- if blkio_io_service_bytes != "" {
- stderr <- fmt.Sprintf("crunchstat: reading stats from %s", blkio_io_service_bytes)
- }
- if cpuset_cpus != "" {
- stderr <- fmt.Sprintf("crunchstat: reading stats from %s", cpuset_cpus)
- }
- if memory_stat != "" {
- stderr <- fmt.Sprintf("crunchstat: reading stats from %s", memory_stat)
- }
-
- 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 {
- bedtime := time.Now()
- select {
- case <-stop_poll_chan:
- return
- case <-poll_chan:
- // Emit stats, then select again.
- }
- morning := time.Now()
- elapsed := morning.Sub(bedtime).Nanoseconds() / int64(time.Millisecond)
- var cpus int64 = 0
- if cpuset_cpus != "" {
- b, err := OpenAndReadAll(cpuset_cpus, stderr)
- if err != nil {
- // cgroup probably gone -- skip other stats too.
- continue
- }
- sp := strings.Split(string(b), ",")
- for _, v := range sp {
- var min, max int64
- n, _ := fmt.Sscanf(v, "%d-%d", &min, &max)
- if n == 2 {
- cpus += (max - min) + 1
- } else {
- cpus += 1
- }
- }
-
- if cpus != last_cpucount {
- stderr <- fmt.Sprintf("crunchstat: cpuset.cpus %v", cpus)
- }
- last_cpucount = cpus
- }
- if cpus == 0 {
- cpus = 1
- }
- if cpuacct_stat != "" {
- b, err := OpenAndReadAll(cpuacct_stat, stderr)
- if err != nil {
- // Next time around, last_user would
- // be >1 interval old, so stats will
- // be incorrect. Start over instead.
- last_user = -1
-
- // cgroup probably gone -- skip other stats too.
- continue
- }
- var next_user int64
- var next_sys int64
- fmt.Sscanf(string(b), "user %d\nsystem %d", &next_user, &next_sys)