Thread properties attribute vector based thread selection in multithreading processor
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United States of America Patent
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Jun 6, 2000
Grant Date -
N/A
app pub date -
Dec 31, 1996
filing date -
Dec 31, 1996
priority date (Note) -
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Abstract
A technique is provided for selecting a preferred thread from a plurality of threads executing within a simultaneous multithreaded, out-of-order execution computer system, the preferred thread possessing those instructions which, while in flight within the pipeline of the computer system provide, in contrast to those instructions belonging to other threads, a more beneficial performance of the central processing unit of the computer system. To determine the preferred thread, a technique is provided to evaluate attributes of each thread which indicate whether the thread includes a number of instructions which are likely to be cancelled while in flight or whether a thread includes instructions which will remain in the instruction queue for a number of cycles, unable to execute, thus stalling the execution of the thread to which the instruction belongs.
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