[Nottingham] CPU and Memory benchmark programs

[Martin]

Interesting... But what are the multiple indexes listed below?

Also, memtest86 gives an estimate of memory bandwidth for your hardware 
to compare against any software benchmark figures.

Regards,
Martin

(Deliberately top posted!)



Robert Davies wrote:

> Doing some experimentation comparing CPUs, compilers and optimisation 
> options.  Surprisingly there seem to be few choices of CPU & Memory benchmark 
> programs around, I've used one called nbench (byte benchmarks) and a program 
> callled MemSpeed which shows nicely effect of cache sizes.
> 
> Any body got any suggestions for any better benchmark programs, apart from 
> the obvious kernel compile?  Maybe I've missed the obvious?
> 
> 
> Anyway FWIW, it would appear that the Gentoo optimised compile can bring 
> decent speed ups on CPU bound stuff on i686 (and actually would expect Athlon 
> and P4 to show greater effects though those systems should be comparatively 
> more I/O bound than PII / Celeron ones).  I'm actually rather surprised by 
> the improvement shown by gcc-3.2 over 2.95, and also the comparatively larger 
> effect of -march= options in gcc-3.   The IDEA values were showing 50% 
> improvement, which would suggest it's well worth the effort, for things like 
> gzip / zlib, bzip2, ssh etc.  There's a significant improvment over 
> -march=pentium options which was no better than portable i386 code on a i686 
> core CPU.
> 
> C compiler          : gcc version 3.2
> OPTFLAGS :  -O3 -fomit-frame-pointer
> libc                : ld-2.2.5.so
> INTEGER INDEX       : 7.692
> FLOATING-POINT INDEX: 7.020
> MEMORY INDEX        : 2.261
> INTEGER INDEX       : 1.697
> FLOATING-POINT INDEX: 3.893
> 
> C compiler          : gcc version 2.95.3 20010315 (SuSE)
> OPTFLAGS :  -O3 -fomit-frame-pointer -arch=i686
> libc                : ld-2.2.4.so
> INTEGER INDEX       : 8.221
> FLOATING-POINT INDEX: 6.712
> MEMORY INDEX        : 1.992
> INTEGER INDEX       : 2.097
> FLOATING-POINT INDEX: 3.723
> 
> INTEGER INDEX       : 9.564
> FLOATING-POINT INDEX: 7.084
> 
> 
> C compiler          : gcc version 3.2
> OPTFLAGS :  -O3 -fomit-frame-pointer -arch=pentium2
> libc                : ld-2.2.5.so
> INTEGER INDEX       : 9.564
> FLOATING-POINT INDEX: 7.084
> MEMORY INDEX        : 2.243
> INTEGER INDEX       : 2.500
> FLOATING-POINT INDEX: 3.929
> 
> Rob


-- 
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Martin Lomas
martin@ml1.co.uk
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