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Merge git://git.infradead.org/battery-2.6
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / tools / perf / builtin-record.c
blob4e75583ddd6d9605b96256264c4e5ca900670d3e
1 /*
2 * builtin-record.c
3 *
4 * Builtin record command: Record the profile of a workload
5 * (or a CPU, or a PID) into the perf.data output file - for
6 * later analysis via perf report.
7 */
8 #define _FILE_OFFSET_BITS 64
9
10 #include "builtin.h"
11
12 #include "perf.h"
13
14 #include "util/build-id.h"
15 #include "util/util.h"
16 #include "util/parse-options.h"
17 #include "util/parse-events.h"
18
19 #include "util/header.h"
20 #include "util/event.h"
21 #include "util/debug.h"
22 #include "util/session.h"
23 #include "util/symbol.h"
24 #include "util/cpumap.h"
25
26 #include <unistd.h>
27 #include <sched.h>
28 #include <sys/mman.h>
29
30 enum write_mode_t {
31 WRITE_FORCE,
32 WRITE_APPEND
33 };
34
35 static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
36
37 static u64 user_interval = ULLONG_MAX;
38 static u64 default_interval = 0;
39
40 static int nr_cpus = 0;
41 static unsigned int page_size;
42 static unsigned int mmap_pages = 128;
43 static unsigned int user_freq = UINT_MAX;
44 static int freq = 1000;
45 static int output;
46 static int pipe_output = 0;
47 static const char *output_name = "perf.data";
48 static int group = 0;
49 static int realtime_prio = 0;
50 static bool raw_samples = false;
51 static bool system_wide = false;
52 static pid_t target_pid = -1;
53 static pid_t target_tid = -1;
54 static pid_t *all_tids = NULL;
55 static int thread_num = 0;
56 static pid_t child_pid = -1;
57 static bool no_inherit = false;
58 static enum write_mode_t write_mode = WRITE_FORCE;
59 static bool call_graph = false;
60 static bool inherit_stat = false;
61 static bool no_samples = false;
62 static bool sample_address = false;
63 static bool no_buildid = false;
64
65 static long samples = 0;
66 static u64 bytes_written = 0;
67
68 static struct pollfd *event_array;
69
70 static int nr_poll = 0;
71 static int nr_cpu = 0;
72
73 static int file_new = 1;
74 static off_t post_processing_offset;
75
76 static struct perf_session *session;
77 static const char *cpu_list;
78
79 struct mmap_data {
80 int counter;
81 void *base;
82 unsigned int mask;
83 unsigned int prev;
84 };
85
86 static struct mmap_data mmap_array[MAX_NR_CPUS];
87
88 static unsigned long mmap_read_head(struct mmap_data *md)
89 {
90 struct perf_event_mmap_page *pc = md->base;
91 long head;
92
93 head = pc->data_head;
94 rmb();
95
96 return head;
97 }
98
99 static void mmap_write_tail(struct mmap_data *md, unsigned long tail)
100 {
101 struct perf_event_mmap_page *pc = md->base;
102
103 /*
104 * ensure all reads are done before we write the tail out.
105 */
106 /* mb(); */
107 pc->data_tail = tail;
108 }
109
110 static void advance_output(size_t size)
111 {
112 bytes_written += size;
113 }
114
115 static void write_output(void *buf, size_t size)
116 {
117 while (size) {
118 int ret = write(output, buf, size);
119
120 if (ret < 0)
121 die("failed to write");
122
123 size -= ret;
124 buf += ret;
125
126 bytes_written += ret;
127 }
128 }
129
130 static int process_synthesized_event(event_t *event,
131 struct perf_session *self __used)
132 {
133 write_output(event, event->header.size);
134 return 0;
135 }
136
137 static void mmap_read(struct mmap_data *md)
138 {
139 unsigned int head = mmap_read_head(md);
140 unsigned int old = md->prev;
141 unsigned char *data = md->base + page_size;
142 unsigned long size;
143 void *buf;
144 int diff;
145
146 /*
147 * If we're further behind than half the buffer, there's a chance
148 * the writer will bite our tail and mess up the samples under us.
149 *
150 * If we somehow ended up ahead of the head, we got messed up.
151 *
152 * In either case, truncate and restart at head.
153 */
154 diff = head - old;
155 if (diff < 0) {
156 fprintf(stderr, "WARNING: failed to keep up with mmap data\n");
157 /*
158 * head points to a known good entry, start there.
159 */
160 old = head;
161 }
162
163 if (old != head)
164 samples++;
165
166 size = head - old;
167
168 if ((old & md->mask) + size != (head & md->mask)) {
169 buf = &data[old & md->mask];
170 size = md->mask + 1 - (old & md->mask);
171 old += size;
172
173 write_output(buf, size);
174 }
175
176 buf = &data[old & md->mask];
177 size = head - old;
178 old += size;
179
180 write_output(buf, size);
181
182 md->prev = old;
183 mmap_write_tail(md, old);
184 }
185
186 static volatile int done = 0;
187 static volatile int signr = -1;
188
189 static void sig_handler(int sig)
190 {
191 done = 1;
192 signr = sig;
193 }
194
195 static void sig_atexit(void)
196 {
197 if (child_pid > 0)
198 kill(child_pid, SIGTERM);
199
200 if (signr == -1)
201 return;
202
203 signal(signr, SIG_DFL);
204 kill(getpid(), signr);
205 }
206
207 static int group_fd;
208
209 static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
210 {
211 struct perf_header_attr *h_attr;
212
213 if (nr < session->header.attrs) {
214 h_attr = session->header.attr[nr];
215 } else {
216 h_attr = perf_header_attr__new(a);
217 if (h_attr != NULL)
218 if (perf_header__add_attr(&session->header, h_attr) < 0) {
219 perf_header_attr__delete(h_attr);
220 h_attr = NULL;
221 }
222 }
223
224 return h_attr;
225 }
226
227 static void create_counter(int counter, int cpu)
228 {
229 char *filter = filters[counter];
230 struct perf_event_attr *attr = attrs + counter;
231 struct perf_header_attr *h_attr;
232 int track = !counter; /* only the first counter needs these */
233 int thread_index;
234 int ret;
235 struct {
236 u64 count;
237 u64 time_enabled;
238 u64 time_running;
239 u64 id;
240 } read_data;
241
242 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
243 PERF_FORMAT_TOTAL_TIME_RUNNING |
244 PERF_FORMAT_ID;
245
246 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
247
248 if (nr_counters > 1)
249 attr->sample_type |= PERF_SAMPLE_ID;
250
251 /*
252 * We default some events to a 1 default interval. But keep
253 * it a weak assumption overridable by the user.
254 */
255 if (!attr->sample_period || (user_freq != UINT_MAX &&
256 user_interval != ULLONG_MAX)) {
257 if (freq) {
258 attr->sample_type |= PERF_SAMPLE_PERIOD;
259 attr->freq = 1;
260 attr->sample_freq = freq;
261 } else {
262 attr->sample_period = default_interval;
263 }
264 }
265
266 if (no_samples)
267 attr->sample_freq = 0;
268
269 if (inherit_stat)
270 attr->inherit_stat = 1;
271
272 if (sample_address) {
273 attr->sample_type |= PERF_SAMPLE_ADDR;
274 attr->mmap_data = track;
275 }
276
277 if (call_graph)
278 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
279
280 if (system_wide)
281 attr->sample_type |= PERF_SAMPLE_CPU;
282
283 if (raw_samples) {
284 attr->sample_type |= PERF_SAMPLE_TIME;
285 attr->sample_type |= PERF_SAMPLE_RAW;
286 attr->sample_type |= PERF_SAMPLE_CPU;
287 }
288
289 attr->mmap = track;
290 attr->comm = track;
291 attr->inherit = !no_inherit;
292 if (target_pid == -1 && target_tid == -1 && !system_wide) {
293 attr->disabled = 1;
294 attr->enable_on_exec = 1;
295 }
296
297 for (thread_index = 0; thread_index < thread_num; thread_index++) {
298 try_again:
299 fd[nr_cpu][counter][thread_index] = sys_perf_event_open(attr,
300 all_tids[thread_index], cpu, group_fd, 0);
301
302 if (fd[nr_cpu][counter][thread_index] < 0) {
303 int err = errno;
304
305 if (err == EPERM || err == EACCES)
306 die("Permission error - are you root?\n"
307 "\t Consider tweaking"
308 " /proc/sys/kernel/perf_event_paranoid.\n");
309 else if (err == ENODEV && cpu_list) {
310 die("No such device - did you specify"
311 " an out-of-range profile CPU?\n");
312 }
313
314 /*
315 * If it's cycles then fall back to hrtimer
316 * based cpu-clock-tick sw counter, which
317 * is always available even if no PMU support:
318 */
319 if (attr->type == PERF_TYPE_HARDWARE
320 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
321
322 if (verbose)
323 warning(" ... trying to fall back to cpu-clock-ticks\n");
324 attr->type = PERF_TYPE_SOFTWARE;
325 attr->config = PERF_COUNT_SW_CPU_CLOCK;
326 goto try_again;
327 }
328 printf("\n");
329 error("perfcounter syscall returned with %d (%s)\n",
330 fd[nr_cpu][counter][thread_index], strerror(err));
331
332 #if defined(__i386__) || defined(__x86_64__)
333 if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
334 die("No hardware sampling interrupt available."
335 " No APIC? If so then you can boot the kernel"
336 " with the \"lapic\" boot parameter to"
337 " force-enable it.\n");
338 #endif
339
340 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
341 exit(-1);
342 }
343
344 h_attr = get_header_attr(attr, counter);
345 if (h_attr == NULL)
346 die("nomem\n");
347
348 if (!file_new) {
349 if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
350 fprintf(stderr, "incompatible append\n");
351 exit(-1);
352 }
353 }
354
355 if (read(fd[nr_cpu][counter][thread_index], &read_data, sizeof(read_data)) == -1) {
356 perror("Unable to read perf file descriptor");
357 exit(-1);
358 }
359
360 if (perf_header_attr__add_id(h_attr, read_data.id) < 0) {
361 pr_warning("Not enough memory to add id\n");
362 exit(-1);
363 }
364
365 assert(fd[nr_cpu][counter][thread_index] >= 0);
366 fcntl(fd[nr_cpu][counter][thread_index], F_SETFL, O_NONBLOCK);
367
368 /*
369 * First counter acts as the group leader:
370 */
371 if (group && group_fd == -1)
372 group_fd = fd[nr_cpu][counter][thread_index];
373
374 if (counter || thread_index) {
375 ret = ioctl(fd[nr_cpu][counter][thread_index],
376 PERF_EVENT_IOC_SET_OUTPUT,
377 fd[nr_cpu][0][0]);
378 if (ret) {
379 error("failed to set output: %d (%s)\n", errno,
380 strerror(errno));
381 exit(-1);
382 }
383 } else {
384 mmap_array[nr_cpu].counter = counter;
385 mmap_array[nr_cpu].prev = 0;
386 mmap_array[nr_cpu].mask = mmap_pages*page_size - 1;
387 mmap_array[nr_cpu].base = mmap(NULL, (mmap_pages+1)*page_size,
388 PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter][thread_index], 0);
389 if (mmap_array[nr_cpu].base == MAP_FAILED) {
390 error("failed to mmap with %d (%s)\n", errno, strerror(errno));
391 exit(-1);
392 }
393
394 event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index];
395 event_array[nr_poll].events = POLLIN;
396 nr_poll++;
397 }
398
399 if (filter != NULL) {
400 ret = ioctl(fd[nr_cpu][counter][thread_index],
401 PERF_EVENT_IOC_SET_FILTER, filter);
402 if (ret) {
403 error("failed to set filter with %d (%s)\n", errno,
404 strerror(errno));
405 exit(-1);
406 }
407 }
408 }
409 }
410
411 static void open_counters(int cpu)
412 {
413 int counter;
414
415 group_fd = -1;
416 for (counter = 0; counter < nr_counters; counter++)
417 create_counter(counter, cpu);
418
419 nr_cpu++;
420 }
421
422 static int process_buildids(void)
423 {
424 u64 size = lseek(output, 0, SEEK_CUR);
425
426 if (size == 0)
427 return 0;
428
429 session->fd = output;
430 return __perf_session__process_events(session, post_processing_offset,
431 size - post_processing_offset,
432 size, &build_id__mark_dso_hit_ops);
433 }
434
435 static void atexit_header(void)
436 {
437 if (!pipe_output) {
438 session->header.data_size += bytes_written;
439
440 process_buildids();
441 perf_header__write(&session->header, output, true);
442 perf_session__delete(session);
443 symbol__exit();
444 }
445 }
446
447 static void event__synthesize_guest_os(struct machine *machine, void *data)
448 {
449 int err;
450 struct perf_session *psession = data;
451
452 if (machine__is_host(machine))
453 return;
454
455 /*
456 *As for guest kernel when processing subcommand record&report,
457 *we arrange module mmap prior to guest kernel mmap and trigger
458 *a preload dso because default guest module symbols are loaded
459 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
460 *method is used to avoid symbol missing when the first addr is
461 *in module instead of in guest kernel.
462 */
463 err = event__synthesize_modules(process_synthesized_event,
464 psession, machine);
465 if (err < 0)
466 pr_err("Couldn't record guest kernel [%d]'s reference"
467 " relocation symbol.\n", machine->pid);
468
469 /*
470 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
471 * have no _text sometimes.
472 */
473 err = event__synthesize_kernel_mmap(process_synthesized_event,
474 psession, machine, "_text");
475 if (err < 0)
476 err = event__synthesize_kernel_mmap(process_synthesized_event,
477 psession, machine, "_stext");
478 if (err < 0)
479 pr_err("Couldn't record guest kernel [%d]'s reference"
480 " relocation symbol.\n", machine->pid);
481 }
482
483 static struct perf_event_header finished_round_event = {
484 .size = sizeof(struct perf_event_header),
485 .type = PERF_RECORD_FINISHED_ROUND,
486 };
487
488 static void mmap_read_all(void)
489 {
490 int i;
491
492 for (i = 0; i < nr_cpu; i++) {
493 if (mmap_array[i].base)
494 mmap_read(&mmap_array[i]);
495 }
496
497 if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
498 write_output(&finished_round_event, sizeof(finished_round_event));
499 }
500
501 static int __cmd_record(int argc, const char **argv)
502 {
503 int i, counter;
504 struct stat st;
505 int flags;
506 int err;
507 unsigned long waking = 0;
508 int child_ready_pipe[2], go_pipe[2];
509 const bool forks = argc > 0;
510 char buf;
511 struct machine *machine;
512
513 page_size = sysconf(_SC_PAGE_SIZE);
514
515 atexit(sig_atexit);
516 signal(SIGCHLD, sig_handler);
517 signal(SIGINT, sig_handler);
518
519 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
520 perror("failed to create pipes");
521 exit(-1);
522 }
523
524 if (!strcmp(output_name, "-"))
525 pipe_output = 1;
526 else if (!stat(output_name, &st) && st.st_size) {
527 if (write_mode == WRITE_FORCE) {
528 char oldname[PATH_MAX];
529 snprintf(oldname, sizeof(oldname), "%s.old",
530 output_name);
531 unlink(oldname);
532 rename(output_name, oldname);
533 }
534 } else if (write_mode == WRITE_APPEND) {
535 write_mode = WRITE_FORCE;
536 }
537
538 flags = O_CREAT|O_RDWR;
539 if (write_mode == WRITE_APPEND)
540 file_new = 0;
541 else
542 flags |= O_TRUNC;
543
544 if (pipe_output)
545 output = STDOUT_FILENO;
546 else
547 output = open(output_name, flags, S_IRUSR | S_IWUSR);
548 if (output < 0) {
549 perror("failed to create output file");
550 exit(-1);
551 }
552
553 session = perf_session__new(output_name, O_WRONLY,
554 write_mode == WRITE_FORCE, false);
555 if (session == NULL) {
556 pr_err("Not enough memory for reading perf file header\n");
557 return -1;
558 }
559
560 if (!file_new) {
561 err = perf_header__read(session, output);
562 if (err < 0)
563 goto out_delete_session;
564 }
565
566 if (have_tracepoints(attrs, nr_counters))
567 perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
568
569 /*
570 * perf_session__delete(session) will be called at atexit_header()
571 */
572 atexit(atexit_header);
573
574 if (forks) {
575 child_pid = fork();
576 if (child_pid < 0) {
577 perror("failed to fork");
578 exit(-1);
579 }
580
581 if (!child_pid) {
582 if (pipe_output)
583 dup2(2, 1);
584 close(child_ready_pipe[0]);
585 close(go_pipe[1]);
586 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
587
588 /*
589 * Do a dummy execvp to get the PLT entry resolved,
590 * so we avoid the resolver overhead on the real
591 * execvp call.
592 */
593 execvp("", (char **)argv);
594
595 /*
596 * Tell the parent we're ready to go
597 */
598 close(child_ready_pipe[1]);
599
600 /*
601 * Wait until the parent tells us to go.
602 */
603 if (read(go_pipe[0], &buf, 1) == -1)
604 perror("unable to read pipe");
605
606 execvp(argv[0], (char **)argv);
607
608 perror(argv[0]);
609 exit(-1);
610 }
611
612 if (!system_wide && target_tid == -1 && target_pid == -1)
613 all_tids[0] = child_pid;
614
615 close(child_ready_pipe[1]);
616 close(go_pipe[0]);
617 /*
618 * wait for child to settle
619 */
620 if (read(child_ready_pipe[0], &buf, 1) == -1) {
621 perror("unable to read pipe");
622 exit(-1);
623 }
624 close(child_ready_pipe[0]);
625 }
626
627 nr_cpus = read_cpu_map(cpu_list);
628 if (nr_cpus < 1) {
629 perror("failed to collect number of CPUs");
630 return -1;
631 }
632
633 if (!system_wide && no_inherit && !cpu_list) {
634 open_counters(-1);
635 } else {
636 for (i = 0; i < nr_cpus; i++)
637 open_counters(cpumap[i]);
638 }
639
640 if (pipe_output) {
641 err = perf_header__write_pipe(output);
642 if (err < 0)
643 return err;
644 } else if (file_new) {
645 err = perf_header__write(&session->header, output, false);
646 if (err < 0)
647 return err;
648 }
649
650 post_processing_offset = lseek(output, 0, SEEK_CUR);
651
652 if (pipe_output) {
653 err = event__synthesize_attrs(&session->header,
654 process_synthesized_event,
655 session);
656 if (err < 0) {
657 pr_err("Couldn't synthesize attrs.\n");
658 return err;
659 }
660
661 err = event__synthesize_event_types(process_synthesized_event,
662 session);
663 if (err < 0) {
664 pr_err("Couldn't synthesize event_types.\n");
665 return err;
666 }
667
668 if (have_tracepoints(attrs, nr_counters)) {
669 /*
670 * FIXME err <= 0 here actually means that
671 * there were no tracepoints so its not really
672 * an error, just that we don't need to
673 * synthesize anything. We really have to
674 * return this more properly and also
675 * propagate errors that now are calling die()
676 */
677 err = event__synthesize_tracing_data(output, attrs,
678 nr_counters,
679 process_synthesized_event,
680 session);
681 if (err <= 0) {
682 pr_err("Couldn't record tracing data.\n");
683 return err;
684 }
685 advance_output(err);
686 }
687 }
688
689 machine = perf_session__find_host_machine(session);
690 if (!machine) {
691 pr_err("Couldn't find native kernel information.\n");
692 return -1;
693 }
694
695 err = event__synthesize_kernel_mmap(process_synthesized_event,
696 session, machine, "_text");
697 if (err < 0)
698 err = event__synthesize_kernel_mmap(process_synthesized_event,
699 session, machine, "_stext");
700 if (err < 0) {
701 pr_err("Couldn't record kernel reference relocation symbol.\n");
702 return err;
703 }
704
705 err = event__synthesize_modules(process_synthesized_event,
706 session, machine);
707 if (err < 0) {
708 pr_err("Couldn't record kernel reference relocation symbol.\n");
709 return err;
710 }
711 if (perf_guest)
712 perf_session__process_machines(session, event__synthesize_guest_os);
713
714 if (!system_wide)
715 event__synthesize_thread(target_tid, process_synthesized_event,
716 session);
717 else
718 event__synthesize_threads(process_synthesized_event, session);
719
720 if (realtime_prio) {
721 struct sched_param param;
722
723 param.sched_priority = realtime_prio;
724 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
725 pr_err("Could not set realtime priority.\n");
726 exit(-1);
727 }
728 }
729
730 /*
731 * Let the child rip
732 */
733 if (forks)
734 close(go_pipe[1]);
735
736 for (;;) {
737 int hits = samples;
738 int thread;
739
740 mmap_read_all();
741
742 if (hits == samples) {
743 if (done)
744 break;
745 err = poll(event_array, nr_poll, -1);
746 waking++;
747 }
748
749 if (done) {
750 for (i = 0; i < nr_cpu; i++) {
751 for (counter = 0;
752 counter < nr_counters;
753 counter++) {
754 for (thread = 0;
755 thread < thread_num;
756 thread++)
757 ioctl(fd[i][counter][thread],
758 PERF_EVENT_IOC_DISABLE);
759 }
760 }
761 }
762 }
763
764 if (quiet)
765 return 0;
766
767 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
768
769 /*
770 * Approximate RIP event size: 24 bytes.
771 */
772 fprintf(stderr,
773 "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n",
774 (double)bytes_written / 1024.0 / 1024.0,
775 output_name,
776 bytes_written / 24);
777
778 return 0;
779
780 out_delete_session:
781 perf_session__delete(session);
782 return err;
783 }
784
785 static const char * const record_usage[] = {
786 "perf record [<options>] [<command>]",
787 "perf record [<options>] -- <command> [<options>]",
788 NULL
789 };
790
791 static bool force, append_file;
792
793 static const struct option options[] = {
794 OPT_CALLBACK('e', "event", NULL, "event",
795 "event selector. use 'perf list' to list available events",
796 parse_events),
797 OPT_CALLBACK(0, "filter", NULL, "filter",
798 "event filter", parse_filter),
799 OPT_INTEGER('p', "pid", &target_pid,
800 "record events on existing process id"),
801 OPT_INTEGER('t', "tid", &target_tid,
802 "record events on existing thread id"),
803 OPT_INTEGER('r', "realtime", &realtime_prio,
804 "collect data with this RT SCHED_FIFO priority"),
805 OPT_BOOLEAN('R', "raw-samples", &raw_samples,
806 "collect raw sample records from all opened counters"),
807 OPT_BOOLEAN('a', "all-cpus", &system_wide,
808 "system-wide collection from all CPUs"),
809 OPT_BOOLEAN('A', "append", &append_file,
810 "append to the output file to do incremental profiling"),
811 OPT_STRING('C', "cpu", &cpu_list, "cpu",
812 "list of cpus to monitor"),
813 OPT_BOOLEAN('f', "force", &force,
814 "overwrite existing data file (deprecated)"),
815 OPT_U64('c', "count", &user_interval, "event period to sample"),
816 OPT_STRING('o', "output", &output_name, "file",
817 "output file name"),
818 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
819 "child tasks do not inherit counters"),
820 OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
821 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
822 OPT_BOOLEAN('g', "call-graph", &call_graph,
823 "do call-graph (stack chain/backtrace) recording"),
824 OPT_INCR('v', "verbose", &verbose,
825 "be more verbose (show counter open errors, etc)"),
826 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
827 OPT_BOOLEAN('s', "stat", &inherit_stat,
828 "per thread counts"),
829 OPT_BOOLEAN('d', "data", &sample_address,
830 "Sample addresses"),
831 OPT_BOOLEAN('n', "no-samples", &no_samples,
832 "don't sample"),
833 OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid,
834 "do not update the buildid cache"),
835 OPT_END()
836 };
837
838 int cmd_record(int argc, const char **argv, const char *prefix __used)
839 {
840 int i, j, err = -ENOMEM;
841
842 argc = parse_options(argc, argv, options, record_usage,
843 PARSE_OPT_STOP_AT_NON_OPTION);
844 if (!argc && target_pid == -1 && target_tid == -1 &&
845 !system_wide && !cpu_list)
846 usage_with_options(record_usage, options);
847
848 if (force && append_file) {
849 fprintf(stderr, "Can't overwrite and append at the same time."
850 " You need to choose between -f and -A");
851 usage_with_options(record_usage, options);
852 } else if (append_file) {
853 write_mode = WRITE_APPEND;
854 } else {
855 write_mode = WRITE_FORCE;
856 }
857
858 symbol__init();
859 if (no_buildid)
860 disable_buildid_cache();
861
862 if (!nr_counters) {
863 nr_counters = 1;
864 attrs[0].type = PERF_TYPE_HARDWARE;
865 attrs[0].config = PERF_COUNT_HW_CPU_CYCLES;
866 }
867
868 if (target_pid != -1) {
869 target_tid = target_pid;
870 thread_num = find_all_tid(target_pid, &all_tids);
871 if (thread_num <= 0) {
872 fprintf(stderr, "Can't find all threads of pid %d\n",
873 target_pid);
874 usage_with_options(record_usage, options);
875 }
876 } else {
877 all_tids=malloc(sizeof(pid_t));
878 if (!all_tids)
879 goto out_symbol_exit;
880
881 all_tids[0] = target_tid;
882 thread_num = 1;
883 }
884
885 for (i = 0; i < MAX_NR_CPUS; i++) {
886 for (j = 0; j < MAX_COUNTERS; j++) {
887 fd[i][j] = malloc(sizeof(int)*thread_num);
888 if (!fd[i][j])
889 goto out_free_fd;
890 }
891 }
892 event_array = malloc(
893 sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
894 if (!event_array)
895 goto out_free_fd;
896
897 if (user_interval != ULLONG_MAX)
898 default_interval = user_interval;
899 if (user_freq != UINT_MAX)
900 freq = user_freq;
901
902 /*
903 * User specified count overrides default frequency.
904 */
905 if (default_interval)
906 freq = 0;
907 else if (freq) {
908 default_interval = freq;
909 } else {
910 fprintf(stderr, "frequency and count are zero, aborting\n");
911 err = -EINVAL;
912 goto out_free_event_array;
913 }
914
915 err = __cmd_record(argc, argv);
916
917 out_free_event_array:
918 free(event_array);
919 out_free_fd:
920 for (i = 0; i < MAX_NR_CPUS; i++) {
921 for (j = 0; j < MAX_COUNTERS; j++)
922 free(fd[i][j]);
923 }
924 free(all_tids);
925 all_tids = NULL;
926 out_symbol_exit:
927 symbol__exit();
928 return err;
929 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree