Process for shutting down a CPU in a SMP configuration

Details Process for shutting down a CPU in a SMP configuration Process for shutting down a CPU in a SMP configuration

2006-02-07

2006-02-07

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S023000

Reexamination Certificate

active

06996745

ABSTRACT:
A symmetric multiprocessor (SMP) system includes a plurality of central processing units (CPUs). Processing by a central processing unit (CPU) is safely halted i.e., a CPU is shut down, using a technique that assures that the CPU is executing an idle thread when the CPU is shut down. Halting the CPU safely means (a) that the CPU cannot be executing a thread other than the idle thread, and (b) that state information for a thread does not reside only within the CPU. The first limitation assures that the CPU cannot be executing a time critical thread that fails if the execution of the time critical thread has to move to another CPU.

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