Control system and method for jumbo frame in switching control circuit

Abstract

The invention discloses a control system and method for jumbo frames in a switching control circuit. The system comprises a description priority scheduling module, a transmit queue management module, a cache label queue management module and an idle queue management module, wherein the description priority scheduling module is used to select a queue that is first scheduled from a plurality of priority queues according to the scheduling strategy and to send the first descriptor address of the queue to the transmit queue management module; the transmit queue management module carries out read or write operations to the descriptor transmit queue according to the received data or sending data, and implements linked list management on each priority queue according to the priority information; the cache label queue management module implements linked list management on the cache occupied by each data frame through the cache label contained in the descriptor which is stored in the transmit queue; and the idle queue management module is used to release and recover the storage addresses of the transmit queue table item and the cache label table item. By adopting the control system and method disclosed by the invention, the efficiency of reading and writing the descriptor and the cache labels can be increased.

Description

technical field [0001] The invention relates to a network data communication technology applied to data processing in network equipment of the Ethernet protocol, in particular to a control system and method for jumbo frames in an exchange control circuit. Background technique [0002] With the rapid development of Ethernet technology, the rate of switches is also from 10Mbps, 100Mbps to 1Gbps, 10Gbps or even higher. Initially, the Ethernet standard approved by IEEE had a maximum frame length of 1518 bytes, but this standard has increasingly become a constraint on data transmission efficiency. Jumbo Frame, which is a manufacturer-standard ultra-long frame format, is specially designed for Ethernet over 1Gbps. The length varies from manufacturer to manufacturer, ranging from 9000 bytes to 64000 bytes. The use of jumbo frames can make the Ethernet transmission data performance fully play, and the data transmission efficiency can be increased by 50% to 100%. [0003] In the sw...

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Problems solved by technology

[0004] In the design of the descriptor, if a page is 256 bytes as the premise, in a switch whose longest frame only supports 1518 bytes, designing a descriptor or an extended type of descriptor corresponding to a

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