Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!van-bc!rsoft!mindlink!a752
From: a752@mindlink.UUCP (Bruce Dunn)
Newsgroups: comp.windows.ms
Subject: Re: Performance degradation in 386 enhanced mode
Message-ID: <4496@mindlink.UUCP>
Date: 17 Jan 91 21:47:32 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 29

> dkyoon@pollux.usc.edu writes:
> 
> 
> The performance degradation in 386 enhanced mode is the result of
> multitasking of windows applications even a DOS app is running with
> exclusive box checked.  In standard mode, if a dos app is
> activated, all other apps including windows apps are suspended.
> However, in enhanced mode, windows apps are always able to get a
> time slice of CPU.  You can easily verify this by doing file transfer
> using one of the windows comm program (like winqvt), and focus on the
> DOS app which is supposed to be run exclusively.  You will see, the
> file transfer's going on in background.
> 
> I would appreciate any comments on my observation, and pealse correct
> me if I am wrong.
> 
> --
> Dae-kyun Yoon
> dkyoon@usc.edu, ..!uunet!usc!dkyoon


     I agree that multitasking puts more of a load on the processor, but this
is not an answer to the specific question being asked as this performance
degradation does not happen on certain machines.  I would expect 386 enhanced
mode to be slightly slower because of overhead, but not much slower unless
something were operating in the background, which is not the case in the
problems being described.
--
Bruce Dunn   Vancouver, Canada    a752@mindlink.UUCP