On Fri, Sep 6, 2019 at 8:36 PM Vincent Blanchon
<blanchon.vinc...@gmail.com> wrote:
> The documentation of the profiling 
> (https://blog.golang.org/profiling-go-programs) explains that: "Go program 
> stops about 100 times per second".
> However, in the code, I could see that the collector has a sleep of 100ms 
> https://github.com/golang/go/blob/master/src/runtime/pprof/pprof.go#L779. 
> Therefore, it collects data only 10 times per second?
> Also, it does not stop the program since it is a separated goroutine 
> https://github.com/golang/go/blob/master/src/runtime/pprof/pprof.go#L764.
> Did I miss something here?

The actual profile data is collected by the code in runtime/cpuprof.go
and runtime/profBuf.go.  That data is generated 100 times per second.
The code you are looking at in the runtime/pprof package is the code
that is collecting that data, which is generated at interrupt time,
and converting it into a format that can be reported to the user or
the pprof program.


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