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Add info about contention profiling to profiling.md #4590

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Feb 20, 2015
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Add info about contention profiling to profiling.md #4590

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Add info about contention profiling to profiling.md
gmarek Feb 19, 2015
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gmarek Feb 20, 2015
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6 changes: 5 additions & 1 deletion docs/devel/profiling.md
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Expand Up @@ -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
```
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
```
to get 30 sec. CPU profile.

## Contention profiling

To enable contetion profiling you need to add line ```rt.SetBlockProfileRate(1)``` in addition to ```m.mux.HandleFunc(...)``` added before (```rt``` stands for ```runtime``` in ```master.go```). This enables 'debug/pprof/block' subpage, which can be used as an input to ```go tool pprof```.