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

[David Hopwood <david.nospam.hopwood@xxxxxxxxxxxxxxxx>]

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