Optimizing grace period detection for preemptible read-copy update on uniprocessor systems
US7953708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2008 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Nov 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/30087
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique for optimizing grace period detection following a data element update operation that affects preemptible data readers. A determination is made whether the data processing system is a uniprocessor system or a multiprocessor system. Grace period detection processing is performed using a first grace period detection technique if the data processing system is a multiprocessor system. Grace period detection processing is performed using a second grace period detection technique if the data processing system is a uniprocessor system. The grace period detection processing according to either technique determines the end of a grace period in which readers that are subject to preemption have passed through a quiescent state and cannot be maintaining references to the pre-update view of the shared data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.