linux-kernel - Re: [PATCH v1] perf test: Add basic perf diff test

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Message-ID: <CAP-5=fVo+YVAc44Pkes-bXp4Tm605x6RuRi=EdFJeGEEE4iwkQ@mail.gmail.com>
Date:   Tue, 5 Dec 2023 08:52:04 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        atrajeev@...ux.vnet.ibm.com
Subject: Re: [PATCH v1] perf test: Add basic perf diff test

On Mon, Dec 4, 2023 at 9:44 PM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> On 4/12/23 18:00, Ian Rogers wrote:
> > On Mon, Nov 20, 2023 at 11:04 AM Ian Rogers <irogers@...gle.com> wrote:
> >>
> >> There are some old bug reports on perf diff crashing:
> >> https://rhaas.blogspot.com/2012/06/perf-good-bad-ugly.html
> >>
> >> Happening across them I was prompted to add two very basic tests that
> >> will give some perf diff coverage.
> >>
> >> Signed-off-by: Ian Rogers <irogers@...gle.com>
> >
> > Ping.
> >
> > Thanks,
> > Ian
> >
> >> ---
> >>  tools/perf/tests/shell/diff.sh | 101 +++++++++++++++++++++++++++++++++
> >>  1 file changed, 101 insertions(+)
> >>  create mode 100755 tools/perf/tests/shell/diff.sh
> >>
> >> diff --git a/tools/perf/tests/shell/diff.sh b/tools/perf/tests/shell/diff.sh
> >> new file mode 100755
> >> index 000000000000..213185763688
> >> --- /dev/null
> >> +++ b/tools/perf/tests/shell/diff.sh
> >> @@ -0,0 +1,101 @@
> >> +#!/bin/sh
> >> +# perf diff tests
> >> +# SPDX-License-Identifier: GPL-2.0
> >> +
> >> +set -e
> >> +
> >> +err=0
> >> +perfdata1=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
> >> +perfdata2=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
> >> +perfdata3=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
> >> +testprog="perf test -w thloop"
> >> +testsym="test_loop"
>
> Could it benefit from skip_test_missing_symbol

Good idea, sent:
https://lore.kernel.org/lkml/20231205164924.835682-1-irogers@google.com/

Thanks,
Ian