mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-23 09:56:00 +00:00
perf tests: No need to set attr.sample_freq in the perf time to TSC test
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. In this test we only look at the PERF_SAMPLE_TIME fields in PERF_RECORD_ meta events, no need to set sample_freq. Thanks to Namhyung for suggesting that max_sample_rate could be the reason for the test failure, seeing the 'perf test -vv' output I sent. Before: # echo 1000 > /proc/sys/kernel/perf_event_max_sample_rate # perf test TSC 45: Test converting perf time to TSC : FAILED! After: # perf test TSC 45: Test converting perf time to TSC : Ok # cat /proc/sys/kernel/perf_event_max_sample_rate 1000 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: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-lcob05qhawkuvsyuu9g1fld5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
84530920de
commit
4f4ba0e6af
@ -41,7 +41,6 @@ int test__perf_time_to_tsc(int subtest __maybe_unused)
|
||||
.mmap_pages = UINT_MAX,
|
||||
.user_freq = UINT_MAX,
|
||||
.user_interval = ULLONG_MAX,
|
||||
.freq = 4000,
|
||||
.target = {
|
||||
.uses_mmap = true,
|
||||
},
|
||||
|
Loading…
Reference in New Issue
Block a user