Data transmission method and system between DPDK user mode and linux kernel network protocol stack

Abstract

The invention discloses a data transmission method and system between a DPDK user mode and a linux kernel network protocol stack. The method comprises the following steps: creating N virtual network ports bound with each physical network port for each physical network port by utilizing the KNI module of the DPDK, independently binding a kernel thread for each virtual network port, creating a bondport in a polling manner by utilizing a linux system command, and binding the N virtual network ports to the same bond port; after the DPDK receives the network data packet through the physical network port, distributing the received data packet to N virtual network ports bound with the physical network port in a KNI interface polling mode; the kernel protocol stack sends the processed data packets needing to be sent to the bond port to the N virtual network ports of the bond port in a polling mode, and the DPDK reads the data packets from the virtual network ports through the KNI interface and then sends the data packets to the physical network port; Therefore, the load is balanced, the linux kernel directly drives the network card, the performance bottleneck is broken through and the performance that the data packet enters and exits the kernel is improved.

Description

technical field [0001] The invention relates to the field of computers, in particular to a data transmission method and system between a DPDK user state and a Linux kernel network protocol stack. Background technique [0002] As a zero-copy user mode NIC driver, DPDK has high performance. In practical applications, there are often some specific data packets that need to be processed by the linux kernel mode network protocol stack. The transmission between the DPDK user-mode network data packet and the kernel-mode network protocol stack is through the KNI module. Usually, a physical network port is created as a virtual network port, and the transmission is performed between the virtual network port and the kernel protocol stack. [0003] When a single physical network port corresponds to a virtual network port, the KNI module of DPDK creates a kernel thread to receive data packets. Under heavy traffic conditions, the Linux kernel protocol stack has a relatively high soft int...

AI Technical Summary

Problems solved by technology

[0003] When a single physical network port corresponds to a virtual network port, the KNI module of DPDK creates a kernel thread to receive data packets. Under heavy traffic conditions, the Linux kernel protocol stack has a relatively high soft interrupt for receiving packets on a single CPU, and kernel packet loss causes performance bottlenecks.

So that the performance of this method is not as good as that of the linux kernel directly driving the network card, and the performance of data packets entering and leaving the kernel

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