Methods and apparatus for prediction of the time between two consecutive memory accesses
US6539440B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1999 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Nov 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0215
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
According to the present invention, a method for very fast calculation of the earliest command issue time for a new command issued by a memory controller is disclosed. The memory controller includes N page status registers each of which includes four page timers such that each of the page timers store a period of time between a last issued command to the particular page and a predicted next access to the memory, wherein the next access to the same page can be “close”, “open”, “write” or “read”. An incoming new command is received and it is then determined how long a particularly page access has to wait before the issue. An appropriate contents of a command timing lookup table is selected by the new command. A new time value is written into appropriate page timers that has to be inserted between the new command and a possible next access to the same page.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.