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authorThomas Richter <tmricht@linux.ibm.com>2022-04-20 09:29:21 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-04-23 00:39:34 +0300
commit5bb017d4b97a0f135f43ef77091b7edcce4dcee6 (patch)
tree3f98a2a8cf7020dc7e8f92d452686438fbda643d /tools
parentccb17caecfbd542f49a2a79ae088136ba8bfb794 (diff)
downloadlinux-5bb017d4b97a0f135f43ef77091b7edcce4dcee6.tar.xz
perf test: Fix error message for test case 71 on s390, where it is not supported
Test case 71 'Convert perf time to TSC' is not supported on s390. Subtest 71.1 is skipped with the correct message, but subtest 71.2 is not skipped and fails. The root cause is function evlist__open() called from test__perf_time_to_tsc(). evlist__open() returns -ENOENT because the event cycles:u is not supported by the selected PMU, for example platform s390 on z/VM or an x86_64 virtual machine. The PMU driver returns -ENOENT in this case. This error is leads to the failure. Fix this by returning TEST_SKIP on -ENOENT. Output before: 71: Convert perf time to TSC: 71.1: TSC support: Skip (This architecture does not support) 71.2: Perf time to TSC: FAILED! Output after: 71: Convert perf time to TSC: 71.1: TSC support: Skip (This architecture does not support) 71.2: Perf time to TSC: Skip (perf_read_tsc_conversion is not supported) This also happens on an x86_64 virtual machine: # uname -m x86_64 $ ./perf test -F 71 71: Convert perf time to TSC : 71.1: TSC support : Ok 71.2: Perf time to TSC : FAILED! $ Committer testing: Continues to work on x86_64: $ perf test 71 71: Convert perf time to TSC : 71.1: TSC support : Ok 71.2: Perf time to TSC : Ok $ Fixes: 290fa68bdc458863 ("perf test tsc: Fix error message when not supported") Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Chengdong Li <chengdongli@tencent.com> Cc: chengdongli@tencent.com Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: https://lore.kernel.org/r/20220420062921.1211825-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/tests/perf-time-to-tsc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c
index cc6df49a65a1..4ad0dfbc8b21 100644
--- a/tools/perf/tests/perf-time-to-tsc.c
+++ b/tools/perf/tests/perf-time-to-tsc.c
@@ -123,6 +123,10 @@ static int test__perf_time_to_tsc(struct test_suite *test __maybe_unused, int su
evsel->core.attr.enable_on_exec = 0;
}
+ if (evlist__open(evlist) == -ENOENT) {
+ err = TEST_SKIP;
+ goto out_err;
+ }
CHECK__(evlist__open(evlist));
CHECK__(evlist__mmap(evlist, UINT_MAX));