Commit | Line | Data |
---|---|---|
2866c82d | 1 | /* |
da751ca9 JA |
2 | * posixaio engine |
3 | * | |
4 | * IO engine that uses the posix defined 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_POSIXAIO |
16 | ||
2866c82d JA |
17 | struct posixaio_data { |
18 | struct io_u **aio_events; | |
19 | }; | |
20 | ||
21 | static int fill_timespec(struct timespec *ts) | |
22 | { | |
23 | #ifdef _POSIX_TIMERS | |
24 | if (!clock_gettime(CLOCK_MONOTONIC, ts)) | |
25 | return 0; | |
26 | ||
27 | perror("clock_gettime"); | |
28 | #endif | |
29 | return 1; | |
30 | } | |
31 | ||
32 | static unsigned long long ts_utime_since_now(struct timespec *t) | |
33 | { | |
34 | long long sec, nsec; | |
35 | struct timespec now; | |
36 | ||
37 | if (fill_timespec(&now)) | |
38 | return 0; | |
39 | ||
40 | sec = now.tv_sec - t->tv_sec; | |
41 | nsec = now.tv_nsec - t->tv_nsec; | |
42 | if (sec > 0 && nsec < 0) { | |
43 | sec--; | |
44 | nsec += 1000000000; | |
45 | } | |
46 | ||
47 | sec *= 1000000; | |
48 | nsec /= 1000; | |
49 | return sec + nsec; | |
50 | } | |
51 | ||
7a16dd02 JA |
52 | static int fio_posixaio_cancel(struct thread_data fio_unused *td, |
53 | struct io_u *io_u) | |
2866c82d | 54 | { |
53cdc686 JA |
55 | struct fio_file *f = io_u->file; |
56 | int r = aio_cancel(f->fd, &io_u->aiocb); | |
2866c82d JA |
57 | |
58 | if (r == 1 || r == AIO_CANCELED) | |
59 | return 0; | |
60 | ||
61 | return 1; | |
62 | } | |
63 | ||
7a16dd02 JA |
64 | static int fio_posixaio_prep(struct thread_data fio_unused *td, |
65 | struct io_u *io_u) | |
2866c82d JA |
66 | { |
67 | struct aiocb *aiocb = &io_u->aiocb; | |
53cdc686 | 68 | struct fio_file *f = io_u->file; |
2866c82d | 69 | |
53cdc686 | 70 | aiocb->aio_fildes = f->fd; |
cec6b55d JA |
71 | aiocb->aio_buf = io_u->xfer_buf; |
72 | aiocb->aio_nbytes = io_u->xfer_buflen; | |
2866c82d JA |
73 | aiocb->aio_offset = io_u->offset; |
74 | ||
75 | io_u->seen = 0; | |
76 | return 0; | |
77 | } | |
78 | ||
e7d2e616 JA |
79 | static int fio_posixaio_getevents(struct thread_data *td, unsigned int min, |
80 | unsigned int max, struct timespec *t) | |
2866c82d JA |
81 | { |
82 | struct posixaio_data *pd = td->io_ops->data; | |
83 | struct list_head *entry; | |
84 | struct timespec start; | |
85 | int r, have_timeout = 0; | |
86 | ||
87 | if (t && !fill_timespec(&start)) | |
88 | have_timeout = 1; | |
89 | ||
90 | r = 0; | |
91 | restart: | |
92 | list_for_each(entry, &td->io_u_busylist) { | |
93 | struct io_u *io_u = list_entry(entry, struct io_u, list); | |
94 | int err; | |
95 | ||
96 | if (io_u->seen) | |
97 | continue; | |
98 | ||
99 | err = aio_error(&io_u->aiocb); | |
3f344316 JA |
100 | if (err == EINPROGRESS) |
101 | continue; | |
102 | ||
103 | io_u->seen = 1; | |
104 | pd->aio_events[r++] = io_u; | |
105 | ||
106 | if (err == ECANCELED) | |
107 | io_u->resid = io_u->xfer_buflen; | |
108 | else if (!err) { | |
109 | ssize_t retval = aio_return(&io_u->aiocb); | |
110 | ||
111 | io_u->resid = io_u->xfer_buflen - retval; | |
112 | } else | |
113 | io_u->error = err; | |
2866c82d JA |
114 | |
115 | if (r >= max) | |
116 | break; | |
117 | } | |
118 | ||
119 | if (r >= min) | |
120 | return r; | |
121 | ||
122 | if (have_timeout) { | |
123 | unsigned long long usec; | |
124 | ||
125 | usec = (t->tv_sec * 1000000) + (t->tv_nsec / 1000); | |
126 | if (ts_utime_since_now(&start) > usec) | |
127 | return r; | |
128 | } | |
129 | ||
130 | /* | |
131 | * hrmpf, we need to wait for more. we should use aio_suspend, for | |
132 | * now just sleep a little and recheck status of busy-and-not-seen | |
133 | */ | |
134 | usleep(1000); | |
135 | goto restart; | |
136 | } | |
137 | ||
138 | static struct io_u *fio_posixaio_event(struct thread_data *td, int event) | |
139 | { | |
140 | struct posixaio_data *pd = td->io_ops->data; | |
141 | ||
142 | return pd->aio_events[event]; | |
143 | } | |
144 | ||
145 | static int fio_posixaio_queue(struct thread_data fio_unused *td, | |
146 | struct io_u *io_u) | |
147 | { | |
148 | struct aiocb *aiocb = &io_u->aiocb; | |
149 | int ret; | |
150 | ||
7101d9c2 JA |
151 | fio_ro_check(td, io_u); |
152 | ||
2866c82d JA |
153 | if (io_u->ddir == DDIR_READ) |
154 | ret = aio_read(aiocb); | |
87dc1ab1 | 155 | else if (io_u->ddir == DDIR_WRITE) |
2866c82d | 156 | ret = aio_write(aiocb); |
87dc1ab1 JA |
157 | else |
158 | ret = aio_fsync(O_SYNC, aiocb); | |
2866c82d | 159 | |
95bcd815 | 160 | if (ret) { |
2866c82d | 161 | io_u->error = errno; |
e1161c32 | 162 | td_verror(td, io_u->error, "xfer"); |
36167d82 | 163 | return FIO_Q_COMPLETED; |
95bcd815 | 164 | } |
36167d82 JA |
165 | |
166 | return FIO_Q_QUEUED; | |
2866c82d JA |
167 | } |
168 | ||
169 | static void fio_posixaio_cleanup(struct thread_data *td) | |
170 | { | |
171 | struct posixaio_data *pd = td->io_ops->data; | |
172 | ||
173 | if (pd) { | |
174 | free(pd->aio_events); | |
175 | free(pd); | |
176 | td->io_ops->data = NULL; | |
177 | } | |
178 | } | |
179 | ||
180 | static int fio_posixaio_init(struct thread_data *td) | |
181 | { | |
182 | struct posixaio_data *pd = malloc(sizeof(*pd)); | |
183 | ||
cb781c75 | 184 | memset(pd, 0, sizeof(*pd)); |
2dc1bbeb JA |
185 | pd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u *)); |
186 | memset(pd->aio_events, 0, td->o.iodepth * sizeof(struct io_u *)); | |
2866c82d JA |
187 | |
188 | td->io_ops->data = pd; | |
189 | return 0; | |
190 | } | |
191 | ||
5f350952 | 192 | static struct ioengine_ops ioengine = { |
2866c82d JA |
193 | .name = "posixaio", |
194 | .version = FIO_IOOPS_VERSION, | |
195 | .init = fio_posixaio_init, | |
196 | .prep = fio_posixaio_prep, | |
197 | .queue = fio_posixaio_queue, | |
198 | .cancel = fio_posixaio_cancel, | |
199 | .getevents = fio_posixaio_getevents, | |
200 | .event = fio_posixaio_event, | |
201 | .cleanup = fio_posixaio_cleanup, | |
b5af8293 JA |
202 | .open_file = generic_open_file, |
203 | .close_file = generic_close_file, | |
2866c82d | 204 | }; |
34cfcdaf JA |
205 | |
206 | #else /* FIO_HAVE_POSIXAIO */ | |
207 | ||
208 | /* | |
209 | * When we have a proper configure system in place, we simply wont build | |
210 | * and install this io engine. For now install a crippled version that | |
211 | * just complains and fails to load. | |
212 | */ | |
213 | static int fio_posixaio_init(struct thread_data fio_unused *td) | |
214 | { | |
215 | fprintf(stderr, "fio: posixaio not available\n"); | |
216 | return 1; | |
217 | } | |
218 | ||
5f350952 | 219 | static struct ioengine_ops ioengine = { |
34cfcdaf JA |
220 | .name = "posixaio", |
221 | .version = FIO_IOOPS_VERSION, | |
222 | .init = fio_posixaio_init, | |
223 | }; | |
224 | ||
225 | #endif | |
5f350952 JA |
226 | |
227 | static void fio_init fio_posixaio_register(void) | |
228 | { | |
229 | register_ioengine(&ioengine); | |
230 | } | |
231 | ||
232 | static void fio_exit fio_posixaio_unregister(void) | |
233 | { | |
234 | unregister_ioengine(&ioengine); | |
235 | } |