Single Priority Array CPU Scheduler

Peter Williams wrote:
 > The single priority array scheduler (SPA) is a patch that simplifies
 > the O(1) scheduler while maintaining its good scalability and
 > interactive response characteristics. The patch comes as four sub
 > patches to simplify perusal of the changes:

An updated version of this scheduler is now available for 2.6.7-rc3 at:

<http://users.bigpond.net.au/Peter-Williams/patch-2_6_7_rc3-SPA-v0.1>
<http://users.bigpond.net.au/Peter-Williams/patch-2_6_7_rc3-SPA_IAB-v0.1>
<http://users.bigpond.net.au/Peter-Williams/patch-2_6_7_rc3-SPA_TPB-v0.1>
<http://users.bigpond.net.au/Peter-Williams/patch-2_6_7_rc3-SPA_TSTATS-v0.1>

These patches should be applied in the order that they are listed.

Also, as promised, the first of these patches has been unified with the 
staircase scheduler and a patch that implements the staircase scheduler 
on top of the first of the above patches is available at:

<http://users.bigpond.net.au/Peter-Williams/patch-2_6_7_rc3-SPA_STAIRCASE-v0.1>

This scheduler is functionally equivalent to Con Kolivas's v6.4 
scheduler except that a promotion feature (that will trigger very 
infrequently probably never :-)) has been added.  This was added 
because, although it is extremely unlikely, starvation is possible with 
the staircase scheduler and this feature removes that possibility.

Peter
-- 
Peter Williams                                   pwil3058@bigpond.net.au

"Learning, n. The kind of ignorance distinguishing the studious."
  -- Ambrose Bierce

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