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

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Date:   Mon, 1 May 2023 19:34:25 -0400
From:   "Liang, Kan" <kan.liang@...ux.intel.com>
To:     Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>
Cc:     Weilin Wang <weilin.wang@...el.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ahmad Yasin <ahmad.yasin@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Perry Taylor <perry.taylor@...el.com>,
        Samantha Alt <samantha.alt@...el.com>,
        Caleb Biggers <caleb.biggers@...el.com>,
        Edward Baker <edward.baker@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Florian Fischer <florian.fischer@...q.space>,
        Rob Herring <robh@...nel.org>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        John Garry <john.g.garry@...cle.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Sumanth Korikkar <sumanthk@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Leo Yan <leo.yan@...aro.org>,
        Yang Jihong <yangjihong1@...wei.com>,
        James Clark <james.clark@....com>,
        Suzuki Poulouse <suzuki.poulose@....com>,
        Kang Minchul <tegongkang@...il.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 03/46] perf stat: Introduce skippable evsels



On 2023-05-01 4:48 p.m., Ian Rogers wrote:
> On Mon, May 1, 2023 at 1:25 PM Liang, Kan <kan.liang@...ux.intel.com> 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@google.com/
>>> 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@google.com/
> https://lore.kernel.org/lkml/20230429053506.1962559-40-irogers@google.com/
> and related:
> https://lore.kernel.org/lkml/20230429053506.1962559-19-irogers@google.com/
> and so fixing this requires some detective work.
>

I applied all the patches of the series when I did the test on hybrid.
The above patches don't help.


> 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.

I agree especially considering the metrics have been broken on the
hybrid for a while.

I just want to do a complete test and understand what is going to fixed
and what hasn't.

Thanks,
Kan