Martin Seigert requested this one. It is a timed parallel FFT built on the MPI parallel fftw library. This was run under MPI-LAM (like Doug Eadline's Nasa Parallel Benchmark elsewhere on this page). Martin sent me numbers for dual PIII 500's for comparison. The Athlon seems to scale very closely with CPU clock relative to the Intel on this test, at least so far, winning by a nose (28.02/10.62 = 2.64 vs 1200/500 = 2.4).
19574 ./fftw_mpi_test running on n0 (o) 19575 ./fftw_mpi_test running on n0 (o) cpu-time: 10.623836 cpu-time: 10.623842 Compare to: dual PIII/500 w 256MB of RAM: 28.02
19577 ./fftw_mpi_test running on n0 (o) 19578 ./fftw_mpi_test running on n0 (o) cpu-time: 12.532397 cpu-time: 12.533482
19580 ./fftw_mpi_test running on n0 (o) 19581 ./fftw_mpi_test running on n0 (o) cpu-time: 15.586125 cpu-time: 15.583155