Simulation system, simulation program, and simulation method

A non-transitory computer readable medium storing a simulation program for simulating a simulation model including a plurality of events in each of which a start-up time for start-up in any coordinate space is stored, the simulation program comprising:

• a time wheel generation module that generates, as a hierarchical time wheel, a plurality of time wheels in which a plurality of step sizes of time evaluated as subsequent times in discrete time are set as tags and the event is registered in association with the tags, to correspond to the start-up time of the event ranging over a plurality of time tiers having different time units;
• and
• an event registration module that registers the event by registering the event in association with the tags of the plurality of time wheels of the hierarchical time wheel generated by the time wheel generation module, wherein
• an error generated between the start-up time stored in the event and the start-up time at which the event is actually started is adjusted on a basis of a difference between a first designated position indicating a current time set in advance for a first time wheel when the time wheel corresponding to any of the time tiers of the hierarchical time wheel is assumed as the first time wheel, and an n-th designated position indicating a current time set in advance for an n-th time wheel when the time wheel corresponding to a lower-order time tier than the first time wheel is assumed as the n-th time wheel, and
• the event associated with the tags is started when the first designated position of the first time wheel and the n-th designated position of the n-th time wheel coincide with the start-up time of the event.

A simulation method of simulating a simulation model including a plurality of events in each of which a start-up time for start-up in any coordinate space is stored, the simulation method comprising:

• generating, as a hierarchical time wheel, a plurality of time wheels in which a plurality of step sizes of time evaluated as subsequent times in discrete time are set as tags and the event is registered in association with the tags, to correspond to the start-up time of the event ranging over a plurality of time tiers having different time units;
• registering the event by registering the event in association with the tags of the plurality of time wheels of the hierarchical time wheel generated by the time wheel generation module;
• adjusting an error generated between the start-up time stored in the event and the start-up time at which the event is actually started on a basis of a difference between a first designated position indicating a current time set in advance for a first time wheel when the time wheel corresponding to any of the time tiers of the hierarchical time wheel is assumed as the first time wheel, and an n-th designated position indicating a current time set in advance for an n-th time wheel when the time wheel corresponding to a lower-order time tier than the first time wheel is assumed as the n-th time wheel;
• and
• starting the event associated with the tags when the first designated position of the first time wheel and the n-th designated position of the n-th time wheel coincide with the start-up time of the event.