Messages in this thread | | | From | Huang Rui <> | Subject | [PATCH 0/4] perf/x86/power: Introduce AMD accumlated power reporting mechanism | Date | Thu, 7 Jan 2016 10:26:10 +0800 |
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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
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