| 摘要 |
In a computer system according to the background art, when a request to halt a virtual processor was detected, the virtual processor was blocked. In the blocking method, latency of virtual halt exit of the virtual processor was so long that a problem of performance was caused. A virtual machine monitor selects either of a busy wait method for making repeatedly examination until the virtual halt state exits while the virtual processor stays on the physical processor and a blocking method for stopping execution of the virtual processor and scheduling other virtual processors on the physical processor while yielding the operating physical processor and checking off scheduling of the virtual processor to the physical processor, based on a virtual processor halt duration predicted value of the virtual processor which is an average value of latest N virtual processor halt durations of the virtual processor.
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