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pktgen使用手册.pdf

发布时间：2022-06-07 发布人：admin 分类：说明书 资料大小：0.17M 资料格式：pdf 举报 版权申诉
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    Getting Started with Pktgen
    Running Pktgen
    EAL Commandline Options
    Pktgen Commandline Options
    Multiple Instances of Pktgen or other application
    Runtime Options and Commands
    Running Script Files
    Using Lua with Pktgen
    Socket Support for Pktgen
    Changes in Pktgen
    Copyright and License
    Third Party License Notices
    Pktgen Documentation Release 2.7.7 Keith Wiles Apr 20, 2017
    1 Getting Started with Pktgen 2 Running Pktgen 3 EAL Commandline Options 4 Pktgen Commandline Options 5 Multiple Instances of Pktgen or other application 6 Runtime Options and Commands 7 Running Script Files 8 Using Lua with Pktgen 9 Socket Support for Pktgen 10 Changes in Pktgen 11 Copyright and License 12 Third Party License Notices Contents 3 7 11 13 17 19 33 35 41 43 45 47 i
    ii
    Pktgen Documentation, Release 2.7.7 Pktgen, (Packet Gen-erator) is a software based traffic generator powered by the DPDK fast packet processing framework. Some of the features of Pktgen are: • It is capable of generating 10Gbit wire rate traffic with 64 byte frames. • It can act as a transmitter or receiver at line rate. • It has a runtime environment to configure, and start and stop traffic flows. • It can display real time metrics for a number of ports. • It can generate packets in sequence by iterating source or destination MAC, IP addresses or ports. • It can handle packets with UDP, TCP, ARP, ICMP, GRE, MPLS and Queue-in-Queue. • It can be controlled remotely over a TCP connection. • It is configurable via Lua and can run command scripts to set up repeatable test cases. • The software is fully available under a BSD licence. Pktgen was created 2010 by Keith Wiles @ windriver.com, now at intel.com Contents 1
    Pktgen Documentation, Release 2.7.7 2 Contents
    CHAPTER 1 Getting Started with Pktgen This section contains instructions on how to get up and running with DPDK and the pktgen traffic generator application. These instructions relate to setting up DPDK and pktgen on an Ubuntu desktop system. How- ever, the should work on any recent Linux system with kernel support for hugeTLB/hugepages. System requirements The main system requirement is that the DPDK packet processing framework is supported. The DPDK Linux Getting Started Guide has a section on the System Requirements that ex- plains the BIOS, System and Toolchain requirements to compile and run a DPDK based appli- cation such as pktgen. Ensure that your system meets those requirements before proceeding. You will also need a DPDK supported NIC. The current version of pktgen was developed and tested using Ubuntu 13.10 x86_64, kernel version 3.5.0-25, on a Westmere Dual socket board running at 2.4GHz with 12GB of ram 6GB per socket. Setting up hugeTLB/hugepage support To get hugeTLB/hugepage support your Linux kernel must be at HUGETLBFS kernel option must be enabled. The DPDK Linux Getting Started Guide has a section on the Use of Hugepages in the Linux Environment. least 2.6.33 and the Once you have made the required changed make sure you have HUGE TLB support in the kernel with the following commands: 3
    Pktgen Documentation, Release 2.7.7 $ grep -i huge /boot/config-2.6.35-24-generic CONFIG_HUGETLBFS=y CONFIG_HUGETLB_PAGE=y $ grep -i huge /proc/meminfo HugePages_Total: HugePages_Free: HugePages_Rsvd: HugePages_Surp: Hugepagesize: 128 128 0 0 2048 kB The values in Total and Free may be different depending on your system. You will need to edit the /etc/sysctl.conf file to setup the hugepages size: $ sudo vi /etc/sysctl.conf Add to the bottom of the file: vm.nr_hugepages=256 You can configure the vm.nr_hugepages=256 as required. small will effect the performance of pktgen or cause it to terminate on startup. You will also need to edit the /etc/fstab file to mount the hugepages at startup: $ sudo vi /etc/fstab Add to the bottom of the file: huge /mnt/huge hugetlbfs defaults 0 0 In some cases making it too $ sudo mkdir /mnt/huge $ sudo chmod 777 /mnt/huge You should also reboot your machine as the huge pages must be setup just after boot to make sure there is enough contiguous memory for the 2MB pages. Note: If you start an application that makes extensive use of hugepages, such as Eclipse or WR Workbench, before starting pktgen for the first time after reboot, pktgen may fail to load. In this case you should close the other application that is using hugepages. BIOS settings In the BIOS make sure that the HPET High Precision Event Timer is enabled. Also make sure hyper-threading is enabled. See the DPDK documentation on enabling additional BIOS functionality for more details. Terminal display The pktgen output display requires 132 columns and about 42 lines to display correctly. The author uses an xterm of 132x42, but you can also have a larger display and maybe a bit smaller. If you are displaying more then 4-6 ports then you will need a wider display. 4 Chapter 1. Getting Started with Pktgen
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