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