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Re: [Xen-users] Xen hard-disk performance regression?

To: Fabiano Francesconi <fabiano.francesconi@xxxxxxxxx>
Subject: Re: [Xen-users] Xen hard-disk performance regression?
From: Andrew Lyon <andrew.lyon@xxxxxxxxx>
Date: Sun, 11 Apr 2010 14:55:24 +0100
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On Sun, Apr 11, 2010 at 11:30 AM, Fabiano Francesconi
<fabiano.francesconi@xxxxxxxxx> wrote:
> Hello there,
> I'm noticing a performance regression for what's matter the hard-disk I
> pass to the domU (aquaria).

Have you checked the performance of the disk in dom0?

> The slow-down is very noticeable even when moving small videos file
> (~350mb).
> In the configuration file of the domU, I pass the whole disk
> ('phy:/dev/sdb,xvdb,w') to the guest OS.
> The distribution under both systems is Gentoo/Linux, x86 arch.
> The hypervisor is always the same, in both scenarios (Linux xevelon
> 2.6.32-xen-r1 #1 SMP Sat Apr 10 13:37:02 CEST 2010 i686 Intel(R)
> Atom(TM) CPU 330 @ 1.60GHz GenuineIntel GNU/Linux).
> The machine is an Atom, so it's not capable of any VT technology but so
> far it's a great machine and XEN is working just fine on it.
> I attach you few logs I've gathered.
> Thank you
> --
> Fabiano Francesconi [GPG key: 0x81E53461]
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