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stats: use runtime.NumCPU when percpu counters are not available

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in the cgroup v2 implementation we don't have yet percpu times.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano
2019-07-02 14:14:16 +02:00
parent 7423426f73
commit 856780f552
1 changed files with 6 additions and 1 deletions
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7
libpod/stats.go
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@ -3,6 +3,7 @@
package libpod
import (
"runtime"
"strings"
"syscall"
"time"
@ -105,7 +106,11 @@ func calculateCPUPercent(stats *cgroups.Metrics, previousCPU, previousSystem uin
if systemDelta > 0.0 && cpuDelta > 0.0 {
// gets a ratio of container cpu usage total, multiplies it by the number of cores (4 cores running
// at 100% utilization should be 400% utilization), and multiplies that by 100 to get a percentage
cpuPercent = (cpuDelta / systemDelta) * float64(len(stats.CPU.Usage.PerCPU)) * 100
nCPUS := len(stats.CPU.Usage.PerCPU)
if nCPUS == 0 {
nCPUS = runtime.NumCPU()
}
cpuPercent = (cpuDelta / systemDelta) * float64(nCPUS) * 100
}
return cpuPercent
}