Messages in this thread | | | Date | Fri, 30 Sep 2022 10:01:59 +0530 | Subject | Re: Invalid event (cycles:pp) in per-thread mode, enable system wide with '-a'. | From | Ravi Bangoria <> |
| |
On 30-Sep-22 9:56 AM, Namhyung Kim wrote: > Hello, > > On Thu, Sep 29, 2022 at 8:49 PM Ian Rogers <irogers@google.com> wrote: >> >> 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. > > Afaik cvcles:pp will use IBS but it doesn't support per-task profiling > since it has no task context. Ravi is working on it..
Right. https://lore.kernel.org/lkml/20220829113347.295-1-ravi.bangoria@amd.com
Thanks, Ravi
| |