Messages in this thread | | | Date | Fri, 18 Apr 2014 09:55:25 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 0/3] perf tools: Speedup DWARF unwind |
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* Ingo Molnar <mingo@kernel.org> wrote:
> > * Jiri Olsa <jolsa@redhat.com> wrote: > > > hi, > > trying to speedup DWARF unwind report code by factoring > > related code: > > - caching sample's registers access > > - keep dso data file descriptor open for the > > life of the dso object > > - replace dso cache code by mapping dso data file > > directly for the life of the dso object > > > > The speedup is mainly for libunwind unwind. The libdw will benefit > > mainly from cached registers access, because it handles dso data > > accesses by itself.. and anyway it's still faster ;-). > > Just curious: do you have any numbers about how much faster it got in > practice?
Oh, the numbers are all in the changelogs, never mind!
So in your test workload it went from 54.6 seconds to 36.7, a 48% speedup :-)
Thanks,
Ingo
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