linux-kernel - Re: [PATCH] perf report: Fix hierarchy mode on pipe input

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Date:   Thu, 26 Oct 2023 10:11:11 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, Ian Rogers <irogers@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH] perf report: Fix hierarchy mode on pipe input

On Tue, 24 Oct 2023 17:31:21 -0700, Namhyung Kim wrote:
> The hierarchy mode needs to setup output formats for each evsel.
> Normally setup_sorting() handles this at the beginning, but it cannot
> do that if data comes from a pipe since there's no evsel info before
> reading the data.  And then perf report cannot process the samples
> in hierarchy mode and think as if there's no sample.
> 
> Let's check the condition and setup the output formats after reading
> data so that it can find evsels.
> 
> [...]

Applied to perf-tools-next, thanks!