使用OVS DPDK

淩亂°似流年 2021-10-24 04:24 345阅读 0赞

# ![Center][] #

# 硬件要求 #

网卡得支持DPDK，见：http://dpdk.org/doc/nics

CPU得支持DPDK, 测试命令：cat  /proc/cpuinfo |grep pdpe1gb

不一定非要支持DPDK硬件的网卡才能做实验，因为DPDK也支持virtio dpdk driver.

![Center 1][]

# 打开大页支持 #

hua@node1:~$ cat  /etc/default/grub |grep GRUB\_CMDLINE\_LINUX  
GRUB\_CMDLINE\_LINUX\_DEFAULT="quiet splash intel\_iommu=on pci=assign-busses"  
GRUB\_CMDLINE\_LINUX="transparent\_hugepage=never hugepagesz=2M hugepages=64 default\_hugepagesz=2M"  
  
vi /etc/fstab  
nodev /mnt/huge hugetlbfs pagesize=2MB 0 0  
  
sudo update-grub  
sudo mkdir -p /mnt/huge  
sudo reboot  
hua@node1:~$ cat /proc/meminfo |grep HugePages\_  
HugePages\_Total:       64  
HugePages\_Free:        64  
HugePages\_Rsvd:        0

HugePages\_Surp:        0

hua@node1:~$ grep Hugepagesize /proc/meminfo  
Hugepagesize:       2048 kB

# 配置网卡使用uio\_pci\_generic驱动,  \#注意：实验发现，对于sr-iov网卡，此处必须是PF，PF试验成功，VF试验不成功。所以虚机可以使用PF去做DPDK port，也可以直接直通方式使用VF。 #

至于PF的驱动，可以使用ixgbe，也可以使用DPDK PF driver；对于VF的驱动，可以使用ixgbefv，也可以使用DPDK VF driver. 如果要使用DPDK PF driver需在grub中加上iommu=pt.

![Center 2][]

它们之间也可以通信：

![Center 3][]

hua@node1:~$  sudo modprobe uio\_pci\_generic  
  
hua@node1:~$ sudo dpdk\_nic\_bind --status  
  
Network devices using DPDK-compatible driver  
============================================  
<none>  
  
Network devices using kernel driver  
===================================  
0000:00:19.0 'Ethernet Connection I217-V' if=eth0 drv=e1000e unused=uio\_pci\_generic \*Active\*  
0000:05:00.0 '82576 Gigabit Network Connection' if=eth1 drv=igb unused=uio\_pci\_generic \*Active\*  
0000:05:00.1 '82576 Gigabit Network Connection' if=eth2 drv=igb unused=uio\_pci\_generic \*Active\*  
  
Other network devices  
=====================  
0000:06:10.0 '82576 Virtual Function' unused=uio\_pci\_generic  
0000:06:10.1 '82576 Virtual Function' unused=uio\_pci\_generic  
0000:06:10.2 '82576 Virtual Function' unused=uio\_pci\_generic  
0000:06:10.3 '82576 Virtual Function' unused=uio\_pci\_generic  
  
hua@node1:~$ sudo dpdk\_nic\_bind -b uio\_pci\_generic 0000:05:00.0  
Routing table indicates that interface 0000:05:00.0 is active. Not modifying  
  
hua@node1:~$ sudo ifconfig eth1 down  
hua@node1:~$ sudo dpdk\_nic\_bind -b uio\_pci\_generic 0000:05:00.0  
  
hua@node1:~$ sudo dpdk\_nic\_bind --status  
Network devices using DPDK-compatible driver  
============================================  
0000:05:00.0 '82576 Gigabit Network Connection' drv=uio\_pci\_generic unused=  
  
Network devices using kernel driver  
===================================  
0000:00:19.0 'Ethernet Connection I217-V' if=eth0 drv=e1000e unused=uio\_pci\_generic \*Active\*  
0000:05:00.1 '82576 Gigabit Network Connection' if=eth2 drv=igb unused=uio\_pci\_generic \*Active\*  
  
Other network devices  
=====================  
0000:06:10.1 '82576 Virtual Function' unused=uio\_pci\_generic  
0000:06:10.3 '82576 Virtual Function' unused=uio\_pci\_generic

# 配置OVS使用DPDK #

hua@node1:~$ cat /etc/default/openvswitch-switch |grep DPDK  
DPDK\_OPTS='--dpdk -c 0x1 -n 2'  
  
hua@node1:~$ sudo update-alternatives --set ovs-vswitchd /usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk  
update-alternatives: using /usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk to provide /usr/sbin/ovs-vswitchd (ovs-vswitchd) in manual mode

hua@node1:~$ sudo stop openvswitch-switch; sudo start openvswitch-switch

hua@node1:~$ cat /var/log/openvswitch/ovs-ctl.log |grep dpdk

有一个bug设置了DPDK\_OPTS不生效，见：https://bugs.launchpad.net/ubuntu/+source/openvswitch-dpdk/+bug/1547463， 做了这些改动：

vi /etc/default/openvswitch-switch  
DPDK\_OPTS='--dpdk -c 0x1 -n 4'  
  
vi /etc/init/openvswitch-switch.conf  
  \# To enable openvswitch-dpdk  
  if test X"$DPDK\_OPTS" != X; then  
    set "$@" DPDK\_OPTS="$DPDK\_OPTS"  
  fi  
  
vi /usr/share/openvswitch/scripts/ovs-ctl  
            set ovs-vswitchd  
                if test X"$DPDK\_OPTS" != X; then  
                        set "$@" $DPDK\_OPTS --  
                fi  
                set "$@" unix:"$DB\_SOCK"

但在/var/log/openvswitch/ovs-ctl.log中仍然发现了下列错误，估计是ovs-vswitchd (Open vSwitch) 2.4.0版本（dpkg -l openvswitch-switch-dpdk）不支持--dpdk-opts参数吧。

/usr/share/openvswitch/scripts/ovs-ctl: unknown option "--dpdk-opts=-c 0x1 -n 4" (use --help for help)

为避免上述ovs的bug，我们改用下列三个命令启动：

sudo restart openvswitch-switch

sudo killall ovs-vswitchd

sudo ovs-vswitchd --dpdk -c 0x1 -n 2 -- unix:/var/run/openvswitch/db.sock --pidfile --detach

sudo ovs-vswitchd --dpdk -c 0x1 -n 2 --socket-mem 128,0 -- unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach --monitor

但仍然有下列错误。估计是保留的大页数目太少所致，后来将GRUB\_CMDLINE\_LINUX="transparent\_hugepage=never hugepagesz=2M hugepages=64 default\_hugepagesz=2M"中的hugepages从4改成64这个错误就翻过去了。

hua@node1:~$ sudo ovs-vswitchd --dpdk -c 0x1 -n 2 -- unix:/var/run/openvswitch/db.sock --pidfile --detach  
2016-04-07T11:48:03Z|00001|dpdk|INFO|No -cuse\_dev\_name provided - defaulting to vhost-net  
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 2 on socket 0  
EAL: Detected lcore 3 as core 3 on socket 0  
EAL: Support maximum 128 logical core(s) by configuration.  
EAL: Detected 4 lcore(s)  
EAL: No free hugepages reported in hugepages-1048576kB  
EAL: Setting up memory...  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f8609a00000 (size = 0x200000)  
EAL: Ask a virtual area of 0x400000 bytes  
EAL: Virtual area found at 0x7f8609400000 (size = 0x400000)  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f8609000000 (size = 0x200000)  
EAL: Requesting 4 pages of size 2MB from socket 0  
EAL: rte\_eal\_common\_log\_init(): cannot create log\_history mempool  
PANIC in rte\_eal\_init():  
Cannot init logs  
7: \[ovs-vswitchd() \[0x40b053\]\]  
6: \[/lib/x86\_64-linux-gnu/libc.so.6(\_\_libc\_start\_main+0xf5) \[0x7f860acc9ec5\]\]  
5: \[ovs-vswitchd() \[0x40a059\]\]  
4: \[ovs-vswitchd() \[0x639db1\]\]  
3: \[ovs-vswitchd() \[0x43f7ad\]\]  
2: \[ovs-vswitchd() \[0x407bad\]\]  
1: \[ovs-vswitchd() \[0x444e58\]\]

hua@node1:~$ sudo ovs-vswitchd --dpdk -c 0x1 -n 2 -- unix:/var/run/openvswitch/db.sock --pidfile --detach  
2016-04-07T13:57:08Z|00001|dpdk|INFO|No -cuse\_dev\_name provided - defaulting to vhost-net  
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 2 on socket 0  
EAL: Detected lcore 3 as core 3 on socket 0  
EAL: Support maximum 128 logical core(s) by configuration.  
EAL: Detected 4 lcore(s)  
EAL: No free hugepages reported in hugepages-1048576kB  
EAL: VFIO modules not all loaded, skip VFIO support...  
EAL: Setting up memory...  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f2f72a00000 (size = 0x200000)  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f2f72600000 (size = 0x200000)  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f2f72200000 (size = 0x200000)  
EAL: Ask a virtual area of 0x1a00000 bytes  
EAL: Virtual area found at 0x7f2f70600000 (size = 0x1a00000)  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f2f70200000 (size = 0x200000)  
EAL: Ask a virtual area of 0x5c00000 bytes  
EAL: Virtual area found at 0x7f2f6a400000 (size = 0x5c00000)  
EAL: Ask a virtual area of 0x200000 bytes  
EAL: Virtual area found at 0x7f2f6a000000 (size = 0x200000)  
EAL: Requesting 64 pages of size 2MB from socket 0  
EAL: TSC frequency is ~3292375 KHz  
EAL: Master lcore 0 is ready (tid=74e2bb40;cpuset=\[0\])  
PMD: ENICPMD trace: rte\_enic\_pmd\_init  
EAL: PCI device 0000:05:00.0 on NUMA socket -1  
EAL:   probe driver: 8086:10c9 rte\_igb\_pmd  
EAL:   PCI memory mapped at 0x7f2f72c00000  
EAL:   PCI memory mapped at 0x7f2f72c20000  
EAL:   PCI memory mapped at 0x7f2f72c60000  
PMD: eth\_igb\_dev\_init(): port\_id 0 vendorID=0x8086 deviceID=0x10c9  
EAL: PCI device 0000:05:00.1 on NUMA socket -1  
EAL:   probe driver: 8086:10c9 rte\_igb\_pmd  
EAL:   Not managed by a supported kernel driver, skipped  
EAL: PCI device 0000:06:10.1 on NUMA socket -1  
EAL:   probe driver: 8086:10ca rte\_igbvf\_pmd  
EAL:   Not managed by a supported kernel driver, skipped  
EAL: PCI device 0000:06:10.3 on NUMA socket -1  
EAL:   probe driver: 8086:10ca rte\_igbvf\_pmd  
EAL:   Not managed by a supported kernel driver, skipped  
Zone 0: name:<MALLOC\_S0\_HEAP\_0>, phys:0xd6c00000, len:0xb00000, virt:0x7f2f70600000, socket\_id:0, flags:0  
Zone 1: name:<RG\_MP\_log\_history>, phys:0x2200000, len:0x2080, virt:0x7f2f72a00000, socket\_id:0, flags:0  
Zone 2: name:<MP\_log\_history>, phys:0xd7700000, len:0x28a0c0, virt:0x7f2f71100000, socket\_id:0, flags:0  
Zone 3: name:<rte\_eth\_dev\_data>, phys:0x2202080, len:0x1f400, virt:0x7f2f72a02080, socket\_id:0, flags:0  
2016-04-07T13:57:09Z|00002|ovs\_numa|INFO|Discovered 4 CPU cores on NUMA node 0  
2016-04-07T13:57:09Z|00003|ovs\_numa|INFO|Discovered 1 NUMA nodes and 4 CPU cores  
2016-04-07T13:57:09Z|00004|reconnect|INFO|unix:/var/run/openvswitch/db.sock: connecting...  
VHOST\_CONFIG: socket created, fd:17  
VHOST\_CONFIG: bind to vhost-net  
2016-04-07T13:57:09Z|00005|reconnect|INFO|unix:/var/run/openvswitch/db.sock: connected  
2016-04-07T13:57:09Z|00006|ofproto\_dpif|INFO|system@ovs-system: Datapath supports recirculation  
2016-04-07T13:57:09Z|00007|ofproto\_dpif|INFO|system@ovs-system: MPLS label stack length probed as 1  
2016-04-07T13:57:09Z|00008|ofproto\_dpif|INFO|system@ovs-system: Datapath supports unique flow ids  
2016-04-07T13:57:09Z|00009|bridge|INFO|bridge br-ex: added interface br-ex on port 65534  
2016-04-07T13:57:09Z|00010|bridge|INFO|bridge br-ex: added interface qg-5786befb-c3 on port 1  
2016-04-07T13:57:09Z|00011|bridge|INFO|bridge br-tun: added interface patch-int on port 1  
2016-04-07T13:57:09Z|00012|bridge|INFO|bridge br-tun: added interface br-tun on port 65534  
2016-04-07T13:57:09Z|00013|bridge|INFO|bridge br-int: added interface tap140d04f3-58 on port 22  
2016-04-07T13:57:09Z|00014|bridge|INFO|bridge br-int: added interface tap6a12dfe3-40 on port 20  
2016-04-07T13:57:09Z|00015|bridge|INFO|bridge br-int: added interface tap1ea7e391-73 on port 21  
2016-04-07T13:57:09Z|00016|bridge|INFO|bridge br-int: added interface tapdc1b7683-4e on port 14  
2016-04-07T13:57:09Z|00017|bridge|INFO|bridge br-int: added interface patch-tun on port 182  
2016-04-07T13:57:09Z|00018|bridge|INFO|bridge br-int: added interface tap23e3a388-68 on port 11  
2016-04-07T13:57:09Z|00019|bridge|INFO|bridge br-int: added interface int-br-phy on port 1  
2016-04-07T13:57:09Z|00020|bridge|INFO|bridge br-int: added interface tap935ec68a-1a on port 12  
2016-04-07T13:57:09Z|00021|bridge|INFO|bridge br-int: added interface tap2ca9e4a0-67 on port 7  
2016-04-07T13:57:09Z|00022|bridge|INFO|bridge br-int: added interface tapcc6c6a9e-f2 on port 13  
2016-04-07T13:57:09Z|00023|bridge|INFO|bridge br-int: added interface tap4751f42a-65 on port 10  
2016-04-07T13:57:09Z|00024|bridge|INFO|bridge br-int: added interface br-int on port 65534  
2016-04-07T13:57:09Z|00025|bridge|INFO|bridge br-int: added interface tapdde9820f-58 on port 9  
2016-04-07T13:57:09Z|00026|bridge|WARN|could not open network device br100 (No such device)  
2016-04-07T13:57:09Z|00027|bridge|INFO|bridge br-phy: added interface phy-br-phy on port 3  
2016-04-07T13:57:09Z|00028|bridge|INFO|bridge br-phy: added interface br-phy on port 65534  
2016-04-07T13:57:09Z|00029|bridge|INFO|bridge br-ex: using datapath ID 0000de7e48588f4c  
2016-04-07T13:57:09Z|00030|connmgr|INFO|br-ex: added service controller "punix:/var/run/openvswitch/br-ex.mgmt"  
2016-04-07T13:57:09Z|00031|bridge|INFO|bridge br-tun: using datapath ID 00007a84c20ae149  
2016-04-07T13:57:09Z|00032|connmgr|INFO|br-tun: added service controller "punix:/var/run/openvswitch/br-tun.mgmt"  
2016-04-07T13:57:09Z|00033|bridge|INFO|bridge br-int: using datapath ID 00008e56b225c748  
2016-04-07T13:57:09Z|00034|connmgr|INFO|br-int: added service controller "punix:/var/run/openvswitch/br-int.mgmt"  
2016-04-07T13:57:09Z|00035|bridge|INFO|bridge br-phy: using datapath ID 00000255fc61864b  
2016-04-07T13:57:09Z|00036|connmgr|INFO|br-phy: added service controller "punix:/var/run/openvswitch/br-phy.mgmt"  
2016-04-07T13:57:09Z|00001|ofproto\_dpif\_upcall(handler15)|INFO|received packet on unassociated datapath port 0

# 测试 #

sudo ovs-vsctl ovsbr0 br-int  
sudo ovs-vsctl set bridge ovsbr0 datapath\_type=netdev

sudo ovs-vsctl add-port ovsbr0 dpdk0 -- set Interface dpdk0 type=dpdk  \#Port name shoud begin with dpdk

给虚机创建普通ovs port:

sudo ovs-vsctl add-port ovsbr0 intP1 -- set Interface intP1 type=internal  
sudo ip addr add 192.168.10.129/24 dev intP1  
sudo ip link set dev intP1 up  
sudo tcpdump -i intP1

或给虚机创建vhost-user port:

sudo ovs-vsctl add-port ovsbr0 vhost-user2 -- set Interface vhost-user2 type=dpdkvhostuser

虚机使用vhost-user port

sudo qemu-system-x86\_64 -enable-kvm -m 128 -smp 2 \\  
    -chardev socket,id=char0,path=/var/run/openvswitch/vhost-user1 \\  
    -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \\  
    -device virtio-net-pci,netdev=mynet1,mac=52:54:00:02:d9:01 \\  
    -object memory-backend-file,id=mem,size=128M,mem-path=/mnt/huge,share=on \\  
    -numa node,memdev=mem -mem-prealloc \\  
    -net user,hostfwd=tcp::10021-:22 -net nic \\  
    /bak/images/openstack\_demo.img

Inside VM: sudo ifconfig eth0 192.168.9.108/24

使用vhost-user方式可如下图所示：

![Center 4][]

dpdk-virtio-net

![Center 5][]

与Neutron的集成

nova已经支持vhost-user与hugepages特性，显然在nova.conf应该打开。

\[DEFAULT\]   
ovs\_use\_usvhost = True  
\[libvirt\]  
use\_hugepages = True

另外，应该手工创建上述的ovsbr0，然后在/etc/neutron/plugins/ml2/ml2\_conf.ini指定使用ovsbr0作为provider network.

\[ovs\]  
bridge\_mappings = default:ovsbr0

dpdk与neutron集成的工程叫networking-ovs-dpdk，在devstack加下列一行可使用devstack创建ovs dpdk环境。

enable\_plugin networking-ovs-dpdk https://github.com/openstack/networking-ovs-dpdk master

整个运行命令

sudo add-apt-repository cloud-archive:mitaka

sudo apt-get install openvswitch-switch-dpdk

sudo modprobe vfio-pci  
sudo chmod a+x /dev/vfio  
sudo chmod 0666 /dev/vfio/\*  
sudo ifconfig eth1 down  
sudo dpdk\_nic\_bind -b vfio-pci eth1  \#注意：实验发现，对于sr-iov网卡，此处必须是PF，PF试验成功，VF试验不成功。  
  
  
find /sys/kernel/iommu\_groups/ -type l  
sudo sysctl -w vm.nr\_hugepages=256  
cat /proc/meminfo |grep HugePages\_  
  
  
sudo restart openvswitch-switch  
sudo update-alternatives --set ovs-vswitchd /usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk  
sudo killall ovs-vswitchd  
sudo ovs-vswitchd --dpdk -c 0x1 -n 2 --socket-mem 128,0 -- unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfile:info --mlockall --no-chdir --log-file=/var/log/openvswitch/ovs-vswitchd.log --pidfile=/var/run/openvswitch/ovs-vswitchd.pid --detach --monitor  
ps -ef|grep dpdk  
  
  
sudo qemu-system-x86\_64 -enable-kvm -m 128 -smp 2 \\  
    -chardev socket,id=char0,path=/var/run/openvswitch/vhost-user1 \\  
    -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \\  
    -device virtio-net-pci,netdev=mynet1,mac=52:54:00:02:d9:01 \\  
    -object memory-backend-file,id=mem,size=128M,mem-path=/mnt/huge,share=on \\  
    -numa node,memdev=mem -mem-prealloc \\  
    -net user,hostfwd=tcp::10021-:22 -net nic \\  
    /bak/images/openstack\_demo.img  
  
  
Inside VM: sudo ifconfig eth0 192.168.9.108/24

# 附录1,编译DPDK源码并运行单个应用 #

git clone git://dpdk.org/dpdk  
  
export DPDK\_DIR=/bak/linux/dpdk  
export DPDK\_BUILD=$DPDK\_DIR/x86\_64-ivshmem-linuxapp-gcc/  
export RTE\_TARGET=x86\_64-ivshmem-linuxapp-gcc  
export EXTRA\_CFLAGS="-ggdb -ffunction-sections -O0"                                       \#设置调试选项  
  
echo 'CONFIG\_RTE\_BUILD\_COMBINE\_LIBS=y' >> ./config/common\_linuxapp   \#编译成单个文件

echo 'CONFIG\_RTE\_LIBRTE\_VHOST=y' >> ./config/common\_linuxapp

sudo make config T=x86\_64-ivshmem-linuxapp-gcc

sudo make install T=x86\_64-ivshmem-linuxapp-gcc                                                \#使用共享内存ivshmem模式

cd x86\_64-ivshmem-linuxapp-gcc/  
EXTRA\_CFLAGS="-g -O0" make -j4

sudo modprobe uio  
sudo insmod x86\_64-ivshmem-linuxapp-gcc/kmod/igb\_uio.ko                                \#DPDK只能使用igb\_uio和vfio-pci两种驱动

cd lib/librte\_vhost/eventfd\_link/  
make  
sudo insmod eventfd\_link.ko

sudo python tools/dpdk\_nic\_bind.py --status  
sudo python tools/dpdk\_nic\_bind.py -b igb\_uio 0000:05:00.0  
\#sudo python tools/dpdk\_nic\_bind.py -b uio\_pci\_generic 0000:05:00.0  
  
  
cd examples/helloworld/  
make  
sudo ./build/helloworld -c 0xf -n 4 --socket-mem=32

gdb ./build/helloworld  
(gdb) run -c 0xf -n 4 --socket-mem=32

\#integrate ovs with dpdk

git clone https://github.com/openvswitch/ovs.git  
cd /bak/linux/ovs  
export OVS\_DIR=\`pwd\`  
./boot.sh  
./configure --with-dpdk="$DPDK\_DIR/x86\_64-ivshmem-linuxapp-gcc/" --enable-ssl CFLAGS="-g -O0"  
make 'CFLAGS=-g -O0 -march=native' -j4

# 参考 #

\[1\] https://software.intel.com/en-us/blogs/2015/06/09/building-vhost-user-for-ovs-today-using-dpdk-200

\[2\] http://dpdk.readthedocs.org/en/v2.2.0/linux\_gsg/index.html

\[3\] http://blog.csdn.net/xy010902100449/article/details/47282937

\[4\] http://openvswitch.org/support/dist-docs/INSTALL.DPDK.md.txt

\[5\] https://software.intel.com/en-us/articles/using-open-vswitch-with-dpdk-for-inter-vm-nfv-applications

\[6\] https://raw.githubusercontent.com/xsited/ssg/master/scripts/build\_ovs\_dpdk.sh

\[7\] http://www.ran-lifshitz.com/2015/06/17/open-vswitch-netdev-dpdk-with-vhost-user-support/

\[8\] DPDK编程指南

转载于:https://www.cnblogs.com/liuhongru/p/11127788.html

[Center]: /images/20211023/4c73c098eb4a4fc4afac92289531fc1f.png
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