Commit | Line | Data |
---|---|---|
fb7b71a3 JA |
1 | /* |
2 | * blktrace support code for fio | |
3 | */ | |
4 | #include <stdio.h> | |
5 | #include <stdlib.h> | |
26e616d0 | 6 | #include <sys/ioctl.h> |
87a48ada | 7 | #include <unistd.h> |
26e616d0 | 8 | #include <linux/fs.h> |
8c1fdf04 | 9 | |
01743ee1 | 10 | #include "flist.h" |
fb7b71a3 | 11 | #include "fio.h" |
a3e59412 | 12 | #include "blktrace.h" |
fb7b71a3 | 13 | #include "blktrace_api.h" |
984f30c9 | 14 | #include "oslib/linux-dev-lookup.h" |
fb7b71a3 | 15 | |
2da7df1d | 16 | #define TRACE_FIFO_SIZE 8192 |
e2887563 JA |
17 | |
18 | /* | |
19 | * fifo refill frontend, to avoid reading data in trace sized bites | |
20 | */ | |
21 | static int refill_fifo(struct thread_data *td, struct fifo *fifo, int fd) | |
22 | { | |
23 | char buf[TRACE_FIFO_SIZE]; | |
f12b323f | 24 | unsigned int total; |
e2887563 JA |
25 | int ret; |
26 | ||
f12b323f JA |
27 | total = sizeof(buf); |
28 | if (total > fifo_room(fifo)) | |
29 | total = fifo_room(fifo); | |
e2887563 | 30 | |
f12b323f JA |
31 | ret = read(fd, buf, total); |
32 | if (ret < 0) { | |
33 | td_verror(td, errno, "read blktrace file"); | |
34 | return -1; | |
e2887563 JA |
35 | } |
36 | ||
f12b323f JA |
37 | if (ret > 0) |
38 | ret = fifo_put(fifo, buf, ret); | |
39 | ||
bd6f78b2 | 40 | dprint(FD_BLKTRACE, "refill: filled %d bytes\n", ret); |
f12b323f | 41 | return ret; |
e2887563 JA |
42 | } |
43 | ||
44 | /* | |
45 | * Retrieve 'len' bytes from the fifo, refilling if necessary. | |
46 | */ | |
47 | static int trace_fifo_get(struct thread_data *td, struct fifo *fifo, int fd, | |
48 | void *buf, unsigned int len) | |
49 | { | |
f12b323f JA |
50 | if (fifo_len(fifo) < len) { |
51 | int ret = refill_fifo(td, fifo, fd); | |
e2887563 | 52 | |
f12b323f JA |
53 | if (ret < 0) |
54 | return ret; | |
55 | } | |
e2887563 JA |
56 | |
57 | return fifo_get(fifo, buf, len); | |
58 | } | |
59 | ||
8c1fdf04 JA |
60 | /* |
61 | * Just discard the pdu by seeking past it. | |
62 | */ | |
f12b323f JA |
63 | static int discard_pdu(struct thread_data *td, struct fifo *fifo, int fd, |
64 | struct blk_io_trace *t) | |
fb7b71a3 JA |
65 | { |
66 | if (t->pdu_len == 0) | |
67 | return 0; | |
68 | ||
bd6f78b2 | 69 | dprint(FD_BLKTRACE, "discard pdu len %u\n", t->pdu_len); |
f12b323f | 70 | return trace_fifo_get(td, fifo, fd, NULL, t->pdu_len); |
fb7b71a3 JA |
71 | } |
72 | ||
8c1fdf04 JA |
73 | /* |
74 | * Check if this is a blktrace binary data file. We read a single trace | |
75 | * into memory and check for the magic signature. | |
76 | */ | |
b153f94a | 77 | bool is_blktrace(const char *filename, int *need_swap) |
fb7b71a3 JA |
78 | { |
79 | struct blk_io_trace t; | |
80 | int fd, ret; | |
81 | ||
82 | fd = open(filename, O_RDONLY); | |
4dced407 | 83 | if (fd < 0) |
b153f94a | 84 | return false; |
fb7b71a3 JA |
85 | |
86 | ret = read(fd, &t, sizeof(t)); | |
87 | close(fd); | |
88 | ||
89 | if (ret < 0) { | |
90 | perror("read blktrace"); | |
b153f94a | 91 | return false; |
fb7b71a3 JA |
92 | } else if (ret != sizeof(t)) { |
93 | log_err("fio: short read on blktrace file\n"); | |
b153f94a | 94 | return false; |
fb7b71a3 JA |
95 | } |
96 | ||
d95b34a6 JA |
97 | if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { |
98 | *need_swap = 0; | |
b153f94a | 99 | return true; |
d95b34a6 JA |
100 | } |
101 | ||
102 | /* | |
103 | * Maybe it needs to be endian swapped... | |
104 | */ | |
105 | t.magic = fio_swap32(t.magic); | |
106 | if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { | |
107 | *need_swap = 1; | |
b153f94a | 108 | return true; |
d95b34a6 | 109 | } |
fb7b71a3 | 110 | |
b153f94a | 111 | return false; |
fb7b71a3 JA |
112 | } |
113 | ||
c69aa91f JA |
114 | #define FMINORBITS 20 |
115 | #define FMINORMASK ((1U << FMINORBITS) - 1) | |
116 | #define FMAJOR(dev) ((unsigned int) ((dev) >> FMINORBITS)) | |
117 | #define FMINOR(dev) ((unsigned int) ((dev) & FMINORMASK)) | |
eeb9c2aa | 118 | |
89ac1d48 | 119 | static void trace_add_open_close_event(struct thread_data *td, int fileno, enum file_log_act action) |
691c8fb0 JA |
120 | { |
121 | struct io_piece *ipo; | |
122 | ||
123 | ipo = calloc(1, sizeof(*ipo)); | |
0d29de83 | 124 | init_ipo(ipo); |
691c8fb0 JA |
125 | |
126 | ipo->ddir = DDIR_INVAL; | |
127 | ipo->fileno = fileno; | |
89ac1d48 | 128 | ipo->file_action = action; |
01743ee1 | 129 | flist_add_tail(&ipo->list, &td->io_log_list); |
691c8fb0 JA |
130 | } |
131 | ||
26e616d0 | 132 | static int get_dev_blocksize(const char *dev, unsigned int *bs) |
5e6c2067 | 133 | { |
26e616d0 JA |
134 | int fd; |
135 | ||
136 | fd = open(dev, O_RDONLY); | |
137 | if (fd < 0) | |
138 | return 1; | |
139 | ||
140 | if (ioctl(fd, BLKSSZGET, bs) < 0) { | |
141 | close(fd); | |
142 | return 1; | |
143 | } | |
144 | ||
145 | close(fd); | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static int trace_add_file(struct thread_data *td, __u32 device, | |
150 | unsigned int *bs) | |
151 | { | |
152 | static unsigned int last_maj, last_min, last_fileno, last_bs; | |
c69aa91f JA |
153 | unsigned int maj = FMAJOR(device); |
154 | unsigned int min = FMINOR(device); | |
5e6c2067 | 155 | struct fio_file *f; |
5e6c2067 | 156 | unsigned int i; |
26e616d0 | 157 | char dev[256]; |
5e6c2067 | 158 | |
26e616d0 JA |
159 | if (last_maj == maj && last_min == min) { |
160 | *bs = last_bs; | |
89ac1d48 | 161 | return last_fileno; |
26e616d0 | 162 | } |
5e6c2067 JA |
163 | |
164 | last_maj = maj; | |
165 | last_min = min; | |
166 | ||
167 | /* | |
168 | * check for this file in our list | |
169 | */ | |
26e616d0 | 170 | for_each_file(td, f, i) { |
89ac1d48 SL |
171 | if (f->major == maj && f->minor == min) { |
172 | last_fileno = f->fileno; | |
26e616d0 JA |
173 | last_bs = f->bs; |
174 | goto out; | |
89ac1d48 | 175 | } |
26e616d0 | 176 | } |
5e6c2067 JA |
177 | |
178 | strcpy(dev, "/dev"); | |
40bafa33 | 179 | if (blktrace_lookup_device(td->o.replay_redirect, dev, maj, min)) { |
26e616d0 | 180 | unsigned int this_bs; |
691c8fb0 JA |
181 | int fileno; |
182 | ||
40bafa33 JA |
183 | if (td->o.replay_redirect) |
184 | dprint(FD_BLKTRACE, "device lookup: %d/%d\n overridden" | |
185 | " with: %s\n", maj, min, | |
186 | td->o.replay_redirect); | |
187 | else | |
188 | dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj, min); | |
189 | ||
bd6f78b2 | 190 | dprint(FD_BLKTRACE, "add devices %s\n", dev); |
49ffb4a2 | 191 | fileno = add_file_exclusive(td, dev); |
26e616d0 JA |
192 | |
193 | if (get_dev_blocksize(dev, &this_bs)) | |
194 | this_bs = 512; | |
195 | ||
b53f2c54 | 196 | td->o.open_files++; |
5903e7b7 JA |
197 | td->files[fileno]->major = maj; |
198 | td->files[fileno]->minor = min; | |
26e616d0 | 199 | td->files[fileno]->bs = this_bs; |
89ac1d48 | 200 | trace_add_open_close_event(td, fileno, FIO_LOG_OPEN_FILE); |
26e616d0 | 201 | |
89ac1d48 | 202 | last_fileno = fileno; |
26e616d0 | 203 | last_bs = this_bs; |
bd6f78b2 | 204 | } |
f01b34ae | 205 | |
26e616d0 JA |
206 | out: |
207 | *bs = last_bs; | |
89ac1d48 | 208 | return last_fileno; |
5e6c2067 JA |
209 | } |
210 | ||
0c63576e JA |
211 | static void t_bytes_align(struct thread_options *o, struct blk_io_trace *t) |
212 | { | |
213 | if (!o->replay_align) | |
214 | return; | |
215 | ||
216 | t->bytes = (t->bytes + o->replay_align - 1) & ~(o->replay_align - 1); | |
217 | } | |
218 | ||
8c1fdf04 JA |
219 | /* |
220 | * Store blk_io_trace data in an ipo for later retrieval. | |
221 | */ | |
fdefd987 | 222 | static void store_ipo(struct thread_data *td, unsigned long long offset, |
89ac1d48 | 223 | unsigned int bytes, int rw, unsigned long long ttime, |
26e616d0 | 224 | int fileno, unsigned int bs) |
fdefd987 | 225 | { |
8812d7f2 | 226 | struct io_piece *ipo; |
fdefd987 | 227 | |
8812d7f2 | 228 | ipo = calloc(1, sizeof(*ipo)); |
0d29de83 JA |
229 | init_ipo(ipo); |
230 | ||
26e616d0 | 231 | ipo->offset = offset * bs; |
0c63576e JA |
232 | if (td->o.replay_scale) |
233 | ipo->offset = ipo->offset / td->o.replay_scale; | |
a79f17bf | 234 | ipo_bytes_align(td->o.replay_align, ipo); |
fdefd987 | 235 | ipo->len = bytes; |
8c1fdf04 | 236 | ipo->delay = ttime / 1000; |
fdefd987 JA |
237 | if (rw) |
238 | ipo->ddir = DDIR_WRITE; | |
239 | else | |
240 | ipo->ddir = DDIR_READ; | |
89ac1d48 | 241 | ipo->fileno = fileno; |
fdefd987 | 242 | |
bd6f78b2 JA |
243 | dprint(FD_BLKTRACE, "store ddir=%d, off=%llu, len=%lu, delay=%lu\n", |
244 | ipo->ddir, ipo->offset, | |
245 | ipo->len, ipo->delay); | |
691c8fb0 | 246 | queue_io_piece(td, ipo); |
fdefd987 JA |
247 | } |
248 | ||
0b9d69ec | 249 | static void handle_trace_notify(struct blk_io_trace *t) |
cd991b9e | 250 | { |
691c8fb0 JA |
251 | switch (t->action) { |
252 | case BLK_TN_PROCESS: | |
24653680 | 253 | dprint(FD_BLKTRACE, "got process notify: %x, %d\n", |
d95b34a6 | 254 | t->action, t->pid); |
691c8fb0 JA |
255 | break; |
256 | case BLK_TN_TIMESTAMP: | |
24653680 | 257 | dprint(FD_BLKTRACE, "got timestamp notify: %x, %d\n", |
d95b34a6 | 258 | t->action, t->pid); |
691c8fb0 | 259 | break; |
ff58fced JA |
260 | case BLK_TN_MESSAGE: |
261 | break; | |
691c8fb0 JA |
262 | default: |
263 | dprint(FD_BLKTRACE, "unknown trace act %x\n", t->action); | |
264 | break; | |
265 | } | |
266 | } | |
5b3023b8 | 267 | |
24653680 JA |
268 | static void handle_trace_discard(struct thread_data *td, |
269 | struct blk_io_trace *t, | |
270 | unsigned long long ttime, | |
26e616d0 | 271 | unsigned long *ios, unsigned int *rw_bs) |
ff58fced | 272 | { |
8812d7f2 | 273 | struct io_piece *ipo; |
26e616d0 | 274 | unsigned int bs; |
89ac1d48 | 275 | int fileno; |
ff58fced | 276 | |
d7235efb JA |
277 | if (td->o.replay_skip & (1u << DDIR_TRIM)) |
278 | return; | |
279 | ||
8812d7f2 | 280 | ipo = calloc(1, sizeof(*ipo)); |
0d29de83 | 281 | init_ipo(ipo); |
26e616d0 | 282 | fileno = trace_add_file(td, t->device, &bs); |
ff58fced | 283 | |
24653680 | 284 | ios[DDIR_TRIM]++; |
26e616d0 JA |
285 | if (t->bytes > rw_bs[DDIR_TRIM]) |
286 | rw_bs[DDIR_TRIM] = t->bytes; | |
24653680 | 287 | |
ff58fced JA |
288 | td->o.size += t->bytes; |
289 | ||
ff58fced JA |
290 | INIT_FLIST_HEAD(&ipo->list); |
291 | ||
26e616d0 | 292 | ipo->offset = t->sector * bs; |
0c63576e JA |
293 | if (td->o.replay_scale) |
294 | ipo->offset = ipo->offset / td->o.replay_scale; | |
a79f17bf | 295 | ipo_bytes_align(td->o.replay_align, ipo); |
ff58fced JA |
296 | ipo->len = t->bytes; |
297 | ipo->delay = ttime / 1000; | |
298 | ipo->ddir = DDIR_TRIM; | |
89ac1d48 | 299 | ipo->fileno = fileno; |
ff58fced JA |
300 | |
301 | dprint(FD_BLKTRACE, "store discard, off=%llu, len=%lu, delay=%lu\n", | |
302 | ipo->offset, ipo->len, | |
303 | ipo->delay); | |
304 | queue_io_piece(td, ipo); | |
305 | } | |
306 | ||
19a8064e JA |
307 | static void dump_trace(struct blk_io_trace *t) |
308 | { | |
309 | log_err("blktrace: ignoring zero byte trace: action=%x\n", t->action); | |
310 | } | |
311 | ||
691c8fb0 JA |
312 | static void handle_trace_fs(struct thread_data *td, struct blk_io_trace *t, |
313 | unsigned long long ttime, unsigned long *ios, | |
26e616d0 | 314 | unsigned int *rw_bs) |
691c8fb0 | 315 | { |
26e616d0 | 316 | unsigned int bs; |
691c8fb0 | 317 | int rw; |
89ac1d48 | 318 | int fileno; |
5b3023b8 | 319 | |
26e616d0 | 320 | fileno = trace_add_file(td, t->device, &bs); |
5b3023b8 JA |
321 | |
322 | rw = (t->action & BLK_TC_ACT(BLK_TC_WRITE)) != 0; | |
323 | ||
d7235efb JA |
324 | if (rw) { |
325 | if (td->o.replay_skip & (1u << DDIR_WRITE)) | |
326 | return; | |
327 | } else { | |
328 | if (td->o.replay_skip & (1u << DDIR_READ)) | |
329 | return; | |
330 | } | |
331 | ||
19a8064e JA |
332 | if (!t->bytes) { |
333 | if (!fio_did_warn(FIO_WARN_BTRACE_ZERO)) | |
334 | dump_trace(t); | |
335 | return; | |
336 | } | |
c1f22c21 JA |
337 | |
338 | if (t->bytes > rw_bs[rw]) | |
26e616d0 | 339 | rw_bs[rw] = t->bytes; |
5b3023b8 JA |
340 | |
341 | ios[rw]++; | |
342 | td->o.size += t->bytes; | |
26e616d0 | 343 | store_ipo(td, t->sector, t->bytes, rw, ttime, fileno, bs); |
cd991b9e JA |
344 | } |
345 | ||
65c42cc8 | 346 | static void handle_trace_flush(struct thread_data *td, struct blk_io_trace *t, |
811f5421 | 347 | unsigned long long ttime, unsigned long *ios) |
65c42cc8 JA |
348 | { |
349 | struct io_piece *ipo; | |
350 | unsigned int bs; | |
351 | int fileno; | |
352 | ||
d7235efb JA |
353 | if (td->o.replay_skip & (1u << DDIR_SYNC)) |
354 | return; | |
355 | ||
65c42cc8 JA |
356 | ipo = calloc(1, sizeof(*ipo)); |
357 | init_ipo(ipo); | |
358 | fileno = trace_add_file(td, t->device, &bs); | |
359 | ||
360 | ipo->delay = ttime / 1000; | |
361 | ipo->ddir = DDIR_SYNC; | |
362 | ipo->fileno = fileno; | |
363 | ||
811f5421 | 364 | ios[DDIR_SYNC]++; |
65c42cc8 JA |
365 | dprint(FD_BLKTRACE, "store flush delay=%lu\n", ipo->delay); |
366 | queue_io_piece(td, ipo); | |
367 | } | |
368 | ||
691c8fb0 JA |
369 | /* |
370 | * We only care for queue traces, most of the others are side effects | |
371 | * due to internal workings of the block layer. | |
372 | */ | |
373 | static void handle_trace(struct thread_data *td, struct blk_io_trace *t, | |
24653680 | 374 | unsigned long *ios, unsigned int *bs) |
691c8fb0 | 375 | { |
24653680 | 376 | static unsigned long long last_ttime; |
0c63576e | 377 | unsigned long long delay = 0; |
24653680 | 378 | |
691c8fb0 JA |
379 | if ((t->action & 0xffff) != __BLK_TA_QUEUE) |
380 | return; | |
24653680 JA |
381 | |
382 | if (!(t->action & BLK_TC_ACT(BLK_TC_NOTIFY))) { | |
6dd7fa77 | 383 | if (!last_ttime || td->o.no_stall) |
24653680 | 384 | delay = 0; |
6dd7fa77 | 385 | else if (td->o.replay_time_scale == 100) |
24653680 | 386 | delay = t->time - last_ttime; |
6dd7fa77 JA |
387 | else { |
388 | double tmp = t->time - last_ttime; | |
389 | double scale; | |
390 | ||
391 | scale = (double) 100.0 / (double) td->o.replay_time_scale; | |
392 | tmp *= scale; | |
393 | delay = tmp; | |
24653680 | 394 | } |
6dd7fa77 | 395 | last_ttime = t->time; |
24653680 | 396 | } |
691c8fb0 | 397 | |
0c63576e JA |
398 | t_bytes_align(&td->o, t); |
399 | ||
691c8fb0 | 400 | if (t->action & BLK_TC_ACT(BLK_TC_NOTIFY)) |
aec2de20 | 401 | handle_trace_notify(t); |
ff58fced | 402 | else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD)) |
24653680 | 403 | handle_trace_discard(td, t, delay, ios, bs); |
65c42cc8 | 404 | else if (t->action & BLK_TC_ACT(BLK_TC_FLUSH)) |
811f5421 | 405 | handle_trace_flush(td, t, delay, ios); |
691c8fb0 | 406 | else |
24653680 | 407 | handle_trace_fs(td, t, delay, ios, bs); |
691c8fb0 JA |
408 | } |
409 | ||
d95b34a6 JA |
410 | static void byteswap_trace(struct blk_io_trace *t) |
411 | { | |
412 | t->magic = fio_swap32(t->magic); | |
413 | t->sequence = fio_swap32(t->sequence); | |
414 | t->time = fio_swap64(t->time); | |
415 | t->sector = fio_swap64(t->sector); | |
416 | t->bytes = fio_swap32(t->bytes); | |
417 | t->action = fio_swap32(t->action); | |
418 | t->pid = fio_swap32(t->pid); | |
419 | t->device = fio_swap32(t->device); | |
420 | t->cpu = fio_swap32(t->cpu); | |
421 | t->error = fio_swap16(t->error); | |
422 | t->pdu_len = fio_swap16(t->pdu_len); | |
423 | } | |
424 | ||
b153f94a | 425 | static bool t_is_write(struct blk_io_trace *t) |
24653680 JA |
426 | { |
427 | return (t->action & BLK_TC_ACT(BLK_TC_WRITE | BLK_TC_DISCARD)) != 0; | |
428 | } | |
429 | ||
a6eaf6c9 JA |
430 | static enum fio_ddir t_get_ddir(struct blk_io_trace *t) |
431 | { | |
432 | if (t->action & BLK_TC_ACT(BLK_TC_READ)) | |
433 | return DDIR_READ; | |
434 | else if (t->action & BLK_TC_ACT(BLK_TC_WRITE)) | |
435 | return DDIR_WRITE; | |
436 | else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD)) | |
437 | return DDIR_TRIM; | |
438 | ||
439 | return DDIR_INVAL; | |
440 | } | |
441 | ||
442 | static void depth_inc(struct blk_io_trace *t, int *depth) | |
443 | { | |
444 | enum fio_ddir ddir; | |
445 | ||
446 | ddir = t_get_ddir(t); | |
447 | if (ddir != DDIR_INVAL) | |
448 | depth[ddir]++; | |
449 | } | |
450 | ||
451 | static void depth_dec(struct blk_io_trace *t, int *depth) | |
452 | { | |
453 | enum fio_ddir ddir; | |
454 | ||
455 | ddir = t_get_ddir(t); | |
456 | if (ddir != DDIR_INVAL) | |
457 | depth[ddir]--; | |
458 | } | |
459 | ||
460 | static void depth_end(struct blk_io_trace *t, int *this_depth, int *depth) | |
461 | { | |
462 | enum fio_ddir ddir = DDIR_INVAL; | |
463 | ||
464 | ddir = t_get_ddir(t); | |
465 | if (ddir != DDIR_INVAL) { | |
466 | depth[ddir] = max(depth[ddir], this_depth[ddir]); | |
467 | this_depth[ddir] = 0; | |
468 | } | |
469 | } | |
470 | ||
8c1fdf04 JA |
471 | /* |
472 | * Load a blktrace file by reading all the blk_io_trace entries, and storing | |
473 | * them as io_pieces like the fio text version would do. | |
474 | */ | |
b153f94a | 475 | bool load_blktrace(struct thread_data *td, const char *filename, int need_swap) |
fb7b71a3 JA |
476 | { |
477 | struct blk_io_trace t; | |
811f5421 JA |
478 | unsigned long ios[DDIR_RWDIR_SYNC_CNT] = { }; |
479 | unsigned int rw_bs[DDIR_RWDIR_CNT] = { }; | |
480 | unsigned long skipped_writes; | |
e2887563 | 481 | struct fifo *fifo; |
811f5421 | 482 | int fd, i, old_state, max_depth; |
89ac1d48 | 483 | struct fio_file *f; |
811f5421 JA |
484 | int this_depth[DDIR_RWDIR_CNT] = { }; |
485 | int depth[DDIR_RWDIR_CNT] = { }; | |
fb7b71a3 JA |
486 | |
487 | fd = open(filename, O_RDONLY); | |
488 | if (fd < 0) { | |
489 | td_verror(td, errno, "open blktrace file"); | |
b153f94a | 490 | return false; |
fb7b71a3 JA |
491 | } |
492 | ||
e2887563 JA |
493 | fifo = fifo_alloc(TRACE_FIFO_SIZE); |
494 | ||
8edd973d | 495 | old_state = td_bump_runstate(td, TD_SETTING_UP); |
5903e7b7 | 496 | |
6df8adaa | 497 | td->o.size = 0; |
4241ea8f | 498 | skipped_writes = 0; |
fb7b71a3 | 499 | do { |
e2887563 | 500 | int ret = trace_fifo_get(td, fifo, fd, &t, sizeof(t)); |
fb7b71a3 | 501 | |
e2887563 | 502 | if (ret < 0) |
8c1fdf04 | 503 | goto err; |
e2887563 JA |
504 | else if (!ret) |
505 | break; | |
506 | else if (ret < (int) sizeof(t)) { | |
507 | log_err("fio: short fifo get\n"); | |
fb7b71a3 | 508 | break; |
fb7b71a3 JA |
509 | } |
510 | ||
d95b34a6 JA |
511 | if (need_swap) |
512 | byteswap_trace(&t); | |
513 | ||
fb7b71a3 | 514 | if ((t.magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) { |
5ec10eaa JA |
515 | log_err("fio: bad magic in blktrace data: %x\n", |
516 | t.magic); | |
8c1fdf04 | 517 | goto err; |
fb7b71a3 JA |
518 | } |
519 | if ((t.magic & 0xff) != BLK_IO_TRACE_VERSION) { | |
5ec10eaa JA |
520 | log_err("fio: bad blktrace version %d\n", |
521 | t.magic & 0xff); | |
8c1fdf04 | 522 | goto err; |
fb7b71a3 | 523 | } |
f12b323f JA |
524 | ret = discard_pdu(td, fifo, fd, &t); |
525 | if (ret < 0) { | |
fb7b71a3 | 526 | td_verror(td, ret, "blktrace lseek"); |
8c1fdf04 | 527 | goto err; |
f12b323f JA |
528 | } else if (t.pdu_len != ret) { |
529 | log_err("fio: discarded %d of %d\n", ret, t.pdu_len); | |
530 | goto err; | |
fb7b71a3 | 531 | } |
691c8fb0 | 532 | if ((t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) == 0) { |
eb5fdcf1 | 533 | if ((t.action & 0xffff) == __BLK_TA_QUEUE) |
a6eaf6c9 JA |
534 | depth_inc(&t, this_depth); |
535 | else if (((t.action & 0xffff) == __BLK_TA_BACKMERGE) || | |
536 | ((t.action & 0xffff) == __BLK_TA_FRONTMERGE)) | |
537 | depth_dec(&t, this_depth); | |
538 | else if ((t.action & 0xffff) == __BLK_TA_COMPLETE) | |
539 | depth_end(&t, this_depth, depth); | |
691c8fb0 | 540 | |
24653680 | 541 | if (t_is_write(&t) && read_only) { |
691c8fb0 | 542 | skipped_writes++; |
24653680 | 543 | continue; |
64bbb865 | 544 | } |
a6edd638 | 545 | } |
24653680 JA |
546 | |
547 | handle_trace(td, &t, ios, rw_bs); | |
fb7b71a3 JA |
548 | } while (1); |
549 | ||
3643a1f2 | 550 | for_each_file(td, f, i) |
89ac1d48 | 551 | trace_add_open_close_event(td, f->fileno, FIO_LOG_CLOSE_FILE); |
89ac1d48 | 552 | |
38470f85 | 553 | fifo_free(fifo); |
fb7b71a3 | 554 | close(fd); |
8c1fdf04 | 555 | |
8edd973d | 556 | td_restore_runstate(td, old_state); |
5903e7b7 | 557 | |
f01b34ae JA |
558 | if (!td->files_index) { |
559 | log_err("fio: did not find replay device(s)\n"); | |
b153f94a | 560 | return false; |
f01b34ae JA |
561 | } |
562 | ||
eb5fdcf1 JA |
563 | /* |
564 | * For stacked devices, we don't always get a COMPLETE event so | |
565 | * the depth grows to insane values. Limit it to something sane(r). | |
566 | */ | |
a6eaf6c9 JA |
567 | max_depth = 0; |
568 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { | |
569 | if (depth[i] > 1024) | |
570 | depth[i] = 1024; | |
571 | else if (!depth[i] && ios[i]) | |
572 | depth[i] = 1; | |
573 | max_depth = max(depth[i], max_depth); | |
574 | } | |
eb5fdcf1 | 575 | |
4241ea8f | 576 | if (skipped_writes) |
5ec10eaa JA |
577 | log_err("fio: %s skips replay of %lu writes due to read-only\n", |
578 | td->o.name, skipped_writes); | |
4241ea8f | 579 | |
811f5421 JA |
580 | if (!ios[DDIR_READ] && !ios[DDIR_WRITE] && !ios[DDIR_TRIM] && |
581 | !ios[DDIR_SYNC]) { | |
8c1fdf04 | 582 | log_err("fio: found no ios in blktrace data\n"); |
b153f94a | 583 | return false; |
24653680 | 584 | } else if (ios[DDIR_READ] && !ios[DDIR_WRITE]) { |
8c1fdf04 | 585 | td->o.td_ddir = TD_DDIR_READ; |
d84f8d49 JA |
586 | td->o.max_bs[DDIR_READ] = rw_bs[DDIR_READ]; |
587 | } else if (!ios[DDIR_READ] && ios[DDIR_WRITE]) { | |
8c1fdf04 | 588 | td->o.td_ddir = TD_DDIR_WRITE; |
d84f8d49 JA |
589 | td->o.max_bs[DDIR_WRITE] = rw_bs[DDIR_WRITE]; |
590 | } else { | |
8c1fdf04 | 591 | td->o.td_ddir = TD_DDIR_RW; |
d84f8d49 JA |
592 | td->o.max_bs[DDIR_READ] = rw_bs[DDIR_READ]; |
593 | td->o.max_bs[DDIR_WRITE] = rw_bs[DDIR_WRITE]; | |
24653680 | 594 | td->o.max_bs[DDIR_TRIM] = rw_bs[DDIR_TRIM]; |
d84f8d49 | 595 | } |
8c1fdf04 JA |
596 | |
597 | /* | |
598 | * We need to do direct/raw ios to the device, to avoid getting | |
76a00ec6 JA |
599 | * read-ahead in our way. But only do so if the minimum block size |
600 | * is a multiple of 4k, otherwise we don't know if it's safe to do so. | |
8c1fdf04 | 601 | */ |
76a00ec6 | 602 | if (!fio_option_is_set(&td->o, odirect) && !(td_min_bs(td) & 4095)) |
a6eaf6c9 | 603 | td->o.odirect = 1; |
8c1fdf04 | 604 | |
eb5fdcf1 | 605 | /* |
8a16f59b | 606 | * If depth wasn't manually set, use probed depth |
eb5fdcf1 | 607 | */ |
8a16f59b | 608 | if (!fio_option_is_set(&td->o, iodepth)) |
a6eaf6c9 | 609 | td->o.iodepth = td->o.iodepth_low = max_depth; |
eb5fdcf1 | 610 | |
b153f94a | 611 | return true; |
8c1fdf04 JA |
612 | err: |
613 | close(fd); | |
38470f85 | 614 | fifo_free(fifo); |
b153f94a | 615 | return false; |
fb7b71a3 | 616 | } |
b9921d1a | 617 | |
87a48ada DZ |
618 | static int init_merge_param_list(fio_fp64_t *vals, struct blktrace_cursor *bcs, |
619 | int nr_logs, int def, size_t off) | |
620 | { | |
621 | int i = 0, len = 0; | |
622 | ||
623 | while (len < FIO_IO_U_LIST_MAX_LEN && vals[len].u.f != 0.0) | |
624 | len++; | |
625 | ||
626 | if (len && len != nr_logs) | |
627 | return len; | |
628 | ||
629 | for (i = 0; i < nr_logs; i++) { | |
630 | int *val = (int *)((char *)&bcs[i] + off); | |
631 | *val = def; | |
632 | if (len) | |
633 | *val = (int)vals[i].u.f; | |
634 | } | |
635 | ||
636 | return 0; | |
637 | ||
638 | } | |
639 | ||
b9921d1a DZ |
640 | static int find_earliest_io(struct blktrace_cursor *bcs, int nr_logs) |
641 | { | |
642 | __u64 time = ~(__u64)0; | |
643 | int idx = 0, i; | |
644 | ||
645 | for (i = 0; i < nr_logs; i++) { | |
646 | if (bcs[i].t.time < time) { | |
647 | time = bcs[i].t.time; | |
648 | idx = i; | |
649 | } | |
650 | } | |
651 | ||
652 | return idx; | |
653 | } | |
654 | ||
655 | static void merge_finish_file(struct blktrace_cursor *bcs, int i, int *nr_logs) | |
656 | { | |
55bfd8c8 DZ |
657 | bcs[i].iter++; |
658 | if (bcs[i].iter < bcs[i].nr_iter) { | |
659 | lseek(bcs[i].fd, 0, SEEK_SET); | |
660 | return; | |
661 | } | |
662 | ||
b9921d1a DZ |
663 | *nr_logs -= 1; |
664 | ||
665 | /* close file */ | |
666 | fifo_free(bcs[i].fifo); | |
667 | close(bcs[i].fd); | |
668 | ||
669 | /* keep active files contiguous */ | |
670 | memmove(&bcs[i], &bcs[*nr_logs], sizeof(bcs[i])); | |
671 | } | |
672 | ||
673 | static int read_trace(struct thread_data *td, struct blktrace_cursor *bc) | |
674 | { | |
675 | int ret = 0; | |
676 | struct blk_io_trace *t = &bc->t; | |
677 | ||
678 | read_skip: | |
679 | /* read an io trace */ | |
680 | ret = trace_fifo_get(td, bc->fifo, bc->fd, t, sizeof(*t)); | |
55bfd8c8 DZ |
681 | if (ret < 0) { |
682 | return ret; | |
683 | } else if (!ret) { | |
684 | if (!bc->length) | |
685 | bc->length = bc->t.time; | |
b9921d1a DZ |
686 | return ret; |
687 | } else if (ret < (int) sizeof(*t)) { | |
688 | log_err("fio: short fifo get\n"); | |
689 | return -1; | |
690 | } | |
691 | ||
692 | if (bc->swap) | |
693 | byteswap_trace(t); | |
694 | ||
695 | /* skip over actions that fio does not care about */ | |
696 | if ((t->action & 0xffff) != __BLK_TA_QUEUE || | |
697 | t_get_ddir(t) == DDIR_INVAL) { | |
698 | ret = discard_pdu(td, bc->fifo, bc->fd, t); | |
699 | if (ret < 0) { | |
700 | td_verror(td, ret, "blktrace lseek"); | |
701 | return ret; | |
702 | } else if (t->pdu_len != ret) { | |
703 | log_err("fio: discarded %d of %d\n", ret, | |
704 | t->pdu_len); | |
705 | return -1; | |
706 | } | |
707 | goto read_skip; | |
708 | } | |
709 | ||
55bfd8c8 | 710 | t->time = (t->time + bc->iter * bc->length) * bc->scalar / 100; |
87a48ada | 711 | |
b9921d1a DZ |
712 | return ret; |
713 | } | |
714 | ||
715 | static int write_trace(FILE *fp, struct blk_io_trace *t) | |
716 | { | |
717 | /* pdu is not used so just write out only the io trace */ | |
718 | t->pdu_len = 0; | |
719 | return fwrite((void *)t, sizeof(*t), 1, fp); | |
720 | } | |
721 | ||
722 | int merge_blktrace_iologs(struct thread_data *td) | |
723 | { | |
724 | int nr_logs = get_max_str_idx(td->o.read_iolog_file); | |
725 | struct blktrace_cursor *bcs = malloc(sizeof(struct blktrace_cursor) * | |
726 | nr_logs); | |
727 | struct blktrace_cursor *bc; | |
728 | FILE *merge_fp; | |
729 | char *str, *ptr, *name, *merge_buf; | |
730 | int i, ret; | |
731 | ||
87a48ada DZ |
732 | ret = init_merge_param_list(td->o.merge_blktrace_scalars, bcs, nr_logs, |
733 | 100, offsetof(struct blktrace_cursor, | |
734 | scalar)); | |
735 | if (ret) { | |
736 | log_err("fio: merge_blktrace_scalars(%d) != nr_logs(%d)\n", | |
737 | ret, nr_logs); | |
738 | goto err_param; | |
739 | } | |
740 | ||
55bfd8c8 DZ |
741 | ret = init_merge_param_list(td->o.merge_blktrace_iters, bcs, nr_logs, |
742 | 1, offsetof(struct blktrace_cursor, | |
743 | nr_iter)); | |
744 | if (ret) { | |
745 | log_err("fio: merge_blktrace_iters(%d) != nr_logs(%d)\n", | |
746 | ret, nr_logs); | |
747 | goto err_param; | |
748 | } | |
749 | ||
b9921d1a DZ |
750 | /* setup output file */ |
751 | merge_fp = fopen(td->o.merge_blktrace_file, "w"); | |
752 | merge_buf = malloc(128 * 1024); | |
753 | ret = setvbuf(merge_fp, merge_buf, _IOFBF, 128 * 1024); | |
754 | if (ret) | |
755 | goto err_out_file; | |
756 | ||
757 | /* setup input files */ | |
758 | str = ptr = strdup(td->o.read_iolog_file); | |
759 | nr_logs = 0; | |
760 | for (i = 0; (name = get_next_str(&ptr)) != NULL; i++) { | |
761 | bcs[i].fd = open(name, O_RDONLY); | |
762 | if (bcs[i].fd < 0) { | |
763 | log_err("fio: could not open file: %s\n", name); | |
764 | ret = bcs[i].fd; | |
765 | goto err_file; | |
766 | } | |
767 | bcs[i].fifo = fifo_alloc(TRACE_FIFO_SIZE); | |
768 | nr_logs++; | |
769 | ||
770 | if (!is_blktrace(name, &bcs[i].swap)) { | |
771 | log_err("fio: file is not a blktrace: %s\n", name); | |
772 | goto err_file; | |
773 | } | |
774 | ||
775 | ret = read_trace(td, &bcs[i]); | |
776 | if (ret < 0) { | |
777 | goto err_file; | |
778 | } else if (!ret) { | |
779 | merge_finish_file(bcs, i, &nr_logs); | |
780 | i--; | |
781 | } | |
782 | } | |
783 | free(str); | |
784 | ||
785 | /* merge files */ | |
786 | while (nr_logs) { | |
787 | i = find_earliest_io(bcs, nr_logs); | |
788 | bc = &bcs[i]; | |
789 | /* skip over the pdu */ | |
790 | ret = discard_pdu(td, bc->fifo, bc->fd, &bc->t); | |
791 | if (ret < 0) { | |
792 | td_verror(td, ret, "blktrace lseek"); | |
793 | goto err_file; | |
794 | } else if (bc->t.pdu_len != ret) { | |
795 | log_err("fio: discarded %d of %d\n", ret, | |
796 | bc->t.pdu_len); | |
797 | goto err_file; | |
798 | } | |
799 | ||
800 | ret = write_trace(merge_fp, &bc->t); | |
801 | ret = read_trace(td, bc); | |
802 | if (ret < 0) | |
803 | goto err_file; | |
804 | else if (!ret) | |
805 | merge_finish_file(bcs, i, &nr_logs); | |
806 | } | |
807 | ||
808 | /* set iolog file to read from the newly merged file */ | |
809 | td->o.read_iolog_file = td->o.merge_blktrace_file; | |
810 | ret = 0; | |
811 | ||
812 | err_file: | |
813 | /* cleanup */ | |
814 | for (i = 0; i < nr_logs; i++) { | |
815 | fifo_free(bcs[i].fifo); | |
816 | close(bcs[i].fd); | |
817 | } | |
818 | err_out_file: | |
819 | fflush(merge_fp); | |
820 | fclose(merge_fp); | |
87a48ada | 821 | err_param: |
b9921d1a DZ |
822 | free(bcs); |
823 | ||
824 | return ret; | |
825 | } |