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perf: Intel uncore pmu counting support

From:  "Yan, Zheng" <zheng.z.yan@intel.com>
To:  a.p.zijlstra@chello.nl, mingo@elte.hu, andi@firstfloor.org, eranian@google.com, jolsa@redhat.com, ming.m.lin@intel.com
Subject:  [PATCH V3 0/9] perf: Intel uncore pmu counting support
Date:  Wed, 2 May 2012 10:07:11 +0800
Message-ID:  <1335924440-11242-1-git-send-email-zheng.z.yan@intel.com>
Cc:  linux-kernel@vger.kernel.org
Archive-link:  Article

Hi, all

Here is the V3 patches to add uncore counting support for Nehalem,
Sandy Bridge and Sandy Bridge-EP, applied on top of current tip.
The code is based on Lin Ming's old patches.

For Nehalem and Sandy Bridge-EP, A few general events are exported
under directory:
  /sys/bus/event_source/devices/${uncore_dev}/events/

Each file in the events directory defines an event. The content is
like:
  config=1,config1=2

You can use 'perf stat' to access to the uncore pmu. For example:
  perf stat -a -C 0 -e 'uncore_imc0/CAS_COUNT_RD/' sleep 1

Any comment is appreciated.
Thank you
---
Changes since v1:
 - Modify perf tool to parse events from sysfs
 - A few minor code cleanup

Changes since v2:
 - Place all events for a particular socket onto a single cpu
 - Make the events parser in perf tool reentrantable
 - A few code cleanup

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