| 摘要 |
PROBLEM TO BE SOLVED: To obtain an improved cache for the processor in a computer system by introducing randomness of certain level selectively in substitution algorithm and excluding a cache block according to the substitution algorithm. SOLUTION: The cache 60 includes a cache entry array 62 having various values, a cache directory 64 for tracing entries, and a substitution controller 66 which uses LRU algorithm altered selectively with a random number. Then when slight randomness is desirable, small randomness is introduced in a 2nd deformation example 70 and the substitution algorithm is altered. In a final modification example 74, no LRU bit is used and a block excluded in an 8- member class is completely selected with three random bits. Therefore, this is applicable to a single-processor computer system and a multiprocessor computer system. |
