Re: perf trace

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On 04/18/11 11:46, Kumar Ranjit-B04060 wrote:
> David
> 
> 
>  > meaning periodic samples of the counter? perf-record does not generate periodic reads of H/W counters.
> 
> Just curious, How does then the profiling works? Perf report shows % no of sample point corresponding a particular event. So it must be sampling the PC periodically.
> Regards
> Ranjit

With H/W counters the values of the counters are not read when samples
are created.

David
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