[gambit-list] High-performance compiler options

Alex Queiroz asandroq at gmail.com
Fri Oct 9 11:33:35 EDT 2009


Hallo,

On Wed, Oct 7, 2009 at 6:15 PM, Bradley Lucier <lucier at math.purdue.edu> wrote:
>
> the routine (direct-fft-recursive-4 a table) computed the final direct
> (forward) FFT with 2097152 complex elements in 156 ms.  This means that
> we were getting
>
>> (/ (* 5 2097152 21) .156)
> 1411544615.3846154
>
> FLOPS (because it takes $5 N \log_2 N$ floating-point operations for an
> FFT of size N).  So that's 1411 MFLOPS with a 2.33 GHz Core 2 Duo; FFTW
> reports about 2200 MFLOPS on a 3.0 GHz Xeon Core Duo using the Intel
> compiler icc here:
>

     1411 MFLOPS seems a lot but I am no expert. Does anybody can say
how many MFLOPS a current 3D real-time game needs?

Cheers,
-- 
-alex
http://www.ventonegro.org/


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