MPICH for SCI-connected Clusters

MPICH is the most commonly used, freely available implementation of the MPI-1 standard including parts of the MPI- 2 standard. It is available for nearly every Unix-based system and can use a variety of communication facilities through its low-level Abstract Device Interface (ADI-2). However, no adaption to the Scalable Coherent Interface (SCI) existed so far. This paper pre- sents the design and implementation of such an adaption consisting of an ADI-2 device for the current MPICH distribution. The per- formance of this device is compared to other ADI-2 devices of MPICH usable on Intel x86 based clusters and also with a commer- cial MPI implementation for SCI-connected clusters.