Prefetch command control method, prefetch command control apparatus and cache memory control apparatus

摘要

According to the invention there is provided a pre-extraction instruction control unit. Protocol slot generation unit is, when the use time of the pre-data to be extracted from the CPU to receive the pre-extraction command is specified, on the basis of the used time slot, and generating the protocol register the protocol slots in the schedule list storage unit. Protocol slot generation unit, when receiving the normal access command, and registers the protocol slots in the regular protocol queue storage unit. Cost evaluation unit, on the basis of pre-cache retention cost of data to be extracted evaluate the distribution cost of the pre-extraction command on the basis of resource consumption and cost evaluates the distribution cost of a regular access command. Protocol Distribution unit, based on the evaluation result of these deployment costs and determine which command is to be distributed in advance or regular access to the Extract command command. ; Pre-extraction command, control, protocol slot generation unit, the evaluation unit cost, distribution cost