linux-kernel - Re: [PATCH 1/7] perf test: Skip reason for suites with 1 test

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Message-ID: <CAP-5=fVA+x_sNuWCOMj9ASBpFanms8DkAvLkbs5URDvcBW1itg@mail.gmail.com>
Date:   Fri, 13 May 2022 09:34:27 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     John Garry <john.garry@...wei.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>,
        Riccardo Mancini <rickyman7@...il.com>,
        Sohaib Mohamed <sohaib.amhmd@...il.com>,
        Carsten Haitzler <carsten.haitzler@....com>,
        Marco Elver <elver@...gle.com>,
        Michael Petlan <mpetlan@...hat.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 1/7] perf test: Skip reason for suites with 1 test

On Fri, May 13, 2022 at 9:26 AM John Garry <john.garry@...wei.com> wrote:
>
> On 13/05/2022 16:42, Ian Rogers wrote:
> >> I was not sure which suite has a single tastcase, so I experimented for
> >> libpfm4 by deleting a testcase so it has only 1x remaining, I get:
> >>
> >> before your change:
> >> john@...alhost:~/acme/tools/perf> sudo ./perf test 63
> >> 63: Test libpfm4 support : Skip
> >>
> >> after:
> >>
> >> john@...alhost:~/acme/tools/perf> sudo ./perf test 63
> >> 63: Test libpfm4 support : Skip (not compiled in)
> >>
> >> Although it is odd to have a single sub-test, is there a reason for
> >> which we don't print its name? We print the name when there are multiple
> >> sub-tests.
> > The reason was to replicate the existing "perf test" behavior before
> > the kunit style transition. The main place we get tests with a single
> > sub-test is from the DEFINE_SUITE macro:
> > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/tests/tests.h?h=perf/core#n67
> > I agree it looks kind of weird and was inheriting the data structures
> > from kunit and the format of the output from perf test.
>
> Out of curiosity, which suite is this that you find only has a single
> subtest? Does it possibly only have a single subtest as some others may
> be compiled out?

I was getting it when I added a skip message to the openat syscall
tests in patch 3:
https://lore.kernel.org/lkml/20220513040519.1499333-4-irogers@google.com/

I didn't see any changes with any existing tests.

Thanks,
Ian

> Thanks,
> John