| 摘要 |
One embodiment of the present invention provides a system that facilitates speculative load operations in a multiprocessor system. This system operates by maintaining a record at an L2 cache of speculative load operations that have returned data values through the L2 cache to associated L1 caches, wherein a speculative load operation is a load operation that is speculatively initiated before a preceding load operation has returned. In response to receiving an invalidation event, the system invalidates a target line in the L2 cache. The system also performs a lookup in the record to identify affected L1 caches that are associated with speculative load operations that may be affected by the invalidation of the target line in the L2 cache. Next, the system sends replay commands to the affected L1 caches in order to replay the affected speculative load operations, so that the affected speculative load operations take place after invalidation of the target line in the L2 cache. |
