Data transfering apparatus and information processing system

摘要

A data transferring unit performs hit determination on a cache memory based on a management table and a request from a CPU board. If requested data is not available in the cache memory, the data transferring unit reads and sequentially transfers the requested data from a shared memory in packets of optimum packet length stored in a time table in such a way that the previous packet is transferred while the next packet is read. In addition, the data transferring unit measures a packet transfer time. A packet-length optimizing unit varies, based on the packet transfer time calculated by the data transferring unit and data stored in the time table, an optimum packet length so that the difference between the packet transfer time and a packet read time is minimized.