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[Xen-devel] Re: Welcome to the "Xen-devel" mailing list

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Subject: [Xen-devel] Re: Welcome to the "Xen-devel" mailing list
From: "Peter Bier" <peter_bier@xxxxxx>
Date: Mon, 28 Mar 2005 13:35:42 +0100
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This is a try to post a follow-up to the thread "poor domU VBD performance" in 
the new newsgroup.
I do not know if this is th adequate way to do so, but I did not find any 
information on how to do 
so otherwise.

This is a response to "Ian Pratt":

Yes I do the performance testing using dd. It's only a simple "benchmark" but 
its results seem to indicate
a fundamental issue. I did the tests with the same partitions from DOM0 just as 
DomU. I used both disks 
and Dom0 achieved in all experiments 2.5 times the transfer rate of DomU. 

I do not know the chipset of my IDE controller on my computer at home, while I 
know that in the office it
pas a Promise raid controller ( I am neither at home nor in the office 
momentarily ) . I am sure, that the
system was idle during all test ( meaning that there was only the standard 
system running with no busy 
jobs and no user program consuming CPU or IO resources. 

I am very interested about Xen, but I need to fiy that problem. 
If there is any "checklist" how to  configure XEN efficiently, I might be able 
to fix the problem myself


    Peter Bier 

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