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] Fwd: Credit-Based CPU Scheduler

To: Omer Khalid <Omer.Khalid@xxxxxxx>, xen-users list <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Fwd: Credit-Based CPU Scheduler
From: "Su, Disheng" <disheng.su@xxxxxxxxx>
Date: Wed, 17 Dec 2008 09:17:37 +0800
Accept-language: en-US
Acceptlanguage: en-US
Cc: "Su, Disheng" <disheng.su@xxxxxxxxx>
Delivery-date: Tue, 16 Dec 2008 17:19:08 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <77e5896b0812161439p29a1c731t4b8cea625f63a235@xxxxxxxxxxxxxx>
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/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <77e5896b0812160247j59a4f1acqdfcb028c50e15d93@xxxxxxxxxxxxxx> <77e5896b0812161439p29a1c731t4b8cea625f63a235@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Aclfz0qgQ0+PkAl1S+mFE9V+Cqdw7QAFN0kw
Thread-topic: [Xen-users] Fwd: Credit-Based CPU Scheduler
Hi Omer,
        Maybe no mathematical formula for credit scheduler... 
        There are three kinds of priorities: BOOST, UNDER, OVER. Usually, guest 
vcpu is in UNDER if its credit is not used out, or in OVER.
        In http://markmail.org/message/oiqibkmkak75zv5z, you'll find the 
details about how to calculate the credit.
        And http://www.xen.org/files/xensummit_tokyo/15_NaokiNishiguchi-en.pdf, 
gives you the insight how credit scheduler works. 
Omer Khalid wrote:
> Hi,
> I am researching on optimization of virtual machines running
> high-performance computing applications. I looked up on Xen
> Credit-Based CPU Scheduler twiki page but could not find the
> mathematical formula for calculating the priorities:
> http://wiki.xensource.com/xenwiki/CreditScheduler
> I guess there would be one, probably not published on the web, so it
> would be great if some knows about it.
> Thanks,
> Omer
> -------------------------------------------------------
> CERN -- European Organization for Nuclear
> Research, IT Department, CH-1211,
> Geneva 23, Switzerland
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

Best Regards,
Disheng, Su
Xen-users mailing list

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