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- From: maynard@esther.msc.cornell.edu (Maynard J. Handley)
- Subject: Re: First Taligent Won't Run Existing Apps
- Message-ID: <1992Sep4.214449.16187@msc.cornell.edu>
- Keywords:
-
- Sender: news@msc.cornell.edu
- >: Oh, very clever. That convinces me *completely*.
- Organization: Cornell-Materials-Science-Center
- References: <ewright.715553413@convex.convex.com> <5275@tuegate.tue.nl>
- Date: Fri, 4 Sep 1992 21:44:49 GMT
- Lines: 37
-
- >
- >Well, I'm glad it does. Unix seems to work pretty well on
- >single-processors
- >too.
-
- I'm not going to take sides in this- there are lotsa neat things about
- pre-emptive multi-tasking. There are also some fairly high power computers
- types (Wirth and maybe Knuth) who feel that there are serious advantages to
- co-operative. I will take issue with your claim that UNIX works well for
- this sort of thing. Any painting or drawing program is a nightmare on UNIX-
- you just don't get the smooth flow and feel of a Mac. I don't know how well
- OS/2 handles this- anyone want to pipe up. It has also been my experience
- that on our RS/6000s (souped up 530s or higher with 100s of MB or RAM) one
- often has applications that just hang- everything stops for about 30
- seconds. I'v seen the same thing on SPARCs. Now this is certainly some
- complicated interaction of X, virtual memory and the scheduler. But the sum
- total of all code and data in the system is less than the real RAM, so the
- virtual memory failture is not really acceptable. And my Mac (also running
- virtual memory) never does this.
-
- Generally, although the mac is (often substantially) slower, response times
- are consistent, and psychologically this seems a lot more satisfying than
- the variation of UNIX. I think the simple scheduling algorithms developed
- for multi-user terminal type machines don't work well when one's major
- applications are photoshop, canvas and videoworks. Not to say that a decent
- algorithm couldn't be found, just that it's not simply a matter of taking
- the UNIX (or VMS or CMS or whatever) algorithm and just adding it to the
- Mac OS.
-
- A parallel might be in ICC. People wanted it for the mac, but the fact is
- that UNIX stream based ICC doesn't work well in the Mac environment of
- pictures, sounds, spreadsheets and such. Apple have given us a arther more
- complex model that took some time to develop, will take some more time in
- real use to iron the problems out, but which is better suited to the Mac
- way of computing.
-
- Maynard Handley
-