linux-kernel - [PATCH 0/4] perf/x86/power: Introduce AMD accumlated power reporting mechanism

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Date:	Thu, 7 Jan 2016 10:26:10 +0800
From:	Huang Rui <ray.huang@....com>
To:	Borislav Petkov <bp@...e.de>,
	Peter Zijlstra <peterz@...radead.org>,
	"Ingo Molnar" <mingo@...nel.org>,
	Andy Lutomirski <luto@...capital.net>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	Robert Richter <rric@...nel.org>,
	Jacob Shin <jacob.w.shin@...il.com>,
	John Stultz <john.stultz@...aro.org>,
	Frédéric Weisbecker <fweisbec@...il.com>
CC:	<linux-kernel@...r.kernel.org>, <spg_linux_kernel@....com>,
	<x86@...nel.org>, Guenter Roeck <linux@...ck-us.net>,
	Andreas Herrmann <herrmann.der.user@...glemail.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>,
	Borislav Petkov <bp@...en8.de>,
	"Fengguang Wu" <fengguang.wu@...el.com>,
	Aaron Lu <aaron.lu@...el.com>, Huang Rui <ray.huang@....com>
Subject: [PATCH 0/4] perf/x86/power: Introduce AMD accumlated power reporting mechanism

Hi,

This series of patches introduces the perf implementation of
accumulated power reporting algorithm. It will calculate the average
power consumption for the processor. The CPU feature flag is
CPUID.8000_0007H:EDX[12].

Simple example:

root@...zp:/home/ray/tip# ./tools/perf/perf stat -a -e 'power/power-pkg/' make -j4
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CHK     include/generated/timeconst.h
  CHK     include/generated/bounds.h
  CHK     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  SKIPPED include/generated/compile.h
  Building modules, stage 2.
Kernel: arch/x86/boot/bzImage is ready  (#40)
  MODPOST 4225 modules

 Performance counter stats for 'system wide':

            183.44 mWatts power/power-pkg/

     341.837270111 seconds time elapsed

root@...zp:/home/ray/tip# ./tools/perf/perf stat -a -e 'power/power-pkg/' sleep 10

 Performance counter stats for 'system wide':

              0.18 mWatts power/power-pkg/

      10.012551815 seconds time elapsed

Reference:
http://lkml.kernel.org/r/20150831160622.GA29830@nazgul.tnic

Thanks,
Rui

Huang Rui (4):
  x86/amd: move nodes_per_socket into bsp_init_amd
  x86/amd: add accessor for number of cores per compute unit
  x86/cpufeature: add AMD Accumulated Power Mechanism feature flag
  perf/x86/amd/power: Add AMD accumulated power reporting mechanism

 arch/x86/include/asm/cpufeature.h          |   2 +-
 arch/x86/include/asm/processor.h           |   1 +
 arch/x86/kernel/cpu/Makefile               |   1 +
 arch/x86/kernel/cpu/amd.c                  |  31 +-
 arch/x86/kernel/cpu/perf_event_amd_power.c | 531 +++++++++++++++++++++++++++++
 5 files changed, 561 insertions(+), 5 deletions(-)
 create mode 100644 arch/x86/kernel/cpu/perf_event_amd_power.c

-- 
1.9.1

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