Scalability of the Poisson solvers - TDDFT.org
Scalability of the Poisson solvers - TDDFT.org
Scalability of the Poisson solvers - TDDFT.org
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Survey<br />
<strong>Poisson</strong> solver, Blue Gene/P<br />
Execution-times for <strong>the</strong> calculation <strong>of</strong> <strong>the</strong> Hartree potential created by a<br />
Gaussian charge distribution on a Blue Gene/P machine as a function <strong>of</strong><br />
six different <strong>Poisson</strong> <strong>solvers</strong> and <strong>of</strong> <strong>the</strong> involved number <strong>of</strong> MPI<br />
processes.<br />
1000<br />
t (s)<br />
100<br />
10<br />
1<br />
0.1<br />
0.01<br />
1 4 16 64 256 4096<br />
MPI proc.<br />
PFFT<br />
Serial FFT<br />
ISF<br />
CG corrected<br />
Multigrid<br />
FMM<br />
J. Alberdi-Rodriguez (UPV/EHU) <strong>Poisson</strong> solver in Octopus October 23 25 / 33
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