Fujitsu Corporation

Sadayuki Kato

Takeshi Horie

Satoshi Inano

Toshiyuki Shimizu

Hiroaki Ishihata

In a data gathering/scattering system having a data gathering system and a data scattering system in a parallel computer constituted by a plurality of processors connected in parallel through a common bus or hierarchical common buses, the data gathering/scattering system includes: one processor having a buffer for temporarily storing data gathered from or transmitted to other processors, a three-state buffer for transmitting data from the buffer to the common bus, and a switching unit for switching a connection between a transmission and a reception to form the data gathering system or the data scattering system; each of the other processors having a buffer for temporarily storing data to be transferred or data to be received, a transfer control unit for controlling data transmissions from the buffer to the common bus, a reception control unit for selecting the reception data from among all data on the common bus, a three-state buffer for transmitting data from the buffer to the common bus, and a switching unit for switching a connection between a transmission and a reception to form the data gathering system or the data scattering system, and an AND circuit for obtaining a coincidence of a data transmission or data reception among the processors, and for sending a command for a data transmission or data reception to other processors.

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Kawasaki, Japan

Sadayuki Kato