Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!teddy!panda!talcott!harvard!seismo!brl-tgr!tgr!young@AMES-NAS.ARPA From: Bruce YoungNewsgroups: net.unix Subject: Re: info on array processors wanted Message-ID: <7469@brl-tgr.ARPA> Date: Thu, 17-Jan-85 11:56:20 EST Article-I.D.: brl-tgr.7469 Posted: Thu Jan 17 11:56:20 1985 Date-Received: Sun, 20-Jan-85 06:17:22 EST Sender: news@brl-tgr.ARPA Organization: Ballistic Research Lab Lines: 17 Developing array processors: CRAY 2 AMES will have (late FY85) a CRAY X-MP 1/2 running under UNIX. However, do not expect a commercial version of UNIX for CRAY until FY86. Using SLAM from P&A, we benchmarked two VAX 11/780's under UNIX a CRAY X-MP 2/2 and a CRAY X-MP 1/2 both running COS. The CRAYs demonstrated wall time improvements about 50 to 1. Thus a model running 4 hours on VAX loaded to factor 5.0 (using ruptime) will run on a CRAY in approximately 5 minutes. One disclaimer is any comparison of VAX to CRAY is full of assumptions about load averages, operating systems, configurations, yet we are pleased with the CRAY performance. Bruce young@AMES-NAS.ARPA