According to an embodiment, a control device includes a receiving unit configured to receive an interrupt request requesting an interrupt process to be executed by a processing device that executes one or more processes; a storage unit configured to store therein the interrupt request; a determining unit configured to determine a state of the processing device; a sending unit configured to send the interrupt request to the processing device; and a control unit configured to store the interrupt request received by the receiving unit in the storage unit when the processing device is determined by the determining unit to be in an idle state in which the processing device is not executing the processes and a predetermined condition is not satisfied, and to control the sending unit to send the interrupt request stored in the storage unit to the processing device when the predetermined condition is satisfied.