go timeprof 源码
golang timeprof 代码
文件路径：/src/runtime/testdata/testprog/timeprof.go
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"os"
"runtime/pprof"
"time"
)
func init() {
register("TimeProf", TimeProf)
}
func TimeProf() {
f, err := os.CreateTemp("", "timeprof")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(2)
}
if err := pprof.StartCPUProfile(f); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(2)
}
t0 := time.Now()
// We should get a profiling signal 100 times a second,
// so running for 1/10 second should be sufficient.
for time.Since(t0) < time.Second/10 {
}
pprof.StopCPUProfile()
name := f.Name()
if err := f.Close(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(2)
}
fmt.Println(name)
}
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