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@sandy ~]# echo performance >
> /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
> [acme@sandy 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@sandy linux]$
> [acme@sandy 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@sandy 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@sandy linux]$
Branch perf/callchain-v4 on my tree.
- Arnaldo
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