Commit | Line | Data |
---|---|---|
2866c82d JA |
1 | /* |
2 | * native linux aio io engine | |
3 | * | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <unistd.h> | |
8 | #include <errno.h> | |
9 | #include <assert.h> | |
5f350952 JA |
10 | |
11 | #include "../fio.h" | |
12 | #include "../os.h" | |
2866c82d | 13 | |
34cfcdaf JA |
14 | #ifdef FIO_HAVE_LIBAIO |
15 | ||
2866c82d JA |
16 | #define ev_to_iou(ev) (struct io_u *) ((unsigned long) (ev)->obj) |
17 | ||
18 | struct libaio_data { | |
19 | io_context_t aio_ctx; | |
20 | struct io_event *aio_events; | |
755200a3 | 21 | struct iocb **iocbs; |
7e77dd02 | 22 | struct io_u **io_us; |
755200a3 | 23 | int iocbs_nr; |
2866c82d JA |
24 | }; |
25 | ||
7a16dd02 | 26 | static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u) |
2866c82d | 27 | { |
53cdc686 JA |
28 | struct fio_file *f = io_u->file; |
29 | ||
2866c82d | 30 | if (io_u->ddir == DDIR_READ) |
cec6b55d | 31 | io_prep_pread(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); |
87dc1ab1 | 32 | else if (io_u->ddir == DDIR_WRITE) |
cec6b55d | 33 | io_prep_pwrite(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); |
87dc1ab1 JA |
34 | else if (io_u->ddir == DDIR_SYNC) |
35 | io_prep_fsync(&io_u->iocb, f->fd); | |
36 | else | |
37 | return 1; | |
2866c82d JA |
38 | |
39 | return 0; | |
40 | } | |
41 | ||
42 | static struct io_u *fio_libaio_event(struct thread_data *td, int event) | |
43 | { | |
44 | struct libaio_data *ld = td->io_ops->data; | |
f423479d JA |
45 | struct io_event *ev; |
46 | struct io_u *io_u; | |
2866c82d | 47 | |
f423479d JA |
48 | ev = ld->aio_events + event; |
49 | io_u = ev_to_iou(ev); | |
50 | ||
51 | if (ev->res != io_u->xfer_buflen) { | |
52 | if (ev->res > io_u->xfer_buflen) | |
53 | io_u->error = -ev->res; | |
54 | else | |
55 | io_u->resid = io_u->xfer_buflen - ev->res; | |
56 | } else | |
57 | io_u->error = 0; | |
58 | ||
59 | return io_u; | |
2866c82d JA |
60 | } |
61 | ||
62 | static int fio_libaio_getevents(struct thread_data *td, int min, int max, | |
63 | struct timespec *t) | |
64 | { | |
65 | struct libaio_data *ld = td->io_ops->data; | |
66 | long r; | |
67 | ||
68 | do { | |
69 | r = io_getevents(ld->aio_ctx, min, max, ld->aio_events, t); | |
ccbb91cb JA |
70 | if (r >= min) |
71 | break; | |
72 | else if (r == -EAGAIN) { | |
2866c82d JA |
73 | usleep(100); |
74 | continue; | |
75 | } else if (r == -EINTR) | |
76 | continue; | |
84585003 | 77 | else if (r != 0) |
2866c82d JA |
78 | break; |
79 | } while (1); | |
80 | ||
22819ec2 | 81 | return r; |
2866c82d JA |
82 | } |
83 | ||
84 | static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u) | |
85 | { | |
86 | struct libaio_data *ld = td->io_ops->data; | |
2866c82d | 87 | |
755200a3 JA |
88 | if (ld->iocbs_nr == (int) td->iodepth) |
89 | return FIO_Q_BUSY; | |
90 | ||
91 | /* | |
92 | * fsync is tricky, since it can fail and we need to do it | |
93 | * serialized with other io. the reason is that linux doesn't | |
94 | * support aio fsync yet. So return busy for the case where we | |
95 | * have pending io, to let fio complete those first. | |
96 | */ | |
97 | if (io_u->ddir == DDIR_SYNC) { | |
98 | if (ld->iocbs_nr) | |
99 | return FIO_Q_BUSY; | |
100 | if (fsync(io_u->file->fd) < 0) | |
101 | io_u->error = errno; | |
102 | ||
103 | return FIO_Q_COMPLETED; | |
104 | } | |
105 | ||
106 | ld->iocbs[ld->iocbs_nr] = &io_u->iocb; | |
7e77dd02 | 107 | ld->io_us[ld->iocbs_nr] = io_u; |
755200a3 JA |
108 | ld->iocbs_nr++; |
109 | return FIO_Q_QUEUED; | |
110 | } | |
111 | ||
7e77dd02 JA |
112 | static void fio_libaio_queued(struct thread_data *td, struct io_u **io_us, |
113 | unsigned int nr) | |
114 | { | |
115 | struct timeval now; | |
116 | unsigned int i; | |
117 | ||
118 | fio_gettime(&now, NULL); | |
119 | ||
120 | for (i = 0; i < nr; i++) { | |
121 | struct io_u *io_u = io_us[i]; | |
122 | ||
123 | memcpy(&io_u->issue_time, &now, sizeof(now)); | |
124 | io_u_queued(td, io_u); | |
125 | } | |
126 | } | |
127 | ||
755200a3 JA |
128 | static int fio_libaio_commit(struct thread_data *td) |
129 | { | |
130 | struct libaio_data *ld = td->io_ops->data; | |
131 | struct iocb **iocbs; | |
7e77dd02 | 132 | struct io_u **io_us; |
755200a3 JA |
133 | int ret, iocbs_nr; |
134 | ||
135 | if (!ld->iocbs_nr) | |
136 | return 0; | |
137 | ||
138 | iocbs_nr = ld->iocbs_nr; | |
7e77dd02 | 139 | io_us = ld->io_us; |
755200a3 | 140 | iocbs = ld->iocbs; |
2866c82d | 141 | do { |
755200a3 JA |
142 | ret = io_submit(ld->aio_ctx, iocbs_nr, iocbs); |
143 | if (ret == iocbs_nr) { | |
7e77dd02 | 144 | fio_libaio_queued(td, io_us, ret); |
755200a3 JA |
145 | ret = 0; |
146 | break; | |
147 | } else if (ret > 0) { | |
7e77dd02 JA |
148 | fio_libaio_queued(td, io_us, ret); |
149 | io_us += ret; | |
755200a3 JA |
150 | iocbs += ret; |
151 | iocbs_nr -= ret; | |
152 | continue; | |
153 | } else if (ret == -EAGAIN || !ret) | |
2866c82d JA |
154 | usleep(100); |
155 | else if (ret == -EINTR) | |
156 | continue; | |
755200a3 | 157 | else |
2866c82d JA |
158 | break; |
159 | } while (1); | |
160 | ||
755200a3 JA |
161 | if (!ret) |
162 | ld->iocbs_nr = 0; | |
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 JA |
183 | free(ld); |
184 | td->io_ops->data = NULL; | |
185 | } | |
186 | } | |
187 | ||
188 | static int fio_libaio_init(struct thread_data *td) | |
189 | { | |
190 | struct libaio_data *ld = malloc(sizeof(*ld)); | |
191 | ||
192 | memset(ld, 0, sizeof(*ld)); | |
193 | if (io_queue_init(td->iodepth, &ld->aio_ctx)) { | |
e1161c32 | 194 | td_verror(td, errno, "io_queue_init"); |
cb781c75 | 195 | free(ld); |
2866c82d JA |
196 | return 1; |
197 | } | |
198 | ||
199 | ld->aio_events = malloc(td->iodepth * sizeof(struct io_event)); | |
84585003 | 200 | memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event)); |
755200a3 JA |
201 | ld->iocbs = malloc(td->iodepth * sizeof(struct iocb *)); |
202 | memset(ld->iocbs, 0, sizeof(struct iocb *)); | |
7e77dd02 JA |
203 | ld->io_us = malloc(td->iodepth * sizeof(struct io_u *)); |
204 | memset(ld->io_us, 0, td->iodepth * sizeof(struct io_u *)); | |
755200a3 JA |
205 | ld->iocbs_nr = 0; |
206 | ||
2866c82d JA |
207 | td->io_ops->data = ld; |
208 | return 0; | |
209 | } | |
210 | ||
5f350952 | 211 | static struct ioengine_ops ioengine = { |
2866c82d JA |
212 | .name = "libaio", |
213 | .version = FIO_IOOPS_VERSION, | |
214 | .init = fio_libaio_init, | |
215 | .prep = fio_libaio_prep, | |
216 | .queue = fio_libaio_queue, | |
755200a3 | 217 | .commit = fio_libaio_commit, |
2866c82d JA |
218 | .cancel = fio_libaio_cancel, |
219 | .getevents = fio_libaio_getevents, | |
220 | .event = fio_libaio_event, | |
221 | .cleanup = fio_libaio_cleanup, | |
b5af8293 JA |
222 | .open_file = generic_open_file, |
223 | .close_file = generic_close_file, | |
2866c82d | 224 | }; |
34cfcdaf JA |
225 | |
226 | #else /* FIO_HAVE_LIBAIO */ | |
227 | ||
228 | /* | |
229 | * When we have a proper configure system in place, we simply wont build | |
230 | * and install this io engine. For now install a crippled version that | |
231 | * just complains and fails to load. | |
232 | */ | |
233 | static int fio_libaio_init(struct thread_data fio_unused *td) | |
234 | { | |
235 | fprintf(stderr, "fio: libaio not available\n"); | |
236 | return 1; | |
237 | } | |
238 | ||
5f350952 | 239 | static struct ioengine_ops ioengine = { |
34cfcdaf JA |
240 | .name = "libaio", |
241 | .version = FIO_IOOPS_VERSION, | |
242 | .init = fio_libaio_init, | |
243 | }; | |
244 | ||
245 | #endif | |
5f350952 JA |
246 | |
247 | static void fio_init fio_libaio_register(void) | |
248 | { | |
249 | register_ioengine(&ioengine); | |
250 | } | |
251 | ||
252 | static void fio_exit fio_libaio_unregister(void) | |
253 | { | |
254 | unregister_ioengine(&ioengine); | |
255 | } |