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Date: Wed, 16 Jan 2002 10:27:33 -0500 (EST)
From: Bill Davidsen <davidsen@tmr.com>
To: Daniel Phillips <phillips@bonn-fries.net>
cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [2.4.17/18pre] VM and swap - it's really unusable
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On Tue, 15 Jan 2002, Daniel Phillips wrote:

> On January 15, 2002 06:26 am, Mark Hahn wrote:
> > > than the task's float, the completion time of the schedule as a whole will be 
> > > delayed.  This is no different for a computer than it is for a group of 
> > > people, it is still a scheduling problem.  Delaying any random task risks 
> > 
> > it is quite different.  with computers, there are often STRONG benefits
> > to clustering, batching, chunking, piggybacking, whatever you want to call it.
> 
> It's no different.

Sorry, there are strong benefits from all of the things mentioned. I lack
time and inclination to explain how caching works, but there are costs of
changing from one thing to another.

The other issue is that processes doing i/o (blocking before a whole
timeslice) will run better if they get priority when they can use the CPU.
Therefore a system needs to recognize (and be tuned) for both of these.

Computers are very different than people in lines.

-- 
bill davidsen <davidsen@tmr.com>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

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