WARNING - OLD ARCHIVES

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/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Some thoughts about the soft real time scheduler for Xen

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Some thoughts about the soft real time scheduler for Xen
From: David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>
Date: Wed, 18 Feb 2004 19:50:17 +0000
Delivery-date: Wed, 18 Feb 2004 22:45:46 +0000
Envelope-to: steven.hand@xxxxxxxxxxxx
In-reply-to: <019201c3f64c$6ed66e80$0100a8c0@barcelona>
List-archive: <http://sourceforge.net/mailarchive/forum.php?forum=xen-devel>
List-help: <mailto:xen-devel-request@lists.sourceforge.net?subject=help>
List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
List-post: <mailto:xen-devel@lists.sourceforge.net>
List-subscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=subscribe>
List-unsubscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=unsubscribe>
References: <E1At8Cf-000746-00@xxxxxxxxxxxxxxxxxxxx> <019201c3f64c$6ed66e80$0100a8c0@barcelona>
Reply-to: david.nospam.hopwood@xxxxxxxxxxxxxxxx
Sender: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040113
Yan-Ching CHU wrote:
> Hi Xen guys,
> 
>     Frist, a (partial) recap of what Ian said before:
> 
> ======================================
> We need a compile (or run time) option to completely replace the
> current BVT scheduler with a soft real time scheduler that allows
> domains to be given guarantees of the form "x microseconds every
> y microseconds" (having a constraint that y must be a power of 2
> or suchlike would be fine)
> 
> If there's CPU time left over after meeting the guarantees of all
> the runnable domains, it should be shared out in a proportional
> manner between domains that have an 'eligible for best-effort
> extra time' flag set.

Can I suggest looking up "hierarchical scheduling" in general, and
this paper in particular: <http://citeseer.nj.nec.com/regehr01hls.html>.

David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>



-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel