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 | ||
691c8fb0 JA |
13 | void queue_io_piece(struct thread_data *td, struct io_piece *ipo) |
14 | { | |
15 | list_add_tail(&ipo->list, &td->io_log_list); | |
16 | td->total_io_size += ipo->len; | |
17 | } | |
18 | ||
f29b25a3 | 19 | void log_io_u(struct thread_data *td, struct io_u *io_u) |
3c39a379 | 20 | { |
f29b25a3 JA |
21 | const char *act[] = { "read", "write", "sync" }; |
22 | ||
23 | assert(io_u->ddir < 3); | |
24 | ||
25 | if (!td->o.write_iolog_file) | |
26 | return; | |
27 | ||
5ec10eaa JA |
28 | fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name, |
29 | act[io_u->ddir], io_u->offset, | |
30 | io_u->buflen); | |
f29b25a3 JA |
31 | } |
32 | ||
33 | void log_file(struct thread_data *td, struct fio_file *f, | |
34 | enum file_log_act what) | |
35 | { | |
36 | const char *act[] = { "add", "open", "close" }; | |
37 | ||
38 | assert(what < 3); | |
39 | ||
40 | if (!td->o.write_iolog_file) | |
41 | return; | |
42 | ||
43 | fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]); | |
3c39a379 JA |
44 | } |
45 | ||
a61eddec JA |
46 | static void iolog_delay(struct thread_data *td, unsigned long delay) |
47 | { | |
48 | unsigned long usec = utime_since_now(&td->last_issue); | |
49 | ||
50 | if (delay < usec) | |
51 | return; | |
52 | ||
53 | delay -= usec; | |
54 | ||
55 | /* | |
56 | * less than 100 usec delay, just regard it as noise | |
57 | */ | |
58 | if (delay < 100) | |
59 | return; | |
60 | ||
61 | usec_sleep(td, delay); | |
62 | } | |
63 | ||
f718273e JA |
64 | static int ipo_special(struct thread_data *td, struct io_piece *ipo) |
65 | { | |
66 | struct fio_file *f; | |
67 | int ret; | |
68 | ||
69 | /* | |
70 | * Not a special ipo | |
71 | */ | |
72 | if (ipo->ddir != DDIR_INVAL) | |
73 | return 0; | |
74 | ||
75 | f = td->files[ipo->fileno]; | |
76 | ||
77 | switch (ipo->file_action) { | |
78 | case FIO_LOG_OPEN_FILE: | |
79 | ret = td_io_open_file(td, f); | |
80 | if (!ret) { | |
81 | free(ipo); | |
82 | break; | |
83 | } | |
84 | td_verror(td, ret, "iolog open file"); | |
85 | return -1; | |
86 | case FIO_LOG_CLOSE_FILE: | |
87 | td_io_close_file(td, f); | |
88 | break; | |
89 | case FIO_LOG_UNLINK_FILE: | |
90 | unlink(f->file_name); | |
91 | break; | |
92 | default: | |
93 | log_err("fio: bad file action %d\n", ipo->file_action); | |
94 | break; | |
95 | } | |
96 | ||
97 | return 1; | |
98 | } | |
99 | ||
3c39a379 JA |
100 | int read_iolog_get(struct thread_data *td, struct io_u *io_u) |
101 | { | |
102 | struct io_piece *ipo; | |
103 | ||
b3f4b4f5 | 104 | while (!list_empty(&td->io_log_list)) { |
f718273e JA |
105 | int ret; |
106 | ||
3c39a379 JA |
107 | ipo = list_entry(td->io_log_list.next, struct io_piece, list); |
108 | list_del(&ipo->list); | |
a61eddec | 109 | |
f718273e JA |
110 | ret = ipo_special(td, ipo); |
111 | if (ret < 0) { | |
112 | free(ipo); | |
113 | break; | |
114 | } else if (ret > 0) { | |
115 | free(ipo); | |
116 | continue; | |
f29b25a3 JA |
117 | } |
118 | ||
429f6675 JA |
119 | io_u->offset = ipo->offset; |
120 | io_u->buflen = ipo->len; | |
121 | io_u->ddir = ipo->ddir; | |
126d65c6 | 122 | io_u->file = td->files[ipo->fileno]; |
429f6675 JA |
123 | get_file(io_u->file); |
124 | ||
ee56ad50 JA |
125 | dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset, |
126 | io_u->buflen, io_u->file->file_name); | |
127 | ||
a61eddec JA |
128 | if (ipo->delay) |
129 | iolog_delay(td, ipo->delay); | |
130 | ||
3c39a379 JA |
131 | free(ipo); |
132 | return 0; | |
133 | } | |
134 | ||
20e354ef | 135 | td->done = 1; |
3c39a379 JA |
136 | return 1; |
137 | } | |
138 | ||
139 | void prune_io_piece_log(struct thread_data *td) | |
140 | { | |
141 | struct io_piece *ipo; | |
4b87898e | 142 | struct rb_node *n; |
3c39a379 | 143 | |
4b87898e JA |
144 | while ((n = rb_first(&td->io_hist_tree)) != NULL) { |
145 | ipo = rb_entry(n, struct io_piece, rb_node); | |
146 | rb_erase(n, &td->io_hist_tree); | |
3c39a379 JA |
147 | free(ipo); |
148 | } | |
8ce9cd3d JA |
149 | |
150 | while (!list_empty(&td->io_hist_list)) { | |
151 | ipo = list_entry(td->io_hist_list.next, struct io_piece, list); | |
152 | list_del(&ipo->list); | |
153 | free(ipo); | |
154 | } | |
3c39a379 JA |
155 | } |
156 | ||
157 | /* | |
34403fb1 | 158 | * log a successful write, so we can unwind the log for verify |
3c39a379 JA |
159 | */ |
160 | void log_io_piece(struct thread_data *td, struct io_u *io_u) | |
161 | { | |
8de8f047 | 162 | struct rb_node **p, *parent; |
4b87898e | 163 | struct io_piece *ipo, *__ipo; |
3c39a379 | 164 | |
4b87898e | 165 | ipo = malloc(sizeof(struct io_piece)); |
53cdc686 | 166 | ipo->file = io_u->file; |
3c39a379 JA |
167 | ipo->offset = io_u->offset; |
168 | ipo->len = io_u->buflen; | |
169 | ||
8de8f047 JA |
170 | /* |
171 | * We don't need to sort the entries, if: | |
172 | * | |
173 | * Sequential writes, or | |
174 | * Random writes that lay out the file as it goes along | |
175 | * | |
176 | * For both these cases, just reading back data in the order we | |
177 | * wrote it out is the fastest. | |
178 | */ | |
9b23c9fb | 179 | if (!td_random(td) || !td->o.overwrite) { |
8de8f047 JA |
180 | INIT_LIST_HEAD(&ipo->list); |
181 | list_add_tail(&ipo->list, &td->io_hist_list); | |
182 | return; | |
183 | } | |
184 | ||
185 | RB_CLEAR_NODE(&ipo->rb_node); | |
186 | p = &td->io_hist_tree.rb_node; | |
187 | parent = NULL; | |
188 | ||
3c39a379 | 189 | /* |
4b87898e | 190 | * Sort the entry into the verification list |
3c39a379 | 191 | */ |
4b87898e JA |
192 | while (*p) { |
193 | parent = *p; | |
194 | ||
195 | __ipo = rb_entry(parent, struct io_piece, rb_node); | |
bb5d7d0b | 196 | if (ipo->offset <= __ipo->offset) |
4b87898e | 197 | p = &(*p)->rb_left; |
4b87898e | 198 | else |
bb5d7d0b | 199 | p = &(*p)->rb_right; |
3c39a379 JA |
200 | } |
201 | ||
4b87898e JA |
202 | rb_link_node(&ipo->rb_node, parent, p); |
203 | rb_insert_color(&ipo->rb_node, &td->io_hist_tree); | |
3c39a379 JA |
204 | } |
205 | ||
206 | void write_iolog_close(struct thread_data *td) | |
207 | { | |
208 | fflush(td->iolog_f); | |
209 | fclose(td->iolog_f); | |
210 | free(td->iolog_buf); | |
f29b25a3 JA |
211 | td->iolog_f = NULL; |
212 | td->iolog_buf = NULL; | |
3c39a379 JA |
213 | } |
214 | ||
fb71fbd7 | 215 | /* |
f29b25a3 JA |
216 | * Read version 2 iolog data. It is enhanced to include per-file logging, |
217 | * syncs, etc. | |
fb71fbd7 | 218 | */ |
f29b25a3 | 219 | static int read_iolog2(struct thread_data *td, FILE *f) |
3c39a379 JA |
220 | { |
221 | unsigned long long offset; | |
222 | unsigned int bytes; | |
53fa9b69 | 223 | int reads, writes, fileno = 0, file_action = 0; /* stupid gcc */ |
f29b25a3 | 224 | char *fname, *act; |
3c39a379 | 225 | char *str, *p; |
53fa9b69 | 226 | enum fio_ddir rw; |
3c39a379 | 227 | |
f29b25a3 JA |
228 | free_release_files(td); |
229 | ||
230 | /* | |
231 | * Read in the read iolog and store it, reuse the infrastructure | |
232 | * for doing verifications. | |
233 | */ | |
234 | str = malloc(4096); | |
235 | fname = malloc(256+16); | |
236 | act = malloc(256+16); | |
237 | ||
238 | reads = writes = 0; | |
239 | while ((p = fgets(str, 4096, f)) != NULL) { | |
240 | struct io_piece *ipo; | |
241 | int r; | |
242 | ||
5ec10eaa JA |
243 | r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset, |
244 | &bytes); | |
f29b25a3 JA |
245 | if (r == 4) { |
246 | /* | |
247 | * Check action first | |
248 | */ | |
249 | if (!strcmp(act, "read")) | |
250 | rw = DDIR_READ; | |
251 | else if (!strcmp(act, "write")) | |
252 | rw = DDIR_WRITE; | |
253 | else if (!strcmp(act, "sync")) | |
254 | rw = DDIR_SYNC; | |
255 | else { | |
5ec10eaa JA |
256 | log_err("fio: bad iolog file action: %s\n", |
257 | act); | |
f29b25a3 JA |
258 | continue; |
259 | } | |
260 | } else if (r == 2) { | |
261 | rw = DDIR_INVAL; | |
262 | if (!strcmp(act, "add")) { | |
263 | td->o.nr_files++; | |
264 | fileno = add_file(td, fname); | |
265 | file_action = FIO_LOG_ADD_FILE; | |
266 | continue; | |
267 | } else if (!strcmp(act, "open")) { | |
268 | fileno = get_fileno(td, fname); | |
269 | file_action = FIO_LOG_OPEN_FILE; | |
270 | } else if (!strcmp(act, "close")) { | |
271 | fileno = get_fileno(td, fname); | |
272 | file_action = FIO_LOG_CLOSE_FILE; | |
273 | } else { | |
5ec10eaa JA |
274 | log_err("fio: bad iolog file action: %s\n", |
275 | act); | |
f29b25a3 JA |
276 | continue; |
277 | } | |
278 | } else { | |
279 | log_err("bad iolog2: %s", p); | |
280 | continue; | |
281 | } | |
5ec10eaa | 282 | |
f29b25a3 JA |
283 | if (rw == DDIR_READ) |
284 | reads++; | |
4241ea8f | 285 | else if (rw == DDIR_WRITE) { |
4241ea8f JA |
286 | /* |
287 | * Don't add a write for ro mode | |
288 | */ | |
289 | if (read_only) | |
290 | continue; | |
ed4aa707 | 291 | writes++; |
4241ea8f | 292 | } else if (rw != DDIR_SYNC && rw != DDIR_INVAL) { |
f29b25a3 JA |
293 | log_err("bad ddir: %d\n", rw); |
294 | continue; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Make note of file | |
299 | */ | |
300 | ipo = malloc(sizeof(*ipo)); | |
301 | memset(ipo, 0, sizeof(*ipo)); | |
302 | INIT_LIST_HEAD(&ipo->list); | |
303 | ipo->offset = offset; | |
304 | ipo->len = bytes; | |
53fa9b69 | 305 | ipo->ddir = rw; |
f29b25a3 JA |
306 | if (bytes > td->o.max_bs[rw]) |
307 | td->o.max_bs[rw] = bytes; | |
308 | if (rw == DDIR_INVAL) { | |
309 | ipo->fileno = fileno; | |
310 | ipo->file_action = file_action; | |
311 | } | |
691c8fb0 | 312 | queue_io_piece(td, ipo); |
3c39a379 JA |
313 | } |
314 | ||
f29b25a3 JA |
315 | free(str); |
316 | free(act); | |
317 | free(fname); | |
318 | ||
4241ea8f | 319 | if (writes && read_only) { |
5ec10eaa JA |
320 | log_err("fio: <%s> skips replay of %d writes due to" |
321 | " read-only\n", td->o.name, writes); | |
4241ea8f JA |
322 | writes = 0; |
323 | } | |
324 | ||
f29b25a3 JA |
325 | if (!reads && !writes) |
326 | return 1; | |
327 | else if (reads && !writes) | |
328 | td->o.td_ddir = TD_DDIR_READ; | |
329 | else if (!reads && writes) | |
330 | td->o.td_ddir = TD_DDIR_WRITE; | |
331 | else | |
332 | td->o.td_ddir = TD_DDIR_RW; | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
fb71fbd7 | 337 | /* |
f29b25a3 | 338 | * open iolog, check version, and call appropriate parser |
fb71fbd7 | 339 | */ |
f29b25a3 | 340 | static int init_iolog_read(struct thread_data *td) |
fb71fbd7 | 341 | { |
f29b25a3 | 342 | char buffer[256], *p; |
076efc7c | 343 | FILE *f; |
f29b25a3 JA |
344 | int ret; |
345 | ||
346 | f = fopen(td->o.read_iolog_file, "r"); | |
347 | if (!f) { | |
348 | perror("fopen read iolog"); | |
349 | return 1; | |
350 | } | |
fb71fbd7 | 351 | |
f29b25a3 JA |
352 | p = fgets(buffer, sizeof(buffer), f); |
353 | if (!p) { | |
354 | td_verror(td, errno, "iolog read"); | |
355 | log_err("fio: unable to read iolog\n"); | |
733ed597 JA |
356 | return 1; |
357 | } | |
358 | ||
f29b25a3 JA |
359 | /* |
360 | * version 2 of the iolog stores a specific string as the | |
361 | * first line, check for that | |
362 | */ | |
363 | if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2))) | |
364 | ret = read_iolog2(td, f); | |
365 | else { | |
aec2de20 JA |
366 | log_err("fio: iolog version 1 is no longer supported\n"); |
367 | ret = 1; | |
f29b25a3 JA |
368 | } |
369 | ||
370 | fclose(f); | |
371 | return ret; | |
372 | } | |
373 | ||
374 | /* | |
375 | * Setup a log for storing io patterns. | |
376 | */ | |
377 | static int init_iolog_write(struct thread_data *td) | |
378 | { | |
379 | struct fio_file *ff; | |
380 | FILE *f; | |
381 | unsigned int i; | |
382 | ||
2dc1bbeb | 383 | f = fopen(td->o.write_iolog_file, "w+"); |
fb71fbd7 JA |
384 | if (!f) { |
385 | perror("fopen write iolog"); | |
386 | return 1; | |
387 | } | |
388 | ||
389 | /* | |
390 | * That's it for writing, setup a log buffer and we're done. | |
391 | */ | |
392 | td->iolog_f = f; | |
393 | td->iolog_buf = malloc(8192); | |
394 | setvbuf(f, td->iolog_buf, _IOFBF, 8192); | |
f29b25a3 JA |
395 | |
396 | /* | |
397 | * write our version line | |
398 | */ | |
399 | if (fprintf(f, "%s\n", iolog_ver2) < 0) { | |
400 | perror("iolog init\n"); | |
401 | return 1; | |
402 | } | |
403 | ||
404 | /* | |
405 | * add all known files | |
406 | */ | |
407 | for_each_file(td, ff, i) | |
408 | log_file(td, ff, FIO_LOG_ADD_FILE); | |
409 | ||
fb71fbd7 JA |
410 | return 0; |
411 | } | |
412 | ||
413 | int init_iolog(struct thread_data *td) | |
414 | { | |
b4a6a59a JA |
415 | int ret = 0; |
416 | ||
ba0fbe10 | 417 | if (td->io_ops->flags & FIO_DISKLESSIO) |
f48b467c JA |
418 | return 0; |
419 | ||
fb7b71a3 JA |
420 | if (td->o.read_iolog_file) { |
421 | /* | |
422 | * Check if it's a blktrace file and load that if possible. | |
423 | * Otherwise assume it's a normal log file and load that. | |
424 | */ | |
425 | if (is_blktrace(td->o.read_iolog_file)) | |
426 | ret = load_blktrace(td, td->o.read_iolog_file); | |
427 | else | |
428 | ret = init_iolog_read(td); | |
429 | } else if (td->o.write_iolog_file) | |
b4a6a59a | 430 | ret = init_iolog_write(td); |
fb71fbd7 | 431 | |
1e97cce9 | 432 | return ret; |
fb71fbd7 JA |
433 | } |
434 | ||
8914a9d8 JA |
435 | void setup_log(struct io_log **log) |
436 | { | |
437 | struct io_log *l = malloc(sizeof(*l)); | |
438 | ||
439 | l->nr_samples = 0; | |
440 | l->max_samples = 1024; | |
441 | l->log = malloc(l->max_samples * sizeof(struct io_sample)); | |
442 | *log = l; | |
443 | } | |
444 | ||
bb3884d8 | 445 | void __finish_log(struct io_log *log, const char *name) |
8914a9d8 | 446 | { |
8914a9d8 | 447 | unsigned int i; |
bb3884d8 | 448 | FILE *f; |
8914a9d8 | 449 | |
bb3884d8 | 450 | f = fopen(name, "w"); |
8914a9d8 JA |
451 | if (!f) { |
452 | perror("fopen log"); | |
453 | return; | |
454 | } | |
455 | ||
5ec10eaa JA |
456 | for (i = 0; i < log->nr_samples; i++) { |
457 | fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, | |
458 | log->log[i].ddir); | |
459 | } | |
8914a9d8 JA |
460 | |
461 | fclose(f); | |
462 | free(log->log); | |
463 | free(log); | |
464 | } | |
bb3884d8 JA |
465 | |
466 | void finish_log(struct thread_data *td, struct io_log *log, const char *name) | |
467 | { | |
468 | char file_name[256]; | |
469 | ||
84f83179 | 470 | snprintf(file_name, 200, "%s_%s.log", td->o.name, name); |
bb3884d8 JA |
471 | __finish_log(log, file_name); |
472 | } |