Executing PALM on GPUs

Palm was first ported to GPUs in the course of its participation in the ​SPEC-ACCEL benchmark. This initial GPU-capable PALM version is r1257. A full GPU porting was conducted in the year 2016 and the source code is available here. A detailed discussion of the porting process and its outcome can be found in ​Knoop et al. (2016)

In order to compile PALM with e.g. the PGI 16.5 compiler for an NVidia Tesla GPU with CUDA 7.5 and OpenMPI 1.10.3, please use the following

• Preprocessor options: -Mpreprocess -DMPI_REAL=MPI_DOUBLE_PRECISION -DMPI_2REAL=MPI_2DOUBLE_PRECISION -D__parallel -D__nopointer -D__lc -D__cuda_fft
• Compiler flags: -fastsse -acc -ta=tesla -Minfo=acc -Mcuda
• Linker flags: -fastsse -acc -ta=tesla -Minfo=acc -Mcuda -lcufft

Don't forget to use the mpif90 wrapper of your MPI installation in order to correctly link your MPI libraries.