Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!sun-barr!ccut!wnoc-tyo-news!ascwide!ascgw!fgw2!fgw!csgw!maiko!sakurai From: sakurai@gmd.ed.fujitsu.co.jp (SAKURAI atsushi) Newsgroups: comp.arch Subject: Re: CISC MIPS/MHz Again Message-ID: <291@maiko.ed.fujitsu.co.jp> Date: 21 May 91 07:19:49 GMT References: <1991May16.182143.15390@murdoch.acc.Virginia.EDU> Sender: news@ed.fujitsu.co.jp Organization: Fujitsu Ltd., Kawasaki, Japan Lines: 45 Nntp-Posting-Host: washi In article yuhara@kiko.stars.flab.fujitsu.co.jp (Masanobu Yuhara) writes: > > $B"((JIn <1991May16.182143.15390@murdoch.acc.Virginia.EDU> > clc5q@hemlock.cs.Virginia.EDU (Clark L. Coleman) said: > >Clark> The April 29, 1991 EE Times, page 16, mentions a 33-MHz TRON micro >Clark> from Fujitsu that supposedly runs at 32 MIPS. No benchmark explanation. >Clark> It is not intended for workstations, so we will probably never see It is for workstations, too:-) Unix is now running on the Gmicro/300 chip. >Clark> SPEC results for it, and it won't be sold in the U.S. But I am curious >Clark> to find out if anyone knows anything about the chip and the extremely >Clark> high ratio of 32 MIPS to 33 MHz for a CISC chip. > >The 33-MHz Gmicro/300 runs 57,625 Dhrystones/sec, if I remember correctly. >I guess its Dhrystone version is 1.1. Right, but >If you define one dhry-MIPS to be 1757 (as IBM does), you get 32.8 MIPS. Slitly different. The number 32 MIPS comes from 57,625 / 1800, otherwise you would get 33 MIPS. Originally, in article <1991May16.182143.15390@murdoch.acc.Virginia.EDU> clc5q@hemlock.cs.Virginia.EDU (Clark L. Coleman) writes: >Clever design or another meaningless "MIPS" claim? I think things are HALF/HALF. Thanks to its one-cycle-pipeline and Harvard-style cache organization, the Gmicro/300 executes even a complex instruction somewhat fast as Yuhara said. On the other hand, it never runs 32 Millions of Instructions Per Second literally. For 32 MIPS only means 32 VAX-MIPS, I would rather say it is not a Millions of Instructions Per Second but another Meaningless Instructions Per Second. So, you'd better wait the SPEC marks which will be announced by the maker. -- SAKURAI atsushi E-mail: sakurai@gmd.ed.fujitsu.co.jp