Re: [2.4.17/18pre] VM and swap - it's really unusable

Bill Davidsen
2002-01-16T15:28:34Z

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.