CONTROL SYSTEM FOR PARALLEL COMPUTER COMMUNICATION

摘要

PURPOSE:To prevent the easy occurrence of a congestion state of communication by performing the control so that a message transmitting direction is decided based on the value of a residual capacity table of an adjacent processor reception buffer when a transmission request is produced. CONSTITUTION:Each processor 10 contains a residual capacity table 14 of an adjacent processor communication buffer and has a size Ri (i=1-4) of an idle area of a reception message buffer 17 of the adjacent processor 10 in accordance with the communicating direction of the processor 10. The table value Ri is initialized in the maximum size of the buffer 17 in an initialization state where a power supply is applied. If a message transmitting request is received from a transmission request part 15, a message transmitting direction deciding part 13 is started. The part 13 reads the message address and decides plural transmitting directions. Then the values of the corresponding capacities R3 and R4 are read out of the table 14 and the message is transmitted in the SOUTH with R3<R4 and in the EAST with R3>R4 respectively. While either direction is selected according to the priority when R3=R4 is satisfied.