1 /* SPDX-License-Identifier: MIT */
2 #include <errno.h>
3 #include <stdio.h>
4 #include <unistd.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <signal.h>
8 #include <poll.h>
9 #include <sys/time.h>
10 #include <sys/wait.h>
11
12 #include "liburing.h"
13
14 static char buf[4096];
15 static unsigned long runtime_ms = 10000;
16
gettimeofday_ms(void)17 static unsigned long gettimeofday_ms(void)
18 {
19 struct timeval tv;
20
21 gettimeofday(&tv, NULL);
22 return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
23 }
24
main(void)25 int main(void)
26 {
27 unsigned long tstop;
28 unsigned long nr_reqs = 0;
29 struct io_uring_cqe *cqe;
30 struct io_uring_sqe *sqe;
31 struct io_uring ring;
32 int pipe1[2];
33 int ret, i, qd = 32;
34
35 if (pipe(pipe1) != 0) {
36 perror("pipe");
37 return 1;
38 }
39
40 ret = io_uring_queue_init(1024, &ring, IORING_SETUP_SINGLE_ISSUER);
41 if (ret == -EINVAL) {
42 fprintf(stderr, "can't single\n");
43 ret = io_uring_queue_init(1024, &ring, 0);
44 }
45 if (ret) {
46 fprintf(stderr, "child: ring setup failed: %d\n", ret);
47 return 1;
48 }
49
50 ret = io_uring_register_files(&ring, pipe1, 2);
51 if (ret < 0) {
52 fprintf(stderr, "io_uring_register_files failed\n");
53 return 1;
54 }
55
56 ret = io_uring_register_ring_fd(&ring);
57 if (ret < 0) {
58 fprintf(stderr, "io_uring_register_ring_fd failed\n");
59 return 1;
60 }
61
62 tstop = gettimeofday_ms() + runtime_ms;
63 do {
64 for (i = 0; i < qd; i++) {
65 sqe = io_uring_get_sqe(&ring);
66 io_uring_prep_poll_add(sqe, 0, POLLIN);
67 sqe->flags |= IOSQE_FIXED_FILE;
68 sqe->user_data = 1;
69 }
70
71 ret = io_uring_submit(&ring);
72 if (ret != qd) {
73 fprintf(stderr, "child: sqe submit failed: %d\n", ret);
74 return 1;
75 }
76
77 ret = write(pipe1[1], buf, 1);
78 if (ret != 1) {
79 fprintf(stderr, "write failed %i\n", errno);
80 return 1;
81 }
82 ret = read(pipe1[0], buf, 1);
83 if (ret != 1) {
84 fprintf(stderr, "read failed %i\n", errno);
85 return 1;
86 }
87
88 for (i = 0; i < qd; i++) {
89 ret = io_uring_wait_cqe(&ring, &cqe);
90 if (ret < 0) {
91 fprintf(stderr, "child: wait completion %d\n", ret);
92 break;
93 }
94 io_uring_cqe_seen(&ring, cqe);
95 nr_reqs++;
96 }
97 } while (gettimeofday_ms() < tstop);
98
99 fprintf(stderr, "requests/s: %lu\n", nr_reqs * 1000UL / runtime_ms);
100 return 0;
101 }
102