linux-kernel - Re: [PATCH] perf test: Fix test-record-dummy-C0 failure for supported PERF_FORMAT

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Message-ID: <CAM9d7ciuLiYRT0tyhXSrZLqe9uhLNw=zGK4Tj6-GG5WQALP3-Q@mail.gmail.com>
Date:   Sat, 16 Sep 2023 22:36:19 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Yang Jihong <yangjihong1@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf test: Fix test-record-dummy-C0 failure for supported
 PERF_FORMAT_LOST feature kernel

On Sat, Sep 16, 2023 at 2:18 AM Yang Jihong <yangjihong1@...wei.com> wrote:
>
> For kernel that supports PERF_FORMAT_LOST, attr->read_format has
> PERF_FORMAT_LOST bit. Update expected value of
> attr->read_format of test-record-dummy-C0 for this scenario.
>
> Before:
>
>   # ./perf test 17 -vv
>    17: Setup struct perf_event_attr                                    :
>   --- start ---
>   test child forked, pid 1609441
>   <SNIP>
>   running './tests/attr/test-record-dummy-C0'
>     'PERF_TEST_ATTR=/tmp/tmpm3s60aji ./perf record -o /tmp/tmpm3s60aji/perf.data --no-bpf-event -e dummy -C 0 kill >/dev/null 2>&1' ret '1', expected '1'
>   expected read_format=4, got 20
>   FAILED './tests/attr/test-record-dummy-C0' - match failure
>   test child finished with -1
>   ---- end ----
>   Setup struct perf_event_attr: FAILED!
>
> After:
>
>   # ./perf test 17 -vv
>    17: Setup struct perf_event_attr                                    :
>   --- start ---
>   test child forked, pid 1609441
>   <SNIP>
>   running './tests/attr/test-record-dummy-C0'
>     'PERF_TEST_ATTR=/tmp/tmppa9vxcb7 ./perf record -o /tmp/tmppa9vxcb7/perf.data --no-bpf-event -e dummy -C 0 kill >/dev/null 2>&1' ret '1', expected '1'
>   <SNIP>
>   test child finished with 0
>   ---- end ----
>   Setup struct perf_event_attr: Ok
>
> Reported-by: Namhyung Kim <namhyung@...nel.org>
> Closes: https://lore.kernel.org/all/CAM9d7cgNH2+zhSAmA3en_6as915UsF25MoLbfjE350tAP43Bog@mail.gmail.com/

I'll change it to follow the existing style like

Fixes: d50ad02cb39a ("perf test: Add perf_event_attr test for record
dummy event")

> Signed-off-by: Yang Jihong <yangjihong1@...wei.com>

Tested-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung


> ---
>  tools/perf/tests/attr/test-record-dummy-C0 | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/tests/attr/test-record-dummy-C0 b/tools/perf/tests/attr/test-record-dummy-C0
> index 83ca4e373acd..576ec48b3aaf 100644
> --- a/tools/perf/tests/attr/test-record-dummy-C0
> +++ b/tools/perf/tests/attr/test-record-dummy-C0
> @@ -17,7 +17,7 @@ sample_period=4000
>  # PERF_SAMPLE_PERIOD
>  # + PERF_SAMPLE_CPU added by -C 0
>  sample_type=391
> -read_format=4
> +read_format=4|20
>  disabled=0
>  inherit=1
>  pinned=0
> --
> 2.34.1
>