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SubjectRe: [PATCH 06/13] perf vendor events powerpc: Remove duplicate events
On Mon, Sep 04, 2017 at 11:00:37AM -0300, Arnaldo Carvalho de Melo wrote:
> From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
>
> Some POWER PMU event names have multiple/alternate event codes. These
> alternate event codes were listed in the POWER9 JSON files for
> reference.
>
> But the perf tool does not seem to handle duplicates cleanly. 'perf
> list' shows such duplicate events only once, but 'perf stat' ends up
> counting the first event code twice, multiplexing if necessary and we
> end up with double the event counts.
>
> Remove the duplicate event codes from the JSON files for now.

It would be better to fix it in perf. I assume it wouldn't be that hard.
Intel may get multiple versions of events at some point too,
as events get renamed, but the old names stay around for compatibility.

-Andi

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