/
hugetlb.go
84 lines (70 loc) · 1.81 KB
/
hugetlb.go
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
package fs
import (
"errors"
"os"
"strconv"
"github.com/opencontainers/runc/libcontainer/cgroups"
"github.com/opencontainers/runc/libcontainer/cgroups/fscommon"
"github.com/opencontainers/runc/libcontainer/configs"
)
type HugetlbGroup struct{}
func (s *HugetlbGroup) Name() string {
return "hugetlb"
}
func (s *HugetlbGroup) Apply(path string, _ *configs.Resources, pid int) error {
return apply(path, pid)
}
func (s *HugetlbGroup) Set(path string, r *configs.Resources) error {
const suffix = ".limit_in_bytes"
skipRsvd := false
for _, hugetlb := range r.HugetlbLimit {
prefix := "hugetlb." + hugetlb.Pagesize
val := strconv.FormatUint(hugetlb.Limit, 10)
if err := cgroups.WriteFile(path, prefix+suffix, val); err != nil {
return err
}
if skipRsvd {
continue
}
if err := cgroups.WriteFile(path, prefix+".rsvd"+suffix, val); err != nil {
if errors.Is(err, os.ErrNotExist) {
skipRsvd = true
continue
}
return err
}
}
return nil
}
func (s *HugetlbGroup) GetStats(path string, stats *cgroups.Stats) error {
if !cgroups.PathExists(path) {
return nil
}
rsvd := ".rsvd"
hugetlbStats := cgroups.HugetlbStats{}
for _, pageSize := range cgroups.HugePageSizes() {
again:
prefix := "hugetlb." + pageSize + rsvd
value, err := fscommon.GetCgroupParamUint(path, prefix+".usage_in_bytes")
if err != nil {
if rsvd != "" && errors.Is(err, os.ErrNotExist) {
rsvd = ""
goto again
}
return err
}
hugetlbStats.Usage = value
value, err = fscommon.GetCgroupParamUint(path, prefix+".max_usage_in_bytes")
if err != nil {
return err
}
hugetlbStats.MaxUsage = value
value, err = fscommon.GetCgroupParamUint(path, prefix+".failcnt")
if err != nil {
return err
}
hugetlbStats.Failcnt = value
stats.HugetlbStats[pageSize] = hugetlbStats
}
return nil
}