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authorThomas Richter <tmricht@linux.vnet.ibm.com>2017-11-23 12:46:11 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-11-28 14:28:26 -0300
commit996548499df61babae5306544c7daf5fd39db31c (patch)
tree388286f7e6c7b139b16c42c9b95ac630637caee5
parent321a7c35c90cc834851ceda18a8ee18f1d032b92 (diff)
downloadlinux-996548499df61babae5306544c7daf5fd39db31c.tar.bz2
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>
-rw-r--r--tools/perf/tests/task-exit.c4
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;