From mboxrd@z Thu Jan 1 00:00:00 1970 From: "pradeep singh rautela" Subject: Re: Xen scheduler Date: Sat, 21 Apr 2007 14:51:52 +0530 Message-ID: <6bc632150704210221n66cc0cabpd32f366d127662af@mail.gmail.com> References: <042120070603.1707.4629A924000D2BC9000006AB2200735446CCCCCC050E9F@comcast.net> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0009175933==" Return-path: In-Reply-To: <042120070603.1707.4629A924000D2BC9000006AB2200735446CCCCCC050E9F@comcast.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Mime-version: 1.0 Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "pak333@comcast.net" Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org --===============0009175933== Content-Type: multipart/alternative; boundary="----=_Part_149398_10807563.1177147311999" ------=_Part_149398_10807563.1177147311999 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline On 4/21/07, pak333@comcast.net wrote: > > Hi, > > On running on a dual/quad core does the Xen scheduler take into account > the physical layout of the cores. > For example if a VM has two vcpus, and there are 4 physical cpus free, > will it take care to assign the 2vcpus (from a VM) to 2 pcpus on the same > socket. > Shouldn't this is be concealed.You may never know which physical CPU is actualyl running a vcpu. It may get scheduled on to a different physical CPU depending on the load on the other CPUs. CMIIW ~psr Thanks > - Prabha > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > > -- --- pradeep singh rautela "Genius is 1% inspiration, and 99% perspiration" - not me :) ------=_Part_149398_10807563.1177147311999 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline

On 4/21/07, pak333@comcast.net <pak333@comcast.net> wrote:
Hi,
 
On running on a dual/quad core does the Xen scheduler take into account the physical layout of the cores.
For example if a VM has two vcpus, and there are 4 physical cpus free,  will it take care to assign the 2vcpus (from a VM) to 2 pcpus on the same socket.

Shouldn't this is be concealed.You may never know which physical CPU is actualyl running a vcpu. It may get scheduled on to a different physical CPU depending on the load on the other CPUs.

CMIIW

~psr

Thanks
- Prabha
 

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pradeep singh rautela

"Genius is 1% inspiration, and 99% perspiration" - not me :) ------=_Part_149398_10807563.1177147311999-- --===============0009175933== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel --===============0009175933==--