Cache memory failure processing apparatus, cache memory failure processing method, and multiprocessor system

摘要

PROBLEM TO BE SOLVED: To restore updated data even when the data stored in a cache memory cannot be written back due to a fault in the cache memory in a store-in system. SOLUTION: An updated address holding part 3 is constituted of a main storage address register 20 to hold a main storage address, updated address storage mechanism 21 consisting of plural updated address storage entries 211 to store the contents of the main storage address register 20, address comparison mechanism 22 to compare a value of the main storage address register 20 with a value of the updated address storage mechanism 21 and updated address storage control mechanism 23. An address is registered in the updated address storage mechanism 21 by writing data, the address is deleted by writing the updated data in a main storage 8, other cache memory 4 is searched by the address in the updated address storage mechanism 21 when the fault occurs and the updated data is restored by writing the data held by the same address in the main storage 8.