On Fri, Apr 18, 2014 at 09:55:25AM +0200, Ingo Molnar wrote: > > * Ingo Molnar <mi...@kernel.org> wrote: > > > > > * Jiri Olsa <jo...@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 :-) >
yep, I should have put it in here as well.. also the current libdw unwind time on this workload is 26 seconds.. 10 more seconds to go ;-) jirka -- 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/
