introduce io_uring,using liburing,tested on kernel 6.1

[firear]

No description provided.

[ithewei]

非常感谢你的贡献！
我需要点时间认真review和测试下。
另外你做过分别使用epoll和iouring的性能对比数据吗？

[firear]

用pingpong echo简单测试结果如下:
epollserver epollclient:
Running 10s test @ 127.0.0.1:2000
2 threads and 100 connections, send 1024 bytes each time
total readcount=1906725 readbytes=1952486400
throughput = 186 MB/s

epollserver uringclient:
2 threads and 100 connections, send 1024 bytes each time
total readcount=1866482 readbytes=1911277568
throughput = 182 MB/s

uringserver epollclient:
Running 10s test @ 127.0.0.1:2000
2 threads and 100 connections, send 1024 bytes each time
total readcount=1976892 readbytes=2024337408
throughput = 193 MB/s

uringserver uringclient:
2 threads and 100 connections, send 1024 bytes each time
total readcount=1927291 readbytes=1973545984
throughput = 188 MB/s