System, Method, and Apparatus for Improving Throughput of Consecutive Transactional Memory Regions

摘要

Systems, apparatuses, and methods for improving TM throughput using a TM region indicator (or color) are described. Through the use of TM region indicators younger TM regions can have their instructions retired while waiting for older TM regions to commit.

主权项

1. An apparatus comprising:
execution circuitry to execute each instruction of a transaction; a buffer to maintain a mapping from architectural registers to physical registers, wherein the buffer to maintain a plurality of register checkpoints for a plurality of transactional memory (TM) regions by tracking indicators between TM regions to identify a position in the buffer of the last committed instruction and identify a boundary between a youngest TM region and a currently retiring instruction position; a data cache to store data associated with executed instructions, wherein each entry of the data cache has a bit per TM region indicator to mark memory state of speculative reads wherein a read-bit for a TM region is set when data is speculatively read from that cache line during that transaction and a write-bit is set to indicate when the cache line has speculatively written data.