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AssigneeInternational Business Machines Corporation
InventorsAdam C. Lange-Pearson, Thomas J. Warne
Estimating the term…
Methods, apparatus, systems, and articles of manufacture for maintaining virtual real time clocks (virtual RTCs) in a logically partitioned computer system are described. Changes made to a hardware real time clock (hardware RTC) while a partition manager is not running (or is not fully operational) are tracked. The cumulative effect of these changes on the hRTC value may be captured in a clock delta variable. For some embodiments, a service processor may be configured to track the changes to the hRTC while the partition manager is not running and generate the clock delta. Upon loading, the partition manager may utilize this captured clock delta to make adjustments to vRTCs, in an effort to preserve their integrity by compensating for the changes made to the hRTC while the partition manager was not running.
A method for maintaining at least one virtual real time clock for at least one logical partition managed by a logical partitioning operating system, comprising:
A method for maintaining one or more virtual real time clocks in a computer system having one or more logical partitions managed by a logical partitioning operating system, the method comprising:
A computer-readable medium containing a program for maintaining at least one virtual real time clock which, when executed by a processor, performs operations comprising:
A logically partitioned computer system, comprising:
Dependencies are inferred from the claim text.