Commit | Line | Data |
---|---|---|
ac9b9101 JA |
1 | /* |
2 | * Code related to writing an iolog of what a thread is doing, and to | |
3 | * later read that back and replay | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <stdlib.h> | |
7 | #include <libgen.h> | |
8 | #include <assert.h> | |
9 | #include "flist.h" | |
10 | #include "fio.h" | |
11 | #include "verify.h" | |
12 | #include "trim.h" | |
13 | ||
14 | static const char iolog_ver2[] = "fio version 2 iolog"; | |
15 | ||
16 | void queue_io_piece(struct thread_data *td, struct io_piece *ipo) | |
17 | { | |
18 | flist_add_tail(&ipo->list, &td->io_log_list); | |
19 | td->total_io_size += ipo->len; | |
20 | } | |
21 | ||
22 | void log_io_u(struct thread_data *td, struct io_u *io_u) | |
23 | { | |
24 | const char *act[] = { "read", "write", "sync", "datasync", | |
25 | "sync_file_range", "wait", "trim" }; | |
26 | ||
27 | assert(io_u->ddir <= 6); | |
28 | ||
29 | if (!td->o.write_iolog_file) | |
30 | return; | |
31 | ||
32 | fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name, | |
33 | act[io_u->ddir], io_u->offset, | |
34 | io_u->buflen); | |
35 | } | |
36 | ||
37 | void log_file(struct thread_data *td, struct fio_file *f, | |
38 | enum file_log_act what) | |
39 | { | |
40 | const char *act[] = { "add", "open", "close" }; | |
41 | ||
42 | assert(what < 3); | |
43 | ||
44 | if (!td->o.write_iolog_file) | |
45 | return; | |
46 | ||
47 | ||
48 | /* | |
49 | * this happens on the pre-open/close done before the job starts | |
50 | */ | |
51 | if (!td->iolog_f) | |
52 | return; | |
53 | ||
54 | fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]); | |
55 | } | |
56 | ||
57 | static void iolog_delay(struct thread_data *td, unsigned long delay) | |
58 | { | |
59 | unsigned long usec = utime_since_now(&td->last_issue); | |
60 | ||
61 | if (delay < usec) | |
62 | return; | |
63 | ||
64 | delay -= usec; | |
65 | ||
66 | /* | |
67 | * less than 100 usec delay, just regard it as noise | |
68 | */ | |
69 | if (delay < 100) | |
70 | return; | |
71 | ||
72 | usec_sleep(td, delay); | |
73 | } | |
74 | ||
75 | static int ipo_special(struct thread_data *td, struct io_piece *ipo) | |
76 | { | |
77 | struct fio_file *f; | |
78 | int ret; | |
79 | ||
80 | /* | |
81 | * Not a special ipo | |
82 | */ | |
83 | if (ipo->ddir != DDIR_INVAL) | |
84 | return 0; | |
85 | ||
86 | f = td->files[ipo->fileno]; | |
87 | ||
88 | switch (ipo->file_action) { | |
89 | case FIO_LOG_OPEN_FILE: | |
90 | ret = td_io_open_file(td, f); | |
91 | if (!ret) | |
92 | break; | |
93 | td_verror(td, ret, "iolog open file"); | |
94 | return -1; | |
95 | case FIO_LOG_CLOSE_FILE: | |
96 | td_io_close_file(td, f); | |
97 | break; | |
98 | case FIO_LOG_UNLINK_FILE: | |
99 | unlink(f->file_name); | |
100 | break; | |
101 | default: | |
102 | log_err("fio: bad file action %d\n", ipo->file_action); | |
103 | break; | |
104 | } | |
105 | ||
106 | return 1; | |
107 | } | |
108 | ||
109 | int read_iolog_get(struct thread_data *td, struct io_u *io_u) | |
110 | { | |
111 | struct io_piece *ipo; | |
112 | unsigned long elapsed; | |
3c3ed070 | 113 | |
ac9b9101 JA |
114 | while (!flist_empty(&td->io_log_list)) { |
115 | int ret; | |
116 | ||
117 | ipo = flist_entry(td->io_log_list.next, struct io_piece, list); | |
118 | flist_del(&ipo->list); | |
119 | remove_trim_entry(td, ipo); | |
120 | ||
121 | ret = ipo_special(td, ipo); | |
122 | if (ret < 0) { | |
123 | free(ipo); | |
124 | break; | |
125 | } else if (ret > 0) { | |
126 | free(ipo); | |
127 | continue; | |
128 | } | |
129 | ||
130 | io_u->ddir = ipo->ddir; | |
131 | if (ipo->ddir != DDIR_WAIT) { | |
132 | io_u->offset = ipo->offset; | |
133 | io_u->buflen = ipo->len; | |
134 | io_u->file = td->files[ipo->fileno]; | |
135 | get_file(io_u->file); | |
136 | dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset, | |
137 | io_u->buflen, io_u->file->file_name); | |
138 | if (ipo->delay) | |
139 | iolog_delay(td, ipo->delay); | |
140 | } else { | |
141 | elapsed = mtime_since_genesis(); | |
142 | if (ipo->delay > elapsed) | |
143 | usec_sleep(td, (ipo->delay - elapsed) * 1000); | |
ac9b9101 JA |
144 | } |
145 | ||
146 | free(ipo); | |
3c3ed070 | 147 | |
ac9b9101 JA |
148 | if (io_u->ddir != DDIR_WAIT) |
149 | return 0; | |
150 | } | |
151 | ||
152 | td->done = 1; | |
153 | return 1; | |
154 | } | |
155 | ||
156 | void prune_io_piece_log(struct thread_data *td) | |
157 | { | |
158 | struct io_piece *ipo; | |
159 | struct rb_node *n; | |
160 | ||
161 | while ((n = rb_first(&td->io_hist_tree)) != NULL) { | |
162 | ipo = rb_entry(n, struct io_piece, rb_node); | |
163 | rb_erase(n, &td->io_hist_tree); | |
164 | remove_trim_entry(td, ipo); | |
165 | td->io_hist_len--; | |
166 | free(ipo); | |
167 | } | |
168 | ||
169 | while (!flist_empty(&td->io_hist_list)) { | |
170 | ipo = flist_entry(td->io_hist_list.next, struct io_piece, list); | |
171 | flist_del(&ipo->list); | |
172 | remove_trim_entry(td, ipo); | |
173 | td->io_hist_len--; | |
174 | free(ipo); | |
175 | } | |
176 | } | |
177 | ||
178 | /* | |
179 | * log a successful write, so we can unwind the log for verify | |
180 | */ | |
181 | void log_io_piece(struct thread_data *td, struct io_u *io_u) | |
182 | { | |
183 | struct rb_node **p, *parent; | |
184 | struct io_piece *ipo, *__ipo; | |
185 | ||
186 | ipo = malloc(sizeof(struct io_piece)); | |
187 | init_ipo(ipo); | |
188 | ipo->file = io_u->file; | |
189 | ipo->offset = io_u->offset; | |
190 | ipo->len = io_u->buflen; | |
da0a7bd2 | 191 | ipo->numberio = io_u->numberio; |
f9401285 JA |
192 | ipo->flags = IP_F_IN_FLIGHT; |
193 | ||
194 | io_u->ipo = ipo; | |
ac9b9101 JA |
195 | |
196 | if (io_u_should_trim(td, io_u)) { | |
197 | flist_add_tail(&ipo->trim_list, &td->trim_list); | |
198 | td->trim_entries++; | |
199 | } | |
200 | ||
201 | /* | |
202 | * We don't need to sort the entries, if: | |
203 | * | |
204 | * Sequential writes, or | |
205 | * Random writes that lay out the file as it goes along | |
206 | * | |
207 | * For both these cases, just reading back data in the order we | |
208 | * wrote it out is the fastest. | |
209 | * | |
210 | * One exception is if we don't have a random map AND we are doing | |
211 | * verifies, in that case we need to check for duplicate blocks and | |
212 | * drop the old one, which we rely on the rb insert/lookup for | |
213 | * handling. | |
214 | */ | |
c4b6117b | 215 | if (((!td->o.verifysort) || !td_random(td) || !td->o.overwrite) && |
ac9b9101 JA |
216 | (file_randommap(td, ipo->file) || td->o.verify == VERIFY_NONE)) { |
217 | INIT_FLIST_HEAD(&ipo->list); | |
218 | flist_add_tail(&ipo->list, &td->io_hist_list); | |
219 | ipo->flags |= IP_F_ONLIST; | |
220 | td->io_hist_len++; | |
221 | return; | |
222 | } | |
223 | ||
224 | RB_CLEAR_NODE(&ipo->rb_node); | |
225 | ||
226 | /* | |
227 | * Sort the entry into the verification list | |
228 | */ | |
229 | restart: | |
230 | p = &td->io_hist_tree.rb_node; | |
231 | parent = NULL; | |
232 | while (*p) { | |
233 | parent = *p; | |
234 | ||
235 | __ipo = rb_entry(parent, struct io_piece, rb_node); | |
236 | if (ipo->file < __ipo->file) | |
237 | p = &(*p)->rb_left; | |
238 | else if (ipo->file > __ipo->file) | |
239 | p = &(*p)->rb_right; | |
240 | else if (ipo->offset < __ipo->offset) | |
241 | p = &(*p)->rb_left; | |
242 | else if (ipo->offset > __ipo->offset) | |
243 | p = &(*p)->rb_right; | |
244 | else { | |
885ac623 JA |
245 | dprint(FD_IO, "iolog: overlap %llu/%lu, %llu/%lu", |
246 | __ipo->offset, __ipo->len, | |
247 | ipo->offset, ipo->len); | |
ac9b9101 JA |
248 | td->io_hist_len--; |
249 | rb_erase(parent, &td->io_hist_tree); | |
250 | remove_trim_entry(td, __ipo); | |
251 | free(__ipo); | |
252 | goto restart; | |
253 | } | |
254 | } | |
255 | ||
256 | rb_link_node(&ipo->rb_node, parent, p); | |
257 | rb_insert_color(&ipo->rb_node, &td->io_hist_tree); | |
258 | ipo->flags |= IP_F_ONRB; | |
259 | td->io_hist_len++; | |
260 | } | |
261 | ||
262 | void write_iolog_close(struct thread_data *td) | |
263 | { | |
264 | fflush(td->iolog_f); | |
265 | fclose(td->iolog_f); | |
266 | free(td->iolog_buf); | |
267 | td->iolog_f = NULL; | |
268 | td->iolog_buf = NULL; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Read version 2 iolog data. It is enhanced to include per-file logging, | |
273 | * syncs, etc. | |
274 | */ | |
275 | static int read_iolog2(struct thread_data *td, FILE *f) | |
276 | { | |
277 | unsigned long long offset; | |
278 | unsigned int bytes; | |
279 | int reads, writes, waits, fileno = 0, file_action = 0; /* stupid gcc */ | |
280 | char *fname, *act; | |
281 | char *str, *p; | |
282 | enum fio_ddir rw; | |
283 | ||
284 | free_release_files(td); | |
285 | ||
286 | /* | |
287 | * Read in the read iolog and store it, reuse the infrastructure | |
288 | * for doing verifications. | |
289 | */ | |
290 | str = malloc(4096); | |
291 | fname = malloc(256+16); | |
292 | act = malloc(256+16); | |
293 | ||
294 | reads = writes = waits = 0; | |
295 | while ((p = fgets(str, 4096, f)) != NULL) { | |
296 | struct io_piece *ipo; | |
297 | int r; | |
298 | ||
299 | r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset, | |
300 | &bytes); | |
301 | if (r == 4) { | |
302 | /* | |
303 | * Check action first | |
304 | */ | |
305 | if (!strcmp(act, "wait")) | |
306 | rw = DDIR_WAIT; | |
307 | else if (!strcmp(act, "read")) | |
308 | rw = DDIR_READ; | |
309 | else if (!strcmp(act, "write")) | |
310 | rw = DDIR_WRITE; | |
311 | else if (!strcmp(act, "sync")) | |
312 | rw = DDIR_SYNC; | |
313 | else if (!strcmp(act, "datasync")) | |
314 | rw = DDIR_DATASYNC; | |
315 | else if (!strcmp(act, "trim")) | |
316 | rw = DDIR_TRIM; | |
317 | else { | |
318 | log_err("fio: bad iolog file action: %s\n", | |
319 | act); | |
320 | continue; | |
321 | } | |
033ace1e | 322 | fileno = get_fileno(td, fname); |
ac9b9101 JA |
323 | } else if (r == 2) { |
324 | rw = DDIR_INVAL; | |
325 | if (!strcmp(act, "add")) { | |
5903e7b7 | 326 | fileno = add_file(td, fname, 0, 1); |
ac9b9101 JA |
327 | file_action = FIO_LOG_ADD_FILE; |
328 | continue; | |
329 | } else if (!strcmp(act, "open")) { | |
330 | fileno = get_fileno(td, fname); | |
331 | file_action = FIO_LOG_OPEN_FILE; | |
332 | } else if (!strcmp(act, "close")) { | |
333 | fileno = get_fileno(td, fname); | |
334 | file_action = FIO_LOG_CLOSE_FILE; | |
335 | } else { | |
336 | log_err("fio: bad iolog file action: %s\n", | |
337 | act); | |
338 | continue; | |
339 | } | |
340 | } else { | |
341 | log_err("bad iolog2: %s", p); | |
342 | continue; | |
343 | } | |
344 | ||
345 | if (rw == DDIR_READ) | |
346 | reads++; | |
347 | else if (rw == DDIR_WRITE) { | |
348 | /* | |
349 | * Don't add a write for ro mode | |
350 | */ | |
351 | if (read_only) | |
352 | continue; | |
353 | writes++; | |
354 | } else if (rw == DDIR_WAIT) { | |
355 | waits++; | |
356 | } else if (rw == DDIR_INVAL) { | |
357 | } else if (!ddir_sync(rw)) { | |
358 | log_err("bad ddir: %d\n", rw); | |
359 | continue; | |
360 | } | |
361 | ||
362 | /* | |
363 | * Make note of file | |
364 | */ | |
365 | ipo = malloc(sizeof(*ipo)); | |
366 | init_ipo(ipo); | |
367 | ipo->ddir = rw; | |
368 | if (rw == DDIR_WAIT) { | |
369 | ipo->delay = offset; | |
370 | } else { | |
371 | ipo->offset = offset; | |
372 | ipo->len = bytes; | |
373 | if (bytes > td->o.max_bs[rw]) | |
374 | td->o.max_bs[rw] = bytes; | |
375 | ipo->fileno = fileno; | |
376 | ipo->file_action = file_action; | |
377 | } | |
3c3ed070 | 378 | |
ac9b9101 JA |
379 | queue_io_piece(td, ipo); |
380 | } | |
381 | ||
382 | free(str); | |
383 | free(act); | |
384 | free(fname); | |
385 | ||
386 | if (writes && read_only) { | |
387 | log_err("fio: <%s> skips replay of %d writes due to" | |
388 | " read-only\n", td->o.name, writes); | |
389 | writes = 0; | |
390 | } | |
391 | ||
392 | if (!reads && !writes && !waits) | |
393 | return 1; | |
394 | else if (reads && !writes) | |
395 | td->o.td_ddir = TD_DDIR_READ; | |
396 | else if (!reads && writes) | |
397 | td->o.td_ddir = TD_DDIR_WRITE; | |
398 | else | |
399 | td->o.td_ddir = TD_DDIR_RW; | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | /* | |
405 | * open iolog, check version, and call appropriate parser | |
406 | */ | |
407 | static int init_iolog_read(struct thread_data *td) | |
408 | { | |
409 | char buffer[256], *p; | |
410 | FILE *f; | |
411 | int ret; | |
412 | ||
413 | f = fopen(td->o.read_iolog_file, "r"); | |
414 | if (!f) { | |
415 | perror("fopen read iolog"); | |
416 | return 1; | |
417 | } | |
418 | ||
419 | p = fgets(buffer, sizeof(buffer), f); | |
420 | if (!p) { | |
421 | td_verror(td, errno, "iolog read"); | |
422 | log_err("fio: unable to read iolog\n"); | |
423 | fclose(f); | |
424 | return 1; | |
425 | } | |
426 | ||
427 | /* | |
428 | * version 2 of the iolog stores a specific string as the | |
429 | * first line, check for that | |
430 | */ | |
431 | if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2))) | |
432 | ret = read_iolog2(td, f); | |
433 | else { | |
434 | log_err("fio: iolog version 1 is no longer supported\n"); | |
435 | ret = 1; | |
436 | } | |
437 | ||
438 | fclose(f); | |
439 | return ret; | |
440 | } | |
441 | ||
442 | /* | |
443 | * Set up a log for storing io patterns. | |
444 | */ | |
445 | static int init_iolog_write(struct thread_data *td) | |
446 | { | |
447 | struct fio_file *ff; | |
448 | FILE *f; | |
449 | unsigned int i; | |
450 | ||
451 | f = fopen(td->o.write_iolog_file, "a"); | |
452 | if (!f) { | |
453 | perror("fopen write iolog"); | |
454 | return 1; | |
455 | } | |
456 | ||
457 | /* | |
458 | * That's it for writing, setup a log buffer and we're done. | |
459 | */ | |
460 | td->iolog_f = f; | |
461 | td->iolog_buf = malloc(8192); | |
462 | setvbuf(f, td->iolog_buf, _IOFBF, 8192); | |
463 | ||
464 | /* | |
465 | * write our version line | |
466 | */ | |
467 | if (fprintf(f, "%s\n", iolog_ver2) < 0) { | |
468 | perror("iolog init\n"); | |
469 | return 1; | |
470 | } | |
471 | ||
472 | /* | |
473 | * add all known files | |
474 | */ | |
475 | for_each_file(td, ff, i) | |
476 | log_file(td, ff, FIO_LOG_ADD_FILE); | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | int init_iolog(struct thread_data *td) | |
482 | { | |
483 | int ret = 0; | |
484 | ||
485 | if (td->o.read_iolog_file) { | |
d95b34a6 JA |
486 | int need_swap; |
487 | ||
ac9b9101 JA |
488 | /* |
489 | * Check if it's a blktrace file and load that if possible. | |
490 | * Otherwise assume it's a normal log file and load that. | |
491 | */ | |
d95b34a6 JA |
492 | if (is_blktrace(td->o.read_iolog_file, &need_swap)) |
493 | ret = load_blktrace(td, td->o.read_iolog_file, need_swap); | |
ac9b9101 JA |
494 | else |
495 | ret = init_iolog_read(td); | |
496 | } else if (td->o.write_iolog_file) | |
497 | ret = init_iolog_write(td); | |
498 | ||
f01b34ae JA |
499 | if (ret) |
500 | td_verror(td, EINVAL, "failed initializing iolog"); | |
501 | ||
ac9b9101 JA |
502 | return ret; |
503 | } | |
504 | ||
ea51b956 | 505 | void setup_log(struct io_log **log, unsigned long avg_msec, int log_type) |
ac9b9101 JA |
506 | { |
507 | struct io_log *l = malloc(sizeof(*l)); | |
508 | ||
b8bc8cba | 509 | memset(l, 0, sizeof(*l)); |
ac9b9101 JA |
510 | l->nr_samples = 0; |
511 | l->max_samples = 1024; | |
ea51b956 | 512 | l->log_type = log_type; |
ac9b9101 | 513 | l->log = malloc(l->max_samples * sizeof(struct io_sample)); |
b8bc8cba | 514 | l->avg_msec = avg_msec; |
ac9b9101 JA |
515 | *log = l; |
516 | } | |
517 | ||
518 | void __finish_log(struct io_log *log, const char *name) | |
519 | { | |
520 | unsigned int i; | |
521 | FILE *f; | |
522 | ||
523 | f = fopen(name, "a"); | |
524 | if (!f) { | |
525 | perror("fopen log"); | |
526 | return; | |
527 | } | |
528 | ||
529 | for (i = 0; i < log->nr_samples; i++) { | |
1fae4855 JA |
530 | fprintf(f, "%lu, %lu, %u, %u\n", |
531 | (unsigned long) log->log[i].time, | |
532 | (unsigned long) log->log[i].val, | |
533 | log->log[i].ddir, log->log[i].bs); | |
ac9b9101 JA |
534 | } |
535 | ||
536 | fclose(f); | |
537 | free(log->log); | |
538 | free(log); | |
539 | } | |
540 | ||
541 | void finish_log_named(struct thread_data *td, struct io_log *log, | |
542 | const char *prefix, const char *postfix) | |
543 | { | |
544 | char file_name[256], *p; | |
545 | ||
98ffb8f3 | 546 | snprintf(file_name, sizeof(file_name), "%s_%s.log", prefix, postfix); |
ac9b9101 | 547 | p = basename(file_name); |
1b42725f | 548 | |
f5ed765a | 549 | if (td->client_type == FIO_CLIENT_TYPE_GUI) { |
1b42725f | 550 | fio_send_iolog(td, log, p); |
f5ed765a JA |
551 | free(log->log); |
552 | free(log); | |
553 | } else | |
554 | __finish_log(log, p); | |
ac9b9101 JA |
555 | } |
556 | ||
557 | void finish_log(struct thread_data *td, struct io_log *log, const char *name) | |
558 | { | |
559 | finish_log_named(td, log, td->o.name, name); | |
560 | } |