From: Mike Galbraith <bitbucket@online.de>
To: Stephane Eranian <eranian@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: perf: perf sched lat segfault - bisected
Date: Tue, 08 Oct 2013 12:20:59 +0200 [thread overview]
Message-ID: <1381227659.15686.11.camel@marge.simpson.net> (raw)
In-Reply-To: <1381227252.15686.9.camel@marge.simpson.net>
On Tue, 2013-10-08 at 12:14 +0200, Mike Galbraith wrote:
> On Tue, 2013-10-08 at 11:23 +0200, Stephane Eranian wrote:
> > On Tue, Oct 8, 2013 at 10:41 AM, Mike Galbraith <bitbucket@online.de> wrote:
> > > Box: Q6600
> > >
> > > Reproducer:
> > > perf sched record -- sleep 1
> > > perf sched lat (boom)
> > >
> > I don't understand the test case here.
> > If I do this, perf sched lat complains of no trace records
> > and no kernel crash. Could you provide the full cmdline?
>
> Hm. That was it, just like so.
>
> marge:/usr/local/src/kernel/linux-3.x.git/tools/perf # ./perf sched record -- sleep 1
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.763 MB perf.data (~33348 samples) ]
> marge:/usr/local/src/kernel/linux-3.x.git/tools/perf # ./perf sched lat
> Segmentation fault
> marge:/usr/local/src/kernel/linux-3.x.git/tools/perf #
commit 72f3bdf7fd1003373b454bf923d3a196bbc36600
Author: Mike Galbraith <mgalbraith@suse.de>
Date: Tue Oct 8 12:18:37 2013 +0200
Revert "perf tools: Add attr->mmap2 support"
This reverts commit 5c5e854bc760a2e2c878df3cfcf2afa4febcd511.
commit a8af8531d08d3edb37a7d67d1a4dc2e1f2f4da58
Author: Mike Galbraith <mgalbraith@suse.de>
Date: Tue Oct 8 12:18:23 2013 +0200
Revert "perf trace: Add mmap2 handler"
This reverts commit 384c671e33a7ddf905f2c60b433b9883f0e5a605.
marge:/usr/local/src/kernel/linux-3.x.git/tools/perf # ./perf sched
record -- sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.647 MB perf.data (~28289 samples) ]
marge:/usr/local/src/kernel/linux-3.x.git/tools/perf # perf sched lat
marge:/usr/local/src/kernel/linux-3.x.git/tools/perf #
(emitted this)
---------------------------------------------------------------------------------------------------------------
Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |
---------------------------------------------------------------------------------------------------------------
kworker/3:2:383 | 0.073 ms | 1 | avg: 0.020 ms | max: 0.020 ms | max at: 7197.856052 s
sleep:24717 | 1.163 ms | 3 | avg: 0.011 ms | max: 0.022 ms | max at: 7196.884445 s
kworker/2:1:36 | 0.097 ms | 1 | avg: 0.007 ms | max: 0.007 ms | max at: 7197.796023 s
haveged:3547 | 0.023 ms | 2 | avg: 0.006 ms | max: 0.009 ms | max at: 7197.796345 s
rcu_sched:9 | 0.126 ms | 14 | avg: 0.006 ms | max: 0.021 ms | max at: 7196.897051 s
ntpd:4185 | 0.034 ms | 1 | avg: 0.004 ms | max: 0.004 ms | max at: 7197.746409 s
kded4:4594 | 0.058 ms | 1 | avg: 0.004 ms | max: 0.004 ms | max at: 7197.422130 s
evolution:15686 | 0.065 ms | 1 | avg: 0.004 ms | max: 0.004 ms | max at: 7196.915715 s
pickup:21579 | 0.062 ms | 1 | avg: 0.004 ms | max: 0.004 ms | max at: 7197.329185 s
JS Watchdog:20053 | 0.020 ms | 1 | avg: 0.004 ms | max: 0.004 ms | max at: 7197.623752 s
perf:24716 | 3.330 ms | 1 | avg: 0.004 ms | max: 0.004 ms | max at: 7197.885690 s
plasma-desktop:4685 | 1.632 ms | 2 | avg: 0.004 ms | max: 0.005 ms | max at: 7196.933762 s
master:4307 | 0.104 ms | 2 | avg: 0.004 ms | max: 0.005 ms | max at: 7197.329136 s
Xorg:4331 | 0.485 ms | 4 | avg: 0.003 ms | max: 0.005 ms | max at: 7197.010801 s
ksoftirqd/2:18 | 0.014 ms | 1 | avg: 0.003 ms | max: 0.003 ms | max at: 7196.897039 s
alsa-sink:5282 | 0.000 ms | 200 | avg: 0.003 ms | max: 0.003 ms | max at: 7196.905149 s
migration/3:22 | 0.000 ms | 1 | avg: 0.002 ms | max: 0.002 ms | max at: 7196.884423 s
-----------------------------------------------------------------------------------------
TOTAL: | 7.285 ms | 237 |
---------------------------------------------------
next prev parent reply other threads:[~2013-10-08 10:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-08 8:41 perf: perf sched lat segfault - bisected Mike Galbraith
2013-10-08 9:23 ` Stephane Eranian
2013-10-08 10:14 ` Mike Galbraith
2013-10-08 10:20 ` Mike Galbraith [this message]
2013-10-08 10:25 ` Stephane Eranian
2013-10-08 10:36 ` Stephane Eranian
2013-10-08 10:50 ` Mike Galbraith
2013-10-08 10:51 ` Stephane Eranian
2013-10-08 10:56 ` Mike Galbraith
2013-10-08 10:57 ` Stephane Eranian
2013-10-08 10:41 ` Mike Galbraith
2013-10-08 12:17 ` Arnaldo Carvalho de Melo
2013-10-08 12:27 ` Mike Galbraith
2013-10-08 12:35 ` Mike Galbraith
2013-10-08 13:20 ` David Ahern
2013-10-08 13:44 ` Mike Galbraith
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1381227659.15686.11.camel@marge.simpson.net \
--to=bitbucket@online.de \
--cc=acme@redhat.com \
--cc=eranian@google.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox