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 gibson:juliablog:kuramoto_sivashinksy [2017/07/09 06:39]gibson [The results] gibson:juliablog:kuramoto_sivashinksy [2017/07/09 07:30] (current)gibson Both sides previous revision Previous revision 2017/07/09 07:30 gibson 2017/07/09 06:39 gibson [The results] 2017/07/09 06:25 gibson [The results] 2017/07/09 06:23 gibson [The benchmark algorithm] 2017/07/09 06:22 gibson [The results] 2017/07/09 06:22 gibson [The benchmark algorithm] 2017/07/09 06:20 gibson [The results] 2017/07/09 06:16 gibson 2017/07/09 06:15 gibson [The results] 2017/07/09 06:10 gibson 2017/07/09 06:06 gibson 2017/07/09 06:04 gibson 2017/07/09 05:31 gibson 2017/07/08 12:12 gibson 2017/07/08 12:05 gibson created 2017/07/09 07:30 gibson 2017/07/09 06:39 gibson [The results] 2017/07/09 06:25 gibson [The results] 2017/07/09 06:23 gibson [The benchmark algorithm] 2017/07/09 06:22 gibson [The results] 2017/07/09 06:22 gibson [The benchmark algorithm] 2017/07/09 06:20 gibson [The results] 2017/07/09 06:16 gibson 2017/07/09 06:15 gibson [The results] 2017/07/09 06:10 gibson 2017/07/09 06:06 gibson 2017/07/09 06:04 gibson 2017/07/09 05:31 gibson 2017/07/08 12:12 gibson 2017/07/08 12:05 gibson created Line 22: Line 22: - **The left plot** shows execution time of 3200 time steps of the algorithm as a function of \$N_x\$, the number of gridpoints in the Fourier decomposition. The dominant cost of the algorithm should be the FFTs which should scale as \$N_x \log N_x\$. All the codes use FFTW libraries. + **The left plot** shows execution time of 3200 time steps of the algorithm as a function of \$N_x\$, the number of gridpoints in the Fourier decomposition. The dominant cost of the algorithm should be the FFTs, which should scale as \$N_x \log N_x\$. All the codes use the same FFTW libraries, so ideally, they should all collapse onto the same \$N_x \log N_x\$ line as linear and fixed-size overheads costs decrease relative to that. {{:​gibson:​juliablog:​cputime.png?​400|}} {{:​gibson:​juliablog:​timeloc.png?​400|}} {{:​gibson:​juliablog:​cputime.png?​400|}} {{:​gibson:​juliablog:​timeloc.png?​400|}} The right plot shows The right plot shows