A processor includes a first transmitting unit that transmits, when receiving from a second processor a transmission request indicating transmission of target data which is read from a main storage unit and stored in the first processor, a transfer instruction to the first processor, the transfer instruction indicating transfer of the target data and state information to the second processor, the state information indicating a state of the target data used when the second processor reads and stores the target data. The processor includes a second transmitting unit that transmits acquisition information indicating acquisition of the target data to the second processor before receiving a response to the transfer instruction transmitted by the first transmitting unit from the first processor.