Newsgroups: comp.windows.ms,connect.audit
Path: utzoo!utgpu!tj
From: tj@gpu.utcs.utoronto.ca (Terry Jones)
Subject: Re: Paging of non-windows applications
Message-ID: <1991May14.133439.16453@gpu.utcs.utoronto.ca>
Organization: UTCS Public Access
References: <1991May12.203857.9846@ibmpcug.co.uk>
Distribution: na
Date: Tue, 14 May 1991 13:34:39 GMT

>the application to run. Also the delays and disk accesses that can
>occur when switching between non-windows applications seems to
>indicate that the whole Virtual 8086 VM is swapped as one unit,
>either all in RAM or all swappped out.

I ran into an interesting example of this the other evening. It was a complex
affair where I had just installed a second adapter (mono) with my VGA and
in a DOS window I typed mode mono to go to the other screen. There I started
DOS Kermit and dialed a host and started a download. Swapped back to program
manager with Alt-Esc and things were fine. Transfer going fine, windows going
fine. I could load other applications like PaintBrush OK. Then I started WinGif
to look at a file. Things were fine until I did a File Open from WIngif. Kermit
and WinGif were trying to access the same disk (not same file). Kermit swapped
out. WIngif read some file. Kermit swapped in to write to disk, wingif stopped,
kermit swapped out, wingif did some more. Lets just say performance was not
quite what I am used to on this 386sx with 5 meg RAM! Disk was getting its
daily exercise.

I then repeated the experiment but this time I had Kermit download to a
floppy drive instead. No swapping. 

Any thoughts?