| 摘要 |
A simultaneous multi-threaded architecture combines OS priority information with thread execution heuristics to provide dynamic priorities for selecting thread instructions for processing. The dynamic priority of a thread is determined by adjusting a heuristic measure of the thread's execution dynamics with a priority-dependent scaling function determined from the OS priority of the thread. An SMT processor includes logic for calculating a scaling function for each thread scheduled on the processor, tracking the threads' heuristics, and combing the scaling function and heuristic information into a dynamic priority for each thread. Instructions are selected for execution from among the scheduled threads according to the threads' dynamic priorities.
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