A multi-transputer system for parallel Monte Carlo simulations of extensive air showers

Details A multi-transputer system for parallel Monte Carlo simulations of extensive air showers A multi-transputer system for parallel Monte Carlo simulations of extensive air showers

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989cophc..56..105g&link_type=abstract

Computer Physics Communications, Volume 56, Issue 2, p. 105-113.

Physics

1

Scientific paper

A multiprocessor computer system has been brought into operation at the Kernforschungszentrum Karlsruhe. It is dedicated to Monte Carlo simulations of extensive air showers induced by ultra-high energy cosmic rays. The architecture consists of two independently working VMEbus systems each with a 68020 microprocessor as host computer and twelve T800 transputers for parallel processing. The two systems are linked via Ethernet for data exchange. The T800 transputers are equipped with 4 Mbyte RAM each, sufficient to run rather large codes. The host computers are operated under UNIX 5.3. On the transputers compilers for PARALLEL FORTRAN, C, and PASCAL are available. The simple modular architecture of this parallel computer reflects the single purpose for which it is intended.
The hardware of the multiprocessor computer is described as well as the way how the user software is handled and distributed to the 24 working processors. The performance of the parallel computer is demonstrated by well-known benchmarks and by realistic Monte Carlo simulations of air showers. Comparisons with other types of microprocessors and with large universal computers are made. It is demonstrated that a cost reduction by more than a factor of 20 is achieved by this system as compared to a universal computer.

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