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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 pid_t target_pid = -1;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030053static pid_t target_tid = -1;
54static pid_t *all_tids = NULL;
55static int thread_num = 0;
Ingo Molnar42e59d72009-10-06 15:14:21 +020056static pid_t child_pid = -1;
Stephane Eranian2e6cdf92010-05-12 10:40:01 +020057static bool no_inherit = false;
Frederic Weisbecker7865e812010-04-14 19:42:07 +020058static enum write_mode_t write_mode = WRITE_FORCE;
Ian Munsiec0555642010-04-13 18:37:33 +100059static bool call_graph = false;
60static bool inherit_stat = false;
61static bool no_samples = false;
62static bool sample_address = false;
Stephane Eraniana1ac1d32010-06-17 11:39:01 +020063static bool no_buildid = 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;
Stephane Eranianc45c6ea2010-05-28 12:00:01 +020077static const char *cpu_list;
Peter Zijlstraf5970552009-06-18 23:22:55 +020078
Ingo Molnara21ca2c2009-06-06 09:58:57 +020079struct mmap_data {
80 int counter;
81 void *base;
82 unsigned int mask;
83 unsigned int prev;
84};
85
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +020086static struct mmap_data mmap_array[MAX_NR_CPUS];
Ingo Molnara21ca2c2009-06-06 09:58:57 +020087
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +020088static unsigned long mmap_read_head(struct mmap_data *md)
Peter Zijlstrade9ac072009-04-08 15:01:31 +020089{
Ingo Molnarcdd6c482009-09-21 12:02:48 +020090 struct perf_event_mmap_page *pc = md->base;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +020091 long head;
Peter Zijlstrade9ac072009-04-08 15:01:31 +020092
93 head = pc->data_head;
94 rmb();
95
96 return head;
97}
98
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +020099static void mmap_write_tail(struct mmap_data *md, unsigned long tail)
100{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200101 struct perf_event_mmap_page *pc = md->base;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +0200102
103 /*
104 * ensure all reads are done before we write the tail out.
105 */
106 /* mb(); */
107 pc->data_tail = tail;
108}
109
Tom Zanussi92155452010-04-01 23:59:21 -0500110static void advance_output(size_t size)
111{
112 bytes_written += size;
113}
114
Peter Zijlstraf5970552009-06-18 23:22:55 +0200115static 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
Arnaldo Carvalho de Melod8f66242009-12-13 19:50:24 -0200130static int process_synthesized_event(event_t *event,
131 struct perf_session *self __used)
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -0200132{
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200133 write_output(event, event->header.size);
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -0200134 return 0;
135}
136
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200137static 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
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200146 /*
147 * If we're further behind than half the buffer, there's a chance
Ingo Molnar2debbc82009-06-05 14:29:10 +0200148 * the writer will bite our tail and mess up the samples under us.
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200149 *
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;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +0200155 if (diff < 0) {
Russ Andersonef365ce2010-05-18 17:52:40 -0500156 fprintf(stderr, "WARNING: failed to keep up with mmap data\n");
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200157 /*
158 * head points to a known good entry, start there.
159 */
160 old = head;
161 }
162
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200163 if (old != head)
Ingo Molnar2debbc82009-06-05 14:29:10 +0200164 samples++;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200165
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;
Ingo Molnar021e9f42009-06-03 19:27:19 +0200172
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200173 write_output(buf, size);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200174 }
175
176 buf = &data[old & md->mask];
177 size = head - old;
178 old += size;
Ingo Molnar021e9f42009-06-03 19:27:19 +0200179
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200180 write_output(buf, size);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200181
182 md->prev = old;
Peter Zijlstra9d91a6f2009-06-18 11:40:28 +0200183 mmap_write_tail(md, old);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200184}
185
186static volatile int done = 0;
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200187static volatile int signr = -1;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200188
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200189static void sig_handler(int sig)
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200190{
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200191 done = 1;
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200192 signr = sig;
193}
194
195static void sig_atexit(void)
196{
Ian Munsie5ffc8882010-06-09 18:38:00 +1000197 if (child_pid > 0)
Chris Wilson933da832009-10-04 01:35:01 +0100198 kill(child_pid, SIGTERM);
199
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200200 if (signr == -1)
201 return;
202
203 signal(signr, SIG_DFL);
204 kill(getpid(), signr);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200205}
206
Ingo Molnarf250c0302009-06-05 13:18:41 +0200207static int group_fd;
208
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200209static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200210{
211 struct perf_header_attr *h_attr;
212
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200213 if (nr < session->header.attrs) {
214 h_attr = session->header.attr[nr];
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200215 } else {
216 h_attr = perf_header_attr__new(a);
Arnaldo Carvalho de Melodc79c0f2009-11-16 19:30:26 -0200217 if (h_attr != NULL)
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200218 if (perf_header__add_attr(&session->header, h_attr) < 0) {
Arnaldo Carvalho de Melo11deb1f2009-11-17 01:18:09 -0200219 perf_header_attr__delete(h_attr);
220 h_attr = NULL;
221 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200222 }
223
224 return h_attr;
225}
226
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300227static void create_counter(int counter, int cpu)
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200228{
Li Zefanc171b552009-10-15 11:22:07 +0800229 char *filter = filters[counter];
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200230 struct perf_event_attr *attr = attrs + counter;
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200231 struct perf_header_attr *h_attr;
232 int track = !counter; /* only the first counter needs these */
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300233 int thread_index;
Li Zefanc171b552009-10-15 11:22:07 +0800234 int ret;
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200235 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;
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200245
Frederic Weisbecker3a9f1312009-08-13 10:27:18 +0200246 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200247
Eric B Munson8907fd62010-03-05 12:51:05 -0300248 if (nr_counters > 1)
249 attr->sample_type |= PERF_SAMPLE_ID;
250
Frederic Weisbeckerf9212812010-04-14 22:09:02 +0200251 /*
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 &&
Stephane Eranian3de29ca2010-05-17 12:20:43 -0300256 user_interval != ULLONG_MAX)) {
Frederic Weisbeckerf9212812010-04-14 22:09:02 +0200257 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 }
Ingo Molnar1dba15e2009-06-05 18:37:22 +0200264 }
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200265
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200266 if (no_samples)
267 attr->sample_freq = 0;
268
269 if (inherit_stat)
270 attr->inherit_stat = 1;
271
Eric B Munson3af9e852010-05-18 15:30:49 +0100272 if (sample_address) {
Anton Blanchard4bba8282009-07-16 15:44:29 +0200273 attr->sample_type |= PERF_SAMPLE_ADDR;
Eric B Munson3af9e852010-05-18 15:30:49 +0100274 attr->mmap_data = track;
275 }
Anton Blanchard4bba8282009-07-16 15:44:29 +0200276
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200277 if (call_graph)
278 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
279
Arun Sharmaf60f3592010-06-04 11:27:10 -0300280 if (system_wide)
281 attr->sample_type |= PERF_SAMPLE_CPU;
282
Ingo Molnarcd6feee2009-09-02 20:20:38 +0200283 if (raw_samples) {
Ingo Molnar6ddf2592009-09-03 12:00:22 +0200284 attr->sample_type |= PERF_SAMPLE_TIME;
Frederic Weisbeckerdaac07b2009-08-13 10:27:19 +0200285 attr->sample_type |= PERF_SAMPLE_RAW;
Ingo Molnarcd6feee2009-09-02 20:20:38 +0200286 attr->sample_type |= PERF_SAMPLE_CPU;
287 }
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200288
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200289 attr->mmap = track;
290 attr->comm = track;
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200291 attr->inherit = !no_inherit;
292 if (target_pid == -1 && target_tid == -1 && !system_wide) {
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300293 attr->disabled = 1;
Eric B Munsonbedbfde2010-03-15 11:46:57 -0300294 attr->enable_on_exec = 1;
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300295 }
Eric B Munsonbedbfde2010-03-15 11:46:57 -0300296
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300297 for (thread_index = 0; thread_index < thread_num; thread_index++) {
Ingo Molnar3da297a2009-06-07 17:39:02 +0200298try_again:
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300299 fd[nr_cpu][counter][thread_index] = sys_perf_event_open(attr,
300 all_tids[thread_index], cpu, group_fd, 0);
Ingo Molnarf250c0302009-06-05 13:18:41 +0200301
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300302 if (fd[nr_cpu][counter][thread_index] < 0) {
303 int err = errno;
Ingo Molnarf250c0302009-06-05 13:18:41 +0200304
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300305 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");
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200309 else if (err == ENODEV && cpu_list) {
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300310 die("No such device - did you specify"
311 " an out-of-range profile CPU?\n");
312 }
Ingo Molnar3da297a2009-06-07 17:39:02 +0200313
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300314 /*
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) {
Ingo Molnar3da297a2009-06-07 17:39:02 +0200321
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300322 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));
Simon Kaempfleinbfd45112009-11-16 15:25:53 +1000331
332#if defined(__i386__) || defined(__x86_64__)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300333 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");
Simon Kaempfleinbfd45112009-11-16 15:25:53 +1000338#endif
339
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300340 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200341 exit(-1);
342 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200343
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300344 h_attr = get_header_attr(attr, counter);
345 if (h_attr == NULL)
346 die("nomem\n");
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200347
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300348 if (!file_new) {
349 if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
350 fprintf(stderr, "incompatible append\n");
351 exit(-1);
352 }
353 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200354
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300355 if (read(fd[nr_cpu][counter][thread_index], &read_data, sizeof(read_data)) == -1) {
Matt Fleming0ab73682010-08-28 16:46:19 +0100356 perror("Unable to read perf file descriptor");
Ingo Molnarea57c4f2009-09-13 18:15:54 +0200357 exit(-1);
358 }
Peter Zijlstra4502d772009-06-10 15:03:06 +0200359
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300360 if (perf_header_attr__add_id(h_attr, read_data.id) < 0) {
361 pr_warning("Not enough memory to add id\n");
Li Zefanc171b552009-10-15 11:22:07 +0800362 exit(-1);
363 }
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300364
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];
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300373
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200374 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 }
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300393
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200394 event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index];
395 event_array[nr_poll].events = POLLIN;
396 nr_poll++;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300397 }
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 }
Li Zefanc171b552009-10-15 11:22:07 +0800408 }
Ingo Molnarf250c0302009-06-05 13:18:41 +0200409}
410
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300411static void open_counters(int cpu)
Ingo Molnarf250c0302009-06-05 13:18:41 +0200412{
413 int counter;
414
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200415 group_fd = -1;
Ingo Molnarf250c0302009-06-05 13:18:41 +0200416 for (counter = 0; counter < nr_counters; counter++)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300417 create_counter(counter, cpu);
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200418
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200419 nr_cpu++;
420}
421
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200422static int process_buildids(void)
423{
424 u64 size = lseek(output, 0, SEEK_CUR);
425
Arnaldo Carvalho de Melo9f591fd2010-03-11 15:53:11 -0300426 if (size == 0)
427 return 0;
428
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200429 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
Peter Zijlstraf5970552009-06-18 23:22:55 +0200435static void atexit_header(void)
436{
Tom Zanussic7929e42010-04-01 23:59:22 -0500437 if (!pipe_output) {
438 session->header.data_size += bytes_written;
Peter Zijlstraf5970552009-06-18 23:22:55 +0200439
Tom Zanussic7929e42010-04-01 23:59:22 -0500440 process_buildids();
441 perf_header__write(&session->header, output, true);
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300442 perf_session__delete(session);
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -0300443 symbol__exit();
Tom Zanussic7929e42010-04-01 23:59:22 -0500444 }
Peter Zijlstraf5970552009-06-18 23:22:55 +0200445}
446
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300447static void event__synthesize_guest_os(struct machine *machine, void *data)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800448{
449 int err;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300450 struct perf_session *psession = data;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800451
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300452 if (machine__is_host(machine))
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800453 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,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300464 psession, machine);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800465 if (err < 0)
466 pr_err("Couldn't record guest kernel [%d]'s reference"
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300467 " relocation symbol.\n", machine->pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800468
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800469 /*
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,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300474 psession, machine, "_text");
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800475 if (err < 0)
476 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300477 psession, machine, "_stext");
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800478 if (err < 0)
479 pr_err("Couldn't record guest kernel [%d]'s reference"
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300480 " relocation symbol.\n", machine->pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800481}
482
Frederic Weisbecker98402802010-05-02 22:05:29 +0200483static struct perf_event_header finished_round_event = {
484 .size = sizeof(struct perf_event_header),
485 .type = PERF_RECORD_FINISHED_ROUND,
486};
487
488static void mmap_read_all(void)
489{
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200490 int i;
Frederic Weisbecker98402802010-05-02 22:05:29 +0200491
492 for (i = 0; i < nr_cpu; i++) {
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200493 if (mmap_array[i].base)
494 mmap_read(&mmap_array[i]);
Frederic Weisbecker98402802010-05-02 22:05:29 +0200495 }
496
497 if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
498 write_output(&finished_round_event, sizeof(finished_round_event));
499}
500
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200501static int __cmd_record(int argc, const char **argv)
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200502{
503 int i, counter;
Peter Zijlstra97124d52009-06-02 15:52:24 +0200504 struct stat st;
Ingo Molnarabaff322009-06-02 22:59:57 +0200505 int flags;
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200506 int err;
Peter Zijlstra8b412662009-09-17 19:59:05 +0200507 unsigned long waking = 0;
Peter Zijlstra856e9662009-12-16 17:55:55 +0100508 int child_ready_pipe[2], go_pipe[2];
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300509 const bool forks = argc > 0;
Peter Zijlstra856e9662009-12-16 17:55:55 +0100510 char buf;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300511 struct machine *machine;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200512
513 page_size = sysconf(_SC_PAGE_SIZE);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200514
Peter Zijlstraf5970552009-06-18 23:22:55 +0200515 atexit(sig_atexit);
516 signal(SIGCHLD, sig_handler);
517 signal(SIGINT, sig_handler);
518
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200519 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
Peter Zijlstra856e9662009-12-16 17:55:55 +0100520 perror("failed to create pipes");
521 exit(-1);
522 }
523
Tom Zanussi529870e2010-04-01 23:59:16 -0500524 if (!strcmp(output_name, "-"))
525 pipe_output = 1;
526 else if (!stat(output_name, &st) && st.st_size) {
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200527 if (write_mode == WRITE_FORCE) {
Arnaldo Carvalho de Melob38d3462009-12-14 20:09:30 -0200528 char oldname[PATH_MAX];
529 snprintf(oldname, sizeof(oldname), "%s.old",
530 output_name);
531 unlink(oldname);
532 rename(output_name, oldname);
Pierre Habouzit266e0e22009-08-07 14:16:01 +0200533 }
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200534 } else if (write_mode == WRITE_APPEND) {
535 write_mode = WRITE_FORCE;
Peter Zijlstra97124d52009-06-02 15:52:24 +0200536 }
537
Xiao Guangrongf887f302010-02-04 16:46:42 +0800538 flags = O_CREAT|O_RDWR;
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200539 if (write_mode == WRITE_APPEND)
Peter Zijlstraf5970552009-06-18 23:22:55 +0200540 file_new = 0;
Ingo Molnarabaff322009-06-02 22:59:57 +0200541 else
542 flags |= O_TRUNC;
543
Tom Zanussi529870e2010-04-01 23:59:16 -0500544 if (pipe_output)
545 output = STDOUT_FILENO;
546 else
547 output = open(output_name, flags, S_IRUSR | S_IWUSR);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200548 if (output < 0) {
549 perror("failed to create output file");
550 exit(-1);
551 }
552
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200553 session = perf_session__new(output_name, O_WRONLY,
Tom Zanussi454c4072010-05-01 01:41:20 -0500554 write_mode == WRITE_FORCE, false);
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200555 if (session == NULL) {
Arnaldo Carvalho de Meloa9a70bb2009-11-17 01:18:11 -0200556 pr_err("Not enough memory for reading perf file header\n");
557 return -1;
558 }
559
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200560 if (!file_new) {
Tom Zanussi8dc58102010-04-01 23:59:15 -0500561 err = perf_header__read(session, output);
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200562 if (err < 0)
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300563 goto out_delete_session;
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200564 }
565
Tom Zanussidb620b12010-05-04 22:20:16 -0500566 if (have_tracepoints(attrs, nr_counters))
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200567 perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
Frederic Weisbecker03456a12009-10-06 23:36:47 +0200568
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300569 /*
570 * perf_session__delete(session) will be called at atexit_header()
571 */
Peter Zijlstraf5970552009-06-18 23:22:55 +0200572 atexit(atexit_header);
573
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200574 if (forks) {
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300575 child_pid = fork();
Borislav Petkov2fb750e2010-05-31 23:18:18 +0200576 if (child_pid < 0) {
Peter Zijlstra856e9662009-12-16 17:55:55 +0100577 perror("failed to fork");
578 exit(-1);
Jens Axboe0a5ac842009-08-12 11:18:01 +0200579 }
Peter Zijlstra856e9662009-12-16 17:55:55 +0100580
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300581 if (!child_pid) {
Tom Zanussi529870e2010-04-01 23:59:16 -0500582 if (pipe_output)
583 dup2(2, 1);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100584 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
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300612 if (!system_wide && target_tid == -1 && target_pid == -1)
613 all_tids[0] = child_pid;
614
Peter Zijlstra856e9662009-12-16 17:55:55 +0100615 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
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200627 nr_cpus = read_cpu_map(cpu_list);
628 if (nr_cpus < 1) {
Matt Fleming0ab73682010-08-28 16:46:19 +0100629 perror("failed to collect number of CPUs");
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200630 return -1;
631 }
632
633 if (!system_wide && no_inherit && !cpu_list) {
634 open_counters(-1);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100635 } else {
636 for (i = 0; i < nr_cpus; i++)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300637 open_counters(cpumap[i]);
Jens Axboe0a5ac842009-08-12 11:18:01 +0200638 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200639
Tom Zanussi529870e2010-04-01 23:59:16 -0500640 if (pipe_output) {
641 err = perf_header__write_pipe(output);
642 if (err < 0)
643 return err;
644 } else if (file_new) {
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200645 err = perf_header__write(&session->header, output, false);
Arnaldo Carvalho de Melod5eed902009-11-19 14:55:56 -0200646 if (err < 0)
647 return err;
648 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200649
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200650 post_processing_offset = lseek(output, 0, SEEK_CUR);
651
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500652 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 }
Tom Zanussicd19a032010-04-01 23:59:20 -0500660
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 }
Tom Zanussi92155452010-04-01 23:59:21 -0500667
Tom Zanussi63e0c772010-05-03 00:14:48 -0500668 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 }
Arnaldo Carvalho de Melo2c9faa02010-05-02 13:37:24 -0300685 advance_output(err);
Tom Zanussi63e0c772010-05-03 00:14:48 -0500686 }
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500687 }
688
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300689 machine = perf_session__find_host_machine(session);
690 if (!machine) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800691 pr_err("Couldn't find native kernel information.\n");
692 return -1;
693 }
694
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -0200695 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300696 session, machine, "_text");
Arnaldo Carvalho de Melo70162132010-03-30 18:27:39 -0300697 if (err < 0)
698 err = event__synthesize_kernel_mmap(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300699 session, machine, "_stext");
Arnaldo Carvalho de Meloc1a3a4b2010-11-22 14:01:55 -0200700 if (err < 0)
701 pr_err("Couldn't record kernel reference relocation symbol\n"
702 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
703 "Check /proc/kallsyms permission or run as root.\n");
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -0200704
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800705 err = event__synthesize_modules(process_synthesized_event,
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300706 session, machine);
Arnaldo Carvalho de Meloc1a3a4b2010-11-22 14:01:55 -0200707 if (err < 0)
708 pr_err("Couldn't record kernel module information.\n"
709 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
710 "Check /proc/modules permission or run as root.\n");
711
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800712 if (perf_guest)
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300713 perf_session__process_machines(session, event__synthesize_guest_os);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -0200714
Stephane Eraniancf103a12010-06-16 20:59:01 +0200715 if (!system_wide)
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300716 event__synthesize_thread(target_tid, process_synthesized_event,
Arnaldo Carvalho de Melod8f66242009-12-13 19:50:24 -0200717 session);
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -0200718 else
Arnaldo Carvalho de Melod8f66242009-12-13 19:50:24 -0200719 event__synthesize_threads(process_synthesized_event, session);
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200720
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200721 if (realtime_prio) {
722 struct sched_param param;
723
724 param.sched_priority = realtime_prio;
725 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
Arnaldo Carvalho de Melo6beba7a2009-10-21 17:34:06 -0200726 pr_err("Could not set realtime priority.\n");
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200727 exit(-1);
728 }
729 }
730
Peter Zijlstra856e9662009-12-16 17:55:55 +0100731 /*
732 * Let the child rip
733 */
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200734 if (forks)
735 close(go_pipe[1]);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100736
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200737 for (;;) {
Ingo Molnar2debbc82009-06-05 14:29:10 +0200738 int hits = samples;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300739 int thread;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200740
Frederic Weisbecker98402802010-05-02 22:05:29 +0200741 mmap_read_all();
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200742
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200743 if (hits == samples) {
744 if (done)
745 break;
Arnaldo Carvalho de Melo4dc0a042009-11-19 14:55:55 -0200746 err = poll(event_array, nr_poll, -1);
Peter Zijlstra8b412662009-09-17 19:59:05 +0200747 waking++;
748 }
749
750 if (done) {
751 for (i = 0; i < nr_cpu; i++) {
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300752 for (counter = 0;
753 counter < nr_counters;
754 counter++) {
755 for (thread = 0;
756 thread < thread_num;
757 thread++)
758 ioctl(fd[i][counter][thread],
759 PERF_EVENT_IOC_DISABLE);
760 }
Peter Zijlstra8b412662009-09-17 19:59:05 +0200761 }
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200762 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200763 }
764
Arnaldo Carvalho de Melob44308f2010-10-26 15:20:09 -0200765 if (quiet)
766 return 0;
767
Peter Zijlstra8b412662009-09-17 19:59:05 +0200768 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
769
Ingo Molnar021e9f42009-06-03 19:27:19 +0200770 /*
771 * Approximate RIP event size: 24 bytes.
772 */
773 fprintf(stderr,
Ingo Molnar2debbc82009-06-05 14:29:10 +0200774 "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n",
Ingo Molnar021e9f42009-06-03 19:27:19 +0200775 (double)bytes_written / 1024.0 / 1024.0,
776 output_name,
777 bytes_written / 24);
Ingo Molnaraddc2782009-06-02 23:43:11 +0200778
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200779 return 0;
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300780
781out_delete_session:
782 perf_session__delete(session);
783 return err;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200784}
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200785
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200786static const char * const record_usage[] = {
Mike Galbraith9e096752009-05-28 16:25:34 +0200787 "perf record [<options>] [<command>]",
788 "perf record [<options>] -- <command> [<options>]",
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200789 NULL
790};
791
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200792static bool force, append_file;
793
Tom Zanussibca647a2010-11-10 08:11:30 -0600794const struct option record_options[] = {
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200795 OPT_CALLBACK('e', "event", NULL, "event",
Thomas Gleixner86847b62009-06-06 12:24:17 +0200796 "event selector. use 'perf list' to list available events",
797 parse_events),
Li Zefanc171b552009-10-15 11:22:07 +0800798 OPT_CALLBACK(0, "filter", NULL, "filter",
799 "event filter", parse_filter),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200800 OPT_INTEGER('p', "pid", &target_pid,
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300801 "record events on existing process id"),
802 OPT_INTEGER('t', "tid", &target_tid,
803 "record events on existing thread id"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200804 OPT_INTEGER('r', "realtime", &realtime_prio,
805 "collect data with this RT SCHED_FIFO priority"),
Frederic Weisbeckerdaac07b2009-08-13 10:27:19 +0200806 OPT_BOOLEAN('R', "raw-samples", &raw_samples,
807 "collect raw sample records from all opened counters"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200808 OPT_BOOLEAN('a', "all-cpus", &system_wide,
809 "system-wide collection from all CPUs"),
Ingo Molnarabaff322009-06-02 22:59:57 +0200810 OPT_BOOLEAN('A', "append", &append_file,
811 "append to the output file to do incremental profiling"),
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200812 OPT_STRING('C', "cpu", &cpu_list, "cpu",
813 "list of cpus to monitor"),
Peter Zijlstra97124d52009-06-02 15:52:24 +0200814 OPT_BOOLEAN('f', "force", &force,
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200815 "overwrite existing data file (deprecated)"),
Stephane Eranian3de29ca2010-05-17 12:20:43 -0300816 OPT_U64('c', "count", &user_interval, "event period to sample"),
Ingo Molnarabaff322009-06-02 22:59:57 +0200817 OPT_STRING('o', "output", &output_name, "file",
818 "output file name"),
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200819 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
820 "child tasks do not inherit counters"),
Arnaldo Carvalho de Melo19679362010-05-17 15:39:16 -0300821 OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
822 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
Ingo Molnar3efa1cc92009-06-14 15:04:15 +0200823 OPT_BOOLEAN('g', "call-graph", &call_graph,
824 "do call-graph (stack chain/backtrace) recording"),
Ian Munsiec0555642010-04-13 18:37:33 +1000825 OPT_INCR('v', "verbose", &verbose,
Ingo Molnar3da297a2009-06-07 17:39:02 +0200826 "be more verbose (show counter open errors, etc)"),
Arnaldo Carvalho de Melob44308f2010-10-26 15:20:09 -0200827 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200828 OPT_BOOLEAN('s', "stat", &inherit_stat,
829 "per thread counts"),
Anton Blanchard4bba8282009-07-16 15:44:29 +0200830 OPT_BOOLEAN('d', "data", &sample_address,
831 "Sample addresses"),
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200832 OPT_BOOLEAN('n', "no-samples", &no_samples,
833 "don't sample"),
Stephane Eraniana1ac1d32010-06-17 11:39:01 +0200834 OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid,
835 "do not update the buildid cache"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200836 OPT_END()
837};
838
Ingo Molnarf37a2912009-07-01 12:37:06 +0200839int cmd_record(int argc, const char **argv, const char *prefix __used)
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200840{
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300841 int i, j, err = -ENOMEM;
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200842
Tom Zanussibca647a2010-11-10 08:11:30 -0600843 argc = parse_options(argc, argv, record_options, record_usage,
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200844 PARSE_OPT_STOP_AT_NON_OPTION);
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300845 if (!argc && target_pid == -1 && target_tid == -1 &&
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200846 !system_wide && !cpu_list)
Tom Zanussibca647a2010-11-10 08:11:30 -0600847 usage_with_options(record_usage, record_options);
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200848
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200849 if (force && append_file) {
850 fprintf(stderr, "Can't overwrite and append at the same time."
851 " You need to choose between -f and -A");
Tom Zanussibca647a2010-11-10 08:11:30 -0600852 usage_with_options(record_usage, record_options);
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200853 } else if (append_file) {
854 write_mode = WRITE_APPEND;
855 } else {
856 write_mode = WRITE_FORCE;
857 }
858
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200859 symbol__init();
Stephane Eraniana1ac1d32010-06-17 11:39:01 +0200860 if (no_buildid)
861 disable_buildid_cache();
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200862
Peter Zijlstrabbd36e52009-06-11 23:11:50 +0200863 if (!nr_counters) {
864 nr_counters = 1;
865 attrs[0].type = PERF_TYPE_HARDWARE;
866 attrs[0].config = PERF_COUNT_HW_CPU_CYCLES;
867 }
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200868
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300869 if (target_pid != -1) {
870 target_tid = target_pid;
871 thread_num = find_all_tid(target_pid, &all_tids);
872 if (thread_num <= 0) {
873 fprintf(stderr, "Can't find all threads of pid %d\n",
874 target_pid);
Tom Zanussibca647a2010-11-10 08:11:30 -0600875 usage_with_options(record_usage, record_options);
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300876 }
877 } else {
878 all_tids=malloc(sizeof(pid_t));
879 if (!all_tids)
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -0300880 goto out_symbol_exit;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300881
882 all_tids[0] = target_tid;
883 thread_num = 1;
884 }
885
886 for (i = 0; i < MAX_NR_CPUS; i++) {
887 for (j = 0; j < MAX_COUNTERS; j++) {
888 fd[i][j] = malloc(sizeof(int)*thread_num);
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200889 if (!fd[i][j])
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300890 goto out_free_fd;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300891 }
892 }
893 event_array = malloc(
894 sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
895 if (!event_array)
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300896 goto out_free_fd;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300897
Stephane Eranian3de29ca2010-05-17 12:20:43 -0300898 if (user_interval != ULLONG_MAX)
Frederic Weisbeckerf9212812010-04-14 22:09:02 +0200899 default_interval = user_interval;
900 if (user_freq != UINT_MAX)
901 freq = user_freq;
902
Mike Galbraith7e4ff9e2009-10-12 07:56:03 +0200903 /*
904 * User specified count overrides default frequency.
905 */
906 if (default_interval)
907 freq = 0;
908 else if (freq) {
909 default_interval = freq;
910 } else {
911 fprintf(stderr, "frequency and count are zero, aborting\n");
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300912 err = -EINVAL;
913 goto out_free_event_array;
Mike Galbraith7e4ff9e2009-10-12 07:56:03 +0200914 }
915
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300916 err = __cmd_record(argc, argv);
917
918out_free_event_array:
919 free(event_array);
920out_free_fd:
921 for (i = 0; i < MAX_NR_CPUS; i++) {
922 for (j = 0; j < MAX_COUNTERS; j++)
923 free(fd[i][j]);
924 }
925 free(all_tids);
926 all_tids = NULL;
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -0300927out_symbol_exit:
928 symbol__exit();
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300929 return err;
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200930}