Abstract: One of a first computer and a second computer has a virtualization module and the other one does not have a virtualization module. In response to a migration instruction, an OS in execution on the first computer is suspended. The contents of a memory area of the first computer used for the OS at the suspend point are migrated to a memory area of the second computer. In this migration, a storage area of information indicative of the OS suspend point is included. A memory area management method between the first computer and the second computer is converted. Then, the second computer resumes OS execution by referring to the information indicative of the suspend point and using the migrated contents of the memory area.

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.