From d628705118faae4083f42eb30cbb14ed451998b2 Mon Sep 17 00:00:00 2001 From: Calvin Kim Date: Tue, 27 Jul 2021 21:44:57 +0900 Subject: [PATCH] btcd: Add memory profiling flag Enables Go memory profiling. If the cpuprofile shows a lot of time spent on gc, it's useful to then do a memory profile to see where the memory alloctions happen. Unlike the --profile flag, this allows for easy generation of a memory profile for the entire duration of which btcd has been running for in various readble graphs. --- btcd.go | 12 ++++++++++++ config.go | 1 + 2 files changed, 13 insertions(+) diff --git a/btcd.go b/btcd.go index aec55e06eb..8f85311734 100644 --- a/btcd.go +++ b/btcd.go @@ -88,6 +88,18 @@ func btcdMain(serverChan chan<- *server) error { defer pprof.StopCPUProfile() } + // Write mem profile if requested. + if cfg.MemoryProfile != "" { + f, err := os.Create(cfg.MemoryProfile) + if err != nil { + btcdLog.Errorf("Unable to create memory profile: %v", err) + return err + } + defer f.Close() + defer pprof.WriteHeapProfile(f) + defer runtime.GC() + } + // Perform upgrades to btcd as new versions require it. if err := doUpgrades(); err != nil { btcdLog.Errorf("%v", err) diff --git a/config.go b/config.go index 5eca3f2174..656e94df2a 100644 --- a/config.go +++ b/config.go @@ -111,6 +111,7 @@ type config struct { ConfigFile string `short:"C" long:"configfile" description:"Path to configuration file"` ConnectPeers []string `long:"connect" description:"Connect only to the specified peers at startup"` CPUProfile string `long:"cpuprofile" description:"Write CPU profile to the specified file"` + MemoryProfile string `long:"memprofile" description:"Write memory profile to the specified file"` DataDir string `short:"b" long:"datadir" description:"Directory to store data"` DbType string `long:"dbtype" description:"Database backend to use for the Block Chain"` DebugLevel string `short:"d" long:"debuglevel" description:"Logging level for all subsystems {trace, debug, info, warn, error, critical} -- You may also specify =,=,... to set the log level for individual subsystems -- Use show to list available subsystems"`