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SubjectRe: 1.2.45 Linux Scheduler
----- Original Message -----
From: Jesse Pollard <>
To: <>; <>
Sent: Wednesday, November 01, 2000 2:27 PM
Subject: Re: 1.2.45 Linux Scheduler

> --------- Received message begins Here ---------
> >
> > In the Linux scheduler they use a circular queue implementation with
> > robin. What is the advantage of this over just using a normal queue with
> > back and front. Also does anyone know what a test plan for such a design
> > would even begin to look like. This is a project for a proposal going
> > in my neighborhood and I am wondering why in the world someone would
want to
> > modify the Linux scheduler to this extent.
> This is not an authoritive answer but:
> It's simple, and fast. Locks only needed when adding/removing
> entries.
> It is also nearly optimum when the queue only has 5 (or so) number of
> entries. It will not be optimum if there are 32/64 CPUs with 120 or more
> runnable entries. There are other schedulers available that may do a
> better job for that situation.

I don't know who runs Linux w/ 32/64 CPUs and w/ 120 active procs but
if someone on earth exist ... :

- Davide

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