blob: 6604c1c8ac9295877e2f2a5b95ef2d54f09b21da [file] [log] [blame]
Jens Axboef29b25a2007-07-23 08:56:43 +02001/*
2 * Code related to writing an iolog of what a thread is doing, and to
3 * later read that back and replay
4 */
Jens Axboe3c39a372006-06-06 20:56:12 +02005#include <stdio.h>
6#include <stdlib.h>
Jens Axboe5921e802008-05-30 15:02:38 +02007#include <libgen.h>
Jens Axboef29b25a2007-07-23 08:56:43 +02008#include <assert.h>
Jens Axboe01743ee2008-06-02 12:19:19 +02009#include "flist.h"
Jens Axboe3c39a372006-06-06 20:56:12 +020010#include "fio.h"
11
Jens Axboef29b25a2007-07-23 08:56:43 +020012static const char iolog_ver2[] = "fio version 2 iolog";
13
Jens Axboe691c8fb2008-03-07 14:26:26 +010014void queue_io_piece(struct thread_data *td, struct io_piece *ipo)
15{
Jens Axboe01743ee2008-06-02 12:19:19 +020016 flist_add_tail(&ipo->list, &td->io_log_list);
Jens Axboe691c8fb2008-03-07 14:26:26 +010017 td->total_io_size += ipo->len;
18}
19
Jens Axboef29b25a2007-07-23 08:56:43 +020020void log_io_u(struct thread_data *td, struct io_u *io_u)
Jens Axboe3c39a372006-06-06 20:56:12 +020021{
Jens Axboef29b25a2007-07-23 08:56:43 +020022 const char *act[] = { "read", "write", "sync" };
23
24 assert(io_u->ddir < 3);
25
26 if (!td->o.write_iolog_file)
27 return;
28
Jens Axboe5ec10ea2008-03-06 15:42:00 +010029 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);
Jens Axboef29b25a2007-07-23 08:56:43 +020032}
33
34void 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
Jens Axboe393ca7e2008-05-15 09:17:42 +020044
45 /*
46 * this happens on the pre-open/close done before the job starts
47 */
48 if (!td->iolog_f)
49 return;
50
Jens Axboef29b25a2007-07-23 08:56:43 +020051 fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]);
Jens Axboe3c39a372006-06-06 20:56:12 +020052}
53
Jens Axboea61edde2007-05-15 14:29:58 +020054static 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
Jens Axboef7182732008-03-10 13:57:58 +010072static 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
Jens Axboe3c39a372006-06-06 20:56:12 +0200108int read_iolog_get(struct thread_data *td, struct io_u *io_u)
109{
110 struct io_piece *ipo;
111
Jens Axboe01743ee2008-06-02 12:19:19 +0200112 while (!flist_empty(&td->io_log_list)) {
Jens Axboef7182732008-03-10 13:57:58 +0100113 int ret;
114
Jens Axboe01743ee2008-06-02 12:19:19 +0200115 ipo = flist_entry(td->io_log_list.next, struct io_piece, list);
116 flist_del(&ipo->list);
Jens Axboea61edde2007-05-15 14:29:58 +0200117
Jens Axboef7182732008-03-10 13:57:58 +0100118 ret = ipo_special(td, ipo);
119 if (ret < 0) {
120 free(ipo);
121 break;
122 } else if (ret > 0) {
123 free(ipo);
124 continue;
Jens Axboef29b25a2007-07-23 08:56:43 +0200125 }
126
Jens Axboe429f6672007-07-23 10:38:43 +0200127 io_u->offset = ipo->offset;
128 io_u->buflen = ipo->len;
129 io_u->ddir = ipo->ddir;
Jens Axboe126d65c2008-03-01 18:04:31 +0100130 io_u->file = td->files[ipo->fileno];
Jens Axboe429f6672007-07-23 10:38:43 +0200131 get_file(io_u->file);
132
Jens Axboeee56ad52008-02-01 10:30:20 +0100133 dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset,
134 io_u->buflen, io_u->file->file_name);
135
Jens Axboea61edde2007-05-15 14:29:58 +0200136 if (ipo->delay)
137 iolog_delay(td, ipo->delay);
138
Jens Axboe3c39a372006-06-06 20:56:12 +0200139 free(ipo);
140 return 0;
141 }
142
Jens Axboe20e354e2007-07-23 14:36:16 +0200143 td->done = 1;
Jens Axboe3c39a372006-06-06 20:56:12 +0200144 return 1;
145}
146
147void prune_io_piece_log(struct thread_data *td)
148{
149 struct io_piece *ipo;
Jens Axboe4b878982007-03-26 09:32:22 +0200150 struct rb_node *n;
Jens Axboe3c39a372006-06-06 20:56:12 +0200151
Jens Axboe4b878982007-03-26 09:32:22 +0200152 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);
Jens Axboe3c39a372006-06-06 20:56:12 +0200155 free(ipo);
156 }
Jens Axboe8ce9cd32008-02-21 09:52:35 +0100157
Jens Axboe01743ee2008-06-02 12:19:19 +0200158 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);
Jens Axboe8ce9cd32008-02-21 09:52:35 +0100161 free(ipo);
162 }
Jens Axboe3c39a372006-06-06 20:56:12 +0200163}
164
165/*
Jens Axboe34403fb2007-03-02 21:43:25 +0100166 * log a successful write, so we can unwind the log for verify
Jens Axboe3c39a372006-06-06 20:56:12 +0200167 */
168void log_io_piece(struct thread_data *td, struct io_u *io_u)
169{
Jens Axboe8de8f042007-03-27 10:36:12 +0200170 struct rb_node **p, *parent;
Jens Axboe4b878982007-03-26 09:32:22 +0200171 struct io_piece *ipo, *__ipo;
Jens Axboe3c39a372006-06-06 20:56:12 +0200172
Jens Axboe4b878982007-03-26 09:32:22 +0200173 ipo = malloc(sizeof(struct io_piece));
Jens Axboe53cdc682006-10-18 11:50:58 +0200174 ipo->file = io_u->file;
Jens Axboe3c39a372006-06-06 20:56:12 +0200175 ipo->offset = io_u->offset;
176 ipo->len = io_u->buflen;
177
178 /*
Jens Axboe8de8f042007-03-27 10:36:12 +0200179 * 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.
Jens Axboe83472392009-02-19 21:32:12 +0100186 *
187 * One exception is if we don't have a random map AND we are doing
188 * verifies, in that case we need to check for duplicate blocks and
189 * drop the old one, which we rely on the rb insert/lookup for
190 * handling.
Jens Axboe8de8f042007-03-27 10:36:12 +0200191 */
Jens Axboe83472392009-02-19 21:32:12 +0100192 if ((!td_random(td) || !td->o.overwrite) &&
193 (file_randommap(td, ipo->file) || td->o.verify == VERIFY_NONE)) {
Jens Axboe01743ee2008-06-02 12:19:19 +0200194 INIT_FLIST_HEAD(&ipo->list);
195 flist_add_tail(&ipo->list, &td->io_hist_list);
Jens Axboe8de8f042007-03-27 10:36:12 +0200196 return;
197 }
198
199 RB_CLEAR_NODE(&ipo->rb_node);
Jens Axboe8de8f042007-03-27 10:36:12 +0200200
201 /*
Jens Axboe4b878982007-03-26 09:32:22 +0200202 * Sort the entry into the verification list
Jens Axboe3c39a372006-06-06 20:56:12 +0200203 */
Jens Axboe83472392009-02-19 21:32:12 +0100204restart:
205 p = &td->io_hist_tree.rb_node;
206 parent = NULL;
Jens Axboe4b878982007-03-26 09:32:22 +0200207 while (*p) {
208 parent = *p;
Jens Axboe3c39a372006-06-06 20:56:12 +0200209
Jens Axboe4b878982007-03-26 09:32:22 +0200210 __ipo = rb_entry(parent, struct io_piece, rb_node);
Jens Axboe83472392009-02-19 21:32:12 +0100211 if (ipo->offset < __ipo->offset)
Jens Axboe4b878982007-03-26 09:32:22 +0200212 p = &(*p)->rb_left;
Jens Axboe83472392009-02-19 21:32:12 +0100213 else if (ipo->offset > __ipo->offset)
Jens Axboebb5d7d02007-03-27 10:21:25 +0200214 p = &(*p)->rb_right;
Jens Axboe83472392009-02-19 21:32:12 +0100215 else {
216 assert(ipo->len == __ipo->len);
217 rb_erase(parent, &td->io_hist_tree);
218 goto restart;
219 }
Jens Axboe3c39a372006-06-06 20:56:12 +0200220 }
221
Jens Axboe4b878982007-03-26 09:32:22 +0200222 rb_link_node(&ipo->rb_node, parent, p);
223 rb_insert_color(&ipo->rb_node, &td->io_hist_tree);
Jens Axboe3c39a372006-06-06 20:56:12 +0200224}
225
226void write_iolog_close(struct thread_data *td)
227{
228 fflush(td->iolog_f);
229 fclose(td->iolog_f);
230 free(td->iolog_buf);
Jens Axboef29b25a2007-07-23 08:56:43 +0200231 td->iolog_f = NULL;
232 td->iolog_buf = NULL;
Jens Axboe3c39a372006-06-06 20:56:12 +0200233}
234
Jens Axboefb71fbd2006-10-20 09:15:46 +0200235/*
Jens Axboef29b25a2007-07-23 08:56:43 +0200236 * Read version 2 iolog data. It is enhanced to include per-file logging,
237 * syncs, etc.
Jens Axboefb71fbd2006-10-20 09:15:46 +0200238 */
Jens Axboef29b25a2007-07-23 08:56:43 +0200239static int read_iolog2(struct thread_data *td, FILE *f)
240{
241 unsigned long long offset;
242 unsigned int bytes;
Jens Axboe53fa9b62007-07-23 11:25:39 +0200243 int reads, writes, fileno = 0, file_action = 0; /* stupid gcc */
Jens Axboef29b25a2007-07-23 08:56:43 +0200244 char *fname, *act;
245 char *str, *p;
Jens Axboe53fa9b62007-07-23 11:25:39 +0200246 enum fio_ddir rw;
Jens Axboef29b25a2007-07-23 08:56:43 +0200247
248 free_release_files(td);
249
250 /*
251 * Read in the read iolog and store it, reuse the infrastructure
252 * for doing verifications.
253 */
254 str = malloc(4096);
255 fname = malloc(256+16);
256 act = malloc(256+16);
257
258 reads = writes = 0;
259 while ((p = fgets(str, 4096, f)) != NULL) {
260 struct io_piece *ipo;
261 int r;
262
Jens Axboe5ec10ea2008-03-06 15:42:00 +0100263 r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset,
264 &bytes);
Jens Axboef29b25a2007-07-23 08:56:43 +0200265 if (r == 4) {
266 /*
267 * Check action first
268 */
269 if (!strcmp(act, "read"))
270 rw = DDIR_READ;
271 else if (!strcmp(act, "write"))
272 rw = DDIR_WRITE;
273 else if (!strcmp(act, "sync"))
274 rw = DDIR_SYNC;
275 else {
Jens Axboe5ec10ea2008-03-06 15:42:00 +0100276 log_err("fio: bad iolog file action: %s\n",
277 act);
Jens Axboef29b25a2007-07-23 08:56:43 +0200278 continue;
279 }
280 } else if (r == 2) {
281 rw = DDIR_INVAL;
282 if (!strcmp(act, "add")) {
283 td->o.nr_files++;
284 fileno = add_file(td, fname);
285 file_action = FIO_LOG_ADD_FILE;
286 continue;
287 } else if (!strcmp(act, "open")) {
288 fileno = get_fileno(td, fname);
289 file_action = FIO_LOG_OPEN_FILE;
290 } else if (!strcmp(act, "close")) {
291 fileno = get_fileno(td, fname);
292 file_action = FIO_LOG_CLOSE_FILE;
293 } else {
Jens Axboe5ec10ea2008-03-06 15:42:00 +0100294 log_err("fio: bad iolog file action: %s\n",
295 act);
Jens Axboef29b25a2007-07-23 08:56:43 +0200296 continue;
297 }
298 } else {
299 log_err("bad iolog2: %s", p);
300 continue;
301 }
Jens Axboe5ec10ea2008-03-06 15:42:00 +0100302
Jens Axboef29b25a2007-07-23 08:56:43 +0200303 if (rw == DDIR_READ)
304 reads++;
Jens Axboe4241ea82007-09-12 08:18:36 +0200305 else if (rw == DDIR_WRITE) {
Jens Axboe4241ea82007-09-12 08:18:36 +0200306 /*
307 * Don't add a write for ro mode
308 */
309 if (read_only)
310 continue;
Jens Axboeed4aa702008-03-07 13:39:59 +0100311 writes++;
Jens Axboe4241ea82007-09-12 08:18:36 +0200312 } else if (rw != DDIR_SYNC && rw != DDIR_INVAL) {
Jens Axboef29b25a2007-07-23 08:56:43 +0200313 log_err("bad ddir: %d\n", rw);
314 continue;
315 }
316
317 /*
318 * Make note of file
319 */
320 ipo = malloc(sizeof(*ipo));
321 memset(ipo, 0, sizeof(*ipo));
Jens Axboe01743ee2008-06-02 12:19:19 +0200322 INIT_FLIST_HEAD(&ipo->list);
Jens Axboef29b25a2007-07-23 08:56:43 +0200323 ipo->offset = offset;
324 ipo->len = bytes;
Jens Axboe53fa9b62007-07-23 11:25:39 +0200325 ipo->ddir = rw;
Jens Axboef29b25a2007-07-23 08:56:43 +0200326 if (bytes > td->o.max_bs[rw])
327 td->o.max_bs[rw] = bytes;
328 if (rw == DDIR_INVAL) {
329 ipo->fileno = fileno;
330 ipo->file_action = file_action;
331 }
Jens Axboe691c8fb2008-03-07 14:26:26 +0100332 queue_io_piece(td, ipo);
Jens Axboef29b25a2007-07-23 08:56:43 +0200333 }
334
335 free(str);
336 free(act);
337 free(fname);
338
Jens Axboe4241ea82007-09-12 08:18:36 +0200339 if (writes && read_only) {
Jens Axboe5ec10ea2008-03-06 15:42:00 +0100340 log_err("fio: <%s> skips replay of %d writes due to"
341 " read-only\n", td->o.name, writes);
Jens Axboe4241ea82007-09-12 08:18:36 +0200342 writes = 0;
343 }
344
Jens Axboef29b25a2007-07-23 08:56:43 +0200345 if (!reads && !writes)
346 return 1;
347 else if (reads && !writes)
348 td->o.td_ddir = TD_DDIR_READ;
349 else if (!reads && writes)
350 td->o.td_ddir = TD_DDIR_WRITE;
351 else
352 td->o.td_ddir = TD_DDIR_RW;
353
354 return 0;
355}
356
357/*
Jens Axboef29b25a2007-07-23 08:56:43 +0200358 * open iolog, check version, and call appropriate parser
359 */
360static int init_iolog_read(struct thread_data *td)
361{
362 char buffer[256], *p;
363 FILE *f;
364 int ret;
365
366 f = fopen(td->o.read_iolog_file, "r");
367 if (!f) {
368 perror("fopen read iolog");
369 return 1;
370 }
371
372 p = fgets(buffer, sizeof(buffer), f);
373 if (!p) {
374 td_verror(td, errno, "iolog read");
375 log_err("fio: unable to read iolog\n");
376 return 1;
377 }
378
379 /*
380 * version 2 of the iolog stores a specific string as the
381 * first line, check for that
382 */
383 if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2)))
384 ret = read_iolog2(td, f);
385 else {
Jens Axboeaec2de22008-04-24 12:44:42 +0200386 log_err("fio: iolog version 1 is no longer supported\n");
387 ret = 1;
Jens Axboef29b25a2007-07-23 08:56:43 +0200388 }
389
390 fclose(f);
391 return ret;
392}
393
394/*
Jens Axboefb71fbd2006-10-20 09:15:46 +0200395 * Setup a log for storing io patterns.
396 */
397static int init_iolog_write(struct thread_data *td)
398{
Jens Axboef29b25a2007-07-23 08:56:43 +0200399 struct fio_file *ff;
Jens Axboe076efc72006-10-27 11:24:25 +0200400 FILE *f;
Jens Axboef29b25a2007-07-23 08:56:43 +0200401 unsigned int i;
Jens Axboe733ed592007-04-25 14:24:12 +0200402
Jens Axboec12f6da2008-11-20 09:13:04 +0100403 f = fopen(td->o.write_iolog_file, "a");
Jens Axboefb71fbd2006-10-20 09:15:46 +0200404 if (!f) {
405 perror("fopen write iolog");
406 return 1;
407 }
408
409 /*
410 * That's it for writing, setup a log buffer and we're done.
411 */
412 td->iolog_f = f;
413 td->iolog_buf = malloc(8192);
414 setvbuf(f, td->iolog_buf, _IOFBF, 8192);
Jens Axboef29b25a2007-07-23 08:56:43 +0200415
416 /*
417 * write our version line
418 */
419 if (fprintf(f, "%s\n", iolog_ver2) < 0) {
420 perror("iolog init\n");
421 return 1;
422 }
423
424 /*
425 * add all known files
426 */
427 for_each_file(td, ff, i)
428 log_file(td, ff, FIO_LOG_ADD_FILE);
429
Jens Axboefb71fbd2006-10-20 09:15:46 +0200430 return 0;
431}
432
433int init_iolog(struct thread_data *td)
434{
Jens Axboeb4a6a592006-10-20 13:54:47 +0200435 int ret = 0;
Jens Axboefb71fbd2006-10-20 09:15:46 +0200436
Jens Axboeba0fbe12007-03-09 14:34:23 +0100437 if (td->io_ops->flags & FIO_DISKLESSIO)
Jens Axboef48b4672006-10-27 11:30:07 +0200438 return 0;
439
Jens Axboefb7b71a2007-05-15 08:44:04 +0200440 if (td->o.read_iolog_file) {
441 /*
442 * Check if it's a blktrace file and load that if possible.
443 * Otherwise assume it's a normal log file and load that.
444 */
445 if (is_blktrace(td->o.read_iolog_file))
446 ret = load_blktrace(td, td->o.read_iolog_file);
447 else
448 ret = init_iolog_read(td);
449 } else if (td->o.write_iolog_file)
Jens Axboeb4a6a592006-10-20 13:54:47 +0200450 ret = init_iolog_write(td);
451
Jens Axboe1e97cce2006-12-05 11:44:16 +0100452 return ret;
Jens Axboefb71fbd2006-10-20 09:15:46 +0200453}
454
Jens Axboe8914a9d2006-06-07 11:14:56 +0200455void setup_log(struct io_log **log)
456{
457 struct io_log *l = malloc(sizeof(*l));
458
459 l->nr_samples = 0;
460 l->max_samples = 1024;
461 l->log = malloc(l->max_samples * sizeof(struct io_sample));
462 *log = l;
463}
464
Jens Axboebb3884d2007-01-17 17:23:11 +1100465void __finish_log(struct io_log *log, const char *name)
Jens Axboe8914a9d2006-06-07 11:14:56 +0200466{
Jens Axboe8914a9d2006-06-07 11:14:56 +0200467 unsigned int i;
Jens Axboebb3884d2007-01-17 17:23:11 +1100468 FILE *f;
Jens Axboe8914a9d2006-06-07 11:14:56 +0200469
Jens Axboec12f6da2008-11-20 09:13:04 +0100470 f = fopen(name, "a");
Jens Axboe8914a9d2006-06-07 11:14:56 +0200471 if (!f) {
472 perror("fopen log");
473 return;
474 }
475
Jens Axboe5ec10ea2008-03-06 15:42:00 +0100476 for (i = 0; i < log->nr_samples; i++) {
477 fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val,
478 log->log[i].ddir);
479 }
Jens Axboe8914a9d2006-06-07 11:14:56 +0200480
481 fclose(f);
482 free(log->log);
483 free(log);
484}
Jens Axboebb3884d2007-01-17 17:23:11 +1100485
Jens Axboee3cedca2008-11-19 19:57:52 +0100486void finish_log_named(struct thread_data *td, struct io_log *log,
487 const char *prefix, const char *postfix)
Jens Axboebb3884d2007-01-17 17:23:11 +1100488{
Jens Axboe748b23a2008-05-07 14:28:22 +0200489 char file_name[256], *p;
Jens Axboebb3884d2007-01-17 17:23:11 +1100490
Jens Axboee3cedca2008-11-19 19:57:52 +0100491 snprintf(file_name, 200, "%s_%s.log", prefix, postfix);
Jens Axboe748b23a2008-05-07 14:28:22 +0200492 p = basename(file_name);
493 __finish_log(log, p);
Jens Axboebb3884d2007-01-17 17:23:11 +1100494}
Jens Axboee3cedca2008-11-19 19:57:52 +0100495
496void finish_log(struct thread_data *td, struct io_log *log, const char *name)
497{
498 finish_log_named(td, log, td->o.name, name);
499}