Commit | Line | Data |
---|---|---|
2866c82d JA |
1 | /* |
2 | * posix 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_POSIXAIO |
15 | ||
2866c82d JA |
16 | struct posixaio_data { |
17 | struct io_u **aio_events; | |
18 | }; | |
19 | ||
20 | static int fill_timespec(struct timespec *ts) | |
21 | { | |
22 | #ifdef _POSIX_TIMERS | |
23 | if (!clock_gettime(CLOCK_MONOTONIC, ts)) | |
24 | return 0; | |
25 | ||
26 | perror("clock_gettime"); | |
27 | #endif | |
28 | return 1; | |
29 | } | |
30 | ||
31 | static unsigned long long ts_utime_since_now(struct timespec *t) | |
32 | { | |
33 | long long sec, nsec; | |
34 | struct timespec now; | |
35 | ||
36 | if (fill_timespec(&now)) | |
37 | return 0; | |
38 | ||
39 | sec = now.tv_sec - t->tv_sec; | |
40 | nsec = now.tv_nsec - t->tv_nsec; | |
41 | if (sec > 0 && nsec < 0) { | |
42 | sec--; | |
43 | nsec += 1000000000; | |
44 | } | |
45 | ||
46 | sec *= 1000000; | |
47 | nsec /= 1000; | |
48 | return sec + nsec; | |
49 | } | |
50 | ||
7a16dd02 JA |
51 | static int fio_posixaio_cancel(struct thread_data fio_unused *td, |
52 | struct io_u *io_u) | |
2866c82d | 53 | { |
53cdc686 JA |
54 | struct fio_file *f = io_u->file; |
55 | int r = aio_cancel(f->fd, &io_u->aiocb); | |
2866c82d JA |
56 | |
57 | if (r == 1 || r == AIO_CANCELED) | |
58 | return 0; | |
59 | ||
60 | return 1; | |
61 | } | |
62 | ||
7a16dd02 JA |
63 | static int fio_posixaio_prep(struct thread_data fio_unused *td, |
64 | struct io_u *io_u) | |
2866c82d JA |
65 | { |
66 | struct aiocb *aiocb = &io_u->aiocb; | |
53cdc686 | 67 | struct fio_file *f = io_u->file; |
2866c82d | 68 | |
53cdc686 | 69 | aiocb->aio_fildes = f->fd; |
cec6b55d JA |
70 | aiocb->aio_buf = io_u->xfer_buf; |
71 | aiocb->aio_nbytes = io_u->xfer_buflen; | |
2866c82d JA |
72 | aiocb->aio_offset = io_u->offset; |
73 | ||
74 | io_u->seen = 0; | |
75 | return 0; | |
76 | } | |
77 | ||
78 | static int fio_posixaio_getevents(struct thread_data *td, int min, int max, | |
79 | struct timespec *t) | |
80 | { | |
81 | struct posixaio_data *pd = td->io_ops->data; | |
82 | struct list_head *entry; | |
83 | struct timespec start; | |
84 | int r, have_timeout = 0; | |
85 | ||
86 | if (t && !fill_timespec(&start)) | |
87 | have_timeout = 1; | |
88 | ||
89 | r = 0; | |
90 | restart: | |
91 | list_for_each(entry, &td->io_u_busylist) { | |
92 | struct io_u *io_u = list_entry(entry, struct io_u, list); | |
93 | int err; | |
94 | ||
95 | if (io_u->seen) | |
96 | continue; | |
97 | ||
98 | err = aio_error(&io_u->aiocb); | |
99 | switch (err) { | |
100 | default: | |
101 | io_u->error = err; | |
102 | case ECANCELED: | |
fd1ff8ed | 103 | io_u->resid = io_u->xfer_buflen; |
2866c82d JA |
104 | case 0: |
105 | pd->aio_events[r++] = io_u; | |
106 | io_u->seen = 1; | |
107 | break; | |
108 | case EINPROGRESS: | |
109 | break; | |
110 | } | |
111 | ||
112 | if (r >= max) | |
113 | break; | |
114 | } | |
115 | ||
116 | if (r >= min) | |
117 | return r; | |
118 | ||
119 | if (have_timeout) { | |
120 | unsigned long long usec; | |
121 | ||
122 | usec = (t->tv_sec * 1000000) + (t->tv_nsec / 1000); | |
123 | if (ts_utime_since_now(&start) > usec) | |
124 | return r; | |
125 | } | |
126 | ||
127 | /* | |
128 | * hrmpf, we need to wait for more. we should use aio_suspend, for | |
129 | * now just sleep a little and recheck status of busy-and-not-seen | |
130 | */ | |
131 | usleep(1000); | |
132 | goto restart; | |
133 | } | |
134 | ||
135 | static struct io_u *fio_posixaio_event(struct thread_data *td, int event) | |
136 | { | |
137 | struct posixaio_data *pd = td->io_ops->data; | |
138 | ||
139 | return pd->aio_events[event]; | |
140 | } | |
141 | ||
142 | static int fio_posixaio_queue(struct thread_data fio_unused *td, | |
143 | struct io_u *io_u) | |
144 | { | |
145 | struct aiocb *aiocb = &io_u->aiocb; | |
146 | int ret; | |
147 | ||
148 | if (io_u->ddir == DDIR_READ) | |
149 | ret = aio_read(aiocb); | |
87dc1ab1 | 150 | else if (io_u->ddir == DDIR_WRITE) |
2866c82d | 151 | ret = aio_write(aiocb); |
87dc1ab1 JA |
152 | else |
153 | ret = aio_fsync(O_SYNC, aiocb); | |
2866c82d | 154 | |
95bcd815 | 155 | if (ret) { |
2866c82d | 156 | io_u->error = errno; |
e1161c32 | 157 | td_verror(td, io_u->error, "xfer"); |
36167d82 | 158 | return FIO_Q_COMPLETED; |
95bcd815 | 159 | } |
36167d82 JA |
160 | |
161 | return FIO_Q_QUEUED; | |
2866c82d JA |
162 | } |
163 | ||
164 | static void fio_posixaio_cleanup(struct thread_data *td) | |
165 | { | |
166 | struct posixaio_data *pd = td->io_ops->data; | |
167 | ||
168 | if (pd) { | |
169 | free(pd->aio_events); | |
170 | free(pd); | |
171 | td->io_ops->data = NULL; | |
172 | } | |
173 | } | |
174 | ||
175 | static int fio_posixaio_init(struct thread_data *td) | |
176 | { | |
177 | struct posixaio_data *pd = malloc(sizeof(*pd)); | |
178 | ||
cb781c75 | 179 | memset(pd, 0, sizeof(*pd)); |
2866c82d | 180 | pd->aio_events = malloc(td->iodepth * sizeof(struct io_u *)); |
cb781c75 | 181 | memset(pd->aio_events, 0, td->iodepth * sizeof(struct io_u *)); |
2866c82d JA |
182 | |
183 | td->io_ops->data = pd; | |
184 | return 0; | |
185 | } | |
186 | ||
5f350952 | 187 | static struct ioengine_ops ioengine = { |
2866c82d JA |
188 | .name = "posixaio", |
189 | .version = FIO_IOOPS_VERSION, | |
190 | .init = fio_posixaio_init, | |
191 | .prep = fio_posixaio_prep, | |
192 | .queue = fio_posixaio_queue, | |
193 | .cancel = fio_posixaio_cancel, | |
194 | .getevents = fio_posixaio_getevents, | |
195 | .event = fio_posixaio_event, | |
196 | .cleanup = fio_posixaio_cleanup, | |
b5af8293 JA |
197 | .open_file = generic_open_file, |
198 | .close_file = generic_close_file, | |
2866c82d | 199 | }; |
34cfcdaf JA |
200 | |
201 | #else /* FIO_HAVE_POSIXAIO */ | |
202 | ||
203 | /* | |
204 | * When we have a proper configure system in place, we simply wont build | |
205 | * and install this io engine. For now install a crippled version that | |
206 | * just complains and fails to load. | |
207 | */ | |
208 | static int fio_posixaio_init(struct thread_data fio_unused *td) | |
209 | { | |
210 | fprintf(stderr, "fio: posixaio not available\n"); | |
211 | return 1; | |
212 | } | |
213 | ||
5f350952 | 214 | static struct ioengine_ops ioengine = { |
34cfcdaf JA |
215 | .name = "posixaio", |
216 | .version = FIO_IOOPS_VERSION, | |
217 | .init = fio_posixaio_init, | |
218 | }; | |
219 | ||
220 | #endif | |
5f350952 JA |
221 | |
222 | static void fio_init fio_posixaio_register(void) | |
223 | { | |
224 | register_ioengine(&ioengine); | |
225 | } | |
226 | ||
227 | static void fio_exit fio_posixaio_unregister(void) | |
228 | { | |
229 | unregister_ioengine(&ioengine); | |
230 | } |