ACCESS SYSTEM OF CACHE PRECEDING

摘要

PURPOSE:To prevent the deterioration of a system by limiting a block to be fixed on a cache to an area specified by an address in accessing and the address of preceding access. CONSTITUTION:Sequential access already accessed the copy of a block A in a main storage buffer 30, i.e. a block (a) in the cache 2 and is accessing the copy of a block B, i.e. a block (b). The copy of a block C is stored in the cache 2 as a block (c) by block transfer from a main storage 3 to the cache 2 on the basis of the preceding access. Under said state, a fixed flag obtains ''0'' because sequential access passed the whole area of the block (a) indicating the fixing is released to be an object to be replaced.