Re: [RFC][PATCH 0/6] perf: x86 RDPMC and RDTSC support

[Arun Sharma]

On 12/6/11 1:42 AM, Peter Zijlstra wrote:
> On Mon, 2011-12-05 at 15:17 -0800, Arun Sharma wrote:
> > I suspect that some optimizations are possible in perf_rotate_context
> > that don't involve enabling/disabling the PMU via an IPI for simple
> > cases that involve one or two hardware events (eg: fixed counters).
>
> I've got a patch queued that does exactly that.

Verified that this fixes the lat_ctx regression. Thanks.

 -Arun

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