The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2025
Filed:
Aug. 16, 2021
Arm Limited, Cambridge, GB;
Wei Wang, Cambridge, GB;
Matthew James Horsnell, Cambridge, GB;
Arm Limited, Cambridge, GB;
Abstract
An apparatus has processing circuitry with support for transactional memory, and a cache hierarchy comprising at least two levels of cache. In response to a draining trigger event having potential to cause loss of state stored in at least one further level cache beyond a predetermined level cache in which speculative store data generated by a transaction is marked as speculative until the transaction is committed, draining circuitry performs a draining operation to scan a subset of the cache hierarchy to identify dirty cache lines and write data associated with the dirty cache lines to persistent memory. The subset of the cache hierarchy includes the at least one further level cache. In the draining operation, speculative store data marked as speculative in the predetermined level cache is prevented from being drained to the persistent memory.