Re: [PATCH RESEND 0/3] perf, amd: Support for Family 16h L2I Performance Counters

Peter Zijlstra
2013-04-10T09:41:33Z

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.