Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 1 | /* |
Jens Axboe | da751ca | 2007-03-14 10:59:33 +0100 | [diff] [blame] | 2 | * libaio engine |
| 3 | * |
| 4 | * IO engine using the Linux native aio interface. |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 5 | * |
| 6 | */ |
| 7 | #include <stdio.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <unistd.h> |
| 10 | #include <errno.h> |
| 11 | #include <assert.h> |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 12 | |
| 13 | #include "../fio.h" |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 14 | |
Jens Axboe | 34cfcda | 2006-11-03 14:00:45 +0100 | [diff] [blame] | 15 | #ifdef FIO_HAVE_LIBAIO |
| 16 | |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 17 | #define ev_to_iou(ev) (struct io_u *) ((unsigned long) (ev)->obj) |
| 18 | |
| 19 | struct libaio_data { |
| 20 | io_context_t aio_ctx; |
| 21 | struct io_event *aio_events; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 22 | struct iocb **iocbs; |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 23 | struct io_u **io_us; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 24 | int iocbs_nr; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 25 | }; |
| 26 | |
Jens Axboe | 7a16dd0 | 2006-10-18 17:21:58 +0200 | [diff] [blame] | 27 | static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u) |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 28 | { |
Jens Axboe | 53cdc68 | 2006-10-18 11:50:58 +0200 | [diff] [blame] | 29 | struct fio_file *f = io_u->file; |
| 30 | |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 31 | if (io_u->ddir == DDIR_READ) |
Jens Axboe | cec6b55 | 2007-02-06 20:15:38 +0100 | [diff] [blame] | 32 | io_prep_pread(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); |
Jens Axboe | 87dc1ab | 2006-10-24 14:41:26 +0200 | [diff] [blame] | 33 | else if (io_u->ddir == DDIR_WRITE) |
Jens Axboe | cec6b55 | 2007-02-06 20:15:38 +0100 | [diff] [blame] | 34 | io_prep_pwrite(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); |
Jens Axboe | 5f9099e | 2009-06-16 22:40:26 +0200 | [diff] [blame] | 35 | else if (ddir_sync(io_u->ddir)) |
Jens Axboe | 87dc1ab | 2006-10-24 14:41:26 +0200 | [diff] [blame] | 36 | io_prep_fsync(&io_u->iocb, f->fd); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static struct io_u *fio_libaio_event(struct thread_data *td, int event) |
| 42 | { |
| 43 | struct libaio_data *ld = td->io_ops->data; |
Jens Axboe | f423479 | 2007-03-02 15:16:03 +0100 | [diff] [blame] | 44 | struct io_event *ev; |
| 45 | struct io_u *io_u; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 46 | |
Jens Axboe | f423479 | 2007-03-02 15:16:03 +0100 | [diff] [blame] | 47 | ev = ld->aio_events + event; |
| 48 | io_u = ev_to_iou(ev); |
| 49 | |
| 50 | if (ev->res != io_u->xfer_buflen) { |
| 51 | if (ev->res > io_u->xfer_buflen) |
| 52 | io_u->error = -ev->res; |
| 53 | else |
| 54 | io_u->resid = io_u->xfer_buflen - ev->res; |
| 55 | } else |
| 56 | io_u->error = 0; |
| 57 | |
| 58 | return io_u; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 59 | } |
| 60 | |
Jens Axboe | e7d2e61 | 2007-12-11 10:49:39 +0100 | [diff] [blame] | 61 | static int fio_libaio_getevents(struct thread_data *td, unsigned int min, |
| 62 | unsigned int max, struct timespec *t) |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 63 | { |
| 64 | struct libaio_data *ld = td->io_ops->data; |
Dan Ehrenberg | 0b7fdba | 2011-07-23 13:36:46 +0200 | [diff] [blame^] | 65 | unsigned actual_min = td->o.iodepth_batch_complete == 0 ? 0 : min; |
| 66 | int r, events = 0; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 67 | |
| 68 | do { |
Dan Ehrenberg | 0b7fdba | 2011-07-23 13:36:46 +0200 | [diff] [blame^] | 69 | r = io_getevents(ld->aio_ctx, actual_min, max, ld->aio_events + events, t); |
| 70 | if (r >= 0) |
| 71 | events += r; |
| 72 | else if (r == -EAGAIN) |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 73 | usleep(100); |
Dan Ehrenberg | 0b7fdba | 2011-07-23 13:36:46 +0200 | [diff] [blame^] | 74 | } while (events < min); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 75 | |
Dan Ehrenberg | 0b7fdba | 2011-07-23 13:36:46 +0200 | [diff] [blame^] | 76 | return r < 0 ? r : events; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u) |
| 80 | { |
| 81 | struct libaio_data *ld = td->io_ops->data; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 82 | |
Jens Axboe | 7101d9c | 2007-09-12 13:12:39 +0200 | [diff] [blame] | 83 | fio_ro_check(td, io_u); |
| 84 | |
Jens Axboe | 2dc1bbe | 2007-03-15 15:01:33 +0100 | [diff] [blame] | 85 | if (ld->iocbs_nr == (int) td->o.iodepth) |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 86 | return FIO_Q_BUSY; |
| 87 | |
| 88 | /* |
| 89 | * fsync is tricky, since it can fail and we need to do it |
| 90 | * serialized with other io. the reason is that linux doesn't |
| 91 | * support aio fsync yet. So return busy for the case where we |
| 92 | * have pending io, to let fio complete those first. |
| 93 | */ |
Jens Axboe | f011531 | 2010-03-09 21:47:15 +0100 | [diff] [blame] | 94 | if (ddir_sync(io_u->ddir)) { |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 95 | if (ld->iocbs_nr) |
| 96 | return FIO_Q_BUSY; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 97 | |
Jens Axboe | f011531 | 2010-03-09 21:47:15 +0100 | [diff] [blame] | 98 | do_io_u_sync(td, io_u); |
Jens Axboe | 5f9099e | 2009-06-16 22:40:26 +0200 | [diff] [blame] | 99 | return FIO_Q_COMPLETED; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 100 | } |
| 101 | |
Jens Axboe | a5f3027 | 2010-07-19 16:19:55 -0600 | [diff] [blame] | 102 | if (io_u->ddir == DDIR_TRIM) { |
| 103 | if (ld->iocbs_nr) |
| 104 | return FIO_Q_BUSY; |
| 105 | |
| 106 | do_io_u_trim(td, io_u); |
| 107 | return FIO_Q_COMPLETED; |
| 108 | } |
| 109 | |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 110 | ld->iocbs[ld->iocbs_nr] = &io_u->iocb; |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 111 | ld->io_us[ld->iocbs_nr] = io_u; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 112 | ld->iocbs_nr++; |
| 113 | return FIO_Q_QUEUED; |
| 114 | } |
| 115 | |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 116 | static void fio_libaio_queued(struct thread_data *td, struct io_u **io_us, |
| 117 | unsigned int nr) |
| 118 | { |
| 119 | struct timeval now; |
| 120 | unsigned int i; |
| 121 | |
Jens Axboe | 12d9d84 | 2008-10-16 21:26:10 +0200 | [diff] [blame] | 122 | if (!fio_fill_issue_time(td)) |
| 123 | return; |
| 124 | |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 125 | fio_gettime(&now, NULL); |
| 126 | |
| 127 | for (i = 0; i < nr; i++) { |
| 128 | struct io_u *io_u = io_us[i]; |
| 129 | |
| 130 | memcpy(&io_u->issue_time, &now, sizeof(now)); |
| 131 | io_u_queued(td, io_u); |
| 132 | } |
| 133 | } |
| 134 | |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 135 | static int fio_libaio_commit(struct thread_data *td) |
| 136 | { |
| 137 | struct libaio_data *ld = td->io_ops->data; |
| 138 | struct iocb **iocbs; |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 139 | struct io_u **io_us; |
Jens Axboe | 5e00c2c | 2008-01-18 10:26:58 +0100 | [diff] [blame] | 140 | int ret; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 141 | |
| 142 | if (!ld->iocbs_nr) |
| 143 | return 0; |
| 144 | |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 145 | io_us = ld->io_us; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 146 | iocbs = ld->iocbs; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 147 | do { |
Jens Axboe | 5e00c2c | 2008-01-18 10:26:58 +0100 | [diff] [blame] | 148 | ret = io_submit(ld->aio_ctx, ld->iocbs_nr, iocbs); |
| 149 | if (ret > 0) { |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 150 | fio_libaio_queued(td, io_us, ret); |
Jens Axboe | 838bc70 | 2008-05-22 13:08:23 +0200 | [diff] [blame] | 151 | io_u_mark_submit(td, ret); |
Jens Axboe | 5e00c2c | 2008-01-18 10:26:58 +0100 | [diff] [blame] | 152 | ld->iocbs_nr -= ret; |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 153 | io_us += ret; |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 154 | iocbs += ret; |
Jens Axboe | 5e00c2c | 2008-01-18 10:26:58 +0100 | [diff] [blame] | 155 | ret = 0; |
Jens Axboe | 838bc70 | 2008-05-22 13:08:23 +0200 | [diff] [blame] | 156 | } else if (!ret || ret == -EAGAIN || ret == -EINTR) { |
| 157 | if (!ret) |
| 158 | io_u_mark_submit(td, ret); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 159 | continue; |
Jens Axboe | 838bc70 | 2008-05-22 13:08:23 +0200 | [diff] [blame] | 160 | } else |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 161 | break; |
Jens Axboe | 5e00c2c | 2008-01-18 10:26:58 +0100 | [diff] [blame] | 162 | } while (ld->iocbs_nr); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 163 | |
Jens Axboe | 36167d8 | 2007-02-18 05:41:31 +0100 | [diff] [blame] | 164 | return ret; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | static int fio_libaio_cancel(struct thread_data *td, struct io_u *io_u) |
| 168 | { |
| 169 | struct libaio_data *ld = td->io_ops->data; |
| 170 | |
| 171 | return io_cancel(ld->aio_ctx, &io_u->iocb, ld->aio_events); |
| 172 | } |
| 173 | |
| 174 | static void fio_libaio_cleanup(struct thread_data *td) |
| 175 | { |
| 176 | struct libaio_data *ld = td->io_ops->data; |
| 177 | |
| 178 | if (ld) { |
| 179 | io_destroy(ld->aio_ctx); |
Jens Axboe | 7e77dd0 | 2007-02-20 10:57:34 +0100 | [diff] [blame] | 180 | free(ld->aio_events); |
| 181 | free(ld->iocbs); |
| 182 | free(ld->io_us); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 183 | free(ld); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 184 | } |
| 185 | } |
| 186 | |
| 187 | static int fio_libaio_init(struct thread_data *td) |
| 188 | { |
| 189 | struct libaio_data *ld = malloc(sizeof(*ld)); |
Jens Axboe | c1db2dc | 2007-03-20 10:42:07 +0100 | [diff] [blame] | 190 | int err; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 191 | |
| 192 | memset(ld, 0, sizeof(*ld)); |
Jens Axboe | c1db2dc | 2007-03-20 10:42:07 +0100 | [diff] [blame] | 193 | |
| 194 | err = io_queue_init(td->o.iodepth, &ld->aio_ctx); |
| 195 | if (err) { |
| 196 | td_verror(td, -err, "io_queue_init"); |
Jens Axboe | 75de55a | 2008-04-10 20:52:40 +0200 | [diff] [blame] | 197 | log_err("fio: check /proc/sys/fs/aio-max-nr\n"); |
Jens Axboe | cb781c7 | 2006-11-07 14:02:48 +0100 | [diff] [blame] | 198 | free(ld); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 199 | return 1; |
| 200 | } |
| 201 | |
Jens Axboe | 2dc1bbe | 2007-03-15 15:01:33 +0100 | [diff] [blame] | 202 | ld->aio_events = malloc(td->o.iodepth * sizeof(struct io_event)); |
| 203 | memset(ld->aio_events, 0, td->o.iodepth * sizeof(struct io_event)); |
| 204 | ld->iocbs = malloc(td->o.iodepth * sizeof(struct iocb *)); |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 205 | memset(ld->iocbs, 0, sizeof(struct iocb *)); |
Jens Axboe | 2dc1bbe | 2007-03-15 15:01:33 +0100 | [diff] [blame] | 206 | ld->io_us = malloc(td->o.iodepth * sizeof(struct io_u *)); |
| 207 | memset(ld->io_us, 0, td->o.iodepth * sizeof(struct io_u *)); |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 208 | ld->iocbs_nr = 0; |
| 209 | |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 210 | td->io_ops->data = ld; |
| 211 | return 0; |
| 212 | } |
| 213 | |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 214 | static struct ioengine_ops ioengine = { |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 215 | .name = "libaio", |
| 216 | .version = FIO_IOOPS_VERSION, |
| 217 | .init = fio_libaio_init, |
| 218 | .prep = fio_libaio_prep, |
| 219 | .queue = fio_libaio_queue, |
Jens Axboe | 755200a | 2007-02-19 13:08:12 +0100 | [diff] [blame] | 220 | .commit = fio_libaio_commit, |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 221 | .cancel = fio_libaio_cancel, |
| 222 | .getevents = fio_libaio_getevents, |
| 223 | .event = fio_libaio_event, |
| 224 | .cleanup = fio_libaio_cleanup, |
Jens Axboe | b5af829 | 2007-03-08 12:43:13 +0100 | [diff] [blame] | 225 | .open_file = generic_open_file, |
| 226 | .close_file = generic_close_file, |
Jens Axboe | df9c26b | 2009-03-05 10:13:58 +0100 | [diff] [blame] | 227 | .get_file_size = generic_get_file_size, |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 228 | }; |
Jens Axboe | 34cfcda | 2006-11-03 14:00:45 +0100 | [diff] [blame] | 229 | |
| 230 | #else /* FIO_HAVE_LIBAIO */ |
| 231 | |
| 232 | /* |
| 233 | * When we have a proper configure system in place, we simply wont build |
| 234 | * and install this io engine. For now install a crippled version that |
| 235 | * just complains and fails to load. |
| 236 | */ |
| 237 | static int fio_libaio_init(struct thread_data fio_unused *td) |
| 238 | { |
Jens Axboe | a3edaf7 | 2010-09-26 10:53:40 +0900 | [diff] [blame] | 239 | log_err("fio: libaio not available\n"); |
Jens Axboe | 34cfcda | 2006-11-03 14:00:45 +0100 | [diff] [blame] | 240 | return 1; |
| 241 | } |
| 242 | |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 243 | static struct ioengine_ops ioengine = { |
Jens Axboe | 34cfcda | 2006-11-03 14:00:45 +0100 | [diff] [blame] | 244 | .name = "libaio", |
| 245 | .version = FIO_IOOPS_VERSION, |
| 246 | .init = fio_libaio_init, |
| 247 | }; |
| 248 | |
| 249 | #endif |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 250 | |
| 251 | static void fio_init fio_libaio_register(void) |
| 252 | { |
| 253 | register_ioengine(&ioengine); |
| 254 | } |
| 255 | |
| 256 | static void fio_exit fio_libaio_unregister(void) |
| 257 | { |
| 258 | unregister_ioengine(&ioengine); |
| 259 | } |