[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [Xen-users] Fwd: Credit-Based CPU Scheduler

  • To: Omer Khalid <Omer.Khalid@xxxxxxx>, xen-users list <xen-users@xxxxxxxxxxxxxxxxxxx>
  • 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
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • 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



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.