[gmx-users] Parallel FFTW performance

Erik Lindahl lindahl at csb.stanford.edu
Mon Oct 27 00:25:01 CET 2003

Oh, another thing:

You can increase the PME grid spacing (decreasing grid memory usage) if 
you also increase the interpolation order.

This is not smart for a single CPU (4th order and 0.12 seems to be a 
good balance), but for multiple CPUs it is better to use a higher 
interpolation order - you swap communication for calculation.



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