Multi-thread on iris

[Mike Goss]

> Date: Thu, 31 Jan 91 10:35:02 EST
> From: "Dan Karron (karron at nyu.edu" <karron at karron.med.nyu.edu>
> .
> .
> .
> In fact, with one cpu is it easier to multi-thread because you
> have 0 probability of collision enforced by the scheduler !

Not true!  Although things can't really happen simultaneously,
the wonders of preemptive scheduling mean that a process can
be interrupted at any time (unless it has a non-degrading
priority or some such thing), another process can be run
which accesses the same data, and then the original process
restored without knowing it was ever interrupted.
The effect is that collisions are possible, although
a bit less likely than on a multi-processor system.
------------------------------
Mike Goss
Merit Technology Inc.
(214)733-7018
goss at snow-white.merit-tech.com

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