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package fs
import (
"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 {
for _, hugetlb := range r.HugetlbLimit {
if err := cgroups.WriteFile(path, "hugetlb."+hugetlb.Pagesize+".limit_in_bytes", strconv.FormatUint(hugetlb.Limit, 10)); err != nil {
return err
}
}
return nil
}
func (s *HugetlbGroup) GetStats(path string, stats *cgroups.Stats) error {
if !cgroups.PathExists(path) {
return nil
}
hugetlbStats := cgroups.HugetlbStats{}
for _, pageSize := range cgroups.HugePageSizes() {
usage := "hugetlb." + pageSize + ".usage_in_bytes"
value, err := fscommon.GetCgroupParamUint(path, usage)
if err != nil {
return err
}
hugetlbStats.Usage = value
maxUsage := "hugetlb." + pageSize + ".max_usage_in_bytes"
value, err = fscommon.GetCgroupParamUint(path, maxUsage)
if err != nil {
return err
}
hugetlbStats.MaxUsage = value
failcnt := "hugetlb." + pageSize + ".failcnt"
value, err = fscommon.GetCgroupParamUint(path, failcnt)
if err != nil {
return err
}
hugetlbStats.Failcnt = value
stats.HugetlbStats[pageSize] = hugetlbStats
}
return nil
}
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