Article View: comp.sys.ibm.pc.misc
Article #6502Re: Strange problem with Landmark speed test
From: Dave Levenson
Date: Sun, 30 Dec 1990 05:30
Date: Sun, 30 Dec 1990 05:30
23 lines
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1677 bytes
In article <5157@husc6.harvard.edu>, albert@endor.uucp (David Albert) writes:
> I'm running MS-DOS 4.01 on a 25Mhz AMI '386. When I run the Landmark
> cpu-speed test (the one with the bar that graphically compares the
> speed of the processor to the speed of a 4.77Mhz PC and a 6Mhz AT)
> the value I get depends on how many TSRs are loaded -- but not
> monotonically. The value I get is either 25 (approx) or 17 (approx)
> and changes from one to the other as I load TSRs. Some TSRs cause
> the change, some don't. Any idea what's going on?
I would guess that one or more of your TSRs is hooking the clock
interrupt, and stealing some of your CPU time on every tick. I
think this interrupt occurs about 18,000 times per second, so even
if the TSR is only looking at its work queue and deciding to do
nothing, it does a lot of that. I'm not familiar with the internals
of the Landmark test, but it may use the clock-tick itself, and
there may be some contention for it.
--
Dave Levenson Internet: dave@westmark.com
Westmark, Inc. UUCP: {uunet | rutgers | att}!westmark!dave
Warren, NJ, USA AT&T Mail: !westmark!dave
[The Man in the Mooney] Voice: 908 647 0900 Fax: 908 647 6857
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sdd.hp.com!news.cs.indiana.edu!att!att!westmark!dave From: dave@westmark.WESTMARK.COM (Dave Levenson) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: Strange problem with Landmark speed test Message-ID: <2200@westmark.WESTMARK.COM> Date: 30 Dec 90 05:30:30 GMT References: <5157@husc6.harvard.edu> Organization: Westmark, Inc., Warren, NJ, USA Lines: 23