Date: Wed, 5 Aug 92 12:13:01 -0500
From: rcharif AT math DOT utexas DOT edu
Posted-Date: Wed, 5 Aug 92 12:13:01 -0500
To: buers AT dg1 DOT chemie DOT uni-konstanz DOT de
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Paging enhancement for go32 v1.07
Reply-To: rcharif AT math DOT utexas DOT edu


    I had two random problems with Rami El Charif's version, which I
    can't explain. There happened one reboot during compilation and at
    one stage gcc (or better cpp) wasn't able to find the include-files 
    stdio.h etc. This was in the middle of a make, after some files

I didn't check for the code being modified. I went from the idea that
well behaved programs do not write code. But as DJ pointed out, this
might cause some problems with the library routine int86 in some
cases. I will patch what I did so that I check for modified code.  I
will post the patch and put them on math.utexas.edu in the next couple
of days.


    What I called "TOPLINEINFO-patch" is a small patch I sent some weeks
    ago to the list. If anybody wants it, I can send it again.
    The speed-up of Rami El Charif's patches is much better

I will include the TOPLINEINFO patch. Please resend it to me directly.


    (200 kB source-code, plain C, maximal size paged out during compiling
    about 700 kB).

Performance enhancement is proportional to the swap file size and
paging activity. I tried it with MAXIMA (5.5 Meg). The maximum swap
file size went down from 3 to 2.3 Megs and it was slightly faster.

I am working on another enhancement which will use a Not Used Recently
(NUR) page replacement. I will post it when it is ready.

Rami