Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!usc!apple!sun-barr!newstop!exodus!exodus-bb!khb From: khb@chiba.Eng.Sun.COM (Keith Bierman - SPD Advanced Languages) Newsgroups: comp.arch Subject: Re: 64-bits Message-ID: Date: 23 Aug 90 01:55:43 GMT References: <9883@ganymede.inmos.co.uk> <1990Aug22.222045.8100@nlm.nih.gov> Sender: news@exodus.Eng.Sun.COM Organization: Sun MegaSystems Lines: 19 In-reply-to: usenet@nlm.nih.gov's message of 22 Aug 90 22:20:45 GMT In article <1990Aug22.222045.8100@nlm.nih.gov> usenet@nlm.nih.gov (usenet news poster) writes: .. This is not so far off. IBM will be glad to show you the space on the RS/6000 board where the fiber cable goes, and at least one company is marketting an add in board based on fiber optic links that will permit shared VM between heterologous processors. The software issues for the latter boggle my humble mind. Not the least of the problems is that the memory model is weakly ordered ... from even the CACHEs point of view. Only the CPU itself has the logic which enables the out of order stores to be viewed in the right order. -- ---------------------------------------------------------------- Keith H. Bierman kbierman@Eng.Sun.COM | khb@chiba.Eng.Sun.COM SMI 2550 Garcia 12-33 | (415 336 2648) Mountain View, CA 94043