Dear all

I have implemented the following two algorithms on my home Ethernet LAN containing 2/ and three heterogeneous devices using MPICH2.

Algorithm1:

1- Root process reads the contents of an input array.

2- It then sends the array data to all other processes.

3- All processes including the root process perform specific

computations on their array copies.

4- Once the computations within each process are finished,

the generated arrays are directly written by the process that

performed the computations to separate files.

Algorithm2:

Same as Algorithm 1 except step 2 is replace by:

2- Root process broadcast the array data to all other processes.

The implementation of both algorithms work fine and give the expected results but Algorithm2 that uses MIPI_Bcast is slower than Algorithm1 that uses MPI_Send

For my knowledge, MIPI_Bcast is faster than MPI_Send.

Please, would you guide me to know if there is any conflict of misunderstand.

Thanks a lot

Alaa