RE: [CAD_CAM_EDM_DRO] Re: Multitasking

-----Original Message-----
From: Ken Jenkins [mailto:kjenkins@...]
Sent: Monday, October 16, 2000 12:55 PM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Multitasking


I don't know exactly what "realtime" means in that nothing
happens "instantaneously" ... even a nanosecond takes a
little time to happen :-) however if we're talking
multitasking .. I think the old Amiga had multitasking
even way-back-when didn't it?
[Eric Keller] There is pre-emptive multitasking and non-pre-emptive
multitasking, which are significantly different.
In non-preemptive multitasking, the programs have to cooperate, in
preemptive the scheduler yanks the plug
when the current task has run for x long, generally known
as the quantum. My definition of real time is simple:
if it runs fast enough that my hydraulics don't smash anything, it is
real-time. Lets just say that i know first
hand that window nt is not real time and leave it at that.
eric




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