnp v0.1.2-0.20200416075019-5e9378ed1425/go.mod h1:Pz94W3kl8rf+wxH3IbCa9Sq+DTJr8OSbV2Q3/y51vYs= github.com/anacrolix/upnp v0.1.3-0.20220123035249-922794e51c96 h1:QAVZ3pN/J4/UziniAhJR2OZ9Ox5kOY2053tBbbqUPYA= diff --git a/metrics/counter.go b/metrics/counter.go index 55e1c59540..cb81599c21 100644 --- a/metrics/counter.go +++ b/metrics/counter.go @@ -4,13 +4,16 @@ import ( "sync/atomic" ) +type CounterSnapshot interface { + Count() int64 +} + // Counters hold an int64 value that can be incremented and decremented. type Counter interface { Clear() - Count() int64 Dec(int64) Inc(int64) - Snapshot() Counter + Snapshot() CounterSnapshot } // GetOrRegisterCounter returns an existing Counter or constructs and registers @@ -38,13 +41,13 @@ func NewCounter() Counter { if !Enabled { return NilCounter{} } - return &StandardCounter{} + return new(StandardCounter) } // NewCounterForced constructs a new StandardCounter and returns it no matter if // the global switch is enabled or not. func NewCounterForced() Counter { - return &StandardCounter{} + return new(StandardCounter) } // NewRegisteredCounter constructs and registers a new StandardCounter. @@ -70,75 +73,40 @@ func NewRegisteredCounterForced(name string, r Registry) Counter { return c } -// CounterSnapshot is a read-only copy of another Counter. -type CounterSnapshot int64 - -// Clear panics. -func (CounterSnapshot) Clear() { - panic("Clear called on a CounterSnapshot") -} +// counterSnapshot is a read-only copy of another Counter. +type counterSnapshot int64 // Count returns the count at the time the snapshot was taken. -func (c CounterSnapshot) Count() int64 { return int64(c) } - -// Dec panics. -func (CounterSnapshot) Dec(int64) { - panic("Dec called on a CounterSnapshot") -} - -// Inc panics. -func (CounterSnapshot) Inc(int64) { - panic("Inc called on a CounterSnapshot") -} - -// Snapshot returns the snapshot. -func (c CounterSnapshot) Snapshot() Counter { return c } +func (c counterSnapshot) Count() int64 { return int64(c) } // NilCounter is a no-op Counter. type NilCounter struct{} -// Clear is a no-op. -func (NilCounter) Clear() {} - -// Count is a no-op. -func (NilCounter) Count() int64 { return 0 } - -// Dec is a no-op. -func (NilCounter) Dec(i int64) {} - -// Inc is a no-op. -func (NilCounter) Inc(i int64) {} - -// Snapshot is a no-op. -func (NilCounter) Snapshot() Counter { return NilCounter{} } +func (NilCounter) Clear() {} +func (NilCounter) Dec(i int64) {} +func (NilCounter) Inc(i int64) {} +func (NilCounter) Snapshot() CounterSnapshot { return (*emptySnapshot)(nil) } // StandardCounter is the standard implementation of a Counter and uses the // sync/atomic package to manage a single int64 value. -type StandardCounter struct { - count atomic.Int64 -} +type StandardCounter atomic.Int64 // Clear sets the counter to zero. func (c *StandardCounter) Clear() { - c.count.Store(0) -} - -// Count returns the current count. -func (c *StandardCounter) Count() int64 { - return c.count.Load() + (*atomic.Int64)(c).Store(0) } // Dec decrements the counter by the given amount. func (c *StandardCounter) Dec(i int64) { - c.count.Add(-i) + (*atomic.Int64)(c).Add(-i) } // Inc increments the counter by the given amount. func (c *StandardCounter) Inc(i int64) { - c.count.Add(i) + (*atomic.Int64)(c).Add(i) } // Snapshot returns a read-only copy of the counter. -func (c *StandardCounter) Snapshot() Counter { - return CounterSnapshot(c.Count()) +func (c *StandardCounter) Snapshot() CounterSnapshot { + return counterSnapshot((*atomic.Int64)(c).Load()) } diff --git a/metrics/counter_float64.go b/metrics/counter_float64.go index d1197bb8e0..15c81494ef 100644 --- a/metrics/counter_float64.go +++ b/metrics/counter_float64.go @@ -5,13 +5,16 @@ import ( "sync/atomic" ) +type CounterFloat64Snapshot interface { + Count() float64 +} + // CounterFloat64 holds a float64 value that can be incremented and decremented. type CounterFloat64 interface { Clear() - Count() float64 Dec(float64) Inc(float64) - Snapshot() CounterFloat64 + Snapshot() CounterFloat64Snapshot } // GetOrRegisterCounterFloat64 returns an existing CounterFloat64 or constructs and registers @@ -71,47 +74,19 @@ func NewRegisteredCounterFloat64Forced(name string, r Registry) CounterFloat64 { return c } -// CounterFloat64Snapshot is a read-only copy of another CounterFloat64. -type CounterFloat64Snapshot float64 - -// Clear panics. -func (CounterFloat64Snapshot) Clear() { - panic("Clear called on a CounterFloat64Snapshot") -} +// counterFloat64Snapshot is a read-only copy of another CounterFloat64. +type counterFloat64Snapshot float64 // Count returns the value at the time the snapshot was taken. -func (c CounterFloat64Snapshot) Count() float64 { return float64(c) } - -// Dec panics. -func (CounterFloat64Snapshot) Dec(float64) { - panic("Dec called on a CounterFloat64Snapshot") -} +func (c counterFloat64Snapshot) Count() float64 { return float64(c) } -// Inc panics. -func (CounterFloat64Snapshot) Inc(float64) { - panic("Inc called on a CounterFloat64Snapshot") -} - -// Snapshot returns the snapshot. -func (c CounterFloat64Snapshot) Snapshot() CounterFloat64 { return c } - -// NilCounterFloat64 is a no-op CounterFloat64. type NilCounterFloat64 struct{} -// Clear is a no-op. -func (NilCounterFloat64) Clear() {} - -// Count is a no-op. -func (NilCounterFloat64) Count() float64 { return 0.0 } - -// Dec is a no-op. -func (NilCounterFloat64) Dec(i float64) {} - -// Inc is a no-op. -func (NilCounterFloat64) Inc(i float64) {} - -// Snapshot is a no-op. -func (NilCounterFloat64) Snapshot() CounterFloat64 { return NilCounterFloat64{} } +func (NilCounterFloat64) Clear() {} +func (NilCounterFloat64) Count() float64 { return 0.0 } +func (NilCounterFloat64) Dec(i float64) {} +func (NilCounterFloat64) Inc(i float64) {} +func (NilCounterFloat64) Snapshot() CounterFloat64Snapshot { return NilCounterFloat64{} } // StandardCounterFloat64 is the standard implementation of a CounterFloat64 and uses the // atomic to manage a single float64 value. @@ -124,11 +99,6 @@ func (c *StandardCounterFloat64) Clear() { c.floatBits.Store(0) } -// Count returns the current value. -func (c *StandardCounterFloat64) Count() float64 { - return math.Float64frombits(c.floatBits.Load()) -} - // Dec decrements the counter by the given amount. func (c *StandardCounterFloat64) Dec(v float64) { atomicAddFloat(&c.floatBits, -v) @@ -140,8 +110,9 @@ func (c *StandardCounterFloat64) Inc(v float64) { } // Snapshot returns a read-only copy of the counter. -func (c *StandardCounterFloat64) Snapshot() CounterFloat64 { - return CounterFloat64Snapshot(c.Count()) +func (c *StandardCounterFloat64) Snapshot() CounterFloat64Snapshot { + v := math.Float64frombits(c.floatBits.Load()) + return counterFloat64Snapshot(v) } func atomicAddFloat(fbits *atomic.Uint64, v float64) { diff --git a/metrics/counter_float_64_test.go b/metrics/counter_float_64_test.go index f17aca330c..c21bd3307f 100644 --- a/metrics/counter_float_64_test.go +++ b/metrics/counter_float_64_test.go @@ -27,7 +27,7 @@ func BenchmarkCounterFloat64Parallel(b *testing.B) { }() } wg.Wait() - if have, want := c.Count(), 10.0*float64(b.N); have != want { + if have, want := c.Snapshot().Count(), 10.0*float64(b.N); have != want { b.Fatalf("have %f want %f", have, want) } } @@ -36,7 +36,7 @@ func TestCounterFloat64Clear(t *testing.T) { c := NewCounterFloat64() c.Inc(1.0) c.Clear() - if count := c.Count(); count != 0 { + if count := c.Snapshot().Count(); count != 0 { t.Errorf("c.Count(): 0 != %v\n", count) } } @@ -44,7 +44,7 @@ func TestCounterFloat64Clear(t *testing.T) { func TestCounterFloat64Dec1(t *testing.T) { c := NewCounterFloat64() c.Dec(1.0) - if count := c.Count(); count != -1.0 { + if count := c.Snapshot().Count(); count != -1.0 { t.Errorf("c.Count(): -1.0 != %v\n", count) } } @@ -52,7 +52,7 @@ func TestCounterFloat64Dec1(t *testing.T) { func TestCounterFloat64Dec2(t *testing.T) { c := NewCounterFloat64() c.Dec(2.0) - if count := c.Count(); count != -2.0 { + if count := c.Snapshot().Count(); count != -2.0 { t.Errorf("c.Count(): -2.0 != %v\n", count) } } @@ -60,7 +60,7 @@ func TestCounterFloat64Dec2(t *testing.T) { func TestCounterFloat64Inc1(t *testing.T) { c := NewCounterFloat64() c.Inc(1.0) - if count := c.Count(); count != 1.0 { + if count := c.Snapshot().Count(); count != 1.0 { t.Errorf("c.Count(): 1.0 != %v\n", count) } } @@ -68,7 +68,7 @@ func TestCounterFloat64Inc1(t *testing.T) { func TestCounterFloat64Inc2(t *testing.T) { c := NewCounterFloat64() c.Inc(2.0) - if count := c.Count(); count != 2.0 { + if count := c.Snapshot().Count(); count != 2.0 { t.Errorf("c.Count(): 2.0 != %v\n", count) } } @@ -85,7 +85,7 @@ func TestCounterFloat64Snapshot(t *testing.T) { func TestCounterFloat64Zero(t *testing.T) { c := NewCounterFloat64() - if count := c.Count(); count != 0 { + if count := c.Snapshot().Count(); count != 0 { t.Errorf("c.Count(): 0 != %v\n", count) } } @@ -93,7 +93,7 @@ func TestCounterFloat64Zero(t *testing.T) { func TestGetOrRegisterCounterFloat64(t *testing.T) { r := NewRegistry() NewRegisteredCounterFloat64("foo", r).Inc(47.0) - if c := GetOrRegisterCounterFloat64("foo", r); c.Count() != 47.0 { + if c := GetOrRegisterCounterFloat64("foo", r).Snapshot(); c.Count() != 47.0 { t.Fatal(c) } } diff --git a/metrics/counter_test.go b/metrics/counter_test.go index af26ef1548..1b15b23f21 100644 --- a/metrics/counter_test.go +++ b/metrics/counter_test.go @@ -14,7 +14,7 @@ func TestCounterClear(t *testing.T) { c := NewCounter() c.Inc(1) c.Clear() - if count := c.Count(); count != 0 { + if count := c.Snapshot().Count(); count != 0 { t.Errorf("c.Count(): 0 != %v\n", count) } } @@ -22,7 +22,7 @@ func TestCounterClear(t *testing.T) { func TestCounterDec1(t *testing.T) { c := NewCounter() c.Dec(1) - if count := c.Count(); count != -1 { + if count := c.Snapshot().Count(); count != -1 { t.Errorf("c.Count(): -1 != %v\n", count) } } @@ -30,7 +30,7 @@ func TestCounterDec1(t *testing.T) { func TestCounterDec2(t *testing.T) { c := NewCounter() c.Dec(2) - if count := c.Count(); count != -2 { + if count := c.Snapshot().Count(); count != -2 { t.Errorf("c.Count(): -2 != %v\n", count) } } @@ -38,7 +38,7 @@ func TestCounterDec2(t *testing.T) { func TestCounterInc1(t *testing.T) { c := NewCounter() c.Inc(1) - if count := c.Count(); count != 1 { + if count := c.Snapshot().Count(); count != 1 { t.Errorf("c.Count(): 1 != %v\n", count) } } @@ -46,7 +46,7 @@ func TestCounterInc1(t *testing.T) { func TestCounterInc2(t *testing.T) { c := NewCounter() c.Inc(2) - if count := c.Count(); count != 2 { + if count := c.Snapshot().Count(); count != 2 { t.Errorf("c.Count(): 2 != %v\n", count) } } @@ -63,7 +63,7 @@ func TestCounterSnapshot(t *testing.T) { func TestCounterZero(t *testing.T) { c := NewCounter() - if count := c.Count(); count != 0 { + if count := c.Snapshot().Count(); count != 0 { t.Errorf("c.Count(): 0 != %v\n", count) } } @@ -71,7 +71,7 @@ func TestCounterZero(t *testing.T) { func TestGetOrRegisterCounter(t *testing.T) { r := NewRegistry() NewRegisteredCounter("foo", r).Inc(47) - if c := GetOrRegisterCounter("foo", r); c.Count() != 47 { + if c := GetOrRegisterCounter("foo", r).Snapshot(); c.Count() != 47 { t.Fatal(c) } } diff --git a/metrics/doc.go b/metrics/doc.go deleted file mode 100644 index 13f429c168..0000000000 --- a/metrics/doc.go +++ /dev/null @@ -1,4 +0,0 @@ -package metrics - -const epsilon = 0.0000000000000001 -const epsilonPercentile = .00000000001 diff --git a/metrics/ewma.go b/metrics/ewma.go index ed95cba19b..1d7a4f00cf 100644 --- a/metrics/ewma.go +++ b/metrics/ewma.go @@ -7,11 +7,14 @@ import ( "time" ) +type EWMASnapshot interface { + Rate() float64 +} + // EWMAs continuously calculate an exponentially-weighted moving average // based on an outside source of clock ticks. type EWMA interface { - Rate() float64 - Snapshot() EWMA + Snapshot() EWMASnapshot Tick() Update(int64) } @@ -36,40 +39,19 @@ func NewEWMA15() EWMA { return NewEWMA(1 - math.Exp(-5.0/60.0/15)) } -// EWMASnapshot is a read-only copy of another EWMA. -type EWMASnapshot float64 +// ewmaSnapshot is a read-only copy of another EWMA. +type ewmaSnapshot float64 // Rate returns the rate of events per second at the time the snapshot was // taken. -func (a EWMASnapshot) Rate() float64 { return float64(a) } - -// Snapshot returns the snapshot. -func (a EWMASnapshot) Snapshot() EWMA { return a } - -// Tick panics. -func (EWMASnapshot) Tick() { - panic("Tick called on an EWMASnapshot") -} - -// Update panics. -func (EWMASnapshot) Update(int64) { - panic("Update called on an EWMASnapshot") -} +func (a ewmaSnapshot) Rate() float64 { return float64(a) } // NilEWMA is a no-op EWMA. type NilEWMA struct{} -// Rate is a no-op. -func (NilEWMA) Rate() float64 { return 0.0 } - -// Snapshot is a no-op. -func (NilEWMA) Snapshot() EWMA { return NilEWMA{} } - -// Tick is a no-op. -func (NilEWMA) Tick() {} - -// Update is a no-op. -func (NilEWMA) Update(n int64) {} +func (NilEWMA) Snapshot() EWMASnapshot { return (*emptySnapshot)(nil) } +func (NilEWMA) Tick() {} +func (NilEWMA) Update(n int64) {} // StandardEWMA is the standard implementation of an EWMA and tracks the number // of uncounted events and processes them on each tick. It uses the @@ -77,37 +59,50 @@ func (NilEWMA) Update(n int64) {} type StandardEWMA struct { uncounted atomic.Int64 alpha float64 - rate float64 - init bool + rate atomic.Uint64 + init atomic.Bool mutex sync.Mutex } -// Rate returns the moving average rate of events per second. -func (a *StandardEWMA) Rate() float64 { - a.mutex.Lock() - defer a.mutex.Unlock() - return a.rate * float64(time.Second) -} - // Snapshot returns a read-only copy of the EWMA. -func (a *StandardEWMA) Snapshot() EWMA { - return EWMASnapshot(a.Rate()) +func (a *StandardEWMA) Snapshot() EWMASnapshot { + r := math.Float64frombits(a.rate.Load()) * float64(time.Second) + return ewmaSnapshot(r) } // Tick ticks the clock to update the moving average. It assumes it is called // every five seconds. func (a *StandardEWMA) Tick() { - count := a.uncounted.Load() - a.uncounted.Add(-count) - instantRate := float64(count) / float64(5*time.Second) + // Optimization to avoid mutex locking in the hot-path. + if a.init.Load() { + a.updateRate(a.fetchInstantRate()) + return + } + // Slow-path: this is only needed on the first Tick() and preserves transactional updating + // of init and rate in the else block. The first conditional is needed below because + // a different thread could have set a.init = 1 between the time of the first atomic load and when + // the lock was acquired. a.mutex.Lock() - defer a.mutex.Unlock() - if a.init { - a.rate += a.alpha * (instantRate - a.rate) + if a.init.Load() { + // The fetchInstantRate() uses atomic loading, which is unnecessary in this critical section + // but again, this section is only invoked on the first successful Tick() operation. + a.updateRate(a.fetchInstantRate()) } else { - a.init = true - a.rate = instantRate + a.init.Store(true) + a.rate.Store(math.Float64bits(a.fetchInstantRate())) } + a.mutex.Unlock() +} + +func (a *StandardEWMA) fetchInstantRate() float64 { + count := a.uncounted.Swap(0) + return float64(count) / float64(5*time.Second) +} + +func (a *StandardEWMA) updateRate(instantRate float64) { + currentRate := math.Float64frombits(a.rate.Load()) + currentRate += a.alpha * (instantRate - currentRate) + a.rate.Store(math.Float64bits(currentRate)) } // Update adds n uncounted events. diff --git a/metrics/ewma_test.go b/metrics/ewma_test.go index 5b24419161..9a91b43db8 100644 --- a/metrics/ewma_test.go +++ b/metrics/ewma_test.go @@ -5,6 +5,8 @@ import ( "testing" ) +const epsilon = 0.0000000000000001 + func BenchmarkEWMA(b *testing.B) { a := NewEWMA1() b.ResetTimer() @@ -14,72 +16,33 @@ func BenchmarkEWMA(b *testing.B) { } } +func BenchmarkEWMAParallel(b *testing.B) { + a := NewEWMA1() + b.ResetTimer() + + b.RunParallel(func(pb *testing.PB) { + for pb.Next() { + a.Update(1) + a.Tick() + } + }) +} + func TestEWMA1(t *testing.T) { a := NewEWMA1() a.Update(3) a.Tick() - if rate := a.Rate(); math.Abs(0.6-rate) > epsilon { - t.Errorf("initial a.Rate(): 0.6 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.22072766470286553-rate) > epsilon { - t.Errorf("1 minute a.Rate(): 0.22072766470286553 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.08120116994196772-rate) > epsilon { - t.Errorf("2 minute a.Rate(): 0.08120116994196772 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.029872241020718428-rate) > epsilon { - t.Errorf("3 minute a.Rate(): 0.029872241020718428 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.01098938333324054-rate) > epsilon { - t.Errorf("4 minute a.Rate(): 0.01098938333324054 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.004042768199451294-rate) > epsilon { - t.Errorf("5 minute a.Rate(): 0.004042768199451294 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.0014872513059998212-rate) > epsilon { - t.Errorf("6 minute a.Rate(): 0.0014872513059998212 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.0005471291793327122-rate) > epsilon { - t.Errorf("7 minute a.Rate(): 0.0005471291793327122 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.00020127757674150815-rate) > epsilon { - t.Errorf("8 minute a.Rate(): 0.00020127757674150815 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(7.404588245200814e-05-rate) > epsilon { - t.Errorf("9 minute a.Rate(): 7.404588245200814e-05 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(2.7239957857491083e-05-rate) > epsilon { - t.Errorf("10 minute a.Rate(): 2.7239957857491083e-05 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(1.0021020474147462e-05-rate) > epsilon { - t.Errorf("11 minute a.Rate(): 1.0021020474147462e-05 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(3.6865274119969525e-06-rate) > epsilon { - t.Errorf("12 minute a.Rate(): 3.6865274119969525e-06 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(1.3561976441886433e-06-rate) > epsilon { - t.Errorf("13 minute a.Rate(): 1.3561976441886433e-06 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(4.989172314621449e-07-rate) > epsilon { - t.Errorf("14 minute a.Rate(): 4.989172314621449e-07 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(1.8354139230109722e-07-rate) > epsilon { - t.Errorf("15 minute a.Rate(): 1.8354139230109722e-07 != %v\n", rate) + for i, want := range []float64{0.6, + 0.22072766470286553, 0.08120116994196772, 0.029872241020718428, + 0.01098938333324054, 0.004042768199451294, 0.0014872513059998212, + 0.0005471291793327122, 0.00020127757674150815, 7.404588245200814e-05, + 2.7239957857491083e-05, 1.0021020474147462e-05, 3.6865274119969525e-06, + 1.3561976441886433e-06, 4.989172314621449e-07, 1.8354139230109722e-07, + } { + if rate := a.Snapshot().Rate(); math.Abs(want-rate) > epsilon { + t.Errorf("%d minute a.Snapshot().Rate(): %f != %v\n", i, want, rate) + } + elapseMinute(a) } } @@ -87,68 +50,17 @@ func TestEWMA5(t *testing.T) { a := NewEWMA5() a.Update(3) a.Tick() - if rate := a.Rate(); math.Abs(0.6-rate) > epsilon { - t.Errorf("initial a.Rate(): 0.6 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.49123845184678905-rate) > epsilon { - t.Errorf("1 minute a.Rate(): 0.49123845184678905 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.4021920276213837-rate) > epsilon { - t.Errorf("2 minute a.Rate(): 0.4021920276213837 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.32928698165641596-rate) > epsilon { - t.Errorf("3 minute a.Rate(): 0.32928698165641596 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.269597378470333-rate) > epsilon { - t.Errorf("4 minute a.Rate(): 0.269597378470333 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.2207276647028654-rate) > epsilon { - t.Errorf("5 minute a.Rate(): 0.2207276647028654 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.18071652714732128-rate) > epsilon { - t.Errorf("6 minute a.Rate(): 0.18071652714732128 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.14795817836496392-rate) > epsilon { - t.Errorf("7 minute a.Rate(): 0.14795817836496392 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.12113791079679326-rate) > epsilon { - t.Errorf("8 minute a.Rate(): 0.12113791079679326 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.09917933293295193-rate) > epsilon { - t.Errorf("9 minute a.Rate(): 0.09917933293295193 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.08120116994196763-rate) > epsilon { - t.Errorf("10 minute a.Rate(): 0.08120116994196763 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.06648189501740036-rate) > epsilon { - t.Errorf("11 minute a.Rate(): 0.06648189501740036 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.05443077197364752-rate) > epsilon { - t.Errorf("12 minute a.Rate(): 0.05443077197364752 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.04456414692860035-rate) > epsilon { - t.Errorf("13 minute a.Rate(): 0.04456414692860035 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.03648603757513079-rate) > epsilon { - t.Errorf("14 minute a.Rate(): 0.03648603757513079 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.0298722410207183831020718428-rate) > epsilon { - t.Errorf("15 minute a.Rate(): 0.0298722410207183831020718428 != %v\n", rate) + for i, want := range []float64{ + 0.6, 0.49123845184678905, 0.4021920276213837, 0.32928698165641596, + 0.269597378470333, 0.2207276647028654, 0.18071652714732128, + 0.14795817836496392, 0.12113791079679326, 0.09917933293295193, + 0.08120116994196763, 0.06648189501740036, 0.05443077197364752, + 0.04456414692860035, 0.03648603757513079, 0.0298722410207183831020718428, + } { + if rate := a.Snapshot().Rate(); math.Abs(want-rate) > epsilon { + t.Errorf("%d minute a.Snapshot().Rate(): %f != %v\n", i, want, rate) + } + elapseMinute(a) } } @@ -156,68 +68,17 @@ func TestEWMA15(t *testing.T) { a := NewEWMA15() a.Update(3) a.Tick() - if rate := a.Rate(); math.Abs(0.6-rate) > epsilon { - t.Errorf("initial a.Rate(): 0.6 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.5613041910189706-rate) > epsilon { - t.Errorf("1 minute a.Rate(): 0.5613041910189706 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.5251039914257684-rate) > epsilon { - t.Errorf("2 minute a.Rate(): 0.5251039914257684 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.4912384518467888184678905-rate) > epsilon { - t.Errorf("3 minute a.Rate(): 0.4912384518467888184678905 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.459557003018789-rate) > epsilon { - t.Errorf("4 minute a.Rate(): 0.459557003018789 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.4299187863442732-rate) > epsilon { - t.Errorf("5 minute a.Rate(): 0.4299187863442732 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.4021920276213831-rate) > epsilon { - t.Errorf("6 minute a.Rate(): 0.4021920276213831 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.37625345116383313-rate) > epsilon { - t.Errorf("7 minute a.Rate(): 0.37625345116383313 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.3519877317060185-rate) > epsilon { - t.Errorf("8 minute a.Rate(): 0.3519877317060185 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.3292869816564153165641596-rate) > epsilon { - t.Errorf("9 minute a.Rate(): 0.3292869816564153165641596 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.3080502714195546-rate) > epsilon { - t.Errorf("10 minute a.Rate(): 0.3080502714195546 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.2881831806538789-rate) > epsilon { - t.Errorf("11 minute a.Rate(): 0.2881831806538789 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.26959737847033216-rate) > epsilon { - t.Errorf("12 minute a.Rate(): 0.26959737847033216 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.2522102307052083-rate) > epsilon { - t.Errorf("13 minute a.Rate(): 0.2522102307052083 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.23594443252115815-rate) > epsilon { - t.Errorf("14 minute a.Rate(): 0.23594443252115815 != %v\n", rate) - } - elapseMinute(a) - if rate := a.Rate(); math.Abs(0.2207276647028646247028654470286553-rate) > epsilon { - t.Errorf("15 minute a.Rate(): 0.2207276647028646247028654470286553 != %v\n", rate) + for i, want := range []float64{ + 0.6, 0.5613041910189706, 0.5251039914257684, 0.4912384518467888184678905, + 0.459557003018789, 0.4299187863442732, 0.4021920276213831, + 0.37625345116383313, 0.3519877317060185, 0.3292869816564153165641596, + 0.3080502714195546, 0.2881831806538789, 0.26959737847033216, + 0.2522102307052083, 0.23594443252115815, 0.2207276647028646247028654470286553, + } { + if rate := a.Snapshot().Rate(); math.Abs(want-rate) > epsilon { + t.Errorf("%d minute a.Snapshot().Rate(): %f != %v\n", i, want, rate) + } + elapseMinute(a) } } diff --git a/metrics/exp/exp.go b/metrics/exp/exp.go index 748d91dcad..a1382b7b86 100644 --- a/metrics/exp/exp.go +++ b/metrics/exp/exp.go @@ -109,25 +109,25 @@ func (exp *exp) getInfo(name string) *expvar.String { return v } -func (exp *exp) publishCounter(name string, metric metrics.Counter) { +func (exp *exp) publishCounter(name string, metric metrics.CounterSnapshot) { v := exp.getInt(name) v.Set(metric.Count()) } -func (exp *exp) publishCounterFloat64(name string, metric metrics.CounterFloat64) { +func (exp *exp) publishCounterFloat64(name string, metric metrics.CounterFloat64Snapshot) { v := exp.getFloat(name) v.Set(metric.Count()) } -func (exp *exp) publishGauge(name string, metric metrics.Gauge) { +func (exp *exp) publishGauge(name string, metric metrics.GaugeSnapshot) { v := exp.getInt(name) v.Set(metric.Value()) } -func (exp *exp) publishGaugeFloat64(name string, metric metrics.GaugeFloat64) { +func (exp *exp) publishGaugeFloat64(name string, metric metrics.GaugeFloat64Snapshot) { exp.getFloat(name).Set(metric.Value()) } -func (exp *exp) publishGaugeInfo(name string, metric metrics.GaugeInfo) { +func (exp *exp) publishGaugeInfo(name string, metric metrics.GaugeInfoSnapshot) { exp.getInfo(name).Set(metric.Value().String()) } @@ -176,28 +176,28 @@ func (exp *exp) publishTimer(name string, metric metrics.Timer) { func (exp *exp) publishResettingTimer(name string, metric metrics.ResettingTimer) { t := metric.Snapshot() - ps := t.Percentiles([]float64{50, 75, 95, 99}) - exp.getInt(name + ".count").Set(int64(len(t.Values()))) + ps := t.Percentiles([]float64{0.50, 0.75, 0.95, 0.99}) + exp.getInt(name + ".count").Set(int64(t.Count())) exp.getFloat(name + ".mean").Set(t.Mean()) - exp.getInt(name + ".50-percentile").Set(ps[0]) - exp.getInt(name + ".75-percentile").Set(ps[1]) - exp.getInt(name + ".95-percentile").Set(ps[2]) - exp.getInt(name + ".99-percentile").Set(ps[3]) + exp.getFloat(name + ".50-percentile").Set(ps[0]) + exp.getFloat(name + ".75-percentile").Set(ps[1]) + exp.getFloat(name + ".95-percentile").Set(ps[2]) + exp.getFloat(name + ".99-percentile").Set(ps[3]) } func (exp *exp) syncToExpvar() { exp.registry.Each(func(name string, i interface{}) { switch i := i.(type) { case metrics.Counter: - exp.publishCounter(name, i) + exp.publishCounter(name, i.Snapshot()) case metrics.CounterFloat64: - exp.publishCounterFloat64(name, i) + exp.publishCounterFloat64(name, i.Snapshot()) case metrics.Gauge: - exp.publishGauge(name, i) + exp.publishGauge(name, i.Snapshot()) case metrics.GaugeFloat64: - exp.publishGaugeFloat64(name, i) + exp.publishGaugeFloat64(name, i.Snapshot()) case metrics.GaugeInfo: - exp.publishGaugeInfo(name, i) + exp.publishGaugeInfo(name, i.Snapshot()) case metrics.Histogram: exp.publishHistogram(name, i) case metrics.Meter: diff --git a/metrics/gauge.go b/metrics/gauge.go index 81137d7f7c..68f8f11abc 100644 --- a/metrics/gauge.go +++ b/metrics/gauge.go @@ -2,13 +2,18 @@ package metrics import "sync/atomic" +// gaugeSnapshot contains a readonly int64. +type GaugeSnapshot interface { + Value() int64 +} + // Gauges hold an int64 value that can be set arbitrarily. type Gauge interface { - Snapshot() Gauge + Snapshot() GaugeSnapshot Update(int64) + UpdateIfGt(int64) Dec(int64) Inc(int64) - Value() int64 } // GetOrRegisterGauge returns an existing Gauge or constructs and registers a @@ -38,65 +43,20 @@ func NewRegisteredGauge(name string, r Registry) Gauge { return c } -// NewFunctionalGauge constructs a new FunctionalGauge. -func NewFunctionalGauge(f func() int64) Gauge { - if !Enabled { - return NilGauge{} - } - return &FunctionalGauge{value: f} -} - -// NewRegisteredFunctionalGauge constructs and registers a new StandardGauge. -func NewRegisteredFunctionalGauge(name string, r Registry, f func() int64) Gauge { - c := NewFunctionalGauge(f) - if nil == r { - r = DefaultRegistry - } - r.Register(name, c) - return c -} - -// GaugeSnapshot is a read-only copy of another Gauge. -type GaugeSnapshot int64 - -// Snapshot returns the snapshot. -func (g GaugeSnapshot) Snapshot() Gauge { return g } - -// Update panics. -func (GaugeSnapshot) Update(int64) { - panic("Update called on a GaugeSnapshot") -} - -// Dec panics. -func (GaugeSnapshot) Dec(int64) { - panic("Dec called on a GaugeSnapshot") -} - -// Inc panics. -func (GaugeSnapshot) Inc(int64) { - panic("Inc called on a GaugeSnapshot") -} +// gaugeSnapshot is a read-only copy of another Gauge. +type gaugeSnapshot int64 // Value returns the value at the time the snapshot was taken. -func (g GaugeSnapshot) Value() int64 { return int64(g) } +func (g gaugeSnapshot) Value() int64 { return int64(g) } // NilGauge is a no-op Gauge. type NilGauge struct{} -// Snapshot is a no-op. -func (NilGauge) Snapshot() Gauge { return NilGauge{} } - -// Update is a no-op. -func (NilGauge) Update(v int64) {} - -// Dec is a no-op. -func (NilGauge) Dec(i int64) {} - -// Inc is a no-op. -func (NilGauge) Inc(i int64) {} - -// Value is a no-op. -func (NilGauge) Value() int64 { return 0 } +func (NilGauge) Snapshot() GaugeSnapshot { return (*emptySnapshot)(nil) } +func (NilGauge) Update(v int64) {} +func (NilGauge) UpdateIfGt(v int64) {} +func (NilGauge) Dec(i int64) {} +func (NilGauge) Inc(i int64) {} // StandardGauge is the standard implementation of a Gauge and uses the // sync/atomic package to manage a single int64 value. @@ -105,8 +65,8 @@ type StandardGauge struct { } // Snapshot returns a read-only copy of the gauge. -func (g *StandardGauge) Snapshot() Gauge { - return GaugeSnapshot(g.Value()) +func (g *StandardGauge) Snapshot() GaugeSnapshot { + return gaugeSnapshot(g.value.Load()) } // Update updates the gauge's value. @@ -114,9 +74,17 @@ func (g *StandardGauge) Update(v int64) { g.value.Store(v) } -// Value returns the gauge's current value. -func (g *StandardGauge) Value() int64 { - return g.value.Load() +// Update updates the gauge's value if v is larger then the current valie. +func (g *StandardGauge) UpdateIfGt(v int64) { + for { + exist := g.value.Load() + if exist >= v { + break + } + if g.value.CompareAndSwap(exist, v) { + break + } + } } // Dec decrements the gauge's current value by the given amount. @@ -128,31 +96,3 @@ func (g *StandardGauge) Dec(i int64) { func (g *StandardGauge) Inc(i int64) { g.value.Add(i) } - -// FunctionalGauge returns value from given function -type FunctionalGauge struct { - value func() int64 -} - -// Value returns the gauge's current value. -func (g FunctionalGauge) Value() int64 { - return g.value() -} - -// Snapshot returns the snapshot. -func (g FunctionalGauge) Snapshot() Gauge { return GaugeSnapshot(g.Value()) } - -// Update panics. -func (FunctionalGauge) Update(int64) { - panic("Update called on a FunctionalGauge") -} - -// Dec panics. -func (FunctionalGauge) Dec(int64) { - panic("Dec called on a FunctionalGauge") -} - -// Inc panics. -func (FunctionalGauge) Inc(int64) { - panic("Inc called on a FunctionalGauge") -} diff --git a/metrics/gauge_float64.go b/metrics/gauge_float64.go index 237ff8036e..967f2bc60e 100644 --- a/metrics/gauge_float64.go +++ b/metrics/gauge_float64.go @@ -5,11 +5,14 @@ import ( "sync/atomic" ) -// GaugeFloat64s hold a float64 value that can be set arbitrarily. +type GaugeFloat64Snapshot interface { + Value() float64 +} + +// GaugeFloat64 hold a float64 value that can be set arbitrarily. type GaugeFloat64 interface { - Snapshot() GaugeFloat64 + Snapshot() GaugeFloat64Snapshot Update(float64) - Value() float64 } // GetOrRegisterGaugeFloat64 returns an existing GaugeFloat64 or constructs and registers a @@ -39,49 +42,18 @@ func NewRegisteredGaugeFloat64(name string, r Registry) GaugeFloat64 { return c } -// NewFunctionalGauge constructs a new FunctionalGauge. -func NewFunctionalGaugeFloat64(f func() float64) GaugeFloat64 { - if !Enabled { - return NilGaugeFloat64{} - } - return &FunctionalGaugeFloat64{value: f} -} - -// NewRegisteredFunctionalGauge constructs and registers a new StandardGauge. -func NewRegisteredFunctionalGaugeFloat64(name string, r Registry, f func() float64) GaugeFloat64 { - c := NewFunctionalGaugeFloat64(f) - if nil == r { - r = DefaultRegistry - } - r.Register(name, c) - return c -} - -// GaugeFloat64Snapshot is a read-only copy of another GaugeFloat64. -type GaugeFloat64Snapshot float64 - -// Snapshot returns the snapshot. -func (g GaugeFloat64Snapshot) Snapshot() GaugeFloat64 { return g } - -// Update panics. -func (GaugeFloat64Snapshot) Update(float64) { - panic("Update called on a GaugeFloat64Snapshot") -} +// gaugeFloat64Snapshot is a read-only copy of another GaugeFloat64. +type gaugeFloat64Snapshot float64 // Value returns the value at the time the snapshot was taken. -func (g GaugeFloat64Snapshot) Value() float64 { return float64(g) } +func (g gaugeFloat64Snapshot) Value() float64 { return float64(g) } // NilGauge is a no-op Gauge. type NilGaugeFloat64 struct{} -// Snapshot is a no-op. -func (NilGaugeFloat64) Snapshot() GaugeFloat64 { return NilGaugeFloat64{} } - -// Update is a no-op. -func (NilGaugeFloat64) Update(v float64) {} - -// Value is a no-op. -func (NilGaugeFloat64) Value() float64 { return 0.0 } +func (NilGaugeFloat64) Snapshot() GaugeFloat64Snapshot { return NilGaugeFloat64{} } +func (NilGaugeFloat64) Update(v float64) {} +func (NilGaugeFloat64) Value() float64 { return 0.0 } // StandardGaugeFloat64 is the standard implementation of a GaugeFloat64 and uses // atomic to manage a single float64 value. @@ -90,34 +62,12 @@ type StandardGaugeFloat64 struct { } // Snapshot returns a read-only copy of the gauge. -func (g *StandardGaugeFloat64) Snapshot() GaugeFloat64 { - return GaugeFloat64Snapshot(g.Value()) +func (g *StandardGaugeFloat64) Snapshot() GaugeFloat64Snapshot { + v := math.Float64frombits(g.floatBits.Load()) + return gaugeFloat64Snapshot(v) } // Update updates the gauge's value. func (g *StandardGaugeFloat64) Update(v float64) { g.floatBits.Store(math.Float64bits(v)) } - -// Value returns the gauge's current value. -func (g *StandardGaugeFloat64) Value() float64 { - return math.Float64frombits(g.floatBits.Load()) -} - -// FunctionalGaugeFloat64 returns value from given function -type FunctionalGaugeFloat64 struct { - value func() float64 -} - -// Value returns the gauge's current value. -func (g FunctionalGaugeFloat64) Value() float64 { - return g.value() -} - -// Snapshot returns the snapshot. -func (g FunctionalGaugeFloat64) Snapshot() GaugeFloat64 { return GaugeFloat64Snapshot(g.Value()) } - -// Update panics. -func (FunctionalGaugeFloat64) Update(float64) { - panic("Update called on a FunctionalGaugeFloat64") -} diff --git a/metrics/gauge_float64_test.go b/metrics/gauge_float64_test.go index 647d090009..f0ac7ea5e7 100644 --- a/metrics/gauge_float64_test.go +++ b/metrics/gauge_float64_test.go @@ -26,19 +26,11 @@ func BenchmarkGaugeFloat64Parallel(b *testing.B) { }() } wg.Wait() - if have, want := c.Value(), float64(b.N-1); have != want { + if have, want := c.Snapshot().Value(), float64(b.N-1); have != want { b.Fatalf("have %f want %f", have, want) } } -func TestGaugeFloat64(t *testing.T) { - g := NewGaugeFloat64() - g.Update(47.0) - if v := g.Value(); 47.0 != v { - t.Errorf("g.Value(): 47.0 != %v\n", v) - } -} - func TestGaugeFloat64Snapshot(t *testing.T) { g := NewGaugeFloat64() g.Update(47.0) @@ -53,28 +45,7 @@ func TestGetOrRegisterGaugeFloat64(t *testing.T) { r := NewRegistry() NewRegisteredGaugeFloat64("foo", r).Update(47.0) t.Logf("registry: %v", r) - if g := GetOrRegisterGaugeFloat64("foo", r); 47.0 != g.Value() { - t.Fatal(g) - } -} - -func TestFunctionalGaugeFloat64(t *testing.T) { - var counter float64 - fg := NewFunctionalGaugeFloat64(func() float64 { - counter++ - return counter - }) - fg.Value() - fg.Value() - if counter != 2 { - t.Error("counter != 2") - } -} - -func TestGetOrRegisterFunctionalGaugeFloat64(t *testing.T) { - r := NewRegistry() - NewRegisteredFunctionalGaugeFloat64("foo", r, func() float64 { return 47 }) - if g := GetOrRegisterGaugeFloat64("foo", r); g.Value() != 47 { + if g := GetOrRegisterGaugeFloat64("foo", r).Snapshot(); 47.0 != g.Value() { t.Fatal(g) } } diff --git a/metrics/gauge_info.go b/metrics/gauge_info.go index 0a921d6abd..b54960f22a 100644 --- a/metrics/gauge_info.go +++ b/metrics/gauge_info.go @@ -23,14 +23,17 @@ import ( "sync" ) +type GaugeInfoSnapshot interface { + Value() GaugeInfoValue +} + // GaugeInfos hold a GaugeInfoValue value that can be set arbitrarily. type GaugeInfo interface { - Snapshot() GaugeInfo Update(GaugeInfoValue) - Value() GaugeInfoValue + Snapshot() GaugeInfoSnapshot } -// GaugeInfoValue is a mappng of (string) keys to (string) values +// GaugeInfoValue is a mapping of keys to values type GaugeInfoValue map[string]string func (val GaugeInfoValue) String() string { @@ -67,49 +70,17 @@ func NewRegisteredGaugeInfo(name string, r Registry) GaugeInfo { return c } -// NewFunctionalGauge constructs a new FunctionalGauge. -func NewFunctionalGaugeInfo(f func() GaugeInfoValue) GaugeInfo { - if !Enabled { - return NilGaugeInfo{} - } - return &FunctionalGaugeInfo{value: f} -} - -// NewRegisteredFunctionalGauge constructs and registers a new StandardGauge. -func NewRegisteredFunctionalGaugeInfo(name string, r Registry, f func() GaugeInfoValue) GaugeInfo { - c := NewFunctionalGaugeInfo(f) - if nil == r { - r = DefaultRegistry - } - r.Register(name, c) - return c -} - -// GaugeInfoSnapshot is a read-only copy of another GaugeInfo. -type GaugeInfoSnapshot GaugeInfoValue - -// Snapshot returns the snapshot. -func (g GaugeInfoSnapshot) Snapshot() GaugeInfo { return g } - -// Update panics. -func (GaugeInfoSnapshot) Update(GaugeInfoValue) { - panic("Update called on a GaugeInfoSnapshot") -} +// gaugeInfoSnapshot is a read-only copy of another GaugeInfo. +type gaugeInfoSnapshot GaugeInfoValue // Value returns the value at the time the snapshot was taken. -func (g GaugeInfoSnapshot) Value() GaugeInfoValue { return GaugeInfoValue(g) } +func (g gaugeInfoSnapshot) Value() GaugeInfoValue { return GaugeInfoValue(g) } -// NilGauge is a no-op Gauge. type NilGaugeInfo struct{} -// Snapshot is a no-op. -func (NilGaugeInfo) Snapshot() GaugeInfo { return NilGaugeInfo{} } - -// Update is a no-op. -func (NilGaugeInfo) Update(v GaugeInfoValue) {} - -// Value is a no-op. -func (NilGaugeInfo) Value() GaugeInfoValue { return GaugeInfoValue{} } +func (NilGaugeInfo) Snapshot() GaugeInfoSnapshot { return NilGaugeInfo{} } +func (NilGaugeInfo) Update(v GaugeInfoValue) {} +func (NilGaugeInfo) Value() GaugeInfoValue { return GaugeInfoValue{} } // StandardGaugeInfo is the standard implementation of a GaugeInfo and uses // sync.Mutex to manage a single string value. @@ -119,8 +90,8 @@ type StandardGaugeInfo struct { } // Snapshot returns a read-only copy of the gauge. -func (g *StandardGaugeInfo) Snapshot() GaugeInfo { - return GaugeInfoSnapshot(g.Value()) +func (g *StandardGaugeInfo) Snapshot() GaugeInfoSnapshot { + return gaugeInfoSnapshot(g.value) } // Update updates the gauge's value. @@ -129,34 +100,3 @@ func (g *StandardGaugeInfo) Update(v GaugeInfoValue) { defer g.mutex.Unlock() g.value = v } - -// Value returns the gauge's current value. -func (g *StandardGaugeInfo) Value() GaugeInfoValue { - g.mutex.Lock() - defer g.mutex.Unlock() - return g.value -} - -// FunctionalGaugeInfo returns value from given function -type FunctionalGaugeInfo struct { - value func() GaugeInfoValue -} - -// Value returns the gauge's current value. -func (g FunctionalGaugeInfo) Value() GaugeInfoValue { - return g.value() -} - -// Value returns the gauge's current value in JSON string format -func (g FunctionalGaugeInfo) ValueJsonString() string { - data, _ := json.Marshal(g.value()) - return string(data) -} - -// Snapshot returns the snapshot. -func (g FunctionalGaugeInfo) Snapshot() GaugeInfo { return GaugeInfoSnapshot(g.Value()) } - -// Update panics. -func (FunctionalGaugeInfo) Update(GaugeInfoValue) { - panic("Update called on a FunctionalGaugeInfo") -} diff --git a/metrics/gauge_info_test.go b/metrics/gauge_info_test.go index b9fd199744..c5b681913f 100644 --- a/metrics/gauge_info_test.go +++ b/metrics/gauge_info_test.go @@ -19,7 +19,6 @@ package metrics import ( - "strconv" "testing" ) @@ -32,22 +31,14 @@ func TestGaugeInfoJsonString(t *testing.T) { }, ) want := `{"anotherKey":"any_string_value","chain_id":"5","third_key":"anything"}` - if have := g.Value().String(); have != want { - t.Errorf("\nhave: %v\nwant: %v\n", have, want) - } -} -func TestGaugeInfoSnapshot(t *testing.T) { - g := NewGaugeInfo() - g.Update(GaugeInfoValue{"value": "original"}) - snapshot := g.Snapshot() // Snapshot @chainid 5 + original := g.Snapshot() g.Update(GaugeInfoValue{"value": "updated"}) - // The 'g' should be updated - if have, want := g.Value().String(), `{"value":"updated"}`; have != want { + + if have := original.Value().String(); have != want { t.Errorf("\nhave: %v\nwant: %v\n", have, want) } - // Snapshot should be unupdated - if have, want := snapshot.Value().String(), `{"value":"original"}`; have != want { + if have, want := g.Snapshot().Value().String(), `{"value":"updated"}`; have != want { t.Errorf("\nhave: %v\nwant: %v\n", have, want) } } @@ -56,38 +47,8 @@ func TestGetOrRegisterGaugeInfo(t *testing.T) { r := NewRegistry() NewRegisteredGaugeInfo("foo", r).Update( GaugeInfoValue{"chain_id": "5"}) - g := GetOrRegisterGaugeInfo("foo", r) + g := GetOrRegisterGaugeInfo("foo", r).Snapshot() if have, want := g.Value().String(), `{"chain_id":"5"}`; have != want { t.Errorf("have\n%v\nwant\n%v\n", have, want) } } - -func TestFunctionalGaugeInfo(t *testing.T) { - info := GaugeInfoValue{"chain_id": "0"} - counter := 1 - // A "functional" gauge invokes the method to obtain the value - fg := NewFunctionalGaugeInfo(func() GaugeInfoValue { - info["chain_id"] = strconv.Itoa(counter) - counter++ - return info - }) - fg.Value() - fg.Value() - if have, want := info["chain_id"], "2"; have != want { - t.Errorf("have %v want %v", have, want) - } -} - -func TestGetOrRegisterFunctionalGaugeInfo(t *testing.T) { - r := NewRegistry() - NewRegisteredFunctionalGaugeInfo("foo", r, func() GaugeInfoValue { - return GaugeInfoValue{ - "chain_id": "5", - } - }) - want := `{"chain_id":"5"}` - have := GetOrRegisterGaugeInfo("foo", r).Value().String() - if have != want { - t.Errorf("have\n%v\nwant\n%v\n", have, want) - } -} diff --git a/metrics/gauge_test.go b/metrics/gauge_test.go index a98fe985d8..f2ba930bc4 100644 --- a/metrics/gauge_test.go +++ b/metrics/gauge_test.go @@ -1,7 +1,6 @@ package metrics import ( - "fmt" "testing" ) @@ -13,14 +12,6 @@ func BenchmarkGauge(b *testing.B) { } } -func TestGauge(t *testing.T) { - g := NewGauge() - g.Update(int64(47)) - if v := g.Value(); v != 47 { - t.Errorf("g.Value(): 47 != %v\n", v) - } -} - func TestGaugeSnapshot(t *testing.T) { g := NewGauge() g.Update(int64(47)) @@ -34,35 +25,7 @@ func TestGaugeSnapshot(t *testing.T) { func TestGetOrRegisterGauge(t *testing.T) { r := NewRegistry() NewRegisteredGauge("foo", r).Update(47) - if g := GetOrRegisterGauge("foo", r); g.Value() != 47 { - t.Fatal(g) - } -} - -func TestFunctionalGauge(t *testing.T) { - var counter int64 - fg := NewFunctionalGauge(func() int64 { - counter++ - return counter - }) - fg.Value() - fg.Value() - if counter != 2 { - t.Error("counter != 2") - } -} - -func TestGetOrRegisterFunctionalGauge(t *testing.T) { - r := NewRegistry() - NewRegisteredFunctionalGauge("foo", r, func() int64 { return 47 }) - if g := GetOrRegisterGauge("foo", r); g.Value() != 47 { + if g := GetOrRegisterGauge("foo", r); g.Snapshot().Value() != 47 { t.Fatal(g) } } - -func ExampleGetOrRegisterGauge() { - m := "server.bytes_sent" - g := GetOrRegisterGauge(m, nil) - g.Update(47) - fmt.Println(g.Value()) // Output: 47 -} diff --git a/metrics/graphite.go b/metrics/graphite.go index 4e3dd3b3b8..aba752e0ed 100644 --- a/metrics/graphite.go +++ b/metrics/graphite.go @@ -66,15 +66,15 @@ func graphite(c *GraphiteConfig) error { c.Registry.Each(func(name string, i interface{}) { switch metric := i.(type) { case Counter: - fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, metric.Count(), now) + fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, metric.Snapshot().Count(), now) case CounterFloat64: - fmt.Fprintf(w, "%s.%s.count %f %d\n", c.Prefix, name, metric.Count(), now) + fmt.Fprintf(w, "%s.%s.count %f %d\n", c.Prefix, name, metric.Snapshot().Count(), now) case Gauge: - fmt.Fprintf(w, "%s.%s.value %d %d\n", c.Prefix, name, metric.Value(), now) + fmt.Fprintf(w, "%s.%s.value %d %d\n", c.Prefix, name, metric.Snapshot().Value(), now) case GaugeFloat64: - fmt.Fprintf(w, "%s.%s.value %f %d\n", c.Prefix, name, metric.Value(), now) + fmt.Fprintf(w, "%s.%s.value %f %d\n", c.Prefix, name, metric.Snapshot().Value(), now) case GaugeInfo: - fmt.Fprintf(w, "%s.%s.value %s %d\n", c.Prefix, name, metric.Value().String(), now) + fmt.Fprintf(w, "%s.%s.value %s %d\n", c.Prefix, name, metric.Snapshot().Value().String(), now) case Histogram: h := metric.Snapshot() ps := h.Percentiles(c.Percentiles) diff --git a/metrics/histogram.go b/metrics/histogram.go index 2c54ce8b40..44de588bc1 100644 --- a/metrics/histogram.go +++ b/metrics/histogram.go @@ -1,20 +1,14 @@ package metrics +type HistogramSnapshot interface { + SampleSnapshot +} + // Histograms calculate distribution statistics from a series of int64 values. type Histogram interface { Clear() - Count() int64 - Max() int64 - Mean() float64 - Min() int64 - Percentile(float64) float64 - Percentiles([]float64) []float64 - Sample() Sample - Snapshot() Histogram - StdDev() float64 - Sum() int64 Update(int64) - Variance() float64 + Snapshot() HistogramSnapshot } // GetOrRegisterHistogram returns an existing Histogram or constructs and @@ -54,108 +48,12 @@ func NewRegisteredHistogram(name string, r Registry, s Sample) Histogram { return c } -// HistogramSnapshot is a read-only copy of another Histogram. -type HistogramSnapshot struct { - sample *SampleSnapshot -} - -// Clear panics. -func (*HistogramSnapshot) Clear() { - panic("Clear called on a HistogramSnapshot") -} - -// Count returns the number of samples recorded at the time the snapshot was -// taken. -func (h *HistogramSnapshot) Count() int64 { return h.sample.Count() } - -// Max returns the maximum value in the sample at the time the snapshot was -// taken. -func (h *HistogramSnapshot) Max() int64 { return h.sample.Max() } - -// Mean returns the mean of the values in the sample at the time the snapshot -// was taken. -func (h *HistogramSnapshot) Mean() float64 { return h.sample.Mean() } - -// Min returns the minimum value in the sample at the time the snapshot was -// taken. -func (h *HistogramSnapshot) Min() int64 { return h.sample.Min() } - -// Percentile returns an arbitrary percentile of values in the sample at the -// time the snapshot was taken. -func (h *HistogramSnapshot) Percentile(p float64) float64 { - return h.sample.Percentile(p) -} - -// Percentiles returns a slice of arbitrary percentiles of values in the sample -// at the time the snapshot was taken. -func (h *HistogramSnapshot) Percentiles(ps []float64) []float64 { - return h.sample.Percentiles(ps) -} - -// Sample returns the Sample underlying the histogram. -func (h *HistogramSnapshot) Sample() Sample { return h.sample } - -// Snapshot returns the snapshot. -func (h *HistogramSnapshot) Snapshot() Histogram { return h } - -// StdDev returns the standard deviation of the values in the sample at the -// time the snapshot was taken. -func (h *HistogramSnapshot) StdDev() float64 { return h.sample.StdDev() } - -// Sum returns the sum in the sample at the time the snapshot was taken. -func (h *HistogramSnapshot) Sum() int64 { return h.sample.Sum() } - -// Update panics. -func (*HistogramSnapshot) Update(int64) { - panic("Update called on a HistogramSnapshot") -} - -// Variance returns the variance of inputs at the time the snapshot was taken. -func (h *HistogramSnapshot) Variance() float64 { return h.sample.Variance() } - // NilHistogram is a no-op Histogram. type NilHistogram struct{} -// Clear is a no-op. -func (NilHistogram) Clear() {} - -// Count is a no-op. -func (NilHistogram) Count() int64 { return 0 } - -// Max is a no-op. -func (NilHistogram) Max() int64 { return 0 } - -// Mean is a no-op. -func (NilHistogram) Mean() float64 { return 0.0 } - -// Min is a no-op. -func (NilHistogram) Min() int64 { return 0 } - -// Percentile is a no-op. -func (NilHistogram) Percentile(p float64) float64 { return 0.0 } - -// Percentiles is a no-op. -func (NilHistogram) Percentiles(ps []float64) []float64 { - return make([]float64, len(ps)) -} - -// Sample is a no-op. -func (NilHistogram) Sample() Sample { return NilSample{} } - -// Snapshot is a no-op. -func (NilHistogram) Snapshot() Histogram { return NilHistogram{} } - -// StdDev is a no-op. -func (NilHistogram) StdDev() float64 { return 0.0 } - -// Sum is a no-op. -func (NilHistogram) Sum() int64 { return 0 } - -// Update is a no-op. -func (NilHistogram) Update(v int64) {} - -// Variance is a no-op. -func (NilHistogram) Variance() float64 { return 0.0 } +func (NilHistogram) Clear() {} +func (NilHistogram) Snapshot() HistogramSnapshot { return (*emptySnapshot)(nil) } +func (NilHistogram) Update(v int64) {} // StandardHistogram is the standard implementation of a Histogram and uses a // Sample to bound its memory use. @@ -166,46 +64,10 @@ type StandardHistogram struct { // Clear clears the histogram and its sample. func (h *StandardHistogram) Clear() { h.sample.Clear() } -// Count returns the number of samples recorded since the histogram was last -// cleared. -func (h *StandardHistogram) Count() int64 { return h.sample.Count() } - -// Max returns the maximum value in the sample. -func (h *StandardHistogram) Max() int64 { return h.sample.Max() } - -// Mean returns the mean of the values in the sample. -func (h *StandardHistogram) Mean() float64 { return h.sample.Mean() } - -// Min returns the minimum value in the sample. -func (h *StandardHistogram) Min() int64 { return h.sample.Min() } - -// Percentile returns an arbitrary percentile of the values in the sample. -func (h *StandardHistogram) Percentile(p float64) float64 { - return h.sample.Percentile(p) -} - -// Percentiles returns a slice of arbitrary percentiles of the values in the -// sample. -func (h *StandardHistogram) Percentiles(ps []float64) []float64 { - return h.sample.Percentiles(ps) -} - -// Sample returns the Sample underlying the histogram. -func (h *StandardHistogram) Sample() Sample { return h.sample } - // Snapshot returns a read-only copy of the histogram. -func (h *StandardHistogram) Snapshot() Histogram { - return &HistogramSnapshot{sample: h.sample.Snapshot().(*SampleSnapshot)} +func (h *StandardHistogram) Snapshot() HistogramSnapshot { + return h.sample.Snapshot() } -// StdDev returns the standard deviation of the values in the sample. -func (h *StandardHistogram) StdDev() float64 { return h.sample.StdDev() } - -// Sum returns the sum in the sample. -func (h *StandardHistogram) Sum() int64 { return h.sample.Sum() } - // Update samples a new value. func (h *StandardHistogram) Update(v int64) { h.sample.Update(v) } - -// Variance returns the variance of the values in the sample. -func (h *StandardHistogram) Variance() float64 { return h.sample.Variance() } diff --git a/metrics/histogram_test.go b/metrics/histogram_test.go index 7c9f42fcec..22fc5468b0 100644 --- a/metrics/histogram_test.go +++ b/metrics/histogram_test.go @@ -14,7 +14,7 @@ func TestGetOrRegisterHistogram(t *testing.T) { r := NewRegistry() s := NewUniformSample(100) NewRegisteredHistogram("foo", r, s).Update(47) - if h := GetOrRegisterHistogram("foo", r, s); h.Count() != 1 { + if h := GetOrRegisterHistogram("foo", r, s).Snapshot(); h.Count() != 1 { t.Fatal(h) } } @@ -24,11 +24,11 @@ func TestHistogram10000(t *testing.T) { for i := 1; i <= 10000; i++ { h.Update(int64(i)) } - testHistogram10000(t, h) + testHistogram10000(t, h.Snapshot()) } func TestHistogramEmpty(t *testing.T) { - h := NewHistogram(NewUniformSample(100)) + h := NewHistogram(NewUniformSample(100)).Snapshot() if count := h.Count(); count != 0 { t.Errorf("h.Count(): 0 != %v\n", count) } @@ -66,7 +66,7 @@ func TestHistogramSnapshot(t *testing.T) { testHistogram10000(t, snapshot) } -func testHistogram10000(t *testing.T, h Histogram) { +func testHistogram10000(t *testing.T, h HistogramSnapshot) { if count := h.Count(); count != 10000 { t.Errorf("h.Count(): 10000 != %v\n", count) } diff --git a/metrics/inactive.go b/metrics/inactive.go new file mode 100644 index 0000000000..77abf1599f --- /dev/null +++ b/metrics/inactive.go @@ -0,0 +1,48 @@ +// Copyright 2023 The CortexTheseus Authors +// This file is part of the CortexTheseus library. +// +// The CortexTheseus library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The CortexTheseus library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the CortexTheseus library. If not, see . + +package metrics + +// compile-time checks that interfaces are implemented. +var ( + _ SampleSnapshot = (*emptySnapshot)(nil) + _ HistogramSnapshot = (*emptySnapshot)(nil) + _ CounterSnapshot = (*emptySnapshot)(nil) + _ GaugeSnapshot = (*emptySnapshot)(nil) + _ MeterSnapshot = (*emptySnapshot)(nil) + _ EWMASnapshot = (*emptySnapshot)(nil) + _ TimerSnapshot = (*emptySnapshot)(nil) +) + +type emptySnapshot struct{} + +func (*emptySnapshot) Count() int64 { return 0 } +func (*emptySnapshot) Max() int64 { return 0 } +func (*emptySnapshot) Mean() float64 { return 0.0 } +func (*emptySnapshot) Min() int64 { return 0 } +func (*emptySnapshot) Percentile(p float64) float64 { return 0.0 } +func (*emptySnapshot) Percentiles(ps []float64) []float64 { return make([]float64, len(ps)) } +func (*emptySnapshot) Size() int { return 0 } +func (*emptySnapshot) StdDev() float64 { return 0.0 } +func (*emptySnapshot) Sum() int64 { return 0 } +func (*emptySnapshot) Values() []int64 { return []int64{} } +func (*emptySnapshot) Variance() float64 { return 0.0 } +func (*emptySnapshot) Value() int64 { return 0 } +func (*emptySnapshot) Rate() float64 { return 0.0 } +func (*emptySnapshot) Rate1() float64 { return 0.0 } +func (*emptySnapshot) Rate5() float64 { return 0.0 } +func (*emptySnapshot) Rate15() float64 { return 0.0 } +func (*emptySnapshot) RateMean() float64 { return 0.0 } diff --git a/metrics/influxdb/influxdb.go b/metrics/influxdb/influxdb.go index 3e969d3dfd..ac75a187b6 100644 --- a/metrics/influxdb/influxdb.go +++ b/metrics/influxdb/influxdb.go @@ -11,13 +11,13 @@ func readMeter(namespace, name string, i interface{}) (string, map[string]interf case metrics.Counter: measurement := fmt.Sprintf("%s%s.count", namespace, name) fields := map[string]interface{}{ - "value": metric.Count(), + "value": metric.Snapshot().Count(), } return measurement, fields case metrics.CounterFloat64: measurement := fmt.Sprintf("%s%s.count", namespace, name) fields := map[string]interface{}{ - "value": metric.Count(), + "value": metric.Snapshot().Count(), } return measurement, fields case metrics.Gauge: @@ -99,20 +99,19 @@ func readMeter(namespace, name string, i interface{}) (string, map[string]interf return measurement, fields case metrics.ResettingTimer: t := metric.Snapshot() - if len(t.Values()) == 0 { + if t.Count() == 0 { break } - ps := t.Percentiles([]float64{50, 95, 99}) - val := t.Values() + ps := t.Percentiles([]float64{0.50, 0.95, 0.99}) measurement := fmt.Sprintf("%s%s.span", namespace, name) fields := map[string]interface{}{ - "count": len(val), - "max": val[len(val)-1], + "count": t.Count(), + "max": t.Max(), "mean": t.Mean(), - "min": val[0], - "p50": ps[0], - "p95": ps[1], - "p99": ps[2], + "min": t.Min(), + "p50": int(ps[0]), + "p95": int(ps[1]), + "p99": int(ps[2]), } return measurement, fields } diff --git a/metrics/influxdb/influxdb_test.go b/metrics/influxdb/influxdb_test.go index 40f0a4070f..9d2dd0d00b 100644 --- a/metrics/influxdb/influxdb_test.go +++ b/metrics/influxdb/influxdb_test.go @@ -96,7 +96,7 @@ func TestExampleV2(t *testing.T) { } if have != want { t.Errorf("\nhave:\n%v\nwant:\n%v\n", have, want) - t.Logf("have vs want:\n %v", findFirstDiffPos(have, want)) + t.Logf("have vs want:\n%v", findFirstDiffPos(have, want)) } } diff --git a/metrics/influxdb/testdata/influxdbv1.want b/metrics/influxdb/testdata/influxdbv1.want index 5efffb9595..9443faedc5 100644 --- a/metrics/influxdb/testdata/influxdbv1.want +++ b/metrics/influxdb/testdata/influxdbv1.want @@ -1,3 +1,5 @@ +goth.system/cpu/schedlatency.histogram count=5645i,max=41943040i,mean=1819544.0410983171,min=0i,p25=0,p50=0,p75=7168,p95=16777216,p99=29360128,p999=33554432,p9999=33554432,stddev=6393570.217198883,variance=40877740122252.57 978307200000000000 +goth.system/memory/pauses.histogram count=14i,max=229376i,mean=50066.28571428572,min=5120i,p25=10240,p50=32768,p75=57344,p95=196608,p99=196608,p999=196608,p9999=196608,stddev=54726.062410783874,variance=2994941906.9890113 978307200000000000 goth.test/counter.count value=12345 978307200000000000 goth.test/counter_float64.count value=54321.98 978307200000000000 goth.test/gauge.gauge value=23456i 978307200000000000 @@ -5,5 +7,5 @@ goth.test/gauge_float64.gauge value=34567.89 978307200000000000 goth.test/gauge_info.gauge value="{\"arch\":\"amd64\",\"commit\":\"7caa2d8163ae3132c1c2d6978c76610caee2d949\",\"os\":\"linux\",\"protocol_versions\":\"64 65 66\",\"version\":\"1.10.18-unstable\"}" 978307200000000000 goth.test/histogram.histogram count=3i,max=3i,mean=2,min=1i,p25=1,p50=2,p75=3,p95=3,p99=3,p999=3,p9999=3,stddev=0.816496580927726,variance=0.6666666666666666 978307200000000000 goth.test/meter.meter count=0i,m1=0,m15=0,m5=0,mean=0 978307200000000000 -goth.test/resetting_timer.span count=6i,max=120000000i,mean=30000000,min=10000000i,p50=12000000i,p95=120000000i,p99=120000000i 978307200000000000 +goth.test/resetting_timer.span count=6i,max=120000000i,mean=30000000,min=10000000i,p50=12500000i,p95=120000000i,p99=120000000i 978307200000000000 goth.test/timer.timer count=6i,m1=0,m15=0,m5=0,max=120000000i,mean=38333333.333333336,meanrate=0,min=20000000i,p50=22500000,p75=48000000,p95=120000000,p99=120000000,p999=120000000,p9999=120000000,stddev=36545253.529775314,variance=1335555555555555.2 978307200000000000 diff --git a/metrics/influxdb/testdata/influxdbv2.want b/metrics/influxdb/testdata/influxdbv2.want index 5efffb9595..9443faedc5 100644 --- a/metrics/influxdb/testdata/influxdbv2.want +++ b/metrics/influxdb/testdata/influxdbv2.want @@ -1,3 +1,5 @@ +goth.system/cpu/schedlatency.histogram count=5645i,max=41943040i,mean=1819544.0410983171,min=0i,p25=0,p50=0,p75=7168,p95=16777216,p99=29360128,p999=33554432,p9999=33554432,stddev=6393570.217198883,variance=40877740122252.57 978307200000000000 +goth.system/memory/pauses.histogram count=14i,max=229376i,mean=50066.28571428572,min=5120i,p25=10240,p50=32768,p75=57344,p95=196608,p99=196608,p999=196608,p9999=196608,stddev=54726.062410783874,variance=2994941906.9890113 978307200000000000 goth.test/counter.count value=12345 978307200000000000 goth.test/counter_float64.count value=54321.98 978307200000000000 goth.test/gauge.gauge value=23456i 978307200000000000 @@ -5,5 +7,5 @@ goth.test/gauge_float64.gauge value=34567.89 978307200000000000 goth.test/gauge_info.gauge value="{\"arch\":\"amd64\",\"commit\":\"7caa2d8163ae3132c1c2d6978c76610caee2d949\",\"os\":\"linux\",\"protocol_versions\":\"64 65 66\",\"version\":\"1.10.18-unstable\"}" 978307200000000000 goth.test/histogram.histogram count=3i,max=3i,mean=2,min=1i,p25=1,p50=2,p75=3,p95=3,p99=3,p999=3,p9999=3,stddev=0.816496580927726,variance=0.6666666666666666 978307200000000000 goth.test/meter.meter count=0i,m1=0,m15=0,m5=0,mean=0 978307200000000000 -goth.test/resetting_timer.span count=6i,max=120000000i,mean=30000000,min=10000000i,p50=12000000i,p95=120000000i,p99=120000000i 978307200000000000 +goth.test/resetting_timer.span count=6i,max=120000000i,mean=30000000,min=10000000i,p50=12500000i,p95=120000000i,p99=120000000i 978307200000000000 goth.test/timer.timer count=6i,m1=0,m15=0,m5=0,max=120000000i,mean=38333333.333333336,meanrate=0,min=20000000i,p50=22500000,p75=48000000,p95=120000000,p99=120000000,p999=120000000,p9999=120000000,stddev=36545253.529775314,variance=1335555555555555.2 978307200000000000 diff --git a/metrics/internal/sampledata.go b/metrics/internal/sampledata.go index 0d61ae8b6c..c1af5729b9 100644 --- a/metrics/internal/sampledata.go +++ b/metrics/internal/sampledata.go @@ -17,6 +17,9 @@ package internal import ( + "bytes" + "encoding/gob" + metrics2 "runtime/metrics" "time" "github.com/CortexFoundation/CortexTheseus/metrics" @@ -38,7 +41,15 @@ func ExampleMetrics() metrics.Registry { "commit": "7caa2d8163ae3132c1c2d6978c76610caee2d949", "protocol_versions": "64 65 66", }) - metrics.NewRegisteredHistogram("test/histogram", registry, metrics.NewSampleSnapshot(3, []int64{1, 2, 3})) + + { + s := metrics.NewUniformSample(3) + s.Update(1) + s.Update(2) + s.Update(3) + //metrics.NewRegisteredHistogram("test/histogram", registry, metrics.NewSampleSnapshot(3, []int64{1, 2, 3})) + metrics.NewRegisteredHistogram("test/histogram", registry, s) + } registry.Register("test/meter", metrics.NewInactiveMeter()) { timer := metrics.NewRegisteredResettingTimer("test/resetting_timer", registry) @@ -60,5 +71,25 @@ func ExampleMetrics() metrics.Registry { timer.Stop() } registry.Register("test/empty_resetting_timer", metrics.NewResettingTimer().Snapshot()) + + { // go runtime metrics + var sLatency = "7\xff\x81\x03\x01\x01\x10Float64Histogram\x01\xff\x82\x00\x01\x02\x01\x06Counts\x01\xff\x84\x00\x01\aBuckets\x01\xff\x86\x00\x00\x00\x16\xff\x83\x02\x01\x01\b[]uint64\x01\xff\x84\x00\x01\x06\x00\x00\x17\xff\x85\x02\x01\x01\t[]float64\x01\xff\x86\x00\x01\b\x00\x00\xfe\x06T\xff\x82\x01\xff\xa2\x00\xfe\r\xef\x00\x01\x02\x02\x04\x05\x04\b\x15\x17 B?6.L;$!2) \x1a? 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+ var gcPauses = "7\xff\x81\x03\x01\x01\x10Float64Histogram\x01\xff\x82\x00\x01\x02\x01\x06Counts\x01\xff\x84\x00\x01\aBuckets\x01\xff\x86\x00\x00\x00\x16\xff\x83\x02\x01\x01\b[]uint64\x01\xff\x84\x00\x01\x06\x00\x00\x17\xff\x85\x02\x01\x01\t[]float64\x01\xff\x86\x00\x01\b\x00\x00\xfe\x06R\xff\x82\x01\xff\xa2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x01\x01\x00\x01\x00\x00\x00\x01\x01\x01\x01\x01\x01\x01\x00\x02\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\xa3\xfe\xf0\xff\x00\xf8\x95\xd6&\xe8\v.q>\xf8\x95\xd6&\xe8\v.\x81>\xf8\xdfA:\xdc\x11ʼn>\xf8\x95\xd6&\xe8\v.\x91>\xf8:\x8c0\xe2\x8ey\x95>\xf8\xdfA:\xdc\x11ř>\xf8\x84\xf7C֔\x10\x9e>\xf8\x95\xd6&\xe8\v.\xa1>\xf8:\x8c0\xe2\x8ey\xa5>\xf8\xdfA:\xdc\x11ũ>\xf8\x84\xf7C֔\x10\xae>\xf8\x95\xd6&\xe8\v.\xb1>\xf8:\x8c0\xe2\x8ey\xb5>\xf8\xdfA:\xdc\x11Ź>\xf8\x84\xf7C֔\x10\xbe>\xf8\x95\xd6&\xe8\v.\xc1>\xf8:\x8c0\xe2\x8ey\xc5>\xf8\xdfA:\xdc\x11\xc5\xc9>\xf8\x84\xf7C֔\x10\xce>\xf8\x95\xd6&\xe8\v.\xd1>\xf8:\x8c0\xe2\x8ey\xd5>\xf8\xdfA:\xdc\x11\xc5\xd9>\xf8\x84\xf7C֔\x10\xde>\xf8\x95\xd6&\xe8\v.\xe1>\xf8:\x8c0\xe2\x8ey\xe5>\xf8\xdfA:\xdc\x11\xc5\xe9>\xf8\x84\xf7C֔\x10\xee>\xf8\x95\xd6&\xe8\v.\xf1>\xf8:\x8c0\xe2\x8ey\xf5>\xf8\xdfA:\xdc\x11\xc5\xf9>\xf8\x84\xf7C֔\x10\xfe>\xf8\x95\xd6&\xe8\v.\x01?\xf8:\x8c0\xe2\x8ey\x05?\xf8\xdfA:\xdc\x11\xc5\t?\xf8\x84\xf7C֔\x10\x0e?\xf8\x95\xd6&\xe8\v.\x11?\xf8:\x8c0\xe2\x8ey\x15?\xf8\xdfA:\xdc\x11\xc5\x19?\xf8\x84\xf7C֔\x10\x1e?\xf8\x95\xd6&\xe8\v.!?\xf8:\x8c0\xe2\x8ey%?\xf8\xdfA:\xdc\x11\xc5)?\xf8\x84\xf7C֔\x10.?\xf8\x95\xd6&\xe8\v.1?\xf8:\x8c0\xe2\x8ey5?\xf8\xdfA:\xdc\x11\xc59?\xf8\x84\xf7C֔\x10>?\xf8\x95\xd6&\xe8\v.A?\xf8:\x8c0\xe2\x8eyE?\xf8\xdfA:\xdc\x11\xc5I?\xf8\x84\xf7C֔\x10N?\xf8\x95\xd6&\xe8\v.Q?\xf8:\x8c0\xe2\x8eyU?\xf8\xdfA:\xdc\x11\xc5Y?\xf8\x84\xf7C֔\x10^?\xf8\x95\xd6&\xe8\v.a?\xf8:\x8c0\xe2\x8eye?\xf8\xdfA:\xdc\x11\xc5i?\xf8\x84\xf7C֔\x10n?\xf8\x95\xd6&\xe8\v.q?\xf8:\x8c0\xe2\x8eyu?\xf8\xdfA:\xdc\x11\xc5y?\xf8\x84\xf7C֔\x10~?\xf8\x95\xd6&\xe8\v.\x81?\xf8:\x8c0\xe2\x8ey\x85?\xf8\xdfA:\xdc\x11ʼn?\xf8\x84\xf7C֔\x10\x8e?\xf8\x95\xd6&\xe8\v.\x91?\xf8:\x8c0\xe2\x8ey\x95?\xf8\xdfA:\xdc\x11ř?\xf8\x84\xf7C֔\x10\x9e?\xf8\x95\xd6&\xe8\v.\xa1?\xf8:\x8c0\xe2\x8ey\xa5?\xf8\xdfA:\xdc\x11ũ?\xf8\x84\xf7C֔\x10\xae?\xf8\x95\xd6&\xe8\v.\xb1?\xf8:\x8c0\xe2\x8ey\xb5?\xf8\xdfA:\xdc\x11Ź?\xf8\x84\xf7C֔\x10\xbe?\xf8\x95\xd6&\xe8\v.\xc1?\xf8:\x8c0\xe2\x8ey\xc5?\xf8\xdfA:\xdc\x11\xc5\xc9?\xf8\x84\xf7C֔\x10\xce?\xf8\x95\xd6&\xe8\v.\xd1?\xf8:\x8c0\xe2\x8ey\xd5?\xf8\xdfA:\xdc\x11\xc5\xd9?\xf8\x84\xf7C֔\x10\xde?\xf8\x95\xd6&\xe8\v.\xe1?\xf8:\x8c0\xe2\x8ey\xe5?\xf8\xdfA:\xdc\x11\xc5\xe9?\xf8\x84\xf7C֔\x10\xee?\xf8\x95\xd6&\xe8\v.\xf1?\xf8:\x8c0\xe2\x8ey\xf5?\xf8\xdfA:\xdc\x11\xc5\xf9?\xf8\x84\xf7C֔\x10\xfe?\xf8\x95\xd6&\xe8\v.\x01@\xf8:\x8c0\xe2\x8ey\x05@\xf8\xdfA:\xdc\x11\xc5\t@\xf8\x84\xf7C֔\x10\x0e@\xf8\x95\xd6&\xe8\v.\x11@\xf8:\x8c0\xe2\x8ey\x15@\xf8\xdfA:\xdc\x11\xc5\x19@\xf8\x84\xf7C֔\x10\x1e@\xf8\x95\xd6&\xe8\v.!@\xf8:\x8c0\xe2\x8ey%@\xf8\xdfA:\xdc\x11\xc5)@\xf8\x84\xf7C֔\x10.@\xf8\x95\xd6&\xe8\v.1@\xf8:\x8c0\xe2\x8ey5@\xf8\xdfA:\xdc\x11\xc59@\xf8\x84\xf7C֔\x10>@\xf8\x95\xd6&\xe8\v.A@\xf8:\x8c0\xe2\x8eyE@\xf8\xdfA:\xdc\x11\xc5I@\xf8\x84\xf7C֔\x10N@\xf8\x95\xd6&\xe8\v.Q@\xf8:\x8c0\xe2\x8eyU@\xf8\xdfA:\xdc\x11\xc5Y@\xf8\x84\xf7C֔\x10^@\xf8\x95\xd6&\xe8\v.a@\xf8:\x8c0\xe2\x8eye@\xf8\xdfA:\xdc\x11\xc5i@\xf8\x84\xf7C֔\x10n@\xf8\x95\xd6&\xe8\v.q@\xf8:\x8c0\xe2\x8eyu@\xf8\xdfA:\xdc\x11\xc5y@\xf8\x84\xf7C֔\x10~@\xf8\x95\xd6&\xe8\v.\x81@\xf8:\x8c0\xe2\x8ey\x85@\xf8\xdfA:\xdc\x11ʼn@\xf8\x84\xf7C֔\x10\x8e@\xf8\x95\xd6&\xe8\v.\x91@\xf8:\x8c0\xe2\x8ey\x95@\xf8\xdfA:\xdc\x11ř@\xf8\x84\xf7C֔\x10\x9e@\xf8\x95\xd6&\xe8\v.\xa1@\xf8:\x8c0\xe2\x8ey\xa5@\xf8\xdfA:\xdc\x11ũ@\xf8\x84\xf7C֔\x10\xae@\xf8\x95\xd6&\xe8\v.\xb1@\xf8:\x8c0\xe2\x8ey\xb5@\xf8\xdfA:\xdc\x11Ź@\xf8\x84\xf7C֔\x10\xbe@\xf8\x95\xd6&\xe8\v.\xc1@\xf8:\x8c0\xe2\x8ey\xc5@\xf8\xdfA:\xdc\x11\xc5\xc9@\xf8\x84\xf7C֔\x10\xce@\xf8\x95\xd6&\xe8\v.\xd1@\xf8:\x8c0\xe2\x8ey\xd5@\xf8\xdfA:\xdc\x11\xc5\xd9@\xf8\x84\xf7C֔\x10\xde@\xf8\x95\xd6&\xe8\v.\xe1@\xf8:\x8c0\xe2\x8ey\xe5@\xf8\xdfA:\xdc\x11\xc5\xe9@\xf8\x84\xf7C֔\x10\xee@\xf8\x95\xd6&\xe8\v.\xf1@\xf8:\x8c0\xe2\x8ey\xf5@\xf8\xdfA:\xdc\x11\xc5\xf9@\xf8\x84\xf7C֔\x10\xfe@\xf8\x95\xd6&\xe8\v.\x01A\xfe\xf0\x7f\x00" + + var secondsToNs = float64(time.Second) + + dserialize := func(data string) *metrics2.Float64Histogram { + var res metrics2.Float64Histogram + if err := gob.NewDecoder(bytes.NewReader([]byte(data))).Decode(&res); err != nil { + panic(err) + } + return &res + } + cpuSchedLatency := metrics.RuntimeHistogramFromData(secondsToNs, dserialize(sLatency)) + registry.Register("system/cpu/schedlatency", cpuSchedLatency) + + memPauses := metrics.RuntimeHistogramFromData(secondsToNs, dserialize(gcPauses)) + registry.Register("system/memory/pauses", memPauses) + } return registry } diff --git a/metrics/internal/sampledata_test.go b/metrics/internal/sampledata_test.go new file mode 100644 index 0000000000..8d0ee7dd2a --- /dev/null +++ b/metrics/internal/sampledata_test.go @@ -0,0 +1,27 @@ +package internal + +import ( + "bytes" + "encoding/gob" + "fmt" + metrics2 "runtime/metrics" + "testing" + "time" + + "github.com/CortexFoundation/CortexTheseus/metrics" +) + +func TestCollectRuntimeMetrics(t *testing.T) { + t.Skip("Only used for generating testdata") + serialize := func(path string, histogram *metrics2.Float64Histogram) { + var f = new(bytes.Buffer) + if err := gob.NewEncoder(f).Encode(histogram); err != nil { + panic(err) + } + fmt.Printf("var %v = %q\n", path, f.Bytes()) + } + time.Sleep(2 * time.Second) + stats := metrics.ReadRuntimeStats() + serialize("schedlatency", stats.SchedLatency) + serialize("gcpauses", stats.GCPauses) +} diff --git a/metrics/librato/librato.go b/metrics/librato/librato.go index c506544680..280901a9f1 100644 --- a/metrics/librato/librato.go +++ b/metrics/librato/librato.go @@ -61,16 +61,16 @@ func (rep *Reporter) Run() { // calculate sum of squares from data provided by metrics.Histogram // see http://en.wikipedia.org/wiki/Standard_deviation#Rapid_calculation_methods -func sumSquares(s metrics.Sample) float64 { - count := float64(s.Count()) - sumSquared := math.Pow(count*s.Mean(), 2) - sumSquares := math.Pow(count*s.StdDev(), 2) + sumSquared/count +func sumSquares(icount int64, mean, stDev float64) float64 { + count := float64(icount) + sumSquared := math.Pow(count*mean, 2) + sumSquares := math.Pow(count*stDev, 2) + sumSquared/count if math.IsNaN(sumSquares) { return 0.0 } return sumSquares } -func sumSquaresTimer(t metrics.Timer) float64 { +func sumSquaresTimer(t metrics.TimerSnapshot) float64 { count := float64(t.Count()) sumSquared := math.Pow(count*t.Mean(), 2) sumSquares := math.Pow(count*t.StdDev(), 2) + sumSquared/count @@ -97,9 +97,10 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B measurement[Period] = rep.Interval.Seconds() switch m := metric.(type) { case metrics.Counter: - if m.Count() > 0 { + ms := m.Snapshot() + if ms.Count() > 0 { measurement[Name] = fmt.Sprintf("%s.%s", name, "count") - measurement[Value] = float64(m.Count()) + measurement[Value] = float64(ms.Count()) measurement[Attributes] = map[string]interface{}{ DisplayUnitsLong: Operations, DisplayUnitsShort: OperationsShort, @@ -108,9 +109,9 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B snapshot.Counters = append(snapshot.Counters, measurement) } case metrics.CounterFloat64: - if m.Count() > 0 { + if count := m.Snapshot().Count(); count > 0 { measurement[Name] = fmt.Sprintf("%s.%s", name, "count") - measurement[Value] = m.Count() + measurement[Value] = count measurement[Attributes] = map[string]interface{}{ DisplayUnitsLong: Operations, DisplayUnitsShort: OperationsShort, @@ -120,44 +121,45 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B } case metrics.Gauge: measurement[Name] = name - measurement[Value] = float64(m.Value()) + measurement[Value] = float64(m.Snapshot().Value()) snapshot.Gauges = append(snapshot.Gauges, measurement) case metrics.GaugeFloat64: measurement[Name] = name - measurement[Value] = m.Value() + measurement[Value] = m.Snapshot().Value() snapshot.Gauges = append(snapshot.Gauges, measurement) case metrics.GaugeInfo: measurement[Name] = name - measurement[Value] = m.Value() + measurement[Value] = m.Snapshot().Value() snapshot.Gauges = append(snapshot.Gauges, measurement) case metrics.Histogram: - if m.Count() > 0 { + ms := m.Snapshot() + if ms.Count() > 0 { gauges := make([]Measurement, histogramGaugeCount) - s := m.Sample() measurement[Name] = fmt.Sprintf("%s.%s", name, "hist") - measurement[Count] = uint64(s.Count()) - measurement[Max] = float64(s.Max()) - measurement[Min] = float64(s.Min()) - measurement[Sum] = float64(s.Sum()) - measurement[SumSquares] = sumSquares(s) + measurement[Count] = uint64(ms.Count()) + measurement[Max] = float64(ms.Max()) + measurement[Min] = float64(ms.Min()) + measurement[Sum] = float64(ms.Sum()) + measurement[SumSquares] = sumSquares(ms.Count(), ms.Mean(), ms.StdDev()) gauges[0] = measurement for i, p := range rep.Percentiles { gauges[i+1] = Measurement{ Name: fmt.Sprintf("%s.%.2f", measurement[Name], p), - Value: s.Percentile(p), + Value: ms.Percentile(p), Period: measurement[Period], } } snapshot.Gauges = append(snapshot.Gauges, gauges...) } case metrics.Meter: + ms := m.Snapshot() measurement[Name] = name - measurement[Value] = float64(m.Count()) + measurement[Value] = float64(ms.Count()) snapshot.Counters = append(snapshot.Counters, measurement) snapshot.Gauges = append(snapshot.Gauges, Measurement{ Name: fmt.Sprintf("%s.%s", name, "1min"), - Value: m.Rate1(), + Value: ms.Rate1(), Period: int64(rep.Interval.Seconds()), Attributes: map[string]interface{}{ DisplayUnitsLong: Operations, @@ -167,7 +169,7 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B }, Measurement{ Name: fmt.Sprintf("%s.%s", name, "5min"), - Value: m.Rate5(), + Value: ms.Rate5(), Period: int64(rep.Interval.Seconds()), Attributes: map[string]interface{}{ DisplayUnitsLong: Operations, @@ -177,7 +179,7 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B }, Measurement{ Name: fmt.Sprintf("%s.%s", name, "15min"), - Value: m.Rate15(), + Value: ms.Rate15(), Period: int64(rep.Interval.Seconds()), Attributes: map[string]interface{}{ DisplayUnitsLong: Operations, @@ -187,26 +189,27 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B }, ) case metrics.Timer: + ms := m.Snapshot() measurement[Name] = name - measurement[Value] = float64(m.Count()) + measurement[Value] = float64(ms.Count()) snapshot.Counters = append(snapshot.Counters, measurement) - if m.Count() > 0 { + if ms.Count() > 0 { libratoName := fmt.Sprintf("%s.%s", name, "timer.mean") gauges := make([]Measurement, histogramGaugeCount) gauges[0] = Measurement{ Name: libratoName, - Count: uint64(m.Count()), - Sum: m.Mean() * float64(m.Count()), - Max: float64(m.Max()), - Min: float64(m.Min()), - SumSquares: sumSquaresTimer(m), + Count: uint64(ms.Count()), + Sum: ms.Mean() * float64(ms.Count()), + Max: float64(ms.Max()), + Min: float64(ms.Min()), + SumSquares: sumSquaresTimer(ms), Period: int64(rep.Interval.Seconds()), Attributes: rep.TimerAttributes, } for i, p := range rep.Percentiles { gauges[i+1] = Measurement{ Name: fmt.Sprintf("%s.timer.%2.0f", name, p*100), - Value: m.Percentile(p), + Value: ms.Percentile(p), Period: int64(rep.Interval.Seconds()), Attributes: rep.TimerAttributes, } @@ -215,7 +218,7 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B snapshot.Gauges = append(snapshot.Gauges, Measurement{ Name: fmt.Sprintf("%s.%s", name, "rate.1min"), - Value: m.Rate1(), + Value: ms.Rate1(), Period: int64(rep.Interval.Seconds()), Attributes: map[string]interface{}{ DisplayUnitsLong: Operations, @@ -225,7 +228,7 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B }, Measurement{ Name: fmt.Sprintf("%s.%s", name, "rate.5min"), - Value: m.Rate5(), + Value: ms.Rate5(), Period: int64(rep.Interval.Seconds()), Attributes: map[string]interface{}{ DisplayUnitsLong: Operations, @@ -235,7 +238,7 @@ func (rep *Reporter) BuildRequest(now time.Time, r metrics.Registry) (snapshot B }, Measurement{ Name: fmt.Sprintf("%s.%s", name, "rate.15min"), - Value: m.Rate15(), + Value: ms.Rate15(), Period: int64(rep.Interval.Seconds()), Attributes: map[string]interface{}{ DisplayUnitsLong: Operations, diff --git a/metrics/log.go b/metrics/log.go index d71a1c3d9c..3b9773faa7 100644 --- a/metrics/log.go +++ b/metrics/log.go @@ -23,19 +23,19 @@ func LogScaled(r Registry, freq time.Duration, scale time.Duration, l Logger) { switch metric := i.(type) { case Counter: l.Printf("counter %s\n", name) - l.Printf(" count: %9d\n", metric.Count()) + l.Printf(" count: %9d\n", metric.Snapshot().Count()) case CounterFloat64: l.Printf("counter %s\n", name) - l.Printf(" count: %f\n", metric.Count()) + l.Printf(" count: %f\n", metric.Snapshot().Count()) case Gauge: l.Printf("gauge %s\n", name) - l.Printf(" value: %9d\n", metric.Value()) + l.Printf(" value: %9d\n", metric.Snapshot().Value()) case GaugeFloat64: l.Printf("gauge %s\n", name) - l.Printf(" value: %f\n", metric.Value()) + l.Printf(" value: %f\n", metric.Snapshot().Value()) case GaugeInfo: l.Printf("gauge %s\n", name) - l.Printf(" value: %s\n", metric.Value()) + l.Printf(" value: %s\n", metric.Snapshot().Value()) case Healthcheck: metric.Check() l.Printf("healthcheck %s\n", name) diff --git a/metrics/meter.go b/metrics/meter.go index 8a89dc4275..22475ef6eb 100644 --- a/metrics/meter.go +++ b/metrics/meter.go @@ -1,21 +1,25 @@ package metrics import ( + "math" "sync" "sync/atomic" "time" ) -// Meters count events to produce exponentially-weighted moving average rates -// at one-, five-, and fifteen-minutes and a mean rate. -type Meter interface { +type MeterSnapshot interface { Count() int64 - Mark(int64) Rate1() float64 Rate5() float64 Rate15() float64 RateMean() float64 - Snapshot() Meter +} + +// Meters count events to produce exponentially-weighted moving average rates +// at one-, five-, and fifteen-minutes and a mean rate. +type Meter interface { + Mark(int64) + Snapshot() MeterSnapshot Stop() } @@ -30,17 +34,6 @@ func GetOrRegisterMeter(name string, r Registry) Meter { return r.GetOrRegister(name, NewMeter).(Meter) } -// GetOrRegisterMeterForced returns an existing Meter or constructs and registers a -// new StandardMeter no matter the global switch is enabled or not. -// Be sure to unregister the meter from the registry once it is of no use to -// allow for garbage collection. -func GetOrRegisterMeterForced(name string, r Registry) Meter { - if nil == r { - r = DefaultRegistry - } - return r.GetOrRegister(name, NewMeterForced).(Meter) -} - // NewMeter constructs a new StandardMeter and launches a goroutine. // Be sure to call Stop() once the meter is of no use to allow for garbage collection. func NewMeter() Meter { @@ -68,115 +61,53 @@ func NewInactiveMeter() Meter { return m } -// NewMeterForced constructs a new StandardMeter and launches a goroutine no matter -// the global switch is enabled or not. -// Be sure to call Stop() once the meter is of no use to allow for garbage collection. -func NewMeterForced() Meter { - m := newStandardMeter() - arbiter.Lock() - defer arbiter.Unlock() - arbiter.meters[m] = struct{}{} - if !arbiter.started { - arbiter.started = true - go arbiter.tick() - } - return m -} - // NewRegisteredMeter constructs and registers a new StandardMeter // and launches a goroutine. // Be sure to unregister the meter from the registry once it is of no use to // allow for garbage collection. func NewRegisteredMeter(name string, r Registry) Meter { - c := NewMeter() - if nil == r { - r = DefaultRegistry - } - r.Register(name, c) - return c + return GetOrRegisterMeter(name, r) } -// NewRegisteredMeterForced constructs and registers a new StandardMeter -// and launches a goroutine no matter the global switch is enabled or not. -// Be sure to unregister the meter from the registry once it is of no use to -// allow for garbage collection. -func NewRegisteredMeterForced(name string, r Registry) Meter { - c := NewMeterForced() - if nil == r { - r = DefaultRegistry - } - r.Register(name, c) - return c -} - -// MeterSnapshot is a read-only copy of another Meter. -type MeterSnapshot struct { - temp atomic.Int64 +// meterSnapshot is a read-only copy of the meter's internal values. +type meterSnapshot struct { count int64 rate1, rate5, rate15, rateMean float64 } // Count returns the count of events at the time the snapshot was taken. -func (m *MeterSnapshot) Count() int64 { return m.count } - -// Mark panics. -func (*MeterSnapshot) Mark(n int64) { - panic("Mark called on a MeterSnapshot") -} +func (m *meterSnapshot) Count() int64 { return m.count } // Rate1 returns the one-minute moving average rate of events per second at the // time the snapshot was taken. -func (m *MeterSnapshot) Rate1() float64 { return m.rate1 } +func (m *meterSnapshot) Rate1() float64 { return m.rate1 } // Rate5 returns the five-minute moving average rate of events per second at // the time the snapshot was taken. -func (m *MeterSnapshot) Rate5() float64 { return m.rate5 } +func (m *meterSnapshot) Rate5() float64 { return m.rate5 } // Rate15 returns the fifteen-minute moving average rate of events per second // at the time the snapshot was taken. -func (m *MeterSnapshot) Rate15() float64 { return m.rate15 } +func (m *meterSnapshot) Rate15() float64 { return m.rate15 } // RateMean returns the meter's mean rate of events per second at the time the // snapshot was taken. -func (m *MeterSnapshot) RateMean() float64 { return m.rateMean } - -// Snapshot returns the snapshot. -func (m *MeterSnapshot) Snapshot() Meter { return m } - -// Stop is a no-op. -func (m *MeterSnapshot) Stop() {} +func (m *meterSnapshot) RateMean() float64 { return m.rateMean } // NilMeter is a no-op Meter. type NilMeter struct{} -// Count is a no-op. -func (NilMeter) Count() int64 { return 0 } - -// Mark is a no-op. -func (NilMeter) Mark(n int64) {} - -// Rate1 is a no-op. -func (NilMeter) Rate1() float64 { return 0.0 } - -// Rate5 is a no-op. -func (NilMeter) Rate5() float64 { return 0.0 } - -// Rate15 is a no-op. -func (NilMeter) Rate15() float64 { return 0.0 } - -// RateMean is a no-op. -func (NilMeter) RateMean() float64 { return 0.0 } - -// Snapshot is a no-op. -func (NilMeter) Snapshot() Meter { return NilMeter{} } - -// Stop is a no-op. -func (NilMeter) Stop() {} +func (NilMeter) Count() int64 { return 0 } +func (NilMeter) Mark(n int64) {} +func (NilMeter) Snapshot() MeterSnapshot { return (*emptySnapshot)(nil) } +func (NilMeter) Stop() {} // StandardMeter is the standard implementation of a Meter. type StandardMeter struct { - lock sync.RWMutex - snapshot *MeterSnapshot + count atomic.Int64 + uncounted atomic.Int64 // not yet added to the EWMAs + rateMean atomic.Uint64 + a1, a5, a15 EWMA startTime time.Time stopped atomic.Bool @@ -184,7 +115,6 @@ type StandardMeter struct { func newStandardMeter() *StandardMeter { return &StandardMeter{ - snapshot: &MeterSnapshot{}, a1: NewEWMA1(), a5: NewEWMA5(), a15: NewEWMA15(), @@ -194,97 +124,42 @@ func newStandardMeter() *StandardMeter { // Stop stops the meter, Mark() will be a no-op if you use it after being stopped. func (m *StandardMeter) Stop() { - stopped := m.stopped.Swap(true) - if !stopped { + if stopped := m.stopped.Swap(true); !stopped { arbiter.Lock() delete(arbiter.meters, m) arbiter.Unlock() } } -// Count returns the number of events recorded. -// It updates the meter to be as accurate as possible -func (m *StandardMeter) Count() int64 { - m.lock.Lock() - defer m.lock.Unlock() - m.updateMeter() - return m.snapshot.count -} - // Mark records the occurrence of n events. func (m *StandardMeter) Mark(n int64) { - m.snapshot.temp.Add(n) -} - -// Rate1 returns the one-minute moving average rate of events per second. -func (m *StandardMeter) Rate1() float64 { - m.lock.RLock() - defer m.lock.RUnlock() - return m.snapshot.rate1 -} - -// Rate5 returns the five-minute moving average rate of events per second. -func (m *StandardMeter) Rate5() float64 { - m.lock.RLock() - defer m.lock.RUnlock() - return m.snapshot.rate5 -} - -// Rate15 returns the fifteen-minute moving average rate of events per second. -func (m *StandardMeter) Rate15() float64 { - m.lock.RLock() - defer m.lock.RUnlock() - return m.snapshot.rate15 -} - -// RateMean returns the meter's mean rate of events per second. -func (m *StandardMeter) RateMean() float64 { - m.lock.RLock() - defer m.lock.RUnlock() - return m.snapshot.rateMean + m.uncounted.Add(n) } // Snapshot returns a read-only copy of the meter. -func (m *StandardMeter) Snapshot() Meter { - m.lock.RLock() - snapshot := MeterSnapshot{ - count: m.snapshot.count, - rate1: m.snapshot.rate1, - rate5: m.snapshot.rate5, - rate15: m.snapshot.rate15, - rateMean: m.snapshot.rateMean, +func (m *StandardMeter) Snapshot() MeterSnapshot { + return &meterSnapshot{ + count: m.count.Load() + m.uncounted.Load(), + rate1: m.a1.Snapshot().Rate(), + rate5: m.a5.Snapshot().Rate(), + rate15: m.a15.Snapshot().Rate(), + rateMean: math.Float64frombits(m.rateMean.Load()), } - snapshot.temp.Store(m.snapshot.temp.Load()) - m.lock.RUnlock() - return &snapshot -} - -func (m *StandardMeter) updateSnapshot() { - // should run with write lock held on m.lock - snapshot := m.snapshot - snapshot.rate1 = m.a1.Rate() - snapshot.rate5 = m.a5.Rate() - snapshot.rate15 = m.a15.Rate() - snapshot.rateMean = float64(snapshot.count) / time.Since(m.startTime).Seconds() } -func (m *StandardMeter) updateMeter() { - // should only run with write lock held on m.lock - n := m.snapshot.temp.Swap(0) - m.snapshot.count += n +func (m *StandardMeter) tick() { + // Take the uncounted values, add to count + n := m.uncounted.Swap(0) + count := m.count.Add(n) + m.rateMean.Store(math.Float64bits(float64(count) / time.Since(m.startTime).Seconds())) + // Update the EWMA's internal state m.a1.Update(n) m.a5.Update(n) m.a15.Update(n) -} - -func (m *StandardMeter) tick() { - m.lock.Lock() - defer m.lock.Unlock() - m.updateMeter() + // And trigger them to calculate the rates m.a1.Tick() m.a5.Tick() m.a15.Tick() - m.updateSnapshot() } // meterArbiter ticks meters every 5s from a single goroutine. diff --git a/metrics/meter_test.go b/metrics/meter_test.go index b3f6cb8c0c..019c4d765b 100644 --- a/metrics/meter_test.go +++ b/metrics/meter_test.go @@ -12,11 +12,17 @@ func BenchmarkMeter(b *testing.B) { m.Mark(1) } } - +func TestMeter(t *testing.T) { + m := NewMeter() + m.Mark(47) + if v := m.Snapshot().Count(); v != 47 { + t.Fatalf("have %d want %d", v, 47) + } +} func TestGetOrRegisterMeter(t *testing.T) { r := NewRegistry() NewRegisteredMeter("foo", r).Mark(47) - if m := GetOrRegisterMeter("foo", r); m.Count() != 47 { + if m := GetOrRegisterMeter("foo", r).Snapshot(); m.Count() != 47 { t.Fatal(m.Count()) } } @@ -31,10 +37,10 @@ func TestMeterDecay(t *testing.T) { ma.meters[m] = struct{}{} m.Mark(1) ma.tickMeters() - rateMean := m.RateMean() + rateMean := m.Snapshot().RateMean() time.Sleep(100 * time.Millisecond) ma.tickMeters() - if m.RateMean() >= rateMean { + if m.Snapshot().RateMean() >= rateMean { t.Error("m.RateMean() didn't decrease") } } @@ -42,7 +48,7 @@ func TestMeterDecay(t *testing.T) { func TestMeterNonzero(t *testing.T) { m := NewMeter() m.Mark(3) - if count := m.Count(); count != 3 { + if count := m.Snapshot().Count(); count != 3 { t.Errorf("m.Count(): 3 != %v\n", count) } } @@ -59,16 +65,8 @@ func TestMeterStop(t *testing.T) { } } -func TestMeterSnapshot(t *testing.T) { - m := NewMeter() - m.Mark(1) - if snapshot := m.Snapshot(); m.RateMean() != snapshot.RateMean() { - t.Fatal(snapshot) - } -} - func TestMeterZero(t *testing.T) { - m := NewMeter() + m := NewMeter().Snapshot() if count := m.Count(); count != 0 { t.Errorf("m.Count(): 0 != %v\n", count) } @@ -79,13 +77,13 @@ func TestMeterRepeat(t *testing.T) { for i := 0; i < 101; i++ { m.Mark(int64(i)) } - if count := m.Count(); count != 5050 { + if count := m.Snapshot().Count(); count != 5050 { t.Errorf("m.Count(): 5050 != %v\n", count) } for i := 0; i < 101; i++ { m.Mark(int64(i)) } - if count := m.Count(); count != 10100 { + if count := m.Snapshot().Count(); count != 10100 { t.Errorf("m.Count(): 10100 != %v\n", count) } } diff --git a/metrics/metrics.go b/metrics/metrics.go index ec432d9dab..e5c80ac0dd 100644 --- a/metrics/metrics.go +++ b/metrics/metrics.go @@ -85,6 +85,12 @@ var runtimeSamples = []metrics.Sample{ {Name: "/sched/latencies:seconds"}, // histogram } +func ReadRuntimeStats() *runtimeStats { + r := new(runtimeStats) + readRuntimeStats(r) + return r +} + func readRuntimeStats(v *runtimeStats) { metrics.Read(runtimeSamples) for _, s := range runtimeSamples { diff --git a/metrics/metrics_test.go b/metrics/metrics_test.go index 534c44139b..2861d5f2ca 100644 --- a/metrics/metrics_test.go +++ b/metrics/metrics_test.go @@ -98,8 +98,8 @@ func Example() { t.Time(func() { time.Sleep(10 * time.Millisecond) }) t.Update(1) - fmt.Println(c.Count()) - fmt.Println(t.Min()) + fmt.Println(c.Snapshot().Count()) + fmt.Println(t.Snapshot().Min()) // Output: 17 // 1 } diff --git a/metrics/opentsdb.go b/metrics/opentsdb.go index 4d2e209238..e81690f943 100644 --- a/metrics/opentsdb.go +++ b/metrics/opentsdb.go @@ -65,15 +65,15 @@ func (c *OpenTSDBConfig) writeRegistry(w io.Writer, now int64, shortHostname str c.Registry.Each(func(name string, i interface{}) { switch metric := i.(type) { case Counter: - fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, metric.Count(), shortHostname) + fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, metric.Snapshot().Count(), shortHostname) case CounterFloat64: - fmt.Fprintf(w, "put %s.%s.count %d %f host=%s\n", c.Prefix, name, now, metric.Count(), shortHostname) + fmt.Fprintf(w, "put %s.%s.count %d %f host=%s\n", c.Prefix, name, now, metric.Snapshot().Count(), shortHostname) case Gauge: - fmt.Fprintf(w, "put %s.%s.value %d %d host=%s\n", c.Prefix, name, now, metric.Value(), shortHostname) + fmt.Fprintf(w, "put %s.%s.value %d %d host=%s\n", c.Prefix, name, now, metric.Snapshot().Value(), shortHostname) case GaugeFloat64: - fmt.Fprintf(w, "put %s.%s.value %d %f host=%s\n", c.Prefix, name, now, metric.Value(), shortHostname) + fmt.Fprintf(w, "put %s.%s.value %d %f host=%s\n", c.Prefix, name, now, metric.Snapshot().Value(), shortHostname) case GaugeInfo: - fmt.Fprintf(w, "put %s.%s.value %d %s host=%s\n", c.Prefix, name, now, metric.Value().String(), shortHostname) + fmt.Fprintf(w, "put %s.%s.value %d %s host=%s\n", c.Prefix, name, now, metric.Snapshot().Value().String(), shortHostname) case Histogram: h := metric.Snapshot() ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) diff --git a/metrics/opentsdb_test.go b/metrics/opentsdb_test.go index c02b98af06..4548309f9c 100644 --- a/metrics/opentsdb_test.go +++ b/metrics/opentsdb_test.go @@ -1,6 +1,7 @@ package metrics import ( + "fmt" "net" "os" "strings" @@ -47,5 +48,19 @@ func TestExampleOpenTSB(t *testing.T) { } if have, want := w.String(), string(wantB); have != want { t.Errorf("\nhave:\n%v\nwant:\n%v\n", have, want) + t.Logf("have vs want:\n%v", findFirstDiffPos(have, want)) } } + +func findFirstDiffPos(a, b string) string { + yy := strings.Split(b, "\n") + for i, x := range strings.Split(a, "\n") { + if i >= len(yy) { + return fmt.Sprintf("have:%d: %s\nwant:%d: ", i, x, i) + } + if y := yy[i]; x != y { + return fmt.Sprintf("have:%d: %s\nwant:%d: %s", i, x, i, y) + } + } + return "" +} diff --git a/metrics/prometheus/collector.go b/metrics/prometheus/collector.go index f66d3fa78c..ecb4525b4b 100644 --- a/metrics/prometheus/collector.go +++ b/metrics/prometheus/collector.go @@ -75,27 +75,27 @@ func (c *collector) Add(name string, i any) error { return nil } -func (c *collector) addCounter(name string, m metrics.Counter) { +func (c *collector) addCounter(name string, m metrics.CounterSnapshot) { c.writeGaugeCounter(name, m.Count()) } -func (c *collector) addCounterFloat64(name string, m metrics.CounterFloat64) { +func (c *collector) addCounterFloat64(name string, m metrics.CounterFloat64Snapshot) { c.writeGaugeCounter(name, m.Count()) } -func (c *collector) addGauge(name string, m metrics.Gauge) { +func (c *collector) addGauge(name string, m metrics.GaugeSnapshot) { c.writeGaugeCounter(name, m.Value()) } -func (c *collector) addGaugeFloat64(name string, m metrics.GaugeFloat64) { +func (c *collector) addGaugeFloat64(name string, m metrics.GaugeFloat64Snapshot) { c.writeGaugeCounter(name, m.Value()) } -func (c *collector) addGaugeInfo(name string, m metrics.GaugeInfo) { +func (c *collector) addGaugeInfo(name string, m metrics.GaugeInfoSnapshot) { c.writeGaugeInfo(name, m.Value()) } -func (c *collector) addHistogram(name string, m metrics.Histogram) { +func (c *collector) addHistogram(name string, m metrics.HistogramSnapshot) { pv := []float64{0.5, 0.75, 0.95, 0.99, 0.999, 0.9999} ps := m.Percentiles(pv) c.writeSummaryCounter(name, m.Count()) @@ -106,11 +106,11 @@ func (c *collector) addHistogram(name string, m metrics.Histogram) { c.buff.WriteRune('\n') } -func (c *collector) addMeter(name string, m metrics.Meter) { +func (c *collector) addMeter(name string, m metrics.MeterSnapshot) { c.writeGaugeCounter(name, m.Count()) } -func (c *collector) addTimer(name string, m metrics.Timer) { +func (c *collector) addTimer(name string, m metrics.TimerSnapshot) { pv := []float64{0.5, 0.75, 0.95, 0.99, 0.999, 0.9999} ps := m.Percentiles(pv) c.writeSummaryCounter(name, m.Count()) @@ -121,13 +121,12 @@ func (c *collector) addTimer(name string, m metrics.Timer) { c.buff.WriteRune('\n') } -func (c *collector) addResettingTimer(name string, m metrics.ResettingTimer) { - if len(m.Values()) <= 0 { +func (c *collector) addResettingTimer(name string, m metrics.ResettingTimerSnapshot) { + if m.Count() <= 0 { return } - ps := m.Percentiles([]float64{50, 95, 99}) - val := m.Values() - c.writeSummaryCounter(name, len(val)) + ps := m.Percentiles([]float64{0.50, 0.95, 0.99}) + c.writeSummaryCounter(name, m.Count()) c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, mutateKey(name))) c.writeSummaryPercentile(name, "0.50", ps[0]) c.writeSummaryPercentile(name, "0.95", ps[1]) diff --git a/metrics/prometheus/collector_test.go b/metrics/prometheus/collector_test.go index 2f0e32972d..765c6cd025 100644 --- a/metrics/prometheus/collector_test.go +++ b/metrics/prometheus/collector_test.go @@ -55,10 +55,10 @@ func findFirstDiffPos(a, b string) string { yy := strings.Split(b, "\n") for i, x := range strings.Split(a, "\n") { if i >= len(yy) { - return fmt.Sprintf("a:%d: %s\nb:%d: ", i, x, i) + return fmt.Sprintf("have:%d: %s\nwant:%d: ", i, x, i) } if y := yy[i]; x != y { - return fmt.Sprintf("a:%d: %s\nb:%d: %s", i, x, i, y) + return fmt.Sprintf("have:%d: %s\nwant:%d: %s", i, x, i, y) } } return "" diff --git a/metrics/prometheus/testdata/prometheus.want b/metrics/prometheus/testdata/prometheus.want index f35496e61d..861c5f5cf0 100644 --- a/metrics/prometheus/testdata/prometheus.want +++ b/metrics/prometheus/testdata/prometheus.want @@ -1,3 +1,25 @@ +# TYPE system_cpu_schedlatency_count counter +system_cpu_schedlatency_count 5645 + +# TYPE system_cpu_schedlatency summary +system_cpu_schedlatency {quantile="0.5"} 0 +system_cpu_schedlatency {quantile="0.75"} 7168 +system_cpu_schedlatency {quantile="0.95"} 1.6777216e+07 +system_cpu_schedlatency {quantile="0.99"} 2.9360128e+07 +system_cpu_schedlatency {quantile="0.999"} 3.3554432e+07 +system_cpu_schedlatency {quantile="0.9999"} 3.3554432e+07 + +# TYPE system_memory_pauses_count counter +system_memory_pauses_count 14 + +# TYPE system_memory_pauses summary +system_memory_pauses {quantile="0.5"} 32768 +system_memory_pauses {quantile="0.75"} 57344 +system_memory_pauses {quantile="0.95"} 196608 +system_memory_pauses {quantile="0.99"} 196608 +system_memory_pauses {quantile="0.999"} 196608 +system_memory_pauses {quantile="0.9999"} 196608 + # TYPE test_counter gauge test_counter 12345 @@ -31,9 +53,9 @@ test_meter 0 test_resetting_timer_count 6 # TYPE test_resetting_timer summary -test_resetting_timer {quantile="0.50"} 12000000 -test_resetting_timer {quantile="0.95"} 120000000 -test_resetting_timer {quantile="0.99"} 120000000 +test_resetting_timer {quantile="0.50"} 1.25e+07 +test_resetting_timer {quantile="0.95"} 1.2e+08 +test_resetting_timer {quantile="0.99"} 1.2e+08 # TYPE test_timer_count counter test_timer_count 6 diff --git a/metrics/registry.go b/metrics/registry.go index 66dbc890c0..8bfbc08042 100644 --- a/metrics/registry.go +++ b/metrics/registry.go @@ -150,13 +150,13 @@ func (r *StandardRegistry) GetAll() map[string]map[string]interface{} { values := make(map[string]interface{}) switch metric := i.(type) { case Counter: - values["count"] = metric.Count() + values["count"] = metric.Snapshot().Count() case CounterFloat64: - values["count"] = metric.Count() + values["count"] = metric.Snapshot().Count() case Gauge: - values["value"] = metric.Value() + values["value"] = metric.Snapshot().Value() case GaugeFloat64: - values["value"] = metric.Value() + values["value"] = metric.Snapshot().Value() case Healthcheck: values["error"] = nil metric.Check() diff --git a/metrics/registry_test.go b/metrics/registry_test.go index 7cc5cf14fe..75012dd4ac 100644 --- a/metrics/registry_test.go +++ b/metrics/registry_test.go @@ -85,11 +85,11 @@ func TestRegistryDuplicate(t *testing.T) { func TestRegistryGet(t *testing.T) { r := NewRegistry() r.Register("foo", NewCounter()) - if count := r.Get("foo").(Counter).Count(); count != 0 { + if count := r.Get("foo").(Counter).Snapshot().Count(); count != 0 { t.Fatal(count) } r.Get("foo").(Counter).Inc(1) - if count := r.Get("foo").(Counter).Count(); count != 1 { + if count := r.Get("foo").(Counter).Snapshot().Count(); count != 1 { t.Fatal(count) } } diff --git a/metrics/resetting_sample.go b/metrics/resetting_sample.go index 43c1129cd0..c38ffcd3ec 100644 --- a/metrics/resetting_sample.go +++ b/metrics/resetting_sample.go @@ -17,7 +17,7 @@ type resettingSample struct { } // Snapshot returns a read-only copy of the sample with the original reset. -func (rs *resettingSample) Snapshot() Sample { +func (rs *resettingSample) Snapshot() SampleSnapshot { s := rs.Sample.Snapshot() rs.Sample.Clear() return s diff --git a/metrics/resetting_timer.go b/metrics/resetting_timer.go index 8e23c8eeea..6802e3fcea 100644 --- a/metrics/resetting_timer.go +++ b/metrics/resetting_timer.go @@ -1,22 +1,24 @@ package metrics import ( - "math" "sync" "time" - - "golang.org/x/exp/slices" ) // Initial slice capacity for the values stored in a ResettingTimer const InitialResettingTimerSliceCap = 10 +type ResettingTimerSnapshot interface { + Count() int + Mean() float64 + Max() int64 + Min() int64 + Percentiles([]float64) []float64 +} + // ResettingTimer is used for storing aggregated values for timers, which are reset on every flush interval. type ResettingTimer interface { - Values() []int64 - Snapshot() ResettingTimer - Percentiles([]float64) []int64 - Mean() float64 + Snapshot() ResettingTimerSnapshot Time(func()) Update(time.Duration) UpdateSince(time.Time) @@ -52,70 +54,40 @@ func NewResettingTimer() ResettingTimer { } // NilResettingTimer is a no-op ResettingTimer. -type NilResettingTimer struct { -} - -// Values is a no-op. -func (NilResettingTimer) Values() []int64 { return nil } - -// Snapshot is a no-op. -func (NilResettingTimer) Snapshot() ResettingTimer { - return &ResettingTimerSnapshot{ - values: []int64{}, - } -} - -// Time is a no-op. -func (NilResettingTimer) Time(f func()) { f() } - -// Update is a no-op. -func (NilResettingTimer) Update(time.Duration) {} - -// Percentiles panics. -func (NilResettingTimer) Percentiles([]float64) []int64 { - panic("Percentiles called on a NilResettingTimer") -} - -// Mean panics. -func (NilResettingTimer) Mean() float64 { - panic("Mean called on a NilResettingTimer") -} - -// UpdateSince is a no-op. -func (NilResettingTimer) UpdateSince(time.Time) {} +type NilResettingTimer struct{} + +func (NilResettingTimer) Values() []int64 { return nil } +func (n NilResettingTimer) Snapshot() ResettingTimerSnapshot { return n } +func (NilResettingTimer) Time(f func()) { f() } +func (NilResettingTimer) Update(time.Duration) {} +func (NilResettingTimer) Percentiles([]float64) []float64 { return nil } +func (NilResettingTimer) Mean() float64 { return 0.0 } +func (NilResettingTimer) Max() int64 { return 0 } +func (NilResettingTimer) Min() int64 { return 0 } +func (NilResettingTimer) UpdateSince(time.Time) {} +func (NilResettingTimer) Count() int { return 0 } // StandardResettingTimer is the standard implementation of a ResettingTimer. // and Meter. type StandardResettingTimer struct { values []int64 - mutex sync.Mutex -} + sum int64 // sum is a running count of the total sum, used later to calculate mean -// Values returns a slice with all measurements. -func (t *StandardResettingTimer) Values() []int64 { - return t.values + mutex sync.Mutex } // Snapshot resets the timer and returns a read-only copy of its contents. -func (t *StandardResettingTimer) Snapshot() ResettingTimer { +func (t *StandardResettingTimer) Snapshot() ResettingTimerSnapshot { t.mutex.Lock() defer t.mutex.Unlock() - currentValues := t.values - t.values = make([]int64, 0, InitialResettingTimerSliceCap) - - return &ResettingTimerSnapshot{ - values: currentValues, + snapshot := &resettingTimerSnapshot{} + if len(t.values) > 0 { + snapshot.mean = float64(t.sum) / float64(len(t.values)) + snapshot.values = t.values + t.values = make([]int64, 0, InitialResettingTimerSliceCap) } -} - -// Percentiles panics. -func (t *StandardResettingTimer) Percentiles([]float64) []int64 { - panic("Percentiles called on a StandardResettingTimer") -} - -// Mean panics. -func (t *StandardResettingTimer) Mean() float64 { - panic("Mean called on a StandardResettingTimer") + t.sum = 0 + return snapshot } // Record the duration of the execution of the given function. @@ -130,106 +102,70 @@ func (t *StandardResettingTimer) Update(d time.Duration) { t.mutex.Lock() defer t.mutex.Unlock() t.values = append(t.values, int64(d)) + t.sum += int64(d) } // Record the duration of an event that started at a time and ends now. func (t *StandardResettingTimer) UpdateSince(ts time.Time) { - t.mutex.Lock() - defer t.mutex.Unlock() - t.values = append(t.values, int64(time.Since(ts))) + t.Update(time.Since(ts)) } -// ResettingTimerSnapshot is a point-in-time copy of another ResettingTimer. -type ResettingTimerSnapshot struct { +// resettingTimerSnapshot is a point-in-time copy of another ResettingTimer. +type resettingTimerSnapshot struct { values []int64 mean float64 - thresholdBoundaries []int64 + max int64 + min int64 + thresholdBoundaries []float64 calculated bool } -// Snapshot returns the snapshot. -func (t *ResettingTimerSnapshot) Snapshot() ResettingTimer { return t } - -// Time panics. -func (*ResettingTimerSnapshot) Time(func()) { - panic("Time called on a ResettingTimerSnapshot") -} - -// Update panics. -func (*ResettingTimerSnapshot) Update(time.Duration) { - panic("Update called on a ResettingTimerSnapshot") -} - -// UpdateSince panics. -func (*ResettingTimerSnapshot) UpdateSince(time.Time) { - panic("UpdateSince called on a ResettingTimerSnapshot") -} - -// Values returns all values from snapshot. -func (t *ResettingTimerSnapshot) Values() []int64 { - return t.values +// Count return the length of the values from snapshot. +func (t *resettingTimerSnapshot) Count() int { + return len(t.values) } // Percentiles returns the boundaries for the input percentiles. -func (t *ResettingTimerSnapshot) Percentiles(percentiles []float64) []int64 { +// note: this method is not thread safe +func (t *resettingTimerSnapshot) Percentiles(percentiles []float64) []float64 { t.calc(percentiles) - return t.thresholdBoundaries } // Mean returns the mean of the snapshotted values -func (t *ResettingTimerSnapshot) Mean() float64 { +// note: this method is not thread safe +func (t *resettingTimerSnapshot) Mean() float64 { if !t.calculated { - t.calc([]float64{}) + t.calc(nil) } return t.mean } -func (t *ResettingTimerSnapshot) calc(percentiles []float64) { - slices.Sort(t.values) - - count := len(t.values) - if count > 0 { - min := t.values[0] - max := t.values[count-1] - - cumulativeValues := make([]int64, count) - cumulativeValues[0] = min - for i := 1; i < count; i++ { - cumulativeValues[i] = t.values[i] + cumulativeValues[i-1] - } - - t.thresholdBoundaries = make([]int64, len(percentiles)) - - thresholdBoundary := max - - for i, pct := range percentiles { - if count > 1 { - var abs float64 - if pct >= 0 { - abs = pct - } else { - abs = 100 + pct - } - // poor man's math.Round(x): - // math.Floor(x + 0.5) - indexOfPerc := int(math.Floor(((abs / 100.0) * float64(count)) + 0.5)) - if pct >= 0 && indexOfPerc > 0 { - indexOfPerc -= 1 // index offset=0 - } - thresholdBoundary = t.values[indexOfPerc] - } - - t.thresholdBoundaries[i] = thresholdBoundary - } - - sum := cumulativeValues[count-1] - t.mean = float64(sum) / float64(count) - } else { - t.thresholdBoundaries = make([]int64, len(percentiles)) - t.mean = 0 +// Max returns the max of the snapshotted values +// note: this method is not thread safe +func (t *resettingTimerSnapshot) Max() int64 { + if !t.calculated { + t.calc(nil) + } + return t.max +} + +// Min returns the min of the snapshotted values +// note: this method is not thread safe +func (t *resettingTimerSnapshot) Min() int64 { + if !t.calculated { + t.calc(nil) } + return t.min +} - t.calculated = true +func (t *resettingTimerSnapshot) calc(percentiles []float64) { + scores := CalculatePercentiles(t.values, percentiles) + t.thresholdBoundaries = scores + if len(t.values) == 0 { + return + } + t.min = t.values[0] + t.max = t.values[len(t.values)-1] } diff --git a/metrics/resetting_timer_test.go b/metrics/resetting_timer_test.go index 77c49dc386..4571fc8eb0 100644 --- a/metrics/resetting_timer_test.go +++ b/metrics/resetting_timer_test.go @@ -10,9 +10,9 @@ func TestResettingTimer(t *testing.T) { values []int64 start int end int - wantP50 int64 - wantP95 int64 - wantP99 int64 + wantP50 float64 + wantP95 float64 + wantP99 float64 wantMean float64 wantMin int64 wantMax int64 @@ -21,14 +21,14 @@ func TestResettingTimer(t *testing.T) { values: []int64{}, start: 1, end: 11, - wantP50: 5, wantP95: 10, wantP99: 10, + wantP50: 5.5, wantP95: 10, wantP99: 10, wantMin: 1, wantMax: 10, wantMean: 5.5, }, { values: []int64{}, start: 1, end: 101, - wantP50: 50, wantP95: 95, wantP99: 99, + wantP50: 50.5, wantP95: 95.94999999999999, wantP99: 99.99, wantMin: 1, wantMax: 100, wantMean: 50.5, }, { @@ -56,11 +56,11 @@ func TestResettingTimer(t *testing.T) { values: []int64{1, 10}, start: 0, end: 0, - wantP50: 1, wantP95: 10, wantP99: 10, + wantP50: 5.5, wantP95: 10, wantP99: 10, wantMin: 1, wantMax: 10, wantMean: 5.5, }, } - for ind, tt := range tests { + for i, tt := range tests { timer := NewResettingTimer() for i := tt.start; i < tt.end; i++ { @@ -70,37 +70,27 @@ func TestResettingTimer(t *testing.T) { for _, v := range tt.values { timer.Update(time.Duration(v)) } - snap := timer.Snapshot() - ps := snap.Percentiles([]float64{50, 95, 99}) - - val := snap.Values() + ps := snap.Percentiles([]float64{0.50, 0.95, 0.99}) - if len(val) > 0 { - if tt.wantMin != val[0] { - t.Fatalf("%d: min: got %d, want %d", ind, val[0], tt.wantMin) - } - - if tt.wantMax != val[len(val)-1] { - t.Fatalf("%d: max: got %d, want %d", ind, val[len(val)-1], tt.wantMax) - } + if have, want := snap.Min(), tt.wantMin; have != want { + t.Fatalf("%d: min: have %d, want %d", i, have, want) } - - if tt.wantMean != snap.Mean() { - t.Fatalf("%d: mean: got %.2f, want %.2f", ind, snap.Mean(), tt.wantMean) + if have, want := snap.Max(), tt.wantMax; have != want { + t.Fatalf("%d: max: have %d, want %d", i, have, want) } - - if tt.wantP50 != ps[0] { - t.Fatalf("%d: p50: got %d, want %d", ind, ps[0], tt.wantP50) + if have, want := snap.Mean(), tt.wantMean; have != want { + t.Fatalf("%d: mean: have %v, want %v", i, have, want) } - - if tt.wantP95 != ps[1] { - t.Fatalf("%d: p95: got %d, want %d", ind, ps[1], tt.wantP95) + if have, want := ps[0], tt.wantP50; have != want { + t.Errorf("%d: p50: have %v, want %v", i, have, want) } - - if tt.wantP99 != ps[2] { - t.Fatalf("%d: p99: got %d, want %d", ind, ps[2], tt.wantP99) + if have, want := ps[1], tt.wantP95; have != want { + t.Errorf("%d: p95: have %v, want %v", i, have, want) + } + if have, want := ps[2], tt.wantP99; have != want { + t.Errorf("%d: p99: have %v, want %v", i, have, want) } } } @@ -110,11 +100,11 @@ func TestResettingTimerWithFivePercentiles(t *testing.T) { values []int64 start int end int - wantP05 int64 - wantP20 int64 - wantP50 int64 - wantP95 int64 - wantP99 int64 + wantP05 float64 + wantP20 float64 + wantP50 float64 + wantP95 float64 + wantP99 float64 wantMean float64 wantMin int64 wantMax int64 @@ -123,14 +113,14 @@ func TestResettingTimerWithFivePercentiles(t *testing.T) { values: []int64{}, start: 1, end: 11, - wantP05: 1, wantP20: 2, wantP50: 5, wantP95: 10, wantP99: 10, + wantP05: 1, wantP20: 2.2, wantP50: 5.5, wantP95: 10, wantP99: 10, wantMin: 1, wantMax: 10, wantMean: 5.5, }, { values: []int64{}, start: 1, end: 101, - wantP05: 5, wantP20: 20, wantP50: 50, wantP95: 95, wantP99: 99, + wantP05: 5.050000000000001, wantP20: 20.200000000000003, wantP50: 50.5, wantP95: 95.94999999999999, wantP99: 99.99, wantMin: 1, wantMax: 100, wantMean: 50.5, }, { @@ -158,7 +148,7 @@ func TestResettingTimerWithFivePercentiles(t *testing.T) { values: []int64{1, 10}, start: 0, end: 0, - wantP05: 1, wantP20: 1, wantP50: 1, wantP95: 10, wantP99: 10, + wantP05: 1, wantP20: 1, wantP50: 5.5, wantP95: 10, wantP99: 10, wantMin: 1, wantMax: 10, wantMean: 5.5, }, } @@ -175,42 +165,33 @@ func TestResettingTimerWithFivePercentiles(t *testing.T) { snap := timer.Snapshot() - ps := snap.Percentiles([]float64{5, 20, 50, 95, 99}) - - val := snap.Values() + ps := snap.Percentiles([]float64{0.05, 0.20, 0.50, 0.95, 0.99}) - if len(val) > 0 { - if tt.wantMin != val[0] { - t.Fatalf("%d: min: got %d, want %d", ind, val[0], tt.wantMin) - } + if tt.wantMin != snap.Min() { + t.Errorf("%d: min: got %d, want %d", ind, snap.Min(), tt.wantMin) + } - if tt.wantMax != val[len(val)-1] { - t.Fatalf("%d: max: got %d, want %d", ind, val[len(val)-1], tt.wantMax) - } + if tt.wantMax != snap.Max() { + t.Errorf("%d: max: got %d, want %d", ind, snap.Max(), tt.wantMax) } if tt.wantMean != snap.Mean() { - t.Fatalf("%d: mean: got %.2f, want %.2f", ind, snap.Mean(), tt.wantMean) + t.Errorf("%d: mean: got %.2f, want %.2f", ind, snap.Mean(), tt.wantMean) } - if tt.wantP05 != ps[0] { - t.Fatalf("%d: p05: got %d, want %d", ind, ps[0], tt.wantP05) + t.Errorf("%d: p05: got %v, want %v", ind, ps[0], tt.wantP05) } - if tt.wantP20 != ps[1] { - t.Fatalf("%d: p20: got %d, want %d", ind, ps[1], tt.wantP20) + t.Errorf("%d: p20: got %v, want %v", ind, ps[1], tt.wantP20) } - if tt.wantP50 != ps[2] { - t.Fatalf("%d: p50: got %d, want %d", ind, ps[2], tt.wantP50) + t.Errorf("%d: p50: got %v, want %v", ind, ps[2], tt.wantP50) } - if tt.wantP95 != ps[3] { - t.Fatalf("%d: p95: got %d, want %d", ind, ps[3], tt.wantP95) + t.Errorf("%d: p95: got %v, want %v", ind, ps[3], tt.wantP95) } - if tt.wantP99 != ps[4] { - t.Fatalf("%d: p99: got %d, want %d", ind, ps[4], tt.wantP99) + t.Errorf("%d: p99: got %v, want %v", ind, ps[4], tt.wantP99) } } } diff --git a/metrics/runtimehistogram.go b/metrics/runtimehistogram.go index c68939af1e..92fcbcc281 100644 --- a/metrics/runtimehistogram.go +++ b/metrics/runtimehistogram.go @@ -17,13 +17,19 @@ func getOrRegisterRuntimeHistogram(name string, scale float64, r Registry) *runt // runtimeHistogram wraps a runtime/metrics histogram. type runtimeHistogram struct { - v atomic.Value + v atomic.Value // v is a pointer to a metrics.Float64Histogram scaleFactor float64 } func newRuntimeHistogram(scale float64) *runtimeHistogram { h := &runtimeHistogram{scaleFactor: scale} - h.update(&metrics.Float64Histogram{}) + h.update(new(metrics.Float64Histogram)) + return h +} + +func RuntimeHistogramFromData(scale float64, hist *metrics.Float64Histogram) *runtimeHistogram { + h := &runtimeHistogram{scaleFactor: scale} + h.update(hist) return h } @@ -35,130 +41,107 @@ func (h *runtimeHistogram) update(mh *metrics.Float64Histogram) { return } - s := runtimeHistogramSnapshot{ + s := metrics.Float64Histogram{ Counts: make([]uint64, len(mh.Counts)), Buckets: make([]float64, len(mh.Buckets)), } copy(s.Counts, mh.Counts) - copy(s.Buckets, mh.Buckets) - for i, b := range s.Buckets { + for i, b := range mh.Buckets { s.Buckets[i] = b * h.scaleFactor } h.v.Store(&s) } -func (h *runtimeHistogram) load() *runtimeHistogramSnapshot { - return h.v.Load().(*runtimeHistogramSnapshot) -} - func (h *runtimeHistogram) Clear() { panic("runtimeHistogram does not support Clear") } func (h *runtimeHistogram) Update(int64) { panic("runtimeHistogram does not support Update") } -func (h *runtimeHistogram) Sample() Sample { - return NilSample{} -} - -// Snapshot returns a non-changing cop of the histogram. -func (h *runtimeHistogram) Snapshot() Histogram { - return h.load() -} - -// Count returns the sample count. -func (h *runtimeHistogram) Count() int64 { - return h.load().Count() -} - -// Mean returns an approximation of the mean. -func (h *runtimeHistogram) Mean() float64 { - return h.load().Mean() -} - -// StdDev approximates the standard deviation of the histogram. -func (h *runtimeHistogram) StdDev() float64 { - return h.load().StdDev() -} - -// Variance approximates the variance of the histogram. -func (h *runtimeHistogram) Variance() float64 { - return h.load().Variance() -} - -// Percentile computes the p'th percentile value. -func (h *runtimeHistogram) Percentile(p float64) float64 { - return h.load().Percentile(p) -} -// Percentiles computes all requested percentile values. -func (h *runtimeHistogram) Percentiles(ps []float64) []float64 { - return h.load().Percentiles(ps) -} - -// Max returns the highest sample value. -func (h *runtimeHistogram) Max() int64 { - return h.load().Max() +// Snapshot returns a non-changing copy of the histogram. +func (h *runtimeHistogram) Snapshot() HistogramSnapshot { + hist := h.v.Load().(*metrics.Float64Histogram) + return newRuntimeHistogramSnapshot(hist) } -// Min returns the lowest sample value. -func (h *runtimeHistogram) Min() int64 { - return h.load().Min() -} - -// Sum returns the sum of all sample values. -func (h *runtimeHistogram) Sum() int64 { - return h.load().Sum() +type runtimeHistogramSnapshot struct { + internal *metrics.Float64Histogram + calculated bool + // The following fields are (lazily) calculated based on 'internal' + mean float64 + count int64 + min int64 // min is the lowest sample value. + max int64 // max is the highest sample value. + variance float64 } -type runtimeHistogramSnapshot metrics.Float64Histogram - -func (h *runtimeHistogramSnapshot) Clear() { - panic("runtimeHistogram does not support Clear") -} -func (h *runtimeHistogramSnapshot) Update(int64) { - panic("runtimeHistogram does not support Update") -} -func (h *runtimeHistogramSnapshot) Sample() Sample { - return NilSample{} +func newRuntimeHistogramSnapshot(h *metrics.Float64Histogram) *runtimeHistogramSnapshot { + return &runtimeHistogramSnapshot{ + internal: h, + } } -func (h *runtimeHistogramSnapshot) Snapshot() Histogram { - return h +// calc calculates the values for the snapshot. This method is not threadsafe. +func (h *runtimeHistogramSnapshot) calc() { + h.calculated = true + var ( + count int64 // number of samples + sum float64 // approx sum of all sample values + min int64 + max float64 + ) + if len(h.internal.Counts) == 0 { + return + } + for i, c := range h.internal.Counts { + if c == 0 { + continue + } + if count == 0 { // Set min only first loop iteration + min = int64(math.Floor(h.internal.Buckets[i])) + } + count += int64(c) + sum += h.midpoint(i) * float64(c) + // Set max on every iteration + edge := h.internal.Buckets[i+1] + if math.IsInf(edge, 1) { + edge = h.internal.Buckets[i] + } + if edge > max { + max = edge + } + } + h.min = min + h.max = int64(max) + h.mean = sum / float64(count) + h.count = count } // Count returns the sample count. func (h *runtimeHistogramSnapshot) Count() int64 { - var count int64 - for _, c := range h.Counts { - count += int64(c) + if !h.calculated { + h.calc() } - return count + return h.count } -// Mean returns an approximation of the mean. -func (h *runtimeHistogramSnapshot) Mean() float64 { - if len(h.Counts) == 0 { - return 0 - } - mean, _ := h.mean() - return mean +// Size returns the size of the sample at the time the snapshot was taken. +func (h *runtimeHistogramSnapshot) Size() int { + return len(h.internal.Counts) } -// mean computes the mean and also the total sample count. -func (h *runtimeHistogramSnapshot) mean() (mean, totalCount float64) { - var sum float64 - for i, c := range h.Counts { - midpoint := h.midpoint(i) - sum += midpoint * float64(c) - totalCount += float64(c) +// Mean returns an approximation of the mean. +func (h *runtimeHistogramSnapshot) Mean() float64 { + if !h.calculated { + h.calc() } - return sum / totalCount, totalCount + return h.mean } func (h *runtimeHistogramSnapshot) midpoint(bucket int) float64 { - high := h.Buckets[bucket+1] - low := h.Buckets[bucket] + high := h.internal.Buckets[bucket+1] + low := h.internal.Buckets[bucket] if math.IsInf(high, 1) { // The edge of the highest bucket can be +Inf, and it's supposed to mean that this // bucket contains all remaining samples > low. We can't get the middle of an @@ -180,23 +163,31 @@ func (h *runtimeHistogramSnapshot) StdDev() float64 { // Variance approximates the variance of the histogram. func (h *runtimeHistogramSnapshot) Variance() float64 { - if len(h.Counts) == 0 { + if len(h.internal.Counts) == 0 { return 0 } - - mean, totalCount := h.mean() - if totalCount <= 1 { + if !h.calculated { + h.calc() + } + if h.count <= 1 { // There is no variance when there are zero or one items. return 0 } - + // Variance is not calculated in 'calc', because it requires a second iteration. + // Therefore we calculate it lazily in this method, triggered either by + // a direct call to Variance or via StdDev. + if h.variance != 0.0 { + return h.variance + } var sum float64 - for i, c := range h.Counts { + + for i, c := range h.internal.Counts { midpoint := h.midpoint(i) - d := midpoint - mean + d := midpoint - h.mean sum += float64(c) * (d * d) } - return sum / (totalCount - 1) + h.variance = sum / float64(h.count-1) + return h.variance } // Percentile computes the p'th percentile value. @@ -231,11 +222,11 @@ func (h *runtimeHistogramSnapshot) Percentiles(ps []float64) []float64 { func (h *runtimeHistogramSnapshot) computePercentiles(thresh []float64) { var totalCount float64 - for i, count := range h.Counts { + for i, count := range h.internal.Counts { totalCount += float64(count) for len(thresh) > 0 && thresh[0] < totalCount { - thresh[0] = h.Buckets[i] + thresh[0] = h.internal.Buckets[i] thresh = thresh[1:] } if len(thresh) == 0 { @@ -250,34 +241,25 @@ func (h *runtimeHistogramSnapshot) computePercentiles(thresh []float64) { // Max returns the highest sample value. func (h *runtimeHistogramSnapshot) Max() int64 { - for i := len(h.Counts) - 1; i >= 0; i-- { - count := h.Counts[i] - if count > 0 { - edge := h.Buckets[i+1] - if math.IsInf(edge, 1) { - edge = h.Buckets[i] - } - return int64(math.Ceil(edge)) - } + if !h.calculated { + h.calc() } - return 0 + return h.max } // Min returns the lowest sample value. func (h *runtimeHistogramSnapshot) Min() int64 { - for i, count := range h.Counts { - if count > 0 { - return int64(math.Floor(h.Buckets[i])) - } + if !h.calculated { + h.calc() } - return 0 + return h.min } // Sum returns the sum of all sample values. func (h *runtimeHistogramSnapshot) Sum() int64 { var sum float64 - for i := range h.Counts { - sum += h.Buckets[i] * float64(h.Counts[i]) + for i := range h.internal.Counts { + sum += h.internal.Buckets[i] * float64(h.internal.Counts[i]) } return int64(math.Ceil(sum)) } diff --git a/metrics/runtimehistogram_test.go b/metrics/runtimehistogram_test.go index d53a014383..cf7e36420a 100644 --- a/metrics/runtimehistogram_test.go +++ b/metrics/runtimehistogram_test.go @@ -1,11 +1,14 @@ package metrics import ( + "bytes" + "encoding/gob" "fmt" "math" "reflect" "runtime/metrics" "testing" + "time" ) var _ Histogram = (*runtimeHistogram)(nil) @@ -74,7 +77,7 @@ func TestRuntimeHistogramStats(t *testing.T) { for i, test := range tests { t.Run(fmt.Sprint(i), func(t *testing.T) { - s := runtimeHistogramSnapshot(test.h) + s := RuntimeHistogramFromData(1.0, &test.h).Snapshot() if v := s.Count(); v != test.Count { t.Errorf("Count() = %v, want %v", v, test.Count) @@ -121,13 +124,39 @@ func approxEqual(x, y, ε float64) bool { // This test verifies that requesting Percentiles in unsorted order // returns them in the requested order. func TestRuntimeHistogramStatsPercentileOrder(t *testing.T) { - p := runtimeHistogramSnapshot{ + s := RuntimeHistogramFromData(1.0, &metrics.Float64Histogram{ Counts: []uint64{1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, Buckets: []float64{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, - } - result := p.Percentiles([]float64{1, 0.2, 0.5, 0.1, 0.2}) + }).Snapshot() + result := s.Percentiles([]float64{1, 0.2, 0.5, 0.1, 0.2}) expected := []float64{10, 2, 5, 1, 2} if !reflect.DeepEqual(result, expected) { t.Fatal("wrong result:", result) } } + +func BenchmarkRuntimeHistogramSnapshotRead(b *testing.B) { + var sLatency = "7\xff\x81\x03\x01\x01\x10Float64Histogram\x01\xff\x82\x00\x01\x02\x01\x06Counts\x01\xff\x84\x00\x01\aBuckets\x01\xff\x86\x00\x00\x00\x16\xff\x83\x02\x01\x01\b[]uint64\x01\xff\x84\x00\x01\x06\x00\x00\x17\xff\x85\x02\x01\x01\t[]float64\x01\xff\x86\x00\x01\b\x00\x00\xfe\x06T\xff\x82\x01\xff\xa2\x00\xfe\r\xef\x00\x01\x02\x02\x04\x05\x04\b\x15\x17 B?6.L;$!2) \x1a? 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+ + dserialize := func(data string) *metrics.Float64Histogram { + var res metrics.Float64Histogram + if err := gob.NewDecoder(bytes.NewReader([]byte(data))).Decode(&res); err != nil { + panic(err) + } + return &res + } + latency := RuntimeHistogramFromData(float64(time.Second), dserialize(sLatency)) + b.ResetTimer() + b.ReportAllocs() + for i := 0; i < b.N; i++ { + snap := latency.Snapshot() + // These are the fields that influxdb accesses + _ = snap.Count() + _ = snap.Max() + _ = snap.Mean() + _ = snap.Min() + _ = snap.StdDev() + _ = snap.Variance() + _ = snap.Percentiles([]float64{0.25, 0.5, 0.75, 0.95, 0.99, 0.999, 0.9999}) + } +} diff --git a/metrics/sample.go b/metrics/sample.go index 252a878f58..5398dd42d5 100644 --- a/metrics/sample.go +++ b/metrics/sample.go @@ -11,10 +11,7 @@ import ( const rescaleThreshold = time.Hour -// Samples maintain a statistically-significant selection of values from -// a stream. -type Sample interface { - Clear() +type SampleSnapshot interface { Count() int64 Max() int64 Mean() float64 @@ -22,14 +19,19 @@ type Sample interface { Percentile(float64) float64 Percentiles([]float64) []float64 Size() int - Snapshot() Sample StdDev() float64 Sum() int64 - Update(int64) - Values() []int64 Variance() float64 } +// Samples maintain a statistically-significant selection of values from +// a stream. +type Sample interface { + Snapshot() SampleSnapshot + Clear() + Update(int64) +} + // ExpDecaySample is an exponentially-decaying sample using a forward-decaying // priority reservoir. See Cormode et al's "Forward Decay: A Practical Time // Decay Model for Streaming Systems". @@ -77,72 +79,29 @@ func (s *ExpDecaySample) Clear() { s.values.Clear() } -// Count returns the number of samples recorded, which may exceed the -// reservoir size. -func (s *ExpDecaySample) Count() int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return s.count -} - -// Max returns the maximum value in the sample, which may not be the maximum -// value ever to be part of the sample. -func (s *ExpDecaySample) Max() int64 { - return SampleMax(s.Values()) -} - -// Mean returns the mean of the values in the sample. -func (s *ExpDecaySample) Mean() float64 { - return SampleMean(s.Values()) -} - -// Min returns the minimum value in the sample, which may not be the minimum -// value ever to be part of the sample. -func (s *ExpDecaySample) Min() int64 { - return SampleMin(s.Values()) -} - -// Percentile returns an arbitrary percentile of values in the sample. -func (s *ExpDecaySample) Percentile(p float64) float64 { - return SamplePercentile(s.Values(), p) -} - -// Percentiles returns a slice of arbitrary percentiles of values in the -// sample. -func (s *ExpDecaySample) Percentiles(ps []float64) []float64 { - return SamplePercentiles(s.Values(), ps) -} - -// Size returns the size of the sample, which is at most the reservoir size. -func (s *ExpDecaySample) Size() int { - s.mutex.Lock() - defer s.mutex.Unlock() - return s.values.Size() -} - // Snapshot returns a read-only copy of the sample. -func (s *ExpDecaySample) Snapshot() Sample { +func (s *ExpDecaySample) Snapshot() SampleSnapshot { s.mutex.Lock() defer s.mutex.Unlock() - vals := s.values.Values() - values := make([]int64, len(vals)) - for i, v := range vals { - values[i] = v.v - } - return &SampleSnapshot{ - count: s.count, - values: values, + var ( + samples = s.values.Values() + values = make([]int64, len(samples)) + max int64 = math.MinInt64 + min int64 = math.MaxInt64 + sum int64 + ) + for i, item := range samples { + v := item.v + values[i] = v + sum += v + if v > max { + max = v + } + if v < min { + min = v + } } -} - -// StdDev returns the standard deviation of the values in the sample. -func (s *ExpDecaySample) StdDev() float64 { - return SampleStdDev(s.Values()) -} - -// Sum returns the sum of the values in the sample. -func (s *ExpDecaySample) Sum() int64 { - return SampleSum(s.Values()) + return newSampleSnapshotPrecalculated(s.count, values, min, max, sum) } // Update samples a new value. @@ -150,23 +109,6 @@ func (s *ExpDecaySample) Update(v int64) { s.update(time.Now(), v) } -// Values returns a copy of the values in the sample. -func (s *ExpDecaySample) Values() []int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - vals := s.values.Values() - values := make([]int64, len(vals)) - for i, v := range vals { - values[i] = v.v - } - return values -} - -// Variance returns the variance of the values in the sample. -func (s *ExpDecaySample) Variance() float64 { - return SampleVariance(s.Values()) -} - // update samples a new value at a particular timestamp. This is a method all // its own to facilitate testing. func (s *ExpDecaySample) update(t time.Time, v int64) { @@ -202,207 +144,160 @@ func (s *ExpDecaySample) update(t time.Time, v int64) { // NilSample is a no-op Sample. type NilSample struct{} -// Clear is a no-op. -func (NilSample) Clear() {} - -// Count is a no-op. -func (NilSample) Count() int64 { return 0 } - -// Max is a no-op. -func (NilSample) Max() int64 { return 0 } - -// Mean is a no-op. -func (NilSample) Mean() float64 { return 0.0 } - -// Min is a no-op. -func (NilSample) Min() int64 { return 0 } - -// Percentile is a no-op. -func (NilSample) Percentile(p float64) float64 { return 0.0 } - -// Percentiles is a no-op. -func (NilSample) Percentiles(ps []float64) []float64 { - return make([]float64, len(ps)) -} - -// Size is a no-op. -func (NilSample) Size() int { return 0 } - -// Sample is a no-op. -func (NilSample) Snapshot() Sample { return NilSample{} } - -// StdDev is a no-op. -func (NilSample) StdDev() float64 { return 0.0 } - -// Sum is a no-op. -func (NilSample) Sum() int64 { return 0 } - -// Update is a no-op. -func (NilSample) Update(v int64) {} - -// Values is a no-op. -func (NilSample) Values() []int64 { return []int64{} } - -// Variance is a no-op. -func (NilSample) Variance() float64 { return 0.0 } - -// SampleMax returns the maximum value of the slice of int64. -func SampleMax(values []int64) int64 { - if len(values) == 0 { - return 0 - } - var max int64 = math.MinInt64 - for _, v := range values { - if max < v { - max = v - } - } - return max -} - -// SampleMean returns the mean value of the slice of int64. -func SampleMean(values []int64) float64 { - if len(values) == 0 { - return 0.0 - } - return float64(SampleSum(values)) / float64(len(values)) -} - -// SampleMin returns the minimum value of the slice of int64. -func SampleMin(values []int64) int64 { - if len(values) == 0 { - return 0 - } - var min int64 = math.MaxInt64 - for _, v := range values { - if min > v { - min = v - } - } - return min -} +func (NilSample) Clear() {} +func (NilSample) Snapshot() SampleSnapshot { return (*emptySnapshot)(nil) } +func (NilSample) Update(v int64) {} // SamplePercentiles returns an arbitrary percentile of the slice of int64. func SamplePercentile(values []int64, p float64) float64 { - return SamplePercentiles(values, []float64{p})[0] + return CalculatePercentiles(values, []float64{p})[0] } -// SamplePercentiles returns a slice of arbitrary percentiles of the slice of -// int64. -func SamplePercentiles(values []int64, ps []float64) []float64 { +// CalculatePercentiles returns a slice of arbitrary percentiles of the slice of +// int64. This method returns interpolated results, so e.g if there are only two +// values, [0, 10], a 50% percentile will land between them. +// +// Note: As a side-effect, this method will also sort the slice of values. +// Note2: The input format for percentiles is NOT percent! To express 50%, use 0.5, not 50. +func CalculatePercentiles(values []int64, ps []float64) []float64 { scores := make([]float64, len(ps)) size := len(values) - if size > 0 { - slices.Sort(values) - for i, p := range ps { - pos := p * float64(size+1) - if pos < 1.0 { - scores[i] = float64(values[0]) - } else if pos >= float64(size) { - scores[i] = float64(values[size-1]) - } else { - lower := float64(values[int(pos)-1]) - upper := float64(values[int(pos)]) - scores[i] = lower + (pos-math.Floor(pos))*(upper-lower) - } + if size == 0 { + return scores + } + slices.Sort(values) + for i, p := range ps { + pos := p * float64(size+1) + + if pos < 1.0 { + scores[i] = float64(values[0]) + } else if pos >= float64(size) { + scores[i] = float64(values[size-1]) + } else { + lower := float64(values[int(pos)-1]) + upper := float64(values[int(pos)]) + scores[i] = lower + (pos-math.Floor(pos))*(upper-lower) } } return scores } -// SampleSnapshot is a read-only copy of another Sample. -type SampleSnapshot struct { +// sampleSnapshot is a read-only copy of another Sample. +type sampleSnapshot struct { count int64 values []int64 + + max int64 + min int64 + mean float64 + sum int64 + variance float64 } -func NewSampleSnapshot(count int64, values []int64) *SampleSnapshot { - return &SampleSnapshot{ +// newSampleSnapshotPrecalculated creates a read-only sampleSnapShot, using +// precalculated sums to avoid iterating the values +func newSampleSnapshotPrecalculated(count int64, values []int64, min, max, sum int64) *sampleSnapshot { + if len(values) == 0 { + return &sampleSnapshot{ + count: count, + values: values, + } + } + return &sampleSnapshot{ count: count, values: values, + max: max, + min: min, + mean: float64(sum) / float64(len(values)), + sum: sum, } } -// Clear panics. -func (*SampleSnapshot) Clear() { - panic("Clear called on a SampleSnapshot") +// newSampleSnapshot creates a read-only sampleSnapShot, and calculates some +// numbers. +func newSampleSnapshot(count int64, values []int64) *sampleSnapshot { + var ( + max int64 = math.MinInt64 + min int64 = math.MaxInt64 + sum int64 + ) + for _, v := range values { + sum += v + if v > max { + max = v + } + if v < min { + min = v + } + } + return newSampleSnapshotPrecalculated(count, values, min, max, sum) } // Count returns the count of inputs at the time the snapshot was taken. -func (s *SampleSnapshot) Count() int64 { return s.count } +func (s *sampleSnapshot) Count() int64 { return s.count } // Max returns the maximal value at the time the snapshot was taken. -func (s *SampleSnapshot) Max() int64 { return SampleMax(s.values) } +func (s *sampleSnapshot) Max() int64 { return s.max } // Mean returns the mean value at the time the snapshot was taken. -func (s *SampleSnapshot) Mean() float64 { return SampleMean(s.values) } +func (s *sampleSnapshot) Mean() float64 { return s.mean } // Min returns the minimal value at the time the snapshot was taken. -func (s *SampleSnapshot) Min() int64 { return SampleMin(s.values) } +func (s *sampleSnapshot) Min() int64 { return s.min } // Percentile returns an arbitrary percentile of values at the time the // snapshot was taken. -func (s *SampleSnapshot) Percentile(p float64) float64 { +func (s *sampleSnapshot) Percentile(p float64) float64 { return SamplePercentile(s.values, p) } // Percentiles returns a slice of arbitrary percentiles of values at the time // the snapshot was taken. -func (s *SampleSnapshot) Percentiles(ps []float64) []float64 { - return SamplePercentiles(s.values, ps) +func (s *sampleSnapshot) Percentiles(ps []float64) []float64 { + return CalculatePercentiles(s.values, ps) } // Size returns the size of the sample at the time the snapshot was taken. -func (s *SampleSnapshot) Size() int { return len(s.values) } +func (s *sampleSnapshot) Size() int { return len(s.values) } // Snapshot returns the snapshot. -func (s *SampleSnapshot) Snapshot() Sample { return s } +func (s *sampleSnapshot) Snapshot() SampleSnapshot { return s } // StdDev returns the standard deviation of values at the time the snapshot was // taken. -func (s *SampleSnapshot) StdDev() float64 { return SampleStdDev(s.values) } +func (s *sampleSnapshot) StdDev() float64 { + if s.variance == 0.0 { + s.variance = SampleVariance(s.mean, s.values) + } + return math.Sqrt(s.variance) +} // Sum returns the sum of values at the time the snapshot was taken. -func (s *SampleSnapshot) Sum() int64 { return SampleSum(s.values) } - -// Update panics. -func (*SampleSnapshot) Update(int64) { - panic("Update called on a SampleSnapshot") -} +func (s *sampleSnapshot) Sum() int64 { return s.sum } // Values returns a copy of the values in the sample. -func (s *SampleSnapshot) Values() []int64 { +func (s *sampleSnapshot) Values() []int64 { values := make([]int64, len(s.values)) copy(values, s.values) return values } // Variance returns the variance of values at the time the snapshot was taken. -func (s *SampleSnapshot) Variance() float64 { return SampleVariance(s.values) } - -// SampleStdDev returns the standard deviation of the slice of int64. -func SampleStdDev(values []int64) float64 { - return math.Sqrt(SampleVariance(values)) -} - -// SampleSum returns the sum of the slice of int64. -func SampleSum(values []int64) int64 { - var sum int64 - for _, v := range values { - sum += v +func (s *sampleSnapshot) Variance() float64 { + if s.variance == 0.0 { + s.variance = SampleVariance(s.mean, s.values) } - return sum + return s.variance } // SampleVariance returns the variance of the slice of int64. -func SampleVariance(values []int64) float64 { +func SampleVariance(mean float64, values []int64) float64 { if len(values) == 0 { return 0.0 } - m := SampleMean(values) var sum float64 for _, v := range values { - d := float64(v) - m + d := float64(v) - mean sum += d * d } return sum / float64(len(values)) @@ -445,83 +340,14 @@ func (s *UniformSample) Clear() { s.values = make([]int64, 0, s.reservoirSize) } -// Count returns the number of samples recorded, which may exceed the -// reservoir size. -func (s *UniformSample) Count() int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return s.count -} - -// Max returns the maximum value in the sample, which may not be the maximum -// value ever to be part of the sample. -func (s *UniformSample) Max() int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SampleMax(s.values) -} - -// Mean returns the mean of the values in the sample. -func (s *UniformSample) Mean() float64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SampleMean(s.values) -} - -// Min returns the minimum value in the sample, which may not be the minimum -// value ever to be part of the sample. -func (s *UniformSample) Min() int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SampleMin(s.values) -} - -// Percentile returns an arbitrary percentile of values in the sample. -func (s *UniformSample) Percentile(p float64) float64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SamplePercentile(s.values, p) -} - -// Percentiles returns a slice of arbitrary percentiles of values in the -// sample. -func (s *UniformSample) Percentiles(ps []float64) []float64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SamplePercentiles(s.values, ps) -} - -// Size returns the size of the sample, which is at most the reservoir size. -func (s *UniformSample) Size() int { - s.mutex.Lock() - defer s.mutex.Unlock() - return len(s.values) -} - // Snapshot returns a read-only copy of the sample. -func (s *UniformSample) Snapshot() Sample { +func (s *UniformSample) Snapshot() SampleSnapshot { s.mutex.Lock() - defer s.mutex.Unlock() values := make([]int64, len(s.values)) copy(values, s.values) - return &SampleSnapshot{ - count: s.count, - values: values, - } -} - -// StdDev returns the standard deviation of the values in the sample. -func (s *UniformSample) StdDev() float64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SampleStdDev(s.values) -} - -// Sum returns the sum of the values in the sample. -func (s *UniformSample) Sum() int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SampleSum(s.values) + count := s.count + s.mutex.Unlock() + return newSampleSnapshot(count, values) } // Update samples a new value. @@ -544,22 +370,6 @@ func (s *UniformSample) Update(v int64) { } } -// Values returns a copy of the values in the sample. -func (s *UniformSample) Values() []int64 { - s.mutex.Lock() - defer s.mutex.Unlock() - values := make([]int64, len(s.values)) - copy(values, s.values) - return values -} - -// Variance returns the variance of the values in the sample. -func (s *UniformSample) Variance() float64 { - s.mutex.Lock() - defer s.mutex.Unlock() - return SampleVariance(s.values) -} - // expDecaySample represents an individual sample in a heap. type expDecaySample struct { k float64 diff --git a/metrics/sample_test.go b/metrics/sample_test.go index 3ae128d56f..7967357055 100644 --- a/metrics/sample_test.go +++ b/metrics/sample_test.go @@ -8,28 +8,36 @@ import ( "time" ) +const epsilonPercentile = .00000000001 + // Benchmark{Compute,Copy}{1000,1000000} demonstrate that, even for relatively // expensive computations like Variance, the cost of copying the Sample, as // approximated by a make and copy, is much greater than the cost of the // computation for small samples and only slightly less for large samples. func BenchmarkCompute1000(b *testing.B) { s := make([]int64, 1000) + var sum int64 for i := 0; i < len(s); i++ { s[i] = int64(i) + sum += int64(i) } + mean := float64(sum) / float64(len(s)) b.ResetTimer() for i := 0; i < b.N; i++ { - SampleVariance(s) + SampleVariance(mean, s) } } func BenchmarkCompute1000000(b *testing.B) { s := make([]int64, 1000000) + var sum int64 for i := 0; i < len(s); i++ { s[i] = int64(i) + sum += int64(i) } + mean := float64(sum) / float64(len(s)) b.ResetTimer() for i := 0; i < b.N; i++ { - SampleVariance(s) + SampleVariance(mean, s) } } func BenchmarkCopy1000(b *testing.B) { @@ -79,65 +87,42 @@ func BenchmarkUniformSample1028(b *testing.B) { benchmarkSample(b, NewUniformSample(1028)) } -func TestExpDecaySample10(t *testing.T) { - s := NewExpDecaySample(100, 0.99) - for i := 0; i < 10; i++ { - s.Update(int64(i)) - } - if size := s.Count(); size != 10 { - t.Errorf("s.Count(): 10 != %v\n", size) - } - if size := s.Size(); size != 10 { - t.Errorf("s.Size(): 10 != %v\n", size) - } - if l := len(s.Values()); l != 10 { - t.Errorf("len(s.Values()): 10 != %v\n", l) - } - for _, v := range s.Values() { - if v > 10 || v < 0 { - t.Errorf("out of range [0, 10): %v\n", v) - } +func min(a, b int) int { + if a < b { + return a } + return b } -func TestExpDecaySample100(t *testing.T) { - s := NewExpDecaySample(1000, 0.01) - for i := 0; i < 100; i++ { - s.Update(int64(i)) - } - if size := s.Count(); size != 100 { - t.Errorf("s.Count(): 100 != %v\n", size) - } - if size := s.Size(); size != 100 { - t.Errorf("s.Size(): 100 != %v\n", size) - } - if l := len(s.Values()); l != 100 { - t.Errorf("len(s.Values()): 100 != %v\n", l) - } - for _, v := range s.Values() { - if v > 100 || v < 0 { - t.Errorf("out of range [0, 100): %v\n", v) +func TestExpDecaySample(t *testing.T) { + for _, tc := range []struct { + reservoirSize int + alpha float64 + updates int + }{ + {100, 0.99, 10}, + {1000, 0.01, 100}, + {100, 0.99, 1000}, + } { + sample := NewExpDecaySample(tc.reservoirSize, tc.alpha) + for i := 0; i < tc.updates; i++ { + sample.Update(int64(i)) } - } -} - -func TestExpDecaySample1000(t *testing.T) { - s := NewExpDecaySample(100, 0.99) - for i := 0; i < 1000; i++ { - s.Update(int64(i)) - } - if size := s.Count(); size != 1000 { - t.Errorf("s.Count(): 1000 != %v\n", size) - } - if size := s.Size(); size != 100 { - t.Errorf("s.Size(): 100 != %v\n", size) - } - if l := len(s.Values()); l != 100 { - t.Errorf("len(s.Values()): 100 != %v\n", l) - } - for _, v := range s.Values() { - if v > 1000 || v < 0 { - t.Errorf("out of range [0, 1000): %v\n", v) + snap := sample.Snapshot() + if have, want := int(snap.Count()), tc.updates; have != want { + t.Errorf("have %d want %d", have, want) + } + if have, want := snap.Size(), min(tc.updates, tc.reservoirSize); have != want { + t.Errorf("have %d want %d", have, want) + } + values := snap.(*sampleSnapshot).values + if have, want := len(values), min(tc.updates, tc.reservoirSize); have != want { + t.Errorf("have %d want %d", have, want) + } + for _, v := range values { + if v > int64(tc.updates) || v < 0 { + t.Errorf("out of range [0, %d): %v", tc.updates, v) + } } } } @@ -147,15 +132,16 @@ func TestExpDecaySample1000(t *testing.T) { // The priority becomes +Inf quickly after starting if this is done, // effectively freezing the set of samples until a rescale step happens. func TestExpDecaySampleNanosecondRegression(t *testing.T) { - s := NewExpDecaySample(100, 0.99) + sw := NewExpDecaySample(100, 0.99) for i := 0; i < 100; i++ { - s.Update(10) + sw.Update(10) } time.Sleep(1 * time.Millisecond) for i := 0; i < 100; i++ { - s.Update(20) + sw.Update(20) } - v := s.Values() + s := sw.Snapshot() + v := s.(*sampleSnapshot).values avg := float64(0) for i := 0; i < len(v); i++ { avg += float64(v[i]) @@ -194,24 +180,27 @@ func TestExpDecaySampleStatistics(t *testing.T) { for i := 1; i <= 10000; i++ { s.(*ExpDecaySample).update(now.Add(time.Duration(i)), int64(i)) } - testExpDecaySampleStatistics(t, s) + testExpDecaySampleStatistics(t, s.Snapshot()) } func TestUniformSample(t *testing.T) { - s := NewUniformSample(100) + sw := NewUniformSample(100) for i := 0; i < 1000; i++ { - s.Update(int64(i)) + sw.Update(int64(i)) } + s := sw.Snapshot() if size := s.Count(); size != 1000 { t.Errorf("s.Count(): 1000 != %v\n", size) } if size := s.Size(); size != 100 { t.Errorf("s.Size(): 100 != %v\n", size) } - if l := len(s.Values()); l != 100 { + values := s.(*sampleSnapshot).values + + if l := len(values); l != 100 { t.Errorf("len(s.Values()): 100 != %v\n", l) } - for _, v := range s.Values() { + for _, v := range values { if v > 1000 || v < 0 { t.Errorf("out of range [0, 100): %v\n", v) } @@ -219,12 +208,13 @@ func TestUniformSample(t *testing.T) { } func TestUniformSampleIncludesTail(t *testing.T) { - s := NewUniformSample(100) + sw := NewUniformSample(100) max := 100 for i := 0; i < max; i++ { - s.Update(int64(i)) + sw.Update(int64(i)) } - v := s.Values() + s := sw.Snapshot() + v := s.(*sampleSnapshot).values sum := 0 exp := (max - 1) * max / 2 for i := 0; i < len(v); i++ { @@ -250,7 +240,7 @@ func TestUniformSampleStatistics(t *testing.T) { for i := 1; i <= 10000; i++ { s.Update(int64(i)) } - testUniformSampleStatistics(t, s) + testUniformSampleStatistics(t, s.Snapshot()) } func benchmarkSample(b *testing.B, s Sample) { @@ -267,7 +257,7 @@ func benchmarkSample(b *testing.B, s Sample) { b.Logf("GC cost: %d ns/op", int(memStats.PauseTotalNs-pauseTotalNs)/b.N) } -func testExpDecaySampleStatistics(t *testing.T, s Sample) { +func testExpDecaySampleStatistics(t *testing.T, s SampleSnapshot) { if count := s.Count(); count != 10000 { t.Errorf("s.Count(): 10000 != %v\n", count) } @@ -295,7 +285,7 @@ func testExpDecaySampleStatistics(t *testing.T, s Sample) { } } -func testUniformSampleStatistics(t *testing.T, s Sample) { +func testUniformSampleStatistics(t *testing.T, s SampleSnapshot) { if count := s.Count(); count != 10000 { t.Errorf("s.Count(): 10000 != %v\n", count) } @@ -349,8 +339,22 @@ func TestUniformSampleConcurrentUpdateCount(t *testing.T) { } }() for i := 0; i < 1000; i++ { - s.Count() + s.Snapshot().Count() time.Sleep(5 * time.Millisecond) } quit <- struct{}{} } + +func BenchmarkCalculatePercentiles(b *testing.B) { + pss := []float64{0.5, 0.75, 0.95, 0.99, 0.999, 0.9999} + var vals []int64 + for i := 0; i < 1000; i++ { + vals = append(vals, int64(rand.Int31())) + } + v := make([]int64, len(vals)) + b.ResetTimer() + for i := 0; i < b.N; i++ { + copy(v, vals) + _ = CalculatePercentiles(v, pss) + } +} diff --git a/metrics/syslog.go b/metrics/syslog.go index 76c8490567..fd856d6973 100644 --- a/metrics/syslog.go +++ b/metrics/syslog.go @@ -16,15 +16,15 @@ func Syslog(r Registry, d time.Duration, w *syslog.Writer) { r.Each(func(name string, i interface{}) { switch metric := i.(type) { case Counter: - w.Info(fmt.Sprintf("counter %s: count: %d", name, metric.Count())) + w.Info(fmt.Sprintf("counter %s: count: %d", name, metric.Snapshot().Count())) case CounterFloat64: - w.Info(fmt.Sprintf("counter %s: count: %f", name, metric.Count())) + w.Info(fmt.Sprintf("counter %s: count: %f", name, metric.Snapshot().Count())) case Gauge: - w.Info(fmt.Sprintf("gauge %s: value: %d", name, metric.Value())) + w.Info(fmt.Sprintf("gauge %s: value: %d", name, metric.Snapshot().Value())) case GaugeFloat64: - w.Info(fmt.Sprintf("gauge %s: value: %f", name, metric.Value())) + w.Info(fmt.Sprintf("gauge %s: value: %f", name, metric.Snapshot().Value())) case GaugeInfo: - w.Info(fmt.Sprintf("gauge %s: value: %s", name, metric.Value())) + w.Info(fmt.Sprintf("gauge %s: value: %s", name, metric.Snapshot().Value())) case Healthcheck: metric.Check() w.Info(fmt.Sprintf("healthcheck %s: error: %v", name, metric.Error())) diff --git a/metrics/testdata/opentsb.want b/metrics/testdata/opentsb.want index c8e40a5250..43fe1b2ac2 100644 --- a/metrics/testdata/opentsb.want +++ b/metrics/testdata/opentsb.want @@ -1,4 +1,4 @@ -put pre.elite.count 978307200 0 host=hal9000 +put pre.elite.count 978307200 1337 host=hal9000 put pre.elite.one-minute 978307200 0.00 host=hal9000 put pre.elite.five-minute 978307200 0.00 host=hal9000 put pre.elite.fifteen-minute 978307200 0.00 host=hal9000 diff --git a/metrics/timer.go b/metrics/timer.go index 2e1a9be472..576ad8aa3e 100644 --- a/metrics/timer.go +++ b/metrics/timer.go @@ -5,26 +5,18 @@ import ( "time" ) +type TimerSnapshot interface { + HistogramSnapshot + MeterSnapshot +} + // Timers capture the duration and rate of events. type Timer interface { - Count() int64 - Max() int64 - Mean() float64 - Min() int64 - Percentile(float64) float64 - Percentiles([]float64) []float64 - Rate1() float64 - Rate5() float64 - Rate15() float64 - RateMean() float64 - Snapshot() Timer - StdDev() float64 + Snapshot() TimerSnapshot Stop() - Sum() int64 Time(func()) - Update(time.Duration) UpdateSince(time.Time) - Variance() float64 + Update(time.Duration) } // GetOrRegisterTimer returns an existing Timer or constructs and registers a @@ -78,61 +70,11 @@ func NewTimer() Timer { // NilTimer is a no-op Timer. type NilTimer struct{} -// Count is a no-op. -func (NilTimer) Count() int64 { return 0 } - -// Max is a no-op. -func (NilTimer) Max() int64 { return 0 } - -// Mean is a no-op. -func (NilTimer) Mean() float64 { return 0.0 } - -// Min is a no-op. -func (NilTimer) Min() int64 { return 0 } - -// Percentile is a no-op. -func (NilTimer) Percentile(p float64) float64 { return 0.0 } - -// Percentiles is a no-op. -func (NilTimer) Percentiles(ps []float64) []float64 { - return make([]float64, len(ps)) -} - -// Rate1 is a no-op. -func (NilTimer) Rate1() float64 { return 0.0 } - -// Rate5 is a no-op. -func (NilTimer) Rate5() float64 { return 0.0 } - -// Rate15 is a no-op. -func (NilTimer) Rate15() float64 { return 0.0 } - -// RateMean is a no-op. -func (NilTimer) RateMean() float64 { return 0.0 } - -// Snapshot is a no-op. -func (NilTimer) Snapshot() Timer { return NilTimer{} } - -// StdDev is a no-op. -func (NilTimer) StdDev() float64 { return 0.0 } - -// Stop is a no-op. -func (NilTimer) Stop() {} - -// Sum is a no-op. -func (NilTimer) Sum() int64 { return 0 } - -// Time is a no-op. -func (NilTimer) Time(f func()) { f() } - -// Update is a no-op. -func (NilTimer) Update(time.Duration) {} - -// UpdateSince is a no-op. -func (NilTimer) UpdateSince(time.Time) {} - -// Variance is a no-op. -func (NilTimer) Variance() float64 { return 0.0 } +func (NilTimer) Snapshot() TimerSnapshot { return (*emptySnapshot)(nil) } +func (NilTimer) Stop() {} +func (NilTimer) Time(f func()) { f() } +func (NilTimer) Update(time.Duration) {} +func (NilTimer) UpdateSince(time.Time) {} // StandardTimer is the standard implementation of a Timer and uses a Histogram // and Meter. @@ -142,82 +84,21 @@ type StandardTimer struct { mutex sync.Mutex } -// Count returns the number of events recorded. -func (t *StandardTimer) Count() int64 { - return t.histogram.Count() -} - -// Max returns the maximum value in the sample. -func (t *StandardTimer) Max() int64 { - return t.histogram.Max() -} - -// Mean returns the mean of the values in the sample. -func (t *StandardTimer) Mean() float64 { - return t.histogram.Mean() -} - -// Min returns the minimum value in the sample. -func (t *StandardTimer) Min() int64 { - return t.histogram.Min() -} - -// Percentile returns an arbitrary percentile of the values in the sample. -func (t *StandardTimer) Percentile(p float64) float64 { - return t.histogram.Percentile(p) -} - -// Percentiles returns a slice of arbitrary percentiles of the values in the -// sample. -func (t *StandardTimer) Percentiles(ps []float64) []float64 { - return t.histogram.Percentiles(ps) -} - -// Rate1 returns the one-minute moving average rate of events per second. -func (t *StandardTimer) Rate1() float64 { - return t.meter.Rate1() -} - -// Rate5 returns the five-minute moving average rate of events per second. -func (t *StandardTimer) Rate5() float64 { - return t.meter.Rate5() -} - -// Rate15 returns the fifteen-minute moving average rate of events per second. -func (t *StandardTimer) Rate15() float64 { - return t.meter.Rate15() -} - -// RateMean returns the meter's mean rate of events per second. -func (t *StandardTimer) RateMean() float64 { - return t.meter.RateMean() -} - // Snapshot returns a read-only copy of the timer. -func (t *StandardTimer) Snapshot() Timer { +func (t *StandardTimer) Snapshot() TimerSnapshot { t.mutex.Lock() defer t.mutex.Unlock() - return &TimerSnapshot{ - histogram: t.histogram.Snapshot().(*HistogramSnapshot), - meter: t.meter.Snapshot().(*MeterSnapshot), + return &timerSnapshot{ + histogram: t.histogram.Snapshot(), + meter: t.meter.Snapshot(), } } -// StdDev returns the standard deviation of the values in the sample. -func (t *StandardTimer) StdDev() float64 { - return t.histogram.StdDev() -} - // Stop stops the meter. func (t *StandardTimer) Stop() { t.meter.Stop() } -// Sum returns the sum in the sample. -func (t *StandardTimer) Sum() int64 { - return t.histogram.Sum() -} - // Record the duration of the execution of the given function. func (t *StandardTimer) Time(f func()) { ts := time.Now() @@ -241,86 +122,63 @@ func (t *StandardTimer) UpdateSince(ts time.Time) { t.meter.Mark(1) } -// Variance returns the variance of the values in the sample. -func (t *StandardTimer) Variance() float64 { - return t.histogram.Variance() -} - -// TimerSnapshot is a read-only copy of another Timer. -type TimerSnapshot struct { - histogram *HistogramSnapshot - meter *MeterSnapshot +// timerSnapshot is a read-only copy of another Timer. +type timerSnapshot struct { + histogram HistogramSnapshot + meter MeterSnapshot } // Count returns the number of events recorded at the time the snapshot was // taken. -func (t *TimerSnapshot) Count() int64 { return t.histogram.Count() } +func (t *timerSnapshot) Count() int64 { return t.histogram.Count() } // Max returns the maximum value at the time the snapshot was taken. -func (t *TimerSnapshot) Max() int64 { return t.histogram.Max() } +func (t *timerSnapshot) Max() int64 { return t.histogram.Max() } + +// Size returns the size of the sample at the time the snapshot was taken. +func (t *timerSnapshot) Size() int { return t.histogram.Size() } // Mean returns the mean value at the time the snapshot was taken. -func (t *TimerSnapshot) Mean() float64 { return t.histogram.Mean() } +func (t *timerSnapshot) Mean() float64 { return t.histogram.Mean() } // Min returns the minimum value at the time the snapshot was taken. -func (t *TimerSnapshot) Min() int64 { return t.histogram.Min() } +func (t *timerSnapshot) Min() int64 { return t.histogram.Min() } // Percentile returns an arbitrary percentile of sampled values at the time the // snapshot was taken. -func (t *TimerSnapshot) Percentile(p float64) float64 { +func (t *timerSnapshot) Percentile(p float64) float64 { return t.histogram.Percentile(p) } // Percentiles returns a slice of arbitrary percentiles of sampled values at // the time the snapshot was taken. -func (t *TimerSnapshot) Percentiles(ps []float64) []float64 { +func (t *timerSnapshot) Percentiles(ps []float64) []float64 { return t.histogram.Percentiles(ps) } // Rate1 returns the one-minute moving average rate of events per second at the // time the snapshot was taken. -func (t *TimerSnapshot) Rate1() float64 { return t.meter.Rate1() } +func (t *timerSnapshot) Rate1() float64 { return t.meter.Rate1() } // Rate5 returns the five-minute moving average rate of events per second at // the time the snapshot was taken. -func (t *TimerSnapshot) Rate5() float64 { return t.meter.Rate5() } +func (t *timerSnapshot) Rate5() float64 { return t.meter.Rate5() } // Rate15 returns the fifteen-minute moving average rate of events per second // at the time the snapshot was taken. -func (t *TimerSnapshot) Rate15() float64 { return t.meter.Rate15() } +func (t *timerSnapshot) Rate15() float64 { return t.meter.Rate15() } // RateMean returns the meter's mean rate of events per second at the time the // snapshot was taken. -func (t *TimerSnapshot) RateMean() float64 { return t.meter.RateMean() } - -// Snapshot returns the snapshot. -func (t *TimerSnapshot) Snapshot() Timer { return t } +func (t *timerSnapshot) RateMean() float64 { return t.meter.RateMean() } // StdDev returns the standard deviation of the values at the time the snapshot // was taken. -func (t *TimerSnapshot) StdDev() float64 { return t.histogram.StdDev() } - -// Stop is a no-op. -func (t *TimerSnapshot) Stop() {} +func (t *timerSnapshot) StdDev() float64 { return t.histogram.StdDev() } // Sum returns the sum at the time the snapshot was taken. -func (t *TimerSnapshot) Sum() int64 { return t.histogram.Sum() } - -// Time panics. -func (*TimerSnapshot) Time(func()) { - panic("Time called on a TimerSnapshot") -} - -// Update panics. -func (*TimerSnapshot) Update(time.Duration) { - panic("Update called on a TimerSnapshot") -} - -// UpdateSince panics. -func (*TimerSnapshot) UpdateSince(time.Time) { - panic("UpdateSince called on a TimerSnapshot") -} +func (t *timerSnapshot) Sum() int64 { return t.histogram.Sum() } // Variance returns the variance of the values at the time the snapshot was // taken. -func (t *TimerSnapshot) Variance() float64 { return t.histogram.Variance() } +func (t *timerSnapshot) Variance() float64 { return t.histogram.Variance() } diff --git a/metrics/timer_test.go b/metrics/timer_test.go index 903e8e8d49..f10de16c9c 100644 --- a/metrics/timer_test.go +++ b/metrics/timer_test.go @@ -18,7 +18,7 @@ func BenchmarkTimer(b *testing.B) { func TestGetOrRegisterTimer(t *testing.T) { r := NewRegistry() NewRegisteredTimer("foo", r).Update(47) - if tm := GetOrRegisterTimer("foo", r); tm.Count() != 1 { + if tm := GetOrRegisterTimer("foo", r).Snapshot(); tm.Count() != 1 { t.Fatal(tm) } } @@ -27,7 +27,7 @@ func TestTimerExtremes(t *testing.T) { tm := NewTimer() tm.Update(math.MaxInt64) tm.Update(0) - if stdDev := tm.StdDev(); stdDev != 4.611686018427388e+18 { + if stdDev := tm.Snapshot().StdDev(); stdDev != 4.611686018427388e+18 { t.Errorf("tm.StdDev(): 4.611686018427388e+18 != %v\n", stdDev) } } @@ -56,7 +56,7 @@ func TestTimerFunc(t *testing.T) { }) var ( drift = time.Millisecond * 2 - measured = time.Duration(tm.Max()) + measured = time.Duration(tm.Snapshot().Max()) ceil = actualTime + drift floor = actualTime - drift ) @@ -66,7 +66,7 @@ func TestTimerFunc(t *testing.T) { } func TestTimerZero(t *testing.T) { - tm := NewTimer() + tm := NewTimer().Snapshot() if count := tm.Count(); count != 0 { t.Errorf("tm.Count(): 0 != %v\n", count) } @@ -110,5 +110,5 @@ func ExampleGetOrRegisterTimer() { m := "account.create.latency" t := GetOrRegisterTimer(m, nil) t.Update(47) - fmt.Println(t.Max()) // Output: 47 + fmt.Println(t.Snapshot().Max()) // Output: 47 } diff --git a/metrics/writer.go b/metrics/writer.go index ec2e4f8c6a..098da45c27 100644 --- a/metrics/writer.go +++ b/metrics/writer.go @@ -29,19 +29,19 @@ func WriteOnce(r Registry, w io.Writer) { switch metric := namedMetric.m.(type) { case Counter: fmt.Fprintf(w, "counter %s\n", namedMetric.name) - fmt.Fprintf(w, " count: %9d\n", metric.Count()) + fmt.Fprintf(w, " count: %9d\n", metric.Snapshot().Count()) case CounterFloat64: fmt.Fprintf(w, "counter %s\n", namedMetric.name) - fmt.Fprintf(w, " count: %f\n", metric.Count()) + fmt.Fprintf(w, " count: %f\n", metric.Snapshot().Count()) case Gauge: fmt.Fprintf(w, "gauge %s\n", namedMetric.name) - fmt.Fprintf(w, " value: %9d\n", metric.Value()) + fmt.Fprintf(w, " value: %9d\n", metric.Snapshot().Value()) case GaugeFloat64: fmt.Fprintf(w, "gauge %s\n", namedMetric.name) - fmt.Fprintf(w, " value: %f\n", metric.Value()) + fmt.Fprintf(w, " value: %f\n", metric.Snapshot().Value()) case GaugeInfo: fmt.Fprintf(w, "gauge %s\n", namedMetric.name) - fmt.Fprintf(w, " value: %s\n", metric.Value().String()) + fmt.Fprintf(w, " value: %s\n", metric.Snapshot().Value().String()) case Healthcheck: metric.Check() fmt.Fprintf(w, "healthcheck %s\n", namedMetric.name) diff --git a/vendor/github.com/anacrolix/torrent/.gitignore b/vendor/github.com/anacrolix/torrent/.gitignore index d92c6d5bfd..0c15585de6 100644 --- a/vendor/github.com/anacrolix/torrent/.gitignore +++ b/vendor/github.com/anacrolix/torrent/.gitignore @@ -1,3 +1,5 @@ .idea *-run.gob .envrc* +.DS_Store +go.work* \ No newline at end of file diff --git a/vendor/github.com/anacrolix/torrent/config.go b/vendor/github.com/anacrolix/torrent/config.go index 0c029a7e2c..e2d0ea1ebe 100644 --- a/vendor/github.com/anacrolix/torrent/config.go +++ b/vendor/github.com/anacrolix/torrent/config.go @@ -188,6 +188,8 @@ type ClientConfig struct { ICEServers []string DialRateLimiter *rate.Limiter + + PieceHashersPerTorrent int // default: 2 } func (cfg *ClientConfig) SetListenAddr(addr string) *ClientConfig { @@ -225,13 +227,14 @@ func NewDefaultClientConfig() *ClientConfig { Preferred: true, RequirePreferred: false, }, - CryptoSelector: mse.DefaultCryptoSelector, - CryptoProvides: mse.AllSupportedCrypto, - ListenPort: 42069, - Extensions: defaultPeerExtensionBytes(), - AcceptPeerConnections: true, - MaxUnverifiedBytes: 64 << 20, - DialRateLimiter: rate.NewLimiter(10, 10), + CryptoSelector: mse.DefaultCryptoSelector, + CryptoProvides: mse.AllSupportedCrypto, + ListenPort: 42069, + Extensions: defaultPeerExtensionBytes(), + AcceptPeerConnections: true, + MaxUnverifiedBytes: 64 << 20, + DialRateLimiter: rate.NewLimiter(10, 10), + PieceHashersPerTorrent: 2, } cc.DhtStartingNodes = func(network string) dht.StartingNodesGetter { return func() ([]dht.Addr, error) { return dht.GlobalBootstrapAddrs(network) } diff --git a/vendor/github.com/anacrolix/torrent/torrent.go b/vendor/github.com/anacrolix/torrent/torrent.go index 5f6ddf394e..8b47452188 100644 --- a/vendor/github.com/anacrolix/torrent/torrent.go +++ b/vendor/github.com/anacrolix/torrent/torrent.go @@ -2251,7 +2251,7 @@ func (t *Torrent) onIncompletePiece(piece pieceIndex) { } func (t *Torrent) tryCreateMorePieceHashers() { - for !t.closed.IsSet() && t.activePieceHashes < 2 && t.tryCreatePieceHasher() { + for !t.closed.IsSet() && t.activePieceHashes < t.cl.config.PieceHashersPerTorrent && t.tryCreatePieceHasher() { } } diff --git a/vendor/modules.txt b/vendor/modules.txt index 2d1f0c336f..d17048c0e6 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -43,7 +43,7 @@ github.com/CortexFoundation/robot/backend # github.com/CortexFoundation/statik v0.0.0-20210315012922-8bb8a7b5dc66 ## explicit; go 1.16 github.com/CortexFoundation/statik -# github.com/CortexFoundation/torrentfs v1.0.54-0.20230912084150-c5147dcb0ff7 +# github.com/CortexFoundation/torrentfs v1.0.54-0.20230913182816-d7428d1e9e55 ## explicit; go 1.21 github.com/CortexFoundation/torrentfs github.com/CortexFoundation/torrentfs/backend @@ -137,7 +137,7 @@ github.com/anacrolix/stm/stmutil # github.com/anacrolix/sync v0.4.0 ## explicit; go 1.13 github.com/anacrolix/sync -# github.com/anacrolix/torrent v1.52.6-0.20230911001013-87f6cdc1e96f +# github.com/anacrolix/torrent v1.52.6-0.20230913111536-bd2839cb9ca1 ## explicit; go 1.21 github.com/anacrolix/torrent github.com/anacrolix/torrent/analysis