108 lines
1.7 KiB
C
108 lines
1.7 KiB
C
/* SPDX-License-Identifier: MIT */
|
|
/*
|
|
* Description: exercise full filling of SQ and CQ ring
|
|
*
|
|
*/
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "liburing.h"
|
|
|
|
#define MAX_ENTRIES 32768
|
|
|
|
static int fill_nops(struct io_uring *ring)
|
|
{
|
|
struct io_uring_sqe *sqe;
|
|
int filled = 0;
|
|
|
|
do {
|
|
sqe = io_uring_get_sqe(ring);
|
|
if (!sqe)
|
|
break;
|
|
|
|
io_uring_prep_nop(sqe);
|
|
filled++;
|
|
} while (1);
|
|
|
|
return filled;
|
|
}
|
|
|
|
static int test_nops(struct io_uring *ring)
|
|
{
|
|
struct io_uring_cqe *cqe;
|
|
int ret, nr, total = 0, i;
|
|
|
|
nr = fill_nops(ring);
|
|
if (nr < 0) {
|
|
fprintf(stderr, "Fill: %d\n", nr);
|
|
goto err;
|
|
}
|
|
|
|
ret = io_uring_submit(ring);
|
|
if (ret != nr) {
|
|
fprintf(stderr, "submit %d, wanted %d\n", ret, nr);
|
|
goto err;
|
|
}
|
|
total += ret;
|
|
|
|
nr = fill_nops(ring);
|
|
if (nr < 0) {
|
|
fprintf(stderr, "Fill: %d\n", nr);
|
|
goto err;
|
|
}
|
|
|
|
ret = io_uring_submit(ring);
|
|
if (ret != nr) {
|
|
fprintf(stderr, "submit %d, wanted %d\n", ret, nr);
|
|
goto err;
|
|
}
|
|
total += ret;
|
|
|
|
for (i = 0; i < total; i++) {
|
|
ret = io_uring_wait_cqe(ring, &cqe);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "wait completion %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
io_uring_cqe_seen(ring, cqe);
|
|
}
|
|
return 0;
|
|
err:
|
|
return 1;
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct io_uring ring;
|
|
int ret, depth;
|
|
|
|
if (argc > 1)
|
|
return 0;
|
|
|
|
depth = 1;
|
|
while (depth <= MAX_ENTRIES) {
|
|
ret = io_uring_queue_init(depth, &ring, 0);
|
|
if (ret) {
|
|
if (ret == -ENOMEM)
|
|
break;
|
|
fprintf(stderr, "ring setup failed: %d\n", ret);
|
|
return 1;
|
|
}
|
|
|
|
ret = test_nops(&ring);
|
|
if (ret) {
|
|
fprintf(stderr, "test_single_nop failed\n");
|
|
return ret;
|
|
}
|
|
depth <<= 1;
|
|
io_uring_queue_exit(&ring);
|
|
}
|
|
|
|
return 0;
|
|
}
|