Messages in this thread | | | Date | Mon, 7 Dec 2015 14:51:07 +0100 | From | Peter Zijlstra <> | Subject | Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp |
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On Sun, Dec 06, 2015 at 02:11:02PM +0100, Ingo Molnar wrote:
> the symptom is that latest 'perf top' and 'perf record' produces no samples. > > So I've removed this commit and the related Skylake commit from -tip: > > 4576ceaa56a8 perf/x86: Use INST_RETIRED.PREC_DIST for cycles:ppp > ac1e1d30cf90 perf/x86: Use INST_RETIRED.TOTAL_CYCLES_PS for cycles:pp for Skylake > > you need to do better testing next time around. Note: if you resubmit the patches, > please also pick up the updates commit changelogs from the tip-bot emails, don't > use your original changelogs.
OK, so I need:
lkml.kernel.org/r/1449177740-5422-1-git-send-email-andi@firstfloor.org lkml.kernel.org/r/1449177740-5422-2-git-send-email-andi@firstfloor.org
On my IVB because that keeps triggering that case with :ppp, other than that this seems to work fine on IVB.
I've also tried on SNB (which does not support the new :ppp thing) and that too works.
Sadly I do not have older hardware anymore :/
Also, perf tools DTRT and will use :ppp by default if available.
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