linux-kernel - Re: [PATCH 1/2] perf tests: Fix "perf stat JSON output linter" test for new output

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Date:   Wed, 30 Nov 2022 10:18:49 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     James Clark <james.clark@....com>
Cc:     linux-perf-users@...r.kernel.org, acme@...nel.org,
        namhyung@...nel.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>
Subject: Re: [PATCH 1/2] perf tests: Fix "perf stat JSON output linter" test
 for new output

On Wed, Nov 30, 2022 at 3:15 AM James Clark <james.clark@....com> wrote:
>
> Commit c4b41b83c250 ("perf stat: Rename "aggregate-number" to
> "cpu-count" in JSON") renamed a field, so update the tests to reflect
> this.
>
> This fixes the following failure:
>
>   $ sudo ./perf test "json output" -vvv
>    96: perf stat JSON output linter                                    :
>   --- start ---
>   test child forked, pid 327720
>   Checking json output: no args [Success]
>   Checking json output: system wide [Success]
>   Checking json output: interval [Success]
>   Checking json output: event [Success]
>   Checking json output: per thread [Success]
>   Checking json output: per node Test failed for input:
>   ...
>   Traceback (most recent call last):
>     File "./tools/perf/tests/shell/lib/perf_json_output_lint.py", line 93, in <module>
>       check_json_output(expected_items)
>     File "./tools/perf/tests/shell/lib/perf_json_output_lint.py", line 78, in check_json_output
>       raise RuntimeError(f'Unexpected key: key={key} value={value}')
>   RuntimeError: Unexpected key: key=cpu-count value=16
>   test child finished with -1
>   ---- end ----
>   perf stat JSON output linter: FAILED!
>
> Fixes: c4b41b83c250 ("perf stat: Rename "aggregate-number" to "cpu-count" in JSON")
> Signed-off-by: James Clark <james.clark@....com>

Namhyung mentioned reverting change c4b41b83c250, in which case
merging this would break the test again. I think the revert is better.

Thanks,
Ian

> ---
>  tools/perf/tests/shell/lib/perf_json_output_lint.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/tests/shell/lib/perf_json_output_lint.py b/tools/perf/tests/shell/lib/perf_json_output_lint.py
> index d90f8d102eb9..9c073e257d33 100644
> --- a/tools/perf/tests/shell/lib/perf_json_output_lint.py
> +++ b/tools/perf/tests/shell/lib/perf_json_output_lint.py
> @@ -54,7 +54,7 @@ def check_json_output(expected_items):
>            raise RuntimeError(f'wrong number of fields. counted {count} expected {expected_items}'
>                               f' in \'{line}\'')
>    checks = {
> -      'aggregate-number': lambda x: isfloat(x),
> +      'cpu-count': lambda x: isfloat(x),
>        'core': lambda x: True,
>        'counter-value': lambda x: is_counter_value(x),
>        'cgroup': lambda x: True,
> --
> 2.25.1
>