1. A memory access control device comprising: a memory; a memory control unit configured to perform access control of said memory; and a software execution unit configured to execute software that manages said memory and said memory control unit, wherein said memory control unit comprises: a data transmission unit configured to perform multicast transfer that reads a data from said memory and transmits said read data to data transfer destinations through a network; a data reception unit configured to receive multicast transfer data from said network; and a reception data counter configured to indicate a number of multicast transfer data received by said data reception unit, wherein said software execution unit instructs said memory control unit to perform a plurality of multicast transfers and then reads respective reception data counters of said data transfer destinations for each checkpoint in sequence of said software to determine completion of said plurality of multicast transfers.