Hitachi, Ltd.

Hitachi Microcomputer Engineering, Ltd.

Toshiharu Shinozaki

Yoshifumi Takamoto

Masaaki Iwasaki

Shoji Yamamoto

Toshiaki Arai

Takashi Sumiyoshi

Kazuo Masai

Tetsuo Saito

A multiple virtual storage management method which requests, by a first program allocated to a first virtual space, subordination of the first virtual space to a first one of the space families at a timing determined by the first program, subordinates the first virtual space to the first family, in response to the request for subordination, requests, by a second program allocated to a second virtual space which is subordinated to a second one of the space families, secession from the second space family at a timing determined by the second program and permits the second virtual space to secede from the second space family in response to the request for secession.

Method for managing multiple virtual storages divided into families

Task execution control for a multiprocessor wherein at a time point when a post issue task ends the use of a shared resource, the shared resource is released, another task which is running on another processor is allowed to lock the shared resource, and thereafter the task is made ready. After that, the post procedure is initiated, and thereafter through the high-speed dispatch procedure, the processor is granted first to a task which has failed to lock the shared resource, and the task is prompted to retry to lock the shared resource.

Task execution control method for a multiprocessor system with enhanced

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Yokohama, Japan

Toshiharu Shinozaki