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| author | Thomas Richter <tmricht@linux.vnet.ibm.com> | 2017-11-23 12:46:11 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-11-28 14:28:26 -0300 |
| commit | 996548499df61babae5306544c7daf5fd39db31c (patch) | |
| tree | 388286f7e6c7b139b16c42c9b95ac630637caee5 /tools/perf | |
| parent | 321a7c35c90cc834851ceda18a8ee18f1d032b92 (diff) | |
| download | linux-996548499df61babae5306544c7daf5fd39db31c.tar.gz linux-996548499df61babae5306544c7daf5fd39db31c.tar.bz2 linux-996548499df61babae5306544c7daf5fd39db31c.zip | |
perf test: Fix test 21 for s390x
Test case 21 (Number of exit events of a simple workload) fails on
s390x. The reason is the invalid sample frequency supplied for this
test. On s390x the minimum sample frequency is much higher (see output
of /proc/service_levels).
Supply a save sample frequency value for s390x to fix this. The value
will be adjusted by the s390x CPUMF frequency convertion function to a
value well below the sysctl kernel.perf_event_max_sample_rate value.
Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
LPU-Reference: 20171123114611.93397-1-tmricht@linux.vnet.ibm.com
Link: https://lkml.kernel.org/n/tip-1ynblyhi1n81idpido59nt1y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/tests/task-exit.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c index bc4a7344e274..89c8e1604ca7 100644 --- a/tools/perf/tests/task-exit.c +++ b/tools/perf/tests/task-exit.c @@ -84,7 +84,11 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused evsel = perf_evlist__first(evlist); evsel->attr.task = 1; +#ifdef __s390x__ + evsel->attr.sample_freq = 1000000; +#else evsel->attr.sample_freq = 1; +#endif evsel->attr.inherit = 0; evsel->attr.watermark = 0; evsel->attr.wakeup_events = 1; |