DMA (Direct Memory Access) message transfer method

Abstract

The invention provides a DMA (Direct Memory Access) message transfer method, which can be applied to a network card. The method comprises steps: a control core allocates a split packet buffer area for each data core from a memory; when the network card receives the message, the data core receives a message processing message of a network accelerator, length information of the message is acquired from the message, and if the message length is smaller than a preset message length, the message is stored in the split packet buffer area corresponding to the data core; if the message length is more than or equal to the preset message length, a DMA controller is started to execute DMA operation to transfer the message to a server; if the total length of all messages in the split packet buffer area corresponding to the data core is more than or equal to the preset message length, the DMA controller is started to execute DMA operation to transfer the message to the server; and if the total message length is smaller than the preset message length, no operation is carried out. The DMA operation times can be effectively reduced, the effective utilization rate of the PCIE channel bandwidth is improved, and the packet receiving rate of network card small packets is enhanced.

Description

technical field [0001] The invention relates to the field of network data processing, in particular to a method for DMA transmitting messages. Background technique [0002] With the rapid development of network technology, network bandwidth is growing rapidly at a rate of nearly three times each year. At present, 10G networks have begun to be deployed to some end systems, which has brought great pressure to network traffic analysis applications. As the core technologies of the Next Generation Internet (NGI), such as IPV6 / MPLS, routing protocols, and QOS technologies continue to mature, the Internet has entered a critical stage of evolution to the next generation. The development of various networks presents a trend of high bandwidth and high traffic. Therefore, it is particularly important to greatly improve the performance and processing capabilities of network equipment. [0003] As a high-performance network device that provides users with shared information resources an...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the smaller the packet length, the lower the effective utilization rate of the PCI-E channel bandwidth due to the increase in the number of control protocols it carries.

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