Fujitsu Corporation

Fujitsu Limited Kawasaki

Masayuki Katori

Kenichi Ishizaka

Hiroshi Komatsuda

Masayuki Ikeda

Shigeru Nagasawa

Akihito Kiyaji

In a parallel data processing control system for a parallel computer system having a plurality of computers and an adapter device connecting the computers to each other, a first unit, which is provided in the adapter device, transfers pieces of data processing progress state information to the computers. The pieces of the data processing progress state information respectively indicate data processing progress states of the computers. A second unit, which is provided in each of the computers, holds the pieces of the data processing progress state information. A third unit, which is provided in each of the computers, holds management information indicating a group of computers which share a data process. A fourth unit, which is provided in each of the computers, determines whether or not the computers in the group have completed the data process on the basis of the pieces of the data processing progress state information and the management information.

Barrier synchronizing mechanism for a parallel data processing control

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.

Network subsystem for parallel processor system and network system for

A networking apparatus has its switching unit set a path for a data transfer from a processing apparatus on the data origination side to a processing apparatus on the data termination side. In case of a stop in the processing apparatus on the data origination side during the data transfer, the networking apparatus has its offline status detecting unit detect the stop by the presence or absence of an online status indication signal from the processing apparatus on the data origination side and generate an offline status indication signal. The networking apparatus has its controlling unit receive the offline status indication signal, and generate a simulated end-of-data signal, indicating a consummation of a data transfer, for transmission to a switching unit. The networking apparatus has its switching unit detect an end of data by receiving the simulated end-of-data signal, and cancel the path for the data transfer from the processing apparatus on the data origination side to the processing apparatus on the data termination side.

Networking apparatus which detects a stoppage of data transfer in a

A multiprocessor system comprising a networking apparatus and a plurality of data processing apparatuses for transferring data through the networking apparatus from one to another of the plurality of data processing apparatuses. The networking apparatus contains: a switch unit for switching data transfer paths between data processing apparatuses; a priority control unit for determining and controlling the data transfer paths in response to requests from the data processing apparatuses; and an abnormality detecting unit for monitoring the operation of the priority control unit, generating and outputing to the data processing apparatus which has output the requests an abnormality informing signal. When the networking apparatus is comprised of a plurality of stages each containing at least one switch circuit for switching data transfer paths, an abnormality detection circuit and an abnormality detection signal transferring unit are provided for each switch circuit, for transferring the abnormality detection signal along the route for the data transfer passing through the switch circuit, in a direction opposite to the direction of the data transfer. Further, identification of the stage at which the abnormality detection signal has been generated, may be maintained until the abnormality detection signal reaches the data processing apparatus.

Multiprocessor system transferring abnormality detection signal

A multiprocessor system containing a networking apparatus and a plurality of processors for transferring data through the networking apparatus from one to another of the plurality of processors. At least one receiving-side processor transmits a transfer allowance signal to the networking apparatus when the processor is ready to receive data, and transmits an on-line/off-line signal to the networking apparatus, where the on-line/off-line signal indicates whether the second processor is in an on-line state or off-line state. The networking apparatus includes a data transfer control unit, provided on each route for transferring data, for receiving data transferred from one of transmitting-side processors, temporarily storing the data, and transferring the data to one of the receiving-side processor when the data transfer control unit receives the transfer allowance signal from the second processor; and an off-line state detecting unit for outputting a data discharge control signal to the data transfer control unit when the on-line/off-line signal indicates that the second processor is in the off-line state. The data transfer control unit further contains a data discharge unit for discharging the data temporarily stored in the data transfer control unit in response to the data discharge control signal, regardless of the transfer allowance signal.

Growing community of inventors

Kawasaki, Japan

Masayuki Katori