DPDK helloworld

环境搭建：

手头没有intel的板子，暂时只能用虚拟机代替；

虚拟机的CPU数量不能超过真实的机器，因此暂时无法模拟出NUMA的环境；

dpdk需要至少两块网卡，eth0和eth1用于dpdk使用，eth2用于跟主机通信；

 

打开虚拟机的配置文件， xxx.vmx，把所有网卡都设置成e1000

ethernet0.present = "TRUE"
ethernet0.connectionType = "hostonly"
ethernet0.wakeOnPcktRcv = "FALSE"
ethernet0.addressType = "static"
ethernet0.virtualDev = "e1000"
ethernet1.present = "TRUE"
ethernet1.connectionType = "hostonly"
ethernet1.wakeOnPcktRcv = "FALSE"
ethernet1.addressType = "static"
ethernet1.virtualDev = "e1000"
ethernet2.present = "TRUE"
ethernet2.connectionType = "nat"
ethernet2.wakeOnPcktRcv = "FALSE"
ethernet2.addressType = "static"
ethernet2.virtualDev = "e1000"

下载dpdk源码

git clone git://dpdk.org/dpdk

设置环境变量

export RTE_SDK=/root/dpdk
export RTE_TARGET=i686-default-linuxapp-gcc
export EXTRA_CFLAGS="-O0 -g"

由于是32位机器，设置target为i686；更多target可以参考intel-dpdk-getting-started-guide

其中EXTRA_CFLAGS把编译优化去掉，并加上调试信息；

 

编译代码

make config T=i686-default-linuxapp-gcc
make install T=i686-default-linuxapp-gcc
make -C i686-default-linuxapp-gcc
make -C examples/helloworld

预留hugepage个数，并挂载

echo 128 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

mount -t hugetlbfs nodev /mnt/huge

加载uio和igb_uio

modprobe uio
insmod ./build/kmod/igb_uio.ko

绑定设备

./tools/igb_uio_bind.py --bind=igb_uio eth0
./tools/igb_uio_bind.py --bind=igb_uio eth1

如果需要解绑定，后面的bus:slot.func各种设备不一样

./tools/igb_uio_bind.py --unbind 02:01.0
./tools/igb_uio_bind.py --unbind 02:02.0

./tools/igb_uio_bind.py --bind=e1000 02:01.0
./tools/igb_uio_bind.py --bind=e1000 02:02.0

最后就可以运行helloworld

root@bogon:~/dpdk# ./examples/helloworld/build/helloworld -c 0xf -n 2
EAL: Cannot read numa node link for lcore 0 - using physical package id instead
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Cannot read numa node link for lcore 1 - using physical package id instead
EAL: Detected lcore 1 as core 1 on socket 0
EAL: Cannot read numa node link for lcore 2 - using physical package id instead
EAL: Detected lcore 2 as core 0 on socket 1
EAL: Cannot read numa node link for lcore 3 - using physical package id instead
EAL: Detected lcore 3 as core 1 on socket 1
EAL: Skip lcore 4 (not detected)
EAL: Skip lcore 5 (not detected)
EAL: Skip lcore 6 (not detected)
EAL: Skip lcore 7 (not detected)
EAL: Skip lcore 8 (not detected)
EAL: Skip lcore 9 (not detected)
EAL: Skip lcore 10 (not detected)
EAL: Skip lcore 11 (not detected)
EAL: Skip lcore 12 (not detected)
EAL: Skip lcore 13 (not detected)
EAL: Skip lcore 14 (not detected)
EAL: Skip lcore 15 (not detected)
EAL: Skip lcore 16 (not detected)
EAL: Skip lcore 17 (not detected)
EAL: Skip lcore 18 (not detected)
EAL: Skip lcore 19 (not detected)
EAL: Skip lcore 20 (not detected)
EAL: Skip lcore 21 (not detected)
EAL: Skip lcore 22 (not detected)
EAL: Skip lcore 23 (not detected)
EAL: Skip lcore 24 (not detected)
EAL: Skip lcore 25 (not detected)
EAL: Skip lcore 26 (not detected)
EAL: Skip lcore 27 (not detected)
EAL: Skip lcore 28 (not detected)
EAL: Skip lcore 29 (not detected)
EAL: Skip lcore 30 (not detected)
EAL: Skip lcore 31 (not detected)
EAL: Skip lcore 32 (not detected)
EAL: Skip lcore 33 (not detected)
EAL: Skip lcore 34 (not detected)
EAL: Skip lcore 35 (not detected)
EAL: Skip lcore 36 (not detected)
EAL: Skip lcore 37 (not detected)
EAL: Skip lcore 38 (not detected)
EAL: Skip lcore 39 (not detected)
EAL: Skip lcore 40 (not detected)
EAL: Skip lcore 41 (not detected)
EAL: Skip lcore 42 (not detected)
EAL: Skip lcore 43 (not detected)
EAL: Skip lcore 44 (not detected)
EAL: Skip lcore 45 (not detected)
EAL: Skip lcore 46 (not detected)
EAL: Skip lcore 47 (not detected)
EAL: Skip lcore 48 (not detected)
EAL: Skip lcore 49 (not detected)
EAL: Skip lcore 50 (not detected)
EAL: Skip lcore 51 (not detected)
EAL: Skip lcore 52 (not detected)
EAL: Skip lcore 53 (not detected)
EAL: Skip lcore 54 (not detected)
EAL: Skip lcore 55 (not detected)
EAL: Skip lcore 56 (not detected)
EAL: Skip lcore 57 (not detected)
EAL: Skip lcore 58 (not detected)
EAL: Skip lcore 59 (not detected)
EAL: Skip lcore 60 (not detected)
EAL: Skip lcore 61 (not detected)
EAL: Skip lcore 62 (not detected)
EAL: Skip lcore 63 (not detected)
EAL: Setting up memory...
EAL: cannot open /proc/self/numa_maps, consider that all memory is in socket_id 0
EAL: Ask a virtual area of 0xe800000 bytes
EAL: Virtual area found at 0xa8400000 (size = 0xe800000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0xa8000000 (size = 0x200000)
EAL: Ask a virtual area of 0x400000 bytes
EAL: Virtual area found at 0xa7a00000 (size = 0x400000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0xa7600000 (size = 0x200000)
EAL: Ask a virtual area of 0xc00000 bytes
EAL: Virtual area found at 0xa6800000 (size = 0xc00000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0xa6400000 (size = 0x200000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0xa6000000 (size = 0x200000)
EAL: Requesting 128 pages of size 2MB from socket 0
EAL: TSC frequency is ~2660068 KHz
EAL: Master core 0 is ready (tid=b7599800)
EAL: Core 1 is ready (tid=a5fffb40)
EAL: Core 2 is ready (tid=a57feb40)
EAL: Core 3 is ready (tid=a4ffdb40)
hello from core 1
hello from core 3
hello from core 2
hello from core 0

后面就可以用gdb调试了