Messages in this thread | | | Date | Mon, 4 Sep 2017 09:51:06 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH 06/13] perf vendor events powerpc: Remove duplicate events |
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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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