【DPDK】虚拟机开发环境配置
正文
本文介绍的步骤基本适用于dpdk 1.7.0 - dpdk 2.0.0 各版本。只是setup.sh显示的菜单有一些小的不同；同样的，也适用于ubuntu更高版本（已在ubuntu 12.04+及14.04上验证过)
1. 所用系统与软件版本
系统：Ubuntu 12.04.3 LTS 64位， CentOS Linux release 7.0.1406 64位
dpdk: 1.7.0，http://www.dpdk.org/browse/dpdk/refs/。
dpdk 1.7.1 经过试验，发现在这两个系统上都有问题， 运行各示例程序都有以下错误
EAL: Error reading from file descriptor
这个bug已经由dpdk的开发人员修复，patch内容如下：
diff --gita/lib/librte_eal/linuxapp/igb_uio/igb_uio.cb/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index d1ca26e..c46a00f 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -505,14 +505,11 @@igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
}
/* fall back to INTX */
case RTE_INTR_MODE_LEGACY:
- if (pci_intx_mask_supported(dev)) {
- dev_dbg(&dev->dev, "using INTX");
- udev->info.irq_flags = IRQF_SHARED;
- udev->info.irq = dev->irq;
- udev->mode = RTE_INTR_MODE_LEGACY;
- break;
- }
- dev_notice(&dev->dev, "PCI INTX mask not supported\n");
+ dev_dbg(&dev->dev, "using INTX");
+ udev->info.irq_flags = IRQF_SHARED;
+ udev->info.irq = dev->irq;
+ udev->mode = RTE_INTR_MODE_LEGACY;
+ break;
/* fall back to no IRQ */
case RTE_INTR_MODE_NONE:
udev->mode = RTE_INTR_MODE_NONE;
在虚拟机里使用时，打上以上的补丁，或手工修改文件后重新编译即可。
2. 虚拟机配置
虚拟机软件：VMWare WorkStation 10.0.1 build-1379776
CPU： 2个CPU， 每个CPU2个核心
内存： 1GB+
网卡：intel网卡*2，用于dpdk试验；另一块网卡用于和宿主系统进行通信
3. Ubuntu 12.04上的配置
3.1 准备
需要安装gcc及其他一些小工具等，默认都有了，没有的话运行sudo apt-get install装一下。dkdk的一些脚本用到了python，也装一下。
3.2 通过setup脚本进行配置
首先运行su切换到root权限，root没有开的话使用sudo passwd roo，来开一下。
dpdk提供了一个方便的配置脚本：
1）设置环境变量，这里是linux 64位的配置
export RTE_SDK=
exportRTE_TARGET=x86_64-native-linuxapp-gcc
2）运行setup.sh，显示如下
------------------------------------------------------------------------------
RTE_SDK exported as /home/hack/dpdk-1.7.0
------------------------------------------------------------------------------
----------------------------------------------------------
Step1: Select the DPDK environment to build
----------------------------------------------------------
[1] i686-native-linuxapp-gcc
[2] i686-native-linuxapp-icc
[3] x86_64-ivshmem-linuxapp-gcc
[4] x86_64-ivshmem-linuxapp-icc
[5] x86_64-native-bsdapp-gcc
[6] x86_64-native-linuxapp-gcc
[7] x86_64-native-linuxapp-icc
----------------------------------------------------------
Step2: Setup linuxapp environment
----------------------------------------------------------
[8] Insert IGB UIO module
[9] Insert VFIO module
[10] Insert KNI module
[11] Setup hugepage mappings for non-NUMAsystems
[12] Setup hugepage mappings for NUMAsystems
[13] Display current Ethernet devicesettings
[14] Bind Ethernet device to IGB UIO module
[15] Bind Ethernet device to VFIO module
[16] Setup VFIO permissions
----------------------------------------------------------
Step3: Run test application for linuxapp environment
----------------------------------------------------------
[17] Run test application($RTE_TARGET/app/test)
[18] Run testpmd application in interactivemode ($RTE_TARGET/app/testpmd)
----------------------------------------------------------
Step4: Other tools
----------------------------------------------------------
[19] List hugepage info from /proc/meminfo
----------------------------------------------------------
Step5: Uninstall and system cleanup
----------------------------------------------------------
[20] Uninstall all targets
[21] Unbind NICs from IGB UIO driver
[22] Remove IGB UIO module
[23] Remove VFIO module
[24] Remove KNI module
[25] Remove hugepage mappings
[26] Exit Script
复制代码
选择6，进行编译
3）选择8， 插入igb_uio模块
4）选择11，配置大页内存（非NUMA），选择后会提示你选择页数，输入64，128什么的即可
Removing currently reserved hugepages
Unmounting /mnt/huge and removing directory
Input the number of 2MB pages
Example: to have 128MB of hugepages available, enter '64' to
reserve 64 * 2MB pages
Number of pages: 128
选择19，可以确认一下大页内存的配置：
AnonHugePages: 0 kB
HugePages_Total: 128
HugePages_Free: 128
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
5）选择14， 绑定dpdk要使用的网卡
Network devices using DPDK-compatibledriver
============================================
Network devices using kernel driver
===================================
0000:02:01.0 '82545EM Gigabit EthernetController (Copper)' if=eth0 drv=e1000 unused=igb_uio *Active*
0000:02:06.0 '82545EM Gigabit EthernetController (Copper)' if=eth1 drv=e1000 unused=igb_uio
0000:02:07.0 '82545EM Gigabit EthernetController (Copper)' if=eth2 drv=e1000 unused=igb_uio
Other network devices
=====================
Enter PCI address of device to bind to IGBUIO driver: 0000:02:06.0
绑定好后，选择13，可以查看当前的网卡配置：
Network devices using DPDK-compatibledriver
============================================
0000:02:06.0 '82545EM Gigabit EthernetController (Copper)' drv=igb_uio unused=e1000
0000:02:07.0 '82545EM Gigabit EthernetController (Copper)' drv=igb_uio unused=e1000
Network devices using kernel driver
===================================
0000:02:01.0 '82545EM Gigabit EthernetController (Copper)' if=eth0 drv=e1000 unused=igb_uio *Active*
Other network devices
=====================
6）选择18， 运行testpmd测试程序
注意，运行这个测试程序，虚拟机最好提供2个网卡用于dpdk。
Enter hex bitmask of cores to execute testpmd app on
Example: to execute app on cores 0 to 7, enter 0xff
bitmask: f
如果没问题，按回车后会出现以下输出：
Launching app
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Detected lcore 1 as core 1 on socket 0
EAL: Detected lcore 2 as core 0 on socket 0
EAL: Detected lcore 3 as core 1 on socket 0
EAL: Support maximum 64 logical core(s) byconfiguration.
EAL: Detected 4 lcore(s)
EAL: Setting up memory...
EAL: Ask a virtual area of 0xf000000 bytes
EAL: Virtual area found at 0x7fe828000000(size = 0xf000000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7fe827c00000(size = 0x200000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7fe827800000(size = 0x200000)
EAL: Ask a virtual area of 0x800000 bytes
EAL: Virtual area found at 0x7fe826e00000(size = 0x800000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0x7fe826800000(size = 0x400000)
EAL: Requesting 128 pages of size 2MB fromsocket 0
EAL: TSC frequency is ~3292453 KHz
EAL: Master core 0 is ready (tid=37c79800)
EAL: Core 3 is ready (tid=24ffc700)
EAL: Core 2 is ready (tid=257fd700)
EAL: Core 1 is ready (tid=25ffe700)
EAL: PCI device 0000:02:01.0 on NUMA socket-1
EAL: probe driver: 8086:100f rte_em_pmd
EAL: 0000:02:01.0 not managed by UIO driver, skipping
EAL: PCI device 0000:02:06.0 on NUMA socket-1
EAL: probe driver: 8086:100f rte_em_pmd
EAL: PCI memory mapped at 0x7fe837c23000
EAL: PCI memory mapped at 0x7fe837c13000
EAL: PCI device 0000:02:07.0 on NUMA socket-1
EAL: probe driver: 8086:100f rte_em_pmd
EAL: PCI memory mapped at 0x7fe837bf3000
EAL: PCI memory mapped at 0x7fe837be3000
Interactive-mode selected
Configuring Port 0 (socket 0)
Port 0: 00:0C:29:14:50:CE
Configuring Port 1 (socket 0)
Port 1: 00:0C:29:14:50:D8
Checking link statuses...
Port 0 Link Up - speed 1000 Mbps -full-duplex
Port 1 Link Up - speed 1000 Mbps -full-duplex
Done
testpmd>
输入start，开始包转发
testpmd> start
iopacket forwarding - CRC stripping disabled - packets/burst=32
nbforwarding cores=1 - nb forwarding ports=2
RXqueues=1 - RX desc=128 - RX free threshold=0
RXthreshold registers: pthresh=8 hthresh=8 wthresh=0
TXqueues=1 - TX desc=512 - TX free threshold=0
TXthreshold registers: pthresh=32 hthresh=0 wthresh=0
TXRS bit threshold=0 - TXQ flags=0x0
输入stop，停止包转发，这时会显示统计信息
testpmd> stop
Telling cores to stop...
Waiting for lcores to finish...
---------------------- Forward statistics for port 0 ----------------------
RX-packets: 5544832 RX-dropped: 0 RX-total: 5544832
TX-packets: 5544832 TX-dropped: 0 TX-total: 5544832
----------------------------------------------------------------------------
---------------------- Forward statistics for port 1 ----------------------
RX-packets: 5544832 RX-dropped: 0 RX-total: 5544832
TX-packets: 5544832 TX-dropped: 0 TX-total: 5544832
----------------------------------------------------------------------------
+++++++++++++++ Accumulated forward statistics for allports+++++++++++++++
RX-packets: 11089664 RX-dropped: 0 RX-total: 11089664
TX-packets: 11089664 TX-dropped: 0 TX-total: 11089664
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Done.
3.3 通过命令配置
最好切换到root权限。
1）编译dpdk
进入dpdk主目录
make install T=x86_64-native-linuxapp-gcc
进行编译
2）配置大页内存（非NUMA）
echo 128 >/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
mkdir /mnt/huge
mount -t hugetlbfs nodev /mnt/huge
可以用以下命令查看大页内存状态：
cat /proc/meminfo | grep Huge
3）安装igb_uio驱动
modprobe uio
insmod x86_64-native-linuxapp-gcc/kmod/igb_uio.ko
4）绑定网卡
先看一下当前网卡的状态
./tools/dpdk_nic_bind.py --status
Network devices using DPDK-compatibledriver
============================================
Network devices using kernel driver
===================================
0000:02:01.0 '82545EM Gigabit EthernetController (Copper)' if=eth0 drv=e1000 unused=igb_uio *Active*
Other network devices
=====================
0000:02:06.0 '82545EM Gigabit EthernetController (Copper)' unused=e1000,igb_uio
0000:02:07.0 '82545EM Gigabit Ethernet Controller(Copper)' unused=e1000,igb_uio
进行绑定：
./tools/dpdk_nic_bind.py -b igb_uio0000:02:06.0
./tools/dpdk_nic_bind.py -b igb_uio0000:02:07.0
如果网卡有接口名，如eth1, eth2, 也可以在-b igb_uio后面使用接口名，而不使用pci地址。
5）运行testpmd测试程序
./x86_64-native-linuxapp-gcc/app/testpmd -c0x3 -n 2 -- -i
6）编译运行其他示例程序
export RTE_SDK=
exportRTE_TARGET=x86_64-native-linuxapp-gcc
之后进入
4. CentOS 7.0上的配置
4.1 准备
安装CentOS虚拟机时，如果选择minimal安装，还需要安装其下的基本开发工具集(含gcc，python等）
另外，dpdk提供的dpdk_nic_bind.py脚本中会调用到lspci命令，这个默认没有安装，运行以下命令安装(不安装此工具则无法绑定网卡）：
yum install pciutils
ifconfig默认也没有安装，如果想用它，应运行：
yum install net-tools
在CentOS上，要绑定给dpdk使用的网卡在绑定前，可能是活动的(active)，应将其禁用，否则无法绑定。禁用的一种方式是运行：
ifconfig eno33554984 down
eno33554984是接口名，如同eth0一样。
在CentOS上使用setup.sh和通过命令编译和配置dpdk的过程与Ubuntu一样，这里就从略了。
5. CPU和网卡队列绑定
以l3fwd为例，启动命令如下：
./l3fwd -c fffffffffff -n 4 -- -p 0xf -P--config="(0,0,1)(0,1,2)(1,0,8)(1,1,9)(2,0,16)(2,1,17)(3,0,24)(3,1,25)"
参数说明：
-c 标识绑定的core
-n cpu中numa的数量
-p 绑定的网卡
-q 一个网卡上收包队列的数量
该硬件设备有四个CPU socket,使四个网口绑定到四个不同的CPU socket上，每个网口起两个队列，绑定两个CPU的核。注意：如果PCI插槽对应不同的socket，会导致测试性能降低。
也可以使用l3fwd进行一个网口的自发自收，命令：l3fwd -cff -n 4 -- -p0x1 -P --config=“(0,0,1),(0,1,2),(0,2,3),(0,3,4)”
文章来源
http://www.cnblogs.com/zzqcn/p/4024205.html