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Content searching method for chip

A chip and content technology, applied in the field of chip content search, can solve the problems of reducing power consumption, etc., and achieve the effects of reducing power consumption, improving search speed, and fast search

Active Publication Date: 2020-05-19
芯启源(南京)半导体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are applicable to the back-end design process of the chip, and do not involve the front-end process that can significantly reduce power consumption

Method used

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  • Content searching method for chip
  • Content searching method for chip
  • Content searching method for chip

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Experimental program
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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0031] figure 1 It is a schematic diagram of interaction between a host and a chip according to the present invention. Wherein, the HOST host is generally a high-performance general-purpose processor (CPU), such as commonly used CPUs such as IntelX86, ARM or MIPS, and the search chip is generally a TCAM or CAM chip. The HOST host configures the width and depth of the rule sub-table according t...

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Abstract

The invention discloses a content searching method for a chip, which comprises the following steps of: decomposing a large rule containing tens of thousands of rules into a plurality of rule sub-tables according to a selected pre-classification function, realizing the depth of each rule sub-table to a single digit, and ensuring that each rule only appears in one rule sub-table through the pre-classification function. According to the method, the rules are pre-classified, so that real search only needs to be carried out in the rule sub-tables, the comparison frequency can be reduced from tens of thousands of times to several times, the comparison frequency is greatly reduced, the chip search speed is greatly increased, and the content search time of the chip is greatly reduced.

Description

technical field [0001] The invention belongs to the field of integrated circuits, and more specifically relates to a content search method for chips. Background technique [0002] With the rapid development of information technology, semiconductor chips are widely used in various fields of society. In recent years, the functions of chips have become more and more complex, and the number of logic gates has increased exponentially. At the same time, the power consumption of the chip is getting higher and higher, causing the power consumption of the chip to become an increasingly important design index in chip design. Because low power consumption can significantly reduce the complexity of chip and board-level cooling systems, improve the battery life of mobile devices, and reduce the power supply requirements of the system. [0003] At present, the most commonly used ASIC chips for content search are TCAM (Ternary Content Addressable Memory) and CAM (Content Addressable Memo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/2455G06F16/28G06F16/22
CPCG06F16/2455G06F16/284G06F16/2255Y02D10/00
Inventor 项禹卢笙陈盈安姜欣侯贺曦王栋栋
Owner 芯启源(南京)半导体科技有限公司