Messages in this thread | | | Subject | Re: [PATCH] perf_events: add sampling period randomization support | From | Peter Zijlstra <> | Date | Tue, 02 Mar 2010 12:41:18 +0100 |
| |
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);
| |