Re: [RFC PATCH 6/7] perf, x86: large PEBS interrupt threshold

[Peter Zijlstra]

On Wed, May 28, 2014 at 07:05:31PM +0200, Peter Zijlstra wrote:
> If we get the PMI (where denoted) we can actually reconstruct which
> event triggered, by looking at which bit(s) flipped between the recorded
> state and the current state (due to E coming before F)
> 

just a bit flip (xor) isn't enough, we need to find the bit that flipped
off, so the condition gets slightly more complicated.

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