User Maual of FFTK
cd fftk/trunk CXX=mpicxx cmake . -DCMAKE_INSTALL_PREFIX=$HOME/local make install
CMake supports the following options
-DREAL=FLOAT – It will treats Real as FLOAT
-DCMAKE_INSTALL_PREFIX – Installation Folder
-DFIND_LIBRARIES=OFF – It will not try fo find Blitz++ and FFTW library
-DENABLE_THREAD=TRUE – Enable OpenMP threads for computing local FFT
-DFFTW_PLAN=PATIENT – It can be one of ESTIMATE, MEASURE, PATIENT, EXHAUSTIVE
mpirun -np 4 ./test_fftk basis sincos_option Nx Ny Nz iter [rows]
mpirun -np 4 ./test_fftk SSS SCC 32 32 32 10 2
basis – One of FFF, SFF, SSF, SSS.
Here F reprasents Fourier Transform, and
S represents Sinusoidal Transform
basis_option – It says whether Sicusoidal is Sin or Cos
For basis = FFF, it can only be FFF.
For basis = SFF, it can be SFF or CFF.
For basis = SSF, it can be SSF, SCF, CSF, CCF.
For basis = SSS, it can be SSS, SSC, SCS, SCC, … .
Nx, Ny, Nz – The grid size. For 2D use Ny = 1
iter – Number of pair of transforms to perform
rows – Number of Rows in a pencil division.
rows = 1 if numprocs < Nx
rows = numprocs / Nx is numprocs>Nx
For pencil division this assertion must hold:
(Nx%cols == 0) and (Ny%cols == 0) and (Ny%rows == 0) and (Nz%rows == 0)
where cols = numprocs/rows.
Download : Download FFTK library from here