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11.01.2007 at 09:32AM PDT, ID: 22932729
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8.0

optimized code

Asked by nixfreak in Compilers for Software Development, C Programming Language, Algorithms

Tags:

I have 4 programs that use the same algorithm. The programs do all the calculations on a very small data set (smaller than data cache).
I bechmarked them on 2 different computers, one a "pentium4, 2.4GHZ, 16KB data and 1MB L2 cache" and another a "Centrino duo 1.73 GHZ".
2 programs run at exactly the same speed on both m/c but the other two programs run faster on the Centrino (20% and 50% less runtime resp.). What could be reason for this? I know my question is somewhat vague but I am hoping someone can offer some insight into this. (The programs are not multithreaded. All programs were compiled using gcc -O2. I also tried compiling them with sun studio compilers - still same behaviour.)Start Free Trial
[+][-]11.01.2007 at 09:34AM PDT, ID: 20194459

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[+][-]11.01.2007 at 10:23AM PDT, ID: 20194823

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[+][-]11.05.2007 at 01:23PM PST, ID: 20219633

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Zones: Compilers for Software Development, C Programming Language, Algorithms
Tags: optimized
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Solution Provided By: NovaDenizen
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[+][-]12.10.2007 at 08:40PM PST, ID: 20447338

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[+][-]01.07.2008 at 06:12AM PST, ID: 20599410

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