| 摘要 |
PURPOSE:To constitute a cache memory system for prefetch with high efficiency by adding a control line to a cache memory LSI to suppress the prefetching actions. CONSTITUTION:All cache memory LSI forming a cache memory system 20 monitor the access requests given from a processor 21 and check whether or not a block to be prefetched exists in its own cache if an access requiring a prefetching action is detected. If said block to be prefetched exists, a prefetch suppressing line 8 is validated. A cache memory LSI 1 which is going to have a prefetching action monitors the line 8 and performs no prefetching action when the line 8 is validated.
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