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Source file src/cmd/trace/doc.go

Documentation: cmd/trace

  // Copyright 2017 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.
  
  /*
  Trace is a tool for viewing trace files.
  
  Trace files can be generated with:
  	- runtime/trace.Start
  	- net/http/pprof package
  	- go test -trace
  
  Example usage:
  Generate a trace file with 'go test':
  	go test -trace trace.out pkg
  View the trace in a web browser:
  	go tool trace trace.out
  Generate a pprof-like profile from the trace:
  	go tool trace -pprof=TYPE trace.out > TYPE.pprof
  
  Supported profile types are:
  	- net: network blocking profile
  	- sync: synchronization blocking profile
  	- syscall: syscall blocking profile
  	- sched: scheduler latency profile
  
  Then, you can use the pprof tool to analyze the profile:
  	go tool pprof TYPE.pprof
  
  Note that while the various profiles available when launching
  'go tool trace' work on every browser, the trace viewer itself
  (the 'view trace' page) comes from the Chrome/Chromium project
  and is only actively tested on that browser.
  */
  package main
  

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