linux-kernel - Re: [PATCH 0/4] perf tools: New comm infrastructure

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Date:	Wed, 18 Sep 2013 12:58:55 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 0/4] perf tools: New comm infrastructure

Em Wed, Sep 18, 2013 at 12:12:53PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Sep 18, 2013 at 11:20:38AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Sep 17, 2013 at 02:54:22PM +0900, Namhyung Kim escreveu:
> > > On Sat, 14 Sep 2013 08:11:49 +0200, Ingo Molnar wrote:
> > > > Well, it was the 100,000+ step linear list walk that was causing 90% of 
> > > > the slowness here. Namhyung's patch should dramatically improve that. I 
> > > > guess time for someone to post a combined tree so that it can be tested 
> > > > all together?
 
> Cherry picking just:
> 
>     perf callchain: Convert children list to rbtree
> 
> I go from too-long-to-wait to:
> 
> [root@...dy ~]# echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
> [acme@...dy linux]$ taskset -c 3 perf stat --null --sync --repeat 3 perf report -i perf.data.make-j8-kernel > /dev/null
 
>  Performance counter stats for 'perf report -i perf.data.make-j8-kernel' (3 runs):
>       79.158464654 seconds time elapsed                                          ( +-  0.15% )
 
> [acme@...dy linux]$
> [acme@...dy linux]$ ls -lah perf.data.make-j8-kernel 
> -rw-------. 1 acme acme 2.3G Sep 16 11:56 perf.data.make-j8-kernel

And with the others, fixed up to cope with PERF_RECORD_MMAP2, except the
progress bar updating:

[acme@...dy linux]$ taskset -c 3 perf stat --null --sync --repeat 3 perf report -i perf.data.make-j8-kernel > /dev/null

 Performance counter stats for 'perf report -i perf.data.make-j8-kernel' (3 runs):

      55.697701530 seconds time elapsed                                          ( +-  0.13% )

[acme@...dy linux]$

Branch perf/callchain-v4 on my tree.

- Arnaldo
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