linux-kernel - Re: [RFC PATCH 0/1] perf test cs-etm: Add end-to-end tests for CoreSight decoding

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Date:   Mon, 23 May 2022 14:29:28 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     German Gomez <german.gomez@....com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, james.clark@....com,
        leo.yan@...aro.org, Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [RFC PATCH 0/1] perf test cs-etm: Add end-to-end tests for
 CoreSight decoding

On Mon, May 23, 2022 at 1:05 PM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> Em Mon, May 23, 2022 at 03:49:51PM +0100, German Gomez escreveu:
> > Hi
> >
> > While discussing running more tests for CoreSight, we thought it might
> > be a good idea to upstream some EndToEnd tests for CoreSight decoding in
> > order to lock down the behaviour. I am sending this as RFC to get some
> > feedback from the community first.
> >
> > The test relies on pre-geneated perf.data files that are downloaded
> > during the test. I'm not sure it's a good idea to commit those files to
> > the Linux repository, so they would have to live in an external source
> > and be downloaded during the test.
>
> That is ok, but please cache it locally, so that from the second 'perf
> test' run onwards one doesn´t have to incur in the download delay and
> also be able to run the tests while not connected.

I have some continuous tests running that don't have internet access.
Could we have an environment variable to give a path to an already
downloaded version? I may be able to fake having a cached downloaded
version. Where would such a download live?

Thanks,
Ian

> - Arnaldo
>
> > For this RFC, the files are stored in a Github repository [1]. As an
> > idea, I think we could store them in a new repo in the ARM-software
> > namespace. Any hosting suggestions are very welcome.
> >
> > Thanks,
> > German
> >
> > [1] https://github.com/ARM-software/data/tree/984cde8fb0bb22591e284826a80b338bb79c3655/perf/coresight
> >
> > German Gomez (1):
> >   perf test cs-etm: Add end-to-end tests for CoreSight decoding
> >
> >  tools/perf/tests/shell/lib/arm_auxtrace.sh    | 21 +++++++
> >  .../tests/shell/test_arm_coresight_decoder.sh | 57 +++++++++++++++++++
> >  2 files changed, 78 insertions(+)
> >  create mode 100644 tools/perf/tests/shell/lib/arm_auxtrace.sh
> >  create mode 100755 tools/perf/tests/shell/test_arm_coresight_decoder.sh
> >
> > --
> > 2.25.1
>
> --
>
> - Arnaldo