Information processing apparatus and time-of-day control method

An information processing apparatus comprising:

• a control unit including a first clock device for providing a time of day;
• and
• a plurality of physical domains each including a second clock device for providing a time of day and each configured to be capable of implementing at least one logical domain that functions as a virtual information processing apparatus,
• wherein the control unit controls a first time-of-day difference between the time of day on the second clock device of each physical domain and the time of day on the first clock device,
• wherein each physical domain manages a second time-of-day difference between a time of day on a logical domain implemented on the physical domain and the time of day on the second clock device of the physical domain, and
• wherein the time of day on the logical domain implemented on each of the plurality of physical domains is controlled based on the first time-of-day difference and the second time-of-day difference.