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" | |
14 | #include "../os.h" | |
2866c82d | 15 | |
34cfcdaf JA |
16 | #ifdef FIO_HAVE_POSIXAIO |
17 | ||
2866c82d JA |
18 | struct posixaio_data { |
19 | struct io_u **aio_events; | |
20 | }; | |
21 | ||
22 | static int fill_timespec(struct timespec *ts) | |
23 | { | |
24 | #ifdef _POSIX_TIMERS | |
25 | if (!clock_gettime(CLOCK_MONOTONIC, ts)) | |
26 | return 0; | |
27 | ||
28 | perror("clock_gettime"); | |
29 | #endif | |
30 | return 1; | |
31 | } | |
32 | ||
33 | static unsigned long long ts_utime_since_now(struct timespec *t) | |
34 | { | |
35 | long long sec, nsec; | |
36 | struct timespec now; | |
37 | ||
38 | if (fill_timespec(&now)) | |
39 | return 0; | |
40 | ||
41 | sec = now.tv_sec - t->tv_sec; | |
42 | nsec = now.tv_nsec - t->tv_nsec; | |
43 | if (sec > 0 && nsec < 0) { | |
44 | sec--; | |
45 | nsec += 1000000000; | |
46 | } | |
47 | ||
48 | sec *= 1000000; | |
49 | nsec /= 1000; | |
50 | return sec + nsec; | |
51 | } | |
52 | ||
7a16dd02 JA |
53 | static int fio_posixaio_cancel(struct thread_data fio_unused *td, |
54 | struct io_u *io_u) | |
2866c82d | 55 | { |
53cdc686 JA |
56 | struct fio_file *f = io_u->file; |
57 | int r = aio_cancel(f->fd, &io_u->aiocb); | |
2866c82d JA |
58 | |
59 | if (r == 1 || r == AIO_CANCELED) | |
60 | return 0; | |
61 | ||
62 | return 1; | |
63 | } | |
64 | ||
7a16dd02 JA |
65 | static int fio_posixaio_prep(struct thread_data fio_unused *td, |
66 | struct io_u *io_u) | |
2866c82d JA |
67 | { |
68 | struct aiocb *aiocb = &io_u->aiocb; | |
53cdc686 | 69 | struct fio_file *f = io_u->file; |
2866c82d | 70 | |
53cdc686 | 71 | aiocb->aio_fildes = f->fd; |
cec6b55d JA |
72 | aiocb->aio_buf = io_u->xfer_buf; |
73 | aiocb->aio_nbytes = io_u->xfer_buflen; | |
2866c82d JA |
74 | aiocb->aio_offset = io_u->offset; |
75 | ||
76 | io_u->seen = 0; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static int fio_posixaio_getevents(struct thread_data *td, int min, int max, | |
81 | struct timespec *t) | |
82 | { | |
83 | struct posixaio_data *pd = td->io_ops->data; | |
84 | struct list_head *entry; | |
85 | struct timespec start; | |
86 | int r, have_timeout = 0; | |
87 | ||
88 | if (t && !fill_timespec(&start)) | |
89 | have_timeout = 1; | |
90 | ||
91 | r = 0; | |
92 | restart: | |
93 | list_for_each(entry, &td->io_u_busylist) { | |
94 | struct io_u *io_u = list_entry(entry, struct io_u, list); | |
95 | int err; | |
96 | ||
97 | if (io_u->seen) | |
98 | continue; | |
99 | ||
100 | err = aio_error(&io_u->aiocb); | |
3f344316 JA |
101 | if (err == EINPROGRESS) |
102 | continue; | |
103 | ||
104 | io_u->seen = 1; | |
105 | pd->aio_events[r++] = io_u; | |
106 | ||
107 | if (err == ECANCELED) | |
108 | io_u->resid = io_u->xfer_buflen; | |
109 | else if (!err) { | |
110 | ssize_t retval = aio_return(&io_u->aiocb); | |
111 | ||
112 | io_u->resid = io_u->xfer_buflen - retval; | |
113 | } else | |
114 | io_u->error = err; | |
2866c82d JA |
115 | |
116 | if (r >= max) | |
117 | break; | |
118 | } | |
119 | ||
120 | if (r >= min) | |
121 | return r; | |
122 | ||
123 | if (have_timeout) { | |
124 | unsigned long long usec; | |
125 | ||
126 | usec = (t->tv_sec * 1000000) + (t->tv_nsec / 1000); | |
127 | if (ts_utime_since_now(&start) > usec) | |
128 | return r; | |
129 | } | |
130 | ||
131 | /* | |
132 | * hrmpf, we need to wait for more. we should use aio_suspend, for | |
133 | * now just sleep a little and recheck status of busy-and-not-seen | |
134 | */ | |
135 | usleep(1000); | |
136 | goto restart; | |
137 | } | |
138 | ||
139 | static struct io_u *fio_posixaio_event(struct thread_data *td, int event) | |
140 | { | |
141 | struct posixaio_data *pd = td->io_ops->data; | |
142 | ||
143 | return pd->aio_events[event]; | |
144 | } | |
145 | ||
146 | static int fio_posixaio_queue(struct thread_data fio_unused *td, | |
147 | struct io_u *io_u) | |
148 | { | |
149 | struct aiocb *aiocb = &io_u->aiocb; | |
150 | int ret; | |
151 | ||
152 | if (io_u->ddir == DDIR_READ) | |
153 | ret = aio_read(aiocb); | |
87dc1ab1 | 154 | else if (io_u->ddir == DDIR_WRITE) |
2866c82d | 155 | ret = aio_write(aiocb); |
87dc1ab1 JA |
156 | else |
157 | ret = aio_fsync(O_SYNC, aiocb); | |
2866c82d | 158 | |
95bcd815 | 159 | if (ret) { |
2866c82d | 160 | io_u->error = errno; |
e1161c32 | 161 | td_verror(td, io_u->error, "xfer"); |
36167d82 | 162 | return FIO_Q_COMPLETED; |
95bcd815 | 163 | } |
36167d82 JA |
164 | |
165 | return FIO_Q_QUEUED; | |
2866c82d JA |
166 | } |
167 | ||
168 | static void fio_posixaio_cleanup(struct thread_data *td) | |
169 | { | |
170 | struct posixaio_data *pd = td->io_ops->data; | |
171 | ||
172 | if (pd) { | |
173 | free(pd->aio_events); | |
174 | free(pd); | |
175 | td->io_ops->data = NULL; | |
176 | } | |
177 | } | |
178 | ||
179 | static int fio_posixaio_init(struct thread_data *td) | |
180 | { | |
181 | struct posixaio_data *pd = malloc(sizeof(*pd)); | |
182 | ||
cb781c75 | 183 | memset(pd, 0, sizeof(*pd)); |
2dc1bbeb JA |
184 | pd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u *)); |
185 | memset(pd->aio_events, 0, td->o.iodepth * sizeof(struct io_u *)); | |
2866c82d JA |
186 | |
187 | td->io_ops->data = pd; | |
188 | return 0; | |
189 | } | |
190 | ||
5f350952 | 191 | static struct ioengine_ops ioengine = { |
2866c82d JA |
192 | .name = "posixaio", |
193 | .version = FIO_IOOPS_VERSION, | |
194 | .init = fio_posixaio_init, | |
195 | .prep = fio_posixaio_prep, | |
196 | .queue = fio_posixaio_queue, | |
197 | .cancel = fio_posixaio_cancel, | |
198 | .getevents = fio_posixaio_getevents, | |
199 | .event = fio_posixaio_event, | |
200 | .cleanup = fio_posixaio_cleanup, | |
b5af8293 JA |
201 | .open_file = generic_open_file, |
202 | .close_file = generic_close_file, | |
2866c82d | 203 | }; |
34cfcdaf JA |
204 | |
205 | #else /* FIO_HAVE_POSIXAIO */ | |
206 | ||
207 | /* | |
208 | * When we have a proper configure system in place, we simply wont build | |
209 | * and install this io engine. For now install a crippled version that | |
210 | * just complains and fails to load. | |
211 | */ | |
212 | static int fio_posixaio_init(struct thread_data fio_unused *td) | |
213 | { | |
214 | fprintf(stderr, "fio: posixaio not available\n"); | |
215 | return 1; | |
216 | } | |
217 | ||
5f350952 | 218 | static struct ioengine_ops ioengine = { |
34cfcdaf JA |
219 | .name = "posixaio", |
220 | .version = FIO_IOOPS_VERSION, | |
221 | .init = fio_posixaio_init, | |
222 | }; | |
223 | ||
224 | #endif | |
5f350952 JA |
225 | |
226 | static void fio_init fio_posixaio_register(void) | |
227 | { | |
228 | register_ioengine(&ioengine); | |
229 | } | |
230 | ||
231 | static void fio_exit fio_posixaio_unregister(void) | |
232 | { | |
233 | unregister_ioengine(&ioengine); | |
234 | } |