Information processing apparatus and access control method capable of high-speed data access
US8060679B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2007 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/364
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Requestors acquire tokens before issuing access requests to a memory controller. The access requests issued are accumulated in a command queue of the memory controller. When the amount of access requests accumulated in the command queue is smaller than or equal to a first threshold, or in level 0, tokens are generated at a rate equivalent to 200% of a bus bandwidth. If the amount of accumulation is greater than the first threshold and is smaller than or equal to a second threshold, i.e., in level 1, tokens are generated at a rate equivalent to the bus bandwidth. If the amount of accumulation exceeds the second threshold, the token generation is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.