Commit | Line | Data |
---|---|---|
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 | |
5d2cd909 ACM |
170 | attr->inherit = !no_inherit; |
171 | ||
48290609 | 172 | if (system_wide) |
5d2cd909 | 173 | return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false); |
48290609 | 174 | |
48290609 ACM |
175 | if (target_pid == -1 && target_tid == -1) { |
176 | attr->disabled = 1; | |
177 | attr->enable_on_exec = 1; | |
ddcacfa0 | 178 | } |
084ab9f8 | 179 | |
5d2cd909 | 180 | return perf_evsel__open_per_thread(evsel, evsel_list->threads, false); |
ddcacfa0 IM |
181 | } |
182 | ||
c04f5e5d IM |
183 | /* |
184 | * Does the counter have nsecs as a unit? | |
185 | */ | |
daec78a0 | 186 | static inline int nsec_counter(struct perf_evsel *evsel) |
c04f5e5d | 187 | { |
daec78a0 ACM |
188 | if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) || |
189 | perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) | |
c04f5e5d IM |
190 | return 1; |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | /* | |
2996f5dd | 196 | * Read out the results of a single counter: |
f5b4a9c3 | 197 | * aggregate counts across CPUs in system-wide mode |
c04f5e5d | 198 | */ |
c52b12ed | 199 | static int read_counter_aggr(struct perf_evsel *counter) |
c04f5e5d | 200 | { |
69aad6f1 | 201 | struct perf_stat *ps = counter->priv; |
c52b12ed ACM |
202 | u64 *count = counter->counts->aggr.values; |
203 | int i; | |
2996f5dd | 204 | |
7e2ed097 ACM |
205 | if (__perf_evsel__read(counter, evsel_list->cpus->nr, |
206 | evsel_list->threads->nr, scale) < 0) | |
c52b12ed | 207 | return -1; |
9e9772c4 PZ |
208 | |
209 | for (i = 0; i < 3; i++) | |
69aad6f1 | 210 | update_stats(&ps->res_stats[i], count[i]); |
9e9772c4 PZ |
211 | |
212 | if (verbose) { | |
9486aa38 ACM |
213 | fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", |
214 | event_name(counter), count[0], count[1], count[2]); | |
9e9772c4 PZ |
215 | } |
216 | ||
be1ac0d8 IM |
217 | /* |
218 | * Save the full runtime - to allow normalization during printout: | |
219 | */ | |
daec78a0 | 220 | if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) |
f5b4a9c3 | 221 | update_stats(&runtime_nsecs_stats[0], count[0]); |
daec78a0 | 222 | if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) |
f5b4a9c3 | 223 | update_stats(&runtime_cycles_stats[0], count[0]); |
daec78a0 | 224 | if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) |
f5b4a9c3 | 225 | update_stats(&runtime_branches_stats[0], count[0]); |
c52b12ed ACM |
226 | |
227 | return 0; | |
f5b4a9c3 SE |
228 | } |
229 | ||
230 | /* | |
231 | * Read out the results of a single counter: | |
232 | * do not aggregate counts across CPUs in system-wide mode | |
233 | */ | |
c52b12ed | 234 | static int read_counter(struct perf_evsel *counter) |
f5b4a9c3 | 235 | { |
c52b12ed | 236 | u64 *count; |
f5b4a9c3 | 237 | int cpu; |
f5b4a9c3 | 238 | |
7e2ed097 | 239 | for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { |
c52b12ed ACM |
240 | if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0) |
241 | return -1; | |
f5b4a9c3 | 242 | |
c52b12ed | 243 | count = counter->counts->cpu[cpu].values; |
f5b4a9c3 | 244 | |
daec78a0 | 245 | if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) |
f5b4a9c3 | 246 | update_stats(&runtime_nsecs_stats[cpu], count[0]); |
daec78a0 | 247 | if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) |
f5b4a9c3 | 248 | update_stats(&runtime_cycles_stats[cpu], count[0]); |
daec78a0 | 249 | if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) |
f5b4a9c3 SE |
250 | update_stats(&runtime_branches_stats[cpu], count[0]); |
251 | } | |
c52b12ed ACM |
252 | |
253 | return 0; | |
2996f5dd IM |
254 | } |
255 | ||
f37a291c | 256 | static int run_perf_stat(int argc __used, const char **argv) |
42202dd5 IM |
257 | { |
258 | unsigned long long t0, t1; | |
69aad6f1 | 259 | struct perf_evsel *counter; |
42202dd5 | 260 | int status = 0; |
051ae7f7 | 261 | int child_ready_pipe[2], go_pipe[2]; |
6be2850e | 262 | const bool forks = (argc > 0); |
051ae7f7 | 263 | char buf; |
42202dd5 | 264 | |
60666c63 | 265 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
051ae7f7 PM |
266 | perror("failed to create pipes"); |
267 | exit(1); | |
268 | } | |
269 | ||
60666c63 | 270 | if (forks) { |
6be2850e | 271 | if ((child_pid = fork()) < 0) |
60666c63 LW |
272 | perror("failed to fork"); |
273 | ||
6be2850e | 274 | if (!child_pid) { |
60666c63 LW |
275 | close(child_ready_pipe[0]); |
276 | close(go_pipe[1]); | |
277 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
278 | ||
279 | /* | |
280 | * Do a dummy execvp to get the PLT entry resolved, | |
281 | * so we avoid the resolver overhead on the real | |
282 | * execvp call. | |
283 | */ | |
284 | execvp("", (char **)argv); | |
285 | ||
286 | /* | |
287 | * Tell the parent we're ready to go | |
288 | */ | |
289 | close(child_ready_pipe[1]); | |
290 | ||
291 | /* | |
292 | * Wait until the parent tells us to go. | |
293 | */ | |
294 | if (read(go_pipe[0], &buf, 1) == -1) | |
295 | perror("unable to read pipe"); | |
296 | ||
297 | execvp(argv[0], (char **)argv); | |
298 | ||
299 | perror(argv[0]); | |
300 | exit(-1); | |
301 | } | |
051ae7f7 | 302 | |
d6d901c2 | 303 | if (target_tid == -1 && target_pid == -1 && !system_wide) |
7e2ed097 | 304 | evsel_list->threads->map[0] = child_pid; |
d6d901c2 | 305 | |
051ae7f7 | 306 | /* |
60666c63 | 307 | * Wait for the child to be ready to exec. |
051ae7f7 PM |
308 | */ |
309 | close(child_ready_pipe[1]); | |
60666c63 LW |
310 | close(go_pipe[0]); |
311 | if (read(child_ready_pipe[0], &buf, 1) == -1) | |
a92bef0f | 312 | perror("unable to read pipe"); |
60666c63 | 313 | close(child_ready_pipe[0]); |
051ae7f7 PM |
314 | } |
315 | ||
361c99a6 | 316 | list_for_each_entry(counter, &evsel_list->entries, node) { |
48290609 ACM |
317 | if (create_perf_stat_counter(counter) < 0) { |
318 | if (errno == -EPERM || errno == -EACCES) { | |
319 | error("You may not have permission to collect %sstats.\n" | |
320 | "\t Consider tweaking" | |
321 | " /proc/sys/kernel/perf_event_paranoid or running as root.", | |
322 | system_wide ? "system-wide " : ""); | |
5a3446bc DA |
323 | } else if (errno == ENOENT) { |
324 | error("%s event is not supported. ", event_name(counter)); | |
48290609 ACM |
325 | } else { |
326 | error("open_counter returned with %d (%s). " | |
327 | "/bin/dmesg may provide additional information.\n", | |
328 | errno, strerror(errno)); | |
329 | } | |
330 | if (child_pid != -1) | |
331 | kill(child_pid, SIGTERM); | |
332 | die("Not all events could be opened.\n"); | |
333 | return -1; | |
334 | } | |
084ab9f8 | 335 | } |
42202dd5 | 336 | |
cfd748ae FW |
337 | if (perf_evlist__set_filters(evsel_list)) { |
338 | error("failed to set filter with %d (%s)\n", errno, | |
339 | strerror(errno)); | |
340 | return -1; | |
341 | } | |
342 | ||
42202dd5 IM |
343 | /* |
344 | * Enable counters and exec the command: | |
345 | */ | |
346 | t0 = rdclock(); | |
42202dd5 | 347 | |
60666c63 LW |
348 | if (forks) { |
349 | close(go_pipe[1]); | |
350 | wait(&status); | |
351 | } else { | |
6be2850e | 352 | while(!done) sleep(1); |
60666c63 | 353 | } |
42202dd5 | 354 | |
42202dd5 IM |
355 | t1 = rdclock(); |
356 | ||
9e9772c4 | 357 | update_stats(&walltime_nsecs_stats, t1 - t0); |
42202dd5 | 358 | |
f5b4a9c3 | 359 | if (no_aggr) { |
361c99a6 | 360 | list_for_each_entry(counter, &evsel_list->entries, node) { |
f5b4a9c3 | 361 | read_counter(counter); |
7e2ed097 | 362 | perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1); |
c52b12ed | 363 | } |
f5b4a9c3 | 364 | } else { |
361c99a6 | 365 | list_for_each_entry(counter, &evsel_list->entries, node) { |
f5b4a9c3 | 366 | read_counter_aggr(counter); |
7e2ed097 ACM |
367 | perf_evsel__close_fd(counter, evsel_list->cpus->nr, |
368 | evsel_list->threads->nr); | |
c52b12ed | 369 | } |
f5b4a9c3 | 370 | } |
c52b12ed | 371 | |
42202dd5 IM |
372 | return WEXITSTATUS(status); |
373 | } | |
374 | ||
69aad6f1 | 375 | static void print_noise(struct perf_evsel *evsel, double avg) |
42202dd5 | 376 | { |
69aad6f1 ACM |
377 | struct perf_stat *ps; |
378 | ||
849abde9 PZ |
379 | if (run_count == 1) |
380 | return; | |
381 | ||
69aad6f1 | 382 | ps = evsel->priv; |
849abde9 | 383 | fprintf(stderr, " ( +- %7.3f%% )", |
69aad6f1 | 384 | 100 * stddev_stats(&ps->res_stats[0]) / avg); |
42202dd5 IM |
385 | } |
386 | ||
daec78a0 | 387 | static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg) |
44175b6f | 388 | { |
506d4bc8 | 389 | double msecs = avg / 1e6; |
d7470b6a SE |
390 | char cpustr[16] = { '\0', }; |
391 | const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s"; | |
44175b6f | 392 | |
f5b4a9c3 | 393 | if (no_aggr) |
d7470b6a SE |
394 | sprintf(cpustr, "CPU%*d%s", |
395 | csv_output ? 0 : -4, | |
7e2ed097 | 396 | evsel_list->cpus->map[cpu], csv_sep); |
d7470b6a | 397 | |
daec78a0 | 398 | fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel)); |
d7470b6a | 399 | |
023695d9 SE |
400 | if (evsel->cgrp) |
401 | fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name); | |
402 | ||
d7470b6a SE |
403 | if (csv_output) |
404 | return; | |
44175b6f | 405 | |
daec78a0 | 406 | if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) |
506d4bc8 PZ |
407 | fprintf(stderr, " # %10.3f CPUs ", |
408 | avg / avg_stats(&walltime_nsecs_stats)); | |
44175b6f IM |
409 | } |
410 | ||
daec78a0 | 411 | static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) |
44175b6f | 412 | { |
c7f7fea3 | 413 | double total, ratio = 0.0; |
f5b4a9c3 | 414 | char cpustr[16] = { '\0', }; |
d7470b6a SE |
415 | const char *fmt; |
416 | ||
417 | if (csv_output) | |
418 | fmt = "%s%.0f%s%s"; | |
419 | else if (big_num) | |
420 | fmt = "%s%'18.0f%s%-24s"; | |
421 | else | |
422 | fmt = "%s%18.0f%s%-24s"; | |
f5b4a9c3 SE |
423 | |
424 | if (no_aggr) | |
d7470b6a SE |
425 | sprintf(cpustr, "CPU%*d%s", |
426 | csv_output ? 0 : -4, | |
7e2ed097 | 427 | evsel_list->cpus->map[cpu], csv_sep); |
f5b4a9c3 SE |
428 | else |
429 | cpu = 0; | |
c7f7fea3 | 430 | |
daec78a0 | 431 | fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel)); |
d7470b6a | 432 | |
023695d9 SE |
433 | if (evsel->cgrp) |
434 | fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name); | |
435 | ||
d7470b6a SE |
436 | if (csv_output) |
437 | return; | |
44175b6f | 438 | |
daec78a0 | 439 | if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { |
f5b4a9c3 | 440 | total = avg_stats(&runtime_cycles_stats[cpu]); |
c7f7fea3 IM |
441 | |
442 | if (total) | |
443 | ratio = avg / total; | |
444 | ||
11ba2b85 | 445 | fprintf(stderr, " # ( %4.2f instructions per cycle )", ratio); |
daec78a0 | 446 | } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) && |
f5b4a9c3 SE |
447 | runtime_branches_stats[cpu].n != 0) { |
448 | total = avg_stats(&runtime_branches_stats[cpu]); | |
11018201 AB |
449 | |
450 | if (total) | |
451 | ratio = avg * 100 / total; | |
452 | ||
11ba2b85 | 453 | fprintf(stderr, " # %10.3f %%", ratio); |
11018201 | 454 | |
f5b4a9c3 SE |
455 | } else if (runtime_nsecs_stats[cpu].n != 0) { |
456 | total = avg_stats(&runtime_nsecs_stats[cpu]); | |
c7f7fea3 IM |
457 | |
458 | if (total) | |
459 | ratio = 1000.0 * avg / total; | |
460 | ||
461 | fprintf(stderr, " # %10.3f M/sec", ratio); | |
11ba2b85 IM |
462 | } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES)) { |
463 | total = avg_stats(&runtime_cycles_stats[cpu]); | |
464 | ||
465 | if (total) | |
466 | ratio = avg / total * 100.0; | |
467 | ||
468 | fprintf(stderr, " # (%5.2f%% of all cycles )", ratio); | |
44175b6f | 469 | } |
44175b6f IM |
470 | } |
471 | ||
2996f5dd IM |
472 | /* |
473 | * Print out the results of a single counter: | |
f5b4a9c3 | 474 | * aggregated counts in system-wide mode |
2996f5dd | 475 | */ |
69aad6f1 | 476 | static void print_counter_aggr(struct perf_evsel *counter) |
2996f5dd | 477 | { |
69aad6f1 ACM |
478 | struct perf_stat *ps = counter->priv; |
479 | double avg = avg_stats(&ps->res_stats[0]); | |
c52b12ed | 480 | int scaled = counter->counts->scaled; |
2996f5dd | 481 | |
2996f5dd | 482 | if (scaled == -1) { |
023695d9 | 483 | fprintf(stderr, "%*s%s%*s", |
d7470b6a | 484 | csv_output ? 0 : 18, |
023695d9 SE |
485 | "<not counted>", |
486 | csv_sep, | |
487 | csv_output ? 0 : -24, | |
488 | event_name(counter)); | |
489 | ||
490 | if (counter->cgrp) | |
491 | fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name); | |
492 | ||
493 | fputc('\n', stderr); | |
2996f5dd IM |
494 | return; |
495 | } | |
c04f5e5d | 496 | |
44175b6f | 497 | if (nsec_counter(counter)) |
f5b4a9c3 | 498 | nsec_printout(-1, counter, avg); |
44175b6f | 499 | else |
f5b4a9c3 | 500 | abs_printout(-1, counter, avg); |
849abde9 | 501 | |
d7470b6a SE |
502 | if (csv_output) { |
503 | fputc('\n', stderr); | |
504 | return; | |
505 | } | |
506 | ||
849abde9 | 507 | print_noise(counter, avg); |
506d4bc8 PZ |
508 | |
509 | if (scaled) { | |
510 | double avg_enabled, avg_running; | |
511 | ||
69aad6f1 ACM |
512 | avg_enabled = avg_stats(&ps->res_stats[1]); |
513 | avg_running = avg_stats(&ps->res_stats[2]); | |
d7c29318 | 514 | |
210ad39f | 515 | fprintf(stderr, " (scaled from %.2f%%)", |
506d4bc8 PZ |
516 | 100 * avg_running / avg_enabled); |
517 | } | |
c04f5e5d IM |
518 | fprintf(stderr, "\n"); |
519 | } | |
520 | ||
f5b4a9c3 SE |
521 | /* |
522 | * Print out the results of a single counter: | |
523 | * does not use aggregated count in system-wide | |
524 | */ | |
69aad6f1 | 525 | static void print_counter(struct perf_evsel *counter) |
f5b4a9c3 SE |
526 | { |
527 | u64 ena, run, val; | |
528 | int cpu; | |
529 | ||
7e2ed097 | 530 | for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) { |
c52b12ed ACM |
531 | val = counter->counts->cpu[cpu].val; |
532 | ena = counter->counts->cpu[cpu].ena; | |
533 | run = counter->counts->cpu[cpu].run; | |
f5b4a9c3 | 534 | if (run == 0 || ena == 0) { |
023695d9 | 535 | fprintf(stderr, "CPU%*d%s%*s%s%*s", |
d7470b6a | 536 | csv_output ? 0 : -4, |
7e2ed097 | 537 | evsel_list->cpus->map[cpu], csv_sep, |
d7470b6a SE |
538 | csv_output ? 0 : 18, |
539 | "<not counted>", csv_sep, | |
023695d9 | 540 | csv_output ? 0 : -24, |
d7470b6a | 541 | event_name(counter)); |
f5b4a9c3 | 542 | |
023695d9 SE |
543 | if (counter->cgrp) |
544 | fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name); | |
545 | ||
546 | fputc('\n', stderr); | |
f5b4a9c3 SE |
547 | continue; |
548 | } | |
549 | ||
550 | if (nsec_counter(counter)) | |
551 | nsec_printout(cpu, counter, val); | |
552 | else | |
553 | abs_printout(cpu, counter, val); | |
554 | ||
d7470b6a SE |
555 | if (!csv_output) { |
556 | print_noise(counter, 1.0); | |
f5b4a9c3 | 557 | |
d7470b6a SE |
558 | if (run != ena) { |
559 | fprintf(stderr, " (scaled from %.2f%%)", | |
f5b4a9c3 | 560 | 100.0 * run / ena); |
d7470b6a | 561 | } |
f5b4a9c3 | 562 | } |
023695d9 | 563 | fputc('\n', stderr); |
f5b4a9c3 SE |
564 | } |
565 | } | |
566 | ||
42202dd5 IM |
567 | static void print_stat(int argc, const char **argv) |
568 | { | |
69aad6f1 ACM |
569 | struct perf_evsel *counter; |
570 | int i; | |
42202dd5 | 571 | |
ddcacfa0 IM |
572 | fflush(stdout); |
573 | ||
d7470b6a SE |
574 | if (!csv_output) { |
575 | fprintf(stderr, "\n"); | |
576 | fprintf(stderr, " Performance counter stats for "); | |
577 | if(target_pid == -1 && target_tid == -1) { | |
578 | fprintf(stderr, "\'%s", argv[0]); | |
579 | for (i = 1; i < argc; i++) | |
580 | fprintf(stderr, " %s", argv[i]); | |
581 | } else if (target_pid != -1) | |
582 | fprintf(stderr, "process id \'%d", target_pid); | |
583 | else | |
584 | fprintf(stderr, "thread id \'%d", target_tid); | |
44db76c8 | 585 | |
d7470b6a SE |
586 | fprintf(stderr, "\'"); |
587 | if (run_count > 1) | |
588 | fprintf(stderr, " (%d runs)", run_count); | |
589 | fprintf(stderr, ":\n\n"); | |
590 | } | |
2996f5dd | 591 | |
f5b4a9c3 | 592 | if (no_aggr) { |
361c99a6 | 593 | list_for_each_entry(counter, &evsel_list->entries, node) |
f5b4a9c3 SE |
594 | print_counter(counter); |
595 | } else { | |
361c99a6 | 596 | list_for_each_entry(counter, &evsel_list->entries, node) |
f5b4a9c3 SE |
597 | print_counter_aggr(counter); |
598 | } | |
ddcacfa0 | 599 | |
d7470b6a SE |
600 | if (!csv_output) { |
601 | fprintf(stderr, "\n"); | |
602 | fprintf(stderr, " %18.9f seconds time elapsed", | |
603 | avg_stats(&walltime_nsecs_stats)/1e9); | |
604 | if (run_count > 1) { | |
605 | fprintf(stderr, " ( +- %7.3f%% )", | |
506d4bc8 PZ |
606 | 100*stddev_stats(&walltime_nsecs_stats) / |
607 | avg_stats(&walltime_nsecs_stats)); | |
d7470b6a SE |
608 | } |
609 | fprintf(stderr, "\n\n"); | |
566747e6 | 610 | } |
ddcacfa0 IM |
611 | } |
612 | ||
f7b7c26e PZ |
613 | static volatile int signr = -1; |
614 | ||
5242519b | 615 | static void skip_signal(int signo) |
ddcacfa0 | 616 | { |
6be2850e | 617 | if(child_pid == -1) |
60666c63 LW |
618 | done = 1; |
619 | ||
f7b7c26e PZ |
620 | signr = signo; |
621 | } | |
622 | ||
623 | static void sig_atexit(void) | |
624 | { | |
933da83a CW |
625 | if (child_pid != -1) |
626 | kill(child_pid, SIGTERM); | |
627 | ||
f7b7c26e PZ |
628 | if (signr == -1) |
629 | return; | |
630 | ||
631 | signal(signr, SIG_DFL); | |
632 | kill(getpid(), signr); | |
5242519b IM |
633 | } |
634 | ||
635 | static const char * const stat_usage[] = { | |
60666c63 | 636 | "perf stat [<options>] [<command>]", |
5242519b IM |
637 | NULL |
638 | }; | |
639 | ||
d7470b6a SE |
640 | static int stat__set_big_num(const struct option *opt __used, |
641 | const char *s __used, int unset) | |
642 | { | |
643 | big_num_opt = unset ? 0 : 1; | |
644 | return 0; | |
645 | } | |
646 | ||
5242519b | 647 | static const struct option options[] = { |
361c99a6 | 648 | OPT_CALLBACK('e', "event", &evsel_list, "event", |
86847b62 TG |
649 | "event selector. use 'perf list' to list available events", |
650 | parse_events), | |
cfd748ae FW |
651 | OPT_CALLBACK(0, "filter", &evsel_list, "filter", |
652 | "event filter", parse_filter), | |
2e6cdf99 SE |
653 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
654 | "child tasks do not inherit counters"), | |
5242519b | 655 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
656 | "stat events on existing process id"), |
657 | OPT_INTEGER('t', "tid", &target_tid, | |
658 | "stat events on existing thread id"), | |
5242519b | 659 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
3d632595 | 660 | "system-wide collection from all CPUs"), |
b26bc5a7 | 661 | OPT_BOOLEAN('c', "scale", &scale, |
3d632595 | 662 | "scale/normalize counters"), |
c0555642 | 663 | OPT_INCR('v', "verbose", &verbose, |
743ee1f8 | 664 | "be more verbose (show counter open errors, etc)"), |
42202dd5 IM |
665 | OPT_INTEGER('r', "repeat", &run_count, |
666 | "repeat command and print average + stddev (max: 100)"), | |
0cfb7a13 IM |
667 | OPT_BOOLEAN('n', "null", &null_run, |
668 | "null run - dont start any counters"), | |
d7470b6a SE |
669 | OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, |
670 | "print large numbers with thousands\' separators", | |
671 | stat__set_big_num), | |
c45c6ea2 SE |
672 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
673 | "list of cpus to monitor in system-wide"), | |
f5b4a9c3 SE |
674 | OPT_BOOLEAN('A', "no-aggr", &no_aggr, |
675 | "disable CPU count aggregation"), | |
d7470b6a SE |
676 | OPT_STRING('x', "field-separator", &csv_sep, "separator", |
677 | "print counts with custom separator"), | |
023695d9 SE |
678 | OPT_CALLBACK('G', "cgroup", &evsel_list, "name", |
679 | "monitor event in cgroup name only", | |
680 | parse_cgroups), | |
5242519b IM |
681 | OPT_END() |
682 | }; | |
683 | ||
f37a291c | 684 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
5242519b | 685 | { |
69aad6f1 ACM |
686 | struct perf_evsel *pos; |
687 | int status = -ENOMEM; | |
42202dd5 | 688 | |
5af52b51 SE |
689 | setlocale(LC_ALL, ""); |
690 | ||
7e2ed097 | 691 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
692 | if (evsel_list == NULL) |
693 | return -ENOMEM; | |
694 | ||
a0541234 AB |
695 | argc = parse_options(argc, argv, options, stat_usage, |
696 | PARSE_OPT_STOP_AT_NON_OPTION); | |
d7470b6a SE |
697 | |
698 | if (csv_sep) | |
699 | csv_output = true; | |
700 | else | |
701 | csv_sep = DEFAULT_SEPARATOR; | |
702 | ||
703 | /* | |
704 | * let the spreadsheet do the pretty-printing | |
705 | */ | |
706 | if (csv_output) { | |
707 | /* User explicitely passed -B? */ | |
708 | if (big_num_opt == 1) { | |
709 | fprintf(stderr, "-B option not supported with -x\n"); | |
710 | usage_with_options(stat_usage, options); | |
711 | } else /* Nope, so disable big number formatting */ | |
712 | big_num = false; | |
713 | } else if (big_num_opt == 0) /* User passed --no-big-num */ | |
714 | big_num = false; | |
715 | ||
d6d901c2 | 716 | if (!argc && target_pid == -1 && target_tid == -1) |
5242519b | 717 | usage_with_options(stat_usage, options); |
9e9772c4 | 718 | if (run_count <= 0) |
42202dd5 | 719 | usage_with_options(stat_usage, options); |
ddcacfa0 | 720 | |
023695d9 SE |
721 | /* no_aggr, cgroup are for system-wide only */ |
722 | if ((no_aggr || nr_cgroups) && !system_wide) { | |
723 | fprintf(stderr, "both cgroup and no-aggregation " | |
724 | "modes only available in system-wide mode\n"); | |
725 | ||
f5b4a9c3 | 726 | usage_with_options(stat_usage, options); |
023695d9 | 727 | } |
f5b4a9c3 | 728 | |
c3043569 | 729 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
361c99a6 | 730 | if (!null_run && !evsel_list->nr_entries) { |
69aad6f1 ACM |
731 | size_t c; |
732 | ||
69aad6f1 | 733 | for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) { |
361c99a6 | 734 | pos = perf_evsel__new(&default_attrs[c], c); |
69aad6f1 ACM |
735 | if (pos == NULL) |
736 | goto out; | |
361c99a6 | 737 | perf_evlist__add(evsel_list, pos); |
69aad6f1 | 738 | } |
c3043569 | 739 | } |
ddcacfa0 | 740 | |
5c98d466 ACM |
741 | if (target_pid != -1) |
742 | target_tid = target_pid; | |
743 | ||
7e2ed097 ACM |
744 | evsel_list->threads = thread_map__new(target_pid, target_tid); |
745 | if (evsel_list->threads == NULL) { | |
5c98d466 ACM |
746 | pr_err("Problems finding threads of monitor\n"); |
747 | usage_with_options(stat_usage, options); | |
748 | } | |
749 | ||
a12b51c4 | 750 | if (system_wide) |
7e2ed097 | 751 | evsel_list->cpus = cpu_map__new(cpu_list); |
a12b51c4 | 752 | else |
7e2ed097 | 753 | evsel_list->cpus = cpu_map__dummy_new(); |
ddcacfa0 | 754 | |
7e2ed097 | 755 | if (evsel_list->cpus == NULL) { |
60d567e2 | 756 | perror("failed to parse CPUs map"); |
c45c6ea2 | 757 | usage_with_options(stat_usage, options); |
60d567e2 ACM |
758 | return -1; |
759 | } | |
c45c6ea2 | 760 | |
361c99a6 | 761 | list_for_each_entry(pos, &evsel_list->entries, node) { |
c52b12ed | 762 | if (perf_evsel__alloc_stat_priv(pos) < 0 || |
7e2ed097 ACM |
763 | perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 || |
764 | perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0) | |
69aad6f1 | 765 | goto out_free_fd; |
d6d901c2 ZY |
766 | } |
767 | ||
58d7e993 IM |
768 | /* |
769 | * We dont want to block the signals - that would cause | |
770 | * child tasks to inherit that and Ctrl-C would not work. | |
771 | * What we want is for Ctrl-C to work in the exec()-ed | |
772 | * task, but being ignored by perf stat itself: | |
773 | */ | |
f7b7c26e | 774 | atexit(sig_atexit); |
58d7e993 IM |
775 | signal(SIGINT, skip_signal); |
776 | signal(SIGALRM, skip_signal); | |
777 | signal(SIGABRT, skip_signal); | |
778 | ||
42202dd5 IM |
779 | status = 0; |
780 | for (run_idx = 0; run_idx < run_count; run_idx++) { | |
781 | if (run_count != 1 && verbose) | |
3d632595 | 782 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
42202dd5 IM |
783 | status = run_perf_stat(argc, argv); |
784 | } | |
785 | ||
084ab9f8 ACM |
786 | if (status != -1) |
787 | print_stat(argc, argv); | |
69aad6f1 | 788 | out_free_fd: |
361c99a6 | 789 | list_for_each_entry(pos, &evsel_list->entries, node) |
69aad6f1 | 790 | perf_evsel__free_stat_priv(pos); |
7e2ed097 | 791 | perf_evlist__delete_maps(evsel_list); |
0015e2e1 ACM |
792 | out: |
793 | perf_evlist__delete(evsel_list); | |
42202dd5 | 794 | return status; |
ddcacfa0 | 795 | } |