1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
package fs2
import (
"bufio"
"os"
"strconv"
"github.com/opencontainers/runc/libcontainer/cgroups"
"github.com/opencontainers/runc/libcontainer/cgroups/fscommon"
"github.com/opencontainers/runc/libcontainer/configs"
)
func isCpuSet(r *configs.Resources) bool {
return r.CpuWeight != 0 || r.CpuQuota != 0 || r.CpuPeriod != 0
}
func setCpu(dirPath string, r *configs.Resources) error {
if !isCpuSet(r) {
return nil
}
// NOTE: .CpuShares is not used here. Conversion is the caller's responsibility.
if r.CpuWeight != 0 {
if err := cgroups.WriteFile(dirPath, "cpu.weight", strconv.FormatUint(r.CpuWeight, 10)); err != nil {
return err
}
}
if r.CpuQuota != 0 || r.CpuPeriod != 0 {
str := "max"
if r.CpuQuota > 0 {
str = strconv.FormatInt(r.CpuQuota, 10)
}
period := r.CpuPeriod
if period == 0 {
// This default value is documented in
// https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html
period = 100000
}
str += " " + strconv.FormatUint(period, 10)
if err := cgroups.WriteFile(dirPath, "cpu.max", str); err != nil {
return err
}
}
return nil
}
func statCpu(dirPath string, stats *cgroups.Stats) error {
const file = "cpu.stat"
f, err := cgroups.OpenFile(dirPath, file, os.O_RDONLY)
if err != nil {
return err
}
defer f.Close()
sc := bufio.NewScanner(f)
for sc.Scan() {
t, v, err := fscommon.ParseKeyValue(sc.Text())
if err != nil {
return &parseError{Path: dirPath, File: file, Err: err}
}
switch t {
case "usage_usec":
stats.CpuStats.CpuUsage.TotalUsage = v * 1000
case "user_usec":
stats.CpuStats.CpuUsage.UsageInUsermode = v * 1000
case "system_usec":
stats.CpuStats.CpuUsage.UsageInKernelmode = v * 1000
case "nr_periods":
stats.CpuStats.ThrottlingData.Periods = v
case "nr_throttled":
stats.CpuStats.ThrottlingData.ThrottledPeriods = v
case "throttled_usec":
stats.CpuStats.ThrottlingData.ThrottledTime = v * 1000
}
}
if err := sc.Err(); err != nil {
return &parseError{Path: dirPath, File: file, Err: err}
}
return nil
}
|
