Non-uniform memory access (NUMA) data processing system having a page table including node-specific data storage and coherency control
US6658538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Sep 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1009
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-uniform memory access (NUMA) data processing system includes a plurality of nodes coupled to a node interconnect. The plurality of nodes contain a plurality of processing units and at least one system memory having a table (e.g., a page table) resident therein. The table includes at least one entry for translating a group of non-physical addresses to physical addresses that individually specifies control information pertaining to the group of non-physical addresses for each of the plurality of nodes. The control information may include one or more data storage control fields, which may include a plurality of write through indicators that are each associated with a respective one of the plurality of nodes. When a write through indicator is set, processing units in the associated node write modified data back to system memory in a home node rather than caching the data. The control information may further include a data storage control field comprising a plurality of non-cacheable indicators that are each associated with a respective one of the plurality of nodes. When a non-cacheable indicator is set, processing units in the associated node are instructed to not cache data ass…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.