linux-kernel - Re: [PATCH] perf test: Add cgroup summary test case for perf trace

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Message-ID: <aDDy4FQe7sBwECL8@google.com>
Date: Fri, 23 May 2025 15:12:48 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Howard Chu <howardchu95@...il.com>, Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: Re: [PATCH] perf test: Add cgroup summary test case for perf trace

On Thu, May 22, 2025 at 07:11:41PM -0300, Arnaldo Carvalho de Melo wrote:
> On Thu, May 22, 2025 at 01:49:37PM -0300, Arnaldo Carvalho de Melo wrote:
> > On Thu, May 22, 2025 at 08:33:16AM -0700, Howard Chu wrote:
> > > $ sudo /tmp/perf/perf test -vv 112
> > > 112: perf trace summary:
> > > 112: perf trace summary
> > > --- start ---
> > > test child forked, pid 1574993
> > > testing: perf trace -s -- true
> > > testing: perf trace -S -- true
> > > testing: perf trace -s --summary-mode=thread -- true
> > > testing: perf trace -S --summary-mode=total -- true
> > > testing: perf trace -as --summary-mode=thread --no-bpf-summary -- true
> > > testing: perf trace -as --summary-mode=total --no-bpf-summary -- true
> > > testing: perf trace -as --summary-mode=thread --bpf-summary -- true
> > > testing: perf trace -as --summary-mode=total --bpf-summary -- true
> > > testing: perf trace -aS --summary-mode=total --bpf-summary -- true
> > > testing: perf trace -as --summary-mode=cgroup --bpf-summary -- true
> > > testing: perf trace -aS --summary-mode=cgroup --bpf-summary -- true
> > > ---- end(0) ----
> > > 112: perf trace summary                                              : Ok
>  
> > Thanks, tested and applied to perf-tools-next,
> 
> But then when running all the tests, since this does system wide
> tracing, it fails:
> 
> 112: perf trace summary                                              : FAILED!
> 
> It works with the following patch applied, please check and ack/review:
> 
> From 8c868979d886e2e88aa89f4e3d884e1b6450a7b2 Mon Sep 17 00:00:00 2001
> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> Date: Thu, 22 May 2025 19:01:47 -0300
> Subject: [PATCH 1/1] perf tests trace_summary.sh: Run in exclusive mode
> 
> And it is being successfull only when running alone, probably because
> there are some tests that add the vfs_getname probe that gets used by
> 'perf trace' and alter how it does syscall arg pathname resolution.
> 
> This should be removed or made a fallback to the preferred BPF mode of
> getting syscall parameters, but till then, run this in exclusive mode.
> 
> For reference, here are some of the tests that run close to this one:
> 
>   127: perf record offcpu profiling tests                              : Ok
>   128: perf all PMU test                                               : Ok
>   129: perf stat --bpf-counters test                                   : Ok
>   130: Check Arm CoreSight trace data recording and synthesized samples: Skip
>   131: Check Arm CoreSight disassembly script completes without errors : Skip
>   132: Check Arm SPE trace data recording and synthesized samples      : Skip
>   133: Test data symbol                                                : Ok
>   134: Miscellaneous Intel PT testing                                  : Skip
>   135: test Intel TPEBS counting mode                                  : Skip
>   136: perf script task-analyzer tests                                 : Ok
>   137: Check open filename arg using perf trace + vfs_getname          : Ok
>   138: perf trace summary                                              : Ok
> 
> Cc: Adrian Hunter <adrian.hunter@...el.com>
> Cc: Howard Chu <howardchu95@...il.com>
> Cc: Ian Rogers <irogers@...gle.com>
> Cc: James Clark <james.clark@...aro.org>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Kan Liang <kan.liang@...ux.intel.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>

Looks good to me.

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung

> ---
>  tools/perf/tests/shell/trace_summary.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/tests/shell/trace_summary.sh b/tools/perf/tests/shell/trace_summary.sh
> index bb350dfabdc2bf5e..49766524dc21b534 100755
> --- a/tools/perf/tests/shell/trace_summary.sh
> +++ b/tools/perf/tests/shell/trace_summary.sh
> @@ -1,5 +1,5 @@
>  #!/bin/sh
> -# perf trace summary
> +# perf trace summary (exclusive)
>  # SPDX-License-Identifier: GPL-2.0
>  
>  # Check that perf trace works with various summary mode
> -- 
> 2.49.0
>