linux-kernel - Re: [PATCH] perf test: Do not fail Intel-PT misc test w/o libpython

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Date:   Fri, 21 Oct 2022 09:25:15 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>,
        Ian Rogers <irogers@...gle.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org, Ammy Yi <ammy.yi@...el.com>
Subject: Re: [PATCH] perf test: Do not fail Intel-PT misc test w/o libpython

Hi Adrian and Ian,

On Thu, Oct 20, 2022 at 10:22 PM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> On 20/10/22 22:29, Namhyung Kim wrote:
> > The virtuall LBR test uses a python script to check the max size of
> > branch stack in the Intel-PT generated LBR.  But it didn't check whether
> > python scripting is available (as it's optional).
> >
> > Let's skip the test if the python support is not available.
> >
> > Fixes: f77811a0f625 ("perf test: test_intel_pt.sh: Add 9 tests")
> > Cc: Ammy Yi <ammy.yi@...el.com>
> > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> > ---
> >  tools/perf/tests/shell/test_intel_pt.sh | 6 ++++++
> >  1 file changed, 6 insertions(+)
> >
> > diff --git a/tools/perf/tests/shell/test_intel_pt.sh b/tools/perf/tests/shell/test_intel_pt.sh
> > index 4c0aabbe33bd..e66b7d977462 100755
> > --- a/tools/perf/tests/shell/test_intel_pt.sh
> > +++ b/tools/perf/tests/shell/test_intel_pt.sh
> > @@ -526,6 +526,12 @@ test_kernel_trace()
> >  test_virtual_lbr()
> >  {
> >       echo "--- Test virtual LBR ---"
> > +     # Check if python script is supported
> > +     libpython=$(ldd $(which perf) | grep -c python)
>
> 'which' might not be installed.  Don't about 'ldd'.
>
> Maybe 'perf version --build-options' can be used instead e.g.
>
> $ perf version --build-options | grep -i libpython | grep -vi off
>              libpython: [ on  ]  # HAVE_LIBPYTHON_SUPPORT

Thanks for the suggestion, will change.

Thanks,
Namhyung