Path: utzoo!attcan!uunet!lll-winken!brutus.cs.uiuc.edu!rpi!batcomputer!thompson From: thompson@batcomputer.tn.cornell.edu (Steve Thompson) Newsgroups: comp.sys.dec Subject: Re: Question regarding DS3100 Floating Point Keywords: FP coprocessor Message-ID: <9711@batcomputer.tn.cornell.edu> Date: 13 Feb 90 19:28:17 GMT References: <119@hammer.UUCP> Reply-To: thompson@tcgould.tn.cornell.edu (Steve Thompson) Organization: Cornell Theory Center, Cornell University, Ithaca NY Lines: 15 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? Well, I have two main applications that I run on a VAXstation 3100 and a DECstation 3100, using the SAME source code in both cases (it's fortran). They are a Monte Carlo and a Molecular Dynamics simulation of a fluid stucture. The MC code is 10% faster on the VAXstation than on the DECstation, and the MD code is 4 times faster on the DECstation. For both programs, the VAXstation (VMS) compiles about 7 times faster than the DECstation (yes, 7). Steve