Comments on: CPU speed and FLOPS http://www.laialexander.com/2008/06/27/cpu-speed-and-flops/ Blogging about my life Wed, 07 Jan 2009 12:01:46 +0000 http://wordpress.org/?v=2.5 By: Lai Alexander http://www.laialexander.com/2008/06/27/cpu-speed-and-flops/#comment-757 Lai Alexander Mon, 20 Oct 2008 20:23:38 +0000 http://www.laialexander.com/?p=18#comment-757 Yeah, that sounds right. According to my calculations, it would have taken about 26 and a half hour to find out that the number was a prime. Keep in mind that this could be way off, because the number of FLOPS needed could be wrong. I will look into linpack some more, I think it might be differences on the various versions of the benchmarking program, which are optimised for different OS' and different CPU architectures. I think. Yeah, that sounds right. According to my calculations, it would have taken about 26 and a half hour to find out that the number was a prime. Keep in mind that this could be way off, because the number of FLOPS needed could be wrong.

I will look into linpack some more, I think it might be differences on the various versions of the benchmarking program, which are optimised for different OS’ and different CPU architectures. I think.

]]> By: Prasan http://www.laialexander.com/2008/06/27/cpu-speed-and-flops/#comment-756 Prasan Mon, 20 Oct 2008 01:32:52 +0000 http://www.laialexander.com/?p=18#comment-756 Yeah.. there are two types of test.. optimised and non-optimised.. If you read up more on them.. The optimization is done based on the type of CPU architecture you have.. I think the optimized results make more sense.. as that gives the true potential of the CPU.. Yeah.. there are two types of test.. optimised and non-optimised..
If you read up more on them.. The optimization is done based on the type of CPU architecture you have..
I think the optimized results make more sense.. as that gives the true potential of the CPU..

]]> By: Lai Alexander http://www.laialexander.com/2008/06/27/cpu-speed-and-flops/#comment-755 Lai Alexander Sun, 19 Oct 2008 23:52:30 +0000 http://www.laialexander.com/?p=18#comment-755 Thank you very much. This looks very interesteing. MFLOPS are megaFLOPS, right? I've had the program run a few times now, and the results are somewhat varying. I'll do some more tests to see if I can get better results. Now they are between 150 and 700 MFLOPS. Thanks again! Correction: The non-optimised shows about 150 MFLOPS and the optimised shows about 700 MFLOPS. Thank you very much. This looks very interesteing. MFLOPS are megaFLOPS, right?

I’ve had the program run a few times now, and the results are somewhat varying. I’ll do some more tests to see if I can get better results. Now they are between 150 and 700 MFLOPS.

Thanks again!

Correction: The non-optimised shows about 150 MFLOPS and the optimised shows about 700 MFLOPS.

]]> By: Prasan http://www.laialexander.com/2008/06/27/cpu-speed-and-flops/#comment-745 Prasan Mon, 22 Sep 2008 17:06:56 +0000 http://www.laialexander.com/?p=18#comment-745 Just came across your site. I was searching for a way to calculate FLOPS too.. I found out that the supercomputers are tested using something called linpack. http://www.netlib.org/linpack/ its uses fotran to calculate some linear equations in order to find out how many floating point calculations your CPU does. An easier way to do the same would be to download becnhnt.zip from: http://community.compuserve.com/n/pfx/forum.aspx?tsn=1&nav=messages&webtag=ws-pchardware&tid=159933&redirCnt=1 run the runall.bat file and after a few runs it would create a file called Linpack.txt check that to find out how many MFLOPS your CPU does. It gives you other benchmarks too, but if you want a universal way so you can compare it with other CPUs/copmuters check the linpack file. Just came across your site. I was searching for a way to calculate FLOPS too.. I found out that the supercomputers are tested using something called linpack.
http://www.netlib.org/linpack/
its uses fotran to calculate some linear equations in order to find out how many floating point calculations your CPU does.
An easier way to do the same would be to download becnhnt.zip from:
http://community.compuserve.com/n/pfx/forum.aspx?tsn=1&nav=messages&webtag=ws-pchardware&tid=159933&redirCnt=1

run the runall.bat file and after a few runs it would create a file called Linpack.txt
check that to find out how many MFLOPS your CPU does.
It gives you other benchmarks too, but if you want a universal way so you can compare it with other CPUs/copmuters check the linpack file.

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