Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!mit-eddie!uw-beaver!ubc-cs!alberta!atha!willis
From: willis@cs.AthabascaU.CA (Tony Willis)
Newsgroups: comp.sys.dec
Subject: Re: Question regarding DS3100 Floating Point
Summary: 1.5 Mflop sp, 1 Mflop dp
Keywords: FP coprocessor
Message-ID: <1662@atha.AthabascaU.CA>
Date: 15 Feb 90 03:03:31 GMT
References: <Feb.12.10.17.01.1990.23389@paul.rutgers.edu> <119@hammer.UUCP> <1990Feb14.000213.6413@lavaca.uh.edu>
Organization: Athabasca University
Lines: 22

In article <1990Feb14.000213.6413@lavaca.uh.edu>, jet@karazm.math.uh.edu (J. Eric Townsend) writes:
> In article <119@hammer.UUCP> jockc@idsila.com (Jock Cooper) writes:
> >I have this ray tracing toy that runs faster on our MicroVax 
> >(has FP coprocessor) than on my DECstation 3100. Does the 3100 
> >have a Floating Point chip or what? Or is it an option?
> 
> 
> Another question.  Using a Fortran compiled executables in double precision
> are more than 5 times as slow as single precsion...
> 
> etc.


Well, I've run the linpack benchmarks on my DECstation 3100;
in single precision its about a 1.5 MFLOP machine and
in double precision its about 1 MFLOP.


Tony Willis

BITNET: twillis@nrcdra.bitnet
CDNNET: twillis@drao.nrc.ca, or willis@cs.athabasacau.ca