lkml.org 
[lkml]   [2016]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/4] perf/x86/power: Introduce AMD accumlated power reporting mechanism
Date
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@hr-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@hr-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



\
 
 \ /
  Last update: 2016-01-07 04:01    [W:0.051 / U:4.136 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site