perf test: Fix test perf evlist for z/VM s390x

[PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x

Posted by Thomas Richter 1 week, 5 days ago

Perf test case 'perf evlist tests' fails on z/VM machines on s390.

The failure is causes by event cycles. This event is not available
on virtualized machines like z/VM on s390.
Change to software event cpu-clock to fix this.

    Output before:
      # ./perf test 78
      79: perf evlist tests              : FAILED!
      #

    Output after:
      # ./perf test 78
      79: perf evlist tests              : Ok
      #

Fixes: b04d2b919912 ("perf test: Fix test case perf evlist tests for s390x")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Jan Polensky <japo@linux.ibm.com>
Reviewed-by: Jan Polensky <japo@linux.ibm.com>
Cc: Ian Rogers <irogers@google.com>
---
 tools/perf/tests/shell/evlist.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/shell/evlist.sh b/tools/perf/tests/shell/evlist.sh
index 5632be391710..8a22f4171c07 100755
--- a/tools/perf/tests/shell/evlist.sh
+++ b/tools/perf/tests/shell/evlist.sh
@@ -21,13 +21,13 @@ trap trap_cleanup EXIT TERM INT
 
 test_evlist_simple() {
 	echo "Simple evlist test"
-	if ! perf record -e cycles -o "${perfdata}" true 2> /dev/null
+	if ! perf record -e cpu-clock -o "${perfdata}" true 2> /dev/null
 	then
 		echo "Simple evlist [Failed record]"
 		err=1
 		return
 	fi
-	if ! perf evlist -i "${perfdata}" | grep -q "cycles"
+	if ! perf evlist -i "${perfdata}" | grep -q "cpu-clock"
 	then
 		echo "Simple evlist [Failed to list event]"
 		err=1
-- 
2.52.0

Re: [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x

Posted by Ian Rogers 1 week, 4 days ago

On Mon, Jan 26, 2026 at 2:18 AM Thomas Richter <tmricht@linux.ibm.com> wrote:
>
> Perf test case 'perf evlist tests' fails on z/VM machines on s390.
>
> The failure is causes by event cycles. This event is not available
> on virtualized machines like z/VM on s390.
> Change to software event cpu-clock to fix this.
>
>     Output before:
>       # ./perf test 78
>       79: perf evlist tests              : FAILED!
>       #
>
>     Output after:
>       # ./perf test 78
>       79: perf evlist tests              : Ok
>       #
>
> Fixes: b04d2b919912 ("perf test: Fix test case perf evlist tests for s390x")
> Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
> Tested-by: Jan Polensky <japo@linux.ibm.com>
> Reviewed-by: Jan Polensky <japo@linux.ibm.com>
> Cc: Ian Rogers <irogers@google.com>

Reviewed-by: Ian Rogers <irogers@google.com>

Thanks!
Ian

> ---
>  tools/perf/tests/shell/evlist.sh | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/tests/shell/evlist.sh b/tools/perf/tests/shell/evlist.sh
> index 5632be391710..8a22f4171c07 100755
> --- a/tools/perf/tests/shell/evlist.sh
> +++ b/tools/perf/tests/shell/evlist.sh
> @@ -21,13 +21,13 @@ trap trap_cleanup EXIT TERM INT
>
>  test_evlist_simple() {
>         echo "Simple evlist test"
> -       if ! perf record -e cycles -o "${perfdata}" true 2> /dev/null
> +       if ! perf record -e cpu-clock -o "${perfdata}" true 2> /dev/null
>         then
>                 echo "Simple evlist [Failed record]"
>                 err=1
>                 return
>         fi
> -       if ! perf evlist -i "${perfdata}" | grep -q "cycles"
> +       if ! perf evlist -i "${perfdata}" | grep -q "cpu-clock"
>         then
>                 echo "Simple evlist [Failed to list event]"
>                 err=1
> --
> 2.52.0
>

Re: [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x

Posted by Arnaldo Carvalho de Melo 1 week, 4 days ago

On Mon, Jan 26, 2026 at 09:42:54AM -0800, Ian Rogers wrote:
> On Mon, Jan 26, 2026 at 2:18 AM Thomas Richter <tmricht@linux.ibm.com> wrote:
> >
> > Perf test case 'perf evlist tests' fails on z/VM machines on s390.
> >
> > The failure is causes by event cycles. This event is not available
> > on virtualized machines like z/VM on s390.
> > Change to software event cpu-clock to fix this.
> >
> >     Output before:
> >       # ./perf test 78
> >       79: perf evlist tests              : FAILED!
> >       #
> >
> >     Output after:
> >       # ./perf test 78
> >       79: perf evlist tests              : Ok
> >       #
> >
> > Fixes: b04d2b919912 ("perf test: Fix test case perf evlist tests for s390x")
> > Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
> > Tested-by: Jan Polensky <japo@linux.ibm.com>
> > Reviewed-by: Jan Polensky <japo@linux.ibm.com>
> > Cc: Ian Rogers <irogers@google.com>

> Reviewed-by: Ian Rogers <irogers@google.com>

Thanks, applied to perf-tools-next,

- Arnaldo