Commit | Line | Data |
---|---|---|
f29b25a3 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 | */ | |
3c39a379 JA |
5 | #include <stdio.h> |
6 | #include <stdlib.h> | |
f29b25a3 | 7 | #include <assert.h> |
3c39a379 JA |
8 | #include "list.h" |
9 | #include "fio.h" | |
10 | ||
f29b25a3 JA |
11 | static const char iolog_ver2[] = "fio version 2 iolog"; |
12 | ||
13 | void log_io_u(struct thread_data *td, struct io_u *io_u) | |
3c39a379 | 14 | { |
f29b25a3 JA |
15 | const char *act[] = { "read", "write", "sync" }; |
16 | ||
17 | assert(io_u->ddir < 3); | |
18 | ||
19 | if (!td->o.write_iolog_file) | |
20 | return; | |
21 | ||
22 | fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name, act[io_u->ddir], io_u->offset, io_u->buflen); | |
23 | } | |
24 | ||
25 | void log_file(struct thread_data *td, struct fio_file *f, | |
26 | enum file_log_act what) | |
27 | { | |
28 | const char *act[] = { "add", "open", "close" }; | |
29 | ||
30 | assert(what < 3); | |
31 | ||
32 | if (!td->o.write_iolog_file) | |
33 | return; | |
34 | ||
35 | fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]); | |
3c39a379 JA |
36 | } |
37 | ||
a61eddec JA |
38 | static void iolog_delay(struct thread_data *td, unsigned long delay) |
39 | { | |
40 | unsigned long usec = utime_since_now(&td->last_issue); | |
41 | ||
42 | if (delay < usec) | |
43 | return; | |
44 | ||
45 | delay -= usec; | |
46 | ||
47 | /* | |
48 | * less than 100 usec delay, just regard it as noise | |
49 | */ | |
50 | if (delay < 100) | |
51 | return; | |
52 | ||
53 | usec_sleep(td, delay); | |
54 | } | |
55 | ||
3c39a379 JA |
56 | int read_iolog_get(struct thread_data *td, struct io_u *io_u) |
57 | { | |
58 | struct io_piece *ipo; | |
59 | ||
b3f4b4f5 | 60 | while (!list_empty(&td->io_log_list)) { |
3c39a379 JA |
61 | ipo = list_entry(td->io_log_list.next, struct io_piece, list); |
62 | list_del(&ipo->list); | |
a61eddec | 63 | |
f29b25a3 JA |
64 | /* |
65 | * invalid ddir, this is a file action | |
66 | */ | |
429f6675 | 67 | if (ipo->ddir == DDIR_INVAL) { |
126d65c6 | 68 | struct fio_file *f = td->files[ipo->fileno]; |
f29b25a3 JA |
69 | |
70 | if (ipo->file_action == FIO_LOG_OPEN_FILE) { | |
71 | assert(!td_io_open_file(td, f)); | |
72 | free(ipo); | |
b3f4b4f5 | 73 | continue; |
f29b25a3 JA |
74 | } else if (ipo->file_action == FIO_LOG_CLOSE_FILE) { |
75 | td_io_close_file(td, f); | |
76 | free(ipo); | |
b3f4b4f5 | 77 | continue; |
f29b25a3 JA |
78 | } |
79 | } | |
80 | ||
429f6675 JA |
81 | io_u->offset = ipo->offset; |
82 | io_u->buflen = ipo->len; | |
83 | io_u->ddir = ipo->ddir; | |
126d65c6 | 84 | io_u->file = td->files[ipo->fileno]; |
429f6675 JA |
85 | get_file(io_u->file); |
86 | ||
ee56ad50 JA |
87 | dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset, |
88 | io_u->buflen, io_u->file->file_name); | |
89 | ||
a61eddec JA |
90 | if (ipo->delay) |
91 | iolog_delay(td, ipo->delay); | |
92 | ||
3c39a379 JA |
93 | free(ipo); |
94 | return 0; | |
95 | } | |
96 | ||
20e354ef | 97 | td->done = 1; |
3c39a379 JA |
98 | return 1; |
99 | } | |
100 | ||
101 | void prune_io_piece_log(struct thread_data *td) | |
102 | { | |
103 | struct io_piece *ipo; | |
4b87898e | 104 | struct rb_node *n; |
3c39a379 | 105 | |
4b87898e JA |
106 | while ((n = rb_first(&td->io_hist_tree)) != NULL) { |
107 | ipo = rb_entry(n, struct io_piece, rb_node); | |
108 | rb_erase(n, &td->io_hist_tree); | |
3c39a379 JA |
109 | free(ipo); |
110 | } | |
8ce9cd3d JA |
111 | |
112 | while (!list_empty(&td->io_hist_list)) { | |
113 | ipo = list_entry(td->io_hist_list.next, struct io_piece, list); | |
114 | list_del(&ipo->list); | |
115 | free(ipo); | |
116 | } | |
3c39a379 JA |
117 | } |
118 | ||
119 | /* | |
34403fb1 | 120 | * log a successful write, so we can unwind the log for verify |
3c39a379 JA |
121 | */ |
122 | void log_io_piece(struct thread_data *td, struct io_u *io_u) | |
123 | { | |
8de8f047 | 124 | struct rb_node **p, *parent; |
4b87898e | 125 | struct io_piece *ipo, *__ipo; |
3c39a379 | 126 | |
4b87898e | 127 | ipo = malloc(sizeof(struct io_piece)); |
53cdc686 | 128 | ipo->file = io_u->file; |
3c39a379 JA |
129 | ipo->offset = io_u->offset; |
130 | ipo->len = io_u->buflen; | |
131 | ||
8de8f047 JA |
132 | /* |
133 | * We don't need to sort the entries, if: | |
134 | * | |
135 | * Sequential writes, or | |
136 | * Random writes that lay out the file as it goes along | |
137 | * | |
138 | * For both these cases, just reading back data in the order we | |
139 | * wrote it out is the fastest. | |
140 | */ | |
9b23c9fb | 141 | if (!td_random(td) || !td->o.overwrite) { |
8de8f047 JA |
142 | INIT_LIST_HEAD(&ipo->list); |
143 | list_add_tail(&ipo->list, &td->io_hist_list); | |
144 | return; | |
145 | } | |
146 | ||
147 | RB_CLEAR_NODE(&ipo->rb_node); | |
148 | p = &td->io_hist_tree.rb_node; | |
149 | parent = NULL; | |
150 | ||
3c39a379 | 151 | /* |
4b87898e | 152 | * Sort the entry into the verification list |
3c39a379 | 153 | */ |
4b87898e JA |
154 | while (*p) { |
155 | parent = *p; | |
156 | ||
157 | __ipo = rb_entry(parent, struct io_piece, rb_node); | |
bb5d7d0b | 158 | if (ipo->offset <= __ipo->offset) |
4b87898e | 159 | p = &(*p)->rb_left; |
4b87898e | 160 | else |
bb5d7d0b | 161 | p = &(*p)->rb_right; |
3c39a379 JA |
162 | } |
163 | ||
4b87898e JA |
164 | rb_link_node(&ipo->rb_node, parent, p); |
165 | rb_insert_color(&ipo->rb_node, &td->io_hist_tree); | |
3c39a379 JA |
166 | } |
167 | ||
168 | void write_iolog_close(struct thread_data *td) | |
169 | { | |
170 | fflush(td->iolog_f); | |
171 | fclose(td->iolog_f); | |
172 | free(td->iolog_buf); | |
f29b25a3 JA |
173 | td->iolog_f = NULL; |
174 | td->iolog_buf = NULL; | |
3c39a379 JA |
175 | } |
176 | ||
fb71fbd7 | 177 | /* |
f29b25a3 JA |
178 | * Read version 2 iolog data. It is enhanced to include per-file logging, |
179 | * syncs, etc. | |
fb71fbd7 | 180 | */ |
f29b25a3 | 181 | static int read_iolog2(struct thread_data *td, FILE *f) |
3c39a379 JA |
182 | { |
183 | unsigned long long offset; | |
184 | unsigned int bytes; | |
53fa9b69 | 185 | int reads, writes, fileno = 0, file_action = 0; /* stupid gcc */ |
f29b25a3 | 186 | char *fname, *act; |
3c39a379 | 187 | char *str, *p; |
53fa9b69 | 188 | enum fio_ddir rw; |
3c39a379 | 189 | |
f29b25a3 JA |
190 | free_release_files(td); |
191 | ||
192 | /* | |
193 | * Read in the read iolog and store it, reuse the infrastructure | |
194 | * for doing verifications. | |
195 | */ | |
196 | str = malloc(4096); | |
197 | fname = malloc(256+16); | |
198 | act = malloc(256+16); | |
199 | ||
200 | reads = writes = 0; | |
201 | while ((p = fgets(str, 4096, f)) != NULL) { | |
202 | struct io_piece *ipo; | |
203 | int r; | |
204 | ||
205 | r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset, &bytes); | |
206 | if (r == 4) { | |
207 | /* | |
208 | * Check action first | |
209 | */ | |
210 | if (!strcmp(act, "read")) | |
211 | rw = DDIR_READ; | |
212 | else if (!strcmp(act, "write")) | |
213 | rw = DDIR_WRITE; | |
214 | else if (!strcmp(act, "sync")) | |
215 | rw = DDIR_SYNC; | |
216 | else { | |
217 | log_err("fio: bad iolog file action: %s\n",act); | |
218 | continue; | |
219 | } | |
220 | } else if (r == 2) { | |
221 | rw = DDIR_INVAL; | |
222 | if (!strcmp(act, "add")) { | |
223 | td->o.nr_files++; | |
224 | fileno = add_file(td, fname); | |
225 | file_action = FIO_LOG_ADD_FILE; | |
226 | continue; | |
227 | } else if (!strcmp(act, "open")) { | |
228 | fileno = get_fileno(td, fname); | |
229 | file_action = FIO_LOG_OPEN_FILE; | |
230 | } else if (!strcmp(act, "close")) { | |
231 | fileno = get_fileno(td, fname); | |
232 | file_action = FIO_LOG_CLOSE_FILE; | |
233 | } else { | |
234 | log_err("fio: bad iolog file action: %s\n",act); | |
235 | continue; | |
236 | } | |
237 | } else { | |
238 | log_err("bad iolog2: %s", p); | |
239 | continue; | |
240 | } | |
241 | ||
242 | if (rw == DDIR_READ) | |
243 | reads++; | |
4241ea8f | 244 | else if (rw == DDIR_WRITE) { |
f29b25a3 | 245 | writes++; |
4241ea8f JA |
246 | /* |
247 | * Don't add a write for ro mode | |
248 | */ | |
249 | if (read_only) | |
250 | continue; | |
251 | } else if (rw != DDIR_SYNC && rw != DDIR_INVAL) { | |
f29b25a3 JA |
252 | log_err("bad ddir: %d\n", rw); |
253 | continue; | |
254 | } | |
255 | ||
256 | /* | |
257 | * Make note of file | |
258 | */ | |
259 | ipo = malloc(sizeof(*ipo)); | |
260 | memset(ipo, 0, sizeof(*ipo)); | |
261 | INIT_LIST_HEAD(&ipo->list); | |
262 | ipo->offset = offset; | |
263 | ipo->len = bytes; | |
53fa9b69 | 264 | ipo->ddir = rw; |
f29b25a3 JA |
265 | if (bytes > td->o.max_bs[rw]) |
266 | td->o.max_bs[rw] = bytes; | |
267 | if (rw == DDIR_INVAL) { | |
268 | ipo->fileno = fileno; | |
269 | ipo->file_action = file_action; | |
270 | } | |
271 | list_add_tail(&ipo->list, &td->io_log_list); | |
ea966f81 | 272 | td->total_io_size += bytes; |
3c39a379 JA |
273 | } |
274 | ||
f29b25a3 JA |
275 | free(str); |
276 | free(act); | |
277 | free(fname); | |
278 | ||
4241ea8f JA |
279 | if (writes && read_only) { |
280 | log_err("fio: <%s> skips replay of %d writes due to read-only\n", td->o.name, writes); | |
281 | writes = 0; | |
282 | } | |
283 | ||
f29b25a3 JA |
284 | if (!reads && !writes) |
285 | return 1; | |
286 | else if (reads && !writes) | |
287 | td->o.td_ddir = TD_DDIR_READ; | |
288 | else if (!reads && writes) | |
289 | td->o.td_ddir = TD_DDIR_WRITE; | |
290 | else | |
291 | td->o.td_ddir = TD_DDIR_RW; | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Read version 1 iolog data. | |
298 | */ | |
299 | static int read_iolog(struct thread_data *td, FILE *f) | |
300 | { | |
301 | unsigned long long offset; | |
302 | unsigned int bytes; | |
303 | char *str, *p; | |
21bd2987 | 304 | int reads, writes; |
59b9ddfc | 305 | int rw; |
f29b25a3 | 306 | |
3c39a379 JA |
307 | /* |
308 | * Read in the read iolog and store it, reuse the infrastructure | |
309 | * for doing verifications. | |
310 | */ | |
311 | str = malloc(4096); | |
fb71fbd7 | 312 | reads = writes = 0; |
3c39a379 JA |
313 | while ((p = fgets(str, 4096, f)) != NULL) { |
314 | struct io_piece *ipo; | |
315 | ||
316 | if (sscanf(p, "%d,%llu,%u", &rw, &offset, &bytes) != 3) { | |
3b70d7e5 | 317 | log_err("bad iolog: %s\n", p); |
3c39a379 JA |
318 | continue; |
319 | } | |
320 | if (rw == DDIR_READ) | |
321 | reads++; | |
4241ea8f | 322 | else if (rw == DDIR_WRITE) { |
3c39a379 | 323 | writes++; |
4241ea8f JA |
324 | /* |
325 | * Don't add a write for ro mode | |
326 | */ | |
327 | if (read_only) | |
328 | continue; | |
329 | } else if (rw != DDIR_SYNC) { | |
3b70d7e5 | 330 | log_err("bad ddir: %d\n", rw); |
3c39a379 JA |
331 | continue; |
332 | } | |
333 | ||
334 | ipo = malloc(sizeof(*ipo)); | |
733ed597 | 335 | memset(ipo, 0, sizeof(*ipo)); |
3c39a379 JA |
336 | INIT_LIST_HEAD(&ipo->list); |
337 | ipo->offset = offset; | |
338 | ipo->len = bytes; | |
59b9ddfc | 339 | ipo->ddir = (enum fio_ddir) rw; |
2dc1bbeb JA |
340 | if (bytes > td->o.max_bs[rw]) |
341 | td->o.max_bs[rw] = bytes; | |
3c39a379 | 342 | list_add_tail(&ipo->list, &td->io_log_list); |
ea966f81 | 343 | td->total_io_size += bytes; |
3c39a379 JA |
344 | } |
345 | ||
346 | free(str); | |
3c39a379 | 347 | |
4241ea8f JA |
348 | if (writes && read_only) { |
349 | log_err("fio: <%s> skips replay of %d writes due to read-only\n", td->o.name, writes); | |
350 | writes = 0; | |
351 | } | |
352 | ||
fb71fbd7 | 353 | if (!reads && !writes) |
3c39a379 | 354 | return 1; |
fb71fbd7 | 355 | else if (reads && !writes) |
2dc1bbeb | 356 | td->o.td_ddir = TD_DDIR_READ; |
3c39a379 | 357 | else if (!reads && writes) |
36361ebb | 358 | td->o.td_ddir = TD_DDIR_WRITE; |
3c39a379 | 359 | else |
2dc1bbeb | 360 | td->o.td_ddir = TD_DDIR_RW; |
3c39a379 JA |
361 | |
362 | return 0; | |
363 | } | |
8914a9d8 | 364 | |
fb71fbd7 | 365 | /* |
f29b25a3 | 366 | * open iolog, check version, and call appropriate parser |
fb71fbd7 | 367 | */ |
f29b25a3 | 368 | static int init_iolog_read(struct thread_data *td) |
fb71fbd7 | 369 | { |
f29b25a3 | 370 | char buffer[256], *p; |
076efc7c | 371 | FILE *f; |
f29b25a3 JA |
372 | int ret; |
373 | ||
374 | f = fopen(td->o.read_iolog_file, "r"); | |
375 | if (!f) { | |
376 | perror("fopen read iolog"); | |
377 | return 1; | |
378 | } | |
fb71fbd7 | 379 | |
f29b25a3 JA |
380 | p = fgets(buffer, sizeof(buffer), f); |
381 | if (!p) { | |
382 | td_verror(td, errno, "iolog read"); | |
383 | log_err("fio: unable to read iolog\n"); | |
733ed597 JA |
384 | return 1; |
385 | } | |
386 | ||
f29b25a3 JA |
387 | /* |
388 | * version 2 of the iolog stores a specific string as the | |
389 | * first line, check for that | |
390 | */ | |
391 | if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2))) | |
392 | ret = read_iolog2(td, f); | |
393 | else { | |
394 | /* | |
395 | * seek back to the beginning | |
396 | */ | |
397 | if (fseek(f, 0, SEEK_SET) < 0) { | |
398 | td_verror(td, errno, "iolog read"); | |
399 | log_err("fio: unable to read iolog\n"); | |
400 | return 1; | |
401 | } | |
402 | ||
403 | ret = read_iolog(td, f); | |
404 | } | |
405 | ||
406 | fclose(f); | |
407 | return ret; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Setup a log for storing io patterns. | |
412 | */ | |
413 | static int init_iolog_write(struct thread_data *td) | |
414 | { | |
415 | struct fio_file *ff; | |
416 | FILE *f; | |
417 | unsigned int i; | |
418 | ||
2dc1bbeb | 419 | f = fopen(td->o.write_iolog_file, "w+"); |
fb71fbd7 JA |
420 | if (!f) { |
421 | perror("fopen write iolog"); | |
422 | return 1; | |
423 | } | |
424 | ||
425 | /* | |
426 | * That's it for writing, setup a log buffer and we're done. | |
427 | */ | |
428 | td->iolog_f = f; | |
429 | td->iolog_buf = malloc(8192); | |
430 | setvbuf(f, td->iolog_buf, _IOFBF, 8192); | |
f29b25a3 JA |
431 | |
432 | /* | |
433 | * write our version line | |
434 | */ | |
435 | if (fprintf(f, "%s\n", iolog_ver2) < 0) { | |
436 | perror("iolog init\n"); | |
437 | return 1; | |
438 | } | |
439 | ||
440 | /* | |
441 | * add all known files | |
442 | */ | |
443 | for_each_file(td, ff, i) | |
444 | log_file(td, ff, FIO_LOG_ADD_FILE); | |
445 | ||
fb71fbd7 JA |
446 | return 0; |
447 | } | |
448 | ||
449 | int init_iolog(struct thread_data *td) | |
450 | { | |
b4a6a59a JA |
451 | int ret = 0; |
452 | ||
ba0fbe10 | 453 | if (td->io_ops->flags & FIO_DISKLESSIO) |
f48b467c JA |
454 | return 0; |
455 | ||
fb7b71a3 JA |
456 | if (td->o.read_iolog_file) { |
457 | /* | |
458 | * Check if it's a blktrace file and load that if possible. | |
459 | * Otherwise assume it's a normal log file and load that. | |
460 | */ | |
461 | if (is_blktrace(td->o.read_iolog_file)) | |
462 | ret = load_blktrace(td, td->o.read_iolog_file); | |
463 | else | |
464 | ret = init_iolog_read(td); | |
465 | } else if (td->o.write_iolog_file) | |
b4a6a59a | 466 | ret = init_iolog_write(td); |
fb71fbd7 | 467 | |
1e97cce9 | 468 | return ret; |
fb71fbd7 JA |
469 | } |
470 | ||
8914a9d8 JA |
471 | void setup_log(struct io_log **log) |
472 | { | |
473 | struct io_log *l = malloc(sizeof(*l)); | |
474 | ||
475 | l->nr_samples = 0; | |
476 | l->max_samples = 1024; | |
477 | l->log = malloc(l->max_samples * sizeof(struct io_sample)); | |
478 | *log = l; | |
479 | } | |
480 | ||
bb3884d8 | 481 | void __finish_log(struct io_log *log, const char *name) |
8914a9d8 | 482 | { |
8914a9d8 | 483 | unsigned int i; |
bb3884d8 | 484 | FILE *f; |
8914a9d8 | 485 | |
bb3884d8 | 486 | f = fopen(name, "w"); |
8914a9d8 JA |
487 | if (!f) { |
488 | perror("fopen log"); | |
489 | return; | |
490 | } | |
491 | ||
492 | for (i = 0; i < log->nr_samples; i++) | |
493 | fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, log->log[i].ddir); | |
494 | ||
495 | fclose(f); | |
496 | free(log->log); | |
497 | free(log); | |
498 | } | |
bb3884d8 JA |
499 | |
500 | void finish_log(struct thread_data *td, struct io_log *log, const char *name) | |
501 | { | |
502 | char file_name[256]; | |
503 | ||
504 | snprintf(file_name, 200, "client%d_%s.log", td->thread_number, name); | |
505 | __finish_log(log, file_name); | |
506 | } |