Commit | Line | Data |
---|---|---|
52885fa2 JA |
1 | /* |
2 | * aioring engine | |
3 | * | |
a90cd050 JA |
4 | * IO engine using the new native Linux libaio ring interface. See: |
5 | * | |
6 | * http://git.kernel.dk/cgit/linux-block/log/?h=aio-poll | |
52885fa2 JA |
7 | * |
8 | */ | |
9 | #include <stdlib.h> | |
10 | #include <unistd.h> | |
11 | #include <errno.h> | |
12 | #include <libaio.h> | |
13 | #include <sys/time.h> | |
14 | #include <sys/resource.h> | |
15 | ||
16 | #include "../fio.h" | |
17 | #include "../lib/pow2.h" | |
18 | #include "../optgroup.h" | |
19 | #include "../lib/memalign.h" | |
b87aa01a | 20 | #include "../lib/fls.h" |
52885fa2 | 21 | |
a30e63cf JA |
22 | #ifdef ARCH_HAVE_AIORING |
23 | ||
52885fa2 | 24 | /* |
9a2d78b3 | 25 | * io_uring_setup(2) flags |
52885fa2 | 26 | */ |
52885fa2 | 27 | #ifndef IOCTX_FLAG_SCQRING |
9a2d78b3 JA |
28 | #define IOCTX_FLAG_SCQRING (1 << 0) |
29 | #endif | |
30 | #ifndef IOCTX_FLAG_IOPOLL | |
31 | #define IOCTX_FLAG_IOPOLL (1 << 1) | |
52885fa2 JA |
32 | #endif |
33 | #ifndef IOCTX_FLAG_FIXEDBUFS | |
34 | #define IOCTX_FLAG_FIXEDBUFS (1 << 2) | |
35 | #endif | |
36 | #ifndef IOCTX_FLAG_SQTHREAD | |
37 | #define IOCTX_FLAG_SQTHREAD (1 << 3) | |
38 | #endif | |
39 | #ifndef IOCTX_FLAG_SQWQ | |
40 | #define IOCTX_FLAG_SQWQ (1 << 4) | |
41 | #endif | |
771c9901 JA |
42 | #ifndef IOCTX_FLAG_SQPOLL |
43 | #define IOCTX_FLAG_SQPOLL (1 << 5) | |
44 | #endif | |
45 | ||
9a2d78b3 JA |
46 | #define IORING_OFF_SQ_RING 0ULL |
47 | #define IORING_OFF_CQ_RING 0x8000000ULL | |
48 | #define IORING_OFF_IOCB 0x10000000ULL | |
52885fa2 JA |
49 | |
50 | /* | |
9a2d78b3 | 51 | * io_uring_enter(2) flags |
52885fa2 | 52 | */ |
9a2d78b3 JA |
53 | #ifndef IORING_ENTER_GETEVENTS |
54 | #define IORING_ENTER_GETEVENTS (1 << 0) | |
52885fa2 JA |
55 | #endif |
56 | ||
57 | typedef uint64_t u64; | |
58 | typedef uint32_t u32; | |
59 | typedef uint16_t u16; | |
60 | ||
4cdbc048 JA |
61 | #define IORING_SQ_NEED_WAKEUP (1 << 0) |
62 | ||
96563db9 JA |
63 | #define IOEV_RES2_CACHEHIT (1 << 0) |
64 | ||
9a2d78b3 JA |
65 | struct aio_uring_offsets { |
66 | u32 head; | |
67 | u32 tail; | |
68 | u32 ring_mask; | |
69 | u32 ring_entries; | |
70 | u32 flags; | |
71 | u32 elems; | |
72 | }; | |
73 | ||
74 | struct aio_uring_params { | |
75 | u32 sq_entries; | |
76 | u32 cq_entries; | |
77 | u32 flags; | |
78 | u16 sq_thread_cpu; | |
79 | u16 resv[9]; | |
80 | struct aio_uring_offsets sq_off; | |
81 | struct aio_uring_offsets cq_off; | |
82 | }; | |
83 | ||
52885fa2 | 84 | struct aio_sq_ring { |
9a2d78b3 JA |
85 | u32 *head; |
86 | u32 *tail; | |
87 | u32 *ring_mask; | |
88 | u32 *ring_entries; | |
89 | u32 *flags; | |
90 | u32 *array; | |
52885fa2 JA |
91 | }; |
92 | ||
93 | struct aio_cq_ring { | |
9a2d78b3 JA |
94 | u32 *head; |
95 | u32 *tail; | |
96 | u32 *ring_mask; | |
97 | u32 *ring_entries; | |
98 | struct io_event *events; | |
99 | }; | |
100 | ||
101 | struct aioring_mmap { | |
102 | void *ptr; | |
103 | size_t len; | |
52885fa2 JA |
104 | }; |
105 | ||
106 | struct aioring_data { | |
9a2d78b3 JA |
107 | int ring_fd; |
108 | ||
52885fa2 JA |
109 | struct io_u **io_us; |
110 | struct io_u **io_u_index; | |
111 | ||
9a2d78b3 | 112 | struct aio_sq_ring sq_ring; |
52885fa2 | 113 | struct iocb *iocbs; |
9a2d78b3 | 114 | struct iovec *iovecs; |
b87aa01a | 115 | unsigned sq_ring_mask; |
52885fa2 | 116 | |
9a2d78b3 | 117 | struct aio_cq_ring cq_ring; |
52885fa2 | 118 | struct io_event *events; |
b87aa01a | 119 | unsigned cq_ring_mask; |
52885fa2 JA |
120 | |
121 | int queued; | |
122 | int cq_ring_off; | |
b87aa01a | 123 | unsigned iodepth; |
96563db9 JA |
124 | |
125 | uint64_t cachehit; | |
126 | uint64_t cachemiss; | |
9a2d78b3 JA |
127 | |
128 | struct aioring_mmap mmap[3]; | |
52885fa2 JA |
129 | }; |
130 | ||
131 | struct aioring_options { | |
132 | void *pad; | |
133 | unsigned int hipri; | |
134 | unsigned int fixedbufs; | |
a90cd050 JA |
135 | unsigned int sqthread; |
136 | unsigned int sqthread_set; | |
771c9901 | 137 | unsigned int sqthread_poll; |
a90cd050 | 138 | unsigned int sqwq; |
52885fa2 JA |
139 | }; |
140 | ||
a90cd050 JA |
141 | static int fio_aioring_sqthread_cb(void *data, |
142 | unsigned long long *val) | |
143 | { | |
144 | struct aioring_options *o = data; | |
145 | ||
146 | o->sqthread = *val; | |
147 | o->sqthread_set = 1; | |
148 | return 0; | |
149 | } | |
150 | ||
52885fa2 JA |
151 | static struct fio_option options[] = { |
152 | { | |
153 | .name = "hipri", | |
154 | .lname = "High Priority", | |
155 | .type = FIO_OPT_STR_SET, | |
156 | .off1 = offsetof(struct aioring_options, hipri), | |
157 | .help = "Use polled IO completions", | |
158 | .category = FIO_OPT_C_ENGINE, | |
159 | .group = FIO_OPT_G_LIBAIO, | |
160 | }, | |
161 | { | |
162 | .name = "fixedbufs", | |
163 | .lname = "Fixed (pre-mapped) IO buffers", | |
164 | .type = FIO_OPT_STR_SET, | |
165 | .off1 = offsetof(struct aioring_options, fixedbufs), | |
166 | .help = "Pre map IO buffers", | |
167 | .category = FIO_OPT_C_ENGINE, | |
168 | .group = FIO_OPT_G_LIBAIO, | |
169 | }, | |
a90cd050 JA |
170 | { |
171 | .name = "sqthread", | |
172 | .lname = "Use kernel SQ thread on this CPU", | |
173 | .type = FIO_OPT_INT, | |
174 | .cb = fio_aioring_sqthread_cb, | |
175 | .help = "Offload submission to kernel thread", | |
176 | .category = FIO_OPT_C_ENGINE, | |
177 | .group = FIO_OPT_G_LIBAIO, | |
178 | }, | |
771c9901 JA |
179 | { |
180 | .name = "sqthread_poll", | |
181 | .lname = "Kernel SQ thread should poll", | |
182 | .type = FIO_OPT_STR_SET, | |
183 | .off1 = offsetof(struct aioring_options, sqthread_poll), | |
184 | .help = "Used with sqthread, enables kernel side polling", | |
185 | .category = FIO_OPT_C_ENGINE, | |
186 | .group = FIO_OPT_G_LIBAIO, | |
187 | }, | |
a90cd050 JA |
188 | { |
189 | .name = "sqwq", | |
190 | .lname = "Offload submission to kernel workqueue", | |
191 | .type = FIO_OPT_STR_SET, | |
192 | .off1 = offsetof(struct aioring_options, sqwq), | |
193 | .help = "Offload submission to kernel workqueue", | |
194 | .category = FIO_OPT_C_ENGINE, | |
195 | .group = FIO_OPT_G_LIBAIO, | |
196 | }, | |
52885fa2 JA |
197 | { |
198 | .name = NULL, | |
199 | }, | |
200 | }; | |
201 | ||
9a2d78b3 | 202 | static int io_uring_enter(struct aioring_data *ld, unsigned int to_submit, |
52885fa2 JA |
203 | unsigned int min_complete, unsigned int flags) |
204 | { | |
9a2d78b3 JA |
205 | return syscall(__NR_sys_io_uring_enter, ld->ring_fd, to_submit, |
206 | min_complete, flags); | |
52885fa2 JA |
207 | } |
208 | ||
209 | static int fio_aioring_prep(struct thread_data *td, struct io_u *io_u) | |
210 | { | |
211 | struct aioring_data *ld = td->io_ops_data; | |
212 | struct fio_file *f = io_u->file; | |
52885fa2 JA |
213 | struct iocb *iocb; |
214 | ||
215 | iocb = &ld->iocbs[io_u->index]; | |
216 | ||
e3970057 JA |
217 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { |
218 | if (io_u->ddir == DDIR_READ) | |
52885fa2 | 219 | iocb->aio_lio_opcode = IO_CMD_PREAD; |
e3970057 | 220 | else |
52885fa2 | 221 | iocb->aio_lio_opcode = IO_CMD_PWRITE; |
e3970057 JA |
222 | iocb->aio_reqprio = 0; |
223 | iocb->aio_fildes = f->fd; | |
224 | iocb->u.c.buf = io_u->xfer_buf; | |
225 | iocb->u.c.nbytes = io_u->xfer_buflen; | |
226 | iocb->u.c.offset = io_u->offset; | |
ac4f3d4e | 227 | iocb->u.c.flags = 0; |
52885fa2 JA |
228 | } else if (ddir_sync(io_u->ddir)) |
229 | io_prep_fsync(iocb, f->fd); | |
230 | ||
231 | iocb->data = io_u; | |
232 | return 0; | |
233 | } | |
234 | ||
235 | static struct io_u *fio_aioring_event(struct thread_data *td, int event) | |
236 | { | |
237 | struct aioring_data *ld = td->io_ops_data; | |
238 | struct io_event *ev; | |
239 | struct io_u *io_u; | |
b87aa01a | 240 | unsigned index; |
52885fa2 | 241 | |
b87aa01a | 242 | index = (event + ld->cq_ring_off) & ld->cq_ring_mask; |
52885fa2 | 243 | |
9a2d78b3 | 244 | ev = &ld->cq_ring.events[index]; |
52885fa2 JA |
245 | io_u = ev->data; |
246 | ||
247 | if (ev->res != io_u->xfer_buflen) { | |
248 | if (ev->res > io_u->xfer_buflen) | |
249 | io_u->error = -ev->res; | |
250 | else | |
251 | io_u->resid = io_u->xfer_buflen - ev->res; | |
252 | } else | |
253 | io_u->error = 0; | |
254 | ||
96563db9 JA |
255 | if (io_u->ddir == DDIR_READ) { |
256 | if (ev->res2 & IOEV_RES2_CACHEHIT) | |
257 | ld->cachehit++; | |
258 | else | |
259 | ld->cachemiss++; | |
260 | } | |
261 | ||
52885fa2 JA |
262 | return io_u; |
263 | } | |
264 | ||
265 | static int fio_aioring_cqring_reap(struct thread_data *td, unsigned int events, | |
266 | unsigned int max) | |
267 | { | |
268 | struct aioring_data *ld = td->io_ops_data; | |
9a2d78b3 | 269 | struct aio_cq_ring *ring = &ld->cq_ring; |
52885fa2 JA |
270 | u32 head, reaped = 0; |
271 | ||
9a2d78b3 | 272 | head = *ring->head; |
52885fa2 JA |
273 | do { |
274 | read_barrier(); | |
9a2d78b3 | 275 | if (head == *ring->tail) |
52885fa2 JA |
276 | break; |
277 | reaped++; | |
278 | head++; | |
52885fa2 JA |
279 | } while (reaped + events < max); |
280 | ||
9a2d78b3 | 281 | *ring->head = head; |
52885fa2 JA |
282 | write_barrier(); |
283 | return reaped; | |
284 | } | |
285 | ||
286 | static int fio_aioring_getevents(struct thread_data *td, unsigned int min, | |
287 | unsigned int max, const struct timespec *t) | |
288 | { | |
289 | struct aioring_data *ld = td->io_ops_data; | |
290 | unsigned actual_min = td->o.iodepth_batch_complete_min == 0 ? 0 : min; | |
771c9901 | 291 | struct aioring_options *o = td->eo; |
9a2d78b3 | 292 | struct aio_cq_ring *ring = &ld->cq_ring; |
b87aa01a JA |
293 | unsigned events = 0; |
294 | int r; | |
52885fa2 | 295 | |
9a2d78b3 | 296 | ld->cq_ring_off = *ring->head; |
52885fa2 JA |
297 | do { |
298 | r = fio_aioring_cqring_reap(td, events, max); | |
299 | if (r) { | |
300 | events += r; | |
301 | continue; | |
302 | } | |
303 | ||
771c9901 | 304 | if (!o->sqthread_poll) { |
9a2d78b3 JA |
305 | r = io_uring_enter(ld, 0, actual_min, |
306 | IORING_ENTER_GETEVENTS); | |
771c9901 JA |
307 | if (r < 0) { |
308 | if (errno == EAGAIN) | |
309 | continue; | |
9a2d78b3 | 310 | td_verror(td, errno, "io_uring_enter"); |
771c9901 JA |
311 | break; |
312 | } | |
52885fa2 JA |
313 | } |
314 | } while (events < min); | |
315 | ||
316 | return r < 0 ? r : events; | |
317 | } | |
318 | ||
319 | static enum fio_q_status fio_aioring_queue(struct thread_data *td, | |
320 | struct io_u *io_u) | |
321 | { | |
322 | struct aioring_data *ld = td->io_ops_data; | |
9a2d78b3 | 323 | struct aio_sq_ring *ring = &ld->sq_ring; |
52885fa2 JA |
324 | unsigned tail, next_tail; |
325 | ||
326 | fio_ro_check(td, io_u); | |
327 | ||
b87aa01a | 328 | if (ld->queued == ld->iodepth) |
52885fa2 JA |
329 | return FIO_Q_BUSY; |
330 | ||
52885fa2 JA |
331 | if (io_u->ddir == DDIR_TRIM) { |
332 | if (ld->queued) | |
333 | return FIO_Q_BUSY; | |
334 | ||
335 | do_io_u_trim(td, io_u); | |
336 | io_u_mark_submit(td, 1); | |
337 | io_u_mark_complete(td, 1); | |
338 | return FIO_Q_COMPLETED; | |
339 | } | |
340 | ||
9a2d78b3 | 341 | tail = *ring->tail; |
52885fa2 | 342 | next_tail = tail + 1; |
52885fa2 | 343 | read_barrier(); |
9a2d78b3 | 344 | if (next_tail == *ring->head) |
52885fa2 JA |
345 | return FIO_Q_BUSY; |
346 | ||
b87aa01a | 347 | ring->array[tail & ld->sq_ring_mask] = io_u->index; |
9a2d78b3 | 348 | *ring->tail = next_tail; |
52885fa2 JA |
349 | write_barrier(); |
350 | ||
351 | ld->queued++; | |
352 | return FIO_Q_QUEUED; | |
353 | } | |
354 | ||
355 | static void fio_aioring_queued(struct thread_data *td, int start, int nr) | |
356 | { | |
357 | struct aioring_data *ld = td->io_ops_data; | |
358 | struct timespec now; | |
359 | ||
360 | if (!fio_fill_issue_time(td)) | |
361 | return; | |
362 | ||
363 | fio_gettime(&now, NULL); | |
364 | ||
365 | while (nr--) { | |
9a2d78b3 JA |
366 | struct aio_sq_ring *ring = &ld->sq_ring; |
367 | int index = ring->array[start & ld->sq_ring_mask]; | |
f8289afc | 368 | struct io_u *io_u = ld->io_u_index[index]; |
52885fa2 JA |
369 | |
370 | memcpy(&io_u->issue_time, &now, sizeof(now)); | |
371 | io_u_queued(td, io_u); | |
372 | ||
373 | start++; | |
52885fa2 JA |
374 | } |
375 | } | |
376 | ||
377 | static int fio_aioring_commit(struct thread_data *td) | |
378 | { | |
379 | struct aioring_data *ld = td->io_ops_data; | |
771c9901 | 380 | struct aioring_options *o = td->eo; |
52885fa2 JA |
381 | int ret; |
382 | ||
383 | if (!ld->queued) | |
384 | return 0; | |
385 | ||
771c9901 JA |
386 | /* Nothing to do */ |
387 | if (o->sqthread_poll) { | |
9a2d78b3 | 388 | struct aio_sq_ring *ring = &ld->sq_ring; |
4cdbc048 | 389 | |
9a2d78b3 JA |
390 | if (*ring->flags & IORING_SQ_NEED_WAKEUP) |
391 | io_uring_enter(ld, ld->queued, 0, 0); | |
771c9901 JA |
392 | ld->queued = 0; |
393 | return 0; | |
394 | } | |
395 | ||
52885fa2 | 396 | do { |
9a2d78b3 | 397 | unsigned start = *ld->sq_ring.head; |
52885fa2 JA |
398 | long nr = ld->queued; |
399 | ||
9a2d78b3 | 400 | ret = io_uring_enter(ld, nr, 0, IORING_ENTER_GETEVENTS); |
52885fa2 JA |
401 | if (ret > 0) { |
402 | fio_aioring_queued(td, start, ret); | |
403 | io_u_mark_submit(td, ret); | |
404 | ||
405 | ld->queued -= ret; | |
406 | ret = 0; | |
a90cd050 JA |
407 | } else if (!ret) { |
408 | io_u_mark_submit(td, ret); | |
52885fa2 | 409 | continue; |
a90cd050 JA |
410 | } else { |
411 | if (errno == EAGAIN) { | |
412 | ret = fio_aioring_cqring_reap(td, 0, ld->queued); | |
413 | if (ret) | |
414 | continue; | |
415 | /* Shouldn't happen */ | |
416 | usleep(1); | |
417 | continue; | |
52885fa2 | 418 | } |
9a2d78b3 | 419 | td_verror(td, errno, "io_uring_enter submit"); |
52885fa2 | 420 | break; |
a90cd050 | 421 | } |
52885fa2 JA |
422 | } while (ld->queued); |
423 | ||
424 | return ret; | |
425 | } | |
426 | ||
9a2d78b3 | 427 | static void fio_aioring_unmap(struct aioring_data *ld) |
52885fa2 | 428 | { |
9a2d78b3 | 429 | int i; |
52885fa2 | 430 | |
9a2d78b3 JA |
431 | for (i = 0; i < ARRAY_SIZE(ld->mmap); i++) |
432 | munmap(ld->mmap[i].ptr, ld->mmap[i].len); | |
433 | close(ld->ring_fd); | |
b87aa01a JA |
434 | } |
435 | ||
52885fa2 JA |
436 | static void fio_aioring_cleanup(struct thread_data *td) |
437 | { | |
438 | struct aioring_data *ld = td->io_ops_data; | |
439 | ||
440 | if (ld) { | |
96563db9 JA |
441 | td->ts.cachehit += ld->cachehit; |
442 | td->ts.cachemiss += ld->cachemiss; | |
443 | ||
52885fa2 JA |
444 | /* |
445 | * Work-around to avoid huge RCU stalls at exit time. If we | |
446 | * don't do this here, then it'll be torn down by exit_aio(). | |
447 | * But for that case we can parallellize the freeing, thus | |
448 | * speeding it up a lot. | |
449 | */ | |
450 | if (!(td->flags & TD_F_CHILD)) | |
9a2d78b3 JA |
451 | fio_aioring_unmap(ld); |
452 | ||
52885fa2 JA |
453 | free(ld->io_u_index); |
454 | free(ld->io_us); | |
9a2d78b3 | 455 | free(ld->iovecs); |
52885fa2 JA |
456 | free(ld); |
457 | } | |
458 | } | |
459 | ||
9a2d78b3 JA |
460 | static int fio_aioring_mmap(struct aioring_data *ld, struct aio_uring_params *p) |
461 | { | |
462 | struct aio_sq_ring *sring = &ld->sq_ring; | |
463 | struct aio_cq_ring *cring = &ld->cq_ring; | |
464 | void *ptr; | |
465 | ||
466 | ld->mmap[0].len = p->sq_off.elems + p->sq_entries * sizeof(u32); | |
467 | ptr = mmap(0, ld->mmap[0].len, PROT_READ | PROT_WRITE, | |
468 | MAP_SHARED | MAP_POPULATE, ld->ring_fd, | |
469 | IORING_OFF_SQ_RING); | |
470 | ld->mmap[0].ptr = ptr; | |
471 | sring->head = ptr + p->sq_off.head; | |
472 | sring->tail = ptr + p->sq_off.tail; | |
473 | sring->ring_mask = ptr + p->sq_off.ring_mask; | |
474 | sring->ring_entries = ptr + p->sq_off.ring_entries; | |
475 | sring->flags = ptr + p->sq_off.flags; | |
476 | sring->array = ptr + p->sq_off.elems; | |
477 | ld->sq_ring_mask = *sring->ring_mask; | |
478 | ||
479 | ld->mmap[1].len = p->sq_entries * sizeof(struct iocb); | |
480 | ld->iocbs = mmap(0, ld->mmap[1].len, PROT_READ | PROT_WRITE, | |
481 | MAP_SHARED | MAP_POPULATE, ld->ring_fd, | |
482 | IORING_OFF_IOCB); | |
483 | ld->mmap[1].ptr = ld->iocbs; | |
484 | ||
485 | ld->mmap[2].len = p->cq_off.elems + | |
486 | p->cq_entries * sizeof(struct io_event); | |
487 | ptr = mmap(0, ld->mmap[2].len, PROT_READ | PROT_WRITE, | |
488 | MAP_SHARED | MAP_POPULATE, ld->ring_fd, | |
489 | IORING_OFF_CQ_RING); | |
490 | ld->mmap[2].ptr = ptr; | |
491 | cring->head = ptr + p->cq_off.head; | |
492 | cring->tail = ptr + p->cq_off.tail; | |
493 | cring->ring_mask = ptr + p->cq_off.ring_mask; | |
494 | cring->ring_entries = ptr + p->cq_off.ring_entries; | |
495 | cring->events = ptr + p->cq_off.elems; | |
496 | ld->cq_ring_mask = *cring->ring_mask; | |
497 | return 0; | |
498 | } | |
499 | ||
52885fa2 JA |
500 | static int fio_aioring_queue_init(struct thread_data *td) |
501 | { | |
52885fa2 JA |
502 | struct aioring_data *ld = td->io_ops_data; |
503 | struct aioring_options *o = td->eo; | |
52885fa2 | 504 | int depth = td->o.iodepth; |
9a2d78b3 JA |
505 | struct aio_uring_params p; |
506 | int ret; | |
507 | ||
508 | memset(&p, 0, sizeof(p)); | |
509 | p.flags = IOCTX_FLAG_SCQRING; | |
52885fa2 JA |
510 | |
511 | if (o->hipri) | |
9a2d78b3 | 512 | p.flags |= IOCTX_FLAG_IOPOLL; |
a90cd050 | 513 | if (o->sqthread_set) { |
9a2d78b3 JA |
514 | p.sq_thread_cpu = o->sqthread; |
515 | p.flags |= IOCTX_FLAG_SQTHREAD; | |
771c9901 | 516 | if (o->sqthread_poll) |
9a2d78b3 | 517 | p.flags |= IOCTX_FLAG_SQPOLL; |
f635f1fb JA |
518 | } |
519 | if (o->sqwq) | |
9a2d78b3 | 520 | p.flags |= IOCTX_FLAG_SQWQ; |
a90cd050 | 521 | |
52885fa2 JA |
522 | if (o->fixedbufs) { |
523 | struct rlimit rlim = { | |
524 | .rlim_cur = RLIM_INFINITY, | |
525 | .rlim_max = RLIM_INFINITY, | |
526 | }; | |
527 | ||
528 | setrlimit(RLIMIT_MEMLOCK, &rlim); | |
9a2d78b3 | 529 | p.flags |= IOCTX_FLAG_FIXEDBUFS; |
52885fa2 JA |
530 | } |
531 | ||
9a2d78b3 JA |
532 | ret = syscall(__NR_sys_io_uring_setup, depth, ld->iovecs, &p); |
533 | if (ret < 0) | |
534 | return ret; | |
535 | ||
536 | ld->ring_fd = ret; | |
537 | return fio_aioring_mmap(ld, &p); | |
52885fa2 JA |
538 | } |
539 | ||
540 | static int fio_aioring_post_init(struct thread_data *td) | |
541 | { | |
542 | struct aioring_data *ld = td->io_ops_data; | |
543 | struct aioring_options *o = td->eo; | |
544 | struct io_u *io_u; | |
9a2d78b3 | 545 | int err; |
52885fa2 JA |
546 | |
547 | if (o->fixedbufs) { | |
548 | int i; | |
549 | ||
550 | for (i = 0; i < td->o.iodepth; i++) { | |
9a2d78b3 JA |
551 | struct iovec *iov = &ld->iovecs[i]; |
552 | ||
52885fa2 | 553 | io_u = ld->io_u_index[i]; |
9a2d78b3 JA |
554 | iov->iov_base = io_u->buf; |
555 | iov->iov_len = td_max_bs(td); | |
52885fa2 JA |
556 | } |
557 | } | |
558 | ||
559 | err = fio_aioring_queue_init(td); | |
560 | if (err) { | |
d63a472d | 561 | td_verror(td, errno, "io_queue_init"); |
52885fa2 JA |
562 | return 1; |
563 | } | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
9a2d78b3 JA |
568 | static unsigned roundup_pow2(unsigned depth) |
569 | { | |
570 | return 1UL << __fls(depth - 1); | |
571 | } | |
572 | ||
52885fa2 JA |
573 | static int fio_aioring_init(struct thread_data *td) |
574 | { | |
575 | struct aioring_data *ld; | |
576 | ||
52885fa2 JA |
577 | ld = calloc(1, sizeof(*ld)); |
578 | ||
b87aa01a JA |
579 | /* ring depth must be a power-of-2 */ |
580 | ld->iodepth = td->o.iodepth; | |
581 | td->o.iodepth = roundup_pow2(td->o.iodepth); | |
582 | ||
52885fa2 JA |
583 | /* io_u index */ |
584 | ld->io_u_index = calloc(td->o.iodepth, sizeof(struct io_u *)); | |
585 | ld->io_us = calloc(td->o.iodepth, sizeof(struct io_u *)); | |
586 | ||
9a2d78b3 | 587 | ld->iovecs = calloc(td->o.iodepth, sizeof(struct iovec)); |
52885fa2 JA |
588 | |
589 | td->io_ops_data = ld; | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static int fio_aioring_io_u_init(struct thread_data *td, struct io_u *io_u) | |
594 | { | |
595 | struct aioring_data *ld = td->io_ops_data; | |
596 | ||
597 | ld->io_u_index[io_u->index] = io_u; | |
598 | return 0; | |
599 | } | |
600 | ||
601 | static struct ioengine_ops ioengine = { | |
602 | .name = "aio-ring", | |
603 | .version = FIO_IOOPS_VERSION, | |
604 | .init = fio_aioring_init, | |
605 | .post_init = fio_aioring_post_init, | |
606 | .io_u_init = fio_aioring_io_u_init, | |
607 | .prep = fio_aioring_prep, | |
608 | .queue = fio_aioring_queue, | |
609 | .commit = fio_aioring_commit, | |
610 | .getevents = fio_aioring_getevents, | |
611 | .event = fio_aioring_event, | |
612 | .cleanup = fio_aioring_cleanup, | |
613 | .open_file = generic_open_file, | |
614 | .close_file = generic_close_file, | |
615 | .get_file_size = generic_get_file_size, | |
616 | .options = options, | |
617 | .option_struct_size = sizeof(struct aioring_options), | |
618 | }; | |
619 | ||
620 | static void fio_init fio_aioring_register(void) | |
621 | { | |
52885fa2 | 622 | register_ioengine(&ioengine); |
52885fa2 JA |
623 | } |
624 | ||
625 | static void fio_exit fio_aioring_unregister(void) | |
626 | { | |
52885fa2 | 627 | unregister_ioengine(&ioengine); |
52885fa2 | 628 | } |
1f90e9bb | 629 | #endif |