* [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x
@ 2026-01-26 10:18 Thomas Richter
2026-01-26 17:42 ` Ian Rogers
0 siblings, 1 reply; 3+ messages in thread
From: Thomas Richter @ 2026-01-26 10:18 UTC (permalink / raw)
To: linux-kernel, linux-s390, linux-perf-users, acme, namhyung,
irogers
Cc: agordeev, gor, sumanthk, hca, japo, Thomas Richter
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
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x
2026-01-26 10:18 [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x Thomas Richter
@ 2026-01-26 17:42 ` Ian Rogers
2026-01-26 20:34 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 3+ messages in thread
From: Ian Rogers @ 2026-01-26 17:42 UTC (permalink / raw)
To: Thomas Richter
Cc: linux-kernel, linux-s390, linux-perf-users, acme, namhyung,
agordeev, gor, sumanthk, hca, japo
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
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x
2026-01-26 17:42 ` Ian Rogers
@ 2026-01-26 20:34 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 3+ messages in thread
From: Arnaldo Carvalho de Melo @ 2026-01-26 20:34 UTC (permalink / raw)
To: Ian Rogers
Cc: Thomas Richter, linux-kernel, linux-s390, linux-perf-users,
namhyung, agordeev, gor, sumanthk, hca, japo
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
^ permalink raw reply [flat|nested] 3+ messages in thread
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2026-01-26 10:18 [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x Thomas Richter
2026-01-26 17:42 ` Ian Rogers
2026-01-26 20:34 ` Arnaldo Carvalho de Melo
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