From: "Shi, Yang" <yang.shi@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>
Cc: linux-rt-users@vger.kernel.org
Subject: -rt kernel just can show 8 perf events?
Date: Tue, 01 Dec 2015 12:36:37 -0800 [thread overview]
Message-ID: <565E04D5.4000202@linaro.org> (raw)
Hi folks,
I'm running some perf program on my x86-64 machine with 4.1.12-rt13
kernel, but I found just 8 perf events can be showed up with "perf stat
-e" on -rt kernel, but mainline kernel is fine.
I traced 14 events (tried different number in my test, always > 8), then
I got:
29692 cs
104 page-faults
104 minor-faults
0 major-faults
100122071 iTLB-load-misses
447793 dTLB-load-misses
13655 dTLB-store-misses
201620583 branch-misses
<not counted> cache-misses (0.00%)
<not counted> cycles (0.00%)
<not counted> dtlb_misses_walk_duration (0.00%)
<not counted> dtlb_misses_walk_completed (0.00%)
<not counted> itlb_misses_walk_duration (0.00%)
<not counted> itlb_misses_walk_completed (0.00%)
No matter how many events are traced, just 8 events are showed with
meaningful data, all others are showed up as "not counted".
Any hint is appreciated.
Regards,
Yang
next reply other threads:[~2015-12-01 20:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-01 20:36 Shi, Yang [this message]
2015-12-11 17:36 ` -rt kernel just can show 8 perf events? Sebastian Andrzej Siewior
2015-12-11 17:57 ` Shi, Yang
2016-02-04 15:16 ` Sebastian Andrzej Siewior
2016-02-04 23:41 ` Shi, Yang
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