Commit | Line | Data |
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609342ff DL |
1 | /* |
2 | * guasi engine | |
3 | * | |
4 | * IO engine using the GUASI library. | |
5 | * | |
6 | * This is currently disabled, add -lguasi to the fio Makefile target | |
7 | * and add a #define FIO_HAVE_GUASI to os-linux.h to enable it. You'll | |
8 | * need the GUASI lib as well: | |
9 | * | |
10 | * http://www.xmailserver.org/guasi-lib.html | |
11 | * | |
12 | */ | |
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <errno.h> | |
17 | #include <assert.h> | |
18 | ||
19 | #include "../fio.h" | |
20 | #include "../os.h" | |
21 | ||
22 | #ifdef FIO_HAVE_GUASI | |
23 | ||
24 | #define GFIO_MIN_THREADS 32 | |
25 | ||
26 | #include <guasi.h> | |
27 | #include <guasi_syscalls.h> | |
28 | ||
29 | #ifdef GFIO_DEBUG | |
30 | #define GDBG_PRINT(a) printf a | |
31 | #else | |
32 | #define GDBG_PRINT(a) (void) 0 | |
33 | #endif | |
34 | ||
35 | #define STFU_GCC(a) a = a | |
36 | ||
37 | ||
38 | struct guasi_data { | |
39 | guasi_t hctx; | |
40 | int max_reqs; | |
41 | guasi_req_t *reqs; | |
42 | struct io_u **io_us; | |
43 | int reqs_nr; | |
44 | }; | |
45 | ||
46 | static int fio_guasi_prep(struct thread_data fio_unused *td, struct io_u *io_u) | |
47 | { | |
48 | STFU_GCC(io_u); | |
49 | ||
50 | GDBG_PRINT(("fio_guasi_prep(%p)\n", io_u)); | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | static struct io_u *fio_guasi_event(struct thread_data *td, int event) | |
56 | { | |
57 | struct guasi_data *ld = td->io_ops->data; | |
58 | struct io_u *io_u; | |
59 | struct guasi_reqinfo rinf; | |
60 | ||
61 | GDBG_PRINT(("fio_guasi_event(%d)\n", event)); | |
62 | if (guasi_req_info(ld->reqs[event], &rinf) < 0) { | |
63 | fprintf(stderr, "guasi_req_info(%d) FAILED!\n", event); | |
64 | return NULL; | |
65 | } | |
66 | io_u = rinf.asid; | |
67 | GDBG_PRINT(("fio_guasi_event(%d) -> %p\n", event, io_u)); | |
68 | ||
69 | if (io_u->ddir == DDIR_READ || | |
70 | io_u->ddir == DDIR_WRITE) { | |
71 | if (rinf.result != (long) io_u->xfer_buflen) { | |
72 | if (rinf.result < 0) | |
73 | io_u->error = rinf.error; | |
74 | else | |
75 | io_u->resid = io_u->xfer_buflen - rinf.result; | |
76 | } else | |
77 | io_u->error = 0; | |
78 | } else | |
79 | io_u->error = rinf.result; | |
80 | ||
81 | return io_u; | |
82 | } | |
83 | ||
84 | static int fio_guasi_getevents(struct thread_data *td, int min, int max, | |
85 | struct timespec *t) | |
86 | { | |
87 | struct guasi_data *ld = td->io_ops->data; | |
88 | int n = 0, r; | |
89 | long timeo = -1; | |
90 | ||
91 | GDBG_PRINT(("fio_guasi_getevents(%d, %d)\n", min, max)); | |
92 | if (min > ld->max_reqs) | |
93 | min = ld->max_reqs; | |
94 | if (max > ld->max_reqs) | |
95 | max = ld->max_reqs; | |
96 | if (t) | |
97 | timeo = t->tv_sec * 1000L + t->tv_nsec / 1000000L; | |
98 | do { | |
99 | r = guasi_fetch(ld->hctx, ld->reqs + n, max - n, timeo); | |
100 | if (r < 0) | |
101 | break; | |
102 | n += r; | |
103 | if (n >= min) | |
104 | break; | |
105 | } while (1); | |
106 | GDBG_PRINT(("fio_guasi_getevents() -> %d\n", n)); | |
107 | ||
108 | return n; | |
109 | } | |
110 | ||
111 | static int fio_guasi_queue(struct thread_data *td, struct io_u *io_u) | |
112 | { | |
113 | struct guasi_data *ld = td->io_ops->data; | |
114 | ||
115 | GDBG_PRINT(("fio_guasi_queue(%p)\n", io_u)); | |
116 | if (ld->reqs_nr == (int) td->iodepth) | |
117 | return FIO_Q_BUSY; | |
118 | ||
119 | ld->io_us[ld->reqs_nr] = io_u; | |
120 | ld->reqs_nr++; | |
121 | return FIO_Q_QUEUED; | |
122 | } | |
123 | ||
124 | static void fio_guasi_queued(struct thread_data *td, struct io_u **io_us, | |
125 | unsigned int nr) | |
126 | { | |
127 | struct timeval now; | |
128 | struct io_u *io_u = io_us[nr]; | |
129 | ||
130 | fio_gettime(&now, NULL); | |
131 | memcpy(&io_u->issue_time, &now, sizeof(now)); | |
132 | io_u_queued(td, io_u); | |
133 | } | |
134 | ||
135 | static int fio_guasi_commit(struct thread_data *td) | |
136 | { | |
137 | struct guasi_data *ld = td->io_ops->data; | |
138 | int i; | |
139 | struct io_u *io_u; | |
140 | struct fio_file *f; | |
141 | ||
142 | GDBG_PRINT(("fio_guasi_commit()\n")); | |
143 | for (i = 0; i < ld->reqs_nr; i++) { | |
144 | io_u = ld->io_us[i]; | |
145 | f = io_u->file; | |
146 | io_u->greq = NULL; | |
147 | if (io_u->ddir == DDIR_READ) | |
148 | io_u->greq = guasi__pread(ld->hctx, ld, io_u, 0, | |
149 | f->fd, io_u->xfer_buf, io_u->xfer_buflen, | |
150 | io_u->offset); | |
151 | else if (io_u->ddir == DDIR_WRITE) | |
152 | io_u->greq = guasi__pwrite(ld->hctx, ld, io_u, 0, | |
153 | f->fd, io_u->xfer_buf, io_u->xfer_buflen, | |
154 | io_u->offset); | |
155 | else if (io_u->ddir == DDIR_SYNC) | |
156 | io_u->greq = guasi__fsync(ld->hctx, ld, io_u, 0, f->fd); | |
157 | else { | |
158 | fprintf(stderr, "fio_guasi_commit() FAILED: %d\n", io_u->ddir); | |
159 | } | |
160 | if (io_u->greq != NULL) | |
161 | fio_guasi_queued(td, ld->io_us, i); | |
162 | } | |
163 | ld->reqs_nr = 0; | |
164 | GDBG_PRINT(("fio_guasi_commit() -> %d\n", i)); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | static int fio_guasi_cancel(struct thread_data *td, struct io_u *io_u) | |
170 | { | |
171 | struct guasi_data *ld = td->io_ops->data; | |
172 | ||
173 | STFU_GCC(ld); | |
174 | GDBG_PRINT(("fio_guasi_cancel(%p)\n", io_u)); | |
175 | ||
176 | return guasi_req_cancel(io_u->greq); | |
177 | } | |
178 | ||
179 | static void fio_guasi_cleanup(struct thread_data *td) | |
180 | { | |
181 | struct guasi_data *ld = td->io_ops->data; | |
182 | ||
183 | if (ld) { | |
184 | guasi_free(ld->hctx); | |
185 | free(ld->reqs); | |
186 | free(ld->io_us); | |
187 | free(ld); | |
188 | td->io_ops->data = NULL; | |
189 | } | |
190 | } | |
191 | ||
192 | static int fio_guasi_init(struct thread_data *td) | |
193 | { | |
194 | int maxthr; | |
195 | struct guasi_data *ld = malloc(sizeof(*ld)); | |
196 | ||
197 | GDBG_PRINT(("fio_guasi_init(): depth=%d\n", td->iodepth)); | |
198 | memset(ld, 0, sizeof(*ld)); | |
199 | maxthr = td->iodepth > GFIO_MIN_THREADS ? td->iodepth: GFIO_MIN_THREADS; | |
200 | if ((ld->hctx = guasi_create(GFIO_MIN_THREADS, maxthr, 1)) == NULL) { | |
201 | td_verror(td, errno, "guasi_create"); | |
202 | free(ld); | |
203 | return 1; | |
204 | } | |
205 | ld->max_reqs = td->iodepth; | |
206 | ld->reqs = malloc(ld->max_reqs * sizeof(guasi_req_t)); | |
207 | ld->io_us = malloc(ld->max_reqs * sizeof(struct io_u *)); | |
208 | memset(ld->io_us, 0, ld->max_reqs * sizeof(struct io_u *)); | |
209 | ld->reqs_nr = 0; | |
210 | ||
211 | td->io_ops->data = ld; | |
212 | GDBG_PRINT(("fio_guasi_init(): depth=%d -> %p\n", td->iodepth, ld)); | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | static struct ioengine_ops ioengine = { | |
218 | .name = "guasi", | |
219 | .version = FIO_IOOPS_VERSION, | |
220 | .init = fio_guasi_init, | |
221 | .prep = fio_guasi_prep, | |
222 | .queue = fio_guasi_queue, | |
223 | .commit = fio_guasi_commit, | |
224 | .cancel = fio_guasi_cancel, | |
225 | .getevents = fio_guasi_getevents, | |
226 | .event = fio_guasi_event, | |
227 | .cleanup = fio_guasi_cleanup, | |
228 | .open_file = generic_open_file, | |
229 | .close_file = generic_close_file, | |
230 | }; | |
231 | ||
232 | #else /* FIO_HAVE_GUASI */ | |
233 | ||
234 | /* | |
235 | * When we have a proper configure system in place, we simply wont build | |
236 | * and install this io engine. For now install a crippled version that | |
237 | * just complains and fails to load. | |
238 | */ | |
239 | static int fio_guasi_init(struct thread_data fio_unused *td) | |
240 | { | |
241 | fprintf(stderr, "fio: guasi not available\n"); | |
242 | return 1; | |
243 | } | |
244 | ||
245 | static struct ioengine_ops ioengine = { | |
246 | .name = "guasi", | |
247 | .version = FIO_IOOPS_VERSION, | |
248 | .init = fio_guasi_init, | |
249 | }; | |
250 | ||
251 | #endif | |
252 | ||
253 | static void fio_init fio_guasi_register(void) | |
254 | { | |
255 | register_ioengine(&ioengine); | |
256 | } | |
257 | ||
258 | static void fio_exit fio_guasi_unregister(void) | |
259 | { | |
260 | unregister_ioengine(&ioengine); | |
261 | } | |
262 |