Method and apparatus for dynamic CPU reconfiguration in a system employing logical processors
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Mar 9, 1999
filing date -
Mar 9, 1999
priority date (Note) -
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Abstract
A multiprocessor system having a plurality of CPUs that can be dynamically reconfigured between online and offline without system shutdown. The multiprocessor system includes a dynamic reconfiguration subsystem for reconfiguration without shutdown. The dynamic reconfiguration subsystem includes a service processor having a feature file for identifying a current online number corresponding to a current number of online CPUs, a current offline number corresponding to a current number of offline CPUs and an update number corresponding to changes to be made in the current online number and the current offline number. A reconfiguration control unit is provided for reconfiguring CPUs in the multiprocessor system without being shutdown that includes a store for storing configuration code in response to the feature file, a system state execution unit for executing the configuration code to form configuration control information and decoder means for decoding the control information to change the current number of online CPUs and the current number of offline CPUs by the update number.
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