linux-kernel - [PATCH V6 0/13] perf: Intel uncore pmu counting support

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Message-Id: <1339741902-8449-1-git-send-email-zheng.z.yan@intel.com>
Date:	Fri, 15 Jun 2012 14:31:29 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	a.p.zijlstra@...llo.nl, mingo@...e.hu, jolsa@...hat.com,
	eranian@...gle.com, andi@...stfloor.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH V6 0/13] perf: Intel uncore pmu counting support

Hi, all

Here is the V6 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:
  /sys/bus/event_source/devices/${uncore_dev}/events/

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

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

Changes since v5:
 - All lower case letters for uncore pmu name
 - Make event alias case insensitive

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