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Article #2590Re: AT&T MIPS claim
From: Daniel R. Levy
Date: Sat, 07 Jun 1986 16:41
Date: Sat, 07 Jun 1986 16:41
28 lines
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2170 bytes
In article <266@comm.UUCP>, dave@comm.UUCP (Dave Brownell) writes:
>In article <577@scirtp.UUCP> dfh@scirtp.UUCP (David F. Hinnant) writes:
>> ... They made this interesting claim that the UNIX PC gives
>> you "75% of the power of a VAX 11/780" for "only 7% of the cost".
>> Arrgh. ... Is this the MIP rating for the
>> 68010 as compared to the VAX? Looks like it. One really couldn't ask
>> for a better example of the Meaningless Index of Performance. I've seen
>> many a 780 run with more than 20 users. I'd like to see you put that
>> many on a UNIX PC that I found can barely support one.
>This is Apples and Oranges ... a MIP, however meaningless, is a CPU benchmark,
>and a "user" is a rather ill-defined I/O benchmark ... and I do believe
>the I/O on the 7300 is not up to the CPU. Maybe when someone comes up
>with a realistic I/O benchmark we can really start comparing UNIX hardware.
>(Yes, that marketing claim is absurd.)
> Dave Brownell
> EnMasse Computer Corporation
> {genrad,harvard}!enmasse!comm!dave
It only appears absurd to those who take it to mean what it doesn't mean.
The CPU does have that much 'crunch power'. I/O is a separate animal.
--
------------------------------- Disclaimer: The views contained herein are
| dan levy | yvel nad | my own and are not at all those of my em-
| an engihacker @ | ployer or the administrator of any computer
| at&t computer systems division | upon which I may hack.
| skokie, illinois |
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbosgd!ihnp4!ltuxa!ttrdc!levy From: levy@ttrdc.UUCP (Daniel R. Levy) Newsgroups: net.arch,net.micro.att Subject: Re: AT&T MIPS claim Message-ID: <928@ttrdc.UUCP> Date: Sat, 7-Jun-86 12:41:23 EDT Article-I.D.: ttrdc.928 Posted: Sat Jun 7 12:41:23 1986 Date-Received: Sun, 8-Jun-86 05:22:43 EDT References: <577@scirtp.UUCP> <266@comm.UUCP> Distribution: net Organization: AT&T, Computer Systems Division, Skokie, IL Lines: 28