Patent ID: 9304789
Filing Date: 2016-04-05
CPC Classification: G06F,Y02D

Claim Text:
1. A virtual machine control device, configured of one or more processors, for controlling a first virtual machine and a second virtual machine, the first virtual machine and the second virtual machine being configured in such a manner that the one or more processors are assigned to the first virtual machine, a first operating system is operative in the first virtual machine, the one or more processors are assigned to the second virtual machine, and a second operating system is operative in the second virtual machine, the second operating system being provided with an electric power saving controller which controls supply of electric power to the processors, based on usage statuses of the processors, the virtual machine control device comprising: a pseudo task generation requester which notifies the second operating system of a request for generating a pseudo task which is a task which when operated on one of the processors indicates to the second virtual machine that a task by the first virtual machine is being performed on the one processor, wherein the second operating system includes a pseudo task generator which generates the pseudo task to be assigned to the one processor, when receiving the notification of the request for generating the pseudo task, and the electric power saving controller of the second operating system, in response to the indication by the pseudo task operated on the one processor, prevents the one processor from being brought to an electric power saving state.