On Oct 20, 2012, at 4:00 PM, Nikolay Denev <nde...@gmail.com> wrote:
> > On Oct 20, 2012, at 3:11 PM, Ivan Voras <ivo...@freebsd.org> wrote: > >> On 20 October 2012 13:42, Nikolay Denev <nde...@gmail.com> wrote: >> >>> Here are the results from testing both patches : >>> http://home.totalterror.net/freebsd/nfstest/results.html >>> Both tests ran for about 14 hours ( a bit too much, but I wanted to compare >>> different zfs recordsize settings ), >>> and were done first after a fresh reboot. >>> The only noticeable difference seems to be much more context switches with >>> Ivan's patch. >> >> Thank you very much for your extensive testing! >> >> I don't know how to interpret the rise in context switches; as this is >> kernel code, I'd expect no context switches. I hope someone else can >> explain. >> >> But, you have also shown that my patch doesn't do any better than >> Rick's even on a fairly large configuration, so I don't think there's >> value in adding the extra complexity, and Rick knows NFS much better >> than I do. >> >> But there are a few things other than that I'm interested in: like why >> does your load average spike almost to 20-ties, and how come that with >> 24 drives in RAID-10 you only push through 600 MBit/s through the 10 >> GBit/s Ethernet. Have you tested your drive setup locally (AESNI >> shouldn't be a bottleneck, you should be able to encrypt well into >> Gbyte/s range) and the network? >> >> If you have the time, could you repeat the tests but with a recent >> Samba server and a CIFS mount on the client side? This is probably not >> important, but I'm just curious of how would it perform on your >> machine. > > The first iozone local run finished, I'll paste just the result here, and > also the same test over NFS for comparison: > (This is iozone doing 8k sized IO ops, on ZFS dataset with recordsize=8k) > > NFS: > random random > bkwd record stride > KB reclen write rewrite read reread read write > read rewrite read > 33554432 8 4973 5522 2930 2906 2908 3886 > > > Local: > random random > bkwd record stride > KB reclen write rewrite read reread read write > read rewrite read > 33554432 8 34740 41390 135442 142534 24992 12493 > > > > P.S.: I forgot to mention that the network is with 9K mtu. Here are the full results of the test on the local fs : http://home.totalterror.net/freebsd/nfstest/local_fs/ I'm now running the same test on NFS mount over the loopback interface on the NFS server machine. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
