time2 = SIMIX_get_clock();\
buf_out=time2-time1;\
smpi_mpi_reduce((void*)&buf_out,(void*)&buf_in, 1, MPI_DOUBLE, MPI_MAX, 0,comm );\
time2 = SIMIX_get_clock();\
buf_out=time2-time1;\
smpi_mpi_reduce((void*)&buf_out,(void*)&buf_in, 1, MPI_DOUBLE, MPI_MAX, 0,comm );\