| 摘要 |
One embodiment of the present invention provides a system that facilitates speculative load operations in a multiprocessor system. The system operates by maintaining a record of speculative load operations that have completed at a processor in the multiprocessor system, wherein a speculative load operation is a load operation that is speculatively initiated before a preceding load operation has returned. Next, the system receives an invalidation signal at an L1 cache that is coupled to the processor, wherein the invalidation signal indicates that a specific line in the L1 cache is to be invalidated. In response to this invalidation signal, the system examines the record of speculative load operations to determine if there exists a matching speculative load operation that is completed and is directed to the same location in the L1 cache that the invalidation signal is directed to. If there exists a matching speculative load operation, the system replays the matching speculative load operation so that the matching speculative load operation takes place after an event that caused the invalidation signal completes.
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