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

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Message-ID: <b6e28614-e348-b490-bf33-af5810a60722@huawei.com>
Date:   Fri, 13 May 2022 17:26:32 +0100
From:   John Garry <john.garry@...wei.com>
To:     Ian Rogers <irogers@...gle.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 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?

Thanks,
John