System and method to manage address translation requests
US8301865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Mar 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/684
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for servicing translation lookaside buffer (TLB) misses may manage separate input and output pipelines within a memory management unit. A pending request queue (PRQ) in the input pipeline may include an instruction-related portion storing entries for instruction TLB (ITLB) misses and a data-related portion storing entries for potential or actual data TLB (DTLB) misses. A DTLB PRQ entry may be allocated to each load/store instruction selected from the pick queue. The system may select an ITLB- or DTLB-related entry for servicing dependent on prior PRQ entry selection(s). A corresponding entry may be held in a translation table entry return queue (TTERQ) in the output pipeline until a matching address translation is received from system memory. PRQ and/or TTERQ entries may be deallocated when a corresponding TLB miss is serviced. PRQ and/or TTERQ entries associated with a thread may be deallocated in response to a thread flush.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.