Commit | Line | Data |
---|---|---|
fb7b71a3 JA |
1 | /* |
2 | * blktrace support code for fio | |
3 | */ | |
4 | #include <stdio.h> | |
5 | #include <stdlib.h> | |
87a48ada | 6 | #include <unistd.h> |
5ab088aa | 7 | #include <errno.h> |
8c1fdf04 | 8 | |
01743ee1 | 9 | #include "flist.h" |
fb7b71a3 | 10 | #include "fio.h" |
a3e59412 | 11 | #include "blktrace.h" |
fb7b71a3 | 12 | #include "blktrace_api.h" |
984f30c9 | 13 | #include "oslib/linux-dev-lookup.h" |
fb7b71a3 | 14 | |
8c1fdf04 JA |
15 | /* |
16 | * Just discard the pdu by seeking past it. | |
17 | */ | |
5ab088aa | 18 | static int discard_pdu(FILE* f, struct blk_io_trace *t) |
fb7b71a3 JA |
19 | { |
20 | if (t->pdu_len == 0) | |
21 | return 0; | |
22 | ||
bd6f78b2 | 23 | dprint(FD_BLKTRACE, "discard pdu len %u\n", t->pdu_len); |
5ab088aa LS |
24 | if (fseek(f, t->pdu_len, SEEK_CUR) < 0) |
25 | return -errno; | |
26 | ||
27 | return t->pdu_len; | |
fb7b71a3 JA |
28 | } |
29 | ||
8c1fdf04 JA |
30 | /* |
31 | * Check if this is a blktrace binary data file. We read a single trace | |
32 | * into memory and check for the magic signature. | |
33 | */ | |
b153f94a | 34 | bool is_blktrace(const char *filename, int *need_swap) |
fb7b71a3 JA |
35 | { |
36 | struct blk_io_trace t; | |
37 | int fd, ret; | |
38 | ||
39 | fd = open(filename, O_RDONLY); | |
4dced407 | 40 | if (fd < 0) |
b153f94a | 41 | return false; |
fb7b71a3 JA |
42 | |
43 | ret = read(fd, &t, sizeof(t)); | |
44 | close(fd); | |
45 | ||
46 | if (ret < 0) { | |
47 | perror("read blktrace"); | |
b153f94a | 48 | return false; |
fb7b71a3 JA |
49 | } else if (ret != sizeof(t)) { |
50 | log_err("fio: short read on blktrace file\n"); | |
b153f94a | 51 | return false; |
fb7b71a3 JA |
52 | } |
53 | ||
d95b34a6 JA |
54 | if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { |
55 | *need_swap = 0; | |
b153f94a | 56 | return true; |
d95b34a6 JA |
57 | } |
58 | ||
59 | /* | |
60 | * Maybe it needs to be endian swapped... | |
61 | */ | |
62 | t.magic = fio_swap32(t.magic); | |
63 | if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { | |
64 | *need_swap = 1; | |
b153f94a | 65 | return true; |
d95b34a6 | 66 | } |
fb7b71a3 | 67 | |
b153f94a | 68 | return false; |
fb7b71a3 JA |
69 | } |
70 | ||
c69aa91f JA |
71 | #define FMINORBITS 20 |
72 | #define FMINORMASK ((1U << FMINORBITS) - 1) | |
73 | #define FMAJOR(dev) ((unsigned int) ((dev) >> FMINORBITS)) | |
74 | #define FMINOR(dev) ((unsigned int) ((dev) & FMINORMASK)) | |
eeb9c2aa | 75 | |
89ac1d48 | 76 | static void trace_add_open_close_event(struct thread_data *td, int fileno, enum file_log_act action) |
691c8fb0 JA |
77 | { |
78 | struct io_piece *ipo; | |
79 | ||
80 | ipo = calloc(1, sizeof(*ipo)); | |
0d29de83 | 81 | init_ipo(ipo); |
691c8fb0 JA |
82 | |
83 | ipo->ddir = DDIR_INVAL; | |
84 | ipo->fileno = fileno; | |
89ac1d48 | 85 | ipo->file_action = action; |
01743ee1 | 86 | flist_add_tail(&ipo->list, &td->io_log_list); |
691c8fb0 JA |
87 | } |
88 | ||
6aaf98e9 | 89 | static int trace_add_file(struct thread_data *td, __u32 device) |
5e6c2067 | 90 | { |
6aaf98e9 | 91 | static unsigned int last_maj, last_min, last_fileno; |
c69aa91f JA |
92 | unsigned int maj = FMAJOR(device); |
93 | unsigned int min = FMINOR(device); | |
5e6c2067 | 94 | struct fio_file *f; |
26e616d0 | 95 | char dev[256]; |
6aaf98e9 | 96 | unsigned int i; |
5e6c2067 | 97 | |
6aaf98e9 | 98 | if (last_maj == maj && last_min == min) |
89ac1d48 | 99 | return last_fileno; |
5e6c2067 JA |
100 | |
101 | last_maj = maj; | |
102 | last_min = min; | |
103 | ||
104 | /* | |
105 | * check for this file in our list | |
106 | */ | |
6aaf98e9 | 107 | for_each_file(td, f, i) |
89ac1d48 SL |
108 | if (f->major == maj && f->minor == min) { |
109 | last_fileno = f->fileno; | |
6aaf98e9 | 110 | return last_fileno; |
89ac1d48 | 111 | } |
5e6c2067 JA |
112 | |
113 | strcpy(dev, "/dev"); | |
40bafa33 | 114 | if (blktrace_lookup_device(td->o.replay_redirect, dev, maj, min)) { |
691c8fb0 JA |
115 | int fileno; |
116 | ||
40bafa33 JA |
117 | if (td->o.replay_redirect) |
118 | dprint(FD_BLKTRACE, "device lookup: %d/%d\n overridden" | |
119 | " with: %s\n", maj, min, | |
120 | td->o.replay_redirect); | |
121 | else | |
122 | dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj, min); | |
123 | ||
bd6f78b2 | 124 | dprint(FD_BLKTRACE, "add devices %s\n", dev); |
49ffb4a2 | 125 | fileno = add_file_exclusive(td, dev); |
b53f2c54 | 126 | td->o.open_files++; |
5903e7b7 JA |
127 | td->files[fileno]->major = maj; |
128 | td->files[fileno]->minor = min; | |
89ac1d48 SL |
129 | trace_add_open_close_event(td, fileno, FIO_LOG_OPEN_FILE); |
130 | last_fileno = fileno; | |
bd6f78b2 | 131 | } |
f01b34ae | 132 | |
89ac1d48 | 133 | return last_fileno; |
5e6c2067 JA |
134 | } |
135 | ||
0c63576e JA |
136 | static void t_bytes_align(struct thread_options *o, struct blk_io_trace *t) |
137 | { | |
138 | if (!o->replay_align) | |
139 | return; | |
140 | ||
141 | t->bytes = (t->bytes + o->replay_align - 1) & ~(o->replay_align - 1); | |
142 | } | |
143 | ||
8c1fdf04 JA |
144 | /* |
145 | * Store blk_io_trace data in an ipo for later retrieval. | |
146 | */ | |
fdefd987 | 147 | static void store_ipo(struct thread_data *td, unsigned long long offset, |
89ac1d48 | 148 | unsigned int bytes, int rw, unsigned long long ttime, |
6aaf98e9 | 149 | int fileno) |
fdefd987 | 150 | { |
8812d7f2 | 151 | struct io_piece *ipo; |
fdefd987 | 152 | |
8812d7f2 | 153 | ipo = calloc(1, sizeof(*ipo)); |
0d29de83 JA |
154 | init_ipo(ipo); |
155 | ||
6aaf98e9 | 156 | ipo->offset = offset * 512; |
0c63576e JA |
157 | if (td->o.replay_scale) |
158 | ipo->offset = ipo->offset / td->o.replay_scale; | |
a79f17bf | 159 | ipo_bytes_align(td->o.replay_align, ipo); |
fdefd987 | 160 | ipo->len = bytes; |
8c1fdf04 | 161 | ipo->delay = ttime / 1000; |
fdefd987 JA |
162 | if (rw) |
163 | ipo->ddir = DDIR_WRITE; | |
164 | else | |
165 | ipo->ddir = DDIR_READ; | |
89ac1d48 | 166 | ipo->fileno = fileno; |
fdefd987 | 167 | |
bd6f78b2 JA |
168 | dprint(FD_BLKTRACE, "store ddir=%d, off=%llu, len=%lu, delay=%lu\n", |
169 | ipo->ddir, ipo->offset, | |
170 | ipo->len, ipo->delay); | |
691c8fb0 | 171 | queue_io_piece(td, ipo); |
fdefd987 JA |
172 | } |
173 | ||
0b9d69ec | 174 | static void handle_trace_notify(struct blk_io_trace *t) |
cd991b9e | 175 | { |
691c8fb0 JA |
176 | switch (t->action) { |
177 | case BLK_TN_PROCESS: | |
24653680 | 178 | dprint(FD_BLKTRACE, "got process notify: %x, %d\n", |
d95b34a6 | 179 | t->action, t->pid); |
691c8fb0 JA |
180 | break; |
181 | case BLK_TN_TIMESTAMP: | |
24653680 | 182 | dprint(FD_BLKTRACE, "got timestamp notify: %x, %d\n", |
d95b34a6 | 183 | t->action, t->pid); |
691c8fb0 | 184 | break; |
ff58fced JA |
185 | case BLK_TN_MESSAGE: |
186 | break; | |
691c8fb0 JA |
187 | default: |
188 | dprint(FD_BLKTRACE, "unknown trace act %x\n", t->action); | |
189 | break; | |
190 | } | |
191 | } | |
5b3023b8 | 192 | |
24653680 JA |
193 | static void handle_trace_discard(struct thread_data *td, |
194 | struct blk_io_trace *t, | |
195 | unsigned long long ttime, | |
6aaf98e9 | 196 | unsigned long *ios, unsigned int *bs) |
ff58fced | 197 | { |
8812d7f2 | 198 | struct io_piece *ipo; |
89ac1d48 | 199 | int fileno; |
ff58fced | 200 | |
d7235efb JA |
201 | if (td->o.replay_skip & (1u << DDIR_TRIM)) |
202 | return; | |
203 | ||
8812d7f2 | 204 | ipo = calloc(1, sizeof(*ipo)); |
0d29de83 | 205 | init_ipo(ipo); |
6aaf98e9 | 206 | fileno = trace_add_file(td, t->device); |
ff58fced | 207 | |
24653680 | 208 | ios[DDIR_TRIM]++; |
6aaf98e9 DZ |
209 | if (t->bytes > bs[DDIR_TRIM]) |
210 | bs[DDIR_TRIM] = t->bytes; | |
24653680 | 211 | |
ff58fced JA |
212 | td->o.size += t->bytes; |
213 | ||
ff58fced JA |
214 | INIT_FLIST_HEAD(&ipo->list); |
215 | ||
6aaf98e9 | 216 | ipo->offset = t->sector * 512; |
0c63576e JA |
217 | if (td->o.replay_scale) |
218 | ipo->offset = ipo->offset / td->o.replay_scale; | |
a79f17bf | 219 | ipo_bytes_align(td->o.replay_align, ipo); |
ff58fced JA |
220 | ipo->len = t->bytes; |
221 | ipo->delay = ttime / 1000; | |
222 | ipo->ddir = DDIR_TRIM; | |
89ac1d48 | 223 | ipo->fileno = fileno; |
ff58fced JA |
224 | |
225 | dprint(FD_BLKTRACE, "store discard, off=%llu, len=%lu, delay=%lu\n", | |
226 | ipo->offset, ipo->len, | |
227 | ipo->delay); | |
228 | queue_io_piece(td, ipo); | |
229 | } | |
230 | ||
19a8064e JA |
231 | static void dump_trace(struct blk_io_trace *t) |
232 | { | |
233 | log_err("blktrace: ignoring zero byte trace: action=%x\n", t->action); | |
234 | } | |
235 | ||
691c8fb0 JA |
236 | static void handle_trace_fs(struct thread_data *td, struct blk_io_trace *t, |
237 | unsigned long long ttime, unsigned long *ios, | |
6aaf98e9 | 238 | unsigned int *bs) |
691c8fb0 JA |
239 | { |
240 | int rw; | |
89ac1d48 | 241 | int fileno; |
5b3023b8 | 242 | |
6aaf98e9 | 243 | fileno = trace_add_file(td, t->device); |
5b3023b8 JA |
244 | |
245 | rw = (t->action & BLK_TC_ACT(BLK_TC_WRITE)) != 0; | |
246 | ||
d7235efb JA |
247 | if (rw) { |
248 | if (td->o.replay_skip & (1u << DDIR_WRITE)) | |
249 | return; | |
250 | } else { | |
251 | if (td->o.replay_skip & (1u << DDIR_READ)) | |
252 | return; | |
253 | } | |
254 | ||
19a8064e JA |
255 | if (!t->bytes) { |
256 | if (!fio_did_warn(FIO_WARN_BTRACE_ZERO)) | |
257 | dump_trace(t); | |
258 | return; | |
259 | } | |
c1f22c21 | 260 | |
6aaf98e9 DZ |
261 | if (t->bytes > bs[rw]) |
262 | bs[rw] = t->bytes; | |
5b3023b8 JA |
263 | |
264 | ios[rw]++; | |
265 | td->o.size += t->bytes; | |
6aaf98e9 | 266 | store_ipo(td, t->sector, t->bytes, rw, ttime, fileno); |
cd991b9e JA |
267 | } |
268 | ||
65c42cc8 | 269 | static void handle_trace_flush(struct thread_data *td, struct blk_io_trace *t, |
811f5421 | 270 | unsigned long long ttime, unsigned long *ios) |
65c42cc8 JA |
271 | { |
272 | struct io_piece *ipo; | |
65c42cc8 JA |
273 | int fileno; |
274 | ||
d7235efb JA |
275 | if (td->o.replay_skip & (1u << DDIR_SYNC)) |
276 | return; | |
277 | ||
65c42cc8 JA |
278 | ipo = calloc(1, sizeof(*ipo)); |
279 | init_ipo(ipo); | |
6aaf98e9 | 280 | fileno = trace_add_file(td, t->device); |
65c42cc8 JA |
281 | |
282 | ipo->delay = ttime / 1000; | |
283 | ipo->ddir = DDIR_SYNC; | |
284 | ipo->fileno = fileno; | |
285 | ||
811f5421 | 286 | ios[DDIR_SYNC]++; |
65c42cc8 JA |
287 | dprint(FD_BLKTRACE, "store flush delay=%lu\n", ipo->delay); |
288 | queue_io_piece(td, ipo); | |
289 | } | |
290 | ||
691c8fb0 JA |
291 | /* |
292 | * We only care for queue traces, most of the others are side effects | |
293 | * due to internal workings of the block layer. | |
294 | */ | |
295 | static void handle_trace(struct thread_data *td, struct blk_io_trace *t, | |
24653680 | 296 | unsigned long *ios, unsigned int *bs) |
691c8fb0 | 297 | { |
24653680 | 298 | static unsigned long long last_ttime; |
0c63576e | 299 | unsigned long long delay = 0; |
24653680 | 300 | |
691c8fb0 JA |
301 | if ((t->action & 0xffff) != __BLK_TA_QUEUE) |
302 | return; | |
24653680 JA |
303 | |
304 | if (!(t->action & BLK_TC_ACT(BLK_TC_NOTIFY))) { | |
6dd7fa77 | 305 | if (!last_ttime || td->o.no_stall) |
24653680 | 306 | delay = 0; |
6dd7fa77 | 307 | else if (td->o.replay_time_scale == 100) |
24653680 | 308 | delay = t->time - last_ttime; |
6dd7fa77 JA |
309 | else { |
310 | double tmp = t->time - last_ttime; | |
311 | double scale; | |
312 | ||
313 | scale = (double) 100.0 / (double) td->o.replay_time_scale; | |
314 | tmp *= scale; | |
315 | delay = tmp; | |
24653680 | 316 | } |
6dd7fa77 | 317 | last_ttime = t->time; |
24653680 | 318 | } |
691c8fb0 | 319 | |
0c63576e JA |
320 | t_bytes_align(&td->o, t); |
321 | ||
691c8fb0 | 322 | if (t->action & BLK_TC_ACT(BLK_TC_NOTIFY)) |
aec2de20 | 323 | handle_trace_notify(t); |
ff58fced | 324 | else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD)) |
24653680 | 325 | handle_trace_discard(td, t, delay, ios, bs); |
65c42cc8 | 326 | else if (t->action & BLK_TC_ACT(BLK_TC_FLUSH)) |
811f5421 | 327 | handle_trace_flush(td, t, delay, ios); |
691c8fb0 | 328 | else |
24653680 | 329 | handle_trace_fs(td, t, delay, ios, bs); |
691c8fb0 JA |
330 | } |
331 | ||
d95b34a6 JA |
332 | static void byteswap_trace(struct blk_io_trace *t) |
333 | { | |
334 | t->magic = fio_swap32(t->magic); | |
335 | t->sequence = fio_swap32(t->sequence); | |
336 | t->time = fio_swap64(t->time); | |
337 | t->sector = fio_swap64(t->sector); | |
338 | t->bytes = fio_swap32(t->bytes); | |
339 | t->action = fio_swap32(t->action); | |
340 | t->pid = fio_swap32(t->pid); | |
341 | t->device = fio_swap32(t->device); | |
342 | t->cpu = fio_swap32(t->cpu); | |
343 | t->error = fio_swap16(t->error); | |
344 | t->pdu_len = fio_swap16(t->pdu_len); | |
345 | } | |
346 | ||
b153f94a | 347 | static bool t_is_write(struct blk_io_trace *t) |
24653680 JA |
348 | { |
349 | return (t->action & BLK_TC_ACT(BLK_TC_WRITE | BLK_TC_DISCARD)) != 0; | |
350 | } | |
351 | ||
a6eaf6c9 JA |
352 | static enum fio_ddir t_get_ddir(struct blk_io_trace *t) |
353 | { | |
354 | if (t->action & BLK_TC_ACT(BLK_TC_READ)) | |
355 | return DDIR_READ; | |
356 | else if (t->action & BLK_TC_ACT(BLK_TC_WRITE)) | |
357 | return DDIR_WRITE; | |
358 | else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD)) | |
359 | return DDIR_TRIM; | |
360 | ||
361 | return DDIR_INVAL; | |
362 | } | |
363 | ||
364 | static void depth_inc(struct blk_io_trace *t, int *depth) | |
365 | { | |
366 | enum fio_ddir ddir; | |
367 | ||
368 | ddir = t_get_ddir(t); | |
369 | if (ddir != DDIR_INVAL) | |
370 | depth[ddir]++; | |
371 | } | |
372 | ||
373 | static void depth_dec(struct blk_io_trace *t, int *depth) | |
374 | { | |
375 | enum fio_ddir ddir; | |
376 | ||
377 | ddir = t_get_ddir(t); | |
378 | if (ddir != DDIR_INVAL) | |
379 | depth[ddir]--; | |
380 | } | |
381 | ||
382 | static void depth_end(struct blk_io_trace *t, int *this_depth, int *depth) | |
383 | { | |
384 | enum fio_ddir ddir = DDIR_INVAL; | |
385 | ||
386 | ddir = t_get_ddir(t); | |
387 | if (ddir != DDIR_INVAL) { | |
388 | depth[ddir] = max(depth[ddir], this_depth[ddir]); | |
389 | this_depth[ddir] = 0; | |
390 | } | |
391 | } | |
392 | ||
8c1fdf04 JA |
393 | /* |
394 | * Load a blktrace file by reading all the blk_io_trace entries, and storing | |
395 | * them as io_pieces like the fio text version would do. | |
396 | */ | |
b153f94a | 397 | bool load_blktrace(struct thread_data *td, const char *filename, int need_swap) |
fb7b71a3 JA |
398 | { |
399 | struct blk_io_trace t; | |
811f5421 JA |
400 | unsigned long ios[DDIR_RWDIR_SYNC_CNT] = { }; |
401 | unsigned int rw_bs[DDIR_RWDIR_CNT] = { }; | |
402 | unsigned long skipped_writes; | |
5ab088aa LS |
403 | FILE *f; |
404 | int i, old_state, max_depth; | |
405 | struct fio_file *fiof; | |
811f5421 JA |
406 | int this_depth[DDIR_RWDIR_CNT] = { }; |
407 | int depth[DDIR_RWDIR_CNT] = { }; | |
fb7b71a3 | 408 | |
5ab088aa LS |
409 | f = fopen(filename, "rb"); |
410 | if (!f) { | |
fb7b71a3 | 411 | td_verror(td, errno, "open blktrace file"); |
b153f94a | 412 | return false; |
fb7b71a3 JA |
413 | } |
414 | ||
8edd973d | 415 | old_state = td_bump_runstate(td, TD_SETTING_UP); |
5903e7b7 | 416 | |
6df8adaa | 417 | td->o.size = 0; |
4241ea8f | 418 | skipped_writes = 0; |
fb7b71a3 | 419 | do { |
5ab088aa | 420 | int ret = fread(&t, 1, sizeof(t), f); |
fb7b71a3 | 421 | |
5ab088aa LS |
422 | if (ferror(f)) { |
423 | td_verror(td, errno, "read blktrace file"); | |
8c1fdf04 | 424 | goto err; |
5ab088aa | 425 | } else if (feof(f)) { |
e2887563 | 426 | break; |
5ab088aa LS |
427 | } else if (ret < (int) sizeof(t)) { |
428 | log_err("fio: iolog short read\n"); | |
fb7b71a3 | 429 | break; |
fb7b71a3 JA |
430 | } |
431 | ||
d95b34a6 JA |
432 | if (need_swap) |
433 | byteswap_trace(&t); | |
434 | ||
fb7b71a3 | 435 | if ((t.magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) { |
5ec10eaa JA |
436 | log_err("fio: bad magic in blktrace data: %x\n", |
437 | t.magic); | |
8c1fdf04 | 438 | goto err; |
fb7b71a3 JA |
439 | } |
440 | if ((t.magic & 0xff) != BLK_IO_TRACE_VERSION) { | |
5ec10eaa JA |
441 | log_err("fio: bad blktrace version %d\n", |
442 | t.magic & 0xff); | |
8c1fdf04 | 443 | goto err; |
fb7b71a3 | 444 | } |
5ab088aa | 445 | ret = discard_pdu(f, &t); |
f12b323f | 446 | if (ret < 0) { |
874a61d0 | 447 | td_verror(td, -ret, "blktrace lseek"); |
8c1fdf04 | 448 | goto err; |
fb7b71a3 | 449 | } |
691c8fb0 | 450 | if ((t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) == 0) { |
eb5fdcf1 | 451 | if ((t.action & 0xffff) == __BLK_TA_QUEUE) |
a6eaf6c9 JA |
452 | depth_inc(&t, this_depth); |
453 | else if (((t.action & 0xffff) == __BLK_TA_BACKMERGE) || | |
454 | ((t.action & 0xffff) == __BLK_TA_FRONTMERGE)) | |
455 | depth_dec(&t, this_depth); | |
456 | else if ((t.action & 0xffff) == __BLK_TA_COMPLETE) | |
457 | depth_end(&t, this_depth, depth); | |
691c8fb0 | 458 | |
24653680 | 459 | if (t_is_write(&t) && read_only) { |
691c8fb0 | 460 | skipped_writes++; |
24653680 | 461 | continue; |
64bbb865 | 462 | } |
a6edd638 | 463 | } |
24653680 JA |
464 | |
465 | handle_trace(td, &t, ios, rw_bs); | |
fb7b71a3 JA |
466 | } while (1); |
467 | ||
5ab088aa LS |
468 | for_each_file(td, fiof, i) |
469 | trace_add_open_close_event(td, fiof->fileno, FIO_LOG_CLOSE_FILE); | |
89ac1d48 | 470 | |
5ab088aa | 471 | fclose(f); |
8c1fdf04 | 472 | |
8edd973d | 473 | td_restore_runstate(td, old_state); |
5903e7b7 | 474 | |
f01b34ae JA |
475 | if (!td->files_index) { |
476 | log_err("fio: did not find replay device(s)\n"); | |
b153f94a | 477 | return false; |
f01b34ae JA |
478 | } |
479 | ||
eb5fdcf1 JA |
480 | /* |
481 | * For stacked devices, we don't always get a COMPLETE event so | |
482 | * the depth grows to insane values. Limit it to something sane(r). | |
483 | */ | |
a6eaf6c9 JA |
484 | max_depth = 0; |
485 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { | |
486 | if (depth[i] > 1024) | |
487 | depth[i] = 1024; | |
488 | else if (!depth[i] && ios[i]) | |
489 | depth[i] = 1; | |
490 | max_depth = max(depth[i], max_depth); | |
491 | } | |
eb5fdcf1 | 492 | |
4241ea8f | 493 | if (skipped_writes) |
5ec10eaa JA |
494 | log_err("fio: %s skips replay of %lu writes due to read-only\n", |
495 | td->o.name, skipped_writes); | |
4241ea8f | 496 | |
811f5421 JA |
497 | if (!ios[DDIR_READ] && !ios[DDIR_WRITE] && !ios[DDIR_TRIM] && |
498 | !ios[DDIR_SYNC]) { | |
8c1fdf04 | 499 | log_err("fio: found no ios in blktrace data\n"); |
b153f94a | 500 | return false; |
252928cb | 501 | } |
502 | ||
503 | td->o.td_ddir = 0; | |
504 | if (ios[DDIR_READ]) { | |
505 | td->o.td_ddir |= TD_DDIR_READ; | |
d84f8d49 | 506 | td->o.max_bs[DDIR_READ] = rw_bs[DDIR_READ]; |
252928cb | 507 | } |
508 | if (ios[DDIR_WRITE]) { | |
509 | td->o.td_ddir |= TD_DDIR_WRITE; | |
d84f8d49 | 510 | td->o.max_bs[DDIR_WRITE] = rw_bs[DDIR_WRITE]; |
252928cb | 511 | } |
512 | if (ios[DDIR_TRIM]) { | |
513 | td->o.td_ddir |= TD_DDIR_TRIM; | |
24653680 | 514 | td->o.max_bs[DDIR_TRIM] = rw_bs[DDIR_TRIM]; |
d84f8d49 | 515 | } |
8c1fdf04 JA |
516 | |
517 | /* | |
518 | * We need to do direct/raw ios to the device, to avoid getting | |
76a00ec6 JA |
519 | * read-ahead in our way. But only do so if the minimum block size |
520 | * is a multiple of 4k, otherwise we don't know if it's safe to do so. | |
8c1fdf04 | 521 | */ |
76a00ec6 | 522 | if (!fio_option_is_set(&td->o, odirect) && !(td_min_bs(td) & 4095)) |
a6eaf6c9 | 523 | td->o.odirect = 1; |
8c1fdf04 | 524 | |
eb5fdcf1 | 525 | /* |
8a16f59b | 526 | * If depth wasn't manually set, use probed depth |
eb5fdcf1 | 527 | */ |
8a16f59b | 528 | if (!fio_option_is_set(&td->o, iodepth)) |
a6eaf6c9 | 529 | td->o.iodepth = td->o.iodepth_low = max_depth; |
eb5fdcf1 | 530 | |
b153f94a | 531 | return true; |
8c1fdf04 | 532 | err: |
5ab088aa | 533 | fclose(f); |
b153f94a | 534 | return false; |
fb7b71a3 | 535 | } |
b9921d1a | 536 | |
87a48ada DZ |
537 | static int init_merge_param_list(fio_fp64_t *vals, struct blktrace_cursor *bcs, |
538 | int nr_logs, int def, size_t off) | |
539 | { | |
540 | int i = 0, len = 0; | |
541 | ||
542 | while (len < FIO_IO_U_LIST_MAX_LEN && vals[len].u.f != 0.0) | |
543 | len++; | |
544 | ||
545 | if (len && len != nr_logs) | |
546 | return len; | |
547 | ||
548 | for (i = 0; i < nr_logs; i++) { | |
549 | int *val = (int *)((char *)&bcs[i] + off); | |
550 | *val = def; | |
551 | if (len) | |
552 | *val = (int)vals[i].u.f; | |
553 | } | |
554 | ||
555 | return 0; | |
556 | ||
557 | } | |
558 | ||
b9921d1a DZ |
559 | static int find_earliest_io(struct blktrace_cursor *bcs, int nr_logs) |
560 | { | |
561 | __u64 time = ~(__u64)0; | |
562 | int idx = 0, i; | |
563 | ||
564 | for (i = 0; i < nr_logs; i++) { | |
565 | if (bcs[i].t.time < time) { | |
566 | time = bcs[i].t.time; | |
567 | idx = i; | |
568 | } | |
569 | } | |
570 | ||
571 | return idx; | |
572 | } | |
573 | ||
574 | static void merge_finish_file(struct blktrace_cursor *bcs, int i, int *nr_logs) | |
575 | { | |
55bfd8c8 DZ |
576 | bcs[i].iter++; |
577 | if (bcs[i].iter < bcs[i].nr_iter) { | |
5ab088aa | 578 | fseek(bcs[i].f, 0, SEEK_SET); |
55bfd8c8 DZ |
579 | return; |
580 | } | |
581 | ||
b9921d1a DZ |
582 | *nr_logs -= 1; |
583 | ||
584 | /* close file */ | |
5ab088aa | 585 | fclose(bcs[i].f); |
b9921d1a DZ |
586 | |
587 | /* keep active files contiguous */ | |
588 | memmove(&bcs[i], &bcs[*nr_logs], sizeof(bcs[i])); | |
589 | } | |
590 | ||
591 | static int read_trace(struct thread_data *td, struct blktrace_cursor *bc) | |
592 | { | |
593 | int ret = 0; | |
594 | struct blk_io_trace *t = &bc->t; | |
595 | ||
596 | read_skip: | |
597 | /* read an io trace */ | |
5ab088aa LS |
598 | ret = fread(&t, 1, sizeof(t), bc->f); |
599 | if (ferror(bc->f)) { | |
600 | td_verror(td, errno, "read blktrace file"); | |
55bfd8c8 | 601 | return ret; |
5ab088aa | 602 | } else if (feof(bc->f)) { |
55bfd8c8 DZ |
603 | if (!bc->length) |
604 | bc->length = bc->t.time; | |
b9921d1a DZ |
605 | return ret; |
606 | } else if (ret < (int) sizeof(*t)) { | |
5ab088aa | 607 | log_err("fio: iolog short read\n"); |
b9921d1a DZ |
608 | return -1; |
609 | } | |
610 | ||
611 | if (bc->swap) | |
612 | byteswap_trace(t); | |
613 | ||
614 | /* skip over actions that fio does not care about */ | |
615 | if ((t->action & 0xffff) != __BLK_TA_QUEUE || | |
616 | t_get_ddir(t) == DDIR_INVAL) { | |
5ab088aa | 617 | ret = discard_pdu(bc->f, t); |
b9921d1a | 618 | if (ret < 0) { |
874a61d0 | 619 | td_verror(td, -ret, "blktrace lseek"); |
b9921d1a | 620 | return ret; |
b9921d1a DZ |
621 | } |
622 | goto read_skip; | |
623 | } | |
624 | ||
55bfd8c8 | 625 | t->time = (t->time + bc->iter * bc->length) * bc->scalar / 100; |
87a48ada | 626 | |
b9921d1a DZ |
627 | return ret; |
628 | } | |
629 | ||
630 | static int write_trace(FILE *fp, struct blk_io_trace *t) | |
631 | { | |
632 | /* pdu is not used so just write out only the io trace */ | |
633 | t->pdu_len = 0; | |
634 | return fwrite((void *)t, sizeof(*t), 1, fp); | |
635 | } | |
636 | ||
637 | int merge_blktrace_iologs(struct thread_data *td) | |
638 | { | |
639 | int nr_logs = get_max_str_idx(td->o.read_iolog_file); | |
640 | struct blktrace_cursor *bcs = malloc(sizeof(struct blktrace_cursor) * | |
641 | nr_logs); | |
642 | struct blktrace_cursor *bc; | |
643 | FILE *merge_fp; | |
644 | char *str, *ptr, *name, *merge_buf; | |
645 | int i, ret; | |
646 | ||
87a48ada DZ |
647 | ret = init_merge_param_list(td->o.merge_blktrace_scalars, bcs, nr_logs, |
648 | 100, offsetof(struct blktrace_cursor, | |
649 | scalar)); | |
650 | if (ret) { | |
651 | log_err("fio: merge_blktrace_scalars(%d) != nr_logs(%d)\n", | |
652 | ret, nr_logs); | |
653 | goto err_param; | |
654 | } | |
655 | ||
55bfd8c8 DZ |
656 | ret = init_merge_param_list(td->o.merge_blktrace_iters, bcs, nr_logs, |
657 | 1, offsetof(struct blktrace_cursor, | |
658 | nr_iter)); | |
659 | if (ret) { | |
660 | log_err("fio: merge_blktrace_iters(%d) != nr_logs(%d)\n", | |
661 | ret, nr_logs); | |
662 | goto err_param; | |
663 | } | |
664 | ||
b9921d1a DZ |
665 | /* setup output file */ |
666 | merge_fp = fopen(td->o.merge_blktrace_file, "w"); | |
667 | merge_buf = malloc(128 * 1024); | |
c81ab051 BVA |
668 | if (!merge_buf) |
669 | goto err_out_file; | |
b9921d1a DZ |
670 | ret = setvbuf(merge_fp, merge_buf, _IOFBF, 128 * 1024); |
671 | if (ret) | |
c81ab051 | 672 | goto err_merge_buf; |
b9921d1a DZ |
673 | |
674 | /* setup input files */ | |
675 | str = ptr = strdup(td->o.read_iolog_file); | |
676 | nr_logs = 0; | |
677 | for (i = 0; (name = get_next_str(&ptr)) != NULL; i++) { | |
5ab088aa LS |
678 | bcs[i].f = fopen(name, "rb"); |
679 | if (!bcs[i].f) { | |
b9921d1a | 680 | log_err("fio: could not open file: %s\n", name); |
5ab088aa | 681 | ret = -errno; |
2ba46d1b | 682 | free(str); |
b9921d1a DZ |
683 | goto err_file; |
684 | } | |
b9921d1a DZ |
685 | nr_logs++; |
686 | ||
687 | if (!is_blktrace(name, &bcs[i].swap)) { | |
688 | log_err("fio: file is not a blktrace: %s\n", name); | |
2ba46d1b | 689 | free(str); |
b9921d1a DZ |
690 | goto err_file; |
691 | } | |
692 | ||
693 | ret = read_trace(td, &bcs[i]); | |
694 | if (ret < 0) { | |
2ba46d1b | 695 | free(str); |
b9921d1a DZ |
696 | goto err_file; |
697 | } else if (!ret) { | |
698 | merge_finish_file(bcs, i, &nr_logs); | |
699 | i--; | |
700 | } | |
701 | } | |
702 | free(str); | |
703 | ||
704 | /* merge files */ | |
705 | while (nr_logs) { | |
706 | i = find_earliest_io(bcs, nr_logs); | |
707 | bc = &bcs[i]; | |
708 | /* skip over the pdu */ | |
5ab088aa | 709 | ret = discard_pdu(bc->f, &bc->t); |
b9921d1a | 710 | if (ret < 0) { |
874a61d0 | 711 | td_verror(td, -ret, "blktrace lseek"); |
b9921d1a | 712 | goto err_file; |
b9921d1a DZ |
713 | } |
714 | ||
715 | ret = write_trace(merge_fp, &bc->t); | |
716 | ret = read_trace(td, bc); | |
717 | if (ret < 0) | |
718 | goto err_file; | |
719 | else if (!ret) | |
720 | merge_finish_file(bcs, i, &nr_logs); | |
721 | } | |
722 | ||
723 | /* set iolog file to read from the newly merged file */ | |
724 | td->o.read_iolog_file = td->o.merge_blktrace_file; | |
725 | ret = 0; | |
726 | ||
727 | err_file: | |
728 | /* cleanup */ | |
729 | for (i = 0; i < nr_logs; i++) { | |
5ab088aa | 730 | fclose(bcs[i].f); |
b9921d1a | 731 | } |
c81ab051 BVA |
732 | err_merge_buf: |
733 | free(merge_buf); | |
b9921d1a DZ |
734 | err_out_file: |
735 | fflush(merge_fp); | |
736 | fclose(merge_fp); | |
87a48ada | 737 | err_param: |
b9921d1a DZ |
738 | free(bcs); |
739 | ||
740 | return ret; | |
741 | } |