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resources: add build step resource tracking via cgroups
Signed-off-by: Tonis Tiigi <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package resources | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "os" | ||
| "path/filepath" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/moby/buildkit/executor/resources/types" | ||
| ) | ||
|
|
||
| const ( | ||
| cpuUsageUsec = "usage_usec" | ||
| cpuUserUsec = "user_usec" | ||
| cpuSystemUsec = "system_usec" | ||
| cpuNrPeriods = "nr_periods" | ||
| cpuNrThrottled = "nr_throttled" | ||
| cpuThrottledUsec = "throttled_usec" | ||
| ) | ||
|
|
||
| func getCgroupCPUStat(cgroupPath string) (*types.CPUStat, error) { | ||
| cpuStat := &types.CPUStat{} | ||
|
|
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| // Read cpu.stat file | ||
| cpuStatFile, err := os.Open(filepath.Join(cgroupPath, "cpu.stat")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer cpuStatFile.Close() | ||
|
|
||
| scanner := bufio.NewScanner(cpuStatFile) | ||
| for scanner.Scan() { | ||
| line := scanner.Text() | ||
| fields := strings.Fields(line) | ||
|
|
||
| if len(fields) < 2 { | ||
| continue | ||
| } | ||
|
|
||
| key := fields[0] | ||
| value, err := strconv.ParseUint(fields[1], 10, 64) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
|
||
| switch key { | ||
| case cpuUsageUsec: | ||
| cpuStat.UsageNanos = uint64Ptr(value * 1000) | ||
| case cpuUserUsec: | ||
| cpuStat.UserNanos = uint64Ptr(value * 1000) | ||
| case cpuSystemUsec: | ||
| cpuStat.SystemNanos = uint64Ptr(value * 1000) | ||
| case cpuNrPeriods: | ||
| cpuStat.NrPeriods = new(uint32) | ||
| *cpuStat.NrPeriods = uint32(value) | ||
| case cpuNrThrottled: | ||
| cpuStat.NrThrottled = new(uint32) | ||
| *cpuStat.NrThrottled = uint32(value) | ||
| case cpuThrottledUsec: | ||
| cpuStat.ThrottledNanos = uint64Ptr(value * 1000) | ||
| } | ||
| } | ||
|
|
||
| if err := scanner.Err(); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Read cpu.pressure file | ||
| pressure, err := parsePressureFile(filepath.Join(cgroupPath, "cpu.pressure")) | ||
| if err == nil { | ||
| cpuStat.Pressure = pressure | ||
| } | ||
|
|
||
| return cpuStat, nil | ||
| } | ||
| func parsePressureFile(filename string) (*types.Pressure, error) { | ||
| content, err := os.ReadFile(filename) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| lines := strings.Split(string(content), "\n") | ||
|
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| pressure := &types.Pressure{} | ||
| for _, line := range lines { | ||
| // Skip empty lines | ||
| if len(strings.TrimSpace(line)) == 0 { | ||
| continue | ||
| } | ||
|
|
||
| fields := strings.Fields(line) | ||
| prefix := fields[0] | ||
| pressureValues := &types.PressureValues{} | ||
|
|
||
| for i := 1; i < len(fields); i++ { | ||
| keyValue := strings.Split(fields[i], "=") | ||
| key := keyValue[0] | ||
| valueStr := keyValue[1] | ||
|
|
||
| if key == "total" { | ||
| totalValue, err := strconv.ParseUint(valueStr, 10, 64) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| pressureValues.Total = &totalValue | ||
| } else { | ||
| value, err := strconv.ParseFloat(valueStr, 64) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| switch key { | ||
| case "avg10": | ||
| pressureValues.Avg10 = &value | ||
| case "avg60": | ||
| pressureValues.Avg60 = &value | ||
| case "avg300": | ||
| pressureValues.Avg300 = &value | ||
| } | ||
| } | ||
| } | ||
|
|
||
| switch prefix { | ||
| case "some": | ||
| pressure.Some = pressureValues | ||
| case "full": | ||
| pressure.Full = pressureValues | ||
| } | ||
| } | ||
|
|
||
| return pressure, nil | ||
| } |
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