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Expose memory.use_hierarchy in MemoryStats 

Signed-off-by: Derek Carr <decarr@redhat.com>
This commit is contained in:
Derek Carr 2017-03-20 16:16:00 -04:00
parent 653207bc29
commit 4d6225aec2
4 changed files with 22 additions and 5 deletions
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8
libcontainer/cgroups/fs/memory.go
View File

@ -243,6 +243,14 @@ func (s *MemoryGroup) GetStats(path string, stats *cgroups.Stats) error {
}
stats.MemoryStats.KernelTCPUsage = kernelTCPUsage
useHierarchy := strings.Join([]string{"memory", "use_hierarchy"}, ".")
value, err := getCgroupParamUint(path, useHierarchy)
if err != nil {
return err
}
if value == 1 {
stats.MemoryStats.UseHierarchy = true
}
return nil
}

12
libcontainer/cgroups/fs/memory_test.go
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@ -12,10 +12,11 @@ import (
const (
memoryStatContents = `cache 512
rss 1024`
memoryUsageContents = "2048\n"
memoryMaxUsageContents = "4096\n"
memoryFailcnt = "100\n"
memoryLimitContents = "8192\n"
memoryUsageContents = "2048\n"
memoryMaxUsageContents = "4096\n"
memoryFailcnt = "100\n"
memoryLimitContents = "8192\n"
memoryUseHierarchyContents = "1\n"
)
func TestMemorySetMemory(t *testing.T) {
@ -273,6 +274,7 @@ func TestMemoryStats(t *testing.T) {
"memory.kmem.max_usage_in_bytes": memoryMaxUsageContents,
"memory.kmem.failcnt": memoryFailcnt,
"memory.kmem.limit_in_bytes": memoryLimitContents,
"memory.use_hierarchy": memoryUseHierarchyContents,
})
memory := &MemoryGroup{}
@ -281,7 +283,7 @@ func TestMemoryStats(t *testing.T) {
if err != nil {
t.Fatal(err)
}
expectedStats := cgroups.MemoryStats{Cache: 512, Usage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, SwapUsage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, KernelUsage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, Stats: map[string]uint64{"cache": 512, "rss": 1024}}
expectedStats := cgroups.MemoryStats{Cache: 512, Usage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, SwapUsage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, KernelUsage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, Stats: map[string]uint64{"cache": 512, "rss": 1024}, UseHierarchy: true}
expectMemoryStatEquals(t, expectedStats, actualStats.MemoryStats)
}

5
libcontainer/cgroups/fs/stats_util_test.go
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@ -84,6 +84,11 @@ func expectMemoryStatEquals(t *testing.T, expected, actual cgroups.MemoryStats)
expectMemoryDataEquals(t, expected.SwapUsage, actual.SwapUsage)
expectMemoryDataEquals(t, expected.KernelUsage, actual.KernelUsage)
if expected.UseHierarchy != actual.UseHierarchy {
logrus.Printf("Expected memory use hiearchy %v, but found %v\n", expected.UseHierarchy, actual.UseHierarchy)
t.Fail()
}
for key, expValue := range expected.Stats {
actValue, ok := actual.Stats[key]
if !ok {

2
libcontainer/cgroups/stats.go
View File

@ -51,6 +51,8 @@ type MemoryStats struct {
KernelUsage MemoryData `json:"kernel_usage,omitempty"`
// usage of kernel TCP memory
KernelTCPUsage MemoryData `json:"kernel_tcp_usage,omitempty"`
// if true, memory usage is accounted for throughout a hierarchy of cgroups.
UseHierarchy bool `json:"use_hierarchy"`
Stats map[string]uint64 `json:"stats,omitempty"`
}