Abstract : This report introduces a version of MPICH handling efficiently different networks simultaneously. The core of the implementation relies on a device called ch_mad~which is based on a generic multiprotocol communication library called Madeleine. The performance achieved with tested networks such as Fast-Ethernet, Scalable Coherent Interface or Myrinet is very good. Indeed, this multi-protocol version of MPICH generally outperforms other free or commercial implementations of MPI.
