Shared memory apparatus and method for multiprocessor systems

G - Physics – 06 – F

Patent

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G06F 13/16 (2006.01)

Patent

CA 2367065

A memory alias adapter, coupled to a processor's memory bus, monitors processor memory accesses. Whenever a memory access corresponds to shared memory, rather than memory local to the processor, the adapter constructs a memory request message, and transmits the message over a network link to a shared memory unit. The shared memory unit performs the shared memory access and issues a response message over the network link. The memory alias adapter accepts the response message, and completes processor's memory access on the memory bus. As a result, it is transparent to the processor whether its memory access is to the local memory or to the shared memory.

Une mémoire alias adaptateur, couplée à un bus mémoire de processeur, contrôle les accès en mémoire du processeur. Lorsqu'un accès en mémoire correspond à une mémoire partagée, à la place d'une mémoire locale du processeur, l'adaptateur construit un message de demande de mémoire, et il transmet le message par une liaison de réseau à une unité de mémoire partagée. L'unité de mémoire partagée exécute l'accès en mémoire partagée et émet un message de réponse par la liaison de réseau. La mémoire alias adaptateur accepte le message de réponse et exécute un accès en mémoire par le processeur sur le bus mémoire. Ainsi, le processeur sait si son accès en mémoire s'effectue vers la mémoire locale ou vers la mémoire partagée.

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