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From: aeusesef@csun.UUCP (sean fagan)
Newsgroups: comp.arch
Subject: Re: MIPS ratings of old machines
Message-ID: <919@csun.UUCP>
Date: Mon, 23-Nov-87 12:13:16 EST
Article-I.D.: csun.919
Posted: Mon Nov 23 12:13:16 1987
Date-Received: Sat, 28-Nov-87 04:02:02 EST
References: <4839@elroy.Jpl.Nasa.Gov> <169@datapg.DataPg.MN.ORG> <563@mcrware.UUCP>
Reply-To: aeusesef@csun.UUCP (Sean Eric Fagan)
Organization: California State University, Northridge
Lines: 24
Keywords: CDC

[I would e-mail, but I seem to have lost the address]
In a previous article, somebody asked for MIPS ratings for old machines,
CDC machines included.
Based on personal experience, technical reference, and some extrapolation,
a CDC 170/174 gets (yes, we still have one) arount 1.3 MIPS (also the same
MFLOPS); add a second head and it gets around 2.1.
A 730 gets slightly lower than that number, around 1.1 and 1.8, whereas a
750 gets around 4.5 and (guessing here; don't actually have one to base
numbers on) 8.8, and a 760 (same as a 750, only faster RAM) gets around 6.0
and 11.7 (ditto on experience).
A 180/830 gets around 1.1 (like a 174) and 1.8.
Hope this has proven interresting to somebody.
BTW, although the 830 gets around the same MIPS as a VAX or two, personal
experience has proven that the 830 is quicker, due to a) incredibly quick
context switching times (a couple of microseconds), and b) a very efficient
I/O system.
Share and Enjoy.

 -----

 Sean Eric Fagan          Office of Computing/Communications Resources
 (213) 852 5742           Suite 2600
 1GTLSEF@CALSTATE.BITNET  5670 Wilshire Boulevard
                          Los Angeles, CA 90036
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