Mailing List Archive: load balance w/multiple processors?

load balance w/multiple processors?

Jun 29, 2005, 7:22 AM

Post #1 of 3 (347 views)

Hi,
I've got a couple of dual-core dual-processor Opteron boxes that I'm
thinking about running xen on. From my testing so far, it looks to me
that once a domain has been assigned to a particular processor, it will
only use that processor, even if one of the other processors is idle.
Is this correct? If so, is this something that is being worked on?
...thnx,
...dave

--
Dave Alden
OSU Department of Mathematics

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Re: load balance w/multiple processors? [ In reply to ]

mark.williamson at cl

Jun 29, 2005, 7:31 AM

Post #2 of 3 (321 views)

Permalink

> I've got a couple of dual-core dual-processor Opteron boxes that I'm
> thinking about running xen on.

Waaaaa! Mathematicians have better machines than me. :-)

> From my testing so far, it looks to me
> that once a domain has been assigned to a particular processor, it will
> only use that processor, even if one of the other processors is idle.
> Is this correct? If so, is this something that is being worked on?

Yes. Xen 3.0 will allow multiprocessor guests. Also, a domain load balancer
is being worked on that'll automatically repin guests to other CPUs. I guess
that'll end up in 3.0 too...

In the meantime, the best you can do is to do a coarse grained manual "repin"
when your system load changes significantly.

Cheers,
Mark

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Re: load balance w/multiple processors? [ In reply to ]

sretzki at gmx

Jun 29, 2005, 7:36 AM

Post #3 of 3 (335 views)

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On Wed, Jun 29, 2005 at 10:22:32AM -0400, Dave Alden wrote:
> Is this correct? If so, is this something that is being worked on?

Yes, Yes, imho.

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