Re: dos functions behave differently under windows XP

From: Ivan Korotkov (koroNOSPAMtkov2_at_ztelDOT.ru)
Date: 06/14/04 

Date: Mon, 14 Jun 2004 16:53:09 +0000 (UTC)

> I've noticed that SOMETIMES, when I start cmd.exe, the processor
> goes into a 100% useage state. This is particularly true if I first run
> Programmers WorkBench ( PWB.EXE ) from the cmd.exe. Not
> only that, but it doesn't do this 100% of the time. It seems to start up
> after a certain set of programs are run, or if the computer hasn't been
> rebooted in a month. There seem to be some serious memory mgmt
> problems in XP that didn't exist inside of Windows 98. :-)

There are. XP has problems with app working sets vs. cache balancing and
nonpaged memory fragmentation. Once, after running without restart for
about a week, XP refused to allocate 8MB of contiguos memory (on a 512MB
machine!) for my driver. I can't believe that it happened due to lack of
nonpaged pool, since its usage was not greater than usually. But after
rebooting, everything worked OK.

> I've believe that XP is just as buggy or even buggier than the first
> version of Windows 95. Microsoft introduces new bugs with each
> update they provide, so it keeps getting buggier and buggier.

Say - the first version of Windows NT. It is what 2000 and XP inherit from.
But Windows 9x are much MORE buggier than all NTs together.

> I got around the 100% CPU useage last week by typing the
> following at the DOS prompt:

That's why when I start DOS programs, I usually set ntvdm.exe priority to
Low. 

-- 
Ivan

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