Fujitsu Corporation

Yasuhiro Kuroda

Shoji Nakatani

Michio Numata

Nobuo Uchida

According to an aspect of an embodiment, a server system includes a service processor, a plurality of system boards and a plurality of crossbar boards connecting the system boards. The service processor includes a first notifier that notifies each of the crossbar boards of a crossbar board subjected to maintenance. The crossbar boards each include a first transmitter that, when notified by the service processor that the crossbar board subjected to maintenance is another crossbar board, generates a suspension packet for suspending packet transmission to the another crossbar board and transmits the suspension packet to each of the system boards. The system boards each include a suspender that, when receiving the suspension packet from the crossbar board, suspends packet transmission to the crossbar board subjected to maintenance.

Server system and dynamic maintenance method for crossbar board

Cross bar control circuits are connected to each other by two buses, which are a broadcast bus for transmitting a broadcast packet from a system board to all system boards other than the system board and a point-to-point bus for transmitting a unicast packet from a system board to another system board. When unicast packets passing through the point-to-point bus are too many, the unicast packets are output by using the broadcast bus in addition to the point-to-point bus if the broadcast bus is not used. In this way, the unicast packets can be output quickly and efficiently, so that use efficiency of the broadcast bus and the point-to-point bus can be increased as a whole.

Information processing device, data transfer circuit, and control method of information processing device

An information processing device includes SBs; an XBB for executing data transfer between the SBs; and an SCF for managing and controlling the SBs and the XBB. The SB includes a transmitting/receiving unit for transmitting a notification packet indicating occurrence of an error via the XBB when detecting the occurrence of the error. The SCF includes an executing unit for executing a configuration change process corresponding to an instruction when detecting the instruction related to the SB, a suspending unit for suspending acceptance of an error report from the SB in which the error occurs during execution of the configuration change process and an XBB controller for controlling the XBB to destroy the notification packet received from the SB of which configuration change process is being executed and controlling the XBB to inhibit transfer of the notification packet to the SB of which configuration change process is being executed.

Information processing device, transfer circuit and error controlling method for information processing device

A multiprocessor control system which has at least one main storage unit, a plurality of main storage control units, a plurality of processing units, and a control bus. Each processing unit is connected to the main storage unit through one of the main storage control units. When each processing unit transmits a request for access to at least one main storage unit, the processing units transmit the request to the main storage control units to which each processing unit is connected, and simultaneously, to all of the other main storage control units, through the control bus. All of the main storage control units process the request from the processing unit, synchronously, and execute a busy check control or the like. Data transmitted between each processing unit and an arbitrary one of the main storage units is transmitted only through the main storage control unit to which the processing unit is connected. By using this system, if units needing a high throughput are applied, the system can be controlled in a comparatively simple manner.

Growing community of inventors

Kawasaki, Japan

Yasuhiro Kuroda