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xen-users
Re: [Xen-users] GPLPV drivers and Windows 2008
I retransmit on the list because I forgot to ...
On 10.10.2008 03:16, James Harper wrote:
Hello all,
I have been testing a Windows 2008 server on xen 3.2-1 (from debian
backports) on etch and I got very bad perf with GPLPV drivers with
disks
(I can't get more than 3/5 Mo/s).
I am quite sure that I have drivers enabled because device manager
show
them and report them as working correctly.
The difference between a normal installation and my Xen one is that I
do
not have access to write caching optimization (the option "Enable
write
caching on the disk" is not present at all).
The 'write caching' is presumably Windows responding to a feature
reported by the disk. As my drivers don't cache anything anyway, even if
I reported it as available it wouldn't actually do anything.
Is there something I should do ?
I am running 0.9.11pre17 GPLPV drivers.
Can you tell me how you are measuring performance?
With iozone, in fact it's more 6/7Mo but still it's not gorgeous, I was
able to check the result with the ressource monitor and with iostat
(running in dom0 while iozone was running).
Cheers.
Matthieu
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