Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!umich!yale!think!snorkelwacker!apple!vsi1!wyse!mips!winchester!mash From: mash@mips.COM (John Mashey) Newsgroups: comp.sys.dec Subject: Re: Can a DECstation replace a 11/750 ? Message-ID: <38523@mips.mips.COM> Date: 4 May 90 19:36:00 GMT References: <36119@prls.UUCP> <5070@hub.ucsb.edu> <1990May4.025422.8656@spock.UUCP> <373@gca.UUCP> Sender: news@mips.COM Reply-To: mash@mips.COM (John Mashey) Distribution: usa Organization: MIPS Computer Systems, Inc. Lines: 23 From the currently best available SPEC benchmarks: The DS 3100 is: 11.8X faster than VAX-11/780 on 4 SPEC integer (geometric mean) 10.9X faster ... on 6 SPEC FP 11.3X faster on the entire 10-benchmark mix (SPECmark) These programs have little I/O or kernel time, os these are CPU benchmarks. The least ratio is 9.5 (spice) and the greatest is 13.2 (nasa7). The Sun SS1+ has a published SPECmark of 10.0; I don't havethe individual numbers, but I'd expect it to be about equal on integer, and somewhat slower on FP. (Based on clock ratios from SS1). The benchmarks are big enough to thrash the caches around at least some; which gives the 780 a fairer break. [Small benchmarks fit in most RISC caches, and so they go faster than a VAX relative to how they do on more realistic ones.] -- -john mashey DISCLAIMER: UUCP: mash@mips.com OR {ames,decwrl,prls,pyramid}!mips!mash DDD: 408-524-7015 or 408-720-1700 USPS: MIPS Computer Systems, 930 E. Arques, Sunnyvale, CA 94086