Messages in this thread | | | From | Ian Rogers <> | Date | Thu, 29 Sep 2022 20:23:45 -0700 | Subject | Re: Invalid event (cycles:pp) in per-thread mode, enable system wide with '-a'. |
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On Thu, Sep 29, 2022 at 3:10 PM Slade Watkins <srw@sladewatkins.net> wrote: > > Hey Nick, > > > On Sep 29, 2022, at 5:54 PM, Nick Desaulniers <ndesaulniers@google.com> wrote: > > > > I remember hearing rumblings about issues with zen 2, LBR, vs zen 3. > > Is this a known issue, or am I holding it wrong? > > Hm… I also remember this. I have a Zen 2 based system that I can do testing on, so I will do so when I’m able. > > If I discover something of note, I’ll get back to you. > > Cheers, > -srw >
LBR isn't yet supported for Zen but is coming: https://lore.kernel.org/lkml/166155216401.401.5809694678609694438.tip-bot2@tip-bot2/ I'd recommend frame-pointers.
+Ravi who may be able to say if there are any issues with the precise sampling on AMD.
Thanks, Ian
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