Method and system for improving data search rate in DRAM

Abstract

The invention discloses a method and system for improving the data search rate in a DRAM, and relates to the technical field of memories. An execution device for data search is provided with a plurality of DRAM devices. The method comprises the following steps: obtaining the total number of the DRAM devices and the number of Bank groups in each DRAM device, wherein each Bank group at least comprises one Bank; performing mirror image copying on the to-be-stored data, and respectively storing the to-be-stored data into each Bank group; and establishing a search rule corresponding to the to-be-stored data, wherein the search rule records the storage addresses of the to-be-stored data and the search sequence corresponding to the storage addresses. According to the invention, the access time sequence limitation of the DRAM equipment is broken through, the data search rate in the DRAM is effectively improved, and the read-write working efficiency of the memory is further effectively improved.

Description

technical field [0001] The invention relates to the technical field of memory, in particular to a method and system for improving the data search rate in DRAM. Background technique [0002] At this stage, the rate of access to DRAM devices is limited by the timing requirements of the DRAM device itself. In practical applications, the contents of the table items that need to be searched are stored in the Bank of the DRAM; [0003] When two lookup requests, that is, the interval between the two requests to read the contents of the table entries in the Bank, is limited by the timing requirements between the two read operations of the DRAM, the minimum interval is tRC, and the DRAM is searched multiple times. The rate of the table will be limited by the tRC of the DRAM, and the minimum interval is mainly determined by the characteristics of the DRAM itself; [0004] In addition, DRAM can only hold data for a short time. In order to keep data, DRAM uses capacitor storage, so it ...

AI Technical Summary

Problems solved by technology

[0004] In addition, DRAM can only hold data for a short time. In order to keep data, DRAM uses capacitor storage, so it must be refreshed every once in a while. If the storage unit is not refreshed, the stored information will be lost. During the refresh operation, it is Reading and writing operations on DRAM are not allowed, so at this point, the rate of searching the DRAM table is also affected to a certain extent;

[0005] The table that needs to be looked up is placed in a certain Bank of DRAM. When accessing the Bank, it is also limited by the access time of the same Bank. To meet the minimum time interval tRRD_L and tCCD_L, the rate of multiple lookups for DRAM tables will be limited. tRRD_L and tCCD_L limited to DRAM;

Images