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Ingo Molnarabaff322009-06-02 22:59:57 +02001/*
Ingo Molnarbf9e1872009-06-02 23:37:05 +02002 * 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.
Ingo Molnarabaff322009-06-02 22:59:57 +02007 */
Xiao Guangrongb8f46c52010-02-03 11:53:14 +08008#define _FILE_OFFSET_BITS 64
9
Ingo Molnar16f762a2009-05-27 09:10:38 +020010#include "builtin.h"
Ingo Molnarbf9e1872009-06-02 23:37:05 +020011
12#include "perf.h"
13
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -020014#include "util/build-id.h"
Thomas Gleixner6eda5832009-05-01 18:29:57 +020015#include "util/util.h"
Ingo Molnar0e9b20b2009-05-26 09:17:18 +020016#include "util/parse-options.h"
Ingo Molnar8ad8db32009-05-26 11:10:09 +020017#include "util/parse-events.h"
Thomas Gleixner6eda5832009-05-01 18:29:57 +020018
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +020019#include "util/header.h"
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020020#include "util/event.h"
Frederic Weisbecker8f288272009-08-16 22:05:48 +020021#include "util/debug.h"
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -020022#include "util/session.h"
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -020023#include "util/symbol.h"
Paul Mackerrasa12b51c2010-03-10 20:36:09 +110024#include "util/cpumap.h"
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +020025
Peter Zijlstra97124d52009-06-02 15:52:24 +020026#include <unistd.h>
Peter Zijlstrade9ac072009-04-08 15:01:31 +020027#include <sched.h>
Arnaldo Carvalho de Meloa41794c2010-05-18 18:29:23 -030028#include <sys/mman.h>
Peter Zijlstrade9ac072009-04-08 15:01:31 +020029
Frederic Weisbecker7865e812010-04-14 19:42:07 +020030enum write_mode_t {
31 WRITE_FORCE,
32 WRITE_APPEND
33};
34
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030035static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
Ingo Molnara21ca2c2009-06-06 09:58:57 +020036
Stephane Eranian3de29ca2010-05-17 12:20:43 -030037static u64 user_interval = ULLONG_MAX;
38static u64 default_interval = 0;
Ingo Molnara21ca2c2009-06-06 09:58:57 +020039
Ingo Molnar42e59d72009-10-06 15:14:21 +020040static int nr_cpus = 0;
Peter Zijlstrade9ac072009-04-08 15:01:31 +020041static unsigned int page_size;
Ingo Molnar42e59d72009-10-06 15:14:21 +020042static unsigned int mmap_pages = 128;
Frederic Weisbeckerf9212812010-04-14 22:09:02 +020043static unsigned int user_freq = UINT_MAX;
Ingo Molnar42e59d72009-10-06 15:14:21 +020044static int freq = 1000;
Peter Zijlstrade9ac072009-04-08 15:01:31 +020045static int output;
Tom Zanussi529870e2010-04-01 23:59:16 -050046static int pipe_output = 0;
Ingo Molnar23ac9cb2009-05-27 09:33:18 +020047static const char *output_name = "perf.data";
Ingo Molnar42e59d72009-10-06 15:14:21 +020048static int group = 0;
Arnaldo Carvalho de Melo19679362010-05-17 15:39:16 -030049static int realtime_prio = 0;
Ian Munsiec0555642010-04-13 18:37:33 +100050static bool raw_samples = false;
51static bool system_wide = false;
Ingo Molnar42e59d72009-10-06 15:14:21 +020052static int profile_cpu = -1;
53static pid_t target_pid = -1;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030054static pid_t target_tid = -1;
55static pid_t *all_tids = NULL;
56static int thread_num = 0;
Ingo Molnar42e59d72009-10-06 15:14:21 +020057static pid_t child_pid = -1;
Stephane Eranian2e6cdf92010-05-12 10:40:01 +020058static bool no_inherit = false;
Frederic Weisbecker7865e812010-04-14 19:42:07 +020059static enum write_mode_t write_mode = WRITE_FORCE;
Ian Munsiec0555642010-04-13 18:37:33 +100060static bool call_graph = false;
61static bool inherit_stat = false;
62static bool no_samples = false;
63static bool sample_address = false;
Peter Zijlstrade9ac072009-04-08 15:01:31 +020064
Ingo Molnar42e59d72009-10-06 15:14:21 +020065static long samples = 0;
Ingo Molnar42e59d72009-10-06 15:14:21 +020066static u64 bytes_written = 0;
Ingo Molnara21ca2c2009-06-06 09:58:57 +020067
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030068static struct pollfd *event_array;
Ingo Molnara21ca2c2009-06-06 09:58:57 +020069
Ingo Molnar42e59d72009-10-06 15:14:21 +020070static int nr_poll = 0;
71static int nr_cpu = 0;
Ingo Molnara21ca2c2009-06-06 09:58:57 +020072
Ingo Molnar42e59d72009-10-06 15:14:21 +020073static int file_new = 1;
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -020074static off_t post_processing_offset;
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +020075
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -020076static struct perf_session *session;
Peter Zijlstraf5970552009-06-18 23:22:55 +020077
Ingo Molnara21ca2c2009-06-06 09:58:57 +020078struct mmap_data {
79 int counter;
80 void *base;
81 unsigned int mask;
82 unsigned int prev;
83};
84
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +020085static struct mmap_data mmap_array[MAX_NR_CPUS];
Ingo Molnara21ca2c2009-06-06 09:58:57 +020086
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +020087static unsigned long mmap_read_head(struct mmap_data *md)
Peter Zijlstrade9ac072009-04-08 15:01:31 +020088{
Ingo Molnarcdd6c482009-09-21 12:02:48 +020089 struct perf_event_mmap_page *pc = md->base;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +020090 long head;
Peter Zijlstrade9ac072009-04-08 15:01:31 +020091
92 head = pc->data_head;
93 rmb();
94
95 return head;
96}
97
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +020098static void mmap_write_tail(struct mmap_data *md, unsigned long tail)
99{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200100 struct perf_event_mmap_page *pc = md->base;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +0200101
102 /*
103 * ensure all reads are done before we write the tail out.
104 */
105 /* mb(); */
106 pc->data_tail = tail;
107}
108
Tom Zanussi92155452010-04-01 23:59:21 -0500109static void advance_output(size_t size)
110{
111 bytes_written += size;
112}
113
Peter Zijlstraf5970552009-06-18 23:22:55 +0200114static void write_output(void *buf, size_t size)
115{
116 while (size) {
117 int ret = write(output, buf, size);
118
119 if (ret < 0)
120 die("failed to write");
121
122 size -= ret;
123 buf += ret;
124
125 bytes_written += ret;
126 }
127}
128
Arnaldo Carvalho de Melod8f66242009-12-13 19:50:24 -0200129static int process_synthesized_event(event_t *event,
130 struct perf_session *self __used)
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -0200131{
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200132 write_output(event, event->header.size);
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -0200133 return 0;
134}
135
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200136static void mmap_read(struct mmap_data *md)
137{
138 unsigned int head = mmap_read_head(md);
139 unsigned int old = md->prev;
140 unsigned char *data = md->base + page_size;
141 unsigned long size;
142 void *buf;
143 int diff;
144
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200145 /*
146 * If we're further behind than half the buffer, there's a chance
Ingo Molnar2debbc82009-06-05 14:29:10 +0200147 * the writer will bite our tail and mess up the samples under us.
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200148 *
149 * If we somehow ended up ahead of the head, we got messed up.
150 *
151 * In either case, truncate and restart at head.
152 */
153 diff = head - old;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +0200154 if (diff < 0) {
Russ Andersonef365ce2010-05-18 17:52:40 -0500155 fprintf(stderr, "WARNING: failed to keep up with mmap data\n");
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200156 /*
157 * head points to a known good entry, start there.
158 */
159 old = head;
160 }
161
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200162 if (old != head)
Ingo Molnar2debbc82009-06-05 14:29:10 +0200163 samples++;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200164
165 size = head - old;
166
167 if ((old & md->mask) + size != (head & md->mask)) {
168 buf = &data[old & md->mask];
169 size = md->mask + 1 - (old & md->mask);
170 old += size;
Ingo Molnar021e9f42009-06-03 19:27:19 +0200171
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200172 write_output(buf, size);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200173 }
174
175 buf = &data[old & md->mask];
176 size = head - old;
177 old += size;
Ingo Molnar021e9f42009-06-03 19:27:19 +0200178
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200179 write_output(buf, size);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200180
181 md->prev = old;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +0200182 mmap_write_tail(md, old);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200183}
184
185static volatile int done = 0;
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200186static volatile int signr = -1;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200187
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200188static void sig_handler(int sig)
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200189{
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200190 done = 1;
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200191 signr = sig;
192}
193
194static void sig_atexit(void)
195{
Chris Wilson933da832009-10-04 01:35:01 +0100196 if (child_pid != -1)
197 kill(child_pid, SIGTERM);
198
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200199 if (signr == -1)
200 return;
201
202 signal(signr, SIG_DFL);
203 kill(getpid(), signr);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200204}
205
Ingo Molnarf250c0302009-06-05 13:18:41 +0200206static int group_fd;
207
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200208static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200209{
210 struct perf_header_attr *h_attr;
211
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200212 if (nr < session->header.attrs) {
213 h_attr = session->header.attr[nr];
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200214 } else {
215 h_attr = perf_header_attr__new(a);
Arnaldo Carvalho de Melodc79c0f2009-11-16 19:30:26 -0200216 if (h_attr != NULL)
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200217 if (perf_header__add_attr(&session->header, h_attr) < 0) {
Arnaldo Carvalho de Melo11deb1f2009-11-17 01:18:09 -0200218 perf_header_attr__delete(h_attr);
219 h_attr = NULL;
220 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200221 }
222
223 return h_attr;
224}
225
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300226static void create_counter(int counter, int cpu)
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200227{
Li Zefanc171b552009-10-15 11:22:07 +0800228 char *filter = filters[counter];
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200229 struct perf_event_attr *attr = attrs + counter;
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200230 struct perf_header_attr *h_attr;
231 int track = !counter; /* only the first counter needs these */
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300232 int thread_index;
Li Zefanc171b552009-10-15 11:22:07 +0800233 int ret;
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200234 struct {
235 u64 count;
236 u64 time_enabled;
237 u64 time_running;
238 u64 id;
239 } read_data;
240
241 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
242 PERF_FORMAT_TOTAL_TIME_RUNNING |
243 PERF_FORMAT_ID;
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200244
Frederic Weisbecker3a9f1312009-08-13 10:27:18 +0200245 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200246
Eric B Munson8907fd62010-03-05 12:51:05 -0300247 if (nr_counters > 1)
248 attr->sample_type |= PERF_SAMPLE_ID;
249
Frederic Weisbeckerf9212812010-04-14 22:09:02 +0200250 /*
251 * We default some events to a 1 default interval. But keep
252 * it a weak assumption overridable by the user.
253 */
254 if (!attr->sample_period || (user_freq != UINT_MAX &&
Stephane Eranian3de29ca2010-05-17 12:20:43 -0300255 user_interval != ULLONG_MAX)) {
Frederic Weisbeckerf9212812010-04-14 22:09:02 +0200256 if (freq) {
257 attr->sample_type |= PERF_SAMPLE_PERIOD;
258 attr->freq = 1;
259 attr->sample_freq = freq;
260 } else {
261 attr->sample_period = default_interval;
262 }
Ingo Molnar1dba15e2009-06-05 18:37:22 +0200263 }
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200264
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200265 if (no_samples)
266 attr->sample_freq = 0;
267
268 if (inherit_stat)
269 attr->inherit_stat = 1;
270
Anton Blanchard4bba8282009-07-16 15:44:29 +0200271 if (sample_address)
272 attr->sample_type |= PERF_SAMPLE_ADDR;
273
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200274 if (call_graph)
275 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
276
Ingo Molnarcd6feee2009-09-02 20:20:38 +0200277 if (raw_samples) {
Ingo Molnar6ddf2592009-09-03 12:00:22 +0200278 attr->sample_type |= PERF_SAMPLE_TIME;
Frederic Weisbeckerdaac07b2009-08-13 10:27:19 +0200279 attr->sample_type |= PERF_SAMPLE_RAW;
Ingo Molnarcd6feee2009-09-02 20:20:38 +0200280 attr->sample_type |= PERF_SAMPLE_CPU;
281 }
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200282
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200283 attr->mmap = track;
284 attr->comm = track;
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200285 attr->inherit = !no_inherit;
286 if (target_pid == -1 && target_tid == -1 && !system_wide) {
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300287 attr->disabled = 1;
Eric B Munsonbedbfde2010-03-15 11:46:57 -0300288 attr->enable_on_exec = 1;
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300289 }
Eric B Munsonbedbfde2010-03-15 11:46:57 -0300290
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300291 for (thread_index = 0; thread_index < thread_num; thread_index++) {
Ingo Molnar3da297a2009-06-07 17:39:02 +0200292try_again:
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300293 fd[nr_cpu][counter][thread_index] = sys_perf_event_open(attr,
294 all_tids[thread_index], cpu, group_fd, 0);
Ingo Molnarf250c0302009-06-05 13:18:41 +0200295
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300296 if (fd[nr_cpu][counter][thread_index] < 0) {
297 int err = errno;
Ingo Molnarf250c0302009-06-05 13:18:41 +0200298
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300299 if (err == EPERM || err == EACCES)
300 die("Permission error - are you root?\n"
301 "\t Consider tweaking"
302 " /proc/sys/kernel/perf_event_paranoid.\n");
303 else if (err == ENODEV && profile_cpu != -1) {
304 die("No such device - did you specify"
305 " an out-of-range profile CPU?\n");
306 }
Ingo Molnar3da297a2009-06-07 17:39:02 +0200307
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300308 /*
309 * If it's cycles then fall back to hrtimer
310 * based cpu-clock-tick sw counter, which
311 * is always available even if no PMU support:
312 */
313 if (attr->type == PERF_TYPE_HARDWARE
314 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
Ingo Molnar3da297a2009-06-07 17:39:02 +0200315
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300316 if (verbose)
317 warning(" ... trying to fall back to cpu-clock-ticks\n");
318 attr->type = PERF_TYPE_SOFTWARE;
319 attr->config = PERF_COUNT_SW_CPU_CLOCK;
320 goto try_again;
321 }
322 printf("\n");
323 error("perfcounter syscall returned with %d (%s)\n",
324 fd[nr_cpu][counter][thread_index], strerror(err));
Simon Kaempfleinbfd45112009-11-16 15:25:53 +1000325
326#if defined(__i386__) || defined(__x86_64__)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300327 if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
328 die("No hardware sampling interrupt available."
329 " No APIC? If so then you can boot the kernel"
330 " with the \"lapic\" boot parameter to"
331 " force-enable it.\n");
Simon Kaempfleinbfd45112009-11-16 15:25:53 +1000332#endif
333
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300334 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200335 exit(-1);
336 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200337
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300338 h_attr = get_header_attr(attr, counter);
339 if (h_attr == NULL)
340 die("nomem\n");
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200341
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300342 if (!file_new) {
343 if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
344 fprintf(stderr, "incompatible append\n");
345 exit(-1);
346 }
347 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200348
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300349 if (read(fd[nr_cpu][counter][thread_index], &read_data, sizeof(read_data)) == -1) {
350 perror("Unable to read perf file descriptor\n");
Ingo Molnarea57c4f2009-09-13 18:15:54 +0200351 exit(-1);
352 }
Peter Zijlstra4502d772009-06-10 15:03:06 +0200353
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300354 if (perf_header_attr__add_id(h_attr, read_data.id) < 0) {
355 pr_warning("Not enough memory to add id\n");
Li Zefanc171b552009-10-15 11:22:07 +0800356 exit(-1);
357 }
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300358
359 assert(fd[nr_cpu][counter][thread_index] >= 0);
360 fcntl(fd[nr_cpu][counter][thread_index], F_SETFL, O_NONBLOCK);
361
362 /*
363 * First counter acts as the group leader:
364 */
365 if (group && group_fd == -1)
366 group_fd = fd[nr_cpu][counter][thread_index];
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300367
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200368 if (counter || thread_index) {
369 ret = ioctl(fd[nr_cpu][counter][thread_index],
370 PERF_EVENT_IOC_SET_OUTPUT,
371 fd[nr_cpu][0][0]);
372 if (ret) {
373 error("failed to set output: %d (%s)\n", errno,
374 strerror(errno));
375 exit(-1);
376 }
377 } else {
378 mmap_array[nr_cpu].counter = counter;
379 mmap_array[nr_cpu].prev = 0;
380 mmap_array[nr_cpu].mask = mmap_pages*page_size - 1;
381 mmap_array[nr_cpu].base = mmap(NULL, (mmap_pages+1)*page_size,
382 PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter][thread_index], 0);
383 if (mmap_array[nr_cpu].base == MAP_FAILED) {
384 error("failed to mmap with %d (%s)\n", errno, strerror(errno));
385 exit(-1);
386 }
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300387
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200388 event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index];
389 event_array[nr_poll].events = POLLIN;
390 nr_poll++;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300391 }
392
393 if (filter != NULL) {
394 ret = ioctl(fd[nr_cpu][counter][thread_index],
395 PERF_EVENT_IOC_SET_FILTER, filter);
396 if (ret) {
397 error("failed to set filter with %d (%s)\n", errno,
398 strerror(errno));
399 exit(-1);
400 }
401 }
Li Zefanc171b552009-10-15 11:22:07 +0800402 }
Ingo Molnarf250c0302009-06-05 13:18:41 +0200403}
404
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300405static void open_counters(int cpu)
Ingo Molnarf250c0302009-06-05 13:18:41 +0200406{
407 int counter;
408
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200409 group_fd = -1;
Ingo Molnarf250c0302009-06-05 13:18:41 +0200410 for (counter = 0; counter < nr_counters; counter++)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300411 create_counter(counter, cpu);
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200412
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200413 nr_cpu++;
414}
415
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200416static int process_buildids(void)
417{
418 u64 size = lseek(output, 0, SEEK_CUR);
419
Arnaldo Carvalho de Melo9f591fd2010-03-11 15:53:11 -0300420 if (size == 0)
421 return 0;
422
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200423 session->fd = output;
424 return __perf_session__process_events(session, post_processing_offset,
425 size - post_processing_offset,
426 size, &build_id__mark_dso_hit_ops);
427}
428
Peter Zijlstraf5970552009-06-18 23:22:55 +0200429static void atexit_header(void)
430{
Tom Zanussic7929e42010-04-01 23:59:22 -0500431 if (!pipe_output) {
432 session->header.data_size += bytes_written;
Peter Zijlstraf5970552009-06-18 23:22:55 +0200433
Tom Zanussic7929e42010-04-01 23:59:22 -0500434 process_buildids();
435 perf_header__write(&session->header, output, true);
Tom Zanussic7929e42010-04-01 23:59:22 -0500436 }
Peter Zijlstraf5970552009-06-18 23:22:55 +0200437}
438
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300439static void event__synthesize_guest_os(struct machine *machine, void *data)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800440{
441 int err;
442 char *guest_kallsyms;
443 char path[PATH_MAX];
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300444 struct perf_session *psession = data;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800445
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300446 if (machine__is_host(machine))
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800447 return;
448
449 /*
450 *As for guest kernel when processing subcommand record&report,
451 *we arrange module mmap prior to guest kernel mmap and trigger
452 *a preload dso because default guest module symbols are loaded
453 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
454 *method is used to avoid symbol missing when the first addr is
455 *in module instead of in guest kernel.
456 */
457 err = event__synthesize_modules(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300458 psession, machine);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800459 if (err < 0)
460 pr_err("Couldn't record guest kernel [%d]'s reference"
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300461 " relocation symbol.\n", machine->pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800462
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300463 if (machine__is_default_guest(machine))
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800464 guest_kallsyms = (char *) symbol_conf.default_guest_kallsyms;
465 else {
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300466 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800467 guest_kallsyms = path;
468 }
469
470 /*
471 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
472 * have no _text sometimes.
473 */
474 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300475 psession, machine, "_text");
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800476 if (err < 0)
477 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300478 psession, machine, "_stext");
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800479 if (err < 0)
480 pr_err("Couldn't record guest kernel [%d]'s reference"
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300481 " relocation symbol.\n", machine->pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800482}
483
Frederic Weisbecker98402802010-05-02 22:05:29 +0200484static struct perf_event_header finished_round_event = {
485 .size = sizeof(struct perf_event_header),
486 .type = PERF_RECORD_FINISHED_ROUND,
487};
488
489static void mmap_read_all(void)
490{
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200491 int i;
Frederic Weisbecker98402802010-05-02 22:05:29 +0200492
493 for (i = 0; i < nr_cpu; i++) {
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200494 if (mmap_array[i].base)
495 mmap_read(&mmap_array[i]);
Frederic Weisbecker98402802010-05-02 22:05:29 +0200496 }
497
498 if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
499 write_output(&finished_round_event, sizeof(finished_round_event));
500}
501
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200502static int __cmd_record(int argc, const char **argv)
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200503{
504 int i, counter;
Peter Zijlstra97124d52009-06-02 15:52:24 +0200505 struct stat st;
Ingo Molnarabaff322009-06-02 22:59:57 +0200506 int flags;
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200507 int err;
Peter Zijlstra8b412662009-09-17 19:59:05 +0200508 unsigned long waking = 0;
Peter Zijlstra856e9662009-12-16 17:55:55 +0100509 int child_ready_pipe[2], go_pipe[2];
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300510 const bool forks = argc > 0;
Peter Zijlstra856e9662009-12-16 17:55:55 +0100511 char buf;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300512 struct machine *machine;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200513
514 page_size = sysconf(_SC_PAGE_SIZE);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200515
Peter Zijlstraf5970552009-06-18 23:22:55 +0200516 atexit(sig_atexit);
517 signal(SIGCHLD, sig_handler);
518 signal(SIGINT, sig_handler);
519
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200520 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
Peter Zijlstra856e9662009-12-16 17:55:55 +0100521 perror("failed to create pipes");
522 exit(-1);
523 }
524
Tom Zanussi529870e2010-04-01 23:59:16 -0500525 if (!strcmp(output_name, "-"))
526 pipe_output = 1;
527 else if (!stat(output_name, &st) && st.st_size) {
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200528 if (write_mode == WRITE_FORCE) {
Arnaldo Carvalho de Melob38d3462009-12-14 20:09:30 -0200529 char oldname[PATH_MAX];
530 snprintf(oldname, sizeof(oldname), "%s.old",
531 output_name);
532 unlink(oldname);
533 rename(output_name, oldname);
Pierre Habouzit266e0e22009-08-07 14:16:01 +0200534 }
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200535 } else if (write_mode == WRITE_APPEND) {
536 write_mode = WRITE_FORCE;
Peter Zijlstra97124d52009-06-02 15:52:24 +0200537 }
538
Xiao Guangrongf887f302010-02-04 16:46:42 +0800539 flags = O_CREAT|O_RDWR;
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200540 if (write_mode == WRITE_APPEND)
Peter Zijlstraf5970552009-06-18 23:22:55 +0200541 file_new = 0;
Ingo Molnarabaff322009-06-02 22:59:57 +0200542 else
543 flags |= O_TRUNC;
544
Tom Zanussi529870e2010-04-01 23:59:16 -0500545 if (pipe_output)
546 output = STDOUT_FILENO;
547 else
548 output = open(output_name, flags, S_IRUSR | S_IWUSR);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200549 if (output < 0) {
550 perror("failed to create output file");
551 exit(-1);
552 }
553
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200554 session = perf_session__new(output_name, O_WRONLY,
Tom Zanussi454c4072010-05-01 01:41:20 -0500555 write_mode == WRITE_FORCE, false);
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200556 if (session == NULL) {
Arnaldo Carvalho de Meloa9a70bb2009-11-17 01:18:11 -0200557 pr_err("Not enough memory for reading perf file header\n");
558 return -1;
559 }
560
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200561 if (!file_new) {
Tom Zanussi8dc58102010-04-01 23:59:15 -0500562 err = perf_header__read(session, output);
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200563 if (err < 0)
564 return err;
565 }
566
Tom Zanussidb620b12010-05-04 22:20:16 -0500567 if (have_tracepoints(attrs, nr_counters))
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200568 perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
Frederic Weisbecker03456a12009-10-06 23:36:47 +0200569
Peter Zijlstraf5970552009-06-18 23:22:55 +0200570 atexit(atexit_header);
571
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200572 if (forks) {
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300573 child_pid = fork();
Borislav Petkov2fb750e2010-05-31 23:18:18 +0200574 if (child_pid < 0) {
Peter Zijlstra856e9662009-12-16 17:55:55 +0100575 perror("failed to fork");
576 exit(-1);
Jens Axboe0a5ac842009-08-12 11:18:01 +0200577 }
Peter Zijlstra856e9662009-12-16 17:55:55 +0100578
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300579 if (!child_pid) {
Tom Zanussi529870e2010-04-01 23:59:16 -0500580 if (pipe_output)
581 dup2(2, 1);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100582 close(child_ready_pipe[0]);
583 close(go_pipe[1]);
584 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
585
586 /*
587 * Do a dummy execvp to get the PLT entry resolved,
588 * so we avoid the resolver overhead on the real
589 * execvp call.
590 */
591 execvp("", (char **)argv);
592
593 /*
594 * Tell the parent we're ready to go
595 */
596 close(child_ready_pipe[1]);
597
598 /*
599 * Wait until the parent tells us to go.
600 */
601 if (read(go_pipe[0], &buf, 1) == -1)
602 perror("unable to read pipe");
603
604 execvp(argv[0], (char **)argv);
605
606 perror(argv[0]);
607 exit(-1);
608 }
609
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300610 if (!system_wide && target_tid == -1 && target_pid == -1)
611 all_tids[0] = child_pid;
612
Peter Zijlstra856e9662009-12-16 17:55:55 +0100613 close(child_ready_pipe[1]);
614 close(go_pipe[0]);
615 /*
616 * wait for child to settle
617 */
618 if (read(child_ready_pipe[0], &buf, 1) == -1) {
619 perror("unable to read pipe");
620 exit(-1);
621 }
622 close(child_ready_pipe[0]);
623 }
624
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200625 if ((!system_wide && no_inherit) || profile_cpu != -1) {
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300626 open_counters(profile_cpu);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100627 } else {
Paul Mackerrasa12b51c2010-03-10 20:36:09 +1100628 nr_cpus = read_cpu_map();
Peter Zijlstra856e9662009-12-16 17:55:55 +0100629 for (i = 0; i < nr_cpus; i++)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300630 open_counters(cpumap[i]);
Jens Axboe0a5ac842009-08-12 11:18:01 +0200631 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200632
Tom Zanussi529870e2010-04-01 23:59:16 -0500633 if (pipe_output) {
634 err = perf_header__write_pipe(output);
635 if (err < 0)
636 return err;
637 } else if (file_new) {
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200638 err = perf_header__write(&session->header, output, false);
Arnaldo Carvalho de Melod5eed902009-11-19 14:55:56 -0200639 if (err < 0)
640 return err;
641 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200642
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200643 post_processing_offset = lseek(output, 0, SEEK_CUR);
644
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500645 if (pipe_output) {
646 err = event__synthesize_attrs(&session->header,
647 process_synthesized_event,
648 session);
649 if (err < 0) {
650 pr_err("Couldn't synthesize attrs.\n");
651 return err;
652 }
Tom Zanussicd19a032010-04-01 23:59:20 -0500653
654 err = event__synthesize_event_types(process_synthesized_event,
655 session);
656 if (err < 0) {
657 pr_err("Couldn't synthesize event_types.\n");
658 return err;
659 }
Tom Zanussi92155452010-04-01 23:59:21 -0500660
Tom Zanussi63e0c772010-05-03 00:14:48 -0500661 if (have_tracepoints(attrs, nr_counters)) {
662 /*
663 * FIXME err <= 0 here actually means that
664 * there were no tracepoints so its not really
665 * an error, just that we don't need to
666 * synthesize anything. We really have to
667 * return this more properly and also
668 * propagate errors that now are calling die()
669 */
670 err = event__synthesize_tracing_data(output, attrs,
671 nr_counters,
672 process_synthesized_event,
673 session);
674 if (err <= 0) {
675 pr_err("Couldn't record tracing data.\n");
676 return err;
677 }
Arnaldo Carvalho de Melo2c9faa02010-05-02 13:37:24 -0300678 advance_output(err);
Tom Zanussi63e0c772010-05-03 00:14:48 -0500679 }
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500680 }
681
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300682 machine = perf_session__find_host_machine(session);
683 if (!machine) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800684 pr_err("Couldn't find native kernel information.\n");
685 return -1;
686 }
687
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -0200688 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300689 session, machine, "_text");
Arnaldo Carvalho de Melo70162132010-03-30 18:27:39 -0300690 if (err < 0)
691 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300692 session, machine, "_stext");
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -0200693 if (err < 0) {
694 pr_err("Couldn't record kernel reference relocation symbol.\n");
695 return err;
696 }
697
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800698 err = event__synthesize_modules(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300699 session, machine);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -0200700 if (err < 0) {
701 pr_err("Couldn't record kernel reference relocation symbol.\n");
702 return err;
703 }
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800704 if (perf_guest)
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300705 perf_session__process_machines(session, event__synthesize_guest_os);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -0200706
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200707 if (!system_wide && profile_cpu == -1)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300708 event__synthesize_thread(target_tid, process_synthesized_event,
Arnaldo Carvalho de Melod8f66242009-12-13 19:50:24 -0200709 session);
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -0200710 else
Arnaldo Carvalho de Melod8f66242009-12-13 19:50:24 -0200711 event__synthesize_threads(process_synthesized_event, session);
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200712
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200713 if (realtime_prio) {
714 struct sched_param param;
715
716 param.sched_priority = realtime_prio;
717 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
Arnaldo Carvalho de Melo6beba7a2009-10-21 17:34:06 -0200718 pr_err("Could not set realtime priority.\n");
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200719 exit(-1);
720 }
721 }
722
Peter Zijlstra856e9662009-12-16 17:55:55 +0100723 /*
724 * Let the child rip
725 */
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200726 if (forks)
727 close(go_pipe[1]);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100728
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200729 for (;;) {
Ingo Molnar2debbc82009-06-05 14:29:10 +0200730 int hits = samples;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300731 int thread;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200732
Frederic Weisbecker98402802010-05-02 22:05:29 +0200733 mmap_read_all();
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200734
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200735 if (hits == samples) {
736 if (done)
737 break;
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200738 err = poll(event_array, nr_poll, -1);
Peter Zijlstra8b412662009-09-17 19:59:05 +0200739 waking++;
740 }
741
742 if (done) {
743 for (i = 0; i < nr_cpu; i++) {
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300744 for (counter = 0;
745 counter < nr_counters;
746 counter++) {
747 for (thread = 0;
748 thread < thread_num;
749 thread++)
750 ioctl(fd[i][counter][thread],
751 PERF_EVENT_IOC_DISABLE);
752 }
Peter Zijlstra8b412662009-09-17 19:59:05 +0200753 }
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200754 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200755 }
756
Peter Zijlstra8b412662009-09-17 19:59:05 +0200757 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
758
Ingo Molnar021e9f42009-06-03 19:27:19 +0200759 /*
760 * Approximate RIP event size: 24 bytes.
761 */
762 fprintf(stderr,
Ingo Molnar2debbc82009-06-05 14:29:10 +0200763 "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n",
Ingo Molnar021e9f42009-06-03 19:27:19 +0200764 (double)bytes_written / 1024.0 / 1024.0,
765 output_name,
766 bytes_written / 24);
Ingo Molnaraddc2782009-06-02 23:43:11 +0200767
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200768 return 0;
769}
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200770
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200771static const char * const record_usage[] = {
Mike Galbraith9e096752009-05-28 16:25:34 +0200772 "perf record [<options>] [<command>]",
773 "perf record [<options>] -- <command> [<options>]",
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200774 NULL
775};
776
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200777static bool force, append_file;
778
Ingo Molnar52425192009-05-26 09:17:18 +0200779static const struct option options[] = {
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200780 OPT_CALLBACK('e', "event", NULL, "event",
Thomas Gleixner86847b62009-06-06 12:24:17 +0200781 "event selector. use 'perf list' to list available events",
782 parse_events),
Li Zefanc171b552009-10-15 11:22:07 +0800783 OPT_CALLBACK(0, "filter", NULL, "filter",
784 "event filter", parse_filter),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200785 OPT_INTEGER('p', "pid", &target_pid,
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300786 "record events on existing process id"),
787 OPT_INTEGER('t', "tid", &target_tid,
788 "record events on existing thread id"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200789 OPT_INTEGER('r', "realtime", &realtime_prio,
790 "collect data with this RT SCHED_FIFO priority"),
Frederic Weisbeckerdaac07b2009-08-13 10:27:19 +0200791 OPT_BOOLEAN('R', "raw-samples", &raw_samples,
792 "collect raw sample records from all opened counters"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200793 OPT_BOOLEAN('a', "all-cpus", &system_wide,
794 "system-wide collection from all CPUs"),
Ingo Molnarabaff322009-06-02 22:59:57 +0200795 OPT_BOOLEAN('A', "append", &append_file,
796 "append to the output file to do incremental profiling"),
Jens Axboe0a5ac842009-08-12 11:18:01 +0200797 OPT_INTEGER('C', "profile_cpu", &profile_cpu,
798 "CPU to profile on"),
Peter Zijlstra97124d52009-06-02 15:52:24 +0200799 OPT_BOOLEAN('f', "force", &force,
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200800 "overwrite existing data file (deprecated)"),
Stephane Eranian3de29ca2010-05-17 12:20:43 -0300801 OPT_U64('c', "count", &user_interval, "event period to sample"),
Ingo Molnarabaff322009-06-02 22:59:57 +0200802 OPT_STRING('o', "output", &output_name, "file",
803 "output file name"),
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200804 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
805 "child tasks do not inherit counters"),
Arnaldo Carvalho de Melo19679362010-05-17 15:39:16 -0300806 OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
807 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200808 OPT_BOOLEAN('g', "call-graph", &call_graph,
809 "do call-graph (stack chain/backtrace) recording"),
Ian Munsiec0555642010-04-13 18:37:33 +1000810 OPT_INCR('v', "verbose", &verbose,
Ingo Molnar3da297a2009-06-07 17:39:02 +0200811 "be more verbose (show counter open errors, etc)"),
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200812 OPT_BOOLEAN('s', "stat", &inherit_stat,
813 "per thread counts"),
Anton Blanchard4bba8282009-07-16 15:44:29 +0200814 OPT_BOOLEAN('d', "data", &sample_address,
815 "Sample addresses"),
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200816 OPT_BOOLEAN('n', "no-samples", &no_samples,
817 "don't sample"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200818 OPT_END()
819};
820
Ingo Molnarf37a2912009-07-01 12:37:06 +0200821int cmd_record(int argc, const char **argv, const char *prefix __used)
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200822{
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300823 int i,j;
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200824
Anton Blancharda0541232009-07-22 23:04:12 +1000825 argc = parse_options(argc, argv, options, record_usage,
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200826 PARSE_OPT_STOP_AT_NON_OPTION);
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300827 if (!argc && target_pid == -1 && target_tid == -1 &&
828 !system_wide && profile_cpu == -1)
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200829 usage_with_options(record_usage, options);
830
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200831 if (force && append_file) {
832 fprintf(stderr, "Can't overwrite and append at the same time."
833 " You need to choose between -f and -A");
834 usage_with_options(record_usage, options);
835 } else if (append_file) {
836 write_mode = WRITE_APPEND;
837 } else {
838 write_mode = WRITE_FORCE;
839 }
840
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200841 symbol__init();
842
Peter Zijlstrabbd36e52009-06-11 23:11:50 +0200843 if (!nr_counters) {
844 nr_counters = 1;
845 attrs[0].type = PERF_TYPE_HARDWARE;
846 attrs[0].config = PERF_COUNT_HW_CPU_CYCLES;
847 }
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200848
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300849 if (target_pid != -1) {
850 target_tid = target_pid;
851 thread_num = find_all_tid(target_pid, &all_tids);
852 if (thread_num <= 0) {
853 fprintf(stderr, "Can't find all threads of pid %d\n",
854 target_pid);
855 usage_with_options(record_usage, options);
856 }
857 } else {
858 all_tids=malloc(sizeof(pid_t));
859 if (!all_tids)
860 return -ENOMEM;
861
862 all_tids[0] = target_tid;
863 thread_num = 1;
864 }
865
866 for (i = 0; i < MAX_NR_CPUS; i++) {
867 for (j = 0; j < MAX_COUNTERS; j++) {
868 fd[i][j] = malloc(sizeof(int)*thread_num);
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200869 if (!fd[i][j])
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300870 return -ENOMEM;
871 }
872 }
873 event_array = malloc(
874 sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
875 if (!event_array)
876 return -ENOMEM;
877
Stephane Eranian3de29ca2010-05-17 12:20:43 -0300878 if (user_interval != ULLONG_MAX)
Frederic Weisbeckerf9212812010-04-14 22:09:02 +0200879 default_interval = user_interval;
880 if (user_freq != UINT_MAX)
881 freq = user_freq;
882
Mike Galbraith7e4ff9e2009-10-12 07:56:03 +0200883 /*
884 * User specified count overrides default frequency.
885 */
886 if (default_interval)
887 freq = 0;
888 else if (freq) {
889 default_interval = freq;
890 } else {
891 fprintf(stderr, "frequency and count are zero, aborting\n");
892 exit(EXIT_FAILURE);
893 }
894
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200895 return __cmd_record(argc, argv);
896}