MULTIPROCESSOR SYSTEM AND SHARED MEMORY CONTROL METHOD

To allow the available status of a message queue in a multiprocessor system to be determined with a small circuit scale.SOLUTION: In a shared memory type multiprocessor system including a first processor 3 and a second processor 6, when a message is transmitted to a shared memory 2, the first proces...

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Bibliographic Details
Main Author TADOKORO MITSUNORI
Format Patent
LanguageEnglish
Japanese
Published 24.09.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:To allow the available status of a message queue in a multiprocessor system to be determined with a small circuit scale.SOLUTION: In a shared memory type multiprocessor system including a first processor 3 and a second processor 6, when a message is transmitted to a shared memory 2, the first processor increments a first head pointer indicating the beginning of a free position in a message queue 21, and copies the same value as the first head pointer to a second tail pointer indicating the end position of a message.SELECTED DRAWING: Figure 1 【課題】小さい回路規模でマルチプロセッサシステムにおけるメッセージキューの空き状況の判断を可能にすること。【解決手段】第１プロセッサ３と第２プロセッサ６とを有する共有メモリ型のマルチプロセッサシステムにおいて、第１プロセッサは、共有メモリ２へメッセージを送信するときに、メッセージキュー２１の空き位置の先頭を示す第１ヘッドポインタをインクリメントするとともに、第１ヘッドポインタと同じ値をメッセージの末尾位置を示す第２テールポインタにコピーする。【選択図】図１
Bibliography:Application Number: JP20190053337