A multiprocessor control unit acquires first non processing time information on a first non processing time represented for each processor, wherein the first non processing time represents a time in which a first block is not executed in a first barrier establishment time from barrier synchronization start until barrier synchronization establishment of the first program block, and acquires second non processing time information on a second non processing time represented for each processor, wherein the second non processing time represents a time in which a second block is not processed in a second barrier establishment time from barrier synchronization start until barrier synchronization establishment of the second program block. The multiprocessor control unit controls a power supply for the processors while the first and second program blocks are consecutively executed in parallel, using the first and second non processing time information acquired.