I am using meson to configuration and ninja to build DPDK application and also i find the solution on my own Here the Feb 7, 2016 · The document provides an overview of the DPDK KNI interface, focusing on high-level architecture, data reception and transmission paths in both user space and kernel space, and the associated DPDK libraries. The DPDK Kernel NIC Interface (KNI) allows userspace applications access to the Linux* control plane. /build/kni -c 0xf0 -n 4 -- -P -p 0x3 -config=" (0,4,6,8), (1,5,7,9)" you need to check your "config" inputs (should be 4 elements for each port). The KNI supports faster and simpler packet processing, standard Linux net tools, and vHost-net integration. /rte_kni. --config="(port id, rx lcore, tx lcore, kthread lcore, kthread lcore, )": Port and cores selection. 14. h. Stephen Hemminger Thu, 8 Sep 2016 09:44:42 -0700 On Fri, 9 Sep 2016 10:46:07 +0800 zhouyangchao <zhouyates at gmail. Learn how to use the DPDK KNI to access the Linux control plane from userspace applications. 0-105-generic #115~20. 一、KNI KNI全称：Kernel NIC Interface，内核网卡接口，允许用户态程序访问linux控制平面。在DPDK报文处理中，有些报文需要发送到内核协议栈进行处理，如GTP-C控制报文 如果报文数量较少，可以使用内核提供的TAP/… Jan 8, 2013 · RTE KNI The KNI library provides the ability to create and destroy kernel NIC interfaces that may be used by the RTE application to receive/transmit packets from/to Linux kernel net interfaces. Oct 11, 2017 · The DPDK creates FIFO queues for packet ingress and egress to the kernel module for each device allocated. When the rte_kni module is loaded, it will create a device /dev/kni that is used by the DPDK KNI API functions to control and communicate with the kernel module. 2. Learn how to use the DPDK KNI to access the Linux control plane from userspace applications. 15. 35. Sep 9, 2024 · In DPDK 24. 11. This application supports two parameters for itself. 0-rc0 : virtio-user and vhost in kernel space are an alternative to DPDK KNI for transferring packets between a DPDK packet processing application and the kernel stack. KNI Poll Mode Driver KNI PMD is wrapper to the librte_kni library. 18. The interface name and FIFO details are provided by the application through an ioctl call using the rte_kni_device_info struct which contains: Performance Similar to KNI, this solution would use one or more kthreads to send/receive packets to/from user space DPDK applications, which minimises the impact on the polling DPDK threads. The DPDK KNI Kernel Module The KNI kernel loadable module rte_kni provides the kernel interface for DPDK applications. This library provides two APIs to burst receive packets from KNI interfaces, and burst transmit packets to KNI interfaces. The KNI interfaces are created by a DPDK application dynamically. Dec 25, 2023 · 1：kni概述（内核网卡接口Kernel NIC Interface） dpdk提供了kni模块，实现了dpdk应用程序与内核数据的交互。 dpdk接管网卡数据后，内核其实就无法识别到网卡数据了。 dpdk提供了kni模块，用虚拟网络适配器（模拟了一个网卡），实现了dpdk应用程序和内核网络模块的交互。 什么是kniKni(Kernel NIC Interface)内核网卡接口，是DPDK允许用户态和内核态交换报文的解决方案，模拟了一个虚拟的网口，提供dpdk的应用程序和linux内核之间通讯。kni接口允许报文从用户态接收后转发到linu协议栈… Apr 29, 2019 · KNI在DPDK中的作用是什么？ DPDK中的KNI如何实现数据包处理？ KNI与DPDK的其他组件有何交互？ 机器之心报道 机器之心编辑部 让巴赫弹摇滚会是什么样的体验？ 在最近谷歌主页的Doodle上，我们可以尝试一下。 May 26, 2017 · 首先来看 init_kni()，这个函数主要对kni设备对应的queue等进行分配，需要注意的是一个物理接口可以对应1个或者多个kni设备，通过在命令行中配置，但推荐每个物理接口对应一个KNI设备，在文档上有如下的解释： The kni application is run with EAL parameters and parameters for the application itself. Additionally, it references resources like the DPDK programmer’s Jul 31, 2015 · The issue in KNI application is that, it won't show errors directly if there are issues with DMA mapping. ports Oct 23, 2021 · kni的整体的整体实现原理是采用共享内存方式，如下图通过DPDK创建rx_q，tx_q，并将其地址传递给kni内核模块，来实现rx_q和tx_q的内存共享，之后DPDK和内核就可以将数据放入对应的共享内存队列中完成报文的收发。 下面分别介绍kni的内核部分和用户态部分。 The DPDK kernel network interface (KNI) provides a way for the SSR to route traffic to the Linux OS for access to various USER space applications. For details about the EAL parameters, see the relevant DPDK Getting Started Guide.

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