linux-kernel - Re: [PATCH] perf report: Add a simple GTK2-based 'perf report' browser

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Date:	Thu, 23 Feb 2012 19:10:48 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] perf report: Add a simple GTK2-based 'perf report' browser

On Thu, Feb 23, 2012 at 6:53 PM, Arnaldo Carvalho de Melo
<acme@...stprotocols.net> wrote:
> Em Thu, Feb 23, 2012 at 02:47:39PM -0200, Arnaldo Carvalho de Melo escreveu:
>> Em Thu, Feb 23, 2012 at 06:45:04PM +0200, Pekka Enberg escreveu:
>> > On Thu, 2012-02-23 at 14:39 -0200, Arnaldo Carvalho de Melo wrote:
>> > > > Dunno, probably. Does that matter, though? It's pretty damn fast as-is.
>> > >
>> > > Well, what kinds of perf.data file are you feeding it?
>> >
>> > It's a real-world case where I'm profiling JRuby startup under Jato with
>> > perf:
>> >
>> > penberg@...uar:~/src/jato$ ls -lh perf.data
>> > -rw------- 1 penberg penberg 453K 2012-02-23 18:06 perf.data
>> >
>> > On Thu, 2012-02-23 at 14:39 -0200, Arnaldo Carvalho de Melo wrote:
>> > > I'm testing it now with large ones, lets see.
>> >
>> > How big files are we talking about here?
>>
>> 5 MB ones, say.
>
> Nah:
>
> [root@...icio linux]# perf record -a -F 10000 sleep 5m
> [ perf record: Woken up 166 times to write data ]
> [ perf record: Captured and wrote 42.104 MB perf.data (~1839573 samples)
> ]
> [root@...icio linux]#
> [root@...icio linux]#
> [root@...icio linux]# perf report --gtk
>
>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 10618 root      20   0  408m 170m  49m S  0.0  2.2   0:04.71 perf
>
> [root@...icio linux]# perf report --tui
>
> 10633 root      20   0  379m 165m  45m S  0.0  2.1   0:01.15 perf

Sorry, I don't understand how to interpret your numbers.

I used the same "perf record" command here which generated a 26 MB
perf.data file. "perf report --gtk" starts up almost instantly here.

                                Pekka
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