Re: [perfmon2] Using performance monitoring from within a program

[stephane e. <er...@go...>]

On Sat, Dec 19, 2009 at 3:06 AM, Vlad Slavici <vs...@cc...> wrote:
> Hi again,
>
> Is it possible to start performance monitoring from within C code and then turn it off from the code as well? I would like to be able to do something like:
>
For that look at the self.c example, i.e, self monitoring for counting.

> int main(){
> ...
> code
> ...
>
> start performance monitoring on LOCKED_OPS:CYCLES_WAITING event
>
> ...
> code
> ...
>
> turn off performance monitoring on LOCKED_OPS:CYCLES_WAITING event
> display perf. monitoring results
>
> ...
> code
> ...
>
> }
>
> I would use this to get separate results for various parts of my code, without having to separate my code into different files and run 'task' on them independently. I assume I have to link the executable with -lpfm4, but besides that what libpfm4 library functions or utilities could I use from withing my C program's main() function to start monitoring on the current multithreaded process at a certain location in the code, and then turn off monitoring later, display the results and run the rest of the main function without monitoring?
>
> Thank you,
>
> Vlad
>
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