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Re: [tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping events into a cache_group

From Matt Fleming <matt@codeblueprint.co.uk>
Newsgroups linux.kernel
Subject Re: [tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping events into a cache_group
Date 2016-03-21 16:00 +0100
Message-ID <rf9tf-7al-1@gated-at.bofh.it> (permalink)
References <rbils-5Ng-23@gated-at.bofh.it> <rf4MW-3JE-27@gated-at.bofh.it>
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On Mon, 21 Mar, at 02:51:29AM, tip-bot for Vikas Shivappa wrote:
> Commit-ID:  a223c1c7ab4cc64537dc4b911f760d851683768a
> Gitweb:     http://git.kernel.org/tip/a223c1c7ab4cc64537dc4b911f760d851683768a
> Author:     Vikas Shivappa <vikas.shivappa@linux.intel.com>
> AuthorDate: Thu, 10 Mar 2016 15:32:07 -0800
> Committer:  Ingo Molnar <mingo@kernel.org>
> CommitDate: Mon, 21 Mar 2016 09:08:18 +0100
> 
> perf/x86/cqm: Fix CQM handling of grouping events into a cache_group
> 
> Currently CQM (cache quality of service monitoring) is grouping all
> events belonging to same PID to use one RMID. However its not counting
> all of these different events. Hence we end up with a count of zero
> for all events other than the group leader.
 
The reason that was done originally was because reporting for all events
in a group led to duplicate values, since you'd be emitting the same
RMID value multiple times.

Is this no longer a problem?

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[tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping events  into a cache_group tip-bot for Vikas Shivappa <tipbot@zytor.com> - 2016-03-21 11:00 +0100
  Re: [tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping  events into a cache_group Matt Fleming <matt@codeblueprint.co.uk> - 2016-03-21 16:00 +0100
    Re: [tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping  events into a cache_group Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2016-03-21 19:20 +0100
      Re: [tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping  events into a cache_group Matt Fleming <matt@codeblueprint.co.uk> - 2016-03-23 21:20 +0100
        Re: [tip:perf/urgent] perf/x86/cqm: Fix CQM handling of grouping  events into a cache_group Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2016-03-24 00:00 +0100

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