linux-kernel - Re: [tip:perf/x86] perf/x86/intel: Add Intel Cache QoS Monitoring support

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Date:	Thu, 26 Feb 2015 18:47:00 +0000
From:	Matt Fleming <matt.fleming@...el.com>
To:	<mingo@...nel.org>, <jolsa@...hat.com>,
	<torvalds@...ux-foundation.org>, <peterz@...radead.org>,
	<linux-kernel@...r.kernel.org>, <acme@...nel.org>,
	<acme@...hat.com>, <hpa@...or.com>, <kanaka.d.juvva@...el.com>,
	<vikas.shivappa@...ux.intel.com>, <tglx@...utronix.de>
CC:	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:perf/x86] perf/x86/intel: Add Intel Cache QoS Monitoring
 support

On Wed, 2015-02-25 at 20:15 -0800, tip-bot for Matt Fleming wrote:
> Commit-ID:  4afbb24ce5e723c8a093a6674a3c33062175078a
> Gitweb:     http://git.kernel.org/tip/4afbb24ce5e723c8a093a6674a3c33062175078a
> Author:     Matt Fleming <matt.fleming@...el.com>
> AuthorDate: Fri, 23 Jan 2015 18:45:44 +0000
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Wed, 25 Feb 2015 13:53:32 +0100
> 
> perf/x86/intel: Add Intel Cache QoS Monitoring support
> 
> Future Intel Xeon processors support a Cache QoS Monitoring feature that
> allows tracking of the LLC occupancy for a task or task group, i.e. the
> amount of data in pulled into the LLC for the task (group).
> 
> Currently the PMU only supports per-cpu events. We create an event for
> each cpu and read out all the LLC occupancy values.
> 
> Because this results in duplicate values being written out to userspace,
> we also export a .per-pkg event file so that the perf tools only
> accumulate values for one cpu per package.
> 
> Signed-off-by: Matt Fleming <matt.fleming@...el.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: H. Peter Anvin <hpa@...or.com>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: Kanaka Juvva <kanaka.d.juvva@...el.com>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: Vikas Shivappa <vikas.shivappa@...ux.intel.com>
> Link: http://lkml.kernel.org/r/1422038748-21397-6-git-send-email-matt@codeblueprint.co.uk
> Signed-off-by: Ingo Molnar <mingo@...nel.org>
> ---
>  arch/x86/kernel/cpu/perf_event_intel_cqm.c | 530 +++++++++++++++++++++++++++++
>  include/linux/perf_event.h                 |   7 +
>  2 files changed, 537 insertions(+)

Weird. I just noticed that the Makefile hunk got dropped. Was that
intentional?

diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 80091ae54c2b..6c1ca139f736 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -39,7 +39,7 @@ obj-$(CONFIG_CPU_SUP_AMD)             += perf_event_amd_iommu.o
 endif
 obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_p6.o perf_event_knc.o perf_event_p4.o
 obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_lbr.o perf_event_intel_ds.o perf_event_intel.o
-obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_rapl.o
+obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_rapl.o perf_event_intel_cqm.o
 
 obj-$(CONFIG_PERF_EVENTS_INTEL_UNCORE) += perf_event_intel_uncore.o \
                                           perf_event_intel_uncore_snb.o \

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