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cgroup: improve test to find cgroup compatibility issues #41347

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merged 10 commits into from
Feb 13, 2023
Merged

cgroup: improve test to find cgroup compatibility issues #41347

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712c756
update
hawkingrei Feb 13, 2023
def5098
fix
hawkingrei Feb 13, 2023
1eb6037
fix
hawkingrei Feb 13, 2023
43ce2d6
fix
hawkingrei Feb 13, 2023
32c7401
fix
hawkingrei Feb 13, 2023
0044ae5
fix
hawkingrei Feb 13, 2023
cf3e65b
fix
hawkingrei Feb 13, 2023
912fdcb
fix
hawkingrei Feb 13, 2023
a95aedc
fix
hawkingrei Feb 13, 2023
d6d2fc7
update
hawkingrei Feb 13, 2023
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4 changes: 3 additions & 1 deletion util/cgroup/cgroup_cpu.go
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,8 @@ import (
"github.com/pingcap/errors"
)

var errNoCPUControllerDetected = errors.New("no cpu controller detected")

// Helper function for getCgroupCPU. Root is always "/", except in tests.
func getCgroupCPU(root string) (CPUUsage, error) {
path, err := detectControlPath(filepath.Join(root, procPathCGroup), "cpu,cpuacct")
Expand All @@ -30,7 +32,7 @@ func getCgroupCPU(root string) (CPUUsage, error) {

// No CPU controller detected
if path == "" {
return CPUUsage{}, errors.New("no cpu controller detected")
return CPUUsage{}, errNoCPUControllerDetected
}

mount, ver, err := getCgroupDetails(filepath.Join(root, procPathMountInfo), path, "cpu,cpuacct")
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10 changes: 7 additions & 3 deletions util/cgroup/cgroup_cpu_test.go
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Expand Up @@ -42,9 +42,13 @@ func TestGetCgroupCPU(t *testing.T) {
}()
}
cpu, err := GetCgroupCPU()
require.NoError(t, err)
require.NotZero(t, cpu.Period)
require.Less(t, int64(1), cpu.Period)
if err == errNoCPUControllerDetected {
require.False(t, InContainer(), "Please check linux version > v4.7.x. This is related to cgroup compatibility.")
} else {
require.NoError(t, err)
require.NotZero(t, cpu.Period)
require.Less(t, int64(1), cpu.Period)
}
close(exit)
wg.Wait()
}