Re: [PATCH RESEND 0/3] perf, amd: Support for Family 16h L2IPerformance Counters

From: Stephane Eranian
Date: Wed Apr 10 2013 - 07:38:26 EST

On Wed, Apr 10, 2013 at 11:41 AM, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> On Tue, 2013-04-09 at 10:23 -0500, Jacob Shin wrote:
> > Upcoming AMD Family 16h Processors provide 4 new performance counters
> > to count L2 related events. Similar to northbridge counters, these new
> > counters are shared across multiple CPUs that share the same L2 cache.
> > This patchset adds support for these new counters and enforces sharing
> > by leveraging the existing sharing logic used for the northbridge
> > counters.
> If they're separate counters -- not shared with the regular cpu
> counters like the 10h NB counters are, then they should have their own
> PMU driver.
> Similar to the 15h NB counters; which are a separate set of counters
> and no longer overlay the normal counters.
Well, that's how this was suggested but that's not how it's
implemented currently
and committed if I recall.
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