Re: [Xen-ia64-devel] problems with smp

["David Brown" <dmlb2000@xxxxxxxxx>]

>    What kind of load are you running?  If it involves I/O, then all that
> has to go through dom0 and can bottleneck the other domains.  There's
> also some overhead in scheduling between vCPUs and time spent running in
> Xen itself, so you may not be able to reach that 200% total, but I'd
> think you could get closer than 150%.  Thanks,
Yeah, its very I/O driven, running a distributed filesystem under
xen... so could the xen kernel be switching too much then? is there
anyway to provide some nice like level to an OS so that it can get
most of the time running? Would pci sharing rather than block sharing
help (if there's more than one block per pci device)?

- David Brown

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