Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!mit-eddie!bbn!rochester!ur-tut!ur-valhalla!micropen!dave
From: dave@micropen (David F. Carlson)
Newsgroups: comp.arch
Subject: Re: VM needed for rapid startup
Summary: paging in a process
Keywords: paging virtual-memory speed
Message-ID: <495@micropen>
Date: 26 May 88 12:40:30 GMT
References: <463@cvaxa.sussex.ac.uk> <19322@beta.UUCP>
Organization: Micropen Dirent Writing Systems, Pittsford, NY
Lines: 19

In article <19322@beta.UUCP>, jlg@beta.UUCP (Jim Giles) writes:
> In article <463@cvaxa.sussex.ac.uk>, aarons@cvaxa.sussex.ac.uk (Aaron Sloman) writes:
> > [...]
> In any case, fast startup is a minor convenience.  The important thing is
> response time while running and turnaround for compute intensive jobs.
> To an extent, both of these requirements are incompatible with paging
> if the disk is VERY much slower than the CPU.  There are no easy answers
> here.

I seem to remember that in BSD 4.1 on the VAX that a process was demand paged
but in order to initialize the paging system the whole process needed to be
loaded into core.  Thus, the startup argument is specious.  
Is this correct or am I wrong as usual?

-- 
David F. Carlson, Micropen, Inc.
...!{ames|harvard|rutgers|topaz|...}!rochester!ur-valhalla!micropen!dave

"The faster I go, the behinder I get." --Lewis Carroll