Hi Dennis,
On Tue, Aug 25, 2015 at 7:45 AM, Dennis Luehring <dl.so...@gmx.net> wrote: > Am 25.08.2015 um 06:19 schrieb Richard Henderson: >> >> Artyom and Dennis, I'm hoping that this will help with some of your >> translation performance problems. I don't currently have a sparc64 >> kernel set up for booting, but I did smoke test this with openbios, >> and even there it reduced the number of TBs created. > > > i don't really can say it improves something - but maybe im just not the > right person to interpret the numbers > > your patch gives the worst result in stream benchmark but nearly the best in > pugixml compile times and prime.c runtime > every tried patch or branch nearly halfs the speed of the stream benchmark > comapred to qemu-git-master This is very surprising: the patch should have no effect on a sun4u machine. Have you applied it to the master or some other branch? Have you pulled the master branch recently? Maybe there was another change affecting the performance? Artyom > legende: > tcg-indirect => git://github.com/rth7680/qemu.git tcg-indirect > without-optimization => qemu-git-master + undefine USE_TCG_OPTIMIZATIONS > build flags for gcc are unrelevant because im using always the same > > system: > Ubuntu 15.04 x64 Host, NetBSD SPARC64 guest running from ramdisk (to reduce > io noise) > > pugixml.cpp buildtime: > build: g++ src/pugixml.cpp -g -Wall -Wextra -Werror -pedantic -std=c++0x -c > -MMD -MP > > results: > tcg-indirect: ~2:46.5 > qemu.org-git: ~2:51.2 !!WORST!! > without-optimization: ~2:14.1 !!BEST!! > patch-Store-mmu-index-in-TB-flags: 2:38.4 > > prime.c runtime (Aurelien Jarno sysbench extracted int primer) > build: gcc prime.c -o prime.out -lm) > > results: > tcg-indirect: ~9.3 sec !!BEST!! > qemu-git-master: ~11 sec !!WORST!! > without-optimization: ~9.9 sec > patch-Store-mmu-index-in-TB-flags: ~9.7sec > > stream (https://www.cs.virginia.edu/stream/) > > build: gcc stream.c -o stream.out -lm) > > tcg-indirect: > Function Best Rate MB/s Avg time Min time Max time > Copy: 320.8 0.511297 0.498785 0.590214 > Scale: 187.0 0.858693 0.855465 0.863527 > Add: 218.2 1.104654 1.099698 1.110341 > Triad: 169.5 1.433273 1.416321 1.502248 > > qemu-git-master: !!BEST!! > Function Best Rate MB/s Avg time Min time Max time > Copy: 771.5 0.214717 0.207377 0.244214 > Scale: 288.1 0.573320 0.555401 0.660161 > Add: 423.5 0.633523 0.566661 1.092067 > Triad: 242.9 1.053032 0.987970 1.499563 > > without-optimization: > Function Best Rate MB/s Avg time Min time Max time > Copy: 316.6 0.524065 0.505313 0.580103 > Scale: 200.5 0.813356 0.798024 0.840986 > Add: 243.9 1.010247 0.984025 1.119149 > Triad: 182.9 1.345601 1.312236 1.427459 > > patch-Store-mmu-index-in-TB-flags: !!WORST!! > Function Best Rate MB/s Avg time Min time Max time > Copy: 276.2 0.585113 0.579193 0.595607 > Scale: 181.3 0.895991 0.882744 0.917396 > Add: 215.9 1.126226 1.111750 1.174236 > Triad: 167.0 1.469888 1.436790 1.523211 > -- Regards, Artyom Tarasenko SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu
