Commit | Line | Data |
---|---|---|
d956a2cd JA |
1 | /* |
2 | * block queue tracing parse application | |
3 | * | |
4 | * Copyright (C) 2005 Jens Axboe <axboe@suse.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
d0ca268b JA |
21 | #include <sys/types.h> |
22 | #include <sys/stat.h> | |
23 | #include <unistd.h> | |
24 | #include <stdio.h> | |
25 | #include <fcntl.h> | |
26 | #include <stdlib.h> | |
8fc0abbc | 27 | #include <string.h> |
d5396421 | 28 | #include <getopt.h> |
412819ce JA |
29 | #include <errno.h> |
30 | #include <signal.h> | |
d69db225 | 31 | #include <locale.h> |
d0ca268b | 32 | |
8fc0abbc JA |
33 | #include "blktrace.h" |
34 | #include "rbtree.h" | |
d0ca268b | 35 | |
cfab07eb AB |
36 | #define SECONDS(x) ((unsigned long long)(x) / 1000000000) |
37 | #define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000) | |
38 | ||
d5396421 JA |
39 | static int backwards; |
40 | static unsigned long long genesis_time, last_reported_time; | |
41 | ||
42 | struct per_cpu_info { | |
d0ca268b JA |
43 | int cpu; |
44 | int nelems; | |
d0ca268b JA |
45 | |
46 | int fd; | |
87b72777 | 47 | char fname[128]; |
d0ca268b | 48 | |
87b72777 JA |
49 | FILE *ofp; |
50 | char ofname[128]; | |
8fc0abbc | 51 | |
5c017e4b | 52 | unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites; |
afd2d7ad | 53 | unsigned long ireads, iwrites; |
5c017e4b | 54 | unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb; |
afd2d7ad | 55 | unsigned long long iread_kb, iwrite_kb; |
d0ca268b JA |
56 | }; |
57 | ||
79f19470 | 58 | #define S_OPTS "i:o:b:" |
d5396421 JA |
59 | static struct option l_opts[] = { |
60 | { | |
61 | .name = "input", | |
62 | .has_arg = 1, | |
63 | .flag = NULL, | |
64 | .val = 'i' | |
65 | }, | |
66 | { | |
67 | .name = "output", | |
68 | .has_arg = 1, | |
69 | .flag = NULL, | |
70 | .val = 'o' | |
71 | }, | |
79f19470 JA |
72 | { |
73 | .name = "batch", | |
74 | .has_arg = 1, | |
75 | .flag = NULL, | |
76 | .val = 'b' | |
77 | }, | |
d5396421 JA |
78 | { |
79 | .name = NULL, | |
80 | .has_arg = 0, | |
81 | .flag = NULL, | |
82 | .val = 0 | |
83 | } | |
84 | }; | |
85 | ||
8fc0abbc JA |
86 | static struct rb_root rb_root; |
87 | ||
88 | struct trace { | |
89 | struct blk_io_trace *bit; | |
90 | struct rb_node rb_node; | |
91 | }; | |
92 | ||
a718bd37 NS |
93 | static int max_cpus; |
94 | static struct per_cpu_info *per_cpu_info; | |
d0ca268b | 95 | |
87b72777 JA |
96 | static unsigned long long events; |
97 | ||
d5396421 | 98 | static char *dev, *output_name; |
d0ca268b | 99 | |
79f19470 JA |
100 | #define RB_BATCH_DEFAULT (1024) |
101 | static int rb_batch = RB_BATCH_DEFAULT; | |
102 | ||
412819ce JA |
103 | #define is_done() (*(volatile int *)(&done)) |
104 | static volatile int done; | |
105 | ||
a718bd37 NS |
106 | static void resize_cpu_info(int cpuid) |
107 | { | |
108 | int new_space, new_max = cpuid + 1; | |
109 | char *new_start; | |
110 | ||
111 | per_cpu_info = realloc(per_cpu_info, new_max * sizeof(*per_cpu_info)); | |
112 | if (!per_cpu_info) { | |
113 | fprintf(stderr, "Cannot allocate CPU info -- %d x %d bytes\n", | |
114 | new_max, (int) sizeof(*per_cpu_info)); | |
115 | exit(1); | |
116 | } | |
117 | ||
118 | new_start = (char *)per_cpu_info + (max_cpus * sizeof(*per_cpu_info)); | |
119 | new_space = (new_max - max_cpus) * sizeof(*per_cpu_info); | |
120 | memset(new_start, 0, new_space); | |
121 | max_cpus = new_max; | |
122 | } | |
123 | ||
124 | static struct per_cpu_info *get_cpu_info(int cpu) | |
125 | { | |
c499bf38 JA |
126 | struct per_cpu_info *pci; |
127 | ||
a718bd37 NS |
128 | if (cpu >= max_cpus) |
129 | resize_cpu_info(cpu); | |
130 | ||
c499bf38 JA |
131 | /* |
132 | * ->cpu might already be set, but just set it unconditionally | |
133 | */ | |
134 | pci = &per_cpu_info[cpu]; | |
135 | pci->cpu = cpu; | |
136 | ||
137 | return pci; | |
a718bd37 NS |
138 | } |
139 | ||
cfab07eb AB |
140 | static inline void check_time(struct blk_io_trace *bit) |
141 | { | |
142 | unsigned long long this = bit->time; | |
143 | unsigned long long last = last_reported_time; | |
144 | ||
145 | backwards = (this < last) ? 'B' : ' '; | |
146 | last_reported_time = this; | |
147 | } | |
148 | ||
d5396421 | 149 | static inline void account_m(struct per_cpu_info *pci, int rw, |
5c017e4b | 150 | unsigned int bytes) |
d0ca268b JA |
151 | { |
152 | if (rw) { | |
d5396421 JA |
153 | pci->mwrites++; |
154 | pci->qwrite_kb += bytes >> 10; | |
d0ca268b | 155 | } else { |
d5396421 JA |
156 | pci->mreads++; |
157 | pci->qread_kb += bytes >> 10; | |
d0ca268b JA |
158 | } |
159 | } | |
160 | ||
d5396421 | 161 | static inline void account_q(struct per_cpu_info *pci, int rw, |
5c017e4b | 162 | unsigned int bytes) |
d0ca268b JA |
163 | { |
164 | if (rw) { | |
d5396421 JA |
165 | pci->qwrites++; |
166 | pci->qwrite_kb += bytes >> 10; | |
d0ca268b | 167 | } else { |
d5396421 JA |
168 | pci->qreads++; |
169 | pci->qread_kb += bytes >> 10; | |
d0ca268b JA |
170 | } |
171 | } | |
172 | ||
d5396421 | 173 | static inline void account_c(struct per_cpu_info *pci, int rw, |
5c017e4b | 174 | unsigned int bytes) |
d0ca268b JA |
175 | { |
176 | if (rw) { | |
d5396421 JA |
177 | pci->cwrites++; |
178 | pci->cwrite_kb += bytes >> 10; | |
d0ca268b | 179 | } else { |
d5396421 JA |
180 | pci->creads++; |
181 | pci->cread_kb += bytes >> 10; | |
d0ca268b JA |
182 | } |
183 | } | |
184 | ||
d5396421 | 185 | static inline void account_i(struct per_cpu_info *pci, int rw, |
afd2d7ad | 186 | unsigned int bytes) |
187 | { | |
188 | if (rw) { | |
d5396421 JA |
189 | pci->iwrites++; |
190 | pci->iwrite_kb += bytes >> 10; | |
afd2d7ad | 191 | } else { |
d5396421 JA |
192 | pci->ireads++; |
193 | pci->iread_kb += bytes >> 10; | |
afd2d7ad | 194 | } |
195 | } | |
196 | ||
d5396421 | 197 | static void output(struct per_cpu_info *pci, char *s) |
d0ca268b JA |
198 | { |
199 | printf("%s", s); | |
d5396421 JA |
200 | |
201 | if (pci->ofp) | |
33b56019 | 202 | fprintf(pci->ofp, "%s", s); |
d0ca268b JA |
203 | } |
204 | ||
3aabcd89 JA |
205 | static char hstring[256]; |
206 | static char tstring[256]; | |
d0ca268b | 207 | |
d5396421 JA |
208 | static inline char *setup_header(struct per_cpu_info *pci, |
209 | struct blk_io_trace *t, char act) | |
d0ca268b JA |
210 | { |
211 | int w = t->action & BLK_TC_ACT(BLK_TC_WRITE); | |
212 | int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER); | |
213 | int s = t->action & BLK_TC_ACT(BLK_TC_SYNC); | |
214 | char rwbs[4]; | |
215 | int i = 0; | |
216 | ||
217 | if (w) | |
218 | rwbs[i++] = 'W'; | |
219 | else | |
220 | rwbs[i++] = 'R'; | |
221 | if (b) | |
222 | rwbs[i++] = 'B'; | |
223 | if (s) | |
224 | rwbs[i++] = 'S'; | |
225 | ||
226 | rwbs[i] = '\0'; | |
227 | ||
cfab07eb | 228 | sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards, |
d5396421 | 229 | pci->cpu, |
cfab07eb AB |
230 | (unsigned long)t->sequence, SECONDS(t->time), |
231 | NANO_SECONDS(t->time), t->pid, act, rwbs); | |
d0ca268b JA |
232 | |
233 | return hstring; | |
234 | } | |
235 | ||
d5396421 JA |
236 | static void log_complete(struct per_cpu_info *pci, struct blk_io_trace *t, |
237 | char act) | |
d0ca268b | 238 | { |
d5396421 | 239 | sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act), |
d0ca268b | 240 | (unsigned long long)t->sector, t->bytes >> 9, t->error); |
d5396421 | 241 | output(pci, tstring); |
d0ca268b JA |
242 | } |
243 | ||
d5396421 JA |
244 | static void log_queue(struct per_cpu_info *pci, struct blk_io_trace *t, |
245 | char act) | |
d0ca268b | 246 | { |
2955af9d NS |
247 | sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act), |
248 | (unsigned long long)t->sector, t->bytes >> 9, t->comm); | |
d5396421 | 249 | output(pci, tstring); |
d0ca268b JA |
250 | } |
251 | ||
d5396421 JA |
252 | static void log_issue(struct per_cpu_info *pci, struct blk_io_trace *t, |
253 | char act) | |
d0ca268b | 254 | { |
2955af9d NS |
255 | sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act), |
256 | (unsigned long long)t->sector, t->bytes >> 9, t->comm); | |
d5396421 | 257 | output(pci, tstring); |
d0ca268b JA |
258 | } |
259 | ||
d5396421 JA |
260 | static void log_merge(struct per_cpu_info *pci, struct blk_io_trace *t, |
261 | char act) | |
d0ca268b | 262 | { |
2955af9d NS |
263 | sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act), |
264 | (unsigned long long)t->sector, t->bytes >> 9, t->comm); | |
d5396421 | 265 | output(pci, tstring); |
d0ca268b JA |
266 | } |
267 | ||
d5396421 JA |
268 | static void log_generic(struct per_cpu_info *pci, struct blk_io_trace *t, |
269 | char act) | |
d0ca268b | 270 | { |
2955af9d NS |
271 | sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act), |
272 | (unsigned long long)t->sector, t->bytes >> 9, t->comm); | |
d5396421 | 273 | output(pci, tstring); |
d0ca268b JA |
274 | } |
275 | ||
d5396421 | 276 | static int log_pc(struct per_cpu_info *pci, struct blk_io_trace *t, char act) |
d0ca268b | 277 | { |
87b72777 JA |
278 | unsigned char *buf; |
279 | int i; | |
d0ca268b | 280 | |
d5396421 JA |
281 | sprintf(tstring,"%s ", setup_header(pci, t, act)); |
282 | output(pci, tstring); | |
d0ca268b | 283 | |
87b72777 | 284 | buf = (unsigned char *) t + sizeof(*t); |
d0ca268b JA |
285 | for (i = 0; i < t->pdu_len; i++) { |
286 | sprintf(tstring,"%02x ", buf[i]); | |
d5396421 | 287 | output(pci, tstring); |
d0ca268b JA |
288 | } |
289 | ||
290 | if (act == 'C') { | |
2955af9d NS |
291 | sprintf(tstring,"[%d]\n", t->error); |
292 | output(pci, tstring); | |
293 | } else { | |
294 | sprintf(tstring,"[%s]\n", t->comm); | |
d5396421 | 295 | output(pci, tstring); |
d0ca268b | 296 | } |
87b72777 | 297 | return 0; |
d0ca268b JA |
298 | } |
299 | ||
d5396421 | 300 | static int dump_trace_pc(struct blk_io_trace *t, struct per_cpu_info *pci) |
d0ca268b | 301 | { |
87b72777 JA |
302 | int ret = 0; |
303 | ||
d0ca268b JA |
304 | switch (t->action & 0xffff) { |
305 | case __BLK_TA_QUEUE: | |
d5396421 | 306 | log_generic(pci, t, 'Q'); |
d0ca268b JA |
307 | break; |
308 | case __BLK_TA_GETRQ: | |
d5396421 | 309 | log_generic(pci, t, 'G'); |
d0ca268b JA |
310 | break; |
311 | case __BLK_TA_SLEEPRQ: | |
d5396421 | 312 | log_generic(pci, t, 'S'); |
d0ca268b JA |
313 | break; |
314 | case __BLK_TA_REQUEUE: | |
d5396421 | 315 | log_generic(pci, t, 'R'); |
d0ca268b JA |
316 | break; |
317 | case __BLK_TA_ISSUE: | |
d5396421 | 318 | ret = log_pc(pci, t, 'D'); |
d0ca268b JA |
319 | break; |
320 | case __BLK_TA_COMPLETE: | |
d5396421 | 321 | log_pc(pci, t, 'C'); |
d0ca268b JA |
322 | break; |
323 | default: | |
324 | fprintf(stderr, "Bad pc action %x\n", t->action); | |
87b72777 JA |
325 | ret = 1; |
326 | break; | |
d0ca268b JA |
327 | } |
328 | ||
87b72777 | 329 | return ret; |
d0ca268b JA |
330 | } |
331 | ||
d5396421 | 332 | static void dump_trace_fs(struct blk_io_trace *t, struct per_cpu_info *pci) |
d0ca268b JA |
333 | { |
334 | int w = t->action & BLK_TC_ACT(BLK_TC_WRITE); | |
335 | ||
336 | switch (t->action & 0xffff) { | |
337 | case __BLK_TA_QUEUE: | |
d5396421 JA |
338 | account_q(pci, w, t->bytes); |
339 | log_queue(pci, t, 'Q'); | |
d0ca268b JA |
340 | break; |
341 | case __BLK_TA_BACKMERGE: | |
d5396421 JA |
342 | account_m(pci, w, t->bytes); |
343 | log_merge(pci, t, 'M'); | |
d0ca268b JA |
344 | break; |
345 | case __BLK_TA_FRONTMERGE: | |
d5396421 JA |
346 | account_m(pci, w, t->bytes); |
347 | log_merge(pci, t, 'F'); | |
d0ca268b JA |
348 | break; |
349 | case __BLK_TA_GETRQ: | |
d5396421 | 350 | log_generic(pci, t, 'G'); |
d0ca268b JA |
351 | break; |
352 | case __BLK_TA_SLEEPRQ: | |
d5396421 | 353 | log_generic(pci, t, 'S'); |
d0ca268b JA |
354 | break; |
355 | case __BLK_TA_REQUEUE: | |
d5396421 JA |
356 | account_c(pci, w, -t->bytes); |
357 | log_queue(pci, t, 'R'); | |
d0ca268b JA |
358 | break; |
359 | case __BLK_TA_ISSUE: | |
d5396421 JA |
360 | account_i(pci, w, t->bytes); |
361 | log_issue(pci, t, 'D'); | |
d0ca268b JA |
362 | break; |
363 | case __BLK_TA_COMPLETE: | |
d5396421 JA |
364 | account_c(pci, w, t->bytes); |
365 | log_complete(pci, t, 'C'); | |
d0ca268b JA |
366 | break; |
367 | default: | |
368 | fprintf(stderr, "Bad fs action %x\n", t->action); | |
1f79c4a0 | 369 | break; |
d0ca268b | 370 | } |
d0ca268b JA |
371 | } |
372 | ||
d5396421 | 373 | static int dump_trace(struct blk_io_trace *t, struct per_cpu_info *pci) |
d0ca268b | 374 | { |
87b72777 JA |
375 | int ret = 0; |
376 | ||
33b56019 JA |
377 | if (output_name && !pci->ofp) { |
378 | snprintf(pci->ofname, sizeof(pci->ofname) - 1, | |
379 | "%s_log.%d", output_name, pci->cpu); | |
380 | ||
381 | pci->ofp = fopen(pci->ofname, "w"); | |
382 | if (pci->ofp == NULL) { | |
383 | perror(pci->ofname); | |
384 | return 1; | |
385 | } | |
386 | } | |
387 | ||
d0ca268b | 388 | if (t->action & BLK_TC_ACT(BLK_TC_PC)) |
d5396421 | 389 | ret = dump_trace_pc(t, pci); |
d0ca268b | 390 | else |
d5396421 | 391 | dump_trace_fs(t, pci); |
87b72777 JA |
392 | |
393 | events++; | |
394 | return ret; | |
d0ca268b JA |
395 | } |
396 | ||
d5396421 | 397 | static void dump_pci_stats(struct per_cpu_info *pci) |
5c017e4b | 398 | { |
0a6b8fc4 NS |
399 | printf(" Reads Queued: %'8lu, %'8LuKiB\t", pci->qreads, pci->qread_kb); |
400 | printf(" Writes Queued: %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb); | |
401 | ||
402 | printf(" Read Dispatches: %'8lu, %'8LuKiB\t", pci->ireads, pci->iread_kb); | |
403 | printf(" Write Dispatches: %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb); | |
404 | printf(" Reads Completed: %'8lu, %'8LuKiB\t", pci->creads, pci->cread_kb); | |
405 | printf(" Writes Completed: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb); | |
406 | printf(" Read Merges: %'8lu%8c\t", pci->mreads, ' '); | |
407 | ||
408 | printf(" Write Merges: %'8lu\n", pci->mwrites); | |
5c017e4b JA |
409 | } |
410 | ||
d5396421 | 411 | static void show_stats(void) |
d0ca268b | 412 | { |
d5396421 | 413 | struct per_cpu_info foo, *pci; |
412819ce | 414 | int i, pci_events = 0; |
5c017e4b JA |
415 | |
416 | memset(&foo, 0, sizeof(foo)); | |
d0ca268b | 417 | |
a718bd37 | 418 | for (i = 0; i < max_cpus; i++) { |
d5396421 | 419 | pci = &per_cpu_info[i]; |
5c017e4b | 420 | |
d5396421 | 421 | if (!pci->nelems) |
afd2d7ad | 422 | continue; |
423 | ||
d5396421 JA |
424 | foo.qreads += pci->qreads; |
425 | foo.qwrites += pci->qwrites; | |
426 | foo.creads += pci->creads; | |
427 | foo.cwrites += pci->cwrites; | |
428 | foo.mreads += pci->mreads; | |
429 | foo.mwrites += pci->mwrites; | |
430 | foo.qread_kb += pci->qread_kb; | |
431 | foo.qwrite_kb += pci->qwrite_kb; | |
432 | foo.cread_kb += pci->cread_kb; | |
433 | foo.cwrite_kb += pci->cwrite_kb; | |
5c017e4b JA |
434 | |
435 | printf("CPU%d:\n", i); | |
d5396421 | 436 | dump_pci_stats(pci); |
412819ce | 437 | pci_events++; |
5c017e4b JA |
438 | } |
439 | ||
412819ce | 440 | if (pci_events > 1) { |
5c017e4b | 441 | printf("Total:\n"); |
d5396421 | 442 | dump_pci_stats(&foo); |
5c017e4b | 443 | } |
d0ca268b JA |
444 | |
445 | printf("Events: %'Lu\n", events); | |
d0ca268b JA |
446 | } |
447 | ||
3aabcd89 | 448 | static inline int trace_rb_insert(struct trace *t) |
8fc0abbc JA |
449 | { |
450 | struct rb_node **p = &rb_root.rb_node; | |
451 | struct rb_node *parent = NULL; | |
452 | struct trace *__t; | |
453 | ||
454 | while (*p) { | |
455 | parent = *p; | |
456 | __t = rb_entry(parent, struct trace, rb_node); | |
457 | ||
458 | if (t->bit->sequence < __t->bit->sequence) | |
459 | p = &(*p)->rb_left; | |
460 | else if (t->bit->sequence > __t->bit->sequence) | |
461 | p = &(*p)->rb_right; | |
462 | else { | |
87b72777 | 463 | fprintf(stderr, "sequence alias!\n"); |
8fc0abbc JA |
464 | return 1; |
465 | } | |
466 | } | |
467 | ||
468 | rb_link_node(&t->rb_node, parent, p); | |
469 | rb_insert_color(&t->rb_node, &rb_root); | |
470 | return 0; | |
471 | } | |
472 | ||
412819ce | 473 | static int sort_entries(void *traces, unsigned long offset, int nr) |
8fc0abbc | 474 | { |
412819ce | 475 | struct per_cpu_info *pci; |
8fc0abbc JA |
476 | struct blk_io_trace *bit; |
477 | struct trace *t; | |
478 | void *start = traces; | |
479 | int nelems = 0; | |
480 | ||
6fe4709e | 481 | while (traces - start <= offset - sizeof(*bit)) { |
412819ce JA |
482 | if (!nr) |
483 | break; | |
484 | ||
8fc0abbc | 485 | bit = traces; |
6fe4709e | 486 | |
8fc0abbc JA |
487 | t = malloc(sizeof(*t)); |
488 | t->bit = bit; | |
489 | memset(&t->rb_node, 0, sizeof(t->rb_node)); | |
490 | ||
6fe4709e JA |
491 | trace_to_cpu(bit); |
492 | ||
66fa7233 JA |
493 | if (verify_trace(bit)) |
494 | break; | |
495 | ||
a718bd37 | 496 | pci = get_cpu_info(bit->cpu); |
412819ce JA |
497 | pci->nelems++; |
498 | ||
8fc0abbc JA |
499 | if (trace_rb_insert(t)) |
500 | return -1; | |
501 | ||
502 | traces += sizeof(*bit) + bit->pdu_len; | |
503 | nelems++; | |
412819ce | 504 | nr--; |
6fe4709e | 505 | } |
8fc0abbc JA |
506 | |
507 | return nelems; | |
508 | } | |
509 | ||
412819ce JA |
510 | static void free_entries_rb(void) |
511 | { | |
512 | struct rb_node *n; | |
513 | ||
514 | while ((n = rb_first(&rb_root)) != NULL) { | |
515 | struct trace *t = rb_entry(n, struct trace, rb_node); | |
516 | ||
517 | rb_erase(&t->rb_node, &rb_root); | |
518 | free(t); | |
519 | } | |
520 | } | |
521 | ||
d5396421 | 522 | static void show_entries_rb(void) |
8fc0abbc | 523 | { |
8fc0abbc | 524 | struct blk_io_trace *bit; |
3aabcd89 | 525 | struct rb_node *n; |
8fc0abbc JA |
526 | struct trace *t; |
527 | int cpu; | |
528 | ||
3aabcd89 JA |
529 | n = rb_first(&rb_root); |
530 | if (!n) | |
531 | return; | |
8fc0abbc | 532 | |
3aabcd89 | 533 | do { |
8fc0abbc JA |
534 | t = rb_entry(n, struct trace, rb_node); |
535 | bit = t->bit; | |
536 | ||
d5396421 | 537 | cpu = bit->cpu; |
87b72777 | 538 | if (cpu > max_cpus) { |
8fc0abbc | 539 | fprintf(stderr, "CPU number too large (%d)\n", cpu); |
87b72777 | 540 | break; |
8fc0abbc JA |
541 | } |
542 | ||
cfab07eb AB |
543 | if (genesis_time == 0) |
544 | genesis_time = bit->time; | |
545 | bit->time -= genesis_time; | |
8fc0abbc | 546 | |
cfab07eb | 547 | check_time(bit); |
8fc0abbc | 548 | |
d5396421 | 549 | if (dump_trace(bit, &per_cpu_info[cpu])) |
87b72777 JA |
550 | break; |
551 | ||
8fc0abbc JA |
552 | } while ((n = rb_next(n)) != NULL); |
553 | } | |
554 | ||
1f79c4a0 JA |
555 | static int read_data(int fd, void *buffer, int bytes, int block) |
556 | { | |
557 | int ret, bytes_left, fl; | |
558 | void *p; | |
559 | ||
560 | fl = fcntl(fd, F_GETFL); | |
561 | ||
562 | if (!block) | |
563 | fcntl(fd, F_SETFL, fl | O_NONBLOCK); | |
564 | else | |
565 | fcntl(fd, F_SETFL, fl & ~O_NONBLOCK); | |
566 | ||
567 | bytes_left = bytes; | |
568 | p = buffer; | |
569 | while (bytes_left > 0) { | |
570 | ret = read(fd, p, bytes_left); | |
571 | if (!ret) | |
572 | return 1; | |
573 | else if (ret < 0) { | |
574 | if (errno != EAGAIN) | |
575 | perror("read"); | |
576 | return -1; | |
577 | } else { | |
578 | p += ret; | |
579 | bytes_left -= ret; | |
580 | } | |
581 | } | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
d5396421 | 586 | static int do_file(void) |
d0ca268b | 587 | { |
a718bd37 | 588 | int i, nfiles; |
d0ca268b | 589 | |
a718bd37 NS |
590 | for (i = 0, nfiles = 0;; i++, nfiles++) { |
591 | struct per_cpu_info *pci; | |
87b72777 JA |
592 | struct stat st; |
593 | void *tb; | |
594 | ||
a718bd37 | 595 | pci = get_cpu_info(i); |
d5396421 | 596 | pci->ofp = NULL; |
d0ca268b | 597 | |
d5396421 JA |
598 | snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i); |
599 | if (stat(pci->fname, &st) < 0) | |
d0ca268b | 600 | break; |
afd2d7ad | 601 | if (!st.st_size) |
602 | continue; | |
d0ca268b | 603 | |
d5396421 | 604 | printf("Processing %s\n", pci->fname); |
8fc0abbc | 605 | |
87b72777 | 606 | tb = malloc(st.st_size); |
8fc0abbc | 607 | |
d5396421 JA |
608 | pci->fd = open(pci->fname, O_RDONLY); |
609 | if (pci->fd < 0) { | |
610 | perror(pci->fname); | |
3aabcd89 | 611 | break; |
d0ca268b | 612 | } |
afd2d7ad | 613 | |
1f79c4a0 | 614 | if (read_data(pci->fd, tb, st.st_size, 1)) |
3aabcd89 | 615 | break; |
d0ca268b | 616 | |
a718bd37 | 617 | if (sort_entries(tb, st.st_size, ~0U) == -1) |
3aabcd89 | 618 | break; |
d0ca268b | 619 | |
d5396421 | 620 | close(pci->fd); |
d5396421 JA |
621 | printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems); |
622 | ||
623 | } | |
624 | ||
625 | if (!nfiles) { | |
626 | fprintf(stderr, "No files found\n"); | |
627 | return 1; | |
628 | } | |
629 | ||
630 | show_entries_rb(); | |
d5396421 JA |
631 | return 0; |
632 | } | |
633 | ||
412819ce | 634 | static void resize_buffer(void **buffer, long *old_size) |
d5396421 | 635 | { |
412819ce | 636 | long cur_size = *old_size; |
d5396421 JA |
637 | void *ptr; |
638 | ||
412819ce JA |
639 | *old_size *= 2; |
640 | ptr = malloc(*old_size); | |
641 | memcpy(ptr, *buffer, cur_size); | |
642 | free(*buffer); | |
643 | *buffer = ptr; | |
644 | } | |
d5396421 | 645 | |
412819ce JA |
646 | static int read_sort_events(int fd, void **buffer) |
647 | { | |
648 | long offset, max_offset; | |
649 | int events; | |
d5396421 | 650 | |
412819ce JA |
651 | max_offset = 128 * sizeof(struct blk_io_trace); |
652 | *buffer = malloc(max_offset); | |
653 | events = 0; | |
654 | offset = 0; | |
d5396421 | 655 | |
412819ce JA |
656 | do { |
657 | struct blk_io_trace *t; | |
658 | int pdu_len; | |
d5396421 | 659 | |
412819ce JA |
660 | if (max_offset - offset < sizeof(*t)) |
661 | resize_buffer(buffer, &max_offset); | |
d5396421 | 662 | |
412819ce JA |
663 | if (read_data(fd, *buffer + offset, sizeof(*t), !events)) { |
664 | if (events) | |
d5396421 | 665 | break; |
412819ce JA |
666 | |
667 | usleep(1000); | |
668 | continue; | |
d5396421 JA |
669 | } |
670 | ||
412819ce JA |
671 | t = *buffer + offset; |
672 | offset += sizeof(*t); | |
d5396421 | 673 | |
412819ce | 674 | pdu_len = be16_to_cpu(t->pdu_len); |
d5396421 | 675 | |
412819ce JA |
676 | if (max_offset - offset < pdu_len) |
677 | resize_buffer(buffer, &max_offset); | |
d5396421 | 678 | |
412819ce JA |
679 | if (read_data(fd, *buffer + offset, pdu_len, 1)) |
680 | break; | |
d5396421 | 681 | |
412819ce JA |
682 | offset += pdu_len; |
683 | events++; | |
79f19470 | 684 | } while (!is_done() && events < rb_batch); |
d5396421 | 685 | |
412819ce JA |
686 | return events; |
687 | } | |
d5396421 | 688 | |
412819ce JA |
689 | static int do_stdin(void) |
690 | { | |
691 | int fd; | |
692 | void *ptr; | |
d5396421 | 693 | |
1f79c4a0 | 694 | fd = dup(STDIN_FILENO); |
412819ce JA |
695 | do { |
696 | int events; | |
d5396421 | 697 | |
412819ce JA |
698 | events = read_sort_events(fd, &ptr); |
699 | if (!events) | |
700 | break; | |
701 | ||
702 | sort_entries(ptr, ~0UL, events); | |
703 | show_entries_rb(); | |
704 | free_entries_rb(); | |
d5396421 JA |
705 | } while (1); |
706 | ||
707 | close(fd); | |
708 | free(ptr); | |
d5396421 JA |
709 | return 0; |
710 | } | |
d0ca268b | 711 | |
1f79c4a0 | 712 | static void flush_output(void) |
412819ce JA |
713 | { |
714 | int i; | |
715 | ||
a718bd37 | 716 | for (i = 0; i < max_cpus; i++) { |
412819ce JA |
717 | struct per_cpu_info *pci = &per_cpu_info[i]; |
718 | ||
719 | if (pci->ofp) { | |
720 | fflush(pci->ofp); | |
721 | fclose(pci->ofp); | |
722 | pci->ofp = NULL; | |
723 | } | |
724 | } | |
725 | } | |
726 | ||
1f79c4a0 | 727 | static void handle_sigint(int sig) |
412819ce JA |
728 | { |
729 | done = 1; | |
730 | flush_output(); | |
731 | } | |
732 | ||
1f79c4a0 JA |
733 | static void usage(char *prog) |
734 | { | |
735 | fprintf(stderr, "Usage: %s -i <name> [-o <output>]\n", prog); | |
736 | } | |
737 | ||
d5396421 JA |
738 | int main(int argc, char *argv[]) |
739 | { | |
412819ce | 740 | int c, ret; |
d5396421 JA |
741 | |
742 | while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) { | |
743 | switch (c) { | |
744 | case 'i': | |
745 | dev = strdup(optarg); | |
746 | break; | |
747 | case 'o': | |
748 | output_name = strdup(optarg); | |
749 | break; | |
79f19470 JA |
750 | case 'b': |
751 | rb_batch = atoi(optarg); | |
752 | if (rb_batch <= 0) | |
753 | rb_batch = RB_BATCH_DEFAULT; | |
754 | break; | |
d5396421 | 755 | default: |
1f79c4a0 | 756 | usage(argv[0]); |
d5396421 JA |
757 | return 1; |
758 | } | |
d0ca268b JA |
759 | } |
760 | ||
d5396421 | 761 | if (!dev) { |
1f79c4a0 | 762 | usage(argv[0]); |
d5396421 JA |
763 | return 1; |
764 | } | |
765 | ||
412819ce JA |
766 | memset(&rb_root, 0, sizeof(rb_root)); |
767 | ||
768 | signal(SIGINT, handle_sigint); | |
769 | signal(SIGHUP, handle_sigint); | |
770 | signal(SIGTERM, handle_sigint); | |
d5396421 | 771 | |
d69db225 JA |
772 | setlocale(LC_NUMERIC, "en_US"); |
773 | ||
d5396421 JA |
774 | if (!strcmp(dev, "-")) |
775 | ret = do_stdin(); | |
776 | else | |
777 | ret = do_file(); | |
778 | ||
412819ce JA |
779 | show_stats(); |
780 | flush_output(); | |
d5396421 | 781 | return ret; |
d0ca268b | 782 | } |