Title:
Virtual machine system
Document Type and Number:
Japanese Patent JP6168799
Kind Code:
B2
Abstract:
When changing the speed of the progression of a logical time in a paravirtualized OS, a hypervisor updates reference time and a reference counter value which is the value of a counter when the reference time is updated, to be used for time calculation by the paravirtualized OS, in accordance with the changed speed of the progression of time, to have new reference time and a new reference counter value. After that, the paravirtualized OS calculates the present time based on the new reference time and the new reference counter value. This can serve to maintain the continuity of time in the paravirtualized OS through before and after a change in the speed of the progression of time if made in the progression of time.
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Inventors:
Takashi Ito
Application Number:
JP2013048686A
Publication Date:
July 26, 2017
Filing Date:
March 12, 2013
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G06F11/22; G06F9/46; G06F17/50
Domestic Patent References:
| JP11015558A | ||||
| JP1309136A | ||||
| JP2011197820A | ||||
| JP2012194909A |
Foreign References:
| WO2012093490A1 |
Attorney, Agent or Firm:
Shoji Mizoi
Hiroto Yamachi
Hiroto Yamachi