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Date:	Sun, 30 Apr 2000 11:11:01 PST
From:	"Steven Levine" <steve53@earthlink.net >
Reply-To:	scoug-programming@scoug.com
To:	scoug-programming@scoug.com
Subject:	SCOUG-Programming: OS/2 as real-time OS ?

In <390C7A79.62DA@peterskye.com>, on 04/30/00
at 10:25 AM, Peter Skye said:

>At the last Programming SIG there was a brief mention that OS/2 is not a
>real-time operating system (hi Bob Blair). During the ensuing lunch,
>QNX was mentioned as an example of a real-time operating system (hi Terry
>Warren).

>I'd be interested in using some of the next SIG meeting's time for a
>discussion of what needs to be done to set up OS/2 for real-time usage.
>I see this more as a round-table discussion than a presentation.

Sounds interesting.

One thing to keep in mind, is real-time is a performance requirement, not
an OS component. I would consider OS/2 good for what I call soft
real-time jobs where response times in the 1 mSec range are sufficient.
From what I remember of my QNX work, I would put QNX in the same class.
Hard real-time, for me, is when you start looking a sub 100 uSec response
times.

Also, you can always achieve reduced response time by doing more work in
the interrupt handlers, or in the case of OS/2, using context hooks.

Steven

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"Steven Levine" MR2/ICE 2.19z #10183 Warp4/FP11
www.scoug.com irc.webbnet.org #scoug (Mon 7pm PST)
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