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Commit | Line | Data |
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ddcacfa0 | 1 | /* |
bf9e1876 IM |
2 | * builtin-stat.c |
3 | * | |
4 | * Builtin stat command: Give a precise performance counters summary | |
5 | * overview about any workload, CPU or specific PID. | |
6 | * | |
7 | * Sample output: | |
ddcacfa0 | 8 | |
bf9e1876 IM |
9 | $ perf stat ~/hackbench 10 |
10 | Time: 0.104 | |
ddcacfa0 | 11 | |
bf9e1876 | 12 | Performance counter stats for '/home/mingo/hackbench': |
ddcacfa0 | 13 | |
bf9e1876 IM |
14 | 1255.538611 task clock ticks # 10.143 CPU utilization factor |
15 | 54011 context switches # 0.043 M/sec | |
16 | 385 CPU migrations # 0.000 M/sec | |
17 | 17755 pagefaults # 0.014 M/sec | |
18 | 3808323185 CPU cycles # 3033.219 M/sec | |
19 | 1575111190 instructions # 1254.530 M/sec | |
20 | 17367895 cache references # 13.833 M/sec | |
21 | 7674421 cache misses # 6.112 M/sec | |
ddcacfa0 | 22 | |
bf9e1876 | 23 | Wall-clock time elapsed: 123.786620 msecs |
ddcacfa0 | 24 | |
5242519b IM |
25 | * |
26 | * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com> | |
27 | * | |
28 | * Improvements and fixes by: | |
29 | * | |
30 | * Arjan van de Ven <arjan@linux.intel.com> | |
31 | * Yanmin Zhang <yanmin.zhang@intel.com> | |
32 | * Wu Fengguang <fengguang.wu@intel.com> | |
33 | * Mike Galbraith <efault@gmx.de> | |
34 | * Paul Mackerras <paulus@samba.org> | |
6e750a8f | 35 | * Jaswinder Singh Rajput <jaswinder@kernel.org> |
5242519b IM |
36 | * |
37 | * Released under the GPL v2. (and only v2, not any later version) | |
ddcacfa0 IM |
38 | */ |
39 | ||
1a482f38 | 40 | #include "perf.h" |
16f762a2 | 41 | #include "builtin.h" |
148be2c1 | 42 | #include "util/util.h" |
5242519b IM |
43 | #include "util/parse-options.h" |
44 | #include "util/parse-events.h" | |
8f28827a | 45 | #include "util/event.h" |
361c99a6 | 46 | #include "util/evlist.h" |
69aad6f1 | 47 | #include "util/evsel.h" |
8f28827a | 48 | #include "util/debug.h" |
60666c63 | 49 | #include "util/header.h" |
a12b51c4 | 50 | #include "util/cpumap.h" |
d6d901c2 | 51 | #include "util/thread.h" |
fd78260b | 52 | #include "util/thread_map.h" |
ddcacfa0 | 53 | |
ddcacfa0 | 54 | #include <sys/prctl.h> |
42202dd5 | 55 | #include <math.h> |
5af52b51 | 56 | #include <locale.h> |
16c8a109 | 57 | |
d7470b6a SE |
58 | #define DEFAULT_SEPARATOR " " |
59 | ||
cdd6c482 | 60 | static struct perf_event_attr default_attrs[] = { |
ddcacfa0 | 61 | |
56aab464 IM |
62 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
63 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, | |
64 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, | |
65 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, | |
f4dbfa8f | 66 | |
56aab464 IM |
67 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
68 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, | |
56aab464 IM |
69 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, |
70 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, | |
dd86e72a IM |
71 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, |
72 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, | |
f4dbfa8f | 73 | |
ddcacfa0 | 74 | }; |
5242519b | 75 | |
361c99a6 ACM |
76 | struct perf_evlist *evsel_list; |
77 | ||
c0555642 | 78 | static bool system_wide = false; |
3d632595 | 79 | static int run_idx = 0; |
ddcacfa0 | 80 | |
3d632595 | 81 | static int run_count = 1; |
2e6cdf99 | 82 | static bool no_inherit = false; |
c0555642 | 83 | static bool scale = true; |
f5b4a9c3 | 84 | static bool no_aggr = false; |
933da83a | 85 | static pid_t target_pid = -1; |
d6d901c2 | 86 | static pid_t target_tid = -1; |
933da83a | 87 | static pid_t child_pid = -1; |
c0555642 | 88 | static bool null_run = false; |
201e0b06 | 89 | static bool big_num = true; |
d7470b6a | 90 | static int big_num_opt = -1; |
c45c6ea2 | 91 | static const char *cpu_list; |
d7470b6a SE |
92 | static const char *csv_sep = NULL; |
93 | static bool csv_output = false; | |
5af52b51 | 94 | |
60666c63 LW |
95 | static volatile int done = 0; |
96 | ||
506d4bc8 PZ |
97 | struct stats |
98 | { | |
8a02631a | 99 | double n, mean, M2; |
506d4bc8 | 100 | }; |
42202dd5 | 101 | |
69aad6f1 ACM |
102 | struct perf_stat { |
103 | struct stats res_stats[3]; | |
69aad6f1 ACM |
104 | }; |
105 | ||
c52b12ed | 106 | static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel) |
69aad6f1 | 107 | { |
c52b12ed | 108 | evsel->priv = zalloc(sizeof(struct perf_stat)); |
69aad6f1 ACM |
109 | return evsel->priv == NULL ? -ENOMEM : 0; |
110 | } | |
111 | ||
112 | static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) | |
113 | { | |
114 | free(evsel->priv); | |
115 | evsel->priv = NULL; | |
116 | } | |
117 | ||
9e9772c4 PZ |
118 | static void update_stats(struct stats *stats, u64 val) |
119 | { | |
8a02631a | 120 | double delta; |
9e9772c4 | 121 | |
8a02631a PZ |
122 | stats->n++; |
123 | delta = val - stats->mean; | |
124 | stats->mean += delta / stats->n; | |
125 | stats->M2 += delta*(val - stats->mean); | |
9e9772c4 PZ |
126 | } |
127 | ||
506d4bc8 PZ |
128 | static double avg_stats(struct stats *stats) |
129 | { | |
8a02631a | 130 | return stats->mean; |
506d4bc8 | 131 | } |
42202dd5 | 132 | |
506d4bc8 | 133 | /* |
63d40deb PZ |
134 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance |
135 | * | |
8a02631a PZ |
136 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n |
137 | * s^2 = ------------------------------- | |
138 | * n - 1 | |
63d40deb PZ |
139 | * |
140 | * http://en.wikipedia.org/wiki/Stddev | |
141 | * | |
142 | * The std dev of the mean is related to the std dev by: | |
143 | * | |
144 | * s | |
145 | * s_mean = ------- | |
146 | * sqrt(n) | |
147 | * | |
506d4bc8 PZ |
148 | */ |
149 | static double stddev_stats(struct stats *stats) | |
150 | { | |
8a02631a PZ |
151 | double variance = stats->M2 / (stats->n - 1); |
152 | double variance_mean = variance / stats->n; | |
42202dd5 | 153 | |
63d40deb | 154 | return sqrt(variance_mean); |
506d4bc8 | 155 | } |
42202dd5 | 156 | |
f5b4a9c3 SE |
157 | struct stats runtime_nsecs_stats[MAX_NR_CPUS]; |
158 | struct stats runtime_cycles_stats[MAX_NR_CPUS]; | |
159 | struct stats runtime_branches_stats[MAX_NR_CPUS]; | |
506d4bc8 | 160 | struct stats walltime_nsecs_stats; |
be1ac0d8 | 161 | |
48290609 | 162 | static int create_perf_stat_counter(struct perf_evsel *evsel) |
ddcacfa0 | 163 | { |
69aad6f1 | 164 | struct perf_event_attr *attr = &evsel->attr; |
16c8a109 | 165 | |
ddcacfa0 | 166 | if (scale) |
a21ca2ca IM |
167 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
168 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
ddcacfa0 | 169 | |
48290609 | 170 | if (system_wide) |
7e2ed097 | 171 | return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false, false); |
48290609 ACM |
172 | |
173 | attr->inherit = !no_inherit; | |
174 | if (target_pid == -1 && target_tid == -1) { | |
175 | attr->disabled = 1; | |
176 | attr->enable_on_exec = 1; | |
ddcacfa0 | 177 | } |
084ab9f8 | 178 | |
7e2ed097 | 179 | return perf_evsel__open_per_thread(evsel, evsel_list->threads, false, false); |
ddcacfa0 IM |
180 | } |
181 | ||
c04f5e5d IM |
182 | /* |
183 | * Does the counter have nsecs as a unit? | |
184 | */ | |
daec78a0 | 185 | static inline int nsec_counter(struct perf_evsel *evsel) |
c04f5e5d | 186 | { |
daec78a0 ACM |
187 | if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) || |
188 | perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) | |
c04f5e5d IM |
189 | return 1; |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | /* | |
2996f5dd | 195 | * Read out the results of a single counter: |
f5b4a9c3 | 196 | * aggregate counts across CPUs in system-wide mode |
c04f5e5d | 197 | */ |
c52b12ed | 198 | static int read_counter_aggr(struct perf_evsel *counter) |
c04f5e5d | 199 | { |
69aad6f1 | 200 | struct perf_stat *ps = counter->priv; |
c52b12ed ACM |
201 | u64 *count = counter->counts->aggr.values; |
202 | int i; | |
2996f5dd | 203 | |
7e2ed097 ACM |
204 | if (__perf_evsel__read(counter, evsel_list->cpus->nr, |
205 | evsel_list->threads->nr, scale) < 0) | |
c52b12ed | 206 | return -1; |
9e9772c4 PZ |
207 | |
208 | for (i = 0; i < 3; i++) | |
69aad6f1 | 209 | update_stats(&ps->res_stats[i], count[i]); |
9e9772c4 PZ |
210 | |
211 | if (verbose) { | |
9486aa38 ACM |
212 | fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", |
213 | event_name(counter), count[0], count[1], count[2]); | |
9e9772c4 PZ |
214 | } |
215 | ||
be1ac0d8 IM |
216 | /* |
217 | * Save the full runtime - to allow normalization during printout: | |
218 | */ | |
daec78a0 | 219 | if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) |
f5b4a9c3 | 220 | update_stats(&runtime_nsecs_stats[0], count[0]); |
daec78a0 | 221 | if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) |
f5b4a9c3 | 222 | update_stats(&runtime_cycles_stats[0], count[0]); |
daec78a0 | 223 | if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) |
f5b4a9c3 | 224 | update_stats(&runtime_branches_stats[0], count[0]); |
c52b12ed ACM |
225 | |
226 | return 0; | |
f5b4a9c3 SE |
227 | } |
228 | ||
229 | /* | |
230 | * Read out the results of a single counter: | |
231 | * do not aggregate counts across CPUs in system-wide mode | |
232 | */ | |
c52b12ed | 233 | static int read_counter(struct perf_evsel *counter) |
f5b4a9c3 | 234 | { |
c52b12ed | 235 | u64 *count; |
f5b4a9c3 | 236 | int cpu; |
f5b4a9c3 | 237 | |
7e2ed097 | 238 | for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { |
c52b12ed ACM |
239 | if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0) |
240 | return -1; | |
f5b4a9c3 | 241 | |
c52b12ed | 242 | count = counter->counts->cpu[cpu].values; |
f5b4a9c3 | 243 | |
daec78a0 | 244 | if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) |
f5b4a9c3 | 245 | update_stats(&runtime_nsecs_stats[cpu], count[0]); |
daec78a0 | 246 | if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) |
f5b4a9c3 | 247 | update_stats(&runtime_cycles_stats[cpu], count[0]); |
daec78a0 | 248 | if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) |
f5b4a9c3 SE |
249 | update_stats(&runtime_branches_stats[cpu], count[0]); |
250 | } | |
c52b12ed ACM |
251 | |
252 | return 0; | |
2996f5dd IM |
253 | } |
254 | ||
f37a291c | 255 | static int run_perf_stat(int argc __used, const char **argv) |
42202dd5 IM |
256 | { |
257 | unsigned long long t0, t1; | |
69aad6f1 | 258 | struct perf_evsel *counter; |
42202dd5 | 259 | int status = 0; |
051ae7f7 | 260 | int child_ready_pipe[2], go_pipe[2]; |
6be2850e | 261 | const bool forks = (argc > 0); |
051ae7f7 | 262 | char buf; |
42202dd5 | 263 | |
60666c63 | 264 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
051ae7f7 PM |
265 | perror("failed to create pipes"); |
266 | exit(1); | |
267 | } | |
268 | ||
60666c63 | 269 | if (forks) { |
6be2850e | 270 | if ((child_pid = fork()) < 0) |
60666c63 LW |
271 | perror("failed to fork"); |
272 | ||
6be2850e | 273 | if (!child_pid) { |
60666c63 LW |
274 | close(child_ready_pipe[0]); |
275 | close(go_pipe[1]); | |
276 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
277 | ||
278 | /* | |
279 | * Do a dummy execvp to get the PLT entry resolved, | |
280 | * so we avoid the resolver overhead on the real | |
281 | * execvp call. | |
282 | */ | |
283 | execvp("", (char **)argv); | |
284 | ||
285 | /* | |
286 | * Tell the parent we're ready to go | |
287 | */ | |
288 | close(child_ready_pipe[1]); | |
289 | ||
290 | /* | |
291 | * Wait until the parent tells us to go. | |
292 | */ | |
293 | if (read(go_pipe[0], &buf, 1) == -1) | |
294 | perror("unable to read pipe"); | |
295 | ||
296 | execvp(argv[0], (char **)argv); | |
297 | ||
298 | perror(argv[0]); | |
299 | exit(-1); | |
300 | } | |
051ae7f7 | 301 | |
d6d901c2 | 302 | if (target_tid == -1 && target_pid == -1 && !system_wide) |
7e2ed097 | 303 | evsel_list->threads->map[0] = child_pid; |
d6d901c2 | 304 | |
051ae7f7 | 305 | /* |
60666c63 | 306 | * Wait for the child to be ready to exec. |
051ae7f7 PM |
307 | */ |
308 | close(child_ready_pipe[1]); | |
60666c63 LW |
309 | close(go_pipe[0]); |
310 | if (read(child_ready_pipe[0], &buf, 1) == -1) | |
a92bef0f | 311 | perror("unable to read pipe"); |
60666c63 | 312 | close(child_ready_pipe[0]); |
051ae7f7 PM |
313 | } |
314 | ||
361c99a6 | 315 | list_for_each_entry(counter, &evsel_list->entries, node) { |
48290609 ACM |
316 | if (create_perf_stat_counter(counter) < 0) { |
317 | if (errno == -EPERM || errno == -EACCES) { | |
318 | error("You may not have permission to collect %sstats.\n" | |
319 | "\t Consider tweaking" | |
320 | " /proc/sys/kernel/perf_event_paranoid or running as root.", | |
321 | system_wide ? "system-wide " : ""); | |
5a3446bc DA |
322 | } else if (errno == ENOENT) { |
323 | error("%s event is not supported. ", event_name(counter)); | |
48290609 ACM |
324 | } else { |
325 | error("open_counter returned with %d (%s). " | |
326 | "/bin/dmesg may provide additional information.\n", | |
327 | errno, strerror(errno)); | |
328 | } | |
329 | if (child_pid != -1) | |
330 | kill(child_pid, SIGTERM); | |
331 | die("Not all events could be opened.\n"); | |
332 | return -1; | |
333 | } | |
084ab9f8 | 334 | } |
42202dd5 | 335 | |
cfd748ae FW |
336 | if (perf_evlist__set_filters(evsel_list)) { |
337 | error("failed to set filter with %d (%s)\n", errno, | |
338 | strerror(errno)); | |
339 | return -1; | |
340 | } | |
341 | ||
42202dd5 IM |
342 | /* |
343 | * Enable counters and exec the command: | |
344 | */ | |
345 | t0 = rdclock(); | |
42202dd5 | 346 | |
60666c63 LW |
347 | if (forks) { |
348 | close(go_pipe[1]); | |
349 | wait(&status); | |
350 | } else { | |
6be2850e | 351 | while(!done) sleep(1); |
60666c63 | 352 | } |
42202dd5 | 353 | |
42202dd5 IM |
354 | t1 = rdclock(); |
355 | ||
9e9772c4 | 356 | update_stats(&walltime_nsecs_stats, t1 - t0); |
42202dd5 | 357 | |
f5b4a9c3 | 358 | if (no_aggr) { |
361c99a6 | 359 | list_for_each_entry(counter, &evsel_list->entries, node) { |
f5b4a9c3 | 360 | read_counter(counter); |
7e2ed097 | 361 | perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1); |
c52b12ed | 362 | } |
f5b4a9c3 | 363 | } else { |
361c99a6 | 364 | list_for_each_entry(counter, &evsel_list->entries, node) { |
f5b4a9c3 | 365 | read_counter_aggr(counter); |
7e2ed097 ACM |
366 | perf_evsel__close_fd(counter, evsel_list->cpus->nr, |
367 | evsel_list->threads->nr); | |
c52b12ed | 368 | } |
f5b4a9c3 | 369 | } |
c52b12ed | 370 | |
42202dd5 IM |
371 | return WEXITSTATUS(status); |
372 | } | |
373 | ||
69aad6f1 | 374 | static void print_noise(struct perf_evsel *evsel, double avg) |
42202dd5 | 375 | { |
69aad6f1 ACM |
376 | struct perf_stat *ps; |
377 | ||
849abde9 PZ |
378 | if (run_count == 1) |
379 | return; | |
380 | ||
69aad6f1 | 381 | ps = evsel->priv; |
849abde9 | 382 | fprintf(stderr, " ( +- %7.3f%% )", |
69aad6f1 | 383 | 100 * stddev_stats(&ps->res_stats[0]) / avg); |
42202dd5 IM |
384 | } |
385 | ||
daec78a0 | 386 | static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg) |
44175b6f | 387 | { |
506d4bc8 | 388 | double msecs = avg / 1e6; |
d7470b6a SE |
389 | char cpustr[16] = { '\0', }; |
390 | const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s"; | |
44175b6f | 391 | |
f5b4a9c3 | 392 | if (no_aggr) |
d7470b6a SE |
393 | sprintf(cpustr, "CPU%*d%s", |
394 | csv_output ? 0 : -4, | |
7e2ed097 | 395 | evsel_list->cpus->map[cpu], csv_sep); |
d7470b6a | 396 | |
daec78a0 | 397 | fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel)); |
d7470b6a | 398 | |
023695d9 SE |
399 | if (evsel->cgrp) |
400 | fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name); | |
401 | ||
d7470b6a SE |
402 | if (csv_output) |
403 | return; | |
44175b6f | 404 | |
daec78a0 | 405 | if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) |
506d4bc8 PZ |
406 | fprintf(stderr, " # %10.3f CPUs ", |
407 | avg / avg_stats(&walltime_nsecs_stats)); | |
44175b6f IM |
408 | } |
409 | ||
daec78a0 | 410 | static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) |
44175b6f | 411 | { |
c7f7fea3 | 412 | double total, ratio = 0.0; |
f5b4a9c3 | 413 | char cpustr[16] = { '\0', }; |
d7470b6a SE |
414 | const char *fmt; |
415 | ||
416 | if (csv_output) | |
417 | fmt = "%s%.0f%s%s"; | |
418 | else if (big_num) | |
419 | fmt = "%s%'18.0f%s%-24s"; | |
420 | else | |
421 | fmt = "%s%18.0f%s%-24s"; | |
f5b4a9c3 SE |
422 | |
423 | if (no_aggr) | |
d7470b6a SE |
424 | sprintf(cpustr, "CPU%*d%s", |
425 | csv_output ? 0 : -4, | |
7e2ed097 | 426 | evsel_list->cpus->map[cpu], csv_sep); |
f5b4a9c3 SE |
427 | else |
428 | cpu = 0; | |
c7f7fea3 | 429 | |
daec78a0 | 430 | fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel)); |
d7470b6a | 431 | |
023695d9 SE |
432 | if (evsel->cgrp) |
433 | fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name); | |
434 | ||
d7470b6a SE |
435 | if (csv_output) |
436 | return; | |
44175b6f | 437 | |
daec78a0 | 438 | if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { |
f5b4a9c3 | 439 | total = avg_stats(&runtime_cycles_stats[cpu]); |
c7f7fea3 IM |
440 | |
441 | if (total) | |
442 | ratio = avg / total; | |
443 | ||
444 | fprintf(stderr, " # %10.3f IPC ", ratio); | |
daec78a0 | 445 | } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) && |
f5b4a9c3 SE |
446 | runtime_branches_stats[cpu].n != 0) { |
447 | total = avg_stats(&runtime_branches_stats[cpu]); | |
11018201 AB |
448 | |
449 | if (total) | |
450 | ratio = avg * 100 / total; | |
451 | ||
dd86e72a | 452 | fprintf(stderr, " # %10.3f %% ", ratio); |
11018201 | 453 | |
f5b4a9c3 SE |
454 | } else if (runtime_nsecs_stats[cpu].n != 0) { |
455 | total = avg_stats(&runtime_nsecs_stats[cpu]); | |
c7f7fea3 IM |
456 | |
457 | if (total) | |
458 | ratio = 1000.0 * avg / total; | |
459 | ||
460 | fprintf(stderr, " # %10.3f M/sec", ratio); | |
44175b6f | 461 | } |
44175b6f IM |
462 | } |
463 | ||
2996f5dd IM |
464 | /* |
465 | * Print out the results of a single counter: | |
f5b4a9c3 | 466 | * aggregated counts in system-wide mode |
2996f5dd | 467 | */ |
69aad6f1 | 468 | static void print_counter_aggr(struct perf_evsel *counter) |
2996f5dd | 469 | { |
69aad6f1 ACM |
470 | struct perf_stat *ps = counter->priv; |
471 | double avg = avg_stats(&ps->res_stats[0]); | |
c52b12ed | 472 | int scaled = counter->counts->scaled; |
2996f5dd | 473 | |
2996f5dd | 474 | if (scaled == -1) { |
023695d9 | 475 | fprintf(stderr, "%*s%s%*s", |
d7470b6a | 476 | csv_output ? 0 : 18, |
023695d9 SE |
477 | "<not counted>", |
478 | csv_sep, | |
479 | csv_output ? 0 : -24, | |
480 | event_name(counter)); | |
481 | ||
482 | if (counter->cgrp) | |
483 | fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name); | |
484 | ||
485 | fputc('\n', stderr); | |
2996f5dd IM |
486 | return; |
487 | } | |
c04f5e5d | 488 | |
44175b6f | 489 | if (nsec_counter(counter)) |
f5b4a9c3 | 490 | nsec_printout(-1, counter, avg); |
44175b6f | 491 | else |
f5b4a9c3 | 492 | abs_printout(-1, counter, avg); |
849abde9 | 493 | |
d7470b6a SE |
494 | if (csv_output) { |
495 | fputc('\n', stderr); | |
496 | return; | |
497 | } | |
498 | ||
849abde9 | 499 | print_noise(counter, avg); |
506d4bc8 PZ |
500 | |
501 | if (scaled) { | |
502 | double avg_enabled, avg_running; | |
503 | ||
69aad6f1 ACM |
504 | avg_enabled = avg_stats(&ps->res_stats[1]); |
505 | avg_running = avg_stats(&ps->res_stats[2]); | |
d7c29318 | 506 | |
210ad39f | 507 | fprintf(stderr, " (scaled from %.2f%%)", |
506d4bc8 PZ |
508 | 100 * avg_running / avg_enabled); |
509 | } | |
c04f5e5d IM |
510 | fprintf(stderr, "\n"); |
511 | } | |
512 | ||
f5b4a9c3 SE |
513 | /* |
514 | * Print out the results of a single counter: | |
515 | * does not use aggregated count in system-wide | |
516 | */ | |
69aad6f1 | 517 | static void print_counter(struct perf_evsel *counter) |
f5b4a9c3 SE |
518 | { |
519 | u64 ena, run, val; | |
520 | int cpu; | |
521 | ||
7e2ed097 | 522 | for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { |
c52b12ed ACM |
523 | val = counter->counts->cpu[cpu].val; |
524 | ena = counter->counts->cpu[cpu].ena; | |
525 | run = counter->counts->cpu[cpu].run; | |
f5b4a9c3 | 526 | if (run == 0 || ena == 0) { |
023695d9 | 527 | fprintf(stderr, "CPU%*d%s%*s%s%*s", |
d7470b6a | 528 | csv_output ? 0 : -4, |
7e2ed097 | 529 | evsel_list->cpus->map[cpu], csv_sep, |
d7470b6a SE |
530 | csv_output ? 0 : 18, |
531 | "<not counted>", csv_sep, | |
023695d9 | 532 | csv_output ? 0 : -24, |
d7470b6a | 533 | event_name(counter)); |
f5b4a9c3 | 534 | |
023695d9 SE |
535 | if (counter->cgrp) |
536 | fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name); | |
537 | ||
538 | fputc('\n', stderr); | |
f5b4a9c3 SE |
539 | continue; |
540 | } | |
541 | ||
542 | if (nsec_counter(counter)) | |
543 | nsec_printout(cpu, counter, val); | |
544 | else | |
545 | abs_printout(cpu, counter, val); | |
546 | ||
d7470b6a SE |
547 | if (!csv_output) { |
548 | print_noise(counter, 1.0); | |
f5b4a9c3 | 549 | |
d7470b6a SE |
550 | if (run != ena) { |
551 | fprintf(stderr, " (scaled from %.2f%%)", | |
f5b4a9c3 | 552 | 100.0 * run / ena); |
d7470b6a | 553 | } |
f5b4a9c3 | 554 | } |
023695d9 | 555 | fputc('\n', stderr); |
f5b4a9c3 SE |
556 | } |
557 | } | |
558 | ||
42202dd5 IM |
559 | static void print_stat(int argc, const char **argv) |
560 | { | |
69aad6f1 ACM |
561 | struct perf_evsel *counter; |
562 | int i; | |
42202dd5 | 563 | |
ddcacfa0 IM |
564 | fflush(stdout); |
565 | ||
d7470b6a SE |
566 | if (!csv_output) { |
567 | fprintf(stderr, "\n"); | |
568 | fprintf(stderr, " Performance counter stats for "); | |
569 | if(target_pid == -1 && target_tid == -1) { | |
570 | fprintf(stderr, "\'%s", argv[0]); | |
571 | for (i = 1; i < argc; i++) | |
572 | fprintf(stderr, " %s", argv[i]); | |
573 | } else if (target_pid != -1) | |
574 | fprintf(stderr, "process id \'%d", target_pid); | |
575 | else | |
576 | fprintf(stderr, "thread id \'%d", target_tid); | |
44db76c8 | 577 | |
d7470b6a SE |
578 | fprintf(stderr, "\'"); |
579 | if (run_count > 1) | |
580 | fprintf(stderr, " (%d runs)", run_count); | |
581 | fprintf(stderr, ":\n\n"); | |
582 | } | |
2996f5dd | 583 | |
f5b4a9c3 | 584 | if (no_aggr) { |
361c99a6 | 585 | list_for_each_entry(counter, &evsel_list->entries, node) |
f5b4a9c3 SE |
586 | print_counter(counter); |
587 | } else { | |
361c99a6 | 588 | list_for_each_entry(counter, &evsel_list->entries, node) |
f5b4a9c3 SE |
589 | print_counter_aggr(counter); |
590 | } | |
ddcacfa0 | 591 | |
d7470b6a SE |
592 | if (!csv_output) { |
593 | fprintf(stderr, "\n"); | |
594 | fprintf(stderr, " %18.9f seconds time elapsed", | |
595 | avg_stats(&walltime_nsecs_stats)/1e9); | |
596 | if (run_count > 1) { | |
597 | fprintf(stderr, " ( +- %7.3f%% )", | |
506d4bc8 PZ |
598 | 100*stddev_stats(&walltime_nsecs_stats) / |
599 | avg_stats(&walltime_nsecs_stats)); | |
d7470b6a SE |
600 | } |
601 | fprintf(stderr, "\n\n"); | |
566747e6 | 602 | } |
ddcacfa0 IM |
603 | } |
604 | ||
f7b7c26e PZ |
605 | static volatile int signr = -1; |
606 | ||
5242519b | 607 | static void skip_signal(int signo) |
ddcacfa0 | 608 | { |
6be2850e | 609 | if(child_pid == -1) |
60666c63 LW |
610 | done = 1; |
611 | ||
f7b7c26e PZ |
612 | signr = signo; |
613 | } | |
614 | ||
615 | static void sig_atexit(void) | |
616 | { | |
933da83a CW |
617 | if (child_pid != -1) |
618 | kill(child_pid, SIGTERM); | |
619 | ||
f7b7c26e PZ |
620 | if (signr == -1) |
621 | return; | |
622 | ||
623 | signal(signr, SIG_DFL); | |
624 | kill(getpid(), signr); | |
5242519b IM |
625 | } |
626 | ||
627 | static const char * const stat_usage[] = { | |
60666c63 | 628 | "perf stat [<options>] [<command>]", |
5242519b IM |
629 | NULL |
630 | }; | |
631 | ||
d7470b6a SE |
632 | static int stat__set_big_num(const struct option *opt __used, |
633 | const char *s __used, int unset) | |
634 | { | |
635 | big_num_opt = unset ? 0 : 1; | |
636 | return 0; | |
637 | } | |
638 | ||
5242519b | 639 | static const struct option options[] = { |
361c99a6 | 640 | OPT_CALLBACK('e', "event", &evsel_list, "event", |
86847b62 TG |
641 | "event selector. use 'perf list' to list available events", |
642 | parse_events), | |
cfd748ae FW |
643 | OPT_CALLBACK(0, "filter", &evsel_list, "filter", |
644 | "event filter", parse_filter), | |
2e6cdf99 SE |
645 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
646 | "child tasks do not inherit counters"), | |
5242519b | 647 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
648 | "stat events on existing process id"), |
649 | OPT_INTEGER('t', "tid", &target_tid, | |
650 | "stat events on existing thread id"), | |
5242519b | 651 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
3d632595 | 652 | "system-wide collection from all CPUs"), |
b26bc5a7 | 653 | OPT_BOOLEAN('c', "scale", &scale, |
3d632595 | 654 | "scale/normalize counters"), |
c0555642 | 655 | OPT_INCR('v', "verbose", &verbose, |
743ee1f8 | 656 | "be more verbose (show counter open errors, etc)"), |
42202dd5 IM |
657 | OPT_INTEGER('r', "repeat", &run_count, |
658 | "repeat command and print average + stddev (max: 100)"), | |
0cfb7a13 IM |
659 | OPT_BOOLEAN('n', "null", &null_run, |
660 | "null run - dont start any counters"), | |
d7470b6a SE |
661 | OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, |
662 | "print large numbers with thousands\' separators", | |
663 | stat__set_big_num), | |
c45c6ea2 SE |
664 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
665 | "list of cpus to monitor in system-wide"), | |
f5b4a9c3 SE |
666 | OPT_BOOLEAN('A', "no-aggr", &no_aggr, |
667 | "disable CPU count aggregation"), | |
d7470b6a SE |
668 | OPT_STRING('x', "field-separator", &csv_sep, "separator", |
669 | "print counts with custom separator"), | |
023695d9 SE |
670 | OPT_CALLBACK('G', "cgroup", &evsel_list, "name", |
671 | "monitor event in cgroup name only", | |
672 | parse_cgroups), | |
5242519b IM |
673 | OPT_END() |
674 | }; | |
675 | ||
f37a291c | 676 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
5242519b | 677 | { |
69aad6f1 ACM |
678 | struct perf_evsel *pos; |
679 | int status = -ENOMEM; | |
42202dd5 | 680 | |
5af52b51 SE |
681 | setlocale(LC_ALL, ""); |
682 | ||
7e2ed097 | 683 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
684 | if (evsel_list == NULL) |
685 | return -ENOMEM; | |
686 | ||
a0541234 AB |
687 | argc = parse_options(argc, argv, options, stat_usage, |
688 | PARSE_OPT_STOP_AT_NON_OPTION); | |
d7470b6a SE |
689 | |
690 | if (csv_sep) | |
691 | csv_output = true; | |
692 | else | |
693 | csv_sep = DEFAULT_SEPARATOR; | |
694 | ||
695 | /* | |
696 | * let the spreadsheet do the pretty-printing | |
697 | */ | |
698 | if (csv_output) { | |
699 | /* User explicitely passed -B? */ | |
700 | if (big_num_opt == 1) { | |
701 | fprintf(stderr, "-B option not supported with -x\n"); | |
702 | usage_with_options(stat_usage, options); | |
703 | } else /* Nope, so disable big number formatting */ | |
704 | big_num = false; | |
705 | } else if (big_num_opt == 0) /* User passed --no-big-num */ | |
706 | big_num = false; | |
707 | ||
d6d901c2 | 708 | if (!argc && target_pid == -1 && target_tid == -1) |
5242519b | 709 | usage_with_options(stat_usage, options); |
9e9772c4 | 710 | if (run_count <= 0) |
42202dd5 | 711 | usage_with_options(stat_usage, options); |
ddcacfa0 | 712 | |
023695d9 SE |
713 | /* no_aggr, cgroup are for system-wide only */ |
714 | if ((no_aggr || nr_cgroups) && !system_wide) { | |
715 | fprintf(stderr, "both cgroup and no-aggregation " | |
716 | "modes only available in system-wide mode\n"); | |
717 | ||
f5b4a9c3 | 718 | usage_with_options(stat_usage, options); |
023695d9 | 719 | } |
f5b4a9c3 | 720 | |
c3043569 | 721 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
361c99a6 | 722 | if (!null_run && !evsel_list->nr_entries) { |
69aad6f1 ACM |
723 | size_t c; |
724 | ||
69aad6f1 | 725 | for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) { |
361c99a6 | 726 | pos = perf_evsel__new(&default_attrs[c], c); |
69aad6f1 ACM |
727 | if (pos == NULL) |
728 | goto out; | |
361c99a6 | 729 | perf_evlist__add(evsel_list, pos); |
69aad6f1 | 730 | } |
c3043569 | 731 | } |
ddcacfa0 | 732 | |
5c98d466 ACM |
733 | if (target_pid != -1) |
734 | target_tid = target_pid; | |
735 | ||
7e2ed097 ACM |
736 | evsel_list->threads = thread_map__new(target_pid, target_tid); |
737 | if (evsel_list->threads == NULL) { | |
5c98d466 ACM |
738 | pr_err("Problems finding threads of monitor\n"); |
739 | usage_with_options(stat_usage, options); | |
740 | } | |
741 | ||
a12b51c4 | 742 | if (system_wide) |
7e2ed097 | 743 | evsel_list->cpus = cpu_map__new(cpu_list); |
a12b51c4 | 744 | else |
7e2ed097 | 745 | evsel_list->cpus = cpu_map__dummy_new(); |
ddcacfa0 | 746 | |
7e2ed097 | 747 | if (evsel_list->cpus == NULL) { |
60d567e2 | 748 | perror("failed to parse CPUs map"); |
c45c6ea2 | 749 | usage_with_options(stat_usage, options); |
60d567e2 ACM |
750 | return -1; |
751 | } | |
c45c6ea2 | 752 | |
361c99a6 | 753 | list_for_each_entry(pos, &evsel_list->entries, node) { |
c52b12ed | 754 | if (perf_evsel__alloc_stat_priv(pos) < 0 || |
7e2ed097 ACM |
755 | perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 || |
756 | perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0) | |
69aad6f1 | 757 | goto out_free_fd; |
d6d901c2 ZY |
758 | } |
759 | ||
58d7e993 IM |
760 | /* |
761 | * We dont want to block the signals - that would cause | |
762 | * child tasks to inherit that and Ctrl-C would not work. | |
763 | * What we want is for Ctrl-C to work in the exec()-ed | |
764 | * task, but being ignored by perf stat itself: | |
765 | */ | |
f7b7c26e | 766 | atexit(sig_atexit); |
58d7e993 IM |
767 | signal(SIGINT, skip_signal); |
768 | signal(SIGALRM, skip_signal); | |
769 | signal(SIGABRT, skip_signal); | |
770 | ||
42202dd5 IM |
771 | status = 0; |
772 | for (run_idx = 0; run_idx < run_count; run_idx++) { | |
773 | if (run_count != 1 && verbose) | |
3d632595 | 774 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
42202dd5 IM |
775 | status = run_perf_stat(argc, argv); |
776 | } | |
777 | ||
084ab9f8 ACM |
778 | if (status != -1) |
779 | print_stat(argc, argv); | |
69aad6f1 | 780 | out_free_fd: |
361c99a6 | 781 | list_for_each_entry(pos, &evsel_list->entries, node) |
69aad6f1 | 782 | perf_evsel__free_stat_priv(pos); |
7e2ed097 | 783 | perf_evlist__delete_maps(evsel_list); |
0015e2e1 ACM |
784 | out: |
785 | perf_evlist__delete(evsel_list); | |
42202dd5 | 786 | return status; |
ddcacfa0 | 787 | } |