Re: [PATCH 0/4] perf: Intel uncore pmu counting support

[Stephane Eranian]

On Thu, Jun 30, 2011 at 10:09 AM, Lin Ming <ming.m.lin@xxxxxxxxx> wrote:
> Hi, all
>
> I posted uncore patches months ago, but it was pended due to an uncore
> interrupt problem.
>
> This series are cut to support uncore pmu counting only.
> So uncore interrupt handling is not needed.
>
You're making the assumption that when counting, you can never construct
a measurement that will cause a counter to overflow the 39 bits. If not, then
you need interrupt handling even when counting.


> The uncore pmu type is allocated dynamically and exported via sysfs.
> $ cat /sys/bus/event_source/devices/uncore/type
> 6
>
> You can count uncore raw events as below,
> $ perf stat -e uncore:r0101 ls
>
> It reads uncore pmu type id from sysfs to setup perf_event_attr::type.
>
> Comments are appreciated.
>
> Thanks,
> Lin Ming
>
>
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