| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain a high speed access even when the access requires the processing of much data in the case of arbitrating access right by plural processors to access a shared memory. SOLUTION: The accesses of respective processors 1 to 3 are divided into access blocks each of which consists of prescribed continuous accesses. The processor 1 transmits shared memory use requests 61, 63 to all processors other than the processor 1 itself by using a communication line 6 connecting respective processors 1 to 3 in the case of accessing the shared memory 4, receives shared memory use permission 62, 64 to acquire the access right and bolds the access right until the end of the access block to continuously access the shared memory. Since the access right is arbitrated in each access block, the frequency of arbitration can be drastically reduced and the speed of an access can be increased.</p> |
