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kubelet stats: use UsageNanoCores if available

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Signed-off-by: Peter Hunt <pehunt@redhat.com>
This commit is contained in:
Peter Hunt 2021-06-23 15:03:17 -04:00
parent ffdb4b9c4a
commit 85e8a4bf73
1 changed files with 19 additions and 5 deletions
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24
pkg/kubelet/stats/cri_stats_provider.go
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@ -678,12 +678,18 @@ func (p *criStatsProvider) makeContainerCPUAndMemoryStats(
return result
}
// getContainerUsageNanoCores gets the cached usageNanoCores.
// getContainerUsageNanoCores first attempts to get the usage nano cores from the stats reported
// by the CRI. If it is unable to, it gets the information from the cache instead.
func (p *criStatsProvider) getContainerUsageNanoCores(stats *runtimeapi.ContainerStats) *uint64 {
if stats == nil || stats.Attributes == nil {
return nil
}
// Bypass the cache if the CRI implementation specified the UsageNanoCores.
if stats.Cpu.UsageNanoCores != nil {
return &stats.Cpu.UsageNanoCores.Value
}
p.mutex.RLock()
defer p.mutex.RUnlock()
@ -696,11 +702,19 @@ func (p *criStatsProvider) getContainerUsageNanoCores(stats *runtimeapi.Containe
return &latestUsage
}
// getContainerUsageNanoCores computes usageNanoCores based on the given and
// the cached usageCoreNanoSeconds, updates the cache with the computed
// usageNanoCores, and returns the usageNanoCores.
// getAndUpdateContainerUsageNanoCores first attempts to get the usage nano cores from the stats reported
// by the CRI. If it is unable to, it computes usageNanoCores based on the given and the cached usageCoreNanoSeconds,
// updates the cache with the computed usageNanoCores, and returns the usageNanoCores.
func (p *criStatsProvider) getAndUpdateContainerUsageNanoCores(stats *runtimeapi.ContainerStats) *uint64 {
if stats == nil || stats.Attributes == nil || stats.Cpu == nil || stats.Cpu.UsageCoreNanoSeconds == nil {
if stats == nil || stats.Attributes == nil || stats.Cpu == nil {
return nil
}
// Bypass the cache if the CRI implementation specified the UsageNanoCores.
if stats.Cpu.UsageNanoCores != nil {
return &stats.Cpu.UsageNanoCores.Value
}
// If there is no UsageNanoCores, nor UsageCoreNanoSeconds, there is no information to use
if stats.Cpu.UsageCoreNanoSeconds == nil {
return nil
}
id := stats.Attributes.Id