I'm using mpif90 with Intel 10 fortran complier: % mpif90 -compile_info ifort -I/usr/mpi/qlogic//include/mpich/intel10/x86_64 -c -I/usr/mpi/qlogic//include
If I don't specify any compiler options, the compiler vectorises some loops: % mpif90 p-grains1.f90 p-grains1.f90(123): (col. 1) remark: LOOP WAS VECTORIZED. p-grains1.f90(250): (col. 35) remark: LOOP WAS VECTORIZED. Is loop vectorisation/unrolling safe for MPI logic? I presume it is, but are there situations where loop vectorisation could e.g. violate the order of execution of MPI calls? many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423
