Jens Axboe | cad057f | 2020-09-05 11:58:08 -0600 | [diff] [blame] | 1 | /* SPDX-License-Identifier: MIT */ |
| 2 | /* |
| 3 | * Description: test SQPOLL with IORING_SETUP_ATTACH_WQ |
| 4 | */ |
| 5 | #include <errno.h> |
| 6 | #include <stdio.h> |
| 7 | #include <unistd.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <string.h> |
| 10 | #include <fcntl.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <sys/poll.h> |
| 13 | #include <sys/eventfd.h> |
| 14 | #include <sys/resource.h> |
| 15 | #include "liburing.h" |
| 16 | |
| 17 | #define FILE_SIZE (128 * 1024 * 1024) |
| 18 | #define BS 4096 |
| 19 | #define BUFFERS 64 |
| 20 | |
| 21 | #define NR_RINGS 4 |
| 22 | |
| 23 | static struct iovec *vecs; |
| 24 | |
| 25 | static int create_buffers(void) |
| 26 | { |
| 27 | int i; |
| 28 | |
| 29 | vecs = malloc(BUFFERS * sizeof(struct iovec)); |
| 30 | for (i = 0; i < BUFFERS; i++) { |
| 31 | if (posix_memalign(&vecs[i].iov_base, BS, BS)) |
| 32 | return 1; |
| 33 | vecs[i].iov_len = BS; |
| 34 | } |
| 35 | |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | static int create_file(const char *file) |
| 40 | { |
| 41 | ssize_t ret; |
| 42 | char *buf; |
| 43 | int fd; |
| 44 | |
| 45 | buf = malloc(FILE_SIZE); |
| 46 | memset(buf, 0xaa, FILE_SIZE); |
| 47 | |
| 48 | fd = open(file, O_WRONLY | O_CREAT, 0644); |
| 49 | if (fd < 0) { |
| 50 | perror("open file"); |
| 51 | return 1; |
| 52 | } |
| 53 | ret = write(fd, buf, FILE_SIZE); |
| 54 | close(fd); |
| 55 | return ret != FILE_SIZE; |
| 56 | } |
| 57 | |
| 58 | static int wait_io(struct io_uring *ring, int nr_ios) |
| 59 | { |
| 60 | struct io_uring_cqe *cqe; |
| 61 | |
| 62 | while (nr_ios) { |
| 63 | io_uring_wait_cqe(ring, &cqe); |
Jens Axboe | 48afc11 | 2020-09-08 07:42:41 -0600 | [diff] [blame^] | 64 | if (cqe->res != BS) { |
| 65 | fprintf(stderr, "Unexpected ret %d\n", cqe->res); |
| 66 | return 1; |
| 67 | } |
Jens Axboe | cad057f | 2020-09-05 11:58:08 -0600 | [diff] [blame] | 68 | io_uring_cqe_seen(ring, cqe); |
| 69 | nr_ios--; |
| 70 | } |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static int queue_io(struct io_uring *ring, const char *fname, int nr_ios) |
| 76 | { |
| 77 | unsigned long off; |
| 78 | int fd, ret, i; |
| 79 | |
| 80 | fd = open(fname, O_RDONLY | O_DIRECT); |
| 81 | if (fd < 0) { |
| 82 | perror("open"); |
| 83 | return -1; |
| 84 | } |
| 85 | |
| 86 | i = 0; |
| 87 | off = 0; |
| 88 | while (nr_ios) { |
| 89 | struct io_uring_sqe *sqe; |
| 90 | |
| 91 | sqe = io_uring_get_sqe(ring); |
| 92 | if (!sqe) |
| 93 | break; |
| 94 | io_uring_prep_read(sqe, fd, vecs[i].iov_base, vecs[i].iov_len, off); |
| 95 | nr_ios--; |
| 96 | i++; |
| 97 | off += BS; |
| 98 | } |
| 99 | |
| 100 | ret = io_uring_submit(ring); |
| 101 | close(fd); |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | int main(int argc, char *argv[]) |
| 106 | { |
| 107 | struct io_uring rings[NR_RINGS]; |
| 108 | int rets[NR_RINGS]; |
| 109 | unsigned long ios; |
| 110 | int i, ret; |
| 111 | char *fname; |
| 112 | |
| 113 | if (argc > 1) { |
| 114 | fname = argv[1]; |
| 115 | } else { |
| 116 | fname = ".basic-rw"; |
| 117 | if (create_file(fname)) { |
| 118 | fprintf(stderr, "file creation failed\n"); |
| 119 | goto err; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | if (create_buffers()) { |
| 124 | fprintf(stderr, "file creation failed\n"); |
| 125 | goto err; |
| 126 | } |
| 127 | |
| 128 | for (i = 0; i < NR_RINGS; i++) { |
| 129 | struct io_uring_params p = { }; |
| 130 | |
| 131 | p.flags = IORING_SETUP_SQPOLL; |
| 132 | if (i) { |
| 133 | p.wq_fd = rings[0].ring_fd; |
| 134 | p.flags |= IORING_SETUP_ATTACH_WQ; |
| 135 | } |
| 136 | ret = io_uring_queue_init_params(BUFFERS, &rings[i], &p); |
| 137 | if (ret) { |
| 138 | fprintf(stderr, "queue_init: %d/%d\n", ret, i); |
| 139 | goto err; |
| 140 | } |
Jens Axboe | 48afc11 | 2020-09-08 07:42:41 -0600 | [diff] [blame^] | 141 | /* no sharing for non-fixed either */ |
| 142 | if (!(p.features & IORING_FEAT_SQPOLL_NONFIXED)) { |
| 143 | fprintf(stdout, "No SQPOLL sharing, skipping\n"); |
| 144 | return 0; |
| 145 | } |
Jens Axboe | cad057f | 2020-09-05 11:58:08 -0600 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | ios = 0; |
| 149 | while (ios < (FILE_SIZE / BS)) { |
| 150 | for (i = 0; i < NR_RINGS; i++) { |
| 151 | ret = queue_io(&rings[i], fname, BUFFERS); |
| 152 | if (ret < 0) |
| 153 | goto err; |
| 154 | rets[i] = ret; |
| 155 | } |
Jens Axboe | 48afc11 | 2020-09-08 07:42:41 -0600 | [diff] [blame^] | 156 | for (i = 0; i < NR_RINGS; i++) { |
| 157 | if (wait_io(&rings[i], rets[i])) |
| 158 | goto err; |
| 159 | } |
Jens Axboe | cad057f | 2020-09-05 11:58:08 -0600 | [diff] [blame] | 160 | ios += BUFFERS; |
| 161 | } |
| 162 | |
| 163 | return 0; |
| 164 | err: |
| 165 | if (fname != argv[1]) |
| 166 | unlink(fname); |
| 167 | return 1; |
| 168 | } |