* Jiri Olsa <jo...@redhat.com> wrote:
> On Tue, Sep 10, 2013 at 05:24:16PM +0900, Namhyung Kim wrote:
> > From: Namhyung Kim <namhyung....@lge.com>
> >
> > 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!!!
Nice indeed!
> tried on 2.6 GB data file from kernel make -j64 and got report speed up
> from 'never' to 2m52.756s ;-)
It's still rather long though, unacceptable for everyday usage :-/
Frederic thought that we could reduce minimize collapsing to begin with.
Frederic, could you outline that in more detail please?
Thanks,
Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
