59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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//+build windows
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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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handle, err := syscall.GetCurrentProcess()
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if err != nil {
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l.Warnln("Cannot track CPU usage:", err)
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return
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}
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var ctime, etime, ktime, utime syscall.Filetime
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err = syscall.GetProcessTimes(handle, &ctime, &etime, &ktime, &utime)
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if err != nil {
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l.Warnln("Cannot track CPU usage:", err)
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return
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}
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prevTime := ctime.Nanoseconds()
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prevUsage := ktime.Nanoseconds() + utime.Nanoseconds() // Always overflows
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for range time.NewTicker(time.Second).C {
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err := syscall.GetProcessTimes(handle, &ctime, &etime, &ktime, &utime)
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if err != nil {
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continue
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}
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curTime := time.Now().UnixNano()
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timeDiff := curTime - prevTime
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// This is sometimes 0, no clue why.
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if timeDiff == 0 {
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continue
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}
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curUsage := ktime.Nanoseconds() + utime.Nanoseconds()
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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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