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- Path: sparky!uunet!elroy.jpl.nasa.gov!decwrl!atha!aupair.cs.athabascau.ca!rwa
- From: rwa@aupair.cs.athabascau.ca (Ross Alexander)
- Newsgroups: comp.sys.atari.st
- Subject: Re: Some realism in the flame wars, please!
- Message-ID: <rwa.727736721@aupair.cs.athabascau.ca>
- Date: 22 Jan 93 21:05:21 GMT
- References: <727299604.AA01101@contrast.wlink.nl> <1jdi6vINN57c@golem.wcc.govt.nz>
- Sender: news@cs.athabascau.ca
- Lines: 42
-
- wells_s@kosmos.wcc.govt.nz (Steve Wells) writes:
-
- >OS/2 does NOT HAVE 'TRUE' multitasking!
- >Multi-tasking is running 2 or more processes AT THE EXACT SAME TIME!
- >You can't do this without a chip to do it, or without halving the
- >speed of the machine for each extra process! (e.g. every program
- >you wish to multi-task!)
-
- This is a use of the term `multi-tasking' with which I was not
- previously acquainted. In fact, the entire field of Computing Science
- is not aquainted with it. You are describing multi-processing. Have
- you considered taking a few CS courses? Just basic survey courses
- would be helpful, by the sound of your posts. They're easy credits;
- you know, `hacks for jocks' (apologies to geology's `rocks for
- jocks' courses).
-
- BTW, multiprocessing with heterogenous processors is generally not
- much good in general purpose computing environments. It gets too
- difficult to optimally distribute the threads of a job when they're
- architecturally dependant. All the really whizzy multi-processors
- are homogenous; for instance, big Crays and the Connection Machines.
-
- Now as regards the claim that the DSP chip is a big performance
- enhancement -
-
- The idea that you can get big gains *in the general case* from
- specialized hardware is often referred to as "Pike's Inequality", and
- has been tried (and subsequently abandoned) repeatedly in the history
- of computing. Spending the transistor budget on the CPU(s) always
- seems to win out. Come on over and lurk in comp.arch to get a feel
- for the issues.
-
- On the other hand, I cheerfully agree that special-purpose machines
- (simulators, controllers, dsp's, games boxes, & c) can get useful boosts
- by optimizing their architecture for a restricted problem domain.
-
- regards,
- Ross
-
- --
- Ross Alexander rwa@cs.athabascau.ca (403) 675 6311 ve6pdq@nebulus.ampr.ab.ca
- "All television is children's television." -- Richard P. Adler
-