DPDK是一个运行在用户态的程序。它通过卸载原来的linux对应网卡驱动，加载它本身由各个驱动组成的链接库，通过控制固定的核数，来专门进行轮询式网卡收发包的一款软件。
通过开源github库编译出来的dpdk工具箱会放在/build目录下，大概这样：
这里，需要根据不同的工具，进行一个罗列。
核心工具
1、dpdk-testpmd
这是DPDK最著名的交互式数据包处理测试应用，主要用于测试网卡的基本收发功能、性能基准测试、验证硬件卸载功能以及简单的流量转发。支持io、mac、mac_retry、flowgen等模式的转发。
2、dpdk-proc-info
显示DPDK进程的资源使用情况，用于查看内存池、环形队列、以太网统计信息、CPU核心映射等。
3、dpdk-pdump
用户态数据包捕获工具，抓取并保存为pcap格式的文件
testpmd命令
testpmd的help打印为：
root@localhost:/home/kaoqi/dpdk/dpdk/build/app# ./dpdk-testpmd --help
usage: ./dpdk-testpmd <DPDK EAL options> -- <App options>
options:
-h, --help show this help message and exit.
--auto-probing Let EAL probe all available devices unless some -a/-b option is set.
-a, --allow Add device to allow-list, causing DPDK to only use specified devices
--base-virtaddr Base virtual address to reserve memory
-b, --block Add device to block-list, preventing DPDK from using the device
-c, --coremask [Deprecated] Hexadecimal bitmask of cores to use
-d, --driver-path Path to external driver shared object, or directory of drivers
--force-max-simd-bitwidth Set max SIMD bitwidth to use in vector code paths
--huge-unlink Unlink hugetlbfs files on exit (existing|always|never)
--in-memory DPDK should not create shared mmap files in filesystem (disables secondary process support)
--iova-mode IOVA mapping mode, physical (pa)/virtual (va)
-l, --lcores List of CPU cores to use
--legacy-mem Enable legacy memory behavior
--log-color Enable/disable color in log output
--log-level Log level for loggers; use log-level=help for list of log types and levels
--log-timestamp Enable/disable timestamp in log output
--main-lcore Select which core to use for the main thread
--mbuf-pool-ops-name User defined mbuf default pool ops name
-n, --memory-channels Number of memory channels per socket
-r, --memory-ranks Force number of memory ranks (don't detect)
-m, --memory-size Total size of memory to allocate initially
-A, --no-auto-probing Do not probe any devices unless some -a option is set
--no-hpet Disable HPET timer
--no-huge Disable hugetlbfs support
--no-pci Disable all PCI devices
--no-shconf Disable shared config file generation
--no-telemetry Disable telemetry
--pagesz-mem Memory allocation per hugepage size (format: <pagesz>:<limit>, e.g. 2M:32G). Repeat option for multiple page sizes.
--proc-type Type of process (primary|secondary|auto)
-R, --remap-lcore-ids Remap lcore IDs to be contiguous starting from 0, or supplied value
-S, --service-corelist List of cores to use for service threads
-s, --service-coremask [Deprecated] Bitmask of cores to use for service threads
--single-file-segments Store all pages within single files (per-page-size, per-node)
--telemetry Enable telemetry
--vdev Add a virtual device to the system; format=<driver><id>[,key=val,...]
--vmware-tsc-map Use VMware TSC mapping instead of native RDTSC
-v, --version Show version
--syslog Log to syslog (and optionally set facility)
--trace Enable trace based on regular expression trace name
--trace-bufsz Trace buffer size
--trace-dir Trace directory
--trace-mode Trace mode
--create-uio-dev Create /dev/uioX devices
--file-prefix Base filename of hugetlbfs files
--huge-dir Directory for hugepage files
--huge-worker-stack Allocate worker thread stacks from hugepage memory, with optional size (kB)
--match-allocations Free hugepages exactly as allocated
--numa-mem Memory to allocate on NUMA nodes (comma separated values)
--numa-limit Limit memory allocation on NUMA nodes (comma separated values)
--socket-mem Alias for --numa-mem
--socket-limit Alias for --numa-limit
--vfio-intr VFIO interrupt mode (legacy|msi|msix)
--vfio-vf-token VF token (UUID) shared between SR-IOV PF and VFs
For more information on EAL options, see the DPDK documentation at:
https://doc.dpdk.org/guides/linux_gsg/这需要单独开一篇文章来细讲一下这里的参数含义。