6. 使用脚本快速构建¶
usertools目录中的dpdk-setup.sh脚本，向用户提供了快速执行如下任务功能:
- 构建DPDK库
- 加载/卸载DPDK IGB_UIO内核模块
- 加载/卸载VFIO内核模块
- 加载/卸载DPDK KNI内核模块
- 创建/删除NUMA 或 non-NUMA平台的hugepages
- 查看网络端口状态和预留给DPDK应用程序使用的端口
- 设置非root用户使用VFIO的权限
- 运行test和testpmd应用程序
- 查看meminfo中的hugepages
- 列出在
/mnt/huge中的hugepages - 删除内置的DPDK库
对于其中一个EAL目标，一旦完成了这些步骤，用户就可以编译自己的在EAL库中链接的应用程序来创建DPDK映像。
6.1. 脚本组织¶
dpdk-setup.sh脚本在逻辑上组织成用户按顺序执行的一系列步骤。每个步骤都提供了许多选项来指导用户完成所需的任务。以下是每个步骤的简单介绍：
Step 1: Build DPDK Libraries
最开始，用户必须指定tagert的类型以便编译正确的库。
如本入门指南前面的章节描述，用户必须在此之前就安装好所有的库、模块、更新和编译器。
Step 2: Setup Environment
用户需要配置Linux* 环境以支持DPDK应用程序的运行。 可以为NUMA 或non-NUMA系统分配Hugepages。任何原来已经存在的hugepages将被删除。 也可以在此步骤中插入所需的DPDK内核模块，并且可以将网络端口绑定到此模块供DPDK使用。
Step 3: Run an Application
一旦执行了其他步骤，用户就可以运行test程序。该程序允许用户为DPDK运行一系列功能测试。也可以运行支持数据包接收和发送的testpmd程序。
Step 4: Examining the System
此步骤提供了一些用于检查Hugepage映射状态的工具。
Step 5: System Cleanup
最后一步具有将系统恢复到原始状态的选项。
6.2. Use Cases¶
以下是使用dpdk-setup.sh的示例。脚本应该使用source命令运行。脚本中的某些选项在继续操作之前提示用户需要进一步的数据输入。
Warning
必须与root全选运行dpdk-setup.sh。
source usertools/dpdk-setup.sh
------------------------------------------------------------------------
RTE_SDK exported as /home/user/rte
------------------------------------------------------------------------
Step 1: Select the DPDK environment to build
------------------------------------------------------------------------
[1] i686-native-linuxapp-gcc
[2] i686-native-linuxapp-icc
[3] ppc_64-power8-linuxapp-gcc
[4] x86_64-native-bsdapp-clang
[5] x86_64-native-bsdapp-gcc
[6] x86_64-native-linuxapp-clang
[7] x86_64-native-linuxapp-gcc
[8] x86_64-native-linuxapp-icc
------------------------------------------------------------------------
Step 2: Setup linuxapp environment
------------------------------------------------------------------------
[11] Insert IGB UIO module
[12] Insert VFIO module
[13] Insert KNI module
[14] Setup hugepage mappings for non-NUMA systems
[15] Setup hugepage mappings for NUMA systems
[16] Display current Ethernet device settings
[17] Bind Ethernet device to IGB UIO module
[18] Bind Ethernet device to VFIO module
[19] Setup VFIO permissions
------------------------------------------------------------------------
Step 3: Run test application for linuxapp environment
------------------------------------------------------------------------
[20] Run test application ($RTE_TARGET/app/test)
[21] Run testpmd application in interactive mode ($RTE_TARGET/app/testpmd)
------------------------------------------------------------------------
Step 4: Other tools
------------------------------------------------------------------------
[22] List hugepage info from /proc/meminfo
------------------------------------------------------------------------
Step 5: Uninstall and system cleanup
------------------------------------------------------------------------
[23] Uninstall all targets
[24] Unbind NICs from IGB UIO driver
[25] Remove IGB UIO module
[26] Remove VFIO module
[27] Remove KNI module
[28] Remove hugepage mappings
[29] Exit Script
Option:
以下选项演示了 “x86_64-native-linuxapp-gcc“ DPDK库的创建。
Option: 9
================== Installing x86_64-native-linuxapp-gcc
Configuration done
== Build lib
...
Build complete
RTE_TARGET exported as x86_64-native-linuxapp-gcc
以下选项用于启动DPDK UIO驱动程序。
Option: 25
Unloading any existing DPDK UIO module
Loading DPDK UIO module
以下选项演示了在NUMA系统中创建hugepage。为每个node分配1024个2MB的页。 应用程序应该使用 -m 4096 来启动，以便访问这两个内存区域。(如果没有 -m 选项，则自动完成)。
Note
如果显示提示以删除临时文件，请输入’y’。
Option: 15
Removing currently reserved hugepages
mounting /mnt/huge and removing directory
Input the number of 2MB pages for each node
Example: to have 128MB of hugepages available per node,
enter '64' to reserve 64 * 2MB pages on each node
Number of pages for node0: 1024
Number of pages for node1: 1024
Reserving hugepages
Creating /mnt/huge and mounting as hugetlbfs
以下操作说明了启动测试应用程序以在单个core上运行
Option: 20
Enter hex bitmask of cores to execute test app on
Example: to execute app on cores 0 to 7, enter 0xff
bitmask: 0x01
Launching app
EAL: coremask set to 1
EAL: Detected lcore 0 on socket 0
...
EAL: Master core 0 is ready (tid=1b2ad720)
RTE>>
6.3. 应用程序¶
一旦用户运行和dpdk-setup.sh脚本，构建了目标程序并且设置了hugepages，用户就可以继续构建和运行自己的应用程序或者源码中提供的示例。
/examples 目录中提供的示例程序为了解DPDK提供了很好的起点。 以下命令显示了helloworld应用程序的构建和运行方式。 按照4.2.1节，”应用程序使用的逻辑Core”描述，当选择用于应用程序的coremask时，需要确定平台的逻辑core的布局。
cd helloworld/
make
CC main.o
LD helloworld
INSTALL-APP helloworld
INSTALL-MAP helloworld.map
sudo ./build/app/helloworld -c 0xf -n 3
[sudo] password for rte:
EAL: coremask set to f
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Detected lcore 1 as core 0 on socket 1
EAL: Detected lcore 2 as core 1 on socket 0
EAL: Detected lcore 3 as core 1 on socket 1
EAL: Setting up hugepage memory...
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f0add800000 (size = 0x200000)
EAL: Ask a virtual area of 0x3d400000 bytes
EAL: Virtual area found at 0x7f0aa0200000 (size = 0x3d400000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7f0a9fc00000 (size = 0x400000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7f0a9f600000 (size = 0x400000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7f0a9f000000 (size = 0x400000)
EAL: Ask a virtual area of 0x800000 bytes
EAL: Virtual area found at 0x7f0a9e600000 (size = 0x800000)
EAL: Ask a virtual area of 0x800000 bytes
EAL: Virtual area found at 0x7f0a9dc00000 (size = 0x800000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7f0a9d600000 (size = 0x400000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7f0a9d000000 (size = 0x400000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7f0a9ca00000 (size = 0x400000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f0a9c600000 (size = 0x200000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f0a9c200000 (size = 0x200000)
EAL: Ask a virtual area of 0x3fc00000 bytes
EAL: Virtual area found at 0x7f0a5c400000 (size = 0x3fc00000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f0a5c000000 (size = 0x200000)
EAL: Requesting 1024 pages of size 2MB from socket 0
EAL: Requesting 1024 pages of size 2MB from socket 1
EAL: Master core 0 is ready (tid=de25b700)
EAL: Core 1 is ready (tid=5b7fe700)
EAL: Core 3 is ready (tid=5a7fc700)
EAL: Core 2 is ready (tid=5affd700)
hello from core 1
hello from core 2
hello from core 3
hello from core 0