Parallel dedicated hardware devices for heterogeneous computations
Proceedings of the 2001 ACM/IEEE conference on Supercomputing
N-Body Simulation on Hybrid Architectures
ICCS '01 Proceedings of the International Conference on Computational Science-Part II
Performance Analysis of Parallel N-Body Codes
HPCN Europe 2000 Proceedings of the 8th International Conference on High-Performance Computing and Networking
Parallel Simulation of Radio-Base Antennas on Massively Parallel Systems
IPDPS '01 Proceedings of the 15th International Parallel & Distributed Processing Symposium
LICO: A Multi-platform Channel-Based Communication Library
Proceedings of the 9th European PVM/MPI Users' Group Meeting on Recent Advances in Parallel Virtual Machine and Message Passing Interface
Performance Modeling of Distributed Hybrid Architectures
IEEE Transactions on Parallel and Distributed Systems
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In this work we present the results of a project aimed at assembling an hybrid massively parallel machine, the PQE1 prototype, devoted to the simulation of complex physical models. The analysis of some of the existing parallel architectures has revealed that general-purpose machines are largely over-dimensioned and often perform inefficiently in grand-challenge scientific applications. We have thus developed an heterogeneous parallel system which matches task-heterogeneity with architecture-heterogeneity: in fact special-purpose massively parallel architectures, when coupled to general-purpose machines, are able to efficiently satisfy the requirements of complex scientific computing. We present the HW structure and the SW tools developed for the PQE1 prototype. Starting from the concept of machine-granularity and task-granularity, we show the necessity to exploit both high granularity and low granularity parallelism to efficiently use the PQE1 system. Some examples describing application fields in which the PQE1 prototype has been successfully used are briefly described.