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.ga29...@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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