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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-07 16:51:58 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-07 16:51:58 -0300 |
| commit | 239849dde350c9f7356974ca4f62171f50a2c86e (patch) | |
| tree | aa84ef9498905b4669681e86dd411cbc55bdf216 /tools/perf | |
| parent | 372b212263998ae8e3b2f80ce52af3168d749158 (diff) | |
| download | linux-239849dde350c9f7356974ca4f62171f50a2c86e.tar.gz linux-239849dde350c9f7356974ca4f62171f50a2c86e.tar.bz2 linux-239849dde350c9f7356974ca4f62171f50a2c86e.zip | |
perf tests: No need to set attr.sample_freq for tracking !PERF_RECORD_SAMPLE
We were asking for a 4kHz sample_freq, making the test fail needlessly
when the system reduced /proc/sys/kernel/perf_event_max_sample_rate
below that.
Before:
# perf test -vv dummy
23: Test using a dummy software event to keep tracking :
--- start ---
test child forked, pid 32421
------------------------------------------------------------
perf_event_attr:
type 1
size 112
config 0x9
{ sample_period, sample_freq } 4000
sample_type IP|TID|ID|PERIOD
<SNIP>
sys_perf_event_open failed, error -22
Unable to open dummy and cycles event
test child finished with -2
---- end ----
Test using a dummy software event to keep tracking: Skip
#
[root@zoo ~]# cat /proc/sys/kernel/perf_event_max_sample_rate
1000
After:
[root@zoo ~]# perf test dummy
23: Test using a dummy software event to keep tracking : Ok
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-487iquegrs2379e5n0pi0tcp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/tests/keep-tracking.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c index a337a6da1f39..615813278334 100644 --- a/tools/perf/tests/keep-tracking.c +++ b/tools/perf/tests/keep-tracking.c @@ -55,7 +55,6 @@ int test__keep_tracking(int subtest __maybe_unused) .mmap_pages = UINT_MAX, .user_freq = UINT_MAX, .user_interval = ULLONG_MAX, - .freq = 4000, .target = { .uses_mmap = true, }, |