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/* SPDX-License-Identifier: MIT */
/*
* Test that the sqthread goes to sleep around the specified time, and that
* the NEED_WAKEUP flag is then set.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include "liburing.h"
#include "helpers.h"
int main(int argc, char *argv[])
{
struct io_uring_params p = {};
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct timeval tv;
struct io_uring ring;
unsigned long elapsed;
bool seen_wakeup;
int ret;
if (argc > 1)
return T_EXIT_SKIP;
p.flags = IORING_SETUP_SQPOLL;
p.sq_thread_idle = 100;
ret = io_uring_queue_init_params(1, &ring, &p);
if (ret) {
if (geteuid()) {
printf("%s: skipped, not root\n", argv[0]);
return T_EXIT_SKIP;
}
fprintf(stderr, "queue_init=%d\n", ret);
return T_EXIT_FAIL;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_nop(sqe);
io_uring_submit(&ring);
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe: %d\n", ret);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&ring, cqe);
elapsed = 0;
seen_wakeup = false;
gettimeofday(&tv, NULL);
do {
usleep(100);
if (IO_URING_READ_ONCE(*ring.sq.kflags) & IORING_SQ_NEED_WAKEUP) {
seen_wakeup = true;
break;
}
elapsed = mtime_since_now(&tv);
} while (elapsed < 1000);
if (!seen_wakeup) {
fprintf(stderr, "SQPOLL didn't flag wakeup\n");
return T_EXIT_FAIL;
}
/* should be around 100 msec */
if (elapsed < 90 || elapsed > 110) {
fprintf(stderr, "SQPOLL wakeup timing off %lu\n", elapsed);
return T_EXIT_FAIL;
}
return T_EXIT_PASS;
}
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