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perf: Intel uncore pmu counting support

From:  "Yan, Zheng" <>
Subject:  [PATCH V5 0/13] perf: Intel uncore pmu counting support
Date:  Tue, 12 Jun 2012 13:37:35 +0800
Message-ID:  <>
Archive-link:  Article

Hi, all

Here is the V5 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 sysfs directory:

Each file in the events directory defines an event. The content is
a string such as:

You can use 'perf stat' to access to the uncore pmu. For example:
  perf stat -a -C 0 -e 'Uncore_iMC_0/CAS_COUNT_RD/' sleep 1
  perf stat -a -C 0 -e 'Uncore_iMC_0/event=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 

Changes since v3:
 - Use per cpu pointer to track uncore box
 - Rework the cpu hotplug code because topology_physical_package_id()
   return wrong result when the cpu is offline
 - Rework the event alias code, event terms are stored in the alias
   structure instead events string

Changes since v4:
 - Include Jiri's uncore related changes patch set
 - Add pmu/event=alias/ syntax support

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