[Pw_forum] Efficient parallelization
proffess at yandex.ru
Tue Mar 29 19:14:57 CEST 2005
Dear PWscf authors and users,
I want to use efficiently pwscf code during the run, i.g. to use both k-point and G-parallelizations (reduce memory and speed up, if possible).
For example, I have 4k-points and the next FFT mesh:
FFT grid: ( 60,264,264)
smooth grid: ( 44,192,192)
I see that for G-level I can use only 24 processors. I also can use this number of cpus for k-points:
mpirun -np 24 ./pw.x -npool -in file.inp
I see at output:
Number of processors in use: 24
K-points division: npool = 4
R & G space division: nprocp = 6
I see for k-points parallization everything is OK. But Is everything OK for G-parallelization?
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