Am 21.08.2015 um 17:47 schrieb Richard Henderson:
On 08/20/2015 11:05 PM, Dennis Luehring wrote:
>> > g++ src/pugixml.cpp -g -Wall -Wextra -Werror -pedantic -std=c++0x -c -MMD
-MP
>> >
>> > tcg-indirect: ~2:46.5
>> > qemu.org-git: ~2:51.2 (worst result)
>> > without-optimization: ~2:14.1 (best result)
>>
>> No compiler optimization? I wouldn't expect there to be much for tcg to
>> optimize there -- dropping values to memory all the time doesn't leave much.
>
>
> without-optimization means qemu.org-git release build + undefine
> USE_TCG_OPTIMIZATIONS in tcg/tcg.c
> or what compiler do you mean?
The one for compiling the benchmark: g++ -O2.
for the overall speed comparision it is not relevant if its -O0, -O2 or -O3
as long as all my test using always the same optimization
>> These results are weird. Unoptimized less than half the speed of mainline?
>> Improving optimization (with no extra work, mind) brings the results back
down?
>
>
> yep they are - it seems that the assumption of the involved developers
> where speed can be improved / or slowbess comes from is not correct
> how are SPARC64 benchmarks done usually?
*shrug* No different than any other..
so what benchmarks are in use?
are there any download/compile/installable around
some sort of default qemu performance tests?
.
r~
