ある程度形できたので以下のレポジトリにて公開しました。
https://github.com/s-you/dpdk.cr

dpdk.cr

Crystal bindings to DPDK, development in progress.

Hello World (examples/hello.cr)

require "../src/dpdk"

class Hello < Dpdk
  def hello_thread
    printf("Hello from lcore: %d\n", rte_lcore_id)
  end

  def main(argc, argv)
    rte_eal_init(argc, argv)
    rte_eal_mp_remote_launch(hello_thread)
    rte_eal_mp_wait_lcore
  end
end

Hello.run

Requirements

Crystal (0.24.1)
Recent Clang (5.0) or GCC, make and coreutils
Working DPDK (18.02, 17.11(branch), 17.08(branch)), with RTE_SDK environment variable is set
(Works with or without shared library enabled)

Documentation

https://s-you.github.io/dpdk.cr/docs/index.html

Building

% make help

targets:
  all             Build all files (currently dpdk only) [default]
  clean           Clean up built directories and files
  clean_examples  Clean up examples
  docs            Generate standard library documentation
  dpdk            Build the library
  help            Show this help
  spec            Run all specs

optional variables:
  debug           Add symbolic debug info (not full)
  progress        Enable progress output [default]
  release         Compile in release mode [default]
  stats           Enable statistics output
  threads         Maximum number of threads to use
  verbose         Run specs in verbose mode

recipes:
  Build an example from examples/ directory and output in build/ directory
    % make hello
  Enable stats output of example
    % make l2fwd stats=1
  Build an example in non release mode
    % make hello release=
  Clean up built files then the library
    % make clean

Compiling an example

% make hello

Running an example

Output depends on number of CPU and NICs available on your machine.

 % sudo build/hello
EAL: Detected 10 lcore(s)
EAL: Probing VFIO support...
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:08.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:09.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:0a.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:10.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:11.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:12.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:13.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
Hello from lcore: 1
Hello from lcore: 3
Hello from lcore: 2
Hello from lcore: 4
Hello from lcore: 5
Hello from lcore: 6
Hello from lcore: 7
Hello from lcore: 8
Hello from lcore: 9
Hello from lcore: 0

Examples (Tested only on VirtualBox)

Performance

rxtx_callbacks sample on one end, as fast as C

pktgen on the other end, 14Mpps with 64 byte packets (Wirerate at 10G)

|

TODO

Supports all possible examples provided by DPDK

Limitations

All static inlines in the dpdk headers either need to write it in Crystal or extern from C.
Following funtions are compiled as C library currently -
- rte_pktmbuf_free
- rte_pktmbuf_alloc
- rte_pktmbuf_append
- rte_eth_rx_burst
- rte_eth_tx_burst
- rte_ring_dequeue_burst
- rte_ring_enqueue_burst
- rte_ring_sp_enqueue_bulk
- rte_ring_sc_dequeue_bulk
- rte_lpm_lookup
- rte_lcore_to_socket_id