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/* SPDX-License-Identifier: MIT */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <poll.h>
#include <sys/time.h>
#include <sys/wait.h>
#include "liburing.h"
static unsigned long runtime_ms = 10000;
static unsigned long gettimeofday_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
}
int main(void)
{
unsigned long tstop;
unsigned long nr_reqs = 0;
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct io_uring ring;
int pipe1[2];
int ret, i, qd = 32;
int table_size = 128;
if (pipe(pipe1) != 0) {
perror("pipe");
return 1;
}
ret = io_uring_queue_init(1024, &ring, IORING_SETUP_SINGLE_ISSUER |
IORING_SETUP_DEFER_TASKRUN);
if (ret) {
fprintf(stderr, "io_uring_queue_init failed: %d\n", ret);
return 1;
}
ret = io_uring_register_ring_fd(&ring);
if (ret < 0) {
fprintf(stderr, "io_uring_register_ring_fd failed\n");
return 1;
}
ret = io_uring_register_files_sparse(&ring, table_size);
if (ret < 0) {
fprintf(stderr, "io_uring_register_files_sparse failed\n");
return 1;
}
for (i = 0; i < table_size; i++) {
ret = io_uring_register_files_update(&ring, i, pipe1, 1);
if (ret < 0) {
fprintf(stderr, "io_uring_register_files_update failed\n");
return 1;
}
}
srand(time(NULL));
tstop = gettimeofday_ms() + runtime_ms;
do {
int off = rand();
for (i = 0; i < qd; i++) {
sqe = io_uring_get_sqe(&ring);
int roff = (off + i) % table_size;
io_uring_prep_files_update(sqe, pipe1, 1, roff);
}
ret = io_uring_submit(&ring);
if (ret != qd) {
fprintf(stderr, "child: sqe submit failed: %d\n", ret);
return 1;
}
for (i = 0; i < qd; i++) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "child: wait completion %d\n", ret);
break;
}
io_uring_cqe_seen(&ring, cqe);
nr_reqs++;
}
} while (gettimeofday_ms() < tstop);
fprintf(stderr, "max updates/s: %lu\n", nr_reqs * 1000UL / runtime_ms);
io_uring_queue_exit(&ring);
close(pipe1[0]);
close(pipe1[1]);
return 0;
}
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