| 摘要 |
PROBLEM TO BE SOLVED: To lessen a network load and a controller load relating to reading data from a controller.SOLUTION: An address information common management unit transmits, as a response, requested address information if holding the requested address information in a first cache 7-1 that holds address information on a shared memory area 3 where data is stored; otherwise acquires corresponding address information from a first device 2, stores the acquired address information in the first cache 7-1, and transmits, as a response, the acquired address information. A data access unit acquires corresponding data from the shared memory area 3 on the basis of address information on data to be acquired by a process held in a second cache 7-2 that holds address information on the shared memory area 3 where the data is stored and transmits, as a response, the acquired data if holding the address information in the second cache 7-2; otherwise acquires corresponding address information from the address information common management unit, acquires corresponding data from the shared memory area 3 on the basis of the acquired address information, and transmits the acquired data as a response. |
