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

[Huang Rui <ray.huang@amd.com>]

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