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Add info about contention profiling to profiling.md

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gmarek 2015-02-19 14:50:54 +01:00
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docs/devel/profiling.md
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@ -23,8 +23,12 @@ Even when running profiler I found not really straightforward to use 'go tool pp
``` ```
ssh kubernetes_master -L<local_port>:localhost:8080 ssh kubernetes_master -L<local_port>:localhost:8080
``` ```
or analogous one for you Cloud provider. Afterwards you can e.g. run or analogous one for you Cloud provider. Afterwards you can e.g. run
``` ```
go tool pprof http://localhost:<local_port>/debug/pprof/profile go tool pprof http://localhost:<local_port>/debug/pprof/profile
``` ```
to get 30 sec. CPU profile. to get 30 sec. CPU profile.
## Contention profiling
To enable contetion profiling you need to add line ```rt.SetBlockProfileRate(1)``` to ones added before (```rt``` stands for ```runtime``` in ```master.go```). This enables 'debug/pprof/block' subpage, which can be used as an input go to ```go tool pprof```.