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This summary provides insights into the AMMPI implementation of MPI version 1.1, highlighting its trivial porting capabilities across various platforms. AMMPI is known for delivering high performance, thanks to vendor-specific tuning, and is compatible with systems like Linux/Myrinet, MPICH, IBM SP3, and Cray T3E. Built on the AMUDP codebase, it features robust error reporting, non-blocking communication, and a performance monitoring API. This overview underscores its strengths and considerations regarding latency and bandwidth performance.
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AMMPI - Summary • Active Messages–2 (AM) implementation over MPI version 1.1 • Porting is trivial - works on virtually any platform that has MPI 1.1 • Often provides very high performance – vendors tune their MPI well • Linux/Myrinet, MPICH, IBM SP3, Origin 2000, Cray T3E, many others… • Based on the AMUDP code base, same cool features • Robust, clear error reporting for ease of debugging • SPMD bootstrapping library (but we use site-specific mpirun) • Network performance/utilization monitoring API • MPI Interface • Non-blocking sends, non-blocking receives • Uses MPI communicators to co-exist happily with other MPI-aware layers
Good Bad AMMPI – Latency Performance minimal small message, round-trip time measured from application
Bad Good AMMPI – Bandwidth Performance with 64 KB messages == MAX_MEDIUM == MAX_LONG
