From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Alexis Berlemont <alexis.berlemont@gmail.com>,
linux-kernel@vger.kernel.org, mingo@redhat.com,
alexander.shishkin@linux.intel.com
Subject: Re: [PATCH 0/2] perf: measure page fault duration in perf trace
Date: Wed, 26 Oct 2016 16:47:06 -0200 [thread overview]
Message-ID: <20161026184706.GB4704@kernel.org> (raw)
In-Reply-To: <20161026084618.GY3102@twins.programming.kicks-ass.net>
Em Wed, Oct 26, 2016 at 10:46:18AM +0200, Peter Zijlstra escreveu:
> On Wed, Oct 26, 2016 at 01:51:58AM +0200, Alexis Berlemont wrote:
> > Hi,
> >
> > Here are 2 small patches which try to fulfill a point in the perf todo
> > list:
>
> There's a todo list?
https://perf.wiki.kernel.org/index.php/Todo
> > * Forward port the page fault tracepoints and use it in 'trace'.
> > http://git.kernel.org/?p=linux/kernel/git/acme/linux.git;a=commitdiff;h=d53b11976093b6d8afeb8181db53aaffc754920d;hp=32ba4abf60ae1b710d22a75725491815de649bc5
>
> dead link
I guess this is the one:
http://git.kernel.org/cgit/linux/kernel/git/acme/linux.git/commit/?id=eea86c6e06c241667c96c8e87e43c0870e1d6285
author Frederic Weisbecker <fweisbec@gmail.com> 2010-11-12 04:35:06 (GMT)
committer Ingo Molnar <mingo@elte.hu> 2011-05-07 16:10:43 (GMT)
commit eea86c6e06c241667c96c8e87e43c0870e1d6285 (patch)
tree b00ce7ef9a6219f4df6b0e1ffe453d2d5baf3593
parent 57d524154ffe99d27fb55e0e30ddbad9f4c35806 (diff)
perf, mm: Add fault tracing
Part of that are two modified patches from Jiri Olsa who added the fault
tracepoints. I had to split them in two tracepoints so that we get the
faults
handling duration.
Originally-from: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
--------------------
After that entry was added to the todo we got --pf, but no duration:
[root@jouet ~]# perf trace --pf maj --no-syscalls
0.000 ( 0.000 ms): perf/20412 majfault [__memcmp_sse4_1+0xbc6] => 0x7f1e0010c000 (?.)
1.156 ( 0.000 ms): perf/20412 majfault [__memcmp_sse4_1+0xbc6] => /usr/bin/mv@0x0 (d.)
56.907 ( 0.000 ms): perf/20412 majfault [__memcpy_avx_unaligned+0x1e7] => /usr/bin/mv@0x207a0 (d.)
57.683 ( 0.000 ms): perf/20412 majfault [__memcmp_sse4_1+0xbc6] => /usr/lib/debug/usr/bin/mv.debug@0x0 (d.)
60.916 ( 0.000 ms): perf/20412 majfault [__memcpy_avx_unaligned+0x2b6] => /usr/lib/debug/usr/bin/mv.debug@0x6ace0 (d.)
18446744073708.766 ( 0.000 ms): systemd-journa/578 majfault [0x14972] => 0x7f25bdd9ebd0 (?.)
70.193 ( 0.000 ms): perf/20412 majfault [__memcmp_sse4_1+0xbc6] => /usr/lib/debug/usr/lib/systemd/systemd-journald.debug@0x0 (d.)
71.176 ( 0.000 ms): perf/20412 majfault [__memcpy_avx_unaligned+0x2b6] => /usr/lib/debug/usr/lib/systemd/systemd-journald.debug@0x1221e0 (d.)
^C[root@jouet ~]# trace -h --pf
Usage: perf trace [<options>] [<command>]
or: perf trace [<options>] -- <command> [<options>]
or: perf trace record [<options>] [<command>]
or: perf trace record [<options>] -- <command> [<options>]
-F, --pf <all|maj|min>
Trace pagefaults
[root@jouet ~]#
prev parent reply other threads:[~2016-10-26 18:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-25 23:51 [PATCH 0/2] perf: measure page fault duration in perf trace Alexis Berlemont
2016-10-25 23:51 ` [PATCH 1/2] perf, x86-mm: Add exit-fault tracing Alexis Berlemont
2016-10-26 8:51 ` Peter Zijlstra
2016-10-26 18:53 ` Arnaldo Carvalho de Melo
2016-10-27 8:37 ` Peter Zijlstra
2016-10-27 23:31 ` [PATCH v2] perf, x86-mm: declare page-faults tracepoints like irq-vectors ones Alexis Berlemont
2016-10-27 23:31 ` Alexis Berlemont
2016-11-18 0:21 ` [PATCH v3 0/2] perf: measure page fault duration in perf trace Alexis Berlemont
2016-12-05 23:40 ` Alexis Berlemont
2016-12-06 14:46 ` Arnaldo Carvalho de Melo
2016-11-18 0:21 ` [PATCH v3 1/2] perf, x86-mm: declare page-faults tracepoints like irq-vectors ones Alexis Berlemont
2016-11-18 0:21 ` [PATCH v3 2/2] perf: add page fault duration measures in perf trace Alexis Berlemont
2016-10-27 8:38 ` [PATCH 1/2] perf, x86-mm: Add exit-fault tracing Peter Zijlstra
2016-10-25 23:52 ` [PATCH 2/2] perf: add page fault duration measures in perf trace Alexis Berlemont
2016-10-26 8:46 ` [PATCH 0/2] perf: measure page fault duration " Peter Zijlstra
2016-10-26 18:47 ` Arnaldo Carvalho de Melo [this message]
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