linux-kernel - Re: [PATCH 3/8] perf test: Use a test program in perf record tests

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Date:   Mon, 24 Oct 2022 17:00:14 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ian Rogers <irogers@...gle.com>
Cc:     Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH 3/8] perf test: Use a test program in perf record tests

On 24/10/22 14:33, Arnaldo Carvalho de Melo wrote:
> Em Thu, Oct 20, 2022 at 04:52:14PM -0700, Ian Rogers escreveu:
>> On Thu, Oct 20, 2022 at 10:26 AM Namhyung Kim <namhyung@...nel.org> wrote:
> 
>>> If the system has cc it could build a test program with two threads
>>> and then use it for more detailed testing.  Also it accepts an option
>>> to run a thread forever to ensure multi-thread runs.
>>>
>>> If cc is not found, it falls back to use the default value 'true'.
>>>
>>> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
>>
>> Acked-by: Ian Rogers <irogers@...gle.com>
>>
>> I wonder if these utilities should just be built into perf to avoid
>> the cc dependency. Perhaps we can have a hidden option built into perf
>> test.
> 
> Agreed, not depending on a compiler makes 'perf test' usable in more
> systems, particularly production ones where we may want to check if perf
> is passing all tests applicable to that system.

I haven't seen anyone package anything except the perf executable, so
I presume the only people running these tests install the source, and
so need a compiler anyway.