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