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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.
-- Keir 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 :-)Thanks, -bryan
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