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SubjectRe: [PATCH 1/6] perf, x86: Making hardware events tranlations sysfs available
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On Thu, 2012-06-14 at 22:38 +0200, Jiri Olsa wrote:
> Making hardware events tranlations available throught the sysfs.
> Adding 'events' group attribute under the sysfs x86 PMU record
> with attribute/file for each hardware event:
>
> # ls /sys/devices/cpu/events/
> branch_instructions
> branch_misses
> bus_cycles
> cache_misses
> cache_references
> cycles
> instructions
> ref_cycles
> stalled_cycles_backend
> stalled_cycles_frontend
>
> The file - ID mappings is:
>
> file hw id
> ----------------------------------------------------------------
> cycles PERF_COUNT_HW_CPU_CYCLES
> instructions PERF_COUNT_HW_INSTRUCTIONS
> cache_references PERF_COUNT_HW_CACHE_REFERENCES
> cache_misses PERF_COUNT_HW_CACHE_MISSES
> branch_instructions PERF_COUNT_HW_BRANCH_INSTRUCTIONS
> branch_misses PERF_COUNT_HW_BRANCH_MISSES
> bus_cycles PERF_COUNT_HW_BUS_CYCLES
> stalled_cycles_frontend PERF_COUNT_HW_STALLED_CYCLES_FRONTEND
> stalled_cycles_backend PERF_COUNT_HW_STALLED_CYCLES_BACKEND
> ref_cycles PERF_COUNT_HW_REF_CPU_CYCLES
>
> Each attribute/file contains HW ID event translation for the currently
> running CPU model
>
> # cat /sys/devices/cpu/events/instructions
> 0xc0

Why not have it consistent with the stuff done for uncore where events
read: 'event=0xc0', ie the regular field=value stuff.




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