Re: [PATCH 1/3] perf callchain: Convert children list to rbtree

[Jiri Olsa]

On Tue, Sep 10, 2013 at 05:24:16PM +0900, Namhyung Kim wrote:
> From: Namhyung Kim <namhyung.kim@xxxxxxx>
> 
> Current collapse stage has a scalability problem which can be
> reproduced easily with parallel kernel build.  This is because it
> needs to traverse every children of callchain linearly during the
> collapse/merge stage.  Convert it to rbtree reduced the overhead
> significantly.
> 
> On my 400MB perf.data file which recorded with make -j32 kernel build:


nice!!!

tried on 2.6 GB data file from kernel make -j64 and got
report speed up from 'never' to 2m52.756s ;-)

jirka
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