Article View: comp.sys.ibm.pc.misc
Article #7604Re: finding out MHz rate of processor (like norton 5.0 )
From: Adam Mirowski
Date: Tue, 12 Feb 1991 19:08
Date: Tue, 12 Feb 1991 19:08
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1478 bytes
In article <4833@ruuinf.cs.ruu.nl>, ajbanck@cs.ruu.nl (Arent Banck) writes: %% Looking at the norton utilities 5.0, I saw that it checked the %% freq. at wich the processor runs. %% Does anybody know if there is an easy way of finding this freq. %% And where I can find this. Also, does anybody know how nu is checking %% this frequency? You have to know how many clock ticks a given instruction takes, then repeat it many times, for example in a loop. There is a 838 nanoseconds-resolution timer in the PC which can be used to measure the spent time with precision. Then you divide the total number of clocks by the time spent and you get the frequency. In order to implement this efficiently, you also have to figure out how to minimize memory access during the loop. -- Adam Mirowski, mir@chorus.fr (FRANCE), tel. +33 (1) 30-64-82-00 or 74 Chorus systemes, 6, av.Gustave Eiffel, 78182 Saint-Quentin-en-Yvelines CEDEX
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arc1-ca.pugleaf.net!utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!sdd.hp.com!spool.mu.edu!uunet!mcsun!corton!chorus!mirReferences:
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!sdd.hp.com!spool.mu.edu!uunet!mcsun!corton!chorus!mir From: mir@chorus.fr (Adam Mirowski) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: finding out MHz rate of processor (like norton 5.0 ) Keywords: MHz speed processors norton Message-ID: <7850@chorus.fr> Date: 12 Feb 91 19:08:44 GMT References: <4833@ruuinf.cs.ruu.nl> Reply-To: mir@opera.chorus.fr (Adam Mirowski) Organization: Chorus systemes, Saint Quentin en Yvelines, France Lines: 17