Commit | Line | Data |
---|---|---|
2866c82d | 1 | /* |
da751ca9 JA |
2 | * libaio engine |
3 | * | |
4 | * IO engine using the Linux native aio interface. | |
2866c82d JA |
5 | * |
6 | */ | |
7 | #include <stdio.h> | |
8 | #include <stdlib.h> | |
9 | #include <unistd.h> | |
10 | #include <errno.h> | |
11 | #include <assert.h> | |
5f350952 JA |
12 | |
13 | #include "../fio.h" | |
2866c82d | 14 | |
34cfcdaf JA |
15 | #ifdef FIO_HAVE_LIBAIO |
16 | ||
2866c82d JA |
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; | |
755200a3 | 22 | struct iocb **iocbs; |
7e77dd02 | 23 | struct io_u **io_us; |
755200a3 | 24 | int iocbs_nr; |
2866c82d JA |
25 | }; |
26 | ||
7a16dd02 | 27 | static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u) |
2866c82d | 28 | { |
53cdc686 JA |
29 | struct fio_file *f = io_u->file; |
30 | ||
2866c82d | 31 | if (io_u->ddir == DDIR_READ) |
cec6b55d | 32 | io_prep_pread(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); |
87dc1ab1 | 33 | else if (io_u->ddir == DDIR_WRITE) |
cec6b55d | 34 | io_prep_pwrite(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); |
5f9099ea | 35 | else if (ddir_sync(io_u->ddir)) |
87dc1ab1 | 36 | io_prep_fsync(&io_u->iocb, f->fd); |
2866c82d JA |
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; | |
f423479d JA |
44 | struct io_event *ev; |
45 | struct io_u *io_u; | |
2866c82d | 46 | |
f423479d JA |
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; | |
2866c82d JA |
59 | } |
60 | ||
e7d2e616 JA |
61 | static int fio_libaio_getevents(struct thread_data *td, unsigned int min, |
62 | unsigned int max, struct timespec *t) | |
2866c82d JA |
63 | { |
64 | struct libaio_data *ld = td->io_ops->data; | |
0b7fdba7 DE |
65 | unsigned actual_min = td->o.iodepth_batch_complete == 0 ? 0 : min; |
66 | int r, events = 0; | |
2866c82d JA |
67 | |
68 | do { | |
0b7fdba7 DE |
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) | |
2866c82d | 73 | usleep(100); |
0b7fdba7 DE |
74 | } while (events < min); |
75 | ||
76 | return r < 0 ? r : events; | |
2866c82d JA |
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; | |
2866c82d | 82 | |
7101d9c2 JA |
83 | fio_ro_check(td, io_u); |
84 | ||
2dc1bbeb | 85 | if (ld->iocbs_nr == (int) td->o.iodepth) |
755200a3 JA |
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 | */ | |
f011531e | 94 | if (ddir_sync(io_u->ddir)) { |
755200a3 JA |
95 | if (ld->iocbs_nr) |
96 | return FIO_Q_BUSY; | |
5f9099ea | 97 | |
f011531e | 98 | do_io_u_sync(td, io_u); |
755200a3 JA |
99 | return FIO_Q_COMPLETED; |
100 | } | |
101 | ||
a5f3027c JA |
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 | ||
755200a3 | 110 | ld->iocbs[ld->iocbs_nr] = &io_u->iocb; |
7e77dd02 | 111 | ld->io_us[ld->iocbs_nr] = io_u; |
755200a3 JA |
112 | ld->iocbs_nr++; |
113 | return FIO_Q_QUEUED; | |
114 | } | |
115 | ||
7e77dd02 JA |
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 | ||
12d9d841 JA |
122 | if (!fio_fill_issue_time(td)) |
123 | return; | |
124 | ||
7e77dd02 JA |
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 | ||
755200a3 JA |
135 | static int fio_libaio_commit(struct thread_data *td) |
136 | { | |
137 | struct libaio_data *ld = td->io_ops->data; | |
138 | struct iocb **iocbs; | |
7e77dd02 | 139 | struct io_u **io_us; |
5e00c2c4 | 140 | int ret; |
755200a3 JA |
141 | |
142 | if (!ld->iocbs_nr) | |
143 | return 0; | |
144 | ||
7e77dd02 | 145 | io_us = ld->io_us; |
755200a3 | 146 | iocbs = ld->iocbs; |
2866c82d | 147 | do { |
5e00c2c4 JA |
148 | ret = io_submit(ld->aio_ctx, ld->iocbs_nr, iocbs); |
149 | if (ret > 0) { | |
7e77dd02 | 150 | fio_libaio_queued(td, io_us, ret); |
838bc709 | 151 | io_u_mark_submit(td, ret); |
5e00c2c4 | 152 | ld->iocbs_nr -= ret; |
7e77dd02 | 153 | io_us += ret; |
755200a3 | 154 | iocbs += ret; |
5e00c2c4 | 155 | ret = 0; |
838bc709 JA |
156 | } else if (!ret || ret == -EAGAIN || ret == -EINTR) { |
157 | if (!ret) | |
158 | io_u_mark_submit(td, ret); | |
2866c82d | 159 | continue; |
838bc709 | 160 | } else |
2866c82d | 161 | break; |
5e00c2c4 | 162 | } while (ld->iocbs_nr); |
2866c82d | 163 | |
36167d82 | 164 | return ret; |
2866c82d JA |
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); | |
7e77dd02 JA |
180 | free(ld->aio_events); |
181 | free(ld->iocbs); | |
182 | free(ld->io_us); | |
2866c82d | 183 | free(ld); |
2866c82d JA |
184 | } |
185 | } | |
186 | ||
187 | static int fio_libaio_init(struct thread_data *td) | |
188 | { | |
189 | struct libaio_data *ld = malloc(sizeof(*ld)); | |
c1db2dce | 190 | int err; |
2866c82d JA |
191 | |
192 | memset(ld, 0, sizeof(*ld)); | |
c1db2dce JA |
193 | |
194 | err = io_queue_init(td->o.iodepth, &ld->aio_ctx); | |
195 | if (err) { | |
196 | td_verror(td, -err, "io_queue_init"); | |
75de55ac | 197 | log_err("fio: check /proc/sys/fs/aio-max-nr\n"); |
cb781c75 | 198 | free(ld); |
2866c82d JA |
199 | return 1; |
200 | } | |
201 | ||
2dc1bbeb JA |
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 *)); | |
755200a3 | 205 | memset(ld->iocbs, 0, sizeof(struct iocb *)); |
2dc1bbeb JA |
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 *)); | |
755200a3 JA |
208 | ld->iocbs_nr = 0; |
209 | ||
2866c82d JA |
210 | td->io_ops->data = ld; |
211 | return 0; | |
212 | } | |
213 | ||
5f350952 | 214 | static struct ioengine_ops ioengine = { |
2866c82d JA |
215 | .name = "libaio", |
216 | .version = FIO_IOOPS_VERSION, | |
217 | .init = fio_libaio_init, | |
218 | .prep = fio_libaio_prep, | |
219 | .queue = fio_libaio_queue, | |
755200a3 | 220 | .commit = fio_libaio_commit, |
2866c82d JA |
221 | .cancel = fio_libaio_cancel, |
222 | .getevents = fio_libaio_getevents, | |
223 | .event = fio_libaio_event, | |
224 | .cleanup = fio_libaio_cleanup, | |
b5af8293 JA |
225 | .open_file = generic_open_file, |
226 | .close_file = generic_close_file, | |
df9c26b1 | 227 | .get_file_size = generic_get_file_size, |
2866c82d | 228 | }; |
34cfcdaf JA |
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 | { | |
a3edaf76 | 239 | log_err("fio: libaio not available\n"); |
34cfcdaf JA |
240 | return 1; |
241 | } | |
242 | ||
5f350952 | 243 | static struct ioengine_ops ioengine = { |
34cfcdaf JA |
244 | .name = "libaio", |
245 | .version = FIO_IOOPS_VERSION, | |
246 | .init = fio_libaio_init, | |
247 | }; | |
248 | ||
249 | #endif | |
5f350952 JA |
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 | } |