Path: utzoo!utgpu!water!watmath!clyde!att!pacbell!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!decwrl!labrea!sri-unix!garth!smryan
From: smryan@garth.UUCP (Steven Ryan)
Newsgroups: comp.arch
Subject: Re: Cray & Amdahl (Really: VM on vector processors) (Was: ...)
Message-ID: <1070@garth.UUCP>
Date: 23 Jul 88 22:35:02 GMT
References: <4232@cbmvax.UUCP> <76700035@p.cs.uiuc.edu> <12174@ames.arc.nasa.gov> <20839@beta.lanl.gov>
Reply-To: smryan@garth.UUCP (Steven Ryan)
Organization: INTERGRAPH (APD) -- Palo Alto, CA
Lines: 9

>The problem is that hardware VM isn't flexible enough to deal with a
>large variety of data usage patterns.  As a result, most VM machines
>just do some variant of demand paging.

VSOS on 205 provides an Q5ADVISE for an asynchronous swap in/swap out.
Pretty arcane, but its there.

The real battle is between a developement shop with lots of interactive jobs and
a production shop which is dedicated to one program.