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From: gwu@vlsi.cs.cmu.edu (George Wu)
Newsgroups: comp.arch
Subject: Re: Software Page Table Machines
Message-ID: <1057@vlsi.cs.cmu.edu>
Date: Wed, 20-May-87 09:04:06 EDT
Article-I.D.: vlsi.1057
Posted: Wed May 20 09:04:06 1987
Date-Received: Sat, 6-Jun-87 12:03:20 EDT
References: <1968@husc6.UUCP> <668@stride.Stride.COM> <401@gumby.UUCP>
Organization: Carnegie-Mellon University, CS/RI
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Concerning the discussion about pre process disk optimizations:

     I'm not sure whether this was a Berkeley call or something Sun did, but I
remember a long time ago in a Sun-2 manual that there was a system call which
told the system how you expected to access your data. There were three
different "modes:" the system default, some sort of number-of-accesses based
algorithm; sequential access; and completely random access.

     I presume this was all to allow the system to determine what page(s) was
best to swap out. And it would all have to be per process.

							George