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/* SPDX-License-Identifier: MIT */
/*
* Description: test massive amounts of poll with cancel
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <sys/signal.h>
#include "liburing.h"
#define POLL_COUNT 30000
static void *sqe_index[POLL_COUNT];
static int reap_events(struct io_uring *ring, unsigned nr_events, int nowait)
{
struct io_uring_cqe *cqe;
int i, ret = 0;
for (i = 0; i < nr_events; i++) {
if (!i && !nowait)
ret = io_uring_wait_cqe(ring, &cqe);
else
ret = io_uring_peek_cqe(ring, &cqe);
if (ret) {
if (ret != -EAGAIN)
fprintf(stderr, "cqe peek failed: %d\n", ret);
break;
}
io_uring_cqe_seen(ring, cqe);
}
return i ? i : ret;
}
static int del_polls(struct io_uring *ring, int fd, int nr)
{
int batch, i, ret;
struct io_uring_sqe *sqe;
while (nr) {
batch = 1024;
if (batch > nr)
batch = nr;
for (i = 0; i < batch; i++) {
void *data;
sqe = io_uring_get_sqe(ring);
data = sqe_index[lrand48() % nr];
io_uring_prep_poll_remove(sqe, data);
}
ret = io_uring_submit(ring);
if (ret != batch) {
fprintf(stderr, "%s: failed submit, %d\n", __FUNCTION__, ret);
return 1;
}
nr -= batch;
ret = reap_events(ring, 2 * batch, 0);
}
return 0;
}
static int add_polls(struct io_uring *ring, int fd, int nr)
{
int pending, batch, i, count, ret;
struct io_uring_sqe *sqe;
pending = count = 0;
while (nr) {
batch = 1024;
if (batch > nr)
batch = nr;
for (i = 0; i < batch; i++) {
sqe = io_uring_get_sqe(ring);
io_uring_prep_poll_add(sqe, fd, POLLIN);
sqe_index[count++] = sqe;
sqe->user_data = (unsigned long) sqe;
}
ret = io_uring_submit(ring);
if (ret != batch) {
fprintf(stderr, "%s: failed submit, %d\n", __FUNCTION__, ret);
return 1;
}
nr -= batch;
pending += batch;
reap_events(ring, batch, 1);
}
return 0;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
struct io_uring_params p = { };
int pipe1[2];
int ret;
if (argc > 1)
return 0;
if (pipe(pipe1) != 0) {
perror("pipe");
return 1;
}
p.flags = IORING_SETUP_CQSIZE;
p.cq_entries = 16384;
ret = io_uring_queue_init_params(1024, &ring, &p);
if (ret) {
if (ret == -EINVAL) {
fprintf(stdout, "No CQSIZE, trying without\n");
ret = io_uring_queue_init(1024, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return 1;
}
}
}
add_polls(&ring, pipe1[0], 30000);
#if 0
usleep(1000);
#endif
del_polls(&ring, pipe1[0], 30000);
io_uring_queue_exit(&ring);
return 0;
}
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