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Article #18365

Multithoughts on multitasking

#18365
From: Peter Su
Date: Sat, 22 Aug 1987 02:42
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There are sort of two ways you can look at the usefullness of a
multitasking operating system.  On one level, there is lwo level
support of multiple processes, independent of a high level shell like
the Finder (say).

On another level, there is high level support for easy switching
between tasks, like the cshell in Unix, or Unix with X, or the Amiga.

Now, it is possible to have one, without the other.  The swithcer is
sort of a primitve level of support of multiple tasks, and isn't a
very effiecient approach.  On the ther hand, in early Unix systems,
you didn't have job control, and couldn't switch between tasks easily,
though you could have lots of them.

So, to evaluate the value of the Multifinder, I think we have to know
whether it represents shell support for multiple tasks, or an actual
extension of the Mac operating system to beef up process handling, and
memory mannagement.  The point it, if you can;t do a fork(), and if
applications cannot handle multiple processes by themselves, then it
would be next to useless, and we may as well go back to switcher.

If it *is * real process management, then I think we will see a lot
more neat software coming out for the Mac, because being able to
manage multiple processes is a real win from a developer's point of
view.  

Another big question is whether or not Multifinder uses the same
"virtual mac" approach to memory management.  If so, then it's just
like switcher again, if not, then we can get a lot more milage out of
it.

So, what's the poop folks?

Cheers from my new home, used to be CMU< now it's Dartmouth.

Pete

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From: su@dartvax.UUCP (Peter Su)
Newsgroups: comp.sys.mac
Subject: Multithoughts on multitasking
Message-ID: <6917@dartvax.UUCP>
Date: Fri, 21-Aug-87 22:42:16 EDT
Article-I.D.: dartvax.6917
Posted: Fri Aug 21 22:42:16 1987
Date-Received: Sun, 23-Aug-87 22:13:53 EDT
Reply-To: su@dartvax.UUCP (Peter Su)
Distribution: world
Organization: Dartmouth College, Hanover, NH
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