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