78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
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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"syscall"
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"github.com/dotcloud/docker/pkg/libcontainer/cgroups"
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)
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type cpuGroup struct {
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}
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func (s *cpuGroup) Set(d *data) 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 {
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return err
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}
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if d.c.CpuShares != 0 {
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if err := writeFile(dir, "cpu.shares", strconv.FormatInt(d.c.CpuShares, 10)); err != nil {
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return err
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}
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}
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if d.c.CpuPeriod != 0 {
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if err := writeFile(dir, "cpu.cfs_period_us", strconv.FormatInt(d.c.CpuPeriod, 10)); err != nil {
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return err
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}
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}
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if d.c.CpuQuota != 0 {
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if err := writeFile(dir, "cpu.cfs_quota_us", strconv.FormatInt(d.c.CpuQuota, 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 *data) error {
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return removePath(d.path("cpu"))
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}
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func (s *cpuGroup) GetStats(d *data, stats *cgroups.Stats) error {
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path, err := d.path("cpu")
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if err != nil {
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return err
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}
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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 pathErr, ok := err.(*os.PathError); ok && pathErr.Err == syscall.ENOENT {
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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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