[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1452276186-15202-38-git-send-email-acme@kernel.org>
Date: Fri, 8 Jan 2016 15:02:44 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>,
David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Wang Nan <wangnan0@...wei.com>
Subject: [PATCH 37/59] perf tests: No need to set attr.sample_freq for tracking !PERF_RECORD_SAMPLE
From: Arnaldo Carvalho de Melo <acme@...hat.com>
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@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/n/tip-487iquegrs2379e5n0pi0tcp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/tests/keep-tracking.c | 1 -
1 file changed, 1 deletion(-)
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,
},
--
2.1.0
Powered by blists - more mailing lists