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Re: Is it possible to replace the scheduler in a Hurd system?


From: Neal H. Walfield
Subject: Re: Is it possible to replace the scheduler in a Hurd system?
Date: Tue, 26 Aug 2008 13:26:45 +0200
User-agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (Shij┼Ź) APEL/10.6 Emacs/21.4 (i486-pc-linux-gnu) MULE/5.0 (SAKAKI)

At Tue, 26 Aug 2008 12:46:49 +0200,
Arne Babenhauserheide wrote:
> Since I just skimmed over scheduling, the question bit me, if itis possible 
> to 
> replace the scheduler in a Hurd system as user. 
> 
> Is it possible to replace the scheduler for my own processes? 
> 
> -> The general scheduler governing when which user may act, the user 
> schedulers governing the processes of that user? 
> 
> (or something similar)

On GNU Mach, this is not currently possible without changing the
implementation.  For ideas on how to implement such a system, check
out:

  CPU Inheritance Scheduling, Bryan Ford and Sai R. Susarla. OSDI
  1996.
  http://www.bford.info/pub/os/inherit-sched.pdf

and:

  Towards effective user-controlled scheduling for microkernel-based
  systems, Jan Stoess.  SIGOPS OSR, July 2007.
  http://portal.acm.org/citation.cfm?id=1278901.1278910

Neal




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