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Re: [Xen-users] Improve performance of domain U

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Improve performance of domain U
From: "Martin Svedin" <martin.svedin@xxxxxxxxx>
Date: Sun, 3 Sep 2006 11:17:20 +0200
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I have a similar question. When I get some load on my dom0 all the
domUs more or less freeze and are impossible to work with (though the
dom0 is as responsive as ever (unless I have some really heavy load
ofcourse :) ) ).

Is there some (easy) way to make sure that the dom0 doesn't 'steal'
the CPU or is this working as intended?

On 9/3/06, saptarshi naha <naha80@xxxxxxxxx> wrote:
I just had a quick question about improving the performance for Xen VM's.

I have installed Xen 3.0.2 on RHEL4 with 1 kernel compiled for all
domains. When I access by VM's the performance of the domain U is
slower then taht of domain 0.

1. I wanted to know if there are any configuration changes I can make
to improve the performance of domain U?

2. Domain U have no /boot sector in /etc/fstab. It is all a single
partition in / . I wanted to know if there are any shortcoming to just
having / partition to performance?

3. Also can the domain U be given swap space to improve performance? I
am guesssing thats the swap is used from domain 0 which was added
during inital installation.

4. Is the performance of teh domain U dropped due to internal
networking through bridging? I wanted to know if anyone knows how to
fine tune it to improve performance.


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