USING NONSPECULATIVE OPERATIONS FOR LOCK ELISION

摘要

A method includes identifying a set of instructions to be executed as a transaction that is to access a section of memory, prior to executing the set of instructions as the transaction, facilitating a non-speculative access to a data cache, the data cache comprising a plurality of cache lines, each cache line comprising a lock to lock a respective portion of the memory, determining if the section of memory is available for the transaction in view of locks of the plurality of cache lines, and in response to a determination that the section of memory is not available, causing the non-speculative access to the data cache to be repeated.

主权项

1. A method comprising:
identifying, by a scheduler of an operating system executing on a processing device, a set of instructions to be executed as a transaction that is to access a section of memory; prior to executing the set of instructions as the transaction, facilitating a non-speculative access to a data cache coupled to the processing core, the data cache comprising a plurality of cache lines, each cache line comprising a lock to lock a respective portion of the memory; determining if the section of memory is available for the transaction in view of locks of the plurality of cache lines; and in response to a determination that the section of memory is not available, causing the non-speculative access to the data cache to be repeated.