If your program is endless, then you'll need to have a timer that says
"it's been long enough, write the profile now"
On Thu, Nov 14, 2019 at 9:35 AM bln prasad <prasad....@gmail.com> wrote:
> My applications main starts few go routines and runs indefinitely. its
> like pprof.StopCPUProfile() may never get called.
>
> Thanks,
> BLN
>
> On Wednesday, 13 November 2019 23:30:47 UTC+5:30, Ian Lance Taylor wrote:
>>
>> On Wed, Nov 13, 2019 at 9:37 AM bln prasad <pras...@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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