Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!psuvax1!psuvm!auvm!giampal
From: GIAMPAL@auvm.auvm.edu
Newsgroups: comp.sys.amiga.tech
Subject: Scheduler changed under 2.0?
Message-ID: <90312.082534GIAMPAL@auvm.auvm.edu>
Date: 8 Nov 90 13:25:34 GMT
Organization: The American University - University Computing Center
Lines: 27

I've got a semi-simple question about the Scheduler and LoadSeg() under
2.0 of AmigaDOS.

There seems to be a difference in the way the system handles a heavy load
between 2.0 and 1.3 of the OS.  For example, on an A3000, if you start a ray-
trace with TurboSilver and pop back to workbench to start up something like
DeluxePaint, the entire system _seems_ locked, but then suddenly jumps back
to life in little bursts.  However, under 1.3 (on the same physical machine),
there is no noticeable delay, and DeluxePaint (or anything for that matter)
comes up just fine with no delays or jumps in performance (i.e. things run
smoother).  This type of performance also appears when just doing things like
opening an icon on workbench or running other programs.

Simply from looking at how things work (and without an 030 disassembler) it
appears that either the scheduler has been changed or things like LoadSeg()
are quite different.  For the most part it looks like system calls are
what cause hold ups under 2.0.  When DPaint opens its initial screen there are
delays of about 1-2 seconds as it opens, whereas under 1.3 of the OS the
screen opens instantly.

I'm curious to know what the differences are (without spilling _all_ the
beans of course :-)  Does anyone have a clue on this one?



trying for good techie content,
--dominic