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> | |
5921e80c | 7 | #include <libgen.h> |
f29b25a3 | 8 | #include <assert.h> |
01743ee1 | 9 | #include "flist.h" |
3c39a379 JA |
10 | #include "fio.h" |
11 | ||
f29b25a3 JA |
12 | static const char iolog_ver2[] = "fio version 2 iolog"; |
13 | ||
691c8fb0 JA |
14 | void queue_io_piece(struct thread_data *td, struct io_piece *ipo) |
15 | { | |
01743ee1 | 16 | flist_add_tail(&ipo->list, &td->io_log_list); |
691c8fb0 JA |
17 | td->total_io_size += ipo->len; |
18 | } | |
19 | ||
f29b25a3 | 20 | void log_io_u(struct thread_data *td, struct io_u *io_u) |
3c39a379 | 21 | { |
f29b25a3 JA |
22 | const char *act[] = { "read", "write", "sync" }; |
23 | ||
24 | assert(io_u->ddir < 3); | |
25 | ||
26 | if (!td->o.write_iolog_file) | |
27 | return; | |
28 | ||
5ec10eaa JA |
29 | fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name, |
30 | act[io_u->ddir], io_u->offset, | |
31 | io_u->buflen); | |
f29b25a3 JA |
32 | } |
33 | ||
34 | void log_file(struct thread_data *td, struct fio_file *f, | |
35 | enum file_log_act what) | |
36 | { | |
37 | const char *act[] = { "add", "open", "close" }; | |
38 | ||
39 | assert(what < 3); | |
40 | ||
41 | if (!td->o.write_iolog_file) | |
42 | return; | |
43 | ||
393ca7e9 JA |
44 | |
45 | /* | |
46 | * this happens on the pre-open/close done before the job starts | |
47 | */ | |
48 | if (!td->iolog_f) | |
49 | return; | |
50 | ||
f29b25a3 | 51 | fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]); |
3c39a379 JA |
52 | } |
53 | ||
a61eddec JA |
54 | static void iolog_delay(struct thread_data *td, unsigned long delay) |
55 | { | |
56 | unsigned long usec = utime_since_now(&td->last_issue); | |
57 | ||
58 | if (delay < usec) | |
59 | return; | |
60 | ||
61 | delay -= usec; | |
62 | ||
63 | /* | |
64 | * less than 100 usec delay, just regard it as noise | |
65 | */ | |
66 | if (delay < 100) | |
67 | return; | |
68 | ||
69 | usec_sleep(td, delay); | |
70 | } | |
71 | ||
f718273e JA |
72 | static int ipo_special(struct thread_data *td, struct io_piece *ipo) |
73 | { | |
74 | struct fio_file *f; | |
75 | int ret; | |
76 | ||
77 | /* | |
78 | * Not a special ipo | |
79 | */ | |
80 | if (ipo->ddir != DDIR_INVAL) | |
81 | return 0; | |
82 | ||
83 | f = td->files[ipo->fileno]; | |
84 | ||
85 | switch (ipo->file_action) { | |
86 | case FIO_LOG_OPEN_FILE: | |
87 | ret = td_io_open_file(td, f); | |
88 | if (!ret) { | |
89 | free(ipo); | |
90 | break; | |
91 | } | |
92 | td_verror(td, ret, "iolog open file"); | |
93 | return -1; | |
94 | case FIO_LOG_CLOSE_FILE: | |
95 | td_io_close_file(td, f); | |
96 | break; | |
97 | case FIO_LOG_UNLINK_FILE: | |
98 | unlink(f->file_name); | |
99 | break; | |
100 | default: | |
101 | log_err("fio: bad file action %d\n", ipo->file_action); | |
102 | break; | |
103 | } | |
104 | ||
105 | return 1; | |
106 | } | |
107 | ||
3c39a379 JA |
108 | int read_iolog_get(struct thread_data *td, struct io_u *io_u) |
109 | { | |
110 | struct io_piece *ipo; | |
111 | ||
01743ee1 | 112 | while (!flist_empty(&td->io_log_list)) { |
f718273e JA |
113 | int ret; |
114 | ||
01743ee1 JA |
115 | ipo = flist_entry(td->io_log_list.next, struct io_piece, list); |
116 | flist_del(&ipo->list); | |
a61eddec | 117 | |
f718273e JA |
118 | ret = ipo_special(td, ipo); |
119 | if (ret < 0) { | |
120 | free(ipo); | |
121 | break; | |
122 | } else if (ret > 0) { | |
123 | free(ipo); | |
124 | continue; | |
f29b25a3 JA |
125 | } |
126 | ||
429f6675 JA |
127 | io_u->offset = ipo->offset; |
128 | io_u->buflen = ipo->len; | |
129 | io_u->ddir = ipo->ddir; | |
126d65c6 | 130 | io_u->file = td->files[ipo->fileno]; |
429f6675 JA |
131 | get_file(io_u->file); |
132 | ||
ee56ad50 JA |
133 | dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset, |
134 | io_u->buflen, io_u->file->file_name); | |
135 | ||
a61eddec JA |
136 | if (ipo->delay) |
137 | iolog_delay(td, ipo->delay); | |
138 | ||
3c39a379 JA |
139 | free(ipo); |
140 | return 0; | |
141 | } | |
142 | ||
20e354ef | 143 | td->done = 1; |
3c39a379 JA |
144 | return 1; |
145 | } | |
146 | ||
147 | void prune_io_piece_log(struct thread_data *td) | |
148 | { | |
149 | struct io_piece *ipo; | |
4b87898e | 150 | struct rb_node *n; |
3c39a379 | 151 | |
4b87898e JA |
152 | while ((n = rb_first(&td->io_hist_tree)) != NULL) { |
153 | ipo = rb_entry(n, struct io_piece, rb_node); | |
154 | rb_erase(n, &td->io_hist_tree); | |
3c39a379 JA |
155 | free(ipo); |
156 | } | |
8ce9cd3d | 157 | |
01743ee1 JA |
158 | while (!flist_empty(&td->io_hist_list)) { |
159 | ipo = flist_entry(td->io_hist_list.next, struct io_piece, list); | |
160 | flist_del(&ipo->list); | |
8ce9cd3d JA |
161 | free(ipo); |
162 | } | |
3c39a379 JA |
163 | } |
164 | ||
165 | /* | |
34403fb1 | 166 | * log a successful write, so we can unwind the log for verify |
3c39a379 JA |
167 | */ |
168 | void log_io_piece(struct thread_data *td, struct io_u *io_u) | |
169 | { | |
8de8f047 | 170 | struct rb_node **p, *parent; |
4b87898e | 171 | struct io_piece *ipo, *__ipo; |
3c39a379 | 172 | |
4b87898e | 173 | ipo = malloc(sizeof(struct io_piece)); |
53cdc686 | 174 | ipo->file = io_u->file; |
3c39a379 JA |
175 | ipo->offset = io_u->offset; |
176 | ipo->len = io_u->buflen; | |
177 | ||
8de8f047 JA |
178 | /* |
179 | * We don't need to sort the entries, if: | |
180 | * | |
181 | * Sequential writes, or | |
182 | * Random writes that lay out the file as it goes along | |
183 | * | |
184 | * For both these cases, just reading back data in the order we | |
185 | * wrote it out is the fastest. | |
186 | */ | |
9b23c9fb | 187 | if (!td_random(td) || !td->o.overwrite) { |
01743ee1 JA |
188 | INIT_FLIST_HEAD(&ipo->list); |
189 | flist_add_tail(&ipo->list, &td->io_hist_list); | |
8de8f047 JA |
190 | return; |
191 | } | |
192 | ||
193 | RB_CLEAR_NODE(&ipo->rb_node); | |
194 | p = &td->io_hist_tree.rb_node; | |
195 | parent = NULL; | |
196 | ||
3c39a379 | 197 | /* |
4b87898e | 198 | * Sort the entry into the verification list |
3c39a379 | 199 | */ |
4b87898e JA |
200 | while (*p) { |
201 | parent = *p; | |
202 | ||
203 | __ipo = rb_entry(parent, struct io_piece, rb_node); | |
bb5d7d0b | 204 | if (ipo->offset <= __ipo->offset) |
4b87898e | 205 | p = &(*p)->rb_left; |
4b87898e | 206 | else |
bb5d7d0b | 207 | p = &(*p)->rb_right; |
3c39a379 JA |
208 | } |
209 | ||
4b87898e JA |
210 | rb_link_node(&ipo->rb_node, parent, p); |
211 | rb_insert_color(&ipo->rb_node, &td->io_hist_tree); | |
3c39a379 JA |
212 | } |
213 | ||
214 | void write_iolog_close(struct thread_data *td) | |
215 | { | |
216 | fflush(td->iolog_f); | |
217 | fclose(td->iolog_f); | |
218 | free(td->iolog_buf); | |
f29b25a3 JA |
219 | td->iolog_f = NULL; |
220 | td->iolog_buf = NULL; | |
3c39a379 JA |
221 | } |
222 | ||
fb71fbd7 | 223 | /* |
f29b25a3 JA |
224 | * Read version 2 iolog data. It is enhanced to include per-file logging, |
225 | * syncs, etc. | |
fb71fbd7 | 226 | */ |
f29b25a3 | 227 | static int read_iolog2(struct thread_data *td, FILE *f) |
3c39a379 JA |
228 | { |
229 | unsigned long long offset; | |
230 | unsigned int bytes; | |
53fa9b69 | 231 | int reads, writes, fileno = 0, file_action = 0; /* stupid gcc */ |
f29b25a3 | 232 | char *fname, *act; |
3c39a379 | 233 | char *str, *p; |
53fa9b69 | 234 | enum fio_ddir rw; |
3c39a379 | 235 | |
f29b25a3 JA |
236 | free_release_files(td); |
237 | ||
238 | /* | |
239 | * Read in the read iolog and store it, reuse the infrastructure | |
240 | * for doing verifications. | |
241 | */ | |
242 | str = malloc(4096); | |
243 | fname = malloc(256+16); | |
244 | act = malloc(256+16); | |
245 | ||
246 | reads = writes = 0; | |
247 | while ((p = fgets(str, 4096, f)) != NULL) { | |
248 | struct io_piece *ipo; | |
249 | int r; | |
250 | ||
5ec10eaa JA |
251 | r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset, |
252 | &bytes); | |
f29b25a3 JA |
253 | if (r == 4) { |
254 | /* | |
255 | * Check action first | |
256 | */ | |
257 | if (!strcmp(act, "read")) | |
258 | rw = DDIR_READ; | |
259 | else if (!strcmp(act, "write")) | |
260 | rw = DDIR_WRITE; | |
261 | else if (!strcmp(act, "sync")) | |
262 | rw = DDIR_SYNC; | |
263 | else { | |
5ec10eaa JA |
264 | log_err("fio: bad iolog file action: %s\n", |
265 | act); | |
f29b25a3 JA |
266 | continue; |
267 | } | |
268 | } else if (r == 2) { | |
269 | rw = DDIR_INVAL; | |
270 | if (!strcmp(act, "add")) { | |
271 | td->o.nr_files++; | |
272 | fileno = add_file(td, fname); | |
273 | file_action = FIO_LOG_ADD_FILE; | |
274 | continue; | |
275 | } else if (!strcmp(act, "open")) { | |
276 | fileno = get_fileno(td, fname); | |
277 | file_action = FIO_LOG_OPEN_FILE; | |
278 | } else if (!strcmp(act, "close")) { | |
279 | fileno = get_fileno(td, fname); | |
280 | file_action = FIO_LOG_CLOSE_FILE; | |
281 | } else { | |
5ec10eaa JA |
282 | log_err("fio: bad iolog file action: %s\n", |
283 | act); | |
f29b25a3 JA |
284 | continue; |
285 | } | |
286 | } else { | |
287 | log_err("bad iolog2: %s", p); | |
288 | continue; | |
289 | } | |
5ec10eaa | 290 | |
f29b25a3 JA |
291 | if (rw == DDIR_READ) |
292 | reads++; | |
4241ea8f | 293 | else if (rw == DDIR_WRITE) { |
4241ea8f JA |
294 | /* |
295 | * Don't add a write for ro mode | |
296 | */ | |
297 | if (read_only) | |
298 | continue; | |
ed4aa707 | 299 | writes++; |
4241ea8f | 300 | } else if (rw != DDIR_SYNC && rw != DDIR_INVAL) { |
f29b25a3 JA |
301 | log_err("bad ddir: %d\n", rw); |
302 | continue; | |
303 | } | |
304 | ||
305 | /* | |
306 | * Make note of file | |
307 | */ | |
308 | ipo = malloc(sizeof(*ipo)); | |
309 | memset(ipo, 0, sizeof(*ipo)); | |
01743ee1 | 310 | INIT_FLIST_HEAD(&ipo->list); |
f29b25a3 JA |
311 | ipo->offset = offset; |
312 | ipo->len = bytes; | |
53fa9b69 | 313 | ipo->ddir = rw; |
f29b25a3 JA |
314 | if (bytes > td->o.max_bs[rw]) |
315 | td->o.max_bs[rw] = bytes; | |
316 | if (rw == DDIR_INVAL) { | |
317 | ipo->fileno = fileno; | |
318 | ipo->file_action = file_action; | |
319 | } | |
691c8fb0 | 320 | queue_io_piece(td, ipo); |
3c39a379 JA |
321 | } |
322 | ||
f29b25a3 JA |
323 | free(str); |
324 | free(act); | |
325 | free(fname); | |
326 | ||
4241ea8f | 327 | if (writes && read_only) { |
5ec10eaa JA |
328 | log_err("fio: <%s> skips replay of %d writes due to" |
329 | " read-only\n", td->o.name, writes); | |
4241ea8f JA |
330 | writes = 0; |
331 | } | |
332 | ||
f29b25a3 JA |
333 | if (!reads && !writes) |
334 | return 1; | |
335 | else if (reads && !writes) | |
336 | td->o.td_ddir = TD_DDIR_READ; | |
337 | else if (!reads && writes) | |
338 | td->o.td_ddir = TD_DDIR_WRITE; | |
339 | else | |
340 | td->o.td_ddir = TD_DDIR_RW; | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
fb71fbd7 | 345 | /* |
f29b25a3 | 346 | * open iolog, check version, and call appropriate parser |
fb71fbd7 | 347 | */ |
f29b25a3 | 348 | static int init_iolog_read(struct thread_data *td) |
fb71fbd7 | 349 | { |
f29b25a3 | 350 | char buffer[256], *p; |
076efc7c | 351 | FILE *f; |
f29b25a3 JA |
352 | int ret; |
353 | ||
354 | f = fopen(td->o.read_iolog_file, "r"); | |
355 | if (!f) { | |
356 | perror("fopen read iolog"); | |
357 | return 1; | |
358 | } | |
fb71fbd7 | 359 | |
f29b25a3 JA |
360 | p = fgets(buffer, sizeof(buffer), f); |
361 | if (!p) { | |
362 | td_verror(td, errno, "iolog read"); | |
363 | log_err("fio: unable to read iolog\n"); | |
733ed597 JA |
364 | return 1; |
365 | } | |
366 | ||
f29b25a3 JA |
367 | /* |
368 | * version 2 of the iolog stores a specific string as the | |
369 | * first line, check for that | |
370 | */ | |
371 | if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2))) | |
372 | ret = read_iolog2(td, f); | |
373 | else { | |
aec2de20 JA |
374 | log_err("fio: iolog version 1 is no longer supported\n"); |
375 | ret = 1; | |
f29b25a3 JA |
376 | } |
377 | ||
378 | fclose(f); | |
379 | return ret; | |
380 | } | |
381 | ||
382 | /* | |
383 | * Setup a log for storing io patterns. | |
384 | */ | |
385 | static int init_iolog_write(struct thread_data *td) | |
386 | { | |
387 | struct fio_file *ff; | |
388 | FILE *f; | |
389 | unsigned int i; | |
390 | ||
c12f6dab | 391 | f = fopen(td->o.write_iolog_file, "a"); |
fb71fbd7 JA |
392 | if (!f) { |
393 | perror("fopen write iolog"); | |
394 | return 1; | |
395 | } | |
396 | ||
397 | /* | |
398 | * That's it for writing, setup a log buffer and we're done. | |
399 | */ | |
400 | td->iolog_f = f; | |
401 | td->iolog_buf = malloc(8192); | |
402 | setvbuf(f, td->iolog_buf, _IOFBF, 8192); | |
f29b25a3 JA |
403 | |
404 | /* | |
405 | * write our version line | |
406 | */ | |
407 | if (fprintf(f, "%s\n", iolog_ver2) < 0) { | |
408 | perror("iolog init\n"); | |
409 | return 1; | |
410 | } | |
411 | ||
412 | /* | |
413 | * add all known files | |
414 | */ | |
415 | for_each_file(td, ff, i) | |
416 | log_file(td, ff, FIO_LOG_ADD_FILE); | |
417 | ||
fb71fbd7 JA |
418 | return 0; |
419 | } | |
420 | ||
421 | int init_iolog(struct thread_data *td) | |
422 | { | |
b4a6a59a JA |
423 | int ret = 0; |
424 | ||
ba0fbe10 | 425 | if (td->io_ops->flags & FIO_DISKLESSIO) |
f48b467c JA |
426 | return 0; |
427 | ||
fb7b71a3 JA |
428 | if (td->o.read_iolog_file) { |
429 | /* | |
430 | * Check if it's a blktrace file and load that if possible. | |
431 | * Otherwise assume it's a normal log file and load that. | |
432 | */ | |
433 | if (is_blktrace(td->o.read_iolog_file)) | |
434 | ret = load_blktrace(td, td->o.read_iolog_file); | |
435 | else | |
436 | ret = init_iolog_read(td); | |
437 | } else if (td->o.write_iolog_file) | |
b4a6a59a | 438 | ret = init_iolog_write(td); |
fb71fbd7 | 439 | |
1e97cce9 | 440 | return ret; |
fb71fbd7 JA |
441 | } |
442 | ||
8914a9d8 JA |
443 | void setup_log(struct io_log **log) |
444 | { | |
445 | struct io_log *l = malloc(sizeof(*l)); | |
446 | ||
447 | l->nr_samples = 0; | |
448 | l->max_samples = 1024; | |
449 | l->log = malloc(l->max_samples * sizeof(struct io_sample)); | |
450 | *log = l; | |
451 | } | |
452 | ||
bb3884d8 | 453 | void __finish_log(struct io_log *log, const char *name) |
8914a9d8 | 454 | { |
8914a9d8 | 455 | unsigned int i; |
bb3884d8 | 456 | FILE *f; |
8914a9d8 | 457 | |
c12f6dab | 458 | f = fopen(name, "a"); |
8914a9d8 JA |
459 | if (!f) { |
460 | perror("fopen log"); | |
461 | return; | |
462 | } | |
463 | ||
5ec10eaa JA |
464 | for (i = 0; i < log->nr_samples; i++) { |
465 | fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, | |
466 | log->log[i].ddir); | |
467 | } | |
8914a9d8 JA |
468 | |
469 | fclose(f); | |
470 | free(log->log); | |
471 | free(log); | |
472 | } | |
bb3884d8 | 473 | |
e3cedca7 JA |
474 | void finish_log_named(struct thread_data *td, struct io_log *log, |
475 | const char *prefix, const char *postfix) | |
bb3884d8 | 476 | { |
748b23a3 | 477 | char file_name[256], *p; |
bb3884d8 | 478 | |
e3cedca7 | 479 | snprintf(file_name, 200, "%s_%s.log", prefix, postfix); |
748b23a3 JA |
480 | p = basename(file_name); |
481 | __finish_log(log, p); | |
bb3884d8 | 482 | } |
e3cedca7 JA |
483 | |
484 | void finish_log(struct thread_data *td, struct io_log *log, const char *name) | |
485 | { | |
486 | finish_log_named(td, log, td->o.name, name); | |
487 | } |