From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Ingo Molnar <mingo@elte.hu>
Cc: Li Zefan <lizf@cn.fujitsu.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Peter Zijlstra <peterz@infradead.org>,
Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
LKML <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool
Date: Fri, 20 Nov 2009 10:47:32 +0200 [thread overview]
Message-ID: <4B0657A4.2040606@cs.helsinki.fi> (raw)
In-Reply-To: <20091120083053.GB19778@elte.hu>
Ingo Molnar kirjoitti:
> Regarding patch 2 - can we set some definitive benchmark threshold for
> that? I.e. a list of must-have features in 'perf kmem' before we can do
> it? 100% information and analysis equivalency with kmemtrace-user tool?
I'd be interested to hear Eduard's comment on that.
That said, I'll try to find some time to test "perf kmem" and provide
feedback on that. I can ACK the patch when I'm happy with the output. :-)
I'm mostly interested in two scenarios: (1) getting a nice report on
worst fragmented call-sites (perf kmem needs symbol lookup) and (2)
doing "perf kmem record" on machine A (think embedded here) and then
"perf kmem report" on machine B. I haven't tried kmemtrace-user for a
while but it did support both of them quite nicely at some point.
Pekka
WARNING: multiple messages have this Message-ID (diff)
From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Ingo Molnar <mingo@elte.hu>
Cc: Li Zefan <lizf@cn.fujitsu.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Peter Zijlstra <peterz@infradead.org>,
Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
LKML <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool
Date: Fri, 20 Nov 2009 10:47:32 +0200 [thread overview]
Message-ID: <4B0657A4.2040606@cs.helsinki.fi> (raw)
In-Reply-To: <20091120083053.GB19778@elte.hu>
Ingo Molnar kirjoitti:
> Regarding patch 2 - can we set some definitive benchmark threshold for
> that? I.e. a list of must-have features in 'perf kmem' before we can do
> it? 100% information and analysis equivalency with kmemtrace-user tool?
I'd be interested to hear Eduard's comment on that.
That said, I'll try to find some time to test "perf kmem" and provide
feedback on that. I can ACK the patch when I'm happy with the output. :-)
I'm mostly interested in two scenarios: (1) getting a nice report on
worst fragmented call-sites (perf kmem needs symbol lookup) and (2)
doing "perf kmem record" on machine A (think embedded here) and then
"perf kmem report" on machine B. I haven't tried kmemtrace-user for a
while but it did support both of them quite nicely at some point.
Pekka
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next prev parent reply other threads:[~2009-11-20 8:47 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-20 7:53 [RFC][PATCH 1/2] perf: Add 'perf kmem' tool Li Zefan
2009-11-20 7:53 ` Li Zefan
2009-11-20 7:53 ` [PATCH 2/2] tracing: Remove kmemtrace tracer Li Zefan
2009-11-20 7:53 ` Li Zefan
2009-11-20 8:20 ` Pekka Enberg
2009-11-20 8:20 ` Pekka Enberg
2009-11-20 8:24 ` Li Zefan
2009-11-20 8:24 ` Li Zefan
2009-11-20 8:27 ` Pekka Enberg
2009-11-20 8:27 ` Pekka Enberg
2009-11-20 8:31 ` Li Zefan
2009-11-20 8:31 ` Li Zefan
2009-11-20 8:14 ` [RFC][PATCH 1/2] perf: Add 'perf kmem' tool Ingo Molnar
2009-11-20 8:14 ` Ingo Molnar
2009-11-20 8:19 ` Pekka Enberg
2009-11-20 8:19 ` Pekka Enberg
2009-11-20 8:30 ` Ingo Molnar
2009-11-20 8:30 ` Ingo Molnar
2009-11-20 8:47 ` Pekka Enberg [this message]
2009-11-20 8:47 ` Pekka Enberg
2009-11-20 8:53 ` Li Zefan
2009-11-20 8:53 ` Li Zefan
2009-11-20 9:03 ` Ingo Molnar
2009-11-20 9:03 ` Ingo Molnar
2009-11-20 9:14 ` Li Zefan
2009-11-20 9:14 ` Li Zefan
2009-11-20 14:42 ` Arnaldo Carvalho de Melo
2009-11-20 14:42 ` Arnaldo Carvalho de Melo
2009-11-20 16:41 ` Ingo Molnar
2009-11-20 16:41 ` Ingo Molnar
2009-11-20 17:52 ` Arnaldo Carvalho de Melo
2009-11-20 17:52 ` Arnaldo Carvalho de Melo
2009-11-23 6:51 ` Ingo Molnar
2009-11-23 6:51 ` Ingo Molnar
2009-11-23 7:22 ` Peter Zijlstra
2009-11-23 7:22 ` Peter Zijlstra
2009-11-23 7:33 ` Ingo Molnar
2009-11-23 7:33 ` Ingo Molnar
2009-11-23 14:37 ` Arnaldo Carvalho de Melo
2009-11-23 14:37 ` Arnaldo Carvalho de Melo
2009-11-23 14:32 ` Arnaldo Carvalho de Melo
2009-11-23 14:32 ` Arnaldo Carvalho de Melo
2009-11-20 9:01 ` Ingo Molnar
2009-11-20 9:01 ` Ingo Molnar
2009-11-20 9:15 ` Pekka Enberg
2009-11-20 9:15 ` Pekka Enberg
2009-11-20 10:13 ` Ingo Molnar
2009-11-20 10:13 ` Ingo Molnar
2009-11-20 10:31 ` Pekka Enberg
2009-11-20 10:31 ` Pekka Enberg
2009-11-20 10:49 ` Ingo Molnar
2009-11-20 10:49 ` Ingo Molnar
2009-11-23 14:46 ` Steven Rostedt
2009-11-23 14:46 ` Steven Rostedt
2009-11-23 17:53 ` Ingo Molnar
2009-11-23 17:53 ` Ingo Molnar
2009-11-20 8:20 ` Li Zefan
2009-11-20 8:20 ` Li Zefan
2009-11-20 8:54 ` [tip:perf/core] " tip-bot for Li Zefan
2009-11-20 8:54 ` tip-bot for Li Zefan
2009-11-20 8:55 ` [RFC][PATCH 1/2] " Ingo Molnar
2009-11-20 8:55 ` Ingo Molnar
2009-11-20 9:11 ` Li Zefan
2009-11-20 9:11 ` Li Zefan
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