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a40e7a59 GB |
1 | /* |
2 | * FIO engines for DDN's Infinite Memory Engine. | |
3 | * This file defines 3 engines: ime_psync, ime_psyncv, and ime_aio | |
4 | * | |
5 | * Copyright (C) 2018 DataDirect Networks. All rights reserved. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License, | |
9 | * version 2 as published by the Free Software Foundation.. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Some details about the new engines are given below: | |
19 | * | |
20 | * | |
21 | * ime_psync: | |
22 | * Most basic engine that issues calls to ime_native whenever an IO is queued. | |
23 | * | |
24 | * ime_psyncv: | |
25 | * This engine tries to queue the IOs (by creating iovecs) if asked by FIO (via | |
26 | * iodepth_batch). It refuses to queue when the iovecs can't be appended, and | |
27 | * waits for FIO to issue a commit. After a call to commit and get_events, new | |
28 | * IOs can be queued. | |
29 | * | |
30 | * ime_aio: | |
31 | * This engine tries to queue the IOs (by creating iovecs) if asked by FIO (via | |
32 | * iodepth_batch). When the iovecs can't be appended to the current request, a | |
33 | * new request for IME is created. These requests will be issued to IME when | |
34 | * commit is called. Contrary to ime_psyncv, there can be several requests at | |
35 | * once. We don't need to wait for a request to terminate before creating a new | |
36 | * one. | |
37 | */ | |
38 | ||
39 | #include <stdio.h> | |
40 | #include <stdlib.h> | |
41 | #include <errno.h> | |
42 | #include <linux/limits.h> | |
43 | #include <ime_native.h> | |
44 | ||
45 | #include "../fio.h" | |
46 | ||
47 | ||
48 | /************************************************************** | |
49 | * Types and constants definitions | |
50 | * | |
51 | **************************************************************/ | |
52 | ||
53 | /* define constants for async IOs */ | |
54 | #define FIO_IME_IN_PROGRESS -1 | |
55 | #define FIO_IME_REQ_ERROR -2 | |
56 | ||
57 | /* This flag is used when some jobs were created using threads. In that | |
58 | case, IME can't be finalized in the engine-specific cleanup function, | |
59 | because other threads might still use IME. Instead, IME is finalized | |
60 | in the destructor (see fio_ime_unregister), only when the flag | |
61 | fio_ime_is_initialized is true (which means at least one thread has | |
62 | initialized IME). */ | |
63 | static bool fio_ime_is_initialized = false; | |
64 | ||
65 | struct imesio_req { | |
66 | int fd; /* File descriptor */ | |
67 | enum fio_ddir ddir; /* Type of IO (read or write) */ | |
68 | off_t offset; /* File offset */ | |
69 | }; | |
70 | struct imeaio_req { | |
71 | struct ime_aiocb iocb; /* IME aio request */ | |
72 | ssize_t status; /* Status of the IME request */ | |
73 | enum fio_ddir ddir; /* Type of IO (read or write) */ | |
74 | pthread_cond_t cond_endio; /* Condition var to notify FIO */ | |
75 | pthread_mutex_t status_mutex; /* Mutex for cond_endio */ | |
76 | }; | |
77 | ||
78 | /* This structure will be used for 2 engines: ime_psyncv and ime_aio */ | |
79 | struct ime_data { | |
80 | union { | |
81 | struct imeaio_req *aioreqs; /* array of aio requests */ | |
82 | struct imesio_req *sioreq; /* pointer to the only syncio request */ | |
83 | }; | |
84 | struct iovec *iovecs; /* array of queued iovecs */ | |
85 | struct io_u **io_us; /* array of queued io_u pointers */ | |
86 | struct io_u **event_io_us; /* array of the events retieved afer get_events*/ | |
87 | unsigned int queued; /* iovecs/io_us in the queue */ | |
88 | unsigned int events; /* number of committed iovecs/io_us */ | |
89 | ||
90 | /* variables used to implement a "ring" queue */ | |
91 | unsigned int depth; /* max entries in the queue */ | |
92 | unsigned int head; /* index used to append */ | |
93 | unsigned int tail; /* index used to pop */ | |
94 | unsigned int cur_commit; /* index of the first uncommitted req */ | |
95 | ||
96 | /* offset used by the last iovec (used to check if the iovecs can be appended)*/ | |
97 | unsigned long long last_offset; | |
98 | ||
99 | /* The variables below are used for aio only */ | |
100 | struct imeaio_req *last_req; /* last request awaiting committing */ | |
101 | }; | |
102 | ||
103 | ||
104 | /************************************************************** | |
105 | * Private functions for queueing/unqueueing | |
106 | * | |
107 | **************************************************************/ | |
108 | ||
109 | static void fio_ime_queue_incr (struct ime_data *ime_d) | |
110 | { | |
111 | ime_d->head = (ime_d->head + 1) % ime_d->depth; | |
112 | ime_d->queued++; | |
113 | } | |
38c1392e | 114 | |
a40e7a59 GB |
115 | static void fio_ime_queue_red (struct ime_data *ime_d) |
116 | { | |
117 | ime_d->tail = (ime_d->tail + 1) % ime_d->depth; | |
118 | ime_d->queued--; | |
119 | ime_d->events--; | |
120 | } | |
38c1392e | 121 | |
a40e7a59 GB |
122 | static void fio_ime_queue_commit (struct ime_data *ime_d, int iovcnt) |
123 | { | |
124 | ime_d->cur_commit = (ime_d->cur_commit + iovcnt) % ime_d->depth; | |
125 | ime_d->events += iovcnt; | |
126 | } | |
38c1392e | 127 | |
a40e7a59 GB |
128 | static void fio_ime_queue_reset (struct ime_data *ime_d) |
129 | { | |
130 | ime_d->head = 0; | |
131 | ime_d->tail = 0; | |
132 | ime_d->cur_commit = 0; | |
133 | ime_d->queued = 0; | |
134 | ime_d->events = 0; | |
135 | } | |
136 | ||
a40e7a59 GB |
137 | /************************************************************** |
138 | * General IME functions | |
139 | * (needed for both sync and async IOs) | |
140 | **************************************************************/ | |
141 | ||
142 | static char *fio_set_ime_filename(char* filename) | |
143 | { | |
144 | static __thread char ime_filename[PATH_MAX]; | |
38c1392e JA |
145 | int ret; |
146 | ||
147 | ret = snprintf(ime_filename, PATH_MAX, "%s%s", DEFAULT_IME_FILE_PREFIX, filename); | |
148 | if (ret < PATH_MAX) | |
a40e7a59 | 149 | return ime_filename; |
38c1392e JA |
150 | |
151 | return NULL; | |
a40e7a59 GB |
152 | } |
153 | ||
154 | static int fio_ime_get_file_size(struct thread_data *td, struct fio_file *f) | |
155 | { | |
156 | struct stat buf; | |
157 | int ret; | |
158 | char *ime_filename; | |
159 | ||
160 | dprint(FD_FILE, "get file size %s\n", f->file_name); | |
161 | ||
162 | ime_filename = fio_set_ime_filename(f->file_name); | |
163 | if (ime_filename == NULL) | |
164 | return 1; | |
165 | ret = ime_native_stat(ime_filename, &buf); | |
166 | if (ret == -1) { | |
167 | td_verror(td, errno, "fstat"); | |
168 | return 1; | |
169 | } | |
170 | ||
171 | f->real_file_size = buf.st_size; | |
172 | return 0; | |
173 | } | |
174 | ||
175 | /* This functions mimics the generic_file_open function, but issues | |
176 | IME native calls instead of POSIX calls. */ | |
177 | static int fio_ime_open_file(struct thread_data *td, struct fio_file *f) | |
178 | { | |
179 | int flags = 0; | |
180 | int ret; | |
181 | uint64_t desired_fs; | |
182 | char *ime_filename; | |
183 | ||
184 | dprint(FD_FILE, "fd open %s\n", f->file_name); | |
185 | ||
186 | if (td_trim(td)) { | |
187 | td_verror(td, EINVAL, "IME does not support TRIM operation"); | |
188 | return 1; | |
189 | } | |
190 | ||
191 | if (td->o.oatomic) { | |
192 | td_verror(td, EINVAL, "IME does not support atomic IO"); | |
193 | return 1; | |
194 | } | |
195 | if (td->o.odirect) | |
196 | flags |= O_DIRECT; | |
197 | if (td->o.sync_io) | |
198 | flags |= O_SYNC; | |
199 | if (td->o.create_on_open && td->o.allow_create) | |
200 | flags |= O_CREAT; | |
201 | ||
202 | if (td_write(td)) { | |
203 | if (!read_only) | |
204 | flags |= O_RDWR; | |
205 | ||
206 | if (td->o.allow_create) | |
207 | flags |= O_CREAT; | |
38c1392e | 208 | } else if (td_read(td)) { |
a40e7a59 | 209 | flags |= O_RDONLY; |
38c1392e | 210 | } else { |
a40e7a59 GB |
211 | /* We should never go here. */ |
212 | td_verror(td, EINVAL, "Unsopported open mode"); | |
213 | return 1; | |
214 | } | |
215 | ||
216 | ime_filename = fio_set_ime_filename(f->file_name); | |
217 | if (ime_filename == NULL) | |
218 | return 1; | |
219 | f->fd = ime_native_open(ime_filename, flags, 0600); | |
220 | if (f->fd == -1) { | |
221 | char buf[FIO_VERROR_SIZE]; | |
222 | int __e = errno; | |
223 | ||
224 | snprintf(buf, sizeof(buf), "open(%s)", f->file_name); | |
225 | td_verror(td, __e, buf); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | /* Now we need to make sure the real file size is sufficient for FIO | |
230 | to do its things. This is normally done before the file open function | |
231 | is called, but because FIO would use POSIX calls, we need to do it | |
232 | ourselves */ | |
233 | ret = fio_ime_get_file_size(td, f); | |
234 | if (ret < 0) { | |
235 | ime_native_close(f->fd); | |
236 | td_verror(td, errno, "ime_get_file_size"); | |
237 | return 1; | |
238 | } | |
239 | ||
240 | desired_fs = f->io_size + f->file_offset; | |
241 | if (td_write(td)) { | |
242 | dprint(FD_FILE, "Laying out file %s%s\n", | |
243 | DEFAULT_IME_FILE_PREFIX, f->file_name); | |
244 | if (!td->o.create_on_open && | |
245 | f->real_file_size < desired_fs && | |
246 | ime_native_ftruncate(f->fd, desired_fs) < 0) { | |
247 | ime_native_close(f->fd); | |
248 | td_verror(td, errno, "ime_native_ftruncate"); | |
249 | return 1; | |
250 | } | |
251 | if (f->real_file_size < desired_fs) | |
252 | f->real_file_size = desired_fs; | |
38c1392e | 253 | } else if (td_read(td) && f->real_file_size < desired_fs) { |
a40e7a59 GB |
254 | ime_native_close(f->fd); |
255 | log_err("error: can't read %lu bytes from file with " | |
256 | "%lu bytes\n", desired_fs, f->real_file_size); | |
257 | return 1; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | static int fio_ime_close_file(struct thread_data fio_unused *td, struct fio_file *f) | |
264 | { | |
265 | int ret = 0; | |
266 | ||
267 | dprint(FD_FILE, "fd close %s\n", f->file_name); | |
268 | ||
269 | if (ime_native_close(f->fd) < 0) | |
270 | ret = errno; | |
271 | ||
272 | f->fd = -1; | |
273 | return ret; | |
274 | } | |
275 | ||
276 | static int fio_ime_unlink_file(struct thread_data *td, struct fio_file *f) | |
277 | { | |
38c1392e | 278 | char *ime_filename = fio_set_ime_filename(f->file_name); |
a40e7a59 GB |
279 | int ret; |
280 | ||
a40e7a59 GB |
281 | if (ime_filename == NULL) |
282 | return 1; | |
a40e7a59 | 283 | |
38c1392e | 284 | ret = unlink(ime_filename); |
a40e7a59 GB |
285 | return ret < 0 ? errno : 0; |
286 | } | |
287 | ||
288 | static struct io_u *fio_ime_event(struct thread_data *td, int event) | |
289 | { | |
290 | struct ime_data *ime_d = td->io_ops_data; | |
38c1392e | 291 | |
a40e7a59 GB |
292 | return ime_d->event_io_us[event]; |
293 | } | |
294 | ||
295 | /* Setup file used to replace get_file_sizes when settin up the file. | |
296 | Instead we will set real_file_sie to 0 for each file. This way we | |
297 | can avoid calling ime_native_init before the forks are created. */ | |
298 | static int fio_ime_setup(struct thread_data *td) | |
299 | { | |
300 | struct fio_file *f; | |
301 | unsigned int i; | |
302 | ||
303 | for_each_file(td, f, i) { | |
304 | dprint(FD_FILE, "setup: set file size to 0 for %p/%d/%s\n", | |
305 | f, i, f->file_name); | |
306 | f->real_file_size = 0; | |
307 | } | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static int fio_ime_engine_init(struct thread_data *td) | |
313 | { | |
314 | struct fio_file *f; | |
315 | unsigned int i; | |
316 | ||
317 | dprint(FD_IO, "ime engine init\n"); | |
318 | if (fio_ime_is_initialized && !td->o.use_thread) { | |
319 | log_err("Warning: something might go wrong. Not all threads/forks were" | |
320 | " created before the FIO jobs were initialized.\n"); | |
321 | } | |
322 | ||
323 | ime_native_init(); | |
324 | fio_ime_is_initialized = true; | |
325 | ||
326 | /* We have to temporarily set real_file_size so that | |
327 | FIO can initialize properly. It will be corrected | |
328 | on file open. */ | |
329 | for_each_file(td, f, i) | |
330 | f->real_file_size = f->io_size + f->file_offset; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static void fio_ime_engine_finalize(struct thread_data *td) | |
336 | { | |
337 | /* Only finalize IME when using forks */ | |
338 | if (!td->o.use_thread) { | |
339 | if (ime_native_finalize() < 0) | |
340 | log_err("error in ime_native_finalize\n"); | |
341 | fio_ime_is_initialized = false; | |
342 | } | |
343 | } | |
344 | ||
345 | ||
346 | /************************************************************** | |
347 | * Private functions for blocking IOs | |
348 | * (without iovecs) | |
349 | **************************************************************/ | |
350 | ||
351 | /* Notice: this function comes from the sync engine */ | |
352 | /* It is used by the commit function to return a proper code and fill | |
353 | some attributes in the io_u used for the IO. */ | |
354 | static int fio_ime_psync_end(struct thread_data *td, struct io_u *io_u, ssize_t ret) | |
355 | { | |
356 | if (ret != (ssize_t) io_u->xfer_buflen) { | |
357 | if (ret >= 0) { | |
358 | io_u->resid = io_u->xfer_buflen - ret; | |
359 | io_u->error = 0; | |
360 | return FIO_Q_COMPLETED; | |
361 | } else | |
362 | io_u->error = errno; | |
363 | } | |
364 | ||
365 | if (io_u->error) { | |
366 | io_u_log_error(td, io_u); | |
367 | td_verror(td, io_u->error, "xfer"); | |
368 | } | |
369 | ||
370 | return FIO_Q_COMPLETED; | |
371 | } | |
372 | ||
373 | static enum fio_q_status fio_ime_psync_queue(struct thread_data *td, | |
374 | struct io_u *io_u) | |
375 | { | |
376 | struct fio_file *f = io_u->file; | |
377 | ssize_t ret; | |
378 | ||
379 | fio_ro_check(td, io_u); | |
380 | ||
381 | if (io_u->ddir == DDIR_READ) | |
382 | ret = ime_native_pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); | |
383 | else if (io_u->ddir == DDIR_WRITE) | |
384 | ret = ime_native_pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset); | |
385 | else if (io_u->ddir == DDIR_SYNC) | |
386 | ret = ime_native_fsync(f->fd); | |
387 | else { | |
388 | ret = io_u->xfer_buflen; | |
389 | io_u->error = EINVAL; | |
390 | } | |
391 | ||
392 | return fio_ime_psync_end(td, io_u, ret); | |
393 | } | |
394 | ||
395 | ||
396 | /************************************************************** | |
397 | * Private functions for blocking IOs | |
398 | * (with iovecs) | |
399 | **************************************************************/ | |
400 | ||
401 | static bool fio_ime_psyncv_can_queue(struct ime_data *ime_d, struct io_u *io_u) | |
402 | { | |
403 | /* We can only queue if: | |
404 | - There are no queued iovecs | |
405 | - Or if there is at least one: | |
406 | - There must be no event waiting for retrieval | |
407 | - The offsets must be contiguous | |
408 | - The ddir and fd must be the same */ | |
409 | return (ime_d->queued == 0 || ( | |
410 | ime_d->events == 0 && | |
411 | ime_d->last_offset == io_u->offset && | |
412 | ime_d->sioreq->ddir == io_u->ddir && | |
413 | ime_d->sioreq->fd == io_u->file->fd)); | |
414 | } | |
415 | ||
416 | /* Before using this function, we should have already | |
417 | ensured that the queue is not full */ | |
418 | static void fio_ime_psyncv_enqueue(struct ime_data *ime_d, struct io_u *io_u) | |
419 | { | |
420 | struct imesio_req *ioreq = ime_d->sioreq; | |
421 | struct iovec *iov = &ime_d->iovecs[ime_d->head]; | |
422 | ||
423 | iov->iov_base = io_u->xfer_buf; | |
424 | iov->iov_len = io_u->xfer_buflen; | |
425 | ||
426 | if (ime_d->queued == 0) { | |
427 | ioreq->offset = io_u->offset; | |
428 | ioreq->ddir = io_u->ddir; | |
429 | ioreq->fd = io_u->file->fd; | |
430 | } | |
431 | ||
432 | ime_d->io_us[ime_d->head] = io_u; | |
433 | ime_d->last_offset = io_u->offset + io_u->xfer_buflen; | |
434 | fio_ime_queue_incr(ime_d); | |
435 | } | |
436 | ||
437 | /* Tries to queue an IO. It will fail if the IO can't be appended to the | |
438 | current request or if the current request has been committed but not | |
439 | yet retrieved by get_events. */ | |
440 | static enum fio_q_status fio_ime_psyncv_queue(struct thread_data *td, | |
441 | struct io_u *io_u) | |
442 | { | |
443 | struct ime_data *ime_d = td->io_ops_data; | |
444 | ||
445 | fio_ro_check(td, io_u); | |
446 | ||
447 | if (ime_d->queued == ime_d->depth) | |
448 | return FIO_Q_BUSY; | |
449 | ||
450 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { | |
451 | if (!fio_ime_psyncv_can_queue(ime_d, io_u)) | |
452 | return FIO_Q_BUSY; | |
453 | ||
454 | dprint(FD_IO, "queue: ddir=%d at %u commit=%u queued=%u events=%u\n", | |
455 | io_u->ddir, ime_d->head, ime_d->cur_commit, | |
456 | ime_d->queued, ime_d->events); | |
457 | fio_ime_psyncv_enqueue(ime_d, io_u); | |
458 | return FIO_Q_QUEUED; | |
38c1392e | 459 | } else if (io_u->ddir == DDIR_SYNC) { |
a40e7a59 GB |
460 | if (ime_native_fsync(io_u->file->fd) < 0) { |
461 | io_u->error = errno; | |
462 | td_verror(td, io_u->error, "fsync"); | |
463 | } | |
464 | return FIO_Q_COMPLETED; | |
465 | } else { | |
466 | io_u->error = EINVAL; | |
467 | td_verror(td, io_u->error, "wrong ddir"); | |
468 | return FIO_Q_COMPLETED; | |
469 | } | |
470 | } | |
471 | ||
472 | /* Notice: this function comes from the sync engine */ | |
473 | /* It is used by the commit function to return a proper code and fill | |
474 | some attributes in the io_us appended to the current request. */ | |
475 | static int fio_ime_psyncv_end(struct thread_data *td, ssize_t bytes) | |
476 | { | |
477 | struct ime_data *ime_d = td->io_ops_data; | |
478 | struct io_u *io_u; | |
479 | unsigned int i; | |
480 | int err = errno; | |
481 | ||
482 | for (i = 0; i < ime_d->queued; i++) { | |
483 | io_u = ime_d->io_us[i]; | |
484 | ||
485 | if (bytes == -1) | |
486 | io_u->error = err; | |
487 | else { | |
488 | unsigned int this_io; | |
489 | ||
490 | this_io = bytes; | |
491 | if (this_io > io_u->xfer_buflen) | |
492 | this_io = io_u->xfer_buflen; | |
493 | ||
494 | io_u->resid = io_u->xfer_buflen - this_io; | |
495 | io_u->error = 0; | |
496 | bytes -= this_io; | |
497 | } | |
498 | } | |
499 | ||
500 | if (bytes == -1) { | |
501 | td_verror(td, err, "xfer psyncv"); | |
502 | return -err; | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | /* Commits the current request by calling ime_native (with one or several | |
509 | iovecs). After this commit, the corresponding events (one per iovec) | |
510 | can be retrieved by get_events. */ | |
511 | static int fio_ime_psyncv_commit(struct thread_data *td) | |
512 | { | |
513 | struct ime_data *ime_d = td->io_ops_data; | |
514 | struct imesio_req *ioreq; | |
515 | int ret = 0; | |
516 | ||
517 | /* Exit if there are no (new) events to commit | |
518 | or if the previous committed event haven't been retrieved */ | |
519 | if (!ime_d->queued || ime_d->events) | |
520 | return 0; | |
521 | ||
522 | ioreq = ime_d->sioreq; | |
523 | ime_d->events = ime_d->queued; | |
524 | if (ioreq->ddir == DDIR_READ) | |
525 | ret = ime_native_preadv(ioreq->fd, ime_d->iovecs, ime_d->queued, ioreq->offset); | |
526 | else | |
527 | ret = ime_native_pwritev(ioreq->fd, ime_d->iovecs, ime_d->queued, ioreq->offset); | |
528 | ||
529 | dprint(FD_IO, "committed %d iovecs\n", ime_d->queued); | |
530 | ||
531 | return fio_ime_psyncv_end(td, ret); | |
532 | } | |
533 | ||
534 | static int fio_ime_psyncv_getevents(struct thread_data *td, unsigned int min, | |
535 | unsigned int max, const struct timespec *t) | |
536 | { | |
537 | struct ime_data *ime_d = td->io_ops_data; | |
538 | struct io_u *io_u; | |
539 | int events = 0; | |
540 | unsigned int count; | |
541 | ||
542 | if (ime_d->events) { | |
543 | for (count = 0; count < ime_d->events; count++) { | |
544 | io_u = ime_d->io_us[count]; | |
545 | ime_d->event_io_us[events] = io_u; | |
546 | events++; | |
547 | } | |
548 | fio_ime_queue_reset(ime_d); | |
549 | } | |
550 | ||
551 | dprint(FD_IO, "getevents(%u,%u) ret=%d queued=%u events=%u\n", | |
552 | min, max, events, ime_d->queued, ime_d->events); | |
553 | return events; | |
554 | } | |
555 | ||
556 | static int fio_ime_psyncv_init(struct thread_data *td) | |
557 | { | |
558 | struct ime_data *ime_d; | |
559 | ||
560 | if (fio_ime_engine_init(td) < 0) | |
561 | return 1; | |
562 | ||
563 | ime_d = calloc(1, sizeof(*ime_d)); | |
564 | ||
565 | ime_d->sioreq = malloc(sizeof(struct imesio_req)); | |
566 | ime_d->iovecs = malloc(td->o.iodepth * sizeof(struct iovec)); | |
567 | ime_d->io_us = malloc(2 * td->o.iodepth * sizeof(struct io_u *)); | |
568 | ime_d->event_io_us = ime_d->io_us + td->o.iodepth; | |
569 | ||
570 | ime_d->depth = td->o.iodepth; | |
571 | ||
572 | td->io_ops_data = ime_d; | |
573 | return 0; | |
574 | } | |
575 | ||
576 | static void fio_ime_psyncv_clean(struct thread_data *td) | |
577 | { | |
578 | struct ime_data *ime_d = td->io_ops_data; | |
579 | ||
580 | if (ime_d) { | |
581 | free(ime_d->sioreq); | |
582 | free(ime_d->iovecs); | |
583 | free(ime_d->io_us); | |
584 | free(ime_d); | |
585 | td->io_ops_data = NULL; | |
586 | } | |
587 | ||
588 | fio_ime_engine_finalize(td); | |
589 | } | |
590 | ||
591 | ||
592 | /************************************************************** | |
593 | * Private functions for non-blocking IOs | |
594 | * | |
595 | **************************************************************/ | |
596 | ||
597 | void fio_ime_aio_complete_cb (struct ime_aiocb *aiocb, int err, | |
598 | ssize_t bytes) | |
599 | { | |
600 | struct imeaio_req *ioreq = (struct imeaio_req *) aiocb->user_context; | |
601 | ||
602 | pthread_mutex_lock(&ioreq->status_mutex); | |
603 | ioreq->status = err == 0 ? bytes : FIO_IME_REQ_ERROR; | |
604 | pthread_mutex_unlock(&ioreq->status_mutex); | |
605 | ||
606 | pthread_cond_signal(&ioreq->cond_endio); | |
607 | } | |
608 | ||
609 | static bool fio_ime_aio_can_queue (struct ime_data *ime_d, struct io_u *io_u) | |
610 | { | |
611 | /* So far we can queue in any case. */ | |
612 | return true; | |
613 | } | |
614 | static bool fio_ime_aio_can_append (struct ime_data *ime_d, struct io_u *io_u) | |
615 | { | |
616 | /* We can only append if: | |
617 | - The iovecs will be contiguous in the array | |
618 | - There is already a queued iovec | |
619 | - The offsets are contiguous | |
620 | - The ddir and fs are the same */ | |
621 | return (ime_d->head != 0 && | |
622 | ime_d->queued - ime_d->events > 0 && | |
623 | ime_d->last_offset == io_u->offset && | |
624 | ime_d->last_req->ddir == io_u->ddir && | |
625 | ime_d->last_req->iocb.fd == io_u->file->fd); | |
626 | } | |
627 | ||
628 | /* Before using this function, we should have already | |
629 | ensured that the queue is not full */ | |
630 | static void fio_ime_aio_enqueue(struct ime_data *ime_d, struct io_u *io_u) | |
631 | { | |
632 | struct imeaio_req *ioreq = &ime_d->aioreqs[ime_d->head]; | |
633 | struct ime_aiocb *iocb = &ioreq->iocb; | |
634 | struct iovec *iov = &ime_d->iovecs[ime_d->head]; | |
635 | ||
636 | iov->iov_base = io_u->xfer_buf; | |
637 | iov->iov_len = io_u->xfer_buflen; | |
638 | ||
639 | if (fio_ime_aio_can_append(ime_d, io_u)) | |
640 | ime_d->last_req->iocb.iovcnt++; | |
641 | else { | |
642 | ioreq->status = FIO_IME_IN_PROGRESS; | |
643 | ioreq->ddir = io_u->ddir; | |
644 | ime_d->last_req = ioreq; | |
645 | ||
646 | iocb->complete_cb = &fio_ime_aio_complete_cb; | |
647 | iocb->fd = io_u->file->fd; | |
648 | iocb->file_offset = io_u->offset; | |
649 | iocb->iov = iov; | |
650 | iocb->iovcnt = 1; | |
651 | iocb->flags = 0; | |
652 | iocb->user_context = (intptr_t) ioreq; | |
653 | } | |
654 | ||
655 | ime_d->io_us[ime_d->head] = io_u; | |
656 | ime_d->last_offset = io_u->offset + io_u->xfer_buflen; | |
657 | fio_ime_queue_incr(ime_d); | |
658 | } | |
659 | ||
660 | /* Tries to queue an IO. It will create a new request if the IO can't be | |
661 | appended to the current request. It will fail if the queue can't contain | |
662 | any more io_u/iovec. In this case, commit and then get_events need to be | |
663 | called. */ | |
664 | static enum fio_q_status fio_ime_aio_queue(struct thread_data *td, | |
665 | struct io_u *io_u) | |
666 | { | |
667 | struct ime_data *ime_d = td->io_ops_data; | |
668 | ||
669 | fio_ro_check(td, io_u); | |
670 | ||
671 | dprint(FD_IO, "queue: ddir=%d at %u commit=%u queued=%u events=%u\n", | |
672 | io_u->ddir, ime_d->head, ime_d->cur_commit, | |
673 | ime_d->queued, ime_d->events); | |
674 | ||
675 | if (ime_d->queued == ime_d->depth) | |
676 | return FIO_Q_BUSY; | |
677 | ||
678 | if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) { | |
679 | if (!fio_ime_aio_can_queue(ime_d, io_u)) | |
680 | return FIO_Q_BUSY; | |
681 | ||
682 | fio_ime_aio_enqueue(ime_d, io_u); | |
683 | return FIO_Q_QUEUED; | |
38c1392e | 684 | } else if (io_u->ddir == DDIR_SYNC) { |
a40e7a59 GB |
685 | if (ime_native_fsync(io_u->file->fd) < 0) { |
686 | io_u->error = errno; | |
687 | td_verror(td, io_u->error, "fsync"); | |
688 | } | |
689 | return FIO_Q_COMPLETED; | |
690 | } else { | |
691 | io_u->error = EINVAL; | |
692 | td_verror(td, io_u->error, "wrong ddir"); | |
693 | return FIO_Q_COMPLETED; | |
694 | } | |
695 | } | |
696 | ||
697 | static int fio_ime_aio_commit(struct thread_data *td) | |
698 | { | |
699 | struct ime_data *ime_d = td->io_ops_data; | |
700 | struct imeaio_req *ioreq; | |
701 | int ret = 0; | |
702 | ||
703 | /* Loop while there are events to commit */ | |
704 | while (ime_d->queued - ime_d->events) { | |
705 | ioreq = &ime_d->aioreqs[ime_d->cur_commit]; | |
706 | if (ioreq->ddir == DDIR_READ) | |
707 | ret = ime_native_aio_read(&ioreq->iocb); | |
708 | else | |
709 | ret = ime_native_aio_write(&ioreq->iocb); | |
710 | ||
711 | fio_ime_queue_commit(ime_d, ioreq->iocb.iovcnt); | |
712 | ||
713 | /* fio needs a negative error code */ | |
714 | if (ret < 0) { | |
715 | ioreq->status = FIO_IME_REQ_ERROR; | |
716 | return -errno; | |
717 | } | |
718 | ||
719 | io_u_mark_submit(td, ioreq->iocb.iovcnt); | |
720 | dprint(FD_IO, "committed %d iovecs commit=%u queued=%u events=%u\n", | |
721 | ioreq->iocb.iovcnt, ime_d->cur_commit, | |
722 | ime_d->queued, ime_d->events); | |
723 | } | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | static int fio_ime_aio_getevents(struct thread_data *td, unsigned int min, | |
729 | unsigned int max, const struct timespec *t) | |
730 | { | |
731 | struct ime_data *ime_d = td->io_ops_data; | |
732 | struct imeaio_req *ioreq; | |
733 | struct io_u *io_u; | |
734 | int events = 0; | |
735 | unsigned int count; | |
736 | ssize_t bytes; | |
737 | ||
738 | while (ime_d->events) { | |
739 | ioreq = &ime_d->aioreqs[ime_d->tail]; | |
740 | ||
741 | /* Break if we already got events, and if we will | |
742 | exceed max if we append the next events */ | |
743 | if (events && events + ioreq->iocb.iovcnt > max) | |
744 | break; | |
745 | ||
746 | if (ioreq->status != FIO_IME_IN_PROGRESS) { | |
747 | ||
748 | bytes = ioreq->status; | |
749 | for (count = 0; count < ioreq->iocb.iovcnt; count++) { | |
750 | io_u = ime_d->io_us[ime_d->tail]; | |
751 | ime_d->event_io_us[events] = io_u; | |
752 | events++; | |
753 | fio_ime_queue_red(ime_d); | |
754 | ||
755 | if (ioreq->status == FIO_IME_REQ_ERROR) | |
756 | io_u->error = EIO; | |
757 | else { | |
758 | io_u->resid = bytes > io_u->xfer_buflen ? | |
759 | 0 : io_u->xfer_buflen - bytes; | |
760 | io_u->error = 0; | |
761 | bytes -= io_u->xfer_buflen - io_u->resid; | |
762 | } | |
763 | } | |
764 | } else { | |
765 | pthread_mutex_lock(&ioreq->status_mutex); | |
38c1392e | 766 | while (ioreq->status == FIO_IME_IN_PROGRESS) |
a40e7a59 | 767 | pthread_cond_wait(&ioreq->cond_endio, &ioreq->status_mutex); |
a40e7a59 GB |
768 | pthread_mutex_unlock(&ioreq->status_mutex); |
769 | } | |
770 | ||
771 | } | |
772 | ||
773 | dprint(FD_IO, "getevents(%u,%u) ret=%d queued=%u events=%u\n", min, max, | |
774 | events, ime_d->queued, ime_d->events); | |
775 | return events; | |
776 | } | |
777 | ||
778 | static int fio_ime_aio_init(struct thread_data *td) | |
779 | { | |
780 | struct ime_data *ime_d; | |
781 | struct imeaio_req *ioreq; | |
782 | unsigned int i; | |
783 | ||
784 | if (fio_ime_engine_init(td) < 0) | |
785 | return 1; | |
786 | ||
787 | ime_d = calloc(1, sizeof(*ime_d)); | |
788 | ||
789 | ime_d->aioreqs = malloc(td->o.iodepth * sizeof(struct imeaio_req)); | |
790 | ime_d->iovecs = malloc(td->o.iodepth * sizeof(struct iovec)); | |
791 | ime_d->io_us = malloc(2 * td->o.iodepth * sizeof(struct io_u *)); | |
792 | ime_d->event_io_us = ime_d->io_us + td->o.iodepth; | |
793 | ||
794 | ime_d->depth = td->o.iodepth; | |
795 | for (i = 0; i < ime_d->depth; i++) { | |
796 | ioreq = &ime_d->aioreqs[i]; | |
797 | pthread_cond_init(&ioreq->cond_endio, NULL); | |
798 | pthread_mutex_init(&ioreq->status_mutex, NULL); | |
799 | } | |
800 | ||
801 | td->io_ops_data = ime_d; | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static void fio_ime_aio_clean(struct thread_data *td) | |
806 | { | |
807 | struct ime_data *ime_d = td->io_ops_data; | |
808 | struct imeaio_req *ioreq; | |
809 | unsigned int i; | |
810 | ||
811 | if (ime_d) { | |
812 | for (i = 0; i < ime_d->depth; i++) { | |
813 | ioreq = &ime_d->aioreqs[i]; | |
814 | pthread_cond_destroy(&ioreq->cond_endio); | |
815 | pthread_mutex_destroy(&ioreq->status_mutex); | |
816 | } | |
817 | free(ime_d->aioreqs); | |
818 | free(ime_d->iovecs); | |
819 | free(ime_d->io_us); | |
820 | free(ime_d); | |
821 | td->io_ops_data = NULL; | |
822 | } | |
823 | ||
824 | fio_ime_engine_finalize(td); | |
825 | } | |
826 | ||
827 | ||
828 | /************************************************************** | |
829 | * IO engines definitions | |
830 | * | |
831 | **************************************************************/ | |
832 | ||
833 | /* The FIO_DISKLESSIO flag used for these engines is necessary to prevent | |
834 | FIO from using POSIX calls. See fio_ime_open_file for more details. */ | |
835 | ||
836 | static struct ioengine_ops ioengine_prw = { | |
837 | .name = "ime_psync", | |
838 | .version = FIO_IOOPS_VERSION, | |
839 | .setup = fio_ime_setup, | |
840 | .init = fio_ime_engine_init, | |
841 | .cleanup = fio_ime_engine_finalize, | |
842 | .queue = fio_ime_psync_queue, | |
843 | .open_file = fio_ime_open_file, | |
844 | .close_file = fio_ime_close_file, | |
845 | .get_file_size = fio_ime_get_file_size, | |
846 | .unlink_file = fio_ime_unlink_file, | |
847 | .flags = FIO_SYNCIO | FIO_DISKLESSIO, | |
848 | }; | |
849 | ||
850 | static struct ioengine_ops ioengine_pvrw = { | |
851 | .name = "ime_psyncv", | |
852 | .version = FIO_IOOPS_VERSION, | |
853 | .setup = fio_ime_setup, | |
854 | .init = fio_ime_psyncv_init, | |
855 | .cleanup = fio_ime_psyncv_clean, | |
856 | .queue = fio_ime_psyncv_queue, | |
857 | .commit = fio_ime_psyncv_commit, | |
858 | .getevents = fio_ime_psyncv_getevents, | |
859 | .event = fio_ime_event, | |
860 | .open_file = fio_ime_open_file, | |
861 | .close_file = fio_ime_close_file, | |
862 | .get_file_size = fio_ime_get_file_size, | |
863 | .unlink_file = fio_ime_unlink_file, | |
864 | .flags = FIO_SYNCIO | FIO_DISKLESSIO, | |
865 | }; | |
866 | ||
867 | static struct ioengine_ops ioengine_aio = { | |
868 | .name = "ime_aio", | |
869 | .version = FIO_IOOPS_VERSION, | |
870 | .setup = fio_ime_setup, | |
871 | .init = fio_ime_aio_init, | |
872 | .cleanup = fio_ime_aio_clean, | |
873 | .queue = fio_ime_aio_queue, | |
874 | .commit = fio_ime_aio_commit, | |
875 | .getevents = fio_ime_aio_getevents, | |
876 | .event = fio_ime_event, | |
877 | .open_file = fio_ime_open_file, | |
878 | .close_file = fio_ime_close_file, | |
879 | .get_file_size = fio_ime_get_file_size, | |
880 | .unlink_file = fio_ime_unlink_file, | |
881 | .flags = FIO_DISKLESSIO, | |
882 | }; | |
883 | ||
884 | static void fio_init fio_ime_register(void) | |
885 | { | |
886 | register_ioengine(&ioengine_prw); | |
887 | register_ioengine(&ioengine_pvrw); | |
888 | register_ioengine(&ioengine_aio); | |
889 | } | |
890 | ||
891 | static void fio_exit fio_ime_unregister(void) | |
892 | { | |
893 | unregister_ioengine(&ioengine_prw); | |
894 | unregister_ioengine(&ioengine_pvrw); | |
895 | unregister_ioengine(&ioengine_aio); | |
38c1392e JA |
896 | |
897 | if (fio_ime_is_initialized && ime_native_finalize() < 0) | |
a40e7a59 | 898 | log_err("Warning: IME did not finalize properly\n"); |
a40e7a59 | 899 | } |