Information processing method, information processing apparatus, and server

An information processing apparatus comprising:

• a first processor unit which is provided with a plurality of processors and executes a plurality of tasks by the plurality of processors in a particular order during a predetermined unit period, and repeating such execution over successive such predetermined unit periods;
• a second-processor which primarily performs computing;
• a main memory which stores information on tasks to be processed;
• and
• a data input and output processor which controls input and output of data with an external device, wherein
• the first processor unit includes:
• an execution request accepting part which accepts a request for execution of a new task;
• a parameter identification part which identifies a specified required number of processors for the new task, a processing time required to perform the new task using the required number of processors simultaneously, and a required bus bandwidth needed to process the new task;
• an execution permission part which determines whether the new task is executable or not, by:
• (i) confirming whether the processing time and the required number of processors are available within the predetermined unit time by referring a schedule file, which indicates an execution schedule of reserved tasks which have been already scheduled, and (ii) confirming whether an implemented bus bandwidth satisfies a total required bus bandwidth during the predetermined unit time, the total required bus bandwidth being a sum of bus bandwidths required for processing the reserved task and the new task;
• and
• an activation processing part which activates processing of the new task if the new task is determined to be executable, and wherein
• the execution permission part modifies, when a determination is made that the new task is not executable due to lack of sufficient processing time, required number of processors, or total required bus bandwidth within the predetermined unit time, at least either one of processors allocated for executing the reserved tasks and the order of execution in each processor in the predetermined unit period without changing the required number of processors and the required processing time for the reserved tasks or the new task, so that the new task is executable, and the required bus bandwidth includes at least any one of:
• a bus bandwidth required for the new task when transmitting data between the first processor unit and the main memory;
• a bus bandwidth required for the new task when transmitting data between the first processor unit and second processors;
• and
• a bus bandwidth required for the new task when transmitting data between the first processor unit and the data input and output processor.