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[Xen-devel] Why is the credit scheduler better than SEDF

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "Ming Chang" <mingchieh.xen@xxxxxxxxx>
  • Date: Sun, 11 Mar 2007 01:15:31 +0800
  • Delivery-date: Sat, 10 Mar 2007 09:14:48 -0800
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Dear all,

I read Xen interface manual, and see the following part in the section 2.5

"SEDF will be going away and its use should be avoided once the credit scheduler has stabilized and become the default"

I think it means SEDF is a temporary scheduler and
credit scheduler is better
I want to understand why the credit scheduling is better? And Is there any problem with SEDF?
and, so far as I know, EDF does not work well in the SMP how about SEDF and credit scheuler?

Thanks for you help

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