Coherent attached processor proxy supporting master parking
US9146872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2013 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Jun 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0831
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In response to receiving a memory access request and expected coherence state at an attached processor at a coherent attached processor proxy (CAPP), the CAPP determines that a conflicting request is being serviced. In response to determining that the CAPP is servicing a conflicting request and that the expected state matches, a master machine of the CAPP is allocated in a Parked state to service the memory access request after completion of service of the conflicting request. The Parked state prevents servicing by the CAPP of a further conflicting request snooped on the system fabric. In response to completion of service of the conflicting request, the master machine transitions out of the Parked state and issues on the system fabric a memory access request corresponding to that received from AP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.