Requesting device capable of canceling its memory access requests upon detecting other specific requesting devices simultaneously asserting access requests
US5748968A · kind A · utility
14Cited by
10References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Jan 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/128
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A memory bandwidth allocation scheme in a computer system having a unified memory architecture. When a first device requesting access to a resource detects that two higher priority devices are also requesting access to the same resource, the first device shuts itself down. Accordingly, the first device deactivates its access request signals and clears its buffers. Then, the first device reactivates itself when it receives a graphics VSYNC signal. This allocation scheme ensures that the arbiter will not get stuck in a loop serving only high priority requests and not serving lower priority requests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.