Method and device for increasing efficiency of DDR (Double Data Rate) controller

Abstract

The invention relates to the field of data communication and provides a method for increasing efficiency of a DDR (Double Data Rate) controller. The method comprises the following steps of caching and managing user commands in the form of queue according to a time sequence; comparing other commands in the queue with the current operation command to obtain relationships between the other commands and the current operation command; preferentially extracting a command which shares bank and row with the current operation command and outputting the command to a double data rate synchronous dynamic cache DDR when the first input command is in a waiting state. The invention also provides a device for increasing efficiency of the DDR controller. By using the device or method for increasing efficiency of the DDR controller, provided by the invention, the data output delay can be reduced while the bandwidth efficiency of the DDR is increased, and the space consumption of internal static cache is saved.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a method and a device for improving the efficiency of a DDR controller. Background technique [0002] At present, the bandwidth required for high-speed data storage is increasing. DDR (Double Data Rate, double data rate synchronous dynamic cache) has become a commonly used device in the field of data storage due to various factors such as price. However, due to the time parameter constraints caused by the refresh operation inside the DDR and various internal structures, the overall bandwidth utilization rate is not high. [0003] In the operation of DDR, when the relationship between adjacent commands is the same as BANK (storage bank) and ROW (row), you can send read or write commands continuously without sending additional commands, so you don’t have to wait for the corresponding delay, and finally you can Long-term effective data appears on the data bus of DDR, whi...

AI Technical Summary

Problems solved by technology

The focus of this strategy is only on the operation efficiency of DDR, and it cannot take into account the input sequence of user commands before and after. It is easy to cause the previously entered commands to be out of service for a long time, resulting in increased data delay, or a large amount of data is backlogged in the static cache. , wasting static cache resources

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