Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!gatech!rutgers!ucsd!ucbvax!decwrl!sun!aeras!elxsi!beatnix!rw From: rw@beatnix.UUCP (Russell Williams) Newsgroups: comp.arch Subject: Re: Superoptimiser. Message-ID: <833@elxsi.UUCP> Date: 5 Jul 88 15:19:21 GMT References: <28200172@urbsdc> <2530@winchester.mips.COM> Sender: news@elxsi.UUCP Reply-To: rw@beatnix.UUCP (Russell Williams) Organization: ELXSI Super Computers, San Jose Lines: 17 In article <2530@winchester.mips.COM> mash@winchester.UUCP (John Mashey) writes: >360/91, of which maybe (on the order of) 20 were built; >there was also a 360/95 that was a little faster. >It is instructive to examine this, compared with, for example, the >360/85, which was built at aboutthe same time (late 60s). >The complexity of the 360/91 occurred because the CPU was too much faster >than the memories. >The 360/85 used a cache instead, was more cost-effective. Certainly >the later machines derive more from its ideas than from the 91. The 195 was basically a 91 with a cache. The 91 spent its time waiting on memory unless you did mostly FP. SLAC does, & a friend of mine there said that for her work, the 91 was much faster than the 3033. Russell Williams ..uunet!elxsi!rw ..ucbvax!sun!elxsi!rw