METHOD FOR PROCESSING CACHE COHESION PROTOCOL OF MULTI-PROCESSOR SYSTEM

摘要

PURPOSE: A method for processing a cache cohesion protocol of a multi-processor system is provided to improve system performance by removing a dummy cycle generated from a data call line between processors of the multi-processor system. CONSTITUTION: The first processor makes a comparator judge that a source desired from the processor is in a cache by operating an address. In case of a cache hit, a read/write operation is performed to the cache. In the case of a cache miss, when other processors access through the same address during the read/write operation from the memory to the cache, the operation of the first processor is judged by accessing a memory through a system bus. A snoop controller generates the snoop control signals different with each other depending on the read or the write operation of the first processor.