36 lines
894 B
Go
36 lines
894 B
Go
// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
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// All rights reserved. Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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//+build !windows,!solaris
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package main
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import (
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"syscall"
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"time"
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)
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func init() {
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go trackCPUUsage()
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}
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func trackCPUUsage() {
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var prevUsage int64
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var prevTime = time.Now().UnixNano()
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var rusage syscall.Rusage
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for _ = range time.NewTicker(time.Second).C {
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syscall.Getrusage(syscall.RUSAGE_SELF, &rusage)
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curTime := time.Now().UnixNano()
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timeDiff := curTime - prevTime
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curUsage := rusage.Utime.Nano() + rusage.Stime.Nano()
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usageDiff := curUsage - prevUsage
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cpuUsageLock.Lock()
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copy(cpuUsagePercent[1:], cpuUsagePercent[0:])
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cpuUsagePercent[0] = 100 * float64(usageDiff) / float64(timeDiff)
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cpuUsageLock.Unlock()
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prevTime = curTime
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prevUsage = curUsage
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}
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}
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