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> |
8c1fdf04 | 7 | |
01743ee1 | 8 | #include "flist.h" |
fb7b71a3 | 9 | #include "fio.h" |
a3e59412 | 10 | #include "blktrace.h" |
fb7b71a3 | 11 | #include "blktrace_api.h" |
984f30c9 | 12 | #include "oslib/linux-dev-lookup.h" |
fb7b71a3 | 13 | |
2da7df1d | 14 | #define TRACE_FIFO_SIZE 8192 |
e2887563 JA |
15 | |
16 | /* | |
17 | * fifo refill frontend, to avoid reading data in trace sized bites | |
18 | */ | |
19 | static int refill_fifo(struct thread_data *td, struct fifo *fifo, int fd) | |
20 | { | |
21 | char buf[TRACE_FIFO_SIZE]; | |
f12b323f | 22 | unsigned int total; |
e2887563 JA |
23 | int ret; |
24 | ||
f12b323f JA |
25 | total = sizeof(buf); |
26 | if (total > fifo_room(fifo)) | |
27 | total = fifo_room(fifo); | |
e2887563 | 28 | |
f12b323f JA |
29 | ret = read(fd, buf, total); |
30 | if (ret < 0) { | |
874a61d0 BVA |
31 | int read_err = errno; |
32 | ||
33 | assert(read_err > 0); | |
34 | td_verror(td, read_err, "read blktrace file"); | |
35 | return -read_err; | |
e2887563 JA |
36 | } |
37 | ||
f12b323f JA |
38 | if (ret > 0) |
39 | ret = fifo_put(fifo, buf, ret); | |
40 | ||
bd6f78b2 | 41 | dprint(FD_BLKTRACE, "refill: filled %d bytes\n", ret); |
f12b323f | 42 | return ret; |
e2887563 JA |
43 | } |
44 | ||
45 | /* | |
46 | * Retrieve 'len' bytes from the fifo, refilling if necessary. | |
47 | */ | |
48 | static int trace_fifo_get(struct thread_data *td, struct fifo *fifo, int fd, | |
49 | void *buf, unsigned int len) | |
50 | { | |
f12b323f JA |
51 | if (fifo_len(fifo) < len) { |
52 | int ret = refill_fifo(td, fifo, fd); | |
e2887563 | 53 | |
f12b323f JA |
54 | if (ret < 0) |
55 | return ret; | |
56 | } | |
e2887563 JA |
57 | |
58 | return fifo_get(fifo, buf, len); | |
59 | } | |
60 | ||
8c1fdf04 JA |
61 | /* |
62 | * Just discard the pdu by seeking past it. | |
63 | */ | |
f12b323f JA |
64 | static int discard_pdu(struct thread_data *td, struct fifo *fifo, int fd, |
65 | struct blk_io_trace *t) | |
fb7b71a3 JA |
66 | { |
67 | if (t->pdu_len == 0) | |
68 | return 0; | |
69 | ||
bd6f78b2 | 70 | dprint(FD_BLKTRACE, "discard pdu len %u\n", t->pdu_len); |
f12b323f | 71 | return trace_fifo_get(td, fifo, fd, NULL, t->pdu_len); |
fb7b71a3 JA |
72 | } |
73 | ||
8c1fdf04 JA |
74 | /* |
75 | * Check if this is a blktrace binary data file. We read a single trace | |
76 | * into memory and check for the magic signature. | |
77 | */ | |
b153f94a | 78 | bool is_blktrace(const char *filename, int *need_swap) |
fb7b71a3 JA |
79 | { |
80 | struct blk_io_trace t; | |
81 | int fd, ret; | |
82 | ||
83 | fd = open(filename, O_RDONLY); | |
4dced407 | 84 | if (fd < 0) |
b153f94a | 85 | return false; |
fb7b71a3 JA |
86 | |
87 | ret = read(fd, &t, sizeof(t)); | |
88 | close(fd); | |
89 | ||
90 | if (ret < 0) { | |
91 | perror("read blktrace"); | |
b153f94a | 92 | return false; |
fb7b71a3 JA |
93 | } else if (ret != sizeof(t)) { |
94 | log_err("fio: short read on blktrace file\n"); | |
b153f94a | 95 | return false; |
fb7b71a3 JA |
96 | } |
97 | ||
d95b34a6 JA |
98 | if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { |
99 | *need_swap = 0; | |
b153f94a | 100 | return true; |
d95b34a6 JA |
101 | } |
102 | ||
103 | /* | |
104 | * Maybe it needs to be endian swapped... | |
105 | */ | |
106 | t.magic = fio_swap32(t.magic); | |
107 | if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) { | |
108 | *need_swap = 1; | |
b153f94a | 109 | return true; |
d95b34a6 | 110 | } |
fb7b71a3 | 111 | |
b153f94a | 112 | return false; |
fb7b71a3 JA |
113 | } |
114 | ||
c69aa91f JA |
115 | #define FMINORBITS 20 |
116 | #define FMINORMASK ((1U << FMINORBITS) - 1) | |
117 | #define FMAJOR(dev) ((unsigned int) ((dev) >> FMINORBITS)) | |
118 | #define FMINOR(dev) ((unsigned int) ((dev) & FMINORMASK)) | |
eeb9c2aa | 119 | |
89ac1d48 | 120 | static void trace_add_open_close_event(struct thread_data *td, int fileno, enum file_log_act action) |
691c8fb0 JA |
121 | { |
122 | struct io_piece *ipo; | |
123 | ||
124 | ipo = calloc(1, sizeof(*ipo)); | |
0d29de83 | 125 | init_ipo(ipo); |
691c8fb0 JA |
126 | |
127 | ipo->ddir = DDIR_INVAL; | |
128 | ipo->fileno = fileno; | |
89ac1d48 | 129 | ipo->file_action = action; |
01743ee1 | 130 | flist_add_tail(&ipo->list, &td->io_log_list); |
691c8fb0 JA |
131 | } |
132 | ||
6aaf98e9 | 133 | static int trace_add_file(struct thread_data *td, __u32 device) |
5e6c2067 | 134 | { |
6aaf98e9 | 135 | static unsigned int last_maj, last_min, last_fileno; |
c69aa91f JA |
136 | unsigned int maj = FMAJOR(device); |
137 | unsigned int min = FMINOR(device); | |
5e6c2067 | 138 | struct fio_file *f; |
26e616d0 | 139 | char dev[256]; |
6aaf98e9 | 140 | unsigned int i; |
5e6c2067 | 141 | |
6aaf98e9 | 142 | if (last_maj == maj && last_min == min) |
89ac1d48 | 143 | return last_fileno; |
5e6c2067 JA |
144 | |
145 | last_maj = maj; | |
146 | last_min = min; | |
147 | ||
148 | /* | |
149 | * check for this file in our list | |
150 | */ | |
6aaf98e9 | 151 | for_each_file(td, f, i) |
89ac1d48 SL |
152 | if (f->major == maj && f->minor == min) { |
153 | last_fileno = f->fileno; | |
6aaf98e9 | 154 | return last_fileno; |
89ac1d48 | 155 | } |
5e6c2067 JA |
156 | |
157 | strcpy(dev, "/dev"); | |
40bafa33 | 158 | if (blktrace_lookup_device(td->o.replay_redirect, dev, maj, min)) { |
691c8fb0 JA |
159 | int fileno; |
160 | ||
40bafa33 JA |
161 | if (td->o.replay_redirect) |
162 | dprint(FD_BLKTRACE, "device lookup: %d/%d\n overridden" | |
163 | " with: %s\n", maj, min, | |
164 | td->o.replay_redirect); | |
165 | else | |
166 | dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj, min); | |
167 | ||
bd6f78b2 | 168 | dprint(FD_BLKTRACE, "add devices %s\n", dev); |
49ffb4a2 | 169 | fileno = add_file_exclusive(td, dev); |
b53f2c54 | 170 | td->o.open_files++; |
5903e7b7 JA |
171 | td->files[fileno]->major = maj; |
172 | td->files[fileno]->minor = min; | |
89ac1d48 SL |
173 | trace_add_open_close_event(td, fileno, FIO_LOG_OPEN_FILE); |
174 | last_fileno = fileno; | |
bd6f78b2 | 175 | } |
f01b34ae | 176 | |
89ac1d48 | 177 | return last_fileno; |
5e6c2067 JA |
178 | } |
179 | ||
0c63576e JA |
180 | static void t_bytes_align(struct thread_options *o, struct blk_io_trace *t) |
181 | { | |
182 | if (!o->replay_align) | |
183 | return; | |
184 | ||
185 | t->bytes = (t->bytes + o->replay_align - 1) & ~(o->replay_align - 1); | |
186 | } | |
187 | ||
8c1fdf04 JA |
188 | /* |
189 | * Store blk_io_trace data in an ipo for later retrieval. | |
190 | */ | |
fdefd987 | 191 | static void store_ipo(struct thread_data *td, unsigned long long offset, |
89ac1d48 | 192 | unsigned int bytes, int rw, unsigned long long ttime, |
6aaf98e9 | 193 | int fileno) |
fdefd987 | 194 | { |
8812d7f2 | 195 | struct io_piece *ipo; |
fdefd987 | 196 | |
8812d7f2 | 197 | ipo = calloc(1, sizeof(*ipo)); |
0d29de83 JA |
198 | init_ipo(ipo); |
199 | ||
6aaf98e9 | 200 | ipo->offset = offset * 512; |
0c63576e JA |
201 | if (td->o.replay_scale) |
202 | ipo->offset = ipo->offset / td->o.replay_scale; | |
a79f17bf | 203 | ipo_bytes_align(td->o.replay_align, ipo); |
fdefd987 | 204 | ipo->len = bytes; |
8c1fdf04 | 205 | ipo->delay = ttime / 1000; |
fdefd987 JA |
206 | if (rw) |
207 | ipo->ddir = DDIR_WRITE; | |
208 | else | |
209 | ipo->ddir = DDIR_READ; | |
89ac1d48 | 210 | ipo->fileno = fileno; |
fdefd987 | 211 | |
bd6f78b2 JA |
212 | dprint(FD_BLKTRACE, "store ddir=%d, off=%llu, len=%lu, delay=%lu\n", |
213 | ipo->ddir, ipo->offset, | |
214 | ipo->len, ipo->delay); | |
691c8fb0 | 215 | queue_io_piece(td, ipo); |
fdefd987 JA |
216 | } |
217 | ||
0b9d69ec | 218 | static void handle_trace_notify(struct blk_io_trace *t) |
cd991b9e | 219 | { |
691c8fb0 JA |
220 | switch (t->action) { |
221 | case BLK_TN_PROCESS: | |
24653680 | 222 | dprint(FD_BLKTRACE, "got process notify: %x, %d\n", |
d95b34a6 | 223 | t->action, t->pid); |
691c8fb0 JA |
224 | break; |
225 | case BLK_TN_TIMESTAMP: | |
24653680 | 226 | dprint(FD_BLKTRACE, "got timestamp notify: %x, %d\n", |
d95b34a6 | 227 | t->action, t->pid); |
691c8fb0 | 228 | break; |
ff58fced JA |
229 | case BLK_TN_MESSAGE: |
230 | break; | |
691c8fb0 JA |
231 | default: |
232 | dprint(FD_BLKTRACE, "unknown trace act %x\n", t->action); | |
233 | break; | |
234 | } | |
235 | } | |
5b3023b8 | 236 | |
24653680 JA |
237 | static void handle_trace_discard(struct thread_data *td, |
238 | struct blk_io_trace *t, | |
239 | unsigned long long ttime, | |
6aaf98e9 | 240 | unsigned long *ios, unsigned int *bs) |
ff58fced | 241 | { |
8812d7f2 | 242 | struct io_piece *ipo; |
89ac1d48 | 243 | int fileno; |
ff58fced | 244 | |
d7235efb JA |
245 | if (td->o.replay_skip & (1u << DDIR_TRIM)) |
246 | return; | |
247 | ||
8812d7f2 | 248 | ipo = calloc(1, sizeof(*ipo)); |
0d29de83 | 249 | init_ipo(ipo); |
6aaf98e9 | 250 | fileno = trace_add_file(td, t->device); |
ff58fced | 251 | |
24653680 | 252 | ios[DDIR_TRIM]++; |
6aaf98e9 DZ |
253 | if (t->bytes > bs[DDIR_TRIM]) |
254 | bs[DDIR_TRIM] = t->bytes; | |
24653680 | 255 | |
ff58fced JA |
256 | td->o.size += t->bytes; |
257 | ||
ff58fced JA |
258 | INIT_FLIST_HEAD(&ipo->list); |
259 | ||
6aaf98e9 | 260 | ipo->offset = t->sector * 512; |
0c63576e JA |
261 | if (td->o.replay_scale) |
262 | ipo->offset = ipo->offset / td->o.replay_scale; | |
a79f17bf | 263 | ipo_bytes_align(td->o.replay_align, ipo); |
ff58fced JA |
264 | ipo->len = t->bytes; |
265 | ipo->delay = ttime / 1000; | |
266 | ipo->ddir = DDIR_TRIM; | |
89ac1d48 | 267 | ipo->fileno = fileno; |
ff58fced JA |
268 | |
269 | dprint(FD_BLKTRACE, "store discard, off=%llu, len=%lu, delay=%lu\n", | |
270 | ipo->offset, ipo->len, | |
271 | ipo->delay); | |
272 | queue_io_piece(td, ipo); | |
273 | } | |
274 | ||
19a8064e JA |
275 | static void dump_trace(struct blk_io_trace *t) |
276 | { | |
277 | log_err("blktrace: ignoring zero byte trace: action=%x\n", t->action); | |
278 | } | |
279 | ||
691c8fb0 JA |
280 | static void handle_trace_fs(struct thread_data *td, struct blk_io_trace *t, |
281 | unsigned long long ttime, unsigned long *ios, | |
6aaf98e9 | 282 | unsigned int *bs) |
691c8fb0 JA |
283 | { |
284 | int rw; | |
89ac1d48 | 285 | int fileno; |
5b3023b8 | 286 | |
6aaf98e9 | 287 | fileno = trace_add_file(td, t->device); |
5b3023b8 JA |
288 | |
289 | rw = (t->action & BLK_TC_ACT(BLK_TC_WRITE)) != 0; | |
290 | ||
d7235efb JA |
291 | if (rw) { |
292 | if (td->o.replay_skip & (1u << DDIR_WRITE)) | |
293 | return; | |
294 | } else { | |
295 | if (td->o.replay_skip & (1u << DDIR_READ)) | |
296 | return; | |
297 | } | |
298 | ||
19a8064e JA |
299 | if (!t->bytes) { |
300 | if (!fio_did_warn(FIO_WARN_BTRACE_ZERO)) | |
301 | dump_trace(t); | |
302 | return; | |
303 | } | |
c1f22c21 | 304 | |
6aaf98e9 DZ |
305 | if (t->bytes > bs[rw]) |
306 | bs[rw] = t->bytes; | |
5b3023b8 JA |
307 | |
308 | ios[rw]++; | |
309 | td->o.size += t->bytes; | |
6aaf98e9 | 310 | store_ipo(td, t->sector, t->bytes, rw, ttime, fileno); |
cd991b9e JA |
311 | } |
312 | ||
65c42cc8 | 313 | static void handle_trace_flush(struct thread_data *td, struct blk_io_trace *t, |
811f5421 | 314 | unsigned long long ttime, unsigned long *ios) |
65c42cc8 JA |
315 | { |
316 | struct io_piece *ipo; | |
65c42cc8 JA |
317 | int fileno; |
318 | ||
d7235efb JA |
319 | if (td->o.replay_skip & (1u << DDIR_SYNC)) |
320 | return; | |
321 | ||
65c42cc8 JA |
322 | ipo = calloc(1, sizeof(*ipo)); |
323 | init_ipo(ipo); | |
6aaf98e9 | 324 | fileno = trace_add_file(td, t->device); |
65c42cc8 JA |
325 | |
326 | ipo->delay = ttime / 1000; | |
327 | ipo->ddir = DDIR_SYNC; | |
328 | ipo->fileno = fileno; | |
329 | ||
811f5421 | 330 | ios[DDIR_SYNC]++; |
65c42cc8 JA |
331 | dprint(FD_BLKTRACE, "store flush delay=%lu\n", ipo->delay); |
332 | queue_io_piece(td, ipo); | |
333 | } | |
334 | ||
691c8fb0 JA |
335 | /* |
336 | * We only care for queue traces, most of the others are side effects | |
337 | * due to internal workings of the block layer. | |
338 | */ | |
339 | static void handle_trace(struct thread_data *td, struct blk_io_trace *t, | |
24653680 | 340 | unsigned long *ios, unsigned int *bs) |
691c8fb0 | 341 | { |
24653680 | 342 | static unsigned long long last_ttime; |
0c63576e | 343 | unsigned long long delay = 0; |
24653680 | 344 | |
691c8fb0 JA |
345 | if ((t->action & 0xffff) != __BLK_TA_QUEUE) |
346 | return; | |
24653680 JA |
347 | |
348 | if (!(t->action & BLK_TC_ACT(BLK_TC_NOTIFY))) { | |
6dd7fa77 | 349 | if (!last_ttime || td->o.no_stall) |
24653680 | 350 | delay = 0; |
6dd7fa77 | 351 | else if (td->o.replay_time_scale == 100) |
24653680 | 352 | delay = t->time - last_ttime; |
6dd7fa77 JA |
353 | else { |
354 | double tmp = t->time - last_ttime; | |
355 | double scale; | |
356 | ||
357 | scale = (double) 100.0 / (double) td->o.replay_time_scale; | |
358 | tmp *= scale; | |
359 | delay = tmp; | |
24653680 | 360 | } |
6dd7fa77 | 361 | last_ttime = t->time; |
24653680 | 362 | } |
691c8fb0 | 363 | |
0c63576e JA |
364 | t_bytes_align(&td->o, t); |
365 | ||
691c8fb0 | 366 | if (t->action & BLK_TC_ACT(BLK_TC_NOTIFY)) |
aec2de20 | 367 | handle_trace_notify(t); |
ff58fced | 368 | else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD)) |
24653680 | 369 | handle_trace_discard(td, t, delay, ios, bs); |
65c42cc8 | 370 | else if (t->action & BLK_TC_ACT(BLK_TC_FLUSH)) |
811f5421 | 371 | handle_trace_flush(td, t, delay, ios); |
691c8fb0 | 372 | else |
24653680 | 373 | handle_trace_fs(td, t, delay, ios, bs); |
691c8fb0 JA |
374 | } |
375 | ||
d95b34a6 JA |
376 | static void byteswap_trace(struct blk_io_trace *t) |
377 | { | |
378 | t->magic = fio_swap32(t->magic); | |
379 | t->sequence = fio_swap32(t->sequence); | |
380 | t->time = fio_swap64(t->time); | |
381 | t->sector = fio_swap64(t->sector); | |
382 | t->bytes = fio_swap32(t->bytes); | |
383 | t->action = fio_swap32(t->action); | |
384 | t->pid = fio_swap32(t->pid); | |
385 | t->device = fio_swap32(t->device); | |
386 | t->cpu = fio_swap32(t->cpu); | |
387 | t->error = fio_swap16(t->error); | |
388 | t->pdu_len = fio_swap16(t->pdu_len); | |
389 | } | |
390 | ||
b153f94a | 391 | static bool t_is_write(struct blk_io_trace *t) |
24653680 JA |
392 | { |
393 | return (t->action & BLK_TC_ACT(BLK_TC_WRITE | BLK_TC_DISCARD)) != 0; | |
394 | } | |
395 | ||
a6eaf6c9 JA |
396 | static enum fio_ddir t_get_ddir(struct blk_io_trace *t) |
397 | { | |
398 | if (t->action & BLK_TC_ACT(BLK_TC_READ)) | |
399 | return DDIR_READ; | |
400 | else if (t->action & BLK_TC_ACT(BLK_TC_WRITE)) | |
401 | return DDIR_WRITE; | |
402 | else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD)) | |
403 | return DDIR_TRIM; | |
404 | ||
405 | return DDIR_INVAL; | |
406 | } | |
407 | ||
408 | static void depth_inc(struct blk_io_trace *t, int *depth) | |
409 | { | |
410 | enum fio_ddir ddir; | |
411 | ||
412 | ddir = t_get_ddir(t); | |
413 | if (ddir != DDIR_INVAL) | |
414 | depth[ddir]++; | |
415 | } | |
416 | ||
417 | static void depth_dec(struct blk_io_trace *t, int *depth) | |
418 | { | |
419 | enum fio_ddir ddir; | |
420 | ||
421 | ddir = t_get_ddir(t); | |
422 | if (ddir != DDIR_INVAL) | |
423 | depth[ddir]--; | |
424 | } | |
425 | ||
426 | static void depth_end(struct blk_io_trace *t, int *this_depth, int *depth) | |
427 | { | |
428 | enum fio_ddir ddir = DDIR_INVAL; | |
429 | ||
430 | ddir = t_get_ddir(t); | |
431 | if (ddir != DDIR_INVAL) { | |
432 | depth[ddir] = max(depth[ddir], this_depth[ddir]); | |
433 | this_depth[ddir] = 0; | |
434 | } | |
435 | } | |
436 | ||
8c1fdf04 JA |
437 | /* |
438 | * Load a blktrace file by reading all the blk_io_trace entries, and storing | |
439 | * them as io_pieces like the fio text version would do. | |
440 | */ | |
b153f94a | 441 | bool load_blktrace(struct thread_data *td, const char *filename, int need_swap) |
fb7b71a3 JA |
442 | { |
443 | struct blk_io_trace t; | |
811f5421 JA |
444 | unsigned long ios[DDIR_RWDIR_SYNC_CNT] = { }; |
445 | unsigned int rw_bs[DDIR_RWDIR_CNT] = { }; | |
446 | unsigned long skipped_writes; | |
e2887563 | 447 | struct fifo *fifo; |
811f5421 | 448 | int fd, i, old_state, max_depth; |
89ac1d48 | 449 | struct fio_file *f; |
811f5421 JA |
450 | int this_depth[DDIR_RWDIR_CNT] = { }; |
451 | int depth[DDIR_RWDIR_CNT] = { }; | |
fb7b71a3 JA |
452 | |
453 | fd = open(filename, O_RDONLY); | |
454 | if (fd < 0) { | |
455 | td_verror(td, errno, "open blktrace file"); | |
b153f94a | 456 | return false; |
fb7b71a3 JA |
457 | } |
458 | ||
e2887563 JA |
459 | fifo = fifo_alloc(TRACE_FIFO_SIZE); |
460 | ||
8edd973d | 461 | old_state = td_bump_runstate(td, TD_SETTING_UP); |
5903e7b7 | 462 | |
6df8adaa | 463 | td->o.size = 0; |
4241ea8f | 464 | skipped_writes = 0; |
fb7b71a3 | 465 | do { |
e2887563 | 466 | int ret = trace_fifo_get(td, fifo, fd, &t, sizeof(t)); |
fb7b71a3 | 467 | |
e2887563 | 468 | if (ret < 0) |
8c1fdf04 | 469 | goto err; |
e2887563 JA |
470 | else if (!ret) |
471 | break; | |
472 | else if (ret < (int) sizeof(t)) { | |
473 | log_err("fio: short fifo get\n"); | |
fb7b71a3 | 474 | break; |
fb7b71a3 JA |
475 | } |
476 | ||
d95b34a6 JA |
477 | if (need_swap) |
478 | byteswap_trace(&t); | |
479 | ||
fb7b71a3 | 480 | if ((t.magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) { |
5ec10eaa JA |
481 | log_err("fio: bad magic in blktrace data: %x\n", |
482 | t.magic); | |
8c1fdf04 | 483 | goto err; |
fb7b71a3 JA |
484 | } |
485 | if ((t.magic & 0xff) != BLK_IO_TRACE_VERSION) { | |
5ec10eaa JA |
486 | log_err("fio: bad blktrace version %d\n", |
487 | t.magic & 0xff); | |
8c1fdf04 | 488 | goto err; |
fb7b71a3 | 489 | } |
f12b323f JA |
490 | ret = discard_pdu(td, fifo, fd, &t); |
491 | if (ret < 0) { | |
874a61d0 | 492 | td_verror(td, -ret, "blktrace lseek"); |
8c1fdf04 | 493 | goto err; |
f12b323f JA |
494 | } else if (t.pdu_len != ret) { |
495 | log_err("fio: discarded %d of %d\n", ret, t.pdu_len); | |
496 | goto err; | |
fb7b71a3 | 497 | } |
691c8fb0 | 498 | if ((t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) == 0) { |
eb5fdcf1 | 499 | if ((t.action & 0xffff) == __BLK_TA_QUEUE) |
a6eaf6c9 JA |
500 | depth_inc(&t, this_depth); |
501 | else if (((t.action & 0xffff) == __BLK_TA_BACKMERGE) || | |
502 | ((t.action & 0xffff) == __BLK_TA_FRONTMERGE)) | |
503 | depth_dec(&t, this_depth); | |
504 | else if ((t.action & 0xffff) == __BLK_TA_COMPLETE) | |
505 | depth_end(&t, this_depth, depth); | |
691c8fb0 | 506 | |
24653680 | 507 | if (t_is_write(&t) && read_only) { |
691c8fb0 | 508 | skipped_writes++; |
24653680 | 509 | continue; |
64bbb865 | 510 | } |
a6edd638 | 511 | } |
24653680 JA |
512 | |
513 | handle_trace(td, &t, ios, rw_bs); | |
fb7b71a3 JA |
514 | } while (1); |
515 | ||
3643a1f2 | 516 | for_each_file(td, f, i) |
89ac1d48 | 517 | trace_add_open_close_event(td, f->fileno, FIO_LOG_CLOSE_FILE); |
89ac1d48 | 518 | |
38470f85 | 519 | fifo_free(fifo); |
fb7b71a3 | 520 | close(fd); |
8c1fdf04 | 521 | |
8edd973d | 522 | td_restore_runstate(td, old_state); |
5903e7b7 | 523 | |
f01b34ae JA |
524 | if (!td->files_index) { |
525 | log_err("fio: did not find replay device(s)\n"); | |
b153f94a | 526 | return false; |
f01b34ae JA |
527 | } |
528 | ||
eb5fdcf1 JA |
529 | /* |
530 | * For stacked devices, we don't always get a COMPLETE event so | |
531 | * the depth grows to insane values. Limit it to something sane(r). | |
532 | */ | |
a6eaf6c9 JA |
533 | max_depth = 0; |
534 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { | |
535 | if (depth[i] > 1024) | |
536 | depth[i] = 1024; | |
537 | else if (!depth[i] && ios[i]) | |
538 | depth[i] = 1; | |
539 | max_depth = max(depth[i], max_depth); | |
540 | } | |
eb5fdcf1 | 541 | |
4241ea8f | 542 | if (skipped_writes) |
5ec10eaa JA |
543 | log_err("fio: %s skips replay of %lu writes due to read-only\n", |
544 | td->o.name, skipped_writes); | |
4241ea8f | 545 | |
811f5421 JA |
546 | if (!ios[DDIR_READ] && !ios[DDIR_WRITE] && !ios[DDIR_TRIM] && |
547 | !ios[DDIR_SYNC]) { | |
8c1fdf04 | 548 | log_err("fio: found no ios in blktrace data\n"); |
b153f94a | 549 | return false; |
252928cb | 550 | } |
551 | ||
552 | td->o.td_ddir = 0; | |
553 | if (ios[DDIR_READ]) { | |
554 | td->o.td_ddir |= TD_DDIR_READ; | |
d84f8d49 | 555 | td->o.max_bs[DDIR_READ] = rw_bs[DDIR_READ]; |
252928cb | 556 | } |
557 | if (ios[DDIR_WRITE]) { | |
558 | td->o.td_ddir |= TD_DDIR_WRITE; | |
d84f8d49 | 559 | td->o.max_bs[DDIR_WRITE] = rw_bs[DDIR_WRITE]; |
252928cb | 560 | } |
561 | if (ios[DDIR_TRIM]) { | |
562 | td->o.td_ddir |= TD_DDIR_TRIM; | |
24653680 | 563 | td->o.max_bs[DDIR_TRIM] = rw_bs[DDIR_TRIM]; |
d84f8d49 | 564 | } |
8c1fdf04 JA |
565 | |
566 | /* | |
567 | * We need to do direct/raw ios to the device, to avoid getting | |
76a00ec6 JA |
568 | * read-ahead in our way. But only do so if the minimum block size |
569 | * is a multiple of 4k, otherwise we don't know if it's safe to do so. | |
8c1fdf04 | 570 | */ |
76a00ec6 | 571 | if (!fio_option_is_set(&td->o, odirect) && !(td_min_bs(td) & 4095)) |
a6eaf6c9 | 572 | td->o.odirect = 1; |
8c1fdf04 | 573 | |
eb5fdcf1 | 574 | /* |
8a16f59b | 575 | * If depth wasn't manually set, use probed depth |
eb5fdcf1 | 576 | */ |
8a16f59b | 577 | if (!fio_option_is_set(&td->o, iodepth)) |
a6eaf6c9 | 578 | td->o.iodepth = td->o.iodepth_low = max_depth; |
eb5fdcf1 | 579 | |
b153f94a | 580 | return true; |
8c1fdf04 JA |
581 | err: |
582 | close(fd); | |
38470f85 | 583 | fifo_free(fifo); |
b153f94a | 584 | return false; |
fb7b71a3 | 585 | } |
b9921d1a | 586 | |
87a48ada DZ |
587 | static int init_merge_param_list(fio_fp64_t *vals, struct blktrace_cursor *bcs, |
588 | int nr_logs, int def, size_t off) | |
589 | { | |
590 | int i = 0, len = 0; | |
591 | ||
592 | while (len < FIO_IO_U_LIST_MAX_LEN && vals[len].u.f != 0.0) | |
593 | len++; | |
594 | ||
595 | if (len && len != nr_logs) | |
596 | return len; | |
597 | ||
598 | for (i = 0; i < nr_logs; i++) { | |
599 | int *val = (int *)((char *)&bcs[i] + off); | |
600 | *val = def; | |
601 | if (len) | |
602 | *val = (int)vals[i].u.f; | |
603 | } | |
604 | ||
605 | return 0; | |
606 | ||
607 | } | |
608 | ||
b9921d1a DZ |
609 | static int find_earliest_io(struct blktrace_cursor *bcs, int nr_logs) |
610 | { | |
611 | __u64 time = ~(__u64)0; | |
612 | int idx = 0, i; | |
613 | ||
614 | for (i = 0; i < nr_logs; i++) { | |
615 | if (bcs[i].t.time < time) { | |
616 | time = bcs[i].t.time; | |
617 | idx = i; | |
618 | } | |
619 | } | |
620 | ||
621 | return idx; | |
622 | } | |
623 | ||
624 | static void merge_finish_file(struct blktrace_cursor *bcs, int i, int *nr_logs) | |
625 | { | |
55bfd8c8 DZ |
626 | bcs[i].iter++; |
627 | if (bcs[i].iter < bcs[i].nr_iter) { | |
628 | lseek(bcs[i].fd, 0, SEEK_SET); | |
629 | return; | |
630 | } | |
631 | ||
b9921d1a DZ |
632 | *nr_logs -= 1; |
633 | ||
634 | /* close file */ | |
635 | fifo_free(bcs[i].fifo); | |
636 | close(bcs[i].fd); | |
637 | ||
638 | /* keep active files contiguous */ | |
639 | memmove(&bcs[i], &bcs[*nr_logs], sizeof(bcs[i])); | |
640 | } | |
641 | ||
642 | static int read_trace(struct thread_data *td, struct blktrace_cursor *bc) | |
643 | { | |
644 | int ret = 0; | |
645 | struct blk_io_trace *t = &bc->t; | |
646 | ||
647 | read_skip: | |
648 | /* read an io trace */ | |
649 | ret = trace_fifo_get(td, bc->fifo, bc->fd, t, sizeof(*t)); | |
55bfd8c8 DZ |
650 | if (ret < 0) { |
651 | return ret; | |
652 | } else if (!ret) { | |
653 | if (!bc->length) | |
654 | bc->length = bc->t.time; | |
b9921d1a DZ |
655 | return ret; |
656 | } else if (ret < (int) sizeof(*t)) { | |
657 | log_err("fio: short fifo get\n"); | |
658 | return -1; | |
659 | } | |
660 | ||
661 | if (bc->swap) | |
662 | byteswap_trace(t); | |
663 | ||
664 | /* skip over actions that fio does not care about */ | |
665 | if ((t->action & 0xffff) != __BLK_TA_QUEUE || | |
666 | t_get_ddir(t) == DDIR_INVAL) { | |
667 | ret = discard_pdu(td, bc->fifo, bc->fd, t); | |
668 | if (ret < 0) { | |
874a61d0 | 669 | td_verror(td, -ret, "blktrace lseek"); |
b9921d1a DZ |
670 | return ret; |
671 | } else if (t->pdu_len != ret) { | |
672 | log_err("fio: discarded %d of %d\n", ret, | |
673 | t->pdu_len); | |
674 | return -1; | |
675 | } | |
676 | goto read_skip; | |
677 | } | |
678 | ||
55bfd8c8 | 679 | t->time = (t->time + bc->iter * bc->length) * bc->scalar / 100; |
87a48ada | 680 | |
b9921d1a DZ |
681 | return ret; |
682 | } | |
683 | ||
684 | static int write_trace(FILE *fp, struct blk_io_trace *t) | |
685 | { | |
686 | /* pdu is not used so just write out only the io trace */ | |
687 | t->pdu_len = 0; | |
688 | return fwrite((void *)t, sizeof(*t), 1, fp); | |
689 | } | |
690 | ||
691 | int merge_blktrace_iologs(struct thread_data *td) | |
692 | { | |
693 | int nr_logs = get_max_str_idx(td->o.read_iolog_file); | |
694 | struct blktrace_cursor *bcs = malloc(sizeof(struct blktrace_cursor) * | |
695 | nr_logs); | |
696 | struct blktrace_cursor *bc; | |
697 | FILE *merge_fp; | |
698 | char *str, *ptr, *name, *merge_buf; | |
699 | int i, ret; | |
700 | ||
87a48ada DZ |
701 | ret = init_merge_param_list(td->o.merge_blktrace_scalars, bcs, nr_logs, |
702 | 100, offsetof(struct blktrace_cursor, | |
703 | scalar)); | |
704 | if (ret) { | |
705 | log_err("fio: merge_blktrace_scalars(%d) != nr_logs(%d)\n", | |
706 | ret, nr_logs); | |
707 | goto err_param; | |
708 | } | |
709 | ||
55bfd8c8 DZ |
710 | ret = init_merge_param_list(td->o.merge_blktrace_iters, bcs, nr_logs, |
711 | 1, offsetof(struct blktrace_cursor, | |
712 | nr_iter)); | |
713 | if (ret) { | |
714 | log_err("fio: merge_blktrace_iters(%d) != nr_logs(%d)\n", | |
715 | ret, nr_logs); | |
716 | goto err_param; | |
717 | } | |
718 | ||
b9921d1a DZ |
719 | /* setup output file */ |
720 | merge_fp = fopen(td->o.merge_blktrace_file, "w"); | |
721 | merge_buf = malloc(128 * 1024); | |
c81ab051 BVA |
722 | if (!merge_buf) |
723 | goto err_out_file; | |
b9921d1a DZ |
724 | ret = setvbuf(merge_fp, merge_buf, _IOFBF, 128 * 1024); |
725 | if (ret) | |
c81ab051 | 726 | goto err_merge_buf; |
b9921d1a DZ |
727 | |
728 | /* setup input files */ | |
729 | str = ptr = strdup(td->o.read_iolog_file); | |
730 | nr_logs = 0; | |
731 | for (i = 0; (name = get_next_str(&ptr)) != NULL; i++) { | |
732 | bcs[i].fd = open(name, O_RDONLY); | |
733 | if (bcs[i].fd < 0) { | |
734 | log_err("fio: could not open file: %s\n", name); | |
735 | ret = bcs[i].fd; | |
2ba46d1b | 736 | free(str); |
b9921d1a DZ |
737 | goto err_file; |
738 | } | |
739 | bcs[i].fifo = fifo_alloc(TRACE_FIFO_SIZE); | |
740 | nr_logs++; | |
741 | ||
742 | if (!is_blktrace(name, &bcs[i].swap)) { | |
743 | log_err("fio: file is not a blktrace: %s\n", name); | |
2ba46d1b | 744 | free(str); |
b9921d1a DZ |
745 | goto err_file; |
746 | } | |
747 | ||
748 | ret = read_trace(td, &bcs[i]); | |
749 | if (ret < 0) { | |
2ba46d1b | 750 | free(str); |
b9921d1a DZ |
751 | goto err_file; |
752 | } else if (!ret) { | |
753 | merge_finish_file(bcs, i, &nr_logs); | |
754 | i--; | |
755 | } | |
756 | } | |
757 | free(str); | |
758 | ||
759 | /* merge files */ | |
760 | while (nr_logs) { | |
761 | i = find_earliest_io(bcs, nr_logs); | |
762 | bc = &bcs[i]; | |
763 | /* skip over the pdu */ | |
764 | ret = discard_pdu(td, bc->fifo, bc->fd, &bc->t); | |
765 | if (ret < 0) { | |
874a61d0 | 766 | td_verror(td, -ret, "blktrace lseek"); |
b9921d1a DZ |
767 | goto err_file; |
768 | } else if (bc->t.pdu_len != ret) { | |
769 | log_err("fio: discarded %d of %d\n", ret, | |
770 | bc->t.pdu_len); | |
771 | goto err_file; | |
772 | } | |
773 | ||
774 | ret = write_trace(merge_fp, &bc->t); | |
775 | ret = read_trace(td, bc); | |
776 | if (ret < 0) | |
777 | goto err_file; | |
778 | else if (!ret) | |
779 | merge_finish_file(bcs, i, &nr_logs); | |
780 | } | |
781 | ||
782 | /* set iolog file to read from the newly merged file */ | |
783 | td->o.read_iolog_file = td->o.merge_blktrace_file; | |
784 | ret = 0; | |
785 | ||
786 | err_file: | |
787 | /* cleanup */ | |
788 | for (i = 0; i < nr_logs; i++) { | |
789 | fifo_free(bcs[i].fifo); | |
790 | close(bcs[i].fd); | |
791 | } | |
c81ab051 BVA |
792 | err_merge_buf: |
793 | free(merge_buf); | |
b9921d1a DZ |
794 | err_out_file: |
795 | fflush(merge_fp); | |
796 | fclose(merge_fp); | |
87a48ada | 797 | err_param: |
b9921d1a DZ |
798 | free(bcs); |
799 | ||
800 | return ret; | |
801 | } |