linux-kernel - RE: [RFC PATCH v10 8/8] perf test: Add test for Intel TPEBS counting mode

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Date: Mon, 3 Jun 2024 17:00:54 +0000
From: "Wang, Weilin" <weilin.wang@...el.com>
To: Namhyung Kim <namhyung@...il.com>
CC: "namhyung@...gle.com" <namhyung@...gle.com>, Namhyung Kim
	<namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>, "Arnaldo Carvalho de
 Melo" <acme@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar
	<mingo@...hat.com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>, "Hunter, Adrian" <adrian.hunter@...el.com>, Kan
 Liang <kan.liang@...ux.intel.com>, "linux-perf-users@...r.kernel.org"
	<linux-perf-users@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "Taylor, Perry" <perry.taylor@...el.com>,
	"Alt, Samantha" <samantha.alt@...el.com>, "Biggers, Caleb"
	<caleb.biggers@...el.com>
Subject: RE: [RFC PATCH v10 8/8] perf test: Add test for Intel TPEBS counting
 mode



> -----Original Message-----
> From: Namhyung Kim <namhyung@...il.com>
> Sent: Sunday, June 2, 2024 4:21 PM
> To: Wang, Weilin <weilin.wang@...el.com>
> Cc: namhyung@...gle.com; Namhyung Kim <namhyung@...nel.org>; Ian
> Rogers <irogers@...gle.com>; Arnaldo Carvalho de Melo
> <acme@...nel.org>; Peter Zijlstra <peterz@...radead.org>; Ingo Molnar
> <mingo@...hat.com>; Alexander Shishkin
> <alexander.shishkin@...ux.intel.com>; Jiri Olsa <jolsa@...nel.org>; Hunter,
> Adrian <adrian.hunter@...el.com>; Kan Liang <kan.liang@...ux.intel.com>;
> linux-perf-users@...r.kernel.org; linux-kernel@...r.kernel.org; Taylor, Perry
> <perry.taylor@...el.com>; Alt, Samantha <samantha.alt@...el.com>; Biggers,
> Caleb <caleb.biggers@...el.com>
> Subject: Re: [RFC PATCH v10 8/8] perf test: Add test for Intel TPEBS counting
> mode
> 
> From: namhyung@...gle.com
> 
> On Wed, 29 May 2024 02:43:24 -0400 weilin.wang@...el.com wrote:
> 
> > From: Weilin Wang <weilin.wang@...el.com>
> >
> > Intel TPEBS sampling mode is supported through perf record. The counting
> mode
> > code uses perf record to capture retire_latency value and use it in metric
> > calculation. This test checks the counting mode code.
> >
> > Signed-off-by: Weilin Wang <weilin.wang@...el.com>
> > ---
> >  .../perf/tests/shell/test_stat_intel_tpebs.sh | 19 +++++++++++++++++++
> >  1 file changed, 19 insertions(+)
> >  create mode 100755 tools/perf/tests/shell/test_stat_intel_tpebs.sh
> >
> > diff --git a/tools/perf/tests/shell/test_stat_intel_tpebs.sh
> b/tools/perf/tests/shell/test_stat_intel_tpebs.sh
> > new file mode 100755
> > index 000000000000..43f75055fee4
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/test_stat_intel_tpebs.sh
> > @@ -0,0 +1,19 @@
> > +#!/bin/bash
> > +# test Intel TPEBS counting mode
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +set e
> > +err=0
> > +
> > +# Use this event for testing because it should exist in all platforms
> > +e=cache-misses:R
> > +
> > +# Without this cmd option, default value or zero is returned
> > +echo "Testing without --enable-tpebs-recording"
> > +result=$(perf stat -e "$e" true 2>&1)
> > +[[ "$result" =~ "$e" ]] || exit 1
> > +
> > +# In platforms that do not support TPEBS, it should execute without error.
> > +echo "Testing with --enable-tpebs-recording"
> > +result=$(perf stat -e "$e" --enable-tpebs-recording -a sleep 0.01 2>&1)
> > +[[ "$result" =~ "perf record" && "$result" =~ "$e" ]] || exit 1
> 
> I got these build errors:
> 
Sorry about the error! I will fix it. 

Thanks,
Weilin

> Thanks,
> Namhyung
> 
> ---
> 
>   TEST    tests/shell/test_stat_intel_tpebs.sh.shellcheck_log
> 
> In tests/shell/test_stat_intel_tpebs.sh line 6:
> err=0
> ^-^ SC2034 (warning): err appears unused. Verify use (or export if used
> externally).
> 
> 
> In tests/shell/test_stat_intel_tpebs.sh line 14:
> [[ "$result" =~ "$e" ]] || exit 1
>                 ^--^ SC2076 (warning): Remove quotes from right-hand side of =~ to
> match as a regex rather than literally.
> 
> 
> In tests/shell/test_stat_intel_tpebs.sh line 19:
> [[ "$result" =~ "perf record" && "$result" =~ "$e" ]] || exit 1
>                                               ^--^ SC2076 (warning): Remove quotes from right-
> hand side of =~ to match as a regex rather than literally.
> 
> For more information:
>   https://www.shellcheck.net/wiki/SC2034 -- err appears unused. Verify use
> (o...
>   https://www.shellcheck.net/wiki/SC2076 -- Remove quotes from right-hand
> sid...
> make[4]: *** [tests/Build:91:
> tests/shell/test_stat_intel_tpebs.sh.shellcheck_log] Error 1
>