Store queue with token to facilitate efficient thread synchronization
US9280343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2009 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Dec 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/522
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Some embodiments of the present invention provide a system for operating a store queue, wherein the store queue buffers stores that are waiting to be committed to a memory system in a processor. During operation, the system examines an entry at the head of the store queue. If the entry contains a membar token, the system examines an unacknowledged counter that keeps track of the number of store operations that have been sent from the store queue to the memory system but have not been acknowledged as being committed to the memory system. If the unacknowledged counter is non-zero, the system waits until the unacknowledged counter equals zero, and then removes the membar token from the store queue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.