This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] Re: dual core/dual proc

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Re: dual core/dual proc
From: Matthew Wild <M.Wild@xxxxxxxx>
Date: Thu, 08 Feb 2007 14:53:36 +0000
Delivery-date: Thu, 08 Feb 2007 06:53:40 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <20070207065156.GA14724@xxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <45C96165.9020608@xxxxxxxxxx> <20070207055640.GA13321@xxxxxxxxxxx> <45C96D27.6060307@xxxxxxxxxx> <20070207065156.GA14724@xxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Thunderbird (X11/20060911)
Matthew Palmer wrote:
> On Tue, Feb 06, 2007 at 09:09:43PM -0900, Jon Reynolds wrote:
>> Matthew Palmer wrote:
>>> On Tue, Feb 06, 2007 at 08:19:33PM -0900, Jon Reynolds wrote:
>>>> Is anybody running dual processors with dual cores that works with Xen? 
>>>> I have been trying to find such a board and have had no luck in finding 
>>>> a definite answer. If anyone is doing this, can you tell me what procs 
>>>> and what board you are using?
>>> We've got 2.8GHz Xeons in Dell 1850s and Opteron 275s on Tyan (I think)
>>> boards and have never had any problem running Xen on any of them.  What
>>> dual-core specific problems are you seeing?
>> No problems, I just don't want to spend a lot of money and have it not 
>> be able to do what I want.
> Oh, I see.  I misread your message as saying that you were having problems
> with an existing hardware setup.
>> Is only the Xeon and Opteron dual cores able to be used in a dual
>> processor config?
> I'm not real sure about the Xeon, but the Opterons come in three (from
> memory) different "series" -- 1xx, 2xx, and 8xx.  That first digit indicates
> the maximum number of CPUs that can work together, so any 2xx Opteron that's
> dual core will satisfy your requirements, while a 1xx Opteron won't do the
> job.
> Spreading the net wider, I have to say that I'm not particularly familiar
> with the abilities of the "cheaper" CPU ranges (Pentium, Athlon64, X2, etc),
> as we're all Xeon/Opteron where I work.
> Really, you're best off speaking to a hardware supplier about CPU/board
> combos, as they'll know what will work together with what.
> A word of caution: although I'm a general fan of AMD CPUs, I've had a lot of
> problems with getting solid Linux compatibility out of motherboards
> recently; I think that there's just a lack of good chipsets out there for
> AMDs with solid Free driver support.  As such, buying a Xeon system with an
> Intel-chipset motherboard will probably, statistically, give you less
> problems than AMD systems (as much as it pains me to admit it).
We've got 20+ boxes with Opterons and not had a problem with any, other
than a couple of Iwill workstations. All my motherboards are Tyan, all
the way from single to quad CPU.

Xen is running happily on a couple of dual CPU-dual core boxes as well
as the quad CPU box. Soon to be joined, on loan, by a Sun X4600 M2 with
up to 8 dual core CPUs.

Matthew Wild                       Tel.: +44 (0)1235 445173
M.Wild@xxxxxxxx                    URL http://www.ukssdc.ac.uk/
UK Solar System Data Centre and
World Data Centre - Solar-Terrestrial Physics, Chilton
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX

Xen-users mailing list