Research on the Problem of the Cache Coherence
Han Jun-fan · Sci-Tech Information Development & Economy · 2005
Taking the multi-processor system of the common bus as the example, this paper introduces the Snoopy Protocol and the Write-Once Protocol used for solving the problem of Cache Coherence in the common bus system, analyzes on the advantages of the Write-Once Protocol and the Coherence Protocol and on the causes of the separating state of the protocols, and gives an angle for evaluating the good or bad of a protocol: the flow of the bus and the valid time of the access of the memory.