Use pprof remote view httpserver run stack for Golang program, CPU time-consuming and other information

This is a creation in Article, where the information may have evolved or changed.

Pprof is a god horse thing?

Pprof-manual page for Pprof (part of Gperftools)

is part of the Gperftools tool.

What is Gperftools again?

These tools is for use by developers so, they can create more robust applications. Especially of use to those developing multi-threaded applications in C + + with templates. Includes Tcmalloc, Heap-checker, Heap-profiler and Cpu-profiler.

A profiling tool that can view stacks, CPU information, and so on.

How to use it in Golang? Let's take a look below.

1. In a httpserver, only one line of code is required

Package Mainimport ("Flag" "Log" "Net/http" _ "net/http/pprof" "Sync" "Time") Func main () {flag. Parse ()//here implements a remote fetch PPROF data Interface go func () {log. Println (http. Listenandserve ("localhost:6060", Nil)} ()var wg sync. Waitgroupwg.add (Ten) for I: = 0; I < 10; i++ {go work (&WG)}WG. Wait ()//wait to see the global Run queue Deplete.time.Sleep (3 * time. Second)}func work (WG *sync. Waitgroup) {time. Sleep (time. Second) var counter intfor I: = 0; i < 1e10; i++ {time. Sleep (Time.millisecond *) COUNTER++}WG. Done ()}

2. Compile and run the program

Go Build Trace_example.go

./trace_example

3. Access via browser

http://localhost:6060/debug/pprof/

Ability to view the overview of a program

4. You can also use the terminal command to view

Then use the Pprof tool-to-look at the heap profile:

Go Tool pprof Http://localhost:6060/debug/pprof/heap

Or to the look in a 30-second CPU profile:

Go Tool pprof Http://localhost:6060/debug/pprof/profile

Or to look at the Goroutine blocking profile:

Go Tool pprof Http://localhost:6060/debug/pprof/block

Qpzhang@qpzhangdemac-mini:~/gocode $go tool Pprof Http://localhost:6060/debug/pprof/profileRead http://localhost : 6060/debug/pprof/symbolgathering CPU profile from http://localhost:6060/debug/pprof/profile?seconds=30 for 30 Seconds to/var/folders/2l/195zcc1n0sn2wjfjwf9hl9d80000gn/t/mmbnpdkv0dbe Patient ...  Wrote profile To/var/folders/2l/195zcc1n0sn2wjfjwf9hl9d80000gn/t/mmbnpdkv0dwelcome to pprof! For help, type ' help '.        (pprof) Top10total:9 samples 6 66.7% 66.7% 6 66.7% runtime.mach_semaphore_wait 1 11.1% 77.8%        1 11.1% runtime.kevent 1 11.1% 88.9% 1 11.1% runtime.mach_semaphore_signal 1 11.1% 100% 1 11.1% runtime.mach_semaphore_timedwait 0 0.0% 100.0% 7 77.8% System 0 0% 100% 1 1    1.1% notetsleep 0 0.0% 100.0% 1 11.1% ready 0 0.0% 100.0% 2 22.2% runtime.gosched0 0 0.0% 100.0% 1 11.1% runtime.mach_semrelease 0 0% 100% 1 11.1% RUNTIME.NOTETSLEEPG (pprof) webtotal:9 samplesloading Web page file:////var/folders/2l/ 195zcc1n0sn2wjfjwf9hl9d80000gn/t/slfuzhzbdb.0.svg

Web commands generate cool SVG images that are opened in a browser.

In addition to remote pull, you can write your own code to write this data to a file (implementing several routes in the net/http/pprof, turning tracing information on or off).
For specific reference: Http://blog.golang.org/profiling-go-programs
Https://github.com/hyper-carrot/go_command_tutorial/blob/master/0.12.md

Period: Web commands rely on an SVG build package, which you can download via http://www.graphviz.org/Download_macos.php under Mac.

-------------------------------------

2016.11.14 Updated

Agent based on Uninx domain socket, can not take the HTTP

Https://github.com/google/gops