On Wed, Jun 15, 2011 at 7:30 PM, Avi Kivity <avi@xxxxxxxxxx> wrote: > On 06/15/2011 06:53 PM, Pekka Enberg wrote: >> >> - Fast QCOW2 image read-write support beating Qemu in fio benchmarks. See >> the >> following URL for test result details: https://gist.github.com/1026888 > > This is surprising. How is qemu invoked? Prasad will have the details. Please note that the above are with Qemu defaults which doesn't use virtio. The results with virtio are little better but still in favor of tools/kvm. > btw the dump above is a little hard to interpret. It's what fio reports. The relevant bits are: Qemu: Run status group 0 (all jobs): READ: io=204800KB, aggrb=61152KB/s, minb=15655KB/s, maxb=17845KB/s, mint=2938msec, maxt=3349msec WRITE: io=68544KB, aggrb=28045KB/s, minb=6831KB/s, maxb=7858KB/s, mint=2292msec, maxt=2444msec Run status group 1 (all jobs): READ: io=204800KB, aggrb=61779KB/s, minb=15815KB/s, maxb=17189KB/s, mint=3050msec, maxt=3315msec WRITE: io=66576KB, aggrb=24165KB/s, minb=6205KB/s, maxb=7166KB/s, mint=2485msec, maxt=2755msec Run status group 2 (all jobs): READ: io=204800KB, aggrb=6722KB/s, minb=1720KB/s, maxb=1737KB/s, mint=30178msec, maxt=30467msec WRITE: io=65424KB, aggrb=2156KB/s, minb=550KB/s, maxb=573KB/s, mint=29682msec, maxt=30342msec Run status group 3 (all jobs): READ: io=204800KB, aggrb=6994KB/s, minb=1790KB/s, maxb=1834KB/s, mint=28574msec, maxt=29279msec WRITE: io=68192KB, aggrb=2382KB/s, minb=548KB/s, maxb=740KB/s, mint=27121msec, maxt=28625msec Disk stats (read/write): sdb: ios=60583/6652, merge=0/164, ticks=156340/672030, in_queue=828230, util=82.71% tools/kvm: Run status group 0 (all jobs): READ: io=204800KB, aggrb=149162KB/s, minb=38185KB/s, maxb=46030KB/s, mint=1139msec, maxt=1373msec WRITE: io=70528KB, aggrb=79156KB/s, minb=18903KB/s, maxb=23726KB/s, mint=804msec, maxt=891msec Run status group 1 (all jobs): READ: io=204800KB, aggrb=188235KB/s, minb=48188KB/s, maxb=57932KB/s, mint=905msec, maxt=1088msec WRITE: io=64464KB, aggrb=84821KB/s, minb=21751KB/s, maxb=27392KB/s, mint=570msec, maxt=760msec Run status group 2 (all jobs): READ: io=204800KB, aggrb=20005KB/s, minb=5121KB/s, maxb=5333KB/s, mint=9830msec, maxt=10237msec WRITE: io=66624KB, aggrb=6615KB/s, minb=1671KB/s, maxb=1781KB/s, mint=9558msec, maxt=10071msec Run status group 3 (all jobs): READ: io=204800KB, aggrb=66149KB/s, minb=16934KB/s, maxb=17936KB/s, mint=2923msec, maxt=3096msec WRITE: io=69600KB, aggrb=26717KB/s, minb=6595KB/s, maxb=7342KB/s, mint=2530msec, maxt=2605msec Disk stats (read/write): vdb: ios=61002/6654, merge=0/183, ticks=27270/205780, in_queue=232220, util=69.46% -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
