Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!sun-barr!newstop!sun!joe!petolino
From: petolino@joe.Sun.COM (Joe Petolino)
Newsgroups: comp.arch
Subject: Re: RISC multiprocessors
Message-ID: <128287@sun.Eng.Sun.COM>
Date: 22 Nov 89 18:48:37 GMT
References: <13319@pur-ee.UUCP> <280004@hpdml93.HP.COM> <23963@cup.portal.com> <2118@cs-spool.calgary.UUCP>
Sender: news@sun.Eng.Sun.COM
Reply-To: petolino@sun.UUCP (Joe Petolino)
Organization: Sun Microsystems, Mountain View
Lines: 12

>> Plus, the R3000 cache is write-through, and a reasonable
>> multiprocessor system needs write-back caches. 

>As long as they are physical write back caches and not virtual. Unless you
>like flushing huge virtual writeback caches everytime you context switch
>and mapin your next process.

The solution to this problem is obvious: use the process ID (or something
smaller which maps to the process ID) as part of the Virtual Address tag.
People have been doing it for years.

-Joe