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Re: [Xen-devel] unusual domU memory performance
The only thing I could imagine is that maybe Xen incorrectly schedules
the idle domain at some points, and that stops happening if you run two
domains against each other. That would be a pretty stupid scheduling
bug though and I'm pretty sure it's not happening.
On 14 Nov 2005, at 13:41, Bryan D. Payne wrote:
What CPUs are the domains running on? This is most likely an artefact
of the machine architecture, and nothing to do with Xen.
Interesting. The system is running with a single AMD Athlon 64 3500+
processor (note that both dom0 and domU are compiled as 32-bit
systems). There is a total of 2GB of RAM in the system, I have 1500
allocated to dom0 and 256 to domU.
I had been contemplating this being an artifact of the system, but
couldn't come up with any reasonable explanation in my mind. It just
seems off that if one program is being a resource hog, the other
wouldn't speed up. However, I couldn't help but wonder if this was
somehow stressing Xen in such a way as to cause some unusual behavior.
Anyway, if it's not Xen, then I shall keep looking elsewhere :-)
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