perf test: Fix test-record-dummy-C0 failure for supported PERF_FORMAT_LOST feature kernel

  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@kernel.org>
Closes: https://lore.kernel.org/all/CAM9d7cgNH2+zhSAmA3en_6as915UsF25MoLbfjE350tAP43Bog@mail.gmail.com/
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
---
 tools/perf/tests/attr/test-record-dummy-C0 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
  

On Sat, Sep 16, 2023 at 2:18 AM Yang Jihong <yangjihong1@huawei.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@kernel.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@huawei.com>

Tested-by: Namhyung Kim <namhyung@kernel.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
>
  

On Sat, Sep 16, 2023 at 10:36 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> On Sat, Sep 16, 2023 at 2:18 AM Yang Jihong <yangjihong1@huawei.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@kernel.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@huawei.com>
>
> Tested-by: Namhyung Kim <namhyung@kernel.org>

Applied to perf-tools-next, thanks!

Namhyung