perf/x86/intel: Add Intel Cache QoS Monitoring support
authorMatt Fleming <matt.fleming@intel.com>
Fri, 23 Jan 2015 18:45:44 +0000 (18:45 +0000)
committerIngo Molnar <mingo@kernel.org>
Wed, 25 Feb 2015 12:53:32 +0000 (13:53 +0100)
commit4afbb24ce5e723c8a093a6674a3c33062175078a
tree0ac9eea7a69bbb6085d5659d42308c005d6df252
parentcbc82b17263877ea5d21e84c58ce03f0292458a1
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@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kanaka Juvva <kanaka.d.juvva@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Link: http://lkml.kernel.org/r/1422038748-21397-6-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/cpu/perf_event_intel_cqm.c [new file with mode: 0644]
include/linux/perf_event.h