Re: [PATCH] perf_events: add sampling period randomization support

[Peter Zijlstra]

On Tue, 2010-03-02 at 11:53 +0100, Robert Richter wrote:
> 
> Only adding the random value will lead to longer sample periods on
> average. To compensate this you could calculate something like:
> 
>          event->hw.sample_period = event->attr.sample_period + (new_seed & mask) - (mask >> 1);

Or cheat and do something like:

  sample_period ^= (new_seed & mask);

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