Re: [RFC][PATCH 3/9] perf: export registerred pmus via sysfs

From: Peter Zijlstra
Date: Mon May 10 2010 - 05:40:36 EST


On Mon, 2010-05-10 at 17:27 +0800, Lin Ming wrote:
> Export pmus via sysfs /sys/devices/system/cpu/pmus/0...N
> The file name is the pmu id, ie, /sys/devices/system/cpu/pmus/N
> represents pmu id N.
> So perf tool can use it to initialize perf_event_attr.

Why create a whole new directory, why not:

/sys/devices/system/cpu/cpuN/pmu_id ?

That way we can simply extend it to things like:

/sys/devices/system/cpu/cpuN/nodeN/pmu_id
/sys/devices/system/node/nodeN/pmi_id

Instead of having to add something like:

/sys/devices/system/node/pmus/0..N


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