Network subsystem for parallel processor system and network system for

Abstract

A network system for a parallel processor system includes network subsystems connecting processor units to each other, where contention generated in communication between the processor units is restrained so as to increase the throughput of the system, improve the extensibility of the system, and enable the system to be formed by an amount of materials depending on a scale of the system. Each of the network subsystem comprising an input port, a group address judging unit making a judgement as to whether a destination undecided data supplied through the input port is addressed to its own subgroup or not, a network switch unit conducting a switching when the destination undecided data is judged to be addressed to its own subgroup to output it as a destination decided data, a destination decided data contention unit applied two destination decided data fed from the network switching unit and the input port to solve contention between the two destination decided data, an output port outputting the destination decided data, and another output port outputting the destination undecided data when said destination undecided data is judged to be addressed another subgroup by the group address judging unit.