io_uring bare minimum echo server

• uses an event loop created with io_uring
• uses liburing git HEAD
• Linux 5.5 or higHer needed. (For IORING_OP_ACCEPT)

Build

make

Why fork a new repo

Because the original repo tries to improve performance by not doing the right thing

Benchmarks

• VMWare Ubuntu Focal Fossa 20.04 (development branch)
• Linux carter-virtual-machine 5.5.0-999-generic #202002070204 SMP Fri Feb 7 02:09:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
• 4 virtual cores
• Macbook pro i7 2.5GHz/16GB
• Compiler: clang version 9.0.1-8build1
• ./io_uring_echo_server 12345 ( for io_uring version )
• ./epoll_echo_server 12345 ( for epoll version )

with rust_echo_bench: https://github.com/haraldh/rust_echo_bench
unit: request/sec

command: cargo run --release -- -c 50

USE_POLL	RECV_SEND	EV MODEL	operations	1st	2nd	3rd	mid	rate
1	0	io_uring	POLL-READ_F-WRITE_F	150637	149408	153421	150637	101.40%
1	1	io_uring	POLL-RECV-SEND	158517	163899	156310	158517	106.70%
0	0	io_uring	READ_F-WRITE_F	87740	83988	91266	87740	59.06%
0	1	io_uring	SEND-RECV	88967	85187	80674	85187	57.34%
N/A	0	epoll	POLL-READ-WRITE	152407	148379	150991	150991	101.64%
N/A	1	epoll	POLL-RECV-SEND	148557	148124	148606	148557	100.00%
IO_LINK	1	io_uring	POLL-RECV-SEND	105464	109249	106085	106085	71.41%
IO_LINK	0	io_uring	POLL-READ_F-WRITE_F	108518	108715	105832	108518	73.05%

command: cargo run --release -- -c 200

USE_POLL	RECV_SEND	EV MODEL	operations	1st	2nd	3rd	mid	rate
1	0	io_uring	POLL-READ_F-WRITE_F	146183	143251	146514	146183	98.75%
1	1	io_uring	POLL-RECV-SEND	150691	151855	147474	150691	101.79%
0	0	io_uring	READ_F-WRITE_F	78388	76215	77005	77005	52.02%
0	1	io_uring	SEND-RECV	76152	69351	76097	76097	51.40%
N/A	0	epoll	POLL-READ-WRITE	148472	145701	147827	147827	99.86%
N/A	1	epoll	POLL-RECV-SEND	155998	156516	155453	156516	100.00%

command: cargo run --release -- -c 1

USE_POLL	RECV_SEND	EV MODEL	operations	1st	2nd	3rd	mid	rate
1	0	io_uring	POLL-READ_F-WRITE_F	15623	17776	18675	17776	118.93%
1	1	io_uring	POLL-RECV-SEND	19056	14811	14145	14811	99.10%
0	0	io_uring	READ_F-WRITE_F	48117	37423	46210	46210	309.18%
0	1	io_uring	SEND-RECV	22971	21146	20152	21146	141.48%
N/A	0	epoll	POLL-READ-WRITE	16105	14227	15672	15672	104.86%
N/A	1	epoll	POLL-RECV-SEND	18596	14076	14946	14946	100.00%