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