On 19 July 2012 11:27, Richard Yao <r...@gentoo.org> wrote: > Dear Everyone, > > FreeBSD 9 has awful block IO performance in KVM. I have experienced it > and others have experienced it. Someone posted slides to slideshare with > benchmarks documenting it: > > http://www.slideshare.net/TakeshiHasegawa1/runningfreebsdonlinuxkvm > > Slides 13 and 20 are particular eye openers. Does anyone know what is wrong?
For those watching at home - this is bad performance _with_ the virtio drivers themselves, not just with SCSI emulation. Slide 17 is very telling - the operation latency is quite high. Richard, are you able to easily test out things on FreeBSD-HEAD guest in a Linux KVM? If so, some of the storage/block/GEOM driver people may be able to step up and start offering some ideas. Thanks, Adrian _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
