Re: [PATCH v3 03/46] perf stat: Introduce skippable evsels

[Ian Rogers]

On Mon, May 1, 2023 at 1:25 PM Liang, Kan <kan.liang@xxxxxxxxxxxxxxx> wrote:
>
>
>
> On 2023-05-01 11:29 a.m., Ian Rogers wrote:
> > The events are displayed twice as there are 2 groups of events. This
> > is changed by:
> > https://lore.kernel.org/lkml/20230429053506.1962559-5-irogers@xxxxxxxxxx/
> > where the events are no longer grouped.
>
> The trick seems don't work on a hybrid machine. I still got the
> duplicate Topdown events on e-core.

For hybrid the rest of the patch series is necessary, ie the patches
beyond what's for 6.4, which I take from the output (ie not a crash)
you are looking at. As multiple groups are in play then it looks like
the atom events are on >1 PMU which can happen as the x86 code special
cases events with topdown in their name. Some fixes in the series for
this are:
https://lore.kernel.org/lkml/20230429053506.1962559-6-irogers@xxxxxxxxxx/
https://lore.kernel.org/lkml/20230429053506.1962559-40-irogers@xxxxxxxxxx/
and related:
https://lore.kernel.org/lkml/20230429053506.1962559-19-irogers@xxxxxxxxxx/
and so fixing this requires some detective work.

I don't think it should be a requirement for the series that all
hybrid bugs are fixed - especially given the complaints against the
length of the series as-is.

Thanks,
Ian

>          38,841.16 msec cpu-clock                        #   32.009 CPUs
> utilized
>                256      context-switches                 #    6.591 /sec
>                 33      cpu-migrations                   #    0.850 /sec
>                 84      page-faults                      #    2.163 /sec
>         21,910,584      cpu_core/cycles/                 #  564.107 K/sec
>        248,153,249      cpu_atom/cycles/                 #    6.389
> M/sec                       (53.85%)
>         27,463,908      cpu_core/instructions/           #  707.083 K/sec
>        118,661,014      cpu_atom/instructions/           #    3.055
> M/sec                       (63.06%)
>          4,652,941      cpu_core/branches/               #  119.794 K/sec
>         20,173,082      cpu_atom/branches/               #  519.374
> K/sec                       (63.18%)
>             72,727      cpu_core/branch-misses/          #    1.872 K/sec
>          1,143,187      cpu_atom/branch-misses/          #   29.432
> K/sec                       (63.51%)
>        125,630,586      cpu_core/TOPDOWN.SLOTS/          #      nan %
> tma_backend_bound
>                                                   #      nan %  tma_retiring
>                                                   #      0.0 %
> tma_bad_speculation
>                                                   #      nan %
> tma_frontend_bound
>         30,254,701      cpu_core/topdown-retiring/
>        149,075,726      cpu_atom/TOPDOWN_RETIRING.ALL/   #    3.838 M/sec
>                                                   #     14.8 %
> tma_bad_speculation      (63.82%)
>    <not supported>      cpu_core/topdown-bad-spec/
>        523,614,383      cpu_atom/TOPDOWN_FE_BOUND.ALL/   #   13.481 M/sec
>                                                   #     42.0 %
> tma_frontend_bound       (64.15%)
>        385,502,477      cpu_atom/TOPDOWN_BE_BOUND.ALL/   #    9.925 M/sec
>                                                   #     30.9 %
> tma_backend_bound
>                                                   #     30.9 %
> tma_backend_bound_aux    (64.39%)
>        249,534,488      cpu_atom/CPU_CLK_UNHALTED.CORE/  #    6.424 M/sec
>                                                   #     12.2 %
> tma_retiring             (64.18%)
>        151,729,465      cpu_atom/TOPDOWN_RETIRING.ALL/   #    3.906
> M/sec                       (54.67%)
>        530,621,769      cpu_atom/TOPDOWN_FE_BOUND.ALL/   #   13.661
> M/sec                       (54.30%)
>    <not supported>      cpu_core/topdown-fe-bound/
>        383,694,745      cpu_atom/TOPDOWN_BE_BOUND.ALL/   #    9.879
> M/sec                       (53.96%)
>    <not supported>      cpu_core/topdown-be-bound/
>            105,850      cpu_core/INT_MISC.UOP_DROPPING/  #    2.725 K/sec
>
>        1.213449538 seconds time elapsed
>
> Thanks,
> Kan