- nextSample := &CpuSample{time.Now(), 0, 0, GetCpuCount(stderr, cgroup)}
- var userTicks, sysTicks int64
- fmt.Sscanf(string(b), "user %d\nsystem %d", &nextSample.user, &nextSample.sys)
- user_hz := float64(C.sysconf(C._SC_CLK_TCK))
- nextSample.user = float64(userTicks) / user_hz
- nextSample.sys = float64(sysTicks) / user_hz
-
- delta := ""
- if lastSample != nil {
- delta = fmt.Sprintf(" -- interval %.4f seconds %.4f user %.4f sys",
- nextSample.sampleTime.Sub(lastSample.sampleTime).Seconds(),
- nextSample.user - lastSample.user,
- nextSample.sys - lastSample.sys)
- }
- stderr <- fmt.Sprintf("crunchstat: cpu %.4f user %.4f sys %d cpus%s",
- nextSample.user, nextSample.sys, nextSample.cpus, delta)
- return nextSample
-}
-
-func PollCgroupStats(cgroup Cgroup, stderr chan string, poll int64, stop_poll_chan <-chan bool) {
- var lastNetSample map[string]IoSample = nil
- var lastDiskSample map[string]IoSample = nil
- var lastCpuSample *CpuSample = nil
-
- poll_chan := make(chan bool, 1)
- go func() {
- // Send periodic poll events.
- poll_chan <- true
- for {
- time.Sleep(time.Duration(poll) * time.Millisecond)
- poll_chan <- true
- }
- }()
- for {
- select {
- case <-stop_poll_chan:
- return
- case <-poll_chan:
- // Emit stats, then select again.
- }
- DoMemoryStats(stderr, cgroup)
- lastCpuSample = DoCpuStats(stderr, cgroup, lastCpuSample)
- lastDiskSample = DoBlkIoStats(stderr, cgroup, lastDiskSample)
- lastNetSample = DoNetworkStats(stderr, cgroup, lastNetSample)
- }
-}
-
-func run(logger *log.Logger) error {
-
- var (
- cgroup_root string
- cgroup_parent string
- cgroup_cidfile string
- wait int64
- poll int64
- )
-
- flag.StringVar(&cgroup_root, "cgroup-root", "", "Root of cgroup tree")
- flag.StringVar(&cgroup_parent, "cgroup-parent", "", "Name of container parent under cgroup")
- flag.StringVar(&cgroup_cidfile, "cgroup-cid", "", "Path to container id file")
- flag.Int64Var(&wait, "wait", 5, "Maximum time (in seconds) to wait for cid file to show up")
- flag.Int64Var(&poll, "poll", 1000, "Polling frequency, in milliseconds")
-
- flag.Parse()
-
- if cgroup_root == "" {
- logger.Fatal("Must provide -cgroup-root")