This is an example to make Cloverleaf on a Cray machine:
make COMPILER=CRAY NV_ARCH=FERMI -j 6 C_MPI_COMPILER=cc MPI_COMPILER=ftn
- COMPILER is the same as with the other implementations.
- NV_ARCH is the architecture - FERMI or KEPLER only, must be specified because of memory limitations of shared memory when doing reductions.
- Job number only affects parallel build of CUDA files
- (C_)MPI_COMPILER affects which compiler to use
To pay attention to the cuda_device variable in clover.in pass -D MANUALLY_CHOOSE_GPU into the NV_OPTIONS variable - ie:
make NV_OPTIONS="-DMANUALLY_CHOOSE_GPU" COMPILER=....
Device selection works differently on different machines, depending on the number of GPUs in the system and whether they are set to exclusive mode - try with and without if it doesn't work.