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-devel] Xen CPU limit?

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Xen CPU limit?
From: Martin Lukasik <martin.lukasik@xxxxxxxxxxxxx>
Date: Tue, 30 Mar 2010 10:32:29 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Tue, 30 Mar 2010 02:34:52 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20100330092624.GA1878@xxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4B991586.30602@xxxxxxxxxxxxx> <20100329154901.GE1878@xxxxxxxxxxx> <4BB1C174.6030901@xxxxxxxxxxxxx> <20100330092624.GA1878@xxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Thunderbird (X11/20090625)
Pasi Kärkkäinen wrote:

Why do you need to have all the cores visible to dom0? It's usually enough to have a couple of cores for dom0, and the rest free/available in Xen hypervisor for other guests.

I read three books about Xen, but surely they weren't a good read. Many things haven't been even mentioned (btw: can anyone recommend a *good* book on Xen?) I thought that the way it works is: you set up Dom0 with max number of CPUs and then allocate them to VMs.
But since Dom0 is a VM as Keir said, then it all must be up to a hypervisor.

So I need a hypervisor to support 48 cores, then set up Dom0 with let's say 2 vCPUs and 1GB of RAM, and create other VMs according to my requirements.
Am I right?

Thank you,

Martin Lukasik                                    tel: +44 20 7269 3115
Bioinformatics Officer
Bioinformatics and Biostatistics
Cancer Research UK, London Research Institute
44 Lincoln's Inn Fields, London, WC2A 3PX, UK

This communication is from Cancer Research UK. Our website is at 
www.cancerresearchuk.org. We are a charity registered under number 1089464 and a 
company limited by guarantee registered in England & Wales under number 
4325234. Our registered address is 61 Lincoln's Inn Fields, London WC2A 3PX. Our 
central telephone number is 020 7242 0200.

This communication and any attachments contain information which is 
confidential and may also be privileged.   It is for the exclusive use of the 
intended recipient(s).  If you are not the intended recipient(s) please note 
that any form of disclosure, distribution, copying or use of this communication 
or the information in it or in any attachments is strictly prohibited and may 
be unlawful.  If you have received this communication in error, please notify 
the sender and delete the email and destroy any copies of it.

E-mail communications cannot be guaranteed to be secure or error free, as 
information could be intercepted, corrupted, amended, lost, destroyed, arrive 
late or incomplete, or contain viruses.  We do not accept liability for any 
such matters or their consequences.  Anyone who communicates with us by e-mail 
is taken to accept the risks in doing so.

Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>