mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-19 19:13:25 +02:00
164 lines
4.1 KiB
Go
164 lines
4.1 KiB
Go
// Copyright 2013 Beego Authors
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// Copyright 2014 The Macaron Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package toolbox
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"os"
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"path"
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"runtime"
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"runtime/debug"
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"runtime/pprof"
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"time"
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"github.com/Unknwon/com"
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"gopkg.in/macaron.v1"
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)
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var (
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profilePath string
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pid int
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startTime = time.Now()
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inCPUProfile bool
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)
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// StartCPUProfile starts CPU profile monitor.
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func StartCPUProfile() error {
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if inCPUProfile {
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return errors.New("CPU profile has alreday been started!")
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}
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inCPUProfile = true
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os.MkdirAll(profilePath, os.ModePerm)
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f, err := os.Create(path.Join(profilePath, "cpu-"+com.ToStr(pid)+".pprof"))
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if err != nil {
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panic("fail to record CPU profile: " + err.Error())
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}
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pprof.StartCPUProfile(f)
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return nil
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}
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// StopCPUProfile stops CPU profile monitor.
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func StopCPUProfile() error {
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if !inCPUProfile {
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return errors.New("CPU profile hasn't been started!")
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}
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pprof.StopCPUProfile()
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inCPUProfile = false
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return nil
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}
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func init() {
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pid = os.Getpid()
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}
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// DumpMemProf dumps memory profile in pprof.
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func DumpMemProf(w io.Writer) {
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pprof.WriteHeapProfile(w)
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}
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func dumpMemProf() {
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os.MkdirAll(profilePath, os.ModePerm)
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f, err := os.Create(path.Join(profilePath, "mem-"+com.ToStr(pid)+".memprof"))
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if err != nil {
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panic("fail to record memory profile: " + err.Error())
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}
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runtime.GC()
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DumpMemProf(f)
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f.Close()
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}
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func avg(items []time.Duration) time.Duration {
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var sum time.Duration
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for _, item := range items {
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sum += item
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}
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return time.Duration(int64(sum) / int64(len(items)))
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}
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func dumpGC(memStats *runtime.MemStats, gcstats *debug.GCStats, w io.Writer) {
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if gcstats.NumGC > 0 {
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lastPause := gcstats.Pause[0]
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elapsed := time.Now().Sub(startTime)
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overhead := float64(gcstats.PauseTotal) / float64(elapsed) * 100
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allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
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fmt.Fprintf(w, "NumGC:%d Pause:%s Pause(Avg):%s Overhead:%3.2f%% Alloc:%s Sys:%s Alloc(Rate):%s/s Histogram:%s %s %s \n",
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gcstats.NumGC,
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com.ToStr(lastPause),
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com.ToStr(avg(gcstats.Pause)),
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overhead,
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com.HumaneFileSize(memStats.Alloc),
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com.HumaneFileSize(memStats.Sys),
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com.HumaneFileSize(uint64(allocatedRate)),
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com.ToStr(gcstats.PauseQuantiles[94]),
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com.ToStr(gcstats.PauseQuantiles[98]),
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com.ToStr(gcstats.PauseQuantiles[99]))
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} else {
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// while GC has disabled
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elapsed := time.Now().Sub(startTime)
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allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
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fmt.Fprintf(w, "Alloc:%s Sys:%s Alloc(Rate):%s/s\n",
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com.HumaneFileSize(memStats.Alloc),
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com.HumaneFileSize(memStats.Sys),
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com.HumaneFileSize(uint64(allocatedRate)))
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}
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}
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// DumpGCSummary dumps GC information to io.Writer
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func DumpGCSummary(w io.Writer) {
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memStats := &runtime.MemStats{}
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runtime.ReadMemStats(memStats)
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gcstats := &debug.GCStats{PauseQuantiles: make([]time.Duration, 100)}
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debug.ReadGCStats(gcstats)
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dumpGC(memStats, gcstats, w)
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}
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func handleProfile(ctx *macaron.Context) string {
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switch ctx.Query("op") {
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case "startcpu":
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if err := StartCPUProfile(); err != nil {
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return err.Error()
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}
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case "stopcpu":
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if err := StopCPUProfile(); err != nil {
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return err.Error()
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}
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case "mem":
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dumpMemProf()
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case "gc":
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var buf bytes.Buffer
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DumpGCSummary(&buf)
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return string(buf.Bytes())
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default:
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return fmt.Sprintf(`<p>Available operations:</p>
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<ol>
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<li><a href="%[1]s?op=startcpu">Start CPU profile</a></li>
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<li><a href="%[1]s?op=stopcpu">Stop CPU profile</a></li>
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<li><a href="%[1]s?op=mem">Dump memory profile</a></li>
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<li><a href="%[1]s?op=gc">Dump GC summary</a></li>
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</ol>`, opt.ProfileURLPrefix)
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}
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ctx.Redirect(opt.ProfileURLPrefix)
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return ""
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}
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