Other

Hitachi, Ltd.

Hitachi Information Technology Co., Ltd.

Tomonaga Itoi

Takeshi Yoshida

Toshihiro Ishiki

Junichi Funatsu

Tohru Hiraoka

Masashi Hakamada

Naoto Sakuma

A server system has, in addition to extensibility of scale-out type of a braid server system, extensibility of scale-up type by making SMP coupling among nodes. Each node has a unit for SMP coupling to other nodes. A module management unit responds to system configuration information to switch between a mode in which the node operates singularly as a braid server and a mode in which the node operates as a constituent module of an SMP server. Links among individual nodes are laid through equidistant wiring lines on a back plane and additionally a loop wiring line having a length equal to that of the inter-node link on the back plane is also laid in each node, thereby setting up synchronization among the nodes. Synchronization of reference clocks for SMP coupled nodes can be is also established.

Multi node server system

According to the present invention, instruction decoding can be separated into two stages. In a first instruction decoding stage, multiple instructions are decoded in a single machine cycle. Also, in the first instruction decoding stage, when a branch instruction is decoded a memory is requested to read a branch destination instruction for the branch instruction. The instructions decoded in the first instruction decoding stage is stored temporarily in instruction flow registers. In a second instruction decoding stage, instructions read sequentially from the instruction flow registers are decoded.

Data processing device including two instruction decoders for decoding branch instructions

Growing community of inventors

Hadano, Japan

Tomonaga Itoi