Method and system for simulating performance of a computer system

Abstract

A high-speed performance simulation method and system for simulating the performance of a large-scaled system such as a parallel computer. In implementation, the large-scaled system is divided into subsystems or partial units and the divided subsystems are simulated in parallel. Even when a particular partial unit occupies a shared resource, high-speed, well-coordinated performance simulation is achieved. A performance simulation system includes a plurality of performance simulators and an overall control section connected to these performance simulators. The plurality of performance simulators individually simulate the performances of partial units into which a simulant is divided. The overall control section causes the performance simulators to conduct the simulation processes alternately every AT cycle. When having finished a performance simulation process for a AT cycle, the first performance simulator transmits to the second performance simulator shared resource data stored in a shared resource management section, the shared resource occupation status data indicating that the shared resource is occupied. Then, the second performance simulator conducts a performance simulation process for a AT cycle and transmits shared resource occupation status data to the first performance simulator. The performance simulators responsible for subsystems that have no shared resource conduct simulation processes concurrently to increase the whole simulation speed.