Hi Jean, On Fri, 26 Sep 2014 09:14:41 +0200, Jean Pihet wrote: > Hi, > > On 26 September 2014 07:50, Namhyung Kim <namhy...@kernel.org> wrote: >> Hi Jean, >> >> On Wed, 24 Sep 2014 15:45:57 +0200, Jean Pihet wrote: >>> Hi! >>> >>> Here are the test results on ARMv7 for the 2 patches. The speedup is >>> about x2.1 for identical unwinding output data. >>> >>> 'perf record --call-graph dwarf -- stress --cpu 2 --io 2 --vm 2 >>> --timeout 10s' generates a 365 MB perf.data file. >>> >>> time perf.orig report --sort symbol --call-graph --stdio 2&>1 > /dev/null >>> average on 3 runs >>> real 36.736 >>> user 14.79 >>> sys 21.91 >>> >>> time perf.libunwind.speedup report --sort symbol --call-graph --stdio >>> 2&>1 > /dev/null >>> average on 3 runs >>> real 17.41 x2.11 >>> user 6.42 x2.3 >>> sys 10.97 x2 >>> >>> So the patches definitely speedup the unwinding. >>> FWIW: Acked-by: Jean Pihet <jean.pi...@linaro.org> >> >> Thanks for your test! >> >> Btw, have you checked the difference of the output before and after the >> caching? > Yes the output is identical (as stated here above).
Ah, I misunderstood it. Thanks for your confirmation. :) Thanks, Namhyung -- 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/
