Provided by: mpich2-doc_1.4.1-1ubuntu1_all
MPI_Wtime - Returns an elapsed time on the calling processor
double MPI_Wtime( void )
Time in seconds since an arbitrary time in the past.
This is intended to be a high-resolution, elapsed (or wall) clock. See MPI_WTICK to determine the resolution of MPI_WTIME . If the attribute MPI_WTIME_IS_GLOBAL is defined and true, then the value is synchronized across all processes in MPI_COMM_WORLD .
NOTES FOR FORTRAN
This is a function, declared as DOUBLE PRECISION MPI_WTIME() in Fortran.
also: MPI_Wtick, MPI_Comm_get_attr, MPI_Attr_get
wtime.c 11/6/2008 MPI_Wtime(3)