From owner-freebsd-xen@FreeBSD.ORG Mon Sep 8 12:34:27 2014 Return-Path: Delivered-To: freebsd-xen@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A6DD6D14 for ; Mon, 8 Sep 2014 12:34:27 +0000 (UTC) Received: from mail.claresco.hr (zid.claresco.hr [89.201.163.42]) by mx1.freebsd.org (Postfix) with ESMTP id 565DC174C for ; Mon, 8 Sep 2014 12:34:26 +0000 (UTC) Received: from mail.claresco.hr (localhost [127.0.0.1]) by mail.claresco.hr (Postfix) with ESMTP id A23442ADFC0; Mon, 8 Sep 2014 14:24:51 +0200 (CEST) Received: from arch.perpetuum.hr.claresco.hr (unknown [213.191.141.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.claresco.hr (Postfix) with ESMTPSA id 7641E2ADF99; Mon, 8 Sep 2014 14:24:51 +0200 (CEST) From: Marko Lerota To: Roger Pau =?utf-8?Q?Monn=C3=A9?= Subject: Re: Poor disk IO on Xenserver 6.2 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 +0200") Organization: *BSD Users - Fanatics Dept. References: <86lhq7odub.fsf@arch.perpetuum.hr> <5400B39E.3090904@citrix.com> <86tx4un8bd.fsf@cosmos.claresco.hr> <5405FD77.2000102@citrix.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAJFBMVEWgnbRLVpRNVY9jMRPh s21jSlEyNVX45Mv4zI+sbUclFAtMVpT8V0lFAAACZ0lEQVR4nG3Tv2vbQBQHcFMogWyeNeVK BLXGl5j6xnABOaNTuXFGmWpwtw519yj4soW6AatT4GKD3+aDZrl/rt/Tr9qlGiz7Pn7v3bsf HVc/NrIiSfElqH53GgijcCqzk/+AmBF5cN0DsFlIRGMh/oHuqxkTM6VlzB4EoZEs2aSZOASb EQJYZpweQshE697GTDndBXtgp9LIT9+OpDGHEfb9knk+nx+jfN1JCVZMCl6XwFm0a2EXztZD 3s4fj47ZbKI2VeBmJImeEfGLJ+M9sDPilX7IB5rN6sdfcGhuoHU+LC4nxfnI7YOJtdb95Gb+ fbgJ2uJ2ZgaA++f5ZzBqNCCYfMTd5q0BfBVNqm7I8gUjQ+YtXotRW6PH9AEj+dKs/KuNQAl5 o/NY+QkonW8aQAl0oXMYPvRiXIM4pRJifbXytnhTA8alBx/jefG2ar3DBlt34/PXz9M+nMVN iNaPUdCApJc2ItejOmLGoK1qQLV9pJmXBnL10DYoBA5aHNfj8ZNwZa5O4CzgTJeilKJmrQJs IHIt1/7/Sg2p3iq/Hz0/5W05rq4M9aN2B5FLohUP4ylVyfxhEIjAs8J4PhIJ9U+CEroogib5 BXAf7bB4vkfAzgPFt1tM9sJZAOH+lCexhwswuNtim4QTZdokqo4o89LkH7V6iFxICeqfp+Wh fmUuGPunLj2Meti6Cn4DjJ/UReROqR+aqawAi/JkfgKE64rrfkhjU8MtT8ivR4S5n6Yo08A7 HvgAlHDWRSGlNSDxwK9HtXy4FS2I60EdUIJM+Ut9OZNJG4CpbEQW1VBQoQoPuBw2EVa4P0u0 TgzQF+VoAAAAAElFTkSuQmCC Date: Mon, 08 Sep 2014 14:24:50 +0200 Message-ID: <86vboy1er1.fsf@arch.perpetuum.hr> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: ClamAV using ClamSMTP Cc: FreeBSD XEN X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Sep 2014 12:34:27 -0000 Roger Pau Monn=C3=A9 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