1. A control apparatus comprising: a plurality of processing apparatuses being accessible to a memory that is a notification destination of interrupt, each of the plurality of processing apparatuses configured to perform polling the memory to detect a interrupt message written by a notification source of interrupt in the memory, if the interrupt message is detected, a processing apparatus assigned as a processing apparatus to process interrupt processing corresponding to a cause of interrupt included in the interrupt message from the plurality of processing apparatuses performs the interrupt processing corresponding to the cause of interrupt, a task executed in each processing apparatus includes a queue to which a command to be processed is connected, the interrupt processing connects a command corresponding to each cause of interrupt to the queue, and when a requirement for a first task to communicate with a second task occurs while the first task is processing a command, the first task on a transmitting side connects the command to a queue of the second task on a destination side.