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

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Date:   Wed, 6 Dec 2023 10:26:07 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Adrian Hunter <adrian.hunter@...el.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@...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

Em Tue, Dec 05, 2023 at 08:52:04AM -0800, Ian Rogers escreveu:
> 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/

Applied, and added this:

Suggested-by: Adrian Hunter <adrian.hunter@...el.com>

Thanks,

- Arnaldo