linux-kernel - Re: [PATCH] perf stat: Fix display of grouped aliased events.

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Date:   Sun, 6 Feb 2022 08:55:17 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Ian Rogers <irogers@...gle.com>, vineet.singh@...el.com,
        perry.taylor@...el.com, caleb.biggers@...el.com,
        asaf.yaffe@...el.com, kshipra.bopardikar@...el.com,
        Kan Liang <kan.liang@...ux.intel.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        James Clark <james.clark@....com>,
        John Garry <john.garry@...wei.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf stat: Fix display of grouped aliased events.

Em Fri, Feb 04, 2022 at 05:48:20PM -0800, Andi Kleen escreveu:
> 
> On 2/4/2022 5:09 PM, Ian Rogers wrote:
> > An event may have a number of uncore aliases that when added to
> > the evlist are consecutive. If there are multiple uncore events
> > in a group then parse_events__set_leader_for_uncore_aliase will
> > reorder the evlist so that events on the same PMU are
> > adjacent. collect_all_aliases assumes that aliases are in blocks
> > so that only the first counter is printed and all others are
> > marked merged. The reordering for groups breaks the assumption
> > and so all counts are printed. This change removes the assumption
> > from collect_all_aliases that the events are in blocks and
> > instead processes the entire evlist.
> 
> Looks good to me.
> 
> Reviewed-by: Andi Kleen <ak@...ux.intel.com>

Thanks, applied.

- Arnaldo