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RE: [Xen-users] Poor performance running WinXP x86 hvm underCentOS5.1x64

To: "Joseph L. Casale" <jcasale@xxxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Poor performance running WinXP x86 hvm underCentOS5.1x64 with xen3.1
From: "Ross S. W. Walker" <rwalker@xxxxxxxxxxxxx>
Date: Thu, 10 Apr 2008 12:21:03 -0400
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Thread-topic: [Xen-users] Poor performance running WinXP x86 hvm underCentOS5.1x64 with xen3.1
Joseph L. Casale wrote:
> > I found on some CPUs an ACPI based HVM chews up a lot of CPU time versuses
> > an APIC HVM, so in Windows I would change the computer type in device
> > manager to "Standard PC" and disable acpi in the domain config.
> > 
> > -Ross
> Wow,
> Night and day! Thanks for that tip. So how does one install 
> Vista or more importantly W2008 Server on Xen and maintain 
> usable performance?

If you have a more recent motherboard/cpu combo then ACPI should
perform better, otherwise I guess you suck it up ;-)

It all depends on how good of an implementation your BIOS does
of ACPI really. I don't know which BIOSs work well and which
don't, maybe somebody else on the list has some input on this,
or a link to a site that lists the poor performing ACPI BIOSs.


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