Re: Some Xen performance measurements

[jkunz%unixag-kl.fh-kl.de@localhost (Jochen Kunz)]

On Fri, Apr 01, 2005 at 12:29:43PM +0300, Martti Kuparinen wrote:

> - One would assume that running 4 VMs would take 4x the compilation time
>   compared to 1 VM. Any ideas why the time is only 1600 instead of 2000?
Interleaving of IO between the VMs? I.e. if only a single VM is running
and needs IO, it has to wait and the CPU goes idle as long as the disk
needs to do the IO. If there are multiple VMs running this CPU idle time
is used by the other VMs to do compute work.
-- 



tschüß,
         Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/