on using RDTSC

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2 total messages Started by William Meyer Mon, 17 Mar 2003 17:25

#634

Author: William Meyer
Date: Mon, 17 Mar 2003 17:25

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Does anyone here make use of RDTSC for timing? If so, did you use JNI
to gain access to it, or is there a downloadable tool for the purpose?

-- 
Bill

Politics -- the gentle art of getting votes from the poor and campaign
funds from the rich by promising to protect each from the other.  --
Oscar Ameringer

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Re: on using RDTSC

#636

Author: Owen Green
Date: Wed, 19 Mar 2003 17:15

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In article <3e760519$1@newsgroups.borland.com>, bill_meyer@earthlink.net 
says...
> Does anyone here make use of RDTSC for timing? If so, did you use JNI
> to gain access to it, or is there a downloadable tool for the purpose?

I haven't, and I don't know of any tools, but here's an article which 
features some JNI that makes a call to RDTSC: 

http://www.codeproject.com/cpp/IntegratingCPPJava.asp

It's worth bearing in mind that JNI itself will add some overhead, which 
may be worth taking into account, and also that you'd probably have to 
make sure you're running on an appropriate processor :) 

Also, if it's of any use, there are some Delphi conversions of the JNI 
headers at JEDI, if that's preferable to C++. 

--
Owen

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