Virtual machine, virtual machine monitor and computer control method
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United States of America Patent
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Sep 17, 2013
Grant Date -
Jul 21, 2011
app pub date -
Jan 4, 2011
filing date -
Jan 15, 2010
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Abstract
A virtual machine monitor for a virtual machine. The virtual machine monitor makes the processor in the virtual machine: receive a timer setting from the guest OS in place of the timer, the timer setting being for making the timer generate a timer interrupt after a lapse of a setting period; change, when the guest OS inputs or outputs data from or to the I/O device via the virtual machine monitor, the setting period set in the timer so that a relation between I/O wait time recognized by the guest OS and I/O process time other than the I/O wait time becomes approximate to a relation between the I/O wait time recognized by the virtual machine monitor and the I/O process time; set the timer setting with the changed setting period in the timer; and notify, when receiving the timer interrupt, the guest OS of occurrence of the timer interrupt.
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