Date: Mon, 08 Sep 2014 14:24:50 +0200 From: Marko Lerota <mlerota@pdsvelebit.hr> To: Roger Pau =?utf-8?Q?Monn=C3=A9?= <roger.pau@citrix.com> Cc: FreeBSD XEN <freebsd-xen@freebsd.org> Subject: Re: Poor disk IO on Xenserver 6.2 Message-ID: <86vboy1er1.fsf@arch.perpetuum.hr> In-Reply-To: <5405FD77.2000102@citrix.com> ("Roger Pau \=\?utf-8\?Q\?Monn\?\= \=\?utf-8\?Q\?\=C3\=A9\=22's\?\= message of "Tue, 2 Sep 2014 19:25:11 %2B0200") References: <86lhq7odub.fsf@arch.perpetuum.hr> <5400B39E.3090904@citrix.com> <86tx4un8bd.fsf@cosmos.claresco.hr> <5405FD77.2000102@citrix.com>
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Roger Pau Monn=C3=A9 <roger.pau@citrix.com> writes: > FreeBSD was able to deliver >30000iops in all cases, and the throughput > was around 1000MB/s for all test cases also. On the other hand, Linux > was only able to deliver around 10000iops, with a throughput of > ~400MB/s. This was tested using xen-unstable and a Linux v3.15 Dom0. > > Could you try to run this benchmark on both your FreeBSD and Linux > guests? Please make sure guests are set to use the same amount of > RAM/CPUs. Sorry for late reply.=20 I have installed today new beta version of Xenserver from 2014-09-05 XenServer release 6.4.96-88161c (xenenterprise) uname -a 3.10.0+2 #1 SMP Thu Sep 4 12:04:32 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux Didn't have time to learn fio program so I did simple test with copy-paste. Again on Debian 7.6.0 stable files have been copied=20 at 300MB/s speed while FreeBSD 10 release had 25MB/s.=20 I just did:=20 cp some-big-file file1-test and I measured the time from start to finish. Both hosts have the=20 same amount of RAM, DISK and CPUs. I also tested this on 3 different servers. HP ML330, HP DL160 and old Sun X2200. The results are the same.=20 --=20 Marko Lerota Sent from my GNU Emacs/Gnus Mailer
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