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From: jet@karazm.math.uh.edu ("J. Eric Townsend")
Newsgroups: comp.parallel
Subject: Re: Question: Ratio of communication to calculation time
Message-ID: <1991Apr18.175032.9755@menudo.uh.edu>
Date: 18 Apr 91 17:50:32 GMT
References: <1991Apr11.190317.23509@hubcap.clemson.edu> <1991Apr13.075558.17444@irisa.fr>
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>From article <1991Apr11.190317.23509@hubcap.clemson.edu>, by sharieh@bind.cs.fsu.edu (a sharieh):
>             T_cal to be the time to do one floating point operations such as
>                   a=b*c or a=b+c,

The i860 can do a single precision  operation per cycle, and operates
at 40Mhz.  In double precision, it can do an add in one cycle and
a multiply in two.  If you have twice as many adds as mults, then
you could see a peak of 60MFLOPS.  Intel claims to have hand coded some
stuff up (LOOCS) to 32MFLOPS or so.

--
J. Eric Townsend - jet@uh.edu - bitnet: jet@UHOU - vox: (713) 749-2120
Skate UNIX or bleed, boyo...
(UNIX is a trademark of Unix Systems Laboratories).

-- 
=========================== MODERATOR ==============================
Steve Stevenson                            {steve,fpst}@hubcap.clemson.edu
Department of Computer Science,            comp.parallel
Clemson University, Clemson, SC 29634-1906 (803)656-5880.mabell