Commit | Line | Data |
---|---|---|
52885fa2 | 1 | /* |
bffad86f | 2 | * io_uring engine |
52885fa2 | 3 | * |
bffad86f | 4 | * IO engine using the new native Linux aio io_uring interface. See: |
a90cd050 | 5 | * |
bffad86f | 6 | * http://git.kernel.dk/cgit/linux-block/log/?h=io_uring |
52885fa2 JA |
7 | * |
8 | */ | |
9 | #include <stdlib.h> | |
10 | #include <unistd.h> | |
11 | #include <errno.h> | |
52885fa2 JA |
12 | #include <sys/time.h> |
13 | #include <sys/resource.h> | |
14 | ||
15 | #include "../fio.h" | |
16 | #include "../lib/pow2.h" | |
17 | #include "../optgroup.h" | |
18 | #include "../lib/memalign.h" | |
b87aa01a | 19 | #include "../lib/fls.h" |
52885fa2 | 20 | |
bffad86f | 21 | #ifdef ARCH_HAVE_IOURING |
52885fa2 | 22 | |
57fa61f0 | 23 | #include "../lib/types.h" |
bffad86f | 24 | #include "../os/io_uring.h" |
9a2d78b3 | 25 | |
bffad86f | 26 | struct io_sq_ring { |
e2239016 JA |
27 | unsigned *head; |
28 | unsigned *tail; | |
29 | unsigned *ring_mask; | |
30 | unsigned *ring_entries; | |
31 | unsigned *flags; | |
32 | unsigned *array; | |
52885fa2 JA |
33 | }; |
34 | ||
bffad86f | 35 | struct io_cq_ring { |
e2239016 JA |
36 | unsigned *head; |
37 | unsigned *tail; | |
38 | unsigned *ring_mask; | |
39 | unsigned *ring_entries; | |
f0403f94 | 40 | struct io_uring_cqe *cqes; |
9a2d78b3 JA |
41 | }; |
42 | ||
bffad86f | 43 | struct ioring_mmap { |
9a2d78b3 JA |
44 | void *ptr; |
45 | size_t len; | |
52885fa2 JA |
46 | }; |
47 | ||
bffad86f | 48 | struct ioring_data { |
9a2d78b3 JA |
49 | int ring_fd; |
50 | ||
52885fa2 JA |
51 | struct io_u **io_us; |
52 | struct io_u **io_u_index; | |
53 | ||
bffad86f | 54 | struct io_sq_ring sq_ring; |
f0403f94 | 55 | struct io_uring_sqe *sqes; |
9a2d78b3 | 56 | struct iovec *iovecs; |
b87aa01a | 57 | unsigned sq_ring_mask; |
52885fa2 | 58 | |
bffad86f | 59 | struct io_cq_ring cq_ring; |
b87aa01a | 60 | unsigned cq_ring_mask; |
52885fa2 JA |
61 | |
62 | int queued; | |
63 | int cq_ring_off; | |
b87aa01a | 64 | unsigned iodepth; |
96563db9 JA |
65 | |
66 | uint64_t cachehit; | |
67 | uint64_t cachemiss; | |
9a2d78b3 | 68 | |
bffad86f | 69 | struct ioring_mmap mmap[3]; |
52885fa2 JA |
70 | }; |
71 | ||
bffad86f | 72 | struct ioring_options { |
52885fa2 JA |
73 | void *pad; |
74 | unsigned int hipri; | |
75 | unsigned int fixedbufs; | |
3d7d00a3 | 76 | unsigned int sqpoll_thread; |
2ea53ca3 JA |
77 | unsigned int sqpoll_set; |
78 | unsigned int sqpoll_cpu; | |
52885fa2 JA |
79 | }; |
80 | ||
2ea53ca3 | 81 | static int fio_ioring_sqpoll_cb(void *data, unsigned long long *val) |
a90cd050 | 82 | { |
bffad86f | 83 | struct ioring_options *o = data; |
a90cd050 | 84 | |
2ea53ca3 JA |
85 | o->sqpoll_cpu = *val; |
86 | o->sqpoll_set = 1; | |
a90cd050 JA |
87 | return 0; |
88 | } | |
89 | ||
52885fa2 JA |
90 | static struct fio_option options[] = { |
91 | { | |
92 | .name = "hipri", | |
93 | .lname = "High Priority", | |
94 | .type = FIO_OPT_STR_SET, | |
bffad86f | 95 | .off1 = offsetof(struct ioring_options, hipri), |
52885fa2 JA |
96 | .help = "Use polled IO completions", |
97 | .category = FIO_OPT_C_ENGINE, | |
98 | .group = FIO_OPT_G_LIBAIO, | |
99 | }, | |
100 | { | |
101 | .name = "fixedbufs", | |
102 | .lname = "Fixed (pre-mapped) IO buffers", | |
103 | .type = FIO_OPT_STR_SET, | |
bffad86f | 104 | .off1 = offsetof(struct ioring_options, fixedbufs), |
52885fa2 JA |
105 | .help = "Pre map IO buffers", |
106 | .category = FIO_OPT_C_ENGINE, | |
107 | .group = FIO_OPT_G_LIBAIO, | |
108 | }, | |
771c9901 JA |
109 | { |
110 | .name = "sqthread_poll", | |
3d7d00a3 JA |
111 | .lname = "Kernel SQ thread polling", |
112 | .type = FIO_OPT_INT, | |
113 | .off1 = offsetof(struct ioring_options, sqpoll_thread), | |
114 | .help = "Offload submission/completion to kernel thread", | |
115 | .category = FIO_OPT_C_ENGINE, | |
116 | .group = FIO_OPT_G_LIBAIO, | |
117 | }, | |
118 | { | |
119 | .name = "sqthread_poll_cpu", | |
120 | .lname = "SQ Thread Poll CPU", | |
2ea53ca3 JA |
121 | .type = FIO_OPT_INT, |
122 | .cb = fio_ioring_sqpoll_cb, | |
3d7d00a3 | 123 | .help = "What CPU to run SQ thread polling on", |
a90cd050 JA |
124 | .category = FIO_OPT_C_ENGINE, |
125 | .group = FIO_OPT_G_LIBAIO, | |
126 | }, | |
52885fa2 JA |
127 | { |
128 | .name = NULL, | |
129 | }, | |
130 | }; | |
131 | ||
bffad86f | 132 | static int io_uring_enter(struct ioring_data *ld, unsigned int to_submit, |
52885fa2 JA |
133 | unsigned int min_complete, unsigned int flags) |
134 | { | |
9a2d78b3 JA |
135 | return syscall(__NR_sys_io_uring_enter, ld->ring_fd, to_submit, |
136 | min_complete, flags); | |
52885fa2 JA |
137 | } |
138 | ||
bffad86f | 139 | static int fio_ioring_prep(struct thread_data *td, struct io_u *io_u) |
52885fa2 | 140 | { |
bffad86f | 141 | struct ioring_data *ld = td->io_ops_data; |
cfcc8564 | 142 | struct ioring_options *o = td->eo; |
52885fa2 | 143 | struct fio_file *f = io_u->file; |
f0403f94 | 144 | struct io_uring_sqe *sqe; |
52885fa2 | 145 | |
f0403f94 JA |
146 | sqe = &ld->sqes[io_u->index]; |
147 | sqe->fd = f->fd; | |
148 | sqe->flags = 0; | |
149 | sqe->ioprio = 0; | |
2ea53ca3 | 150 | sqe->buf_index = 0; |
52885fa2 | 151 | |
e3970057 | 152 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { |
2ea53ca3 JA |
153 | if (io_u->ddir == DDIR_READ) |
154 | sqe->opcode = IORING_OP_READV; | |
155 | else | |
156 | sqe->opcode = IORING_OP_WRITEV; | |
157 | ||
f0403f94 | 158 | if (o->fixedbufs) { |
2ea53ca3 | 159 | sqe->flags |= IOSQE_FIXED_BUFFER; |
f0403f94 JA |
160 | sqe->addr = io_u->xfer_buf; |
161 | sqe->len = io_u->xfer_buflen; | |
2ea53ca3 | 162 | sqe->buf_index = io_u->index; |
cfcc8564 | 163 | } else { |
f0403f94 JA |
164 | sqe->addr = &ld->iovecs[io_u->index]; |
165 | sqe->len = 1; | |
cfcc8564 | 166 | } |
f0403f94 | 167 | sqe->off = io_u->offset; |
52885fa2 | 168 | } else if (ddir_sync(io_u->ddir)) |
f0403f94 | 169 | sqe->opcode = IORING_OP_FSYNC; |
52885fa2 | 170 | |
a7086591 | 171 | sqe->data = (unsigned long) io_u; |
52885fa2 JA |
172 | return 0; |
173 | } | |
174 | ||
bffad86f | 175 | static struct io_u *fio_ioring_event(struct thread_data *td, int event) |
52885fa2 | 176 | { |
bffad86f | 177 | struct ioring_data *ld = td->io_ops_data; |
f0403f94 | 178 | struct io_uring_cqe *cqe; |
52885fa2 | 179 | struct io_u *io_u; |
b87aa01a | 180 | unsigned index; |
52885fa2 | 181 | |
b87aa01a | 182 | index = (event + ld->cq_ring_off) & ld->cq_ring_mask; |
52885fa2 | 183 | |
f0403f94 | 184 | cqe = &ld->cq_ring.cqes[index]; |
a7086591 | 185 | io_u = (struct io_u *) cqe->data; |
52885fa2 | 186 | |
f0403f94 JA |
187 | if (cqe->res != io_u->xfer_buflen) { |
188 | if (cqe->res > io_u->xfer_buflen) | |
189 | io_u->error = -cqe->res; | |
52885fa2 | 190 | else |
f0403f94 | 191 | io_u->resid = io_u->xfer_buflen - cqe->res; |
52885fa2 JA |
192 | } else |
193 | io_u->error = 0; | |
194 | ||
96563db9 | 195 | if (io_u->ddir == DDIR_READ) { |
f0403f94 | 196 | if (cqe->flags & IOCQE_FLAG_CACHEHIT) |
96563db9 JA |
197 | ld->cachehit++; |
198 | else | |
199 | ld->cachemiss++; | |
200 | } | |
201 | ||
52885fa2 JA |
202 | return io_u; |
203 | } | |
204 | ||
bffad86f | 205 | static int fio_ioring_cqring_reap(struct thread_data *td, unsigned int events, |
52885fa2 JA |
206 | unsigned int max) |
207 | { | |
bffad86f JA |
208 | struct ioring_data *ld = td->io_ops_data; |
209 | struct io_cq_ring *ring = &ld->cq_ring; | |
e2239016 | 210 | unsigned head, reaped = 0; |
52885fa2 | 211 | |
9a2d78b3 | 212 | head = *ring->head; |
52885fa2 JA |
213 | do { |
214 | read_barrier(); | |
9a2d78b3 | 215 | if (head == *ring->tail) |
52885fa2 JA |
216 | break; |
217 | reaped++; | |
218 | head++; | |
52885fa2 JA |
219 | } while (reaped + events < max); |
220 | ||
9a2d78b3 | 221 | *ring->head = head; |
52885fa2 JA |
222 | write_barrier(); |
223 | return reaped; | |
224 | } | |
225 | ||
bffad86f JA |
226 | static int fio_ioring_getevents(struct thread_data *td, unsigned int min, |
227 | unsigned int max, const struct timespec *t) | |
52885fa2 | 228 | { |
bffad86f | 229 | struct ioring_data *ld = td->io_ops_data; |
52885fa2 | 230 | unsigned actual_min = td->o.iodepth_batch_complete_min == 0 ? 0 : min; |
bffad86f JA |
231 | struct ioring_options *o = td->eo; |
232 | struct io_cq_ring *ring = &ld->cq_ring; | |
b87aa01a JA |
233 | unsigned events = 0; |
234 | int r; | |
52885fa2 | 235 | |
9a2d78b3 | 236 | ld->cq_ring_off = *ring->head; |
52885fa2 | 237 | do { |
bffad86f | 238 | r = fio_ioring_cqring_reap(td, events, max); |
52885fa2 JA |
239 | if (r) { |
240 | events += r; | |
241 | continue; | |
242 | } | |
243 | ||
3d7d00a3 | 244 | if (!o->sqpoll_thread) { |
9a2d78b3 JA |
245 | r = io_uring_enter(ld, 0, actual_min, |
246 | IORING_ENTER_GETEVENTS); | |
771c9901 JA |
247 | if (r < 0) { |
248 | if (errno == EAGAIN) | |
249 | continue; | |
9a2d78b3 | 250 | td_verror(td, errno, "io_uring_enter"); |
771c9901 JA |
251 | break; |
252 | } | |
52885fa2 JA |
253 | } |
254 | } while (events < min); | |
255 | ||
256 | return r < 0 ? r : events; | |
257 | } | |
258 | ||
bffad86f JA |
259 | static enum fio_q_status fio_ioring_queue(struct thread_data *td, |
260 | struct io_u *io_u) | |
52885fa2 | 261 | { |
bffad86f JA |
262 | struct ioring_data *ld = td->io_ops_data; |
263 | struct io_sq_ring *ring = &ld->sq_ring; | |
52885fa2 JA |
264 | unsigned tail, next_tail; |
265 | ||
266 | fio_ro_check(td, io_u); | |
267 | ||
b87aa01a | 268 | if (ld->queued == ld->iodepth) |
52885fa2 JA |
269 | return FIO_Q_BUSY; |
270 | ||
52885fa2 JA |
271 | if (io_u->ddir == DDIR_TRIM) { |
272 | if (ld->queued) | |
273 | return FIO_Q_BUSY; | |
274 | ||
275 | do_io_u_trim(td, io_u); | |
276 | io_u_mark_submit(td, 1); | |
277 | io_u_mark_complete(td, 1); | |
278 | return FIO_Q_COMPLETED; | |
279 | } | |
280 | ||
9a2d78b3 | 281 | tail = *ring->tail; |
52885fa2 | 282 | next_tail = tail + 1; |
52885fa2 | 283 | read_barrier(); |
9a2d78b3 | 284 | if (next_tail == *ring->head) |
52885fa2 JA |
285 | return FIO_Q_BUSY; |
286 | ||
b87aa01a | 287 | ring->array[tail & ld->sq_ring_mask] = io_u->index; |
9a2d78b3 | 288 | *ring->tail = next_tail; |
52885fa2 JA |
289 | write_barrier(); |
290 | ||
291 | ld->queued++; | |
292 | return FIO_Q_QUEUED; | |
293 | } | |
294 | ||
bffad86f | 295 | static void fio_ioring_queued(struct thread_data *td, int start, int nr) |
52885fa2 | 296 | { |
bffad86f | 297 | struct ioring_data *ld = td->io_ops_data; |
52885fa2 JA |
298 | struct timespec now; |
299 | ||
300 | if (!fio_fill_issue_time(td)) | |
301 | return; | |
302 | ||
303 | fio_gettime(&now, NULL); | |
304 | ||
305 | while (nr--) { | |
bffad86f | 306 | struct io_sq_ring *ring = &ld->sq_ring; |
9a2d78b3 | 307 | int index = ring->array[start & ld->sq_ring_mask]; |
f8289afc | 308 | struct io_u *io_u = ld->io_u_index[index]; |
52885fa2 JA |
309 | |
310 | memcpy(&io_u->issue_time, &now, sizeof(now)); | |
311 | io_u_queued(td, io_u); | |
312 | ||
313 | start++; | |
52885fa2 JA |
314 | } |
315 | } | |
316 | ||
bffad86f | 317 | static int fio_ioring_commit(struct thread_data *td) |
52885fa2 | 318 | { |
bffad86f JA |
319 | struct ioring_data *ld = td->io_ops_data; |
320 | struct ioring_options *o = td->eo; | |
52885fa2 JA |
321 | int ret; |
322 | ||
323 | if (!ld->queued) | |
324 | return 0; | |
325 | ||
3d7d00a3 JA |
326 | /* |
327 | * Kernel side does submission. just need to check if the ring is | |
328 | * flagged as needing a kick, if so, call io_uring_enter(). This | |
329 | * only happens if we've been idle too long. | |
330 | */ | |
331 | if (o->sqpoll_thread) { | |
bffad86f | 332 | struct io_sq_ring *ring = &ld->sq_ring; |
4cdbc048 | 333 | |
2ea53ca3 | 334 | read_barrier(); |
9a2d78b3 JA |
335 | if (*ring->flags & IORING_SQ_NEED_WAKEUP) |
336 | io_uring_enter(ld, ld->queued, 0, 0); | |
771c9901 JA |
337 | ld->queued = 0; |
338 | return 0; | |
339 | } | |
340 | ||
52885fa2 | 341 | do { |
9a2d78b3 | 342 | unsigned start = *ld->sq_ring.head; |
52885fa2 JA |
343 | long nr = ld->queued; |
344 | ||
9a2d78b3 | 345 | ret = io_uring_enter(ld, nr, 0, IORING_ENTER_GETEVENTS); |
52885fa2 | 346 | if (ret > 0) { |
bffad86f | 347 | fio_ioring_queued(td, start, ret); |
52885fa2 JA |
348 | io_u_mark_submit(td, ret); |
349 | ||
350 | ld->queued -= ret; | |
351 | ret = 0; | |
a90cd050 JA |
352 | } else if (!ret) { |
353 | io_u_mark_submit(td, ret); | |
52885fa2 | 354 | continue; |
a90cd050 JA |
355 | } else { |
356 | if (errno == EAGAIN) { | |
bffad86f | 357 | ret = fio_ioring_cqring_reap(td, 0, ld->queued); |
a90cd050 JA |
358 | if (ret) |
359 | continue; | |
360 | /* Shouldn't happen */ | |
361 | usleep(1); | |
362 | continue; | |
52885fa2 | 363 | } |
9a2d78b3 | 364 | td_verror(td, errno, "io_uring_enter submit"); |
52885fa2 | 365 | break; |
a90cd050 | 366 | } |
52885fa2 JA |
367 | } while (ld->queued); |
368 | ||
369 | return ret; | |
370 | } | |
371 | ||
bffad86f | 372 | static void fio_ioring_unmap(struct ioring_data *ld) |
52885fa2 | 373 | { |
9a2d78b3 | 374 | int i; |
52885fa2 | 375 | |
9a2d78b3 JA |
376 | for (i = 0; i < ARRAY_SIZE(ld->mmap); i++) |
377 | munmap(ld->mmap[i].ptr, ld->mmap[i].len); | |
378 | close(ld->ring_fd); | |
b87aa01a JA |
379 | } |
380 | ||
bffad86f | 381 | static void fio_ioring_cleanup(struct thread_data *td) |
52885fa2 | 382 | { |
bffad86f | 383 | struct ioring_data *ld = td->io_ops_data; |
52885fa2 JA |
384 | |
385 | if (ld) { | |
96563db9 JA |
386 | td->ts.cachehit += ld->cachehit; |
387 | td->ts.cachemiss += ld->cachemiss; | |
388 | ||
52885fa2 | 389 | if (!(td->flags & TD_F_CHILD)) |
bffad86f | 390 | fio_ioring_unmap(ld); |
9a2d78b3 | 391 | |
52885fa2 JA |
392 | free(ld->io_u_index); |
393 | free(ld->io_us); | |
9a2d78b3 | 394 | free(ld->iovecs); |
52885fa2 JA |
395 | free(ld); |
396 | } | |
397 | } | |
398 | ||
bffad86f | 399 | static int fio_ioring_mmap(struct ioring_data *ld, struct io_uring_params *p) |
9a2d78b3 | 400 | { |
bffad86f JA |
401 | struct io_sq_ring *sring = &ld->sq_ring; |
402 | struct io_cq_ring *cring = &ld->cq_ring; | |
9a2d78b3 JA |
403 | void *ptr; |
404 | ||
e2239016 | 405 | ld->mmap[0].len = p->sq_off.array + p->sq_entries * sizeof(__u32); |
9a2d78b3 JA |
406 | ptr = mmap(0, ld->mmap[0].len, PROT_READ | PROT_WRITE, |
407 | MAP_SHARED | MAP_POPULATE, ld->ring_fd, | |
408 | IORING_OFF_SQ_RING); | |
409 | ld->mmap[0].ptr = ptr; | |
410 | sring->head = ptr + p->sq_off.head; | |
411 | sring->tail = ptr + p->sq_off.tail; | |
412 | sring->ring_mask = ptr + p->sq_off.ring_mask; | |
413 | sring->ring_entries = ptr + p->sq_off.ring_entries; | |
414 | sring->flags = ptr + p->sq_off.flags; | |
ac122fea | 415 | sring->array = ptr + p->sq_off.array; |
9a2d78b3 JA |
416 | ld->sq_ring_mask = *sring->ring_mask; |
417 | ||
f0403f94 JA |
418 | ld->mmap[1].len = p->sq_entries * sizeof(struct io_uring_sqe); |
419 | ld->sqes = mmap(0, ld->mmap[1].len, PROT_READ | PROT_WRITE, | |
9a2d78b3 | 420 | MAP_SHARED | MAP_POPULATE, ld->ring_fd, |
f0403f94 JA |
421 | IORING_OFF_SQES); |
422 | ld->mmap[1].ptr = ld->sqes; | |
9a2d78b3 | 423 | |
f0403f94 JA |
424 | ld->mmap[2].len = p->cq_off.cqes + |
425 | p->cq_entries * sizeof(struct io_uring_cqe); | |
9a2d78b3 JA |
426 | ptr = mmap(0, ld->mmap[2].len, PROT_READ | PROT_WRITE, |
427 | MAP_SHARED | MAP_POPULATE, ld->ring_fd, | |
428 | IORING_OFF_CQ_RING); | |
429 | ld->mmap[2].ptr = ptr; | |
430 | cring->head = ptr + p->cq_off.head; | |
431 | cring->tail = ptr + p->cq_off.tail; | |
432 | cring->ring_mask = ptr + p->cq_off.ring_mask; | |
433 | cring->ring_entries = ptr + p->cq_off.ring_entries; | |
f0403f94 | 434 | cring->cqes = ptr + p->cq_off.cqes; |
9a2d78b3 JA |
435 | ld->cq_ring_mask = *cring->ring_mask; |
436 | return 0; | |
437 | } | |
438 | ||
bffad86f | 439 | static int fio_ioring_queue_init(struct thread_data *td) |
52885fa2 | 440 | { |
bffad86f JA |
441 | struct ioring_data *ld = td->io_ops_data; |
442 | struct ioring_options *o = td->eo; | |
52885fa2 | 443 | int depth = td->o.iodepth; |
bffad86f | 444 | struct io_uring_params p; |
9a2d78b3 JA |
445 | int ret; |
446 | ||
447 | memset(&p, 0, sizeof(p)); | |
52885fa2 JA |
448 | |
449 | if (o->hipri) | |
bffad86f | 450 | p.flags |= IORING_SETUP_IOPOLL; |
3d7d00a3 JA |
451 | if (o->sqpoll_thread) { |
452 | p.flags |= IORING_SETUP_SQPOLL; | |
453 | if (o->sqpoll_set) { | |
454 | p.flags |= IORING_SETUP_SQ_AFF; | |
455 | p.sq_thread_cpu = o->sqpoll_cpu; | |
456 | } | |
f635f1fb | 457 | } |
a90cd050 | 458 | |
52885fa2 JA |
459 | if (o->fixedbufs) { |
460 | struct rlimit rlim = { | |
461 | .rlim_cur = RLIM_INFINITY, | |
462 | .rlim_max = RLIM_INFINITY, | |
463 | }; | |
464 | ||
465 | setrlimit(RLIMIT_MEMLOCK, &rlim); | |
52885fa2 JA |
466 | } |
467 | ||
2ea53ca3 | 468 | ret = syscall(__NR_sys_io_uring_setup, depth, &p); |
9a2d78b3 JA |
469 | if (ret < 0) |
470 | return ret; | |
471 | ||
472 | ld->ring_fd = ret; | |
2ea53ca3 JA |
473 | |
474 | if (o->fixedbufs) { | |
475 | struct io_uring_register_buffers reg = { | |
476 | .iovecs = ld->iovecs, | |
477 | .nr_iovecs = depth | |
478 | }; | |
479 | ||
480 | ret = syscall(__NR_sys_io_uring_register, ld->ring_fd, | |
481 | IORING_REGISTER_BUFFERS, ®); | |
482 | if (ret < 0) | |
483 | return ret; | |
484 | } | |
485 | ||
bffad86f | 486 | return fio_ioring_mmap(ld, &p); |
52885fa2 JA |
487 | } |
488 | ||
bffad86f | 489 | static int fio_ioring_post_init(struct thread_data *td) |
52885fa2 | 490 | { |
bffad86f | 491 | struct ioring_data *ld = td->io_ops_data; |
52885fa2 | 492 | struct io_u *io_u; |
650346e1 | 493 | int err, i; |
52885fa2 | 494 | |
650346e1 JA |
495 | for (i = 0; i < td->o.iodepth; i++) { |
496 | struct iovec *iov = &ld->iovecs[i]; | |
9a2d78b3 | 497 | |
650346e1 JA |
498 | io_u = ld->io_u_index[i]; |
499 | iov->iov_base = io_u->buf; | |
500 | iov->iov_len = td_max_bs(td); | |
52885fa2 JA |
501 | } |
502 | ||
bffad86f | 503 | err = fio_ioring_queue_init(td); |
52885fa2 | 504 | if (err) { |
d63a472d | 505 | td_verror(td, errno, "io_queue_init"); |
52885fa2 JA |
506 | return 1; |
507 | } | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
9a2d78b3 JA |
512 | static unsigned roundup_pow2(unsigned depth) |
513 | { | |
514 | return 1UL << __fls(depth - 1); | |
515 | } | |
516 | ||
bffad86f | 517 | static int fio_ioring_init(struct thread_data *td) |
52885fa2 | 518 | { |
bffad86f | 519 | struct ioring_data *ld; |
52885fa2 | 520 | |
52885fa2 JA |
521 | ld = calloc(1, sizeof(*ld)); |
522 | ||
b87aa01a JA |
523 | /* ring depth must be a power-of-2 */ |
524 | ld->iodepth = td->o.iodepth; | |
525 | td->o.iodepth = roundup_pow2(td->o.iodepth); | |
526 | ||
52885fa2 JA |
527 | /* io_u index */ |
528 | ld->io_u_index = calloc(td->o.iodepth, sizeof(struct io_u *)); | |
529 | ld->io_us = calloc(td->o.iodepth, sizeof(struct io_u *)); | |
650346e1 | 530 | ld->iovecs = calloc(td->o.iodepth, sizeof(struct iovec)); |
52885fa2 JA |
531 | |
532 | td->io_ops_data = ld; | |
533 | return 0; | |
534 | } | |
535 | ||
bffad86f | 536 | static int fio_ioring_io_u_init(struct thread_data *td, struct io_u *io_u) |
52885fa2 | 537 | { |
bffad86f | 538 | struct ioring_data *ld = td->io_ops_data; |
52885fa2 JA |
539 | |
540 | ld->io_u_index[io_u->index] = io_u; | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static struct ioengine_ops ioengine = { | |
bffad86f | 545 | .name = "io_uring", |
52885fa2 | 546 | .version = FIO_IOOPS_VERSION, |
bffad86f JA |
547 | .init = fio_ioring_init, |
548 | .post_init = fio_ioring_post_init, | |
549 | .io_u_init = fio_ioring_io_u_init, | |
550 | .prep = fio_ioring_prep, | |
551 | .queue = fio_ioring_queue, | |
552 | .commit = fio_ioring_commit, | |
553 | .getevents = fio_ioring_getevents, | |
554 | .event = fio_ioring_event, | |
555 | .cleanup = fio_ioring_cleanup, | |
52885fa2 JA |
556 | .open_file = generic_open_file, |
557 | .close_file = generic_close_file, | |
558 | .get_file_size = generic_get_file_size, | |
559 | .options = options, | |
bffad86f | 560 | .option_struct_size = sizeof(struct ioring_options), |
52885fa2 JA |
561 | }; |
562 | ||
bffad86f | 563 | static void fio_init fio_ioring_register(void) |
52885fa2 | 564 | { |
52885fa2 | 565 | register_ioengine(&ioengine); |
52885fa2 JA |
566 | } |
567 | ||
bffad86f | 568 | static void fio_exit fio_ioring_unregister(void) |
52885fa2 | 569 | { |
52885fa2 | 570 | unregister_ioengine(&ioengine); |
52885fa2 | 571 | } |
1f90e9bb | 572 | #endif |