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Method and apparatus for using an assist processor and value speculation to facilitate prefetching for a primary processor
Method and apparatus for using an assist processor and value speculation to facilitate prefetching for a primary processor
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机译:使用辅助处理器和值推测以促进对主处理器的预取的方法和装置
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摘要
One embodiment of the present invention provides a system that prefetches from memory by using an assist processor that performs data speculation and that executes in advance of a primary processor. The system operates by executing executable code on the primary processor while simultaneously executing a reduced version of the executable code on the assist processor. This allows the assist processor to generate the same pattern of memory references that the primary processor generates in advance of when the primary processor generates the memory references. While executing the reduced version of the executable code, the system predicts a data value returned by a long latency operation within the executable code. The system subsequently uses the predicted data value to continue executing the reduced version of the executable code without having to wait for the long latency operation to complete.
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