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Use cgo to get systems clock ticks for metrics

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Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
This commit is contained in:
Michael Crosby 2014-04-21 10:26:03 -07:00
parent 26bd4906d6
commit ded58db1eb
4 changed files with 33 additions and 2 deletions
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7
cgroups/fs/cpuacct.go
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@ -14,7 +14,10 @@ import (
"github.com/dotcloud/docker/pkg/system"
)
var cpuCount = float64(runtime.NumCPU())
var (
cpuCount = float64(runtime.NumCPU())
clockTicks = float64(system.GetClockTicks())
)
type cpuacctGroup struct {
}
@ -58,7 +61,7 @@ func (s *cpuacctGroup) Stats(d *data) (map[string]float64, error) {
deltaSystem = lastSystem - startSystem
)
if deltaSystem > 0.0 {
percentage = ((deltaProc / deltaSystem) * 100.0) * cpuCount
percentage = ((deltaProc / deltaSystem) * clockTicks) * cpuCount
}
// NOTE: a percentage over 100% is valid for POSIX because that means the
// processes is using multiple cores