Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!mintaka!geech.gnu.ai.mit.edu!rjc From: rjc@geech.gnu.ai.mit.edu (Ray Cromwell) Newsgroups: comp.sys.amiga.advocacy Subject: Re: A NeXT Article(beware) Message-ID: <1991Jun12.202001.22613@mintaka.lcs.mit.edu> Date: 12 Jun 91 20:20:01 GMT References: <1991Jun12.190315.18622@mintaka.lcs.mit.edu> <1566@caslon.cs.arizona.edu> Sender: news@mintaka.lcs.mit.edu Organization: The Internet Lines: 33 In article <1566@caslon.cs.arizona.edu> dkoski@cs.arizona.edu (David A. Koski) writes: >From article <1991Jun12.190315.18622@mintaka.lcs.mit.edu>, by rjc@geech.gnu.ai.mit.edu (Ray Cromwell): >> Mike, don't compare CISC MIPS to RISC MIPS. Let's say RISC processor >> X is rated at 10x the MIPS of CISC processor Y, but a divide instruction >> takes 20 instructions on X and one instruction on Y. It seems to me >> that division is twice as slow on X. Show me the SpecMarks. > >Dumm dumm dumm. There are no such things as CISC MIPS and RISC MIPS. >Although the definition of MIPS is millions of instructions per second, >no one (except maybe those IBM dorks) uses them that way. For any >decent comparison you have to compare the work done, not the instructions >executed. Many times dhrystone will be used to get mips ratings by >comparing times to the vax 11/780 (a 'one mips machine'). Dumm? Perhaps you're too dumm to get the point. Don't compare MIPS, they are meaningless especially when trying to compare different archtectures. The phrase "don't compare cisc mips to risc mips" means "don't compare mips ratings of cisc processors to mips ratings of risc processors" not that there is seperate definitions for each architecture. >I have seen specmarks for the 88000 and it was faster than the 040, but I >don't think anyone has a 88110 yet. Sorry. But how much faster? I hardly think it is 10x faster as the original NeXToid tried to state. -- / INET:rjc@gnu.ai.mit.edu * // The opinions expressed here do not \ | INET:r_cromwe@upr2.clu.net | \X/ in any way reflect the views of my self.| \ UUCP:uunet!tnc!m0023 * /