The go tool pprof command is interactive, so I thought it is enough type 'png' to get the image after the benchmark is run
I tested to start go tool pprof now as well during and after the benchmark -> nothing changes Am Montag, 27. November 2017 04:37:48 UTC+1 schrieb Karan Chaudhary: > > From the top of my head, shouldn't the benchmark be done when traffic is > being sent to the server and not before it is sent? > > On Sunday, 26 November 2017 00:11:40 UTC+5:30, basti skalendudler wrote: >> >> Hey guiys, I posted a StackOF question two days ago, but so far nobody >> was able to help me! >> >> I am trying to profile my web server I wrote, but my pprof does not >> contain any data about the handler func. >> I am using the httprouter package >> <https://github.com/julienschmidt/httprouter> by julienschmidt, and want >> to simply benchmark one of my handlers and see the pprof profile for that. >> For the benchmarking, I am using go-wrk >> <https://github.com/tsliwowicz/go-wrk> >> >> I set up my web server and pprof like this: >> >> >> // Configure the server >> server := &http.Server{ >> Addr: ":4000", >> Handler: router, >> } >> >> >> go func() { >> log.Println(http.ListenAndServe(":6060", nil)) >> }() >> >> >> // Start the server >> err = server.ListenAndServe() >> if err != nil { >> panic(err) >> } >> >> >> The router is initialized like this: >> >> >> // Create the httprouter >> router := httprouter.New() >> // Register all handlers >> router.GET("/entities/:type/map", h.UseHandler(&h. >> ApiGetEntitiesMapRequest{}, p)) >> >> >> And my handler looks like this: >> >> >> func (req ApiGetEntitiesMapRequest) Handle(r *http.Request, hrp >> httprouter.Params, p Params) (interface{}, error) { >> test := make([]string, 0) >> for i := 0; i < 1000; i++ { >> test = append(test, "1") >> test = append(test, "2") >> // Ensure pprof has some time to collect its data >> time.Sleep(10) >> } >> return test, nil >> } >> >> This handler is just a test, where I dynamically append a lot of elements >> to a slice. The reason for that is, I wanted to test whether these dynamic >> allocations are represented in the heap profile of pprof. >> >> Now, what I did was: >> >> - Start my server >> - execute **go tool pprof http://localhost:6060/debug/pprof/heap** in >> my terminal >> - then benchmark my handler by executing **go-wrk -no-c -d 5 >> http://localhost:4000/entities/object/map** >> >> The request works and my benchmark also reports everything correctly. >> However, when I type **png** in the pprof terminal, I get this graph: >> >> >> <https://lh3.googleusercontent.com/-H5BlDsvkGc8/WhkpNlbAgBI/AAAAAAAABMQ/MagwiySh4F8G5NvT4V4_uTAnHexw0VqBACLcBGAs/s1600/profile001.png> >> >> >> The graph does not contain any information about my handler and the >> costly heap allocations I did in my handler. What am I doing wrong? >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
