Search performance test method and system for content-addressing memory

Abstract

The invention relates to a technique of a CAM, in particular to the technique for testing a CAM devices, a method for testing the searching performance of a content addressing memorizer, which is characterized by comprising the following steps: orderly searching testing data which is written into a corresponding memorizing space of each index number according to the non-sequential arrangement order of each storing space index number in the content addressing memorizer through a business bus of the content addressing memorizer by the device with a high-speed bus interface, and confirming the searching performance of the content addressing memorizer according to the correctness of the corresponding index numbers of testing data in the memorizing space, which are returned by the business bus. The invention further provides a system for testing the searching performance of a content addressing memorizer. Since a programmable device with the high-speed interface ability is adopted to search the testing data which is written into the CAM device according to the searching order, thereby testing the searching performance of the CAM under the conditions of rapid searching speed and frequently turning of a business bus electrical level.

Description

technical field [0001] The present invention relates to CAM (Content Addressable Memory, content addressable memory) technology, in particular to a CAM search performance testing method and system. Background technique [0002] Modern society and technology rely more and more on information or data. Various data are stored or saved, accessed or retrieved, and modified or updated. [0003] The traditional data storage and query methods mainly use high-speed processors to read or write the storage content of RAM (Random Access Memory) storage devices, and use complex algorithms to query the information stored in RAM. This method has very strict requirements on the speed of the processor, and because of the algorithm, it is almost impossible to perform real-time query for broadband network systems. The search and search speed of the network is at least 40 times the processing speed of the current network processor, which cannot meet the needs of the network. [0004] Using a...

AI Technical Summary

Problems solved by technology

[0016] The inventor finds that although this scheme can reach the purpose of testing the CAM at line speed, there is a big defect in the test: because the level of the bus or the internal working register is 1 or 0 for a long time in the test process, the level reversal strength is not enough, and there is no It can test the search performance when the bus or internal working register level of CAM is frequently flipped

[0017] So the above-mentioned testing method of prior art, although certain test has been done to the search performance of CAM, fail to test the search performance of CAM at high speed, and the level of bus or internal working register flips frequently

Images