作者:扎波特的网线钳 2021-06-02 10:00:30
云计算 有几个云上的小伙伴想测测VPC网络性能,于是写了一些dpdk代码在阿里云上做了一个实验,也适用于其它云。

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本文转载自微信公众号「zartbot」,作者扎波特的网线钳。转载本文请联系zartbot公众号。
有几个云上的小伙伴想测测VPC网络性能,于是写了一些dpdk代码在阿里云上做了一个实验,也适用于其它云
使用root登录,更新一下源
- #备份原有的配置文件
 - mkdir /etc/yum.repos.d/bak
 - mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak/
 - #使用阿里云的源覆盖
 - wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
 - yum install -y https://mirrors.aliyun.com/epel/epel-release-latest-8.noarch.rpm
 - sed -i 's|^#baseurl=https://download.fedoraproject.org/pub|baseurl=https://mirrors.aliyun.com|' /etc/yum.repos.d/epel*
 - sed -i 's|^metalink|#metalink|' /etc/yum.repos.d/epel*
 - sudo dnf config-manager --set-enabled PowerTools
 - yum makecache
 - yum update
 - yum groupinstall "Development tools"
 - yum install gcc-gfortran kernel-modules-extra tcl tk tcsh terminator tmux kernel-rpm-macros elfutils-libelf-devel libnl3-devel meson createrepo numactl-devel
 - pip3 install pyelftools
 
- sudo vi /etc/default/grub
 - //在 GRUB_CMDLINE_LINUX 行添加"intel_iommu=on iommu=pt"
 - //保存退出
 
然后更新grub并重启系统
- sudo grub2-mkconfig -o /boot/grub2/grub.cfg
 - sudo grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg
 - sudo reboot
 
CentOS上需要添加/usr/local路径, 主要是LD_LIBRARY_PATH PATH 和 PKG_CONFIG_PATH 以及sudo的path
- sudo vi /etc/ld.so.conf.d/dpdk.conf
 - >>添加如下path
 - /usr/local/lib64
 - >>退出
 - sudo ldconfig
 - vim ~/.bashrc
 - >>添加如下path
 - export PATH=/usr/local/bin:$PATH
 - export PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig:${PKG_CONFIG_PATH}
 - 保存后source
 - source ~/.bashrc
 - sudo vim /etc/sudoers
 - >>将secure_path添加/usr/local/bin
 - Defaults secure_path = /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin
 
然后解压dpdk,并编译安装
- wget http://fast.dpdk.org/rel/dpdk-21.05.tar.xz
 - tar xf dpdk-21.05.tar.xz
 - cd dpdk-21.05
 - meson build -D examples=all
 - cd build
 - ninja
 - sudo ninja install
 - sudo ldconfig
 
设置Hugepage和bind接口
- dpdk-hugepages.py --setup 4G
 - modprobe vfio-pci
 - dpdk-devbind.py -s
 - Network devices using kernel driver
 - ===================================
 - 0000:00:05.0 'Virtio network device 1000' if=eth0 drv=virtio-pci unused=vfio-pci *Active*
 - 0000:00:06.0 'Virtio network device 1000' if=eth1 drv=virtio-pci unused=vfio-pci *Active*
 
注意虚拟机环境需要noniommu_mode
- ifconfig eth1 down
 - echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
 - dpdk-devbind.py -b vfio-pci 0000:00:06.0
 
验证
- dpdk-devbind.py -s
 - Network devices using DPDK-compatible driver
 - ============================================
 - 0000:00:06.0 'Virtio network device 1000' drv=vfio-pci unused=
 - Network devices using kernel driver
 - ===================================
 - 0000:00:05.0 'Virtio network device 1000' if=eth0 drv=virtio-pci unused=vfio-pci *Active*
 
下载代码
- cd ~
 - wget https://github.com/zartbot/learn_dpdk/archive/refs/heads/main.zip
 - unzip main.zip
 - cd learn_dpdk-main/
 
编译
- cd 01_port_init/devinfo/
 - make clean;make
 
检查接口支持情况
- ./build/devinfo
 - EAL: Detected 24 lcore(s)
 - EAL: Detected 1 NUMA nodes
 - EAL: Detected shared linkage of DPDK
 - EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
 - EAL: Selected IOVA mode 'PA'
 - EAL: No available 1048576 kB hugepages reported
 - EAL: VFIO support initialized
 - EAL: Invalid NUMA socket, default to 0
 - EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:00:05.0 (socket 0)
 - eth_virtio_pci_init(): Failed to init PCI device
 - EAL: Requested device 0000:00:05.0 cannot be used
 - EAL: Invalid NUMA socket, default to 0
 - EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:00:06.0 (socket 0)
 - EAL: Using IOMMU type 8 (No-IOMMU)
 - TELEMETRY: No legacy callbacks, legacy socket not created
 - *****************************************
 - number of available port: 1
 - =========================================
 - port: 0 Driver:net_virtio
 - Link down
 - MAC address: 00:16:3E:25:3F:0A
 - PCIe:0000:00:06.0
 - Max RX Queue: 12 Desc: 65535
 - Max TX Queue: 12 Desc: 65535
 - Offload Capability:
 - DEV_RX_OFFLOAD_VLAN_STRIP
 - DEV_RX_OFFLOAD_UDP_CKSUM
 - DEV_RX_OFFLOAD_TCP_CKSUM
 - DEV_RX_OFFLOAD_TCP_LRO
 - DEV_RX_OFFLOAD_JUMBO_FRAME
 - -----------------------------------------
 - DEV_TX_OFFLOAD_VLAN_INSERT
 - DEV_TX_OFFLOAD_UDP_CKSUM
 - DEV_TX_OFFLOAD_TCP_CKSUM
 - DEV_TX_OFFLOAD_TCP_TSO
 - DEV_TX_OFFLOAD_MULTI_SEGS
 - =========================================
 
- cd ~/learn_dpdk-main/02_send_recv/traffic_gen/
 
修改send_pkt.c的源目的地址,注意目的MAC在阿里云上要为eeff.ffff.ffff
- //init mac
 - struct rte_ether_addr s_addr = {{0x00, 0x16, 0x3e, 0x25, 0x0b, 0xe3}};
 - struct rte_ether_addr d_addr = {{0xee, 0xff, 0xff, 0xff, 0xff, 0xff}};
 - //init IP header
 - rte_be32_t s_ip_addr = string_to_ip("10.66.1.220");
 - rte_be32_t d_ip_addr = string_to_ip("10.66.1.219");
 
由于接口支持有限,修改 common.h
- #define NUM_RX_QUEUE 1
 - #define NUM_TX_QUEUE 1
 - static const struct rte_eth_conf port_conf_default = {
 - .rxmode = {
 - .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
 - .mq_mode = ETH_MQ_RX_NONE,
 - },
 - .txmode = {
 - .mq_mode = ETH_MQ_TX_NONE,
 - }
 - };
 
修改portinit.c 关闭RX-CHECKSUM OFFLOAD, 注释掉下面这段:
- if (dev_info.rx_offload_capa & DEV_RX_OFFLOAD_CHECKSUM)
 - {
 - printf("port[%u] support RX cheksum offload.\n", port);
 - port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_CHECKSUM;
 - }
 
最后测速大概3.3Mpps左右,接近官方售卖时的4Mpps
- [root@iZuf64vmgrtj12kczyslhdZ traffic_gen]# ./build/run
 - EAL: Detected 24 lcore(s)
 - EAL: Detected 1 NUMA nodes
 - EAL: Detected shared linkage of DPDK
 - EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
 - EAL: Selected IOVA mode 'PA'
 - EAL: No available 1048576 kB hugepages reported
 - EAL: VFIO support initialized
 - EAL: Invalid NUMA socket, default to 0
 - EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:00:05.0 (socket 0)
 - eth_virtio_pci_init(): Failed to init PCI device
 - EAL: Requested device 0000:00:05.0 cannot be used
 - EAL: Invalid NUMA socket, default to 0
 - EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:00:06.0 (socket 0)
 - EAL: Using IOMMU type 8 (No-IOMMU)
 - TELEMETRY: No legacy callbacks, legacy socket not created
 - initializing port 0...
 - port[0] support TX UDP checksum offload.
 - port[0] support TX TCP checksum offload.
 - Port[0] MAC: 00:16:3e:25:0b:e3
 - Core 1 doing RX dequeue.
 - Core 2 doing packet enqueue.
 - RX-Queue[0] PPS: 3280464
 - RX-Queue[0] PPS: 3277792
 - RX-Queue[0] PPS: 3303116
 - RX-Queue[0] PPS: 3307443
 - RX-Queue[0] PPS: 3296451
 - RX-Queue[0] PPS: 3294396
 - RX-Queue[0] PPS: 3297737
 - RX-Queue[0] PPS: 3290069
 - RX-Queue[0] PPS: 3279720
 - RX-Queue[0] PPS: 3285987
 - RX-Queue[0] PPS: 3279424
 
然后把common.h 中收发都改为4个线程
- #define NUM_RX_QUEUE 1
 - #define NUM_TX_QUEUE 1
 
测试结果和官方售卖的4Mpps一致了。
- RX-Queue[0] PPS: 578918
 - RX-Queue[1] PPS: 866823
 - RX-Queue[2] PPS: 2288950
 - RX-Queue[3] PPS: 865335
 
CPU Info
- [root@iZuf64vmgrtj12kczyslhdZ traffic_gen]# cat /proc/cpuinfo | grep Xeon
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 - model name : Intel(R) Xeon(R) Platinum 8369B CPU @ 2.70GHz
 
                名称栏目:聊聊云网络性能测试
                
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