Multi-processor task dispatching apparatus

Details Multi-processor task dispatching apparatus Multi-processor task dispatching apparatus

G - Physics

06

F

354/230.85

G06F 9/46 (2006.01) G06F 9/48 (2006.01)

Patent

CA 1173971

ABSTRACT Task dispatching for an asymmetric or symmetric multiprocessor system is provided where all the pro- cessors are dispatched from a single task dispatching queue. The workload, i.e. tasks, of the multiprocessor system is distributed to the available processors. Each processor includes a task dispatcher and a signal dispatcher. The signal dispatcher runs in a processor whenever a task dispatching element (TDE) is put on the task dispatching queue (TDQ) as a result of the task running in the processor. The signal dispatcher ex- amines the TDEs enqueued on the TDQ and determines if any task dispatcher should be invoked, i.e. if any processor is running a lower priority task a task switch should occur. If so, it signals the selected processor to invoke its task dispatcher. After com- pleting the task switch, the selected processor must invoke its signal dispatcher to determine if the task it had been performing should now be performed on some other processor in the multiprocessor system. RO980-005

400639

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