100 lines
2.1 KiB
Go
100 lines
2.1 KiB
Go
// +build linux
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package fs
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import (
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"bufio"
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"os"
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"path/filepath"
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"strconv"
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"github.com/opencontainers/runc/libcontainer/cgroups"
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"github.com/opencontainers/runc/libcontainer/configs"
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)
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type CpuGroup struct {
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}
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func (s *CpuGroup) Name() string {
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return "cpu"
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}
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func (s *CpuGroup) Apply(d *cgroupData) error {
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// We always want to join the cpu group, to allow fair cpu scheduling
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// on a container basis
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dir, err := d.join("cpu")
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if err != nil && !cgroups.IsNotFound(err) {
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return err
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}
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if err := s.Set(dir, d.config); err != nil {
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return err
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}
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return nil
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}
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func (s *CpuGroup) Set(path string, cgroup *configs.Cgroup) error {
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if cgroup.CpuShares != 0 {
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if err := writeFile(path, "cpu.shares", strconv.FormatInt(cgroup.CpuShares, 10)); err != nil {
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return err
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}
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}
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if cgroup.CpuPeriod != 0 {
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if err := writeFile(path, "cpu.cfs_period_us", strconv.FormatInt(cgroup.CpuPeriod, 10)); err != nil {
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return err
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}
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}
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if cgroup.CpuQuota != 0 {
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if err := writeFile(path, "cpu.cfs_quota_us", strconv.FormatInt(cgroup.CpuQuota, 10)); err != nil {
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return err
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}
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}
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if cgroup.CpuRtPeriod != 0 {
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if err := writeFile(path, "cpu.rt_period_us", strconv.FormatInt(cgroup.CpuRtPeriod, 10)); err != nil {
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return err
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}
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}
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if cgroup.CpuRtRuntime != 0 {
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if err := writeFile(path, "cpu.rt_runtime_us", strconv.FormatInt(cgroup.CpuRtRuntime, 10)); err != nil {
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return err
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}
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}
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return nil
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}
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func (s *CpuGroup) Remove(d *cgroupData) error {
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return removePath(d.path("cpu"))
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}
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func (s *CpuGroup) GetStats(path string, stats *cgroups.Stats) error {
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f, err := os.Open(filepath.Join(path, "cpu.stat"))
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return err
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}
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defer f.Close()
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sc := bufio.NewScanner(f)
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for sc.Scan() {
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t, v, err := getCgroupParamKeyValue(sc.Text())
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if err != nil {
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return err
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}
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switch t {
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case "nr_periods":
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stats.CpuStats.ThrottlingData.Periods = v
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case "nr_throttled":
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stats.CpuStats.ThrottlingData.ThrottledPeriods = v
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case "throttled_time":
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stats.CpuStats.ThrottlingData.ThrottledTime = v
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}
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}
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return nil
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}
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