Instruction to cancel outstanding cache prefetches
US9535696B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2016 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Jan 4, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/6026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques relate to handling outstanding cache miss prefetches. A processor pipeline recognizes that a prefetch canceling instruction is being executed. In response to recognizing that the prefetch canceling instruction is being executed, all outstanding prefetches are evaluated according to a criterion as set forth by the prefetch canceling instruction in order to select qualified prefetches. In response to evaluating, a cache subsystem is communicated with to cause canceling of the qualified prefetches that fit the criterion. In response to successful canceling of the qualified prefetches, a local cache is prevented from being updated from the qualified prefetches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.