dpdk實驗環境部署
1、實驗環境說明
vmware workstatioin 12
centos 7.5.1804
dpdk-stable-18.11.1
2、實驗步驟
（1）虛擬機安裝
http://vault.centos.org/7.5.1804/isos/x86_64/從鏈接下載CentOS-7-x86_64-DVD-1804.iso，安裝時需要准備3張虛擬網卡，一個為上網用，另外兩個是僅主機模式用於dpdk使用。內存我選擇分配3G，cpu 2核。
（2）
依賴下載：
yum install -y numactl-devel*x86_64 make gcc libpcap libpcap-devel 下載內核頭文件： wget http://vault.centos.org/7.5.1804/os/x86_64/Packages/kernel-devel-3.10.0-862.el7.x86_64.rpm 安裝內核頭文件： rpm -ivh kernel-devel-3.10.0-862.el7.x86_64.rpm
內核頭文件鏈接到內核模塊中 ln -fs /usr/src/kernels/3.10.0-862.el7.x86_64/ /lib/modules/3.10.0-862.el7.x86_64/build/
（3）編譯
make config T=x86_64-native-linuxapp-gcc sed -ri 's,(PMD_PCAP=).*,\1y,' build/.config make
（4）設置大頁內存
echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages mkdir /mnt/huge mount -t hugetlbfs nodev /mnt/huge
（5）加載驅動
modprobe uio_pci_generic modprobe uio modprobe vfio-pci insmod build/kmod/igb_uio.ko
（6）查看網卡bind信息
usertools/dpdk-devbind.py --status
（7）綁定網卡
ifconfig ens34 down ifconfig ens35 down ./usertools/dpdk-devbind.py --bind=igb_uio 02:02.0 ./usertools/dpdk-devbind.py --bind=igb_uio 02:03.0
（8）查看綁定信息
ls /dev/uio* -l
（9）編譯examples
make -C examples RTE_SDK=$(pwd) RTE_TARGET=build O=$(pwd)/build/examples
（10）運行helloworld程序
./build/examples/helloworld/build/helloworld
bug修正，
進入dpdk-stable-18.11.1/
vim kernel/linux/igb_uio/igb_uio.c
將pci_intx_mask_supported(dev)代碼修改為如下的 pci_intx_mask_supported(dev)||true
修改后重新執行
make
modprobe uio_pci_generic modprobe uio modprobe vfio-pci
rmmod igb_uio.ko
insmod build/kmod/igb_uio.ko
usertools/dpdk-devbind.py --status
./usertools/dpdk-devbind.py --bind=igb_uio 02:02.0 ./usertools/dpdk-devbind.py --bind=igb_uio 02:03.0
./build/examples/helloworld/build/helloworld
（11）testpmd測試程序
./build/app/testpmd -l 0-1 -n 2 -- -i
運行結果
[root@localhost dpdk-stable-18.11.1]# ./build/app/testpmd -l 0-1 -n 2 -- -i
EAL: Detected 2 lcore(s)
EAL: Detected 1 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: No free hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: PCI device 0000:02:01.0 on NUMA socket -1
EAL: Invalid NUMA socket, default to 0
EAL: probe driver: 8086:100f net_e1000_em
EAL: PCI device 0000:02:02.0 on NUMA socket -1
EAL: Invalid NUMA socket, default to 0
EAL: probe driver: 8086:100f net_e1000_em
EAL: PCI device 0000:02:03.0 on NUMA socket -1
EAL: Invalid NUMA socket, default to 0
EAL: probe driver: 8086:100f net_e1000_em
Interactive-mode selected
testpmd: create a new mbuf pool <mbuf_pool_socket_0>: n=155456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Configuring Port 0 (socket 0)
Port 0: 00:0C:29:D3:37:3B
Configuring Port 1 (socket 0)
Port 1: 00:0C:29:D3:37:45
Checking link statuses...
Done
testpmd> start //start后，等個10s,再執行stop
io packet forwarding - ports=2 - cores=1 - streams=2 - NUMA support enabled, MP allocation mode: native
Logical Core 1 (socket 0) forwards packets on 2 streams:
RX P=0/Q=0 (socket 0) -> TX P=1/Q=0 (socket 0) peer=02:00:00:00:00:01
RX P=1/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
io packet forwarding packets/burst=32
nb forwarding cores=1 - nb forwarding ports=2
port 0: RX queue number: 1 Tx queue number: 1
Rx offloads=0x0 Tx offloads=0x0
RX queue: 0
RX desc=256 - RX free threshold=0
RX threshold registers: pthresh=0 hthresh=0 wthresh=0
RX Offloads=0x0
TX queue: 0
TX desc=256 - TX free threshold=0
TX threshold registers: pthresh=0 hthresh=0 wthresh=0
TX offloads=0x0 - TX RS bit threshold=0
port 1: RX queue number: 1 Tx queue number: 1
Rx offloads=0x0 Tx offloads=0x0
RX queue: 0
RX desc=256 - RX free threshold=0
RX threshold registers: pthresh=0 hthresh=0 wthresh=0
RX Offloads=0x0
TX queue: 0
TX desc=256 - TX free threshold=0
TX threshold registers: pthresh=0 hthresh=0 wthresh=0
TX offloads=0x0 - TX RS bit threshold=0
testpmd> stop
Telling cores to stop...
Waiting for lcores to finish...
---------------------- Forward statistics for port 0 ----------------------
RX-packets: 3087933 RX-dropped: 0 RX-total: 3087933
TX-packets: 3273024 TX-dropped: 0 TX-total: 3273024
----------------------------------------------------------------------------
---------------------- Forward statistics for port 1 ----------------------
RX-packets: 3273028 RX-dropped: 0 RX-total: 3273028
TX-packets: 3087929 TX-dropped: 0 TX-total: 3087929
----------------------------------------------------------------------------
+++++++++++++++ Accumulated forward statistics for all ports+++++++++++++++
RX-packets: 6360961 RX-dropped: 0 RX-total: 6360961
TX-packets: 6360953 TX-dropped: 0 TX-total: 6360953
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Done.
testpmd> quit
Stopping port 0...
Stopping ports...
Done
Stopping port 1...
Stopping ports...
Done
Shutting down port 0...
Closing ports...
Done
Shutting down port 1...
Closing ports...
Done
Bye...