[CentOS-virt] Windows Xen VM's have high guest CPU usage and poor performance
rpug at linux.com
Thu Jan 21 21:39:31 UTC 2010
Pasi Kärkkäinen wrote:
> Oh, one more thing.. is it only the guest VM taking cpu time
> when you monitor with "xm top"?
> Do you have the latest service packs installed in the guest?
> Have you tried monitoring the performance from inside the guest,
> to figure out what takes cpu time there?
> -- Pasi
The guest is running XP w/ SP3. It is not just the guest VM taking cpu
time. Basically, whatever process I am doing hits 100% cpu usage in
Windows. If I open IE, it will use 100% cpu for a bit while it opens.
If I try to click on a website, it will do it again. Thus, it is
causing a very sluggish session as it keeps pausing. It isn't just IE,
it's any program I try to use. This CPU usage is reflected in xm top as
both the guest's CPU% will hit 100% as will Dom-0.
I have done pretty much everything specified in the Xen Best Practices.
In fact, I have dedicated 4GB to Dom-0.
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