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From: ejp@icd.ab.com (Ed Prochak)
Newsgroups: comp.realtime
Subject: Re: My IBM rep says that the RS/6000/w AIX is realtime, is this true?
Message-ID: <1793@abvax.UUCP>
Date: 24 Aug 90 19:50:59 GMT
References: <4350@cica.cica.indiana.edu>
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Reply-To: ejp@icd.ab.com (Ed Prochak)
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In article <4350@cica.cica.indiana.edu>, ssw@cica.cica.indiana.edu
(Steve Wallace) writes:
> Our IBM rep is telling us that the RS/6000 running AIX will do
> realtime applications.  Specifically, the RS/6000 will be able to
> time user response time with a given accuracy.  The local IBM
> tech type says just adjusting the priority on the process will
> guaranty a maximum latency between an interrupt (keypress) and
> the process waking up and recording the time.
> 
> Does anyone know if the RS/6000 & AIX have this capabilities, or
> is IBM bluffing?
> 
> 
> Thanks,
> 
> Steven Wallace
> Indiana University
> wallaces@ucs.indiana.edu

What's the value for the maximum latency?
(milliseconds?  seconds?  minutes?)

Does the priority ever get readjusted by the OS?
(as I understand it, unix priorities may change
 to provide a "fair" distribution of cpu time)

Do you or the process have to have special (root)
privileges to change the priority to the value which
is associated with the guarantee?

I have never used AIX, so I'm just asking very
general questions here. Maybe someone else has
some answers??


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