Electrical computers and digital processing systems: support – Clock – pulse – or timing signal generation or analysis
Reexamination Certificate
2006-12-26
2006-12-26
Browne, Lynne H. (Department: 2116)
Electrical computers and digital processing systems: support
Clock, pulse, or timing signal generation or analysis
C713S502000
Reexamination Certificate
active
07155629
ABSTRACT:
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.
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Lange-Pearson Adam C.
Warne Thomas J.
Browne Lynne H.
Yanchus, III Paul
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