Virtual machine control apparatus and virtual machine control method

A virtual machine control method for controlling a virtual machine control apparatus comprising:

• a processor configured to use a device settable in either a normal mode or a low power mode having lower electrical power consumption per unit time and lower processing ability than the normal mode;
• and a memory configured to store therein a program executable by the processor, the virtual machine control apparatus, through execution by the processor of the program stored in the memory, implementing:
• one or more first type virtual machines;
• one second type virtual machine;
• and
• a hypervisor configured to control execution of each of the first type virtual machines and the second type virtual machine,
• the virtual machine control method comprising:
• a start detection step of any one of the first type virtual machines detecting an operation therein to start usage of the device;
• a start signal output step of the first type virtual machine outputting a start signal when the operation is detected in the detection step, and
• a device control step of the second type virtual machine controlling to set the device in the normal mode when, while the device is set in the low power mode, the start signal is output in the start signal output step.