On Wed, Nov 13, 2019 at 9:37 AM bln prasad <prasad....@gmail.com> wrote:
>
> I'm running go application as systemd service. I've enabled cpu profile using
> pprof as specified in documents. When service ran, it's creating file but no
> samples are getting written to file.
> Does it required any special build arguments?
>
> f, err := os.Create("/tmp/cpu.prof")
> if err != nil {
> log.Fatal("could not create CPU profile: ", err)
> }
> defer f.Close()
>
> if err := pprof.StartCPUProfile(f); err != nil {
> log.Fatal("could not start CPU profile: ", err)
> }
> defer pprof.StopCPUProfile()
It's impossible to tell without seeing more of your program. The
program has to actually do something between the calls to
StartCPUProfile and StopCPUProfile. In particular, samples are taken
by default every 10 milliseconds, so if your program runs for a much
shorter amount of time then it would be normal to not see any samples.
Ian
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