Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.arch
Subject: Re: ~8-job "knee" in response curves on Suns (was Re: IBM RS6000)
Message-ID: <5289@auspex.auspex.com>
Date: 16 Jan 91 18:13:17 GMT
References: <amos.663857722@shum> <5257@auspex.auspex.com> <DERAADT.91Jan15145940@fsa.cpsc.ucalgary.ca>
Organization: Auspex Systems, Santa Clara
Lines: 11

>3/80 and 3/4xx have 030 in them, but the Sun MMU is used. The motorola
>MMU is never enabled.

Wrong.  The 68030-based Suns do not *HAVE* a Sun MMU on board, except
perhaps for the "I/O MMU", which shadows the 68030 MMU in order to fake
DVMA.  Take a look at "/usr/include/sun3x/vm_hat.h" sometime....

>All Sun4 hardware has at least 16. Sun4/4x0 have 64.

Yes, but note that the SS1 has only 8 (it's Sun-4c hardware, not Sun-4
hardware).