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

[Fabiano Francesconi <fabiano.francesconi@xxxxxxxxx>]

Hello there,
I'm noticing a performance regression for what's matter the hard-disk I
pass to the domU (aquaria).

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]

Attachment: 2.6.29-xen-r4.config
Description: Text document

Attachment: aquaria.cfg
Description: Text document

Attachment: dmesg.2.26.29
Description: Text document

Attachment: dmesg.2.26.32
Description: Text document

Attachment: regression.log
Description: Text document

Attachment: 2.6.32-xen-r1.config
Description: Text document

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