Ingo Molnar | abaff32 | 2009-06-02 22:59:57 +0200 | [diff] [blame] | 1 | /* |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 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. |
Ingo Molnar | abaff32 | 2009-06-02 22:59:57 +0200 | [diff] [blame] | 7 | */ |
Xiao Guangrong | b8f46c5 | 2010-02-03 11:53:14 +0800 | [diff] [blame] | 8 | #define _FILE_OFFSET_BITS 64 |
| 9 | |
Ingo Molnar | 16f762a | 2009-05-27 09:10:38 +0200 | [diff] [blame] | 10 | #include "builtin.h" |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 11 | |
| 12 | #include "perf.h" |
| 13 | |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 14 | #include "util/build-id.h" |
Thomas Gleixner | 6eda583 | 2009-05-01 18:29:57 +0200 | [diff] [blame] | 15 | #include "util/util.h" |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 16 | #include "util/parse-options.h" |
Ingo Molnar | 8ad8db3 | 2009-05-26 11:10:09 +0200 | [diff] [blame] | 17 | #include "util/parse-events.h" |
Thomas Gleixner | 6eda583 | 2009-05-01 18:29:57 +0200 | [diff] [blame] | 18 | |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 19 | #include "util/header.h" |
Frederic Weisbecker | 66e274f | 2009-08-12 11:07:25 +0200 | [diff] [blame] | 20 | #include "util/event.h" |
Frederic Weisbecker | 8f28827 | 2009-08-16 22:05:48 +0200 | [diff] [blame] | 21 | #include "util/debug.h" |
Arnaldo Carvalho de Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 22 | #include "util/session.h" |
Arnaldo Carvalho de Melo | 8d06367 | 2009-11-04 18:50:43 -0200 | [diff] [blame] | 23 | #include "util/symbol.h" |
Paul Mackerras | a12b51c | 2010-03-10 20:36:09 +1100 | [diff] [blame] | 24 | #include "util/cpumap.h" |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 25 | |
Peter Zijlstra | 97124d5 | 2009-06-02 15:52:24 +0200 | [diff] [blame] | 26 | #include <unistd.h> |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 27 | #include <sched.h> |
Arnaldo Carvalho de Melo | a41794c | 2010-05-18 18:29:23 -0300 | [diff] [blame] | 28 | #include <sys/mman.h> |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 29 | |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 30 | enum write_mode_t { |
| 31 | WRITE_FORCE, |
| 32 | WRITE_APPEND |
| 33 | }; |
| 34 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 35 | static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 36 | |
Stephane Eranian | 3de29ca | 2010-05-17 12:20:43 -0300 | [diff] [blame] | 37 | static u64 user_interval = ULLONG_MAX; |
| 38 | static u64 default_interval = 0; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 39 | |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 40 | static int nr_cpus = 0; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 41 | static unsigned int page_size; |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 42 | static unsigned int mmap_pages = 128; |
Frederic Weisbecker | f921281 | 2010-04-14 22:09:02 +0200 | [diff] [blame] | 43 | static unsigned int user_freq = UINT_MAX; |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 44 | static int freq = 1000; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 45 | static int output; |
Tom Zanussi | 529870e | 2010-04-01 23:59:16 -0500 | [diff] [blame] | 46 | static int pipe_output = 0; |
Ingo Molnar | 23ac9cb | 2009-05-27 09:33:18 +0200 | [diff] [blame] | 47 | static const char *output_name = "perf.data"; |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 48 | static int group = 0; |
Arnaldo Carvalho de Melo | 1967936 | 2010-05-17 15:39:16 -0300 | [diff] [blame] | 49 | static int realtime_prio = 0; |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 50 | static bool raw_samples = false; |
| 51 | static bool system_wide = false; |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 52 | static int profile_cpu = -1; |
| 53 | static pid_t target_pid = -1; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 54 | static pid_t target_tid = -1; |
| 55 | static pid_t *all_tids = NULL; |
| 56 | static int thread_num = 0; |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 57 | static pid_t child_pid = -1; |
Stephane Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 58 | static bool no_inherit = false; |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 59 | static enum write_mode_t write_mode = WRITE_FORCE; |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 60 | static bool call_graph = false; |
| 61 | static bool inherit_stat = false; |
| 62 | static bool no_samples = false; |
| 63 | static bool sample_address = false; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 64 | |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 65 | static long samples = 0; |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 66 | static u64 bytes_written = 0; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 67 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 68 | static struct pollfd *event_array; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 69 | |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 70 | static int nr_poll = 0; |
| 71 | static int nr_cpu = 0; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 72 | |
Ingo Molnar | 42e59d7 | 2009-10-06 15:14:21 +0200 | [diff] [blame] | 73 | static int file_new = 1; |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 74 | static off_t post_processing_offset; |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 75 | |
Arnaldo Carvalho de Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 76 | static struct perf_session *session; |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 77 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 78 | struct mmap_data { |
| 79 | int counter; |
| 80 | void *base; |
| 81 | unsigned int mask; |
| 82 | unsigned int prev; |
| 83 | }; |
| 84 | |
Peter Zijlstra | 0e2e63d | 2010-05-20 14:45:26 +0200 | [diff] [blame] | 85 | static struct mmap_data mmap_array[MAX_NR_CPUS]; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 86 | |
Peter Zijlstra | 9d91a6f | 2009-06-18 11:40:28 +0200 | [diff] [blame] | 87 | static unsigned long mmap_read_head(struct mmap_data *md) |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 88 | { |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 89 | struct perf_event_mmap_page *pc = md->base; |
Peter Zijlstra | 9d91a6f | 2009-06-18 11:40:28 +0200 | [diff] [blame] | 90 | long head; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 91 | |
| 92 | head = pc->data_head; |
| 93 | rmb(); |
| 94 | |
| 95 | return head; |
| 96 | } |
| 97 | |
Peter Zijlstra | 9d91a6f | 2009-06-18 11:40:28 +0200 | [diff] [blame] | 98 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
| 99 | { |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 100 | struct perf_event_mmap_page *pc = md->base; |
Peter Zijlstra | 9d91a6f | 2009-06-18 11:40:28 +0200 | [diff] [blame] | 101 | |
| 102 | /* |
| 103 | * ensure all reads are done before we write the tail out. |
| 104 | */ |
| 105 | /* mb(); */ |
| 106 | pc->data_tail = tail; |
| 107 | } |
| 108 | |
Tom Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame] | 109 | static void advance_output(size_t size) |
| 110 | { |
| 111 | bytes_written += size; |
| 112 | } |
| 113 | |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 114 | static 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 Melo | d8f6624 | 2009-12-13 19:50:24 -0200 | [diff] [blame] | 129 | static int process_synthesized_event(event_t *event, |
| 130 | struct perf_session *self __used) |
Arnaldo Carvalho de Melo | 234fbbf | 2009-10-26 19:23:18 -0200 | [diff] [blame] | 131 | { |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 132 | write_output(event, event->header.size); |
Arnaldo Carvalho de Melo | 234fbbf | 2009-10-26 19:23:18 -0200 | [diff] [blame] | 133 | return 0; |
| 134 | } |
| 135 | |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 136 | static 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 Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 145 | /* |
| 146 | * If we're further behind than half the buffer, there's a chance |
Ingo Molnar | 2debbc8 | 2009-06-05 14:29:10 +0200 | [diff] [blame] | 147 | * the writer will bite our tail and mess up the samples under us. |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 148 | * |
| 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 Zijlstra | 9d91a6f | 2009-06-18 11:40:28 +0200 | [diff] [blame] | 154 | if (diff < 0) { |
Russ Anderson | ef365ce | 2010-05-18 17:52:40 -0500 | [diff] [blame] | 155 | fprintf(stderr, "WARNING: failed to keep up with mmap data\n"); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 156 | /* |
| 157 | * head points to a known good entry, start there. |
| 158 | */ |
| 159 | old = head; |
| 160 | } |
| 161 | |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 162 | if (old != head) |
Ingo Molnar | 2debbc8 | 2009-06-05 14:29:10 +0200 | [diff] [blame] | 163 | samples++; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 164 | |
| 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 Molnar | 021e9f4 | 2009-06-03 19:27:19 +0200 | [diff] [blame] | 171 | |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 172 | write_output(buf, size); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | buf = &data[old & md->mask]; |
| 176 | size = head - old; |
| 177 | old += size; |
Ingo Molnar | 021e9f4 | 2009-06-03 19:27:19 +0200 | [diff] [blame] | 178 | |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 179 | write_output(buf, size); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 180 | |
| 181 | md->prev = old; |
Peter Zijlstra | 9d91a6f | 2009-06-18 11:40:28 +0200 | [diff] [blame] | 182 | mmap_write_tail(md, old); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | static volatile int done = 0; |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 186 | static volatile int signr = -1; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 187 | |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 188 | static void sig_handler(int sig) |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 189 | { |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 190 | done = 1; |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 191 | signr = sig; |
| 192 | } |
| 193 | |
| 194 | static void sig_atexit(void) |
| 195 | { |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 196 | if (child_pid != -1) |
| 197 | kill(child_pid, SIGTERM); |
| 198 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 199 | if (signr == -1) |
| 200 | return; |
| 201 | |
| 202 | signal(signr, SIG_DFL); |
| 203 | kill(getpid(), signr); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 204 | } |
| 205 | |
Ingo Molnar | f250c030 | 2009-06-05 13:18:41 +0200 | [diff] [blame] | 206 | static int group_fd; |
| 207 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 208 | static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr) |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 209 | { |
| 210 | struct perf_header_attr *h_attr; |
| 211 | |
Arnaldo Carvalho de Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 212 | if (nr < session->header.attrs) { |
| 213 | h_attr = session->header.attr[nr]; |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 214 | } else { |
| 215 | h_attr = perf_header_attr__new(a); |
Arnaldo Carvalho de Melo | dc79c0f | 2009-11-16 19:30:26 -0200 | [diff] [blame] | 216 | if (h_attr != NULL) |
Arnaldo Carvalho de Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 217 | if (perf_header__add_attr(&session->header, h_attr) < 0) { |
Arnaldo Carvalho de Melo | 11deb1f | 2009-11-17 01:18:09 -0200 | [diff] [blame] | 218 | perf_header_attr__delete(h_attr); |
| 219 | h_attr = NULL; |
| 220 | } |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | return h_attr; |
| 224 | } |
| 225 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 226 | static void create_counter(int counter, int cpu) |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 227 | { |
Li Zefan | c171b55 | 2009-10-15 11:22:07 +0800 | [diff] [blame] | 228 | char *filter = filters[counter]; |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 229 | struct perf_event_attr *attr = attrs + counter; |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 230 | struct perf_header_attr *h_attr; |
| 231 | int track = !counter; /* only the first counter needs these */ |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 232 | int thread_index; |
Li Zefan | c171b55 | 2009-10-15 11:22:07 +0800 | [diff] [blame] | 233 | int ret; |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 234 | 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 Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 244 | |
Frederic Weisbecker | 3a9f131 | 2009-08-13 10:27:18 +0200 | [diff] [blame] | 245 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
Ingo Molnar | 3efa1cc9 | 2009-06-14 15:04:15 +0200 | [diff] [blame] | 246 | |
Eric B Munson | 8907fd6 | 2010-03-05 12:51:05 -0300 | [diff] [blame] | 247 | if (nr_counters > 1) |
| 248 | attr->sample_type |= PERF_SAMPLE_ID; |
| 249 | |
Frederic Weisbecker | f921281 | 2010-04-14 22:09:02 +0200 | [diff] [blame] | 250 | /* |
| 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 Eranian | 3de29ca | 2010-05-17 12:20:43 -0300 | [diff] [blame] | 255 | user_interval != ULLONG_MAX)) { |
Frederic Weisbecker | f921281 | 2010-04-14 22:09:02 +0200 | [diff] [blame] | 256 | 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 Molnar | 1dba15e | 2009-06-05 18:37:22 +0200 | [diff] [blame] | 263 | } |
Ingo Molnar | 3efa1cc9 | 2009-06-14 15:04:15 +0200 | [diff] [blame] | 264 | |
Peter Zijlstra | 649c48a | 2009-06-24 21:12:48 +0200 | [diff] [blame] | 265 | if (no_samples) |
| 266 | attr->sample_freq = 0; |
| 267 | |
| 268 | if (inherit_stat) |
| 269 | attr->inherit_stat = 1; |
| 270 | |
Anton Blanchard | 4bba828 | 2009-07-16 15:44:29 +0200 | [diff] [blame] | 271 | if (sample_address) |
| 272 | attr->sample_type |= PERF_SAMPLE_ADDR; |
| 273 | |
Ingo Molnar | 3efa1cc9 | 2009-06-14 15:04:15 +0200 | [diff] [blame] | 274 | if (call_graph) |
| 275 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; |
| 276 | |
Ingo Molnar | cd6feee | 2009-09-02 20:20:38 +0200 | [diff] [blame] | 277 | if (raw_samples) { |
Ingo Molnar | 6ddf259 | 2009-09-03 12:00:22 +0200 | [diff] [blame] | 278 | attr->sample_type |= PERF_SAMPLE_TIME; |
Frederic Weisbecker | daac07b | 2009-08-13 10:27:19 +0200 | [diff] [blame] | 279 | attr->sample_type |= PERF_SAMPLE_RAW; |
Ingo Molnar | cd6feee | 2009-09-02 20:20:38 +0200 | [diff] [blame] | 280 | attr->sample_type |= PERF_SAMPLE_CPU; |
| 281 | } |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 282 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 283 | attr->mmap = track; |
| 284 | attr->comm = track; |
Stephane Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 285 | attr->inherit = !no_inherit; |
| 286 | if (target_pid == -1 && target_tid == -1 && !system_wide) { |
Zhang, Yanmin | 46be604 | 2010-03-18 11:36:04 -0300 | [diff] [blame] | 287 | attr->disabled = 1; |
Eric B Munson | bedbfde | 2010-03-15 11:46:57 -0300 | [diff] [blame] | 288 | attr->enable_on_exec = 1; |
Zhang, Yanmin | 46be604 | 2010-03-18 11:36:04 -0300 | [diff] [blame] | 289 | } |
Eric B Munson | bedbfde | 2010-03-15 11:46:57 -0300 | [diff] [blame] | 290 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 291 | for (thread_index = 0; thread_index < thread_num; thread_index++) { |
Ingo Molnar | 3da297a | 2009-06-07 17:39:02 +0200 | [diff] [blame] | 292 | try_again: |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 293 | fd[nr_cpu][counter][thread_index] = sys_perf_event_open(attr, |
| 294 | all_tids[thread_index], cpu, group_fd, 0); |
Ingo Molnar | f250c030 | 2009-06-05 13:18:41 +0200 | [diff] [blame] | 295 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 296 | if (fd[nr_cpu][counter][thread_index] < 0) { |
| 297 | int err = errno; |
Ingo Molnar | f250c030 | 2009-06-05 13:18:41 +0200 | [diff] [blame] | 298 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 299 | 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 Molnar | 3da297a | 2009-06-07 17:39:02 +0200 | [diff] [blame] | 307 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 308 | /* |
| 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 Molnar | 3da297a | 2009-06-07 17:39:02 +0200 | [diff] [blame] | 315 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 316 | 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 Kaempflein | bfd4511 | 2009-11-16 15:25:53 +1000 | [diff] [blame] | 325 | |
| 326 | #if defined(__i386__) || defined(__x86_64__) |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 327 | 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 Kaempflein | bfd4511 | 2009-11-16 15:25:53 +1000 | [diff] [blame] | 332 | #endif |
| 333 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 334 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 335 | exit(-1); |
| 336 | } |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 337 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 338 | h_attr = get_header_attr(attr, counter); |
| 339 | if (h_attr == NULL) |
| 340 | die("nomem\n"); |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 341 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 342 | if (!file_new) { |
| 343 | if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { |
| 344 | fprintf(stderr, "incompatible append\n"); |
| 345 | exit(-1); |
| 346 | } |
| 347 | } |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 348 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 349 | if (read(fd[nr_cpu][counter][thread_index], &read_data, sizeof(read_data)) == -1) { |
| 350 | perror("Unable to read perf file descriptor\n"); |
Ingo Molnar | ea57c4f | 2009-09-13 18:15:54 +0200 | [diff] [blame] | 351 | exit(-1); |
| 352 | } |
Peter Zijlstra | 4502d77 | 2009-06-10 15:03:06 +0200 | [diff] [blame] | 353 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 354 | if (perf_header_attr__add_id(h_attr, read_data.id) < 0) { |
| 355 | pr_warning("Not enough memory to add id\n"); |
Li Zefan | c171b55 | 2009-10-15 11:22:07 +0800 | [diff] [blame] | 356 | exit(-1); |
| 357 | } |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 358 | |
| 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, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 367 | |
Peter Zijlstra | 0e2e63d | 2010-05-20 14:45:26 +0200 | [diff] [blame] | 368 | 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, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 387 | |
Peter Zijlstra | 0e2e63d | 2010-05-20 14:45:26 +0200 | [diff] [blame] | 388 | event_array[nr_poll].fd = fd[nr_cpu][counter][thread_index]; |
| 389 | event_array[nr_poll].events = POLLIN; |
| 390 | nr_poll++; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 391 | } |
| 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 Zefan | c171b55 | 2009-10-15 11:22:07 +0800 | [diff] [blame] | 402 | } |
Ingo Molnar | f250c030 | 2009-06-05 13:18:41 +0200 | [diff] [blame] | 403 | } |
| 404 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 405 | static void open_counters(int cpu) |
Ingo Molnar | f250c030 | 2009-06-05 13:18:41 +0200 | [diff] [blame] | 406 | { |
| 407 | int counter; |
| 408 | |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 409 | group_fd = -1; |
Ingo Molnar | f250c030 | 2009-06-05 13:18:41 +0200 | [diff] [blame] | 410 | for (counter = 0; counter < nr_counters; counter++) |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 411 | create_counter(counter, cpu); |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 412 | |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 413 | nr_cpu++; |
| 414 | } |
| 415 | |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 416 | static int process_buildids(void) |
| 417 | { |
| 418 | u64 size = lseek(output, 0, SEEK_CUR); |
| 419 | |
Arnaldo Carvalho de Melo | 9f591fd | 2010-03-11 15:53:11 -0300 | [diff] [blame] | 420 | if (size == 0) |
| 421 | return 0; |
| 422 | |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 423 | 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 Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 429 | static void atexit_header(void) |
| 430 | { |
Tom Zanussi | c7929e4 | 2010-04-01 23:59:22 -0500 | [diff] [blame] | 431 | if (!pipe_output) { |
| 432 | session->header.data_size += bytes_written; |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 433 | |
Tom Zanussi | c7929e4 | 2010-04-01 23:59:22 -0500 | [diff] [blame] | 434 | process_buildids(); |
| 435 | perf_header__write(&session->header, output, true); |
Tom Zanussi | c7929e4 | 2010-04-01 23:59:22 -0500 | [diff] [blame] | 436 | } |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 437 | } |
| 438 | |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 439 | static void event__synthesize_guest_os(struct machine *machine, void *data) |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 440 | { |
| 441 | int err; |
| 442 | char *guest_kallsyms; |
| 443 | char path[PATH_MAX]; |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 444 | struct perf_session *psession = data; |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 445 | |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 446 | if (machine__is_host(machine)) |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 447 | 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 Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 458 | psession, machine); |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 459 | if (err < 0) |
| 460 | pr_err("Couldn't record guest kernel [%d]'s reference" |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 461 | " relocation symbol.\n", machine->pid); |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 462 | |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 463 | if (machine__is_default_guest(machine)) |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 464 | guest_kallsyms = (char *) symbol_conf.default_guest_kallsyms; |
| 465 | else { |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 466 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 467 | 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 Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 475 | psession, machine, "_text"); |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 476 | if (err < 0) |
| 477 | err = event__synthesize_kernel_mmap(process_synthesized_event, |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 478 | psession, machine, "_stext"); |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 479 | if (err < 0) |
| 480 | pr_err("Couldn't record guest kernel [%d]'s reference" |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 481 | " relocation symbol.\n", machine->pid); |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 482 | } |
| 483 | |
Frederic Weisbecker | 9840280 | 2010-05-02 22:05:29 +0200 | [diff] [blame] | 484 | static struct perf_event_header finished_round_event = { |
| 485 | .size = sizeof(struct perf_event_header), |
| 486 | .type = PERF_RECORD_FINISHED_ROUND, |
| 487 | }; |
| 488 | |
| 489 | static void mmap_read_all(void) |
| 490 | { |
Peter Zijlstra | 0e2e63d | 2010-05-20 14:45:26 +0200 | [diff] [blame] | 491 | int i; |
Frederic Weisbecker | 9840280 | 2010-05-02 22:05:29 +0200 | [diff] [blame] | 492 | |
| 493 | for (i = 0; i < nr_cpu; i++) { |
Peter Zijlstra | 0e2e63d | 2010-05-20 14:45:26 +0200 | [diff] [blame] | 494 | if (mmap_array[i].base) |
| 495 | mmap_read(&mmap_array[i]); |
Frederic Weisbecker | 9840280 | 2010-05-02 22:05:29 +0200 | [diff] [blame] | 496 | } |
| 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 Melo | d4db3f1 | 2009-12-27 21:36:57 -0200 | [diff] [blame] | 502 | static int __cmd_record(int argc, const char **argv) |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 503 | { |
| 504 | int i, counter; |
Peter Zijlstra | 97124d5 | 2009-06-02 15:52:24 +0200 | [diff] [blame] | 505 | struct stat st; |
Ingo Molnar | abaff32 | 2009-06-02 22:59:57 +0200 | [diff] [blame] | 506 | int flags; |
Arnaldo Carvalho de Melo | 4dc0a04 | 2009-11-19 14:55:55 -0200 | [diff] [blame] | 507 | int err; |
Peter Zijlstra | 8b41266 | 2009-09-17 19:59:05 +0200 | [diff] [blame] | 508 | unsigned long waking = 0; |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 509 | int child_ready_pipe[2], go_pipe[2]; |
Zhang, Yanmin | 46be604 | 2010-03-18 11:36:04 -0300 | [diff] [blame] | 510 | const bool forks = argc > 0; |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 511 | char buf; |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 512 | struct machine *machine; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 513 | |
| 514 | page_size = sysconf(_SC_PAGE_SIZE); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 515 | |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 516 | atexit(sig_atexit); |
| 517 | signal(SIGCHLD, sig_handler); |
| 518 | signal(SIGINT, sig_handler); |
| 519 | |
Arnaldo Carvalho de Melo | d4db3f1 | 2009-12-27 21:36:57 -0200 | [diff] [blame] | 520 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 521 | perror("failed to create pipes"); |
| 522 | exit(-1); |
| 523 | } |
| 524 | |
Tom Zanussi | 529870e | 2010-04-01 23:59:16 -0500 | [diff] [blame] | 525 | if (!strcmp(output_name, "-")) |
| 526 | pipe_output = 1; |
| 527 | else if (!stat(output_name, &st) && st.st_size) { |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 528 | if (write_mode == WRITE_FORCE) { |
Arnaldo Carvalho de Melo | b38d346 | 2009-12-14 20:09:30 -0200 | [diff] [blame] | 529 | char oldname[PATH_MAX]; |
| 530 | snprintf(oldname, sizeof(oldname), "%s.old", |
| 531 | output_name); |
| 532 | unlink(oldname); |
| 533 | rename(output_name, oldname); |
Pierre Habouzit | 266e0e2 | 2009-08-07 14:16:01 +0200 | [diff] [blame] | 534 | } |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 535 | } else if (write_mode == WRITE_APPEND) { |
| 536 | write_mode = WRITE_FORCE; |
Peter Zijlstra | 97124d5 | 2009-06-02 15:52:24 +0200 | [diff] [blame] | 537 | } |
| 538 | |
Xiao Guangrong | f887f30 | 2010-02-04 16:46:42 +0800 | [diff] [blame] | 539 | flags = O_CREAT|O_RDWR; |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 540 | if (write_mode == WRITE_APPEND) |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 541 | file_new = 0; |
Ingo Molnar | abaff32 | 2009-06-02 22:59:57 +0200 | [diff] [blame] | 542 | else |
| 543 | flags |= O_TRUNC; |
| 544 | |
Tom Zanussi | 529870e | 2010-04-01 23:59:16 -0500 | [diff] [blame] | 545 | if (pipe_output) |
| 546 | output = STDOUT_FILENO; |
| 547 | else |
| 548 | output = open(output_name, flags, S_IRUSR | S_IWUSR); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 549 | if (output < 0) { |
| 550 | perror("failed to create output file"); |
| 551 | exit(-1); |
| 552 | } |
| 553 | |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 554 | session = perf_session__new(output_name, O_WRONLY, |
Tom Zanussi | 454c407 | 2010-05-01 01:41:20 -0500 | [diff] [blame] | 555 | write_mode == WRITE_FORCE, false); |
Arnaldo Carvalho de Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 556 | if (session == NULL) { |
Arnaldo Carvalho de Melo | a9a70bb | 2009-11-17 01:18:11 -0200 | [diff] [blame] | 557 | pr_err("Not enough memory for reading perf file header\n"); |
| 558 | return -1; |
| 559 | } |
| 560 | |
Arnaldo Carvalho de Melo | 4dc0a04 | 2009-11-19 14:55:55 -0200 | [diff] [blame] | 561 | if (!file_new) { |
Tom Zanussi | 8dc5810 | 2010-04-01 23:59:15 -0500 | [diff] [blame] | 562 | err = perf_header__read(session, output); |
Arnaldo Carvalho de Melo | 4dc0a04 | 2009-11-19 14:55:55 -0200 | [diff] [blame] | 563 | if (err < 0) |
| 564 | return err; |
| 565 | } |
| 566 | |
Tom Zanussi | db620b1 | 2010-05-04 22:20:16 -0500 | [diff] [blame] | 567 | if (have_tracepoints(attrs, nr_counters)) |
Arnaldo Carvalho de Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 568 | perf_header__set_feat(&session->header, HEADER_TRACE_INFO); |
Frederic Weisbecker | 03456a1 | 2009-10-06 23:36:47 +0200 | [diff] [blame] | 569 | |
Peter Zijlstra | f597055 | 2009-06-18 23:22:55 +0200 | [diff] [blame] | 570 | atexit(atexit_header); |
| 571 | |
Arnaldo Carvalho de Melo | d4db3f1 | 2009-12-27 21:36:57 -0200 | [diff] [blame] | 572 | if (forks) { |
Zhang, Yanmin | 46be604 | 2010-03-18 11:36:04 -0300 | [diff] [blame] | 573 | child_pid = fork(); |
Borislav Petkov | 2fb750e | 2010-05-31 23:18:18 +0200 | [diff] [blame] | 574 | if (child_pid < 0) { |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 575 | perror("failed to fork"); |
| 576 | exit(-1); |
Jens Axboe | 0a5ac84 | 2009-08-12 11:18:01 +0200 | [diff] [blame] | 577 | } |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 578 | |
Zhang, Yanmin | 46be604 | 2010-03-18 11:36:04 -0300 | [diff] [blame] | 579 | if (!child_pid) { |
Tom Zanussi | 529870e | 2010-04-01 23:59:16 -0500 | [diff] [blame] | 580 | if (pipe_output) |
| 581 | dup2(2, 1); |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 582 | 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, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 610 | if (!system_wide && target_tid == -1 && target_pid == -1) |
| 611 | all_tids[0] = child_pid; |
| 612 | |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 613 | 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 Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 625 | if ((!system_wide && no_inherit) || profile_cpu != -1) { |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 626 | open_counters(profile_cpu); |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 627 | } else { |
Paul Mackerras | a12b51c | 2010-03-10 20:36:09 +1100 | [diff] [blame] | 628 | nr_cpus = read_cpu_map(); |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 629 | for (i = 0; i < nr_cpus; i++) |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 630 | open_counters(cpumap[i]); |
Jens Axboe | 0a5ac84 | 2009-08-12 11:18:01 +0200 | [diff] [blame] | 631 | } |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 632 | |
Tom Zanussi | 529870e | 2010-04-01 23:59:16 -0500 | [diff] [blame] | 633 | 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 Melo | 94c744b | 2009-12-11 21:24:02 -0200 | [diff] [blame] | 638 | err = perf_header__write(&session->header, output, false); |
Arnaldo Carvalho de Melo | d5eed90 | 2009-11-19 14:55:56 -0200 | [diff] [blame] | 639 | if (err < 0) |
| 640 | return err; |
| 641 | } |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 642 | |
Arnaldo Carvalho de Melo | 6122e4e | 2010-02-03 16:52:05 -0200 | [diff] [blame] | 643 | post_processing_offset = lseek(output, 0, SEEK_CUR); |
| 644 | |
Tom Zanussi | 2c46dbb | 2010-04-01 23:59:19 -0500 | [diff] [blame] | 645 | 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 Zanussi | cd19a03 | 2010-04-01 23:59:20 -0500 | [diff] [blame] | 653 | |
| 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 Zanussi | 9215545 | 2010-04-01 23:59:21 -0500 | [diff] [blame] | 660 | |
Tom Zanussi | 63e0c77 | 2010-05-03 00:14:48 -0500 | [diff] [blame] | 661 | 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 Melo | 2c9faa0 | 2010-05-02 13:37:24 -0300 | [diff] [blame] | 678 | advance_output(err); |
Tom Zanussi | 63e0c77 | 2010-05-03 00:14:48 -0500 | [diff] [blame] | 679 | } |
Tom Zanussi | 2c46dbb | 2010-04-01 23:59:19 -0500 | [diff] [blame] | 680 | } |
| 681 | |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 682 | machine = perf_session__find_host_machine(session); |
| 683 | if (!machine) { |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 684 | pr_err("Couldn't find native kernel information.\n"); |
| 685 | return -1; |
| 686 | } |
| 687 | |
Arnaldo Carvalho de Melo | 56b03f3 | 2010-01-05 16:50:31 -0200 | [diff] [blame] | 688 | err = event__synthesize_kernel_mmap(process_synthesized_event, |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 689 | session, machine, "_text"); |
Arnaldo Carvalho de Melo | 7016213 | 2010-03-30 18:27:39 -0300 | [diff] [blame] | 690 | if (err < 0) |
| 691 | err = event__synthesize_kernel_mmap(process_synthesized_event, |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 692 | session, machine, "_stext"); |
Arnaldo Carvalho de Melo | 56b03f3 | 2010-01-05 16:50:31 -0200 | [diff] [blame] | 693 | if (err < 0) { |
| 694 | pr_err("Couldn't record kernel reference relocation symbol.\n"); |
| 695 | return err; |
| 696 | } |
| 697 | |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 698 | err = event__synthesize_modules(process_synthesized_event, |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 699 | session, machine); |
Arnaldo Carvalho de Melo | b7cece7 | 2010-01-13 13:22:17 -0200 | [diff] [blame] | 700 | if (err < 0) { |
| 701 | pr_err("Couldn't record kernel reference relocation symbol.\n"); |
| 702 | return err; |
| 703 | } |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 704 | if (perf_guest) |
Arnaldo Carvalho de Melo | 23346f2 | 2010-04-27 21:17:50 -0300 | [diff] [blame] | 705 | perf_session__process_machines(session, event__synthesize_guest_os); |
Arnaldo Carvalho de Melo | b7cece7 | 2010-01-13 13:22:17 -0200 | [diff] [blame] | 706 | |
Arnaldo Carvalho de Melo | d4db3f1 | 2009-12-27 21:36:57 -0200 | [diff] [blame] | 707 | if (!system_wide && profile_cpu == -1) |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 708 | event__synthesize_thread(target_tid, process_synthesized_event, |
Arnaldo Carvalho de Melo | d8f6624 | 2009-12-13 19:50:24 -0200 | [diff] [blame] | 709 | session); |
Arnaldo Carvalho de Melo | 234fbbf | 2009-10-26 19:23:18 -0200 | [diff] [blame] | 710 | else |
Arnaldo Carvalho de Melo | d8f6624 | 2009-12-13 19:50:24 -0200 | [diff] [blame] | 711 | event__synthesize_threads(process_synthesized_event, session); |
Peter Zijlstra | 7c6a1c6 | 2009-06-25 17:05:54 +0200 | [diff] [blame] | 712 | |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 713 | if (realtime_prio) { |
| 714 | struct sched_param param; |
| 715 | |
| 716 | param.sched_priority = realtime_prio; |
| 717 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
Arnaldo Carvalho de Melo | 6beba7a | 2009-10-21 17:34:06 -0200 | [diff] [blame] | 718 | pr_err("Could not set realtime priority.\n"); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 719 | exit(-1); |
| 720 | } |
| 721 | } |
| 722 | |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 723 | /* |
| 724 | * Let the child rip |
| 725 | */ |
Arnaldo Carvalho de Melo | d4db3f1 | 2009-12-27 21:36:57 -0200 | [diff] [blame] | 726 | if (forks) |
| 727 | close(go_pipe[1]); |
Peter Zijlstra | 856e966 | 2009-12-16 17:55:55 +0100 | [diff] [blame] | 728 | |
Peter Zijlstra | 649c48a | 2009-06-24 21:12:48 +0200 | [diff] [blame] | 729 | for (;;) { |
Ingo Molnar | 2debbc8 | 2009-06-05 14:29:10 +0200 | [diff] [blame] | 730 | int hits = samples; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 731 | int thread; |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 732 | |
Frederic Weisbecker | 9840280 | 2010-05-02 22:05:29 +0200 | [diff] [blame] | 733 | mmap_read_all(); |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 734 | |
Peter Zijlstra | 649c48a | 2009-06-24 21:12:48 +0200 | [diff] [blame] | 735 | if (hits == samples) { |
| 736 | if (done) |
| 737 | break; |
Arnaldo Carvalho de Melo | 4dc0a04 | 2009-11-19 14:55:55 -0200 | [diff] [blame] | 738 | err = poll(event_array, nr_poll, -1); |
Peter Zijlstra | 8b41266 | 2009-09-17 19:59:05 +0200 | [diff] [blame] | 739 | waking++; |
| 740 | } |
| 741 | |
| 742 | if (done) { |
| 743 | for (i = 0; i < nr_cpu; i++) { |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 744 | 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 Zijlstra | 8b41266 | 2009-09-17 19:59:05 +0200 | [diff] [blame] | 753 | } |
Peter Zijlstra | 649c48a | 2009-06-24 21:12:48 +0200 | [diff] [blame] | 754 | } |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 755 | } |
| 756 | |
Peter Zijlstra | 8b41266 | 2009-09-17 19:59:05 +0200 | [diff] [blame] | 757 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
| 758 | |
Ingo Molnar | 021e9f4 | 2009-06-03 19:27:19 +0200 | [diff] [blame] | 759 | /* |
| 760 | * Approximate RIP event size: 24 bytes. |
| 761 | */ |
| 762 | fprintf(stderr, |
Ingo Molnar | 2debbc8 | 2009-06-05 14:29:10 +0200 | [diff] [blame] | 763 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
Ingo Molnar | 021e9f4 | 2009-06-03 19:27:19 +0200 | [diff] [blame] | 764 | (double)bytes_written / 1024.0 / 1024.0, |
| 765 | output_name, |
| 766 | bytes_written / 24); |
Ingo Molnar | addc278 | 2009-06-02 23:43:11 +0200 | [diff] [blame] | 767 | |
Peter Zijlstra | de9ac07 | 2009-04-08 15:01:31 +0200 | [diff] [blame] | 768 | return 0; |
| 769 | } |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 770 | |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 771 | static const char * const record_usage[] = { |
Mike Galbraith | 9e09675 | 2009-05-28 16:25:34 +0200 | [diff] [blame] | 772 | "perf record [<options>] [<command>]", |
| 773 | "perf record [<options>] -- <command> [<options>]", |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 774 | NULL |
| 775 | }; |
| 776 | |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 777 | static bool force, append_file; |
| 778 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 779 | static const struct option options[] = { |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 780 | OPT_CALLBACK('e', "event", NULL, "event", |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 781 | "event selector. use 'perf list' to list available events", |
| 782 | parse_events), |
Li Zefan | c171b55 | 2009-10-15 11:22:07 +0800 | [diff] [blame] | 783 | OPT_CALLBACK(0, "filter", NULL, "filter", |
| 784 | "event filter", parse_filter), |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 785 | OPT_INTEGER('p', "pid", &target_pid, |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 786 | "record events on existing process id"), |
| 787 | OPT_INTEGER('t', "tid", &target_tid, |
| 788 | "record events on existing thread id"), |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 789 | OPT_INTEGER('r', "realtime", &realtime_prio, |
| 790 | "collect data with this RT SCHED_FIFO priority"), |
Frederic Weisbecker | daac07b | 2009-08-13 10:27:19 +0200 | [diff] [blame] | 791 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
| 792 | "collect raw sample records from all opened counters"), |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 793 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
| 794 | "system-wide collection from all CPUs"), |
Ingo Molnar | abaff32 | 2009-06-02 22:59:57 +0200 | [diff] [blame] | 795 | OPT_BOOLEAN('A', "append", &append_file, |
| 796 | "append to the output file to do incremental profiling"), |
Jens Axboe | 0a5ac84 | 2009-08-12 11:18:01 +0200 | [diff] [blame] | 797 | OPT_INTEGER('C', "profile_cpu", &profile_cpu, |
| 798 | "CPU to profile on"), |
Peter Zijlstra | 97124d5 | 2009-06-02 15:52:24 +0200 | [diff] [blame] | 799 | OPT_BOOLEAN('f', "force", &force, |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 800 | "overwrite existing data file (deprecated)"), |
Stephane Eranian | 3de29ca | 2010-05-17 12:20:43 -0300 | [diff] [blame] | 801 | OPT_U64('c', "count", &user_interval, "event period to sample"), |
Ingo Molnar | abaff32 | 2009-06-02 22:59:57 +0200 | [diff] [blame] | 802 | OPT_STRING('o', "output", &output_name, "file", |
| 803 | "output file name"), |
Stephane Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 804 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
| 805 | "child tasks do not inherit counters"), |
Arnaldo Carvalho de Melo | 1967936 | 2010-05-17 15:39:16 -0300 | [diff] [blame] | 806 | OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"), |
| 807 | OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"), |
Ingo Molnar | 3efa1cc9 | 2009-06-14 15:04:15 +0200 | [diff] [blame] | 808 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
| 809 | "do call-graph (stack chain/backtrace) recording"), |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 810 | OPT_INCR('v', "verbose", &verbose, |
Ingo Molnar | 3da297a | 2009-06-07 17:39:02 +0200 | [diff] [blame] | 811 | "be more verbose (show counter open errors, etc)"), |
Peter Zijlstra | 649c48a | 2009-06-24 21:12:48 +0200 | [diff] [blame] | 812 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
| 813 | "per thread counts"), |
Anton Blanchard | 4bba828 | 2009-07-16 15:44:29 +0200 | [diff] [blame] | 814 | OPT_BOOLEAN('d', "data", &sample_address, |
| 815 | "Sample addresses"), |
Peter Zijlstra | 649c48a | 2009-06-24 21:12:48 +0200 | [diff] [blame] | 816 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
| 817 | "don't sample"), |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 818 | OPT_END() |
| 819 | }; |
| 820 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 821 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 822 | { |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 823 | int i,j; |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 824 | |
Anton Blanchard | a054123 | 2009-07-22 23:04:12 +1000 | [diff] [blame] | 825 | argc = parse_options(argc, argv, options, record_usage, |
Arnaldo Carvalho de Melo | 655000e | 2009-12-15 20:04:40 -0200 | [diff] [blame] | 826 | PARSE_OPT_STOP_AT_NON_OPTION); |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 827 | if (!argc && target_pid == -1 && target_tid == -1 && |
| 828 | !system_wide && profile_cpu == -1) |
Ingo Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 829 | usage_with_options(record_usage, options); |
| 830 | |
Frederic Weisbecker | 7865e81 | 2010-04-14 19:42:07 +0200 | [diff] [blame] | 831 | 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 Melo | 655000e | 2009-12-15 20:04:40 -0200 | [diff] [blame] | 841 | symbol__init(); |
| 842 | |
Peter Zijlstra | bbd36e5 | 2009-06-11 23:11:50 +0200 | [diff] [blame] | 843 | 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 Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 848 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 849 | 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 Zijlstra | 0e2e63d | 2010-05-20 14:45:26 +0200 | [diff] [blame] | 869 | if (!fd[i][j]) |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 870 | 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 Eranian | 3de29ca | 2010-05-17 12:20:43 -0300 | [diff] [blame] | 878 | if (user_interval != ULLONG_MAX) |
Frederic Weisbecker | f921281 | 2010-04-14 22:09:02 +0200 | [diff] [blame] | 879 | default_interval = user_interval; |
| 880 | if (user_freq != UINT_MAX) |
| 881 | freq = user_freq; |
| 882 | |
Mike Galbraith | 7e4ff9e | 2009-10-12 07:56:03 +0200 | [diff] [blame] | 883 | /* |
| 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 Molnar | 0e9b20b | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 895 | return __cmd_record(argc, argv); |
| 896 | } |