| 摘要 |
PURPOSE: To control the allocation of cache memory and to effectively use a cache memory space in an information processing system comprising a central processing unit, a storage device and a memory control unit provided with plural cache memory. CONSTITUTION: This memory control unit 3 is provided with two or more cache memory 33 consisting of one or more unit cache memory 331, control memory 39 and a cache control part 37. An allocation means 371 which allocates the cache memory for data storage by a read/write request from the processing unit 1 selects the cache memory to store clean data and dirty data to which update for the clean data is applied for stored data from the plural cache memory arbitrarily. In this way, the balance of the working state of the plural cache memory is controlled, which improves the working efficiency of the cache memory space. |
