47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. If not, see <http://www.gnu.org/licenses/>.
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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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