Commit | Line | Data |
---|---|---|
a94ea28b | 1 | /* |
da751ca9 JA |
2 | * null engine |
3 | * | |
4 | * IO engine that doesn't do any real IO transfers, it just pretends to. | |
5 | * The main purpose is to test fio itself. | |
a94ea28b | 6 | * |
46a67478 DG |
7 | * It also can act as external C++ engine - compiled with: |
8 | * | |
cef0a835 | 9 | * g++ -O2 -g -shared -rdynamic -fPIC -o cpp_null null.c \ |
c822572d | 10 | * -include ../config-host.h -DFIO_EXTERNAL_ENGINE |
966fcbd4 | 11 | * |
12 | * to test it execute: | |
13 | * | |
14 | * LD_LIBRARY_PATH=./engines ./fio examples/cpp_null.fio | |
46a67478 | 15 | * |
a94ea28b | 16 | */ |
a94ea28b | 17 | #include <stdlib.h> |
a94ea28b JA |
18 | #include <assert.h> |
19 | ||
20 | #include "../fio.h" | |
a94ea28b | 21 | |
65afa5f2 JA |
22 | struct null_data { |
23 | struct io_u **io_us; | |
24 | int queued; | |
25 | int events; | |
26 | }; | |
27 | ||
966fcbd4 | 28 | static struct io_u *null_event(struct null_data *nd, int event) |
65afa5f2 | 29 | { |
65afa5f2 JA |
30 | return nd->io_us[event]; |
31 | } | |
32 | ||
966fcbd4 | 33 | static int null_getevents(struct null_data *nd, unsigned int min_events, |
34 | unsigned int fio_unused max, | |
35 | const struct timespec fio_unused *t) | |
65afa5f2 | 36 | { |
7401c088 | 37 | int ret = 0; |
966fcbd4 | 38 | |
7401c088 JA |
39 | if (min_events) { |
40 | ret = nd->events; | |
41 | nd->events = 0; | |
42 | } | |
65afa5f2 | 43 | |
65afa5f2 JA |
44 | return ret; |
45 | } | |
46 | ||
56b6bc25 VF |
47 | static void null_queued(struct thread_data *td, struct null_data *nd) |
48 | { | |
49 | struct timespec now; | |
50 | ||
51 | if (!fio_fill_issue_time(td)) | |
52 | return; | |
53 | ||
54 | fio_gettime(&now, NULL); | |
55 | ||
56 | for (int i = 0; i < nd->queued; i++) { | |
57 | struct io_u *io_u = nd->io_us[i]; | |
58 | ||
59 | memcpy(&io_u->issue_time, &now, sizeof(now)); | |
60 | io_u_queued(td, io_u); | |
61 | } | |
62 | } | |
63 | ||
966fcbd4 | 64 | static int null_commit(struct thread_data *td, struct null_data *nd) |
65afa5f2 | 65 | { |
ed8bd849 | 66 | if (!nd->events) { |
56b6bc25 VF |
67 | null_queued(td, nd); |
68 | ||
46a67478 | 69 | #ifndef FIO_EXTERNAL_ENGINE |
838bc709 | 70 | io_u_mark_submit(td, nd->queued); |
46a67478 | 71 | #endif |
ed8bd849 JA |
72 | nd->events = nd->queued; |
73 | nd->queued = 0; | |
74 | } | |
75 | ||
65afa5f2 JA |
76 | return 0; |
77 | } | |
78 | ||
2e4ef4fb JA |
79 | static enum fio_q_status null_queue(struct thread_data *td, |
80 | struct null_data *nd, struct io_u *io_u) | |
a94ea28b | 81 | { |
7101d9c2 JA |
82 | fio_ro_check(td, io_u); |
83 | ||
65afa5f2 JA |
84 | if (td->io_ops->flags & FIO_SYNCIO) |
85 | return FIO_Q_COMPLETED; | |
ed8bd849 JA |
86 | if (nd->events) |
87 | return FIO_Q_BUSY; | |
65afa5f2 JA |
88 | |
89 | nd->io_us[nd->queued++] = io_u; | |
90 | return FIO_Q_QUEUED; | |
a94ea28b JA |
91 | } |
92 | ||
966fcbd4 | 93 | static int null_open(struct null_data fio_unused *nd, |
94 | struct fio_file fio_unused *f) | |
b5af8293 JA |
95 | { |
96 | return 0; | |
97 | } | |
98 | ||
966fcbd4 | 99 | static void null_cleanup(struct null_data *nd) |
65afa5f2 | 100 | { |
65afa5f2 | 101 | if (nd) { |
02a3d83f | 102 | free(nd->io_us); |
65afa5f2 | 103 | free(nd); |
65afa5f2 JA |
104 | } |
105 | } | |
106 | ||
7746976c | 107 | static struct null_data *null_init(struct thread_data *td) |
65afa5f2 | 108 | { |
a93259c9 VF |
109 | struct null_data *nd; |
110 | nd = malloc(sizeof(*nd)); | |
65afa5f2 JA |
111 | |
112 | memset(nd, 0, sizeof(*nd)); | |
113 | ||
2dc1bbeb | 114 | if (td->o.iodepth != 1) { |
223decdd | 115 | nd->io_us = calloc(td->o.iodepth, sizeof(struct io_u *)); |
d54ae223 | 116 | td->io_ops->flags |= FIO_ASYNCIO_SETS_ISSUE_TIME; |
65afa5f2 JA |
117 | } else |
118 | td->io_ops->flags |= FIO_SYNCIO; | |
119 | ||
d54ae223 | 120 | td_set_ioengine_flags(td); |
7746976c | 121 | return nd; |
65afa5f2 JA |
122 | } |
123 | ||
46a67478 | 124 | #ifndef __cplusplus |
966fcbd4 | 125 | |
126 | static struct io_u *fio_null_event(struct thread_data *td, int event) | |
127 | { | |
ca65714c | 128 | return null_event(td->io_ops_data, event); |
966fcbd4 | 129 | } |
130 | ||
131 | static int fio_null_getevents(struct thread_data *td, unsigned int min_events, | |
132 | unsigned int max, const struct timespec *t) | |
133 | { | |
ca65714c | 134 | struct null_data *nd = td->io_ops_data; |
966fcbd4 | 135 | return null_getevents(nd, min_events, max, t); |
136 | } | |
137 | ||
138 | static int fio_null_commit(struct thread_data *td) | |
139 | { | |
ca65714c | 140 | return null_commit(td, td->io_ops_data); |
966fcbd4 | 141 | } |
142 | ||
2e4ef4fb JA |
143 | static enum fio_q_status fio_null_queue(struct thread_data *td, |
144 | struct io_u *io_u) | |
966fcbd4 | 145 | { |
ca65714c | 146 | return null_queue(td, td->io_ops_data, io_u); |
966fcbd4 | 147 | } |
148 | ||
149 | static int fio_null_open(struct thread_data *td, struct fio_file *f) | |
150 | { | |
ca65714c | 151 | return null_open(td->io_ops_data, f); |
966fcbd4 | 152 | } |
153 | ||
154 | static void fio_null_cleanup(struct thread_data *td) | |
155 | { | |
ca65714c | 156 | null_cleanup(td->io_ops_data); |
966fcbd4 | 157 | } |
158 | ||
159 | static int fio_null_init(struct thread_data *td) | |
160 | { | |
7746976c TK |
161 | td->io_ops_data = null_init(td); |
162 | assert(td->io_ops_data); | |
163 | return 0; | |
966fcbd4 | 164 | } |
165 | ||
a94ea28b JA |
166 | static struct ioengine_ops ioengine = { |
167 | .name = "null", | |
168 | .version = FIO_IOOPS_VERSION, | |
a94ea28b | 169 | .queue = fio_null_queue, |
65afa5f2 JA |
170 | .commit = fio_null_commit, |
171 | .getevents = fio_null_getevents, | |
172 | .event = fio_null_event, | |
173 | .init = fio_null_init, | |
174 | .cleanup = fio_null_cleanup, | |
b5af8293 | 175 | .open_file = fio_null_open, |
5c57c084 | 176 | .flags = FIO_DISKLESSIO | FIO_FAKEIO, |
a94ea28b JA |
177 | }; |
178 | ||
179 | static void fio_init fio_null_register(void) | |
180 | { | |
181 | register_ioengine(&ioengine); | |
182 | } | |
183 | ||
184 | static void fio_exit fio_null_unregister(void) | |
185 | { | |
186 | unregister_ioengine(&ioengine); | |
187 | } | |
46a67478 DG |
188 | |
189 | #else | |
190 | ||
191 | #ifdef FIO_EXTERNAL_ENGINE | |
966fcbd4 | 192 | |
193 | struct NullData { | |
194 | NullData(struct thread_data *td) | |
195 | { | |
7746976c TK |
196 | impl_ = null_init(td); |
197 | assert(impl_); | |
966fcbd4 | 198 | } |
199 | ||
200 | ~NullData() | |
201 | { | |
202 | null_cleanup(impl_); | |
203 | } | |
204 | ||
205 | static NullData *get(struct thread_data *td) | |
206 | { | |
207 | return reinterpret_cast<NullData *>(td->io_ops_data); | |
208 | } | |
209 | ||
210 | io_u *fio_null_event(struct thread_data *, int event) | |
211 | { | |
212 | return null_event(impl_, event); | |
213 | } | |
214 | ||
215 | int fio_null_getevents(struct thread_data *, unsigned int min_events, | |
216 | unsigned int max, const struct timespec *t) | |
217 | { | |
218 | return null_getevents(impl_, min_events, max, t); | |
219 | } | |
220 | ||
221 | int fio_null_commit(struct thread_data *td) | |
222 | { | |
223 | return null_commit(td, impl_); | |
224 | } | |
225 | ||
cef0a835 | 226 | fio_q_status fio_null_queue(struct thread_data *td, struct io_u *io_u) |
966fcbd4 | 227 | { |
228 | return null_queue(td, impl_, io_u); | |
229 | } | |
230 | ||
231 | int fio_null_open(struct thread_data *, struct fio_file *f) | |
232 | { | |
233 | return null_open(impl_, f); | |
234 | } | |
235 | ||
7caf10f1 | 236 | private: |
966fcbd4 | 237 | struct null_data *impl_; |
238 | }; | |
239 | ||
46a67478 | 240 | extern "C" { |
966fcbd4 | 241 | |
242 | static struct io_u *fio_null_event(struct thread_data *td, int event) | |
243 | { | |
244 | return NullData::get(td)->fio_null_event(td, event); | |
245 | } | |
246 | ||
247 | static int fio_null_getevents(struct thread_data *td, unsigned int min_events, | |
248 | unsigned int max, const struct timespec *t) | |
249 | { | |
250 | return NullData::get(td)->fio_null_getevents(td, min_events, max, t); | |
251 | } | |
252 | ||
253 | static int fio_null_commit(struct thread_data *td) | |
254 | { | |
255 | return NullData::get(td)->fio_null_commit(td); | |
256 | } | |
257 | ||
cef0a835 | 258 | static fio_q_status fio_null_queue(struct thread_data *td, struct io_u *io_u) |
966fcbd4 | 259 | { |
260 | return NullData::get(td)->fio_null_queue(td, io_u); | |
261 | } | |
262 | ||
263 | static int fio_null_open(struct thread_data *td, struct fio_file *f) | |
264 | { | |
265 | return NullData::get(td)->fio_null_open(td, f); | |
266 | } | |
267 | ||
268 | static int fio_null_init(struct thread_data *td) | |
269 | { | |
270 | td->io_ops_data = new NullData(td); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static void fio_null_cleanup(struct thread_data *td) | |
275 | { | |
276 | delete NullData::get(td); | |
277 | } | |
278 | ||
247f299a | 279 | static struct ioengine_ops ioengine; |
8d6ecac2 JA |
280 | void get_ioengine(struct ioengine_ops **ioengine_ptr) |
281 | { | |
247f299a TK |
282 | *ioengine_ptr = &ioengine; |
283 | ||
284 | ioengine.name = "cpp_null"; | |
285 | ioengine.version = FIO_IOOPS_VERSION; | |
286 | ioengine.queue = fio_null_queue; | |
287 | ioengine.commit = fio_null_commit; | |
288 | ioengine.getevents = fio_null_getevents; | |
289 | ioengine.event = fio_null_event; | |
290 | ioengine.init = fio_null_init; | |
291 | ioengine.cleanup = fio_null_cleanup; | |
292 | ioengine.open_file = fio_null_open; | |
293 | ioengine.flags = FIO_DISKLESSIO | FIO_FAKEIO; | |
46a67478 DG |
294 | } |
295 | } | |
296 | #endif /* FIO_EXTERNAL_ENGINE */ | |
297 | ||
298 | #endif /* __cplusplus */ |