Method and apparatus for assigning thread priority in a...

Electrical computers and digital processing systems: processing – Processing control – Context preserving (e.g. – context swapping – checkpointing,...

Reexamination Certificate

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Reexamination Certificate

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07987346

ABSTRACT:
In a multi-threaded processor, thread priority variables are set up in memory. The actual assignment of thread priority is based on the expiration of a thread precedence counter. To further augment, the effectiveness of the thread precedence counters, starting counters are associated with each thread that serve as a multiplier for the value to be used in the thread precedence counter. The value in the starting counters are manipulated so as to prevent one thread from getting undue priority to the resources of the multi-threaded processor.

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Susan J. Eggers, Joel S. Emer, Henry M. Levy, Jack L. Lo, Rebecca L. Stamm, Dean M. Tullsen, “Simultaneous Multithreading: A Platform for Next-Generation Processors”, Sep./Oct. 1997; IEEE Micro, pp. 12-19.
David W. Burns, “Pre-Silicon Validation of Pentium4's SMT Capabilities”, Intel Design and Test Technology Conference, pp. 1-5.

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