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" |
69aad6f1 | 46 | #include "util/evsel.h" |
8f28827a | 47 | #include "util/debug.h" |
60666c63 | 48 | #include "util/header.h" |
a12b51c4 | 49 | #include "util/cpumap.h" |
d6d901c2 | 50 | #include "util/thread.h" |
ddcacfa0 | 51 | |
ddcacfa0 | 52 | #include <sys/prctl.h> |
42202dd5 | 53 | #include <math.h> |
5af52b51 | 54 | #include <locale.h> |
16c8a109 | 55 | |
d7470b6a SE |
56 | #define DEFAULT_SEPARATOR " " |
57 | ||
cdd6c482 | 58 | static struct perf_event_attr default_attrs[] = { |
ddcacfa0 | 59 | |
56aab464 IM |
60 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
61 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, | |
62 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, | |
63 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, | |
f4dbfa8f | 64 | |
56aab464 IM |
65 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
66 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, | |
56aab464 IM |
67 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, |
68 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, | |
dd86e72a IM |
69 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, |
70 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, | |
f4dbfa8f | 71 | |
ddcacfa0 | 72 | }; |
5242519b | 73 | |
c0555642 | 74 | static bool system_wide = false; |
60d567e2 | 75 | static struct cpu_map *cpus; |
3d632595 | 76 | static int run_idx = 0; |
ddcacfa0 | 77 | |
3d632595 | 78 | static int run_count = 1; |
2e6cdf99 | 79 | static bool no_inherit = false; |
c0555642 | 80 | static bool scale = true; |
f5b4a9c3 | 81 | static bool no_aggr = false; |
933da83a | 82 | static pid_t target_pid = -1; |
d6d901c2 | 83 | static pid_t target_tid = -1; |
5c98d466 | 84 | static struct thread_map *threads; |
933da83a | 85 | static pid_t child_pid = -1; |
c0555642 | 86 | static bool null_run = false; |
201e0b06 | 87 | static bool big_num = true; |
d7470b6a | 88 | static int big_num_opt = -1; |
c45c6ea2 | 89 | static const char *cpu_list; |
d7470b6a SE |
90 | static const char *csv_sep = NULL; |
91 | static bool csv_output = false; | |
5af52b51 | 92 | |
60666c63 LW |
93 | static volatile int done = 0; |
94 | ||
506d4bc8 PZ |
95 | struct stats |
96 | { | |
8a02631a | 97 | double n, mean, M2; |
506d4bc8 | 98 | }; |
42202dd5 | 99 | |
69aad6f1 ACM |
100 | struct perf_stat { |
101 | struct stats res_stats[3]; | |
69aad6f1 ACM |
102 | }; |
103 | ||
c52b12ed | 104 | static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel) |
69aad6f1 | 105 | { |
c52b12ed | 106 | evsel->priv = zalloc(sizeof(struct perf_stat)); |
69aad6f1 ACM |
107 | return evsel->priv == NULL ? -ENOMEM : 0; |
108 | } | |
109 | ||
110 | static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) | |
111 | { | |
112 | free(evsel->priv); | |
113 | evsel->priv = NULL; | |
114 | } | |
115 | ||
9e9772c4 PZ |
116 | static void update_stats(struct stats *stats, u64 val) |
117 | { | |
8a02631a | 118 | double delta; |
9e9772c4 | 119 | |
8a02631a PZ |
120 | stats->n++; |
121 | delta = val - stats->mean; | |
122 | stats->mean += delta / stats->n; | |
123 | stats->M2 += delta*(val - stats->mean); | |
9e9772c4 PZ |
124 | } |
125 | ||
506d4bc8 PZ |
126 | static double avg_stats(struct stats *stats) |
127 | { | |
8a02631a | 128 | return stats->mean; |
506d4bc8 | 129 | } |
42202dd5 | 130 | |
506d4bc8 | 131 | /* |
63d40deb PZ |
132 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance |
133 | * | |
8a02631a PZ |
134 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n |
135 | * s^2 = ------------------------------- | |
136 | * n - 1 | |
63d40deb PZ |
137 | * |
138 | * http://en.wikipedia.org/wiki/Stddev | |
139 | * | |
140 | * The std dev of the mean is related to the std dev by: | |
141 | * | |
142 | * s | |
143 | * s_mean = ------- | |
144 | * sqrt(n) | |
145 | * | |
506d4bc8 PZ |
146 | */ |
147 | static double stddev_stats(struct stats *stats) | |
148 | { | |
8a02631a PZ |
149 | double variance = stats->M2 / (stats->n - 1); |
150 | double variance_mean = variance / stats->n; | |
42202dd5 | 151 | |
63d40deb | 152 | return sqrt(variance_mean); |
506d4bc8 | 153 | } |
42202dd5 | 154 | |
f5b4a9c3 SE |
155 | struct stats runtime_nsecs_stats[MAX_NR_CPUS]; |
156 | struct stats runtime_cycles_stats[MAX_NR_CPUS]; | |
157 | struct stats runtime_branches_stats[MAX_NR_CPUS]; | |
506d4bc8 | 158 | struct stats walltime_nsecs_stats; |
be1ac0d8 | 159 | |
48290609 | 160 | static int create_perf_stat_counter(struct perf_evsel *evsel) |
ddcacfa0 | 161 | { |
69aad6f1 | 162 | struct perf_event_attr *attr = &evsel->attr; |
16c8a109 | 163 | |
ddcacfa0 | 164 | if (scale) |
a21ca2ca IM |
165 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
166 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
ddcacfa0 | 167 | |
48290609 | 168 | if (system_wide) |
86bd5e86 | 169 | return perf_evsel__open_per_cpu(evsel, cpus); |
48290609 ACM |
170 | |
171 | attr->inherit = !no_inherit; | |
172 | if (target_pid == -1 && target_tid == -1) { | |
173 | attr->disabled = 1; | |
174 | attr->enable_on_exec = 1; | |
ddcacfa0 | 175 | } |
084ab9f8 | 176 | |
86bd5e86 | 177 | return perf_evsel__open_per_thread(evsel, threads); |
ddcacfa0 IM |
178 | } |
179 | ||
c04f5e5d IM |
180 | /* |
181 | * Does the counter have nsecs as a unit? | |
182 | */ | |
daec78a0 | 183 | static inline int nsec_counter(struct perf_evsel *evsel) |
c04f5e5d | 184 | { |
daec78a0 ACM |
185 | if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) || |
186 | perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) | |
c04f5e5d IM |
187 | return 1; |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | /* | |
2996f5dd | 193 | * Read out the results of a single counter: |
f5b4a9c3 | 194 | * aggregate counts across CPUs in system-wide mode |
c04f5e5d | 195 | */ |
c52b12ed | 196 | static int read_counter_aggr(struct perf_evsel *counter) |
c04f5e5d | 197 | { |
69aad6f1 | 198 | struct perf_stat *ps = counter->priv; |
c52b12ed ACM |
199 | u64 *count = counter->counts->aggr.values; |
200 | int i; | |
2996f5dd | 201 | |
5c98d466 | 202 | if (__perf_evsel__read(counter, cpus->nr, threads->nr, scale) < 0) |
c52b12ed | 203 | return -1; |
9e9772c4 PZ |
204 | |
205 | for (i = 0; i < 3; i++) | |
69aad6f1 | 206 | update_stats(&ps->res_stats[i], count[i]); |
9e9772c4 PZ |
207 | |
208 | if (verbose) { | |
209 | fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter), | |
210 | count[0], count[1], count[2]); | |
211 | } | |
212 | ||
be1ac0d8 IM |
213 | /* |
214 | * Save the full runtime - to allow normalization during printout: | |
215 | */ | |
daec78a0 | 216 | if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) |
f5b4a9c3 | 217 | update_stats(&runtime_nsecs_stats[0], count[0]); |
daec78a0 | 218 | if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) |
f5b4a9c3 | 219 | update_stats(&runtime_cycles_stats[0], count[0]); |
daec78a0 | 220 | if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) |
f5b4a9c3 | 221 | update_stats(&runtime_branches_stats[0], count[0]); |
c52b12ed ACM |
222 | |
223 | return 0; | |
f5b4a9c3 SE |
224 | } |
225 | ||
226 | /* | |
227 | * Read out the results of a single counter: | |
228 | * do not aggregate counts across CPUs in system-wide mode | |
229 | */ | |
c52b12ed | 230 | static int read_counter(struct perf_evsel *counter) |
f5b4a9c3 | 231 | { |
c52b12ed | 232 | u64 *count; |
f5b4a9c3 | 233 | int cpu; |
f5b4a9c3 | 234 | |
60d567e2 | 235 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
c52b12ed ACM |
236 | if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0) |
237 | return -1; | |
f5b4a9c3 | 238 | |
c52b12ed | 239 | count = counter->counts->cpu[cpu].values; |
f5b4a9c3 | 240 | |
daec78a0 | 241 | if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK)) |
f5b4a9c3 | 242 | update_stats(&runtime_nsecs_stats[cpu], count[0]); |
daec78a0 | 243 | if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES)) |
f5b4a9c3 | 244 | update_stats(&runtime_cycles_stats[cpu], count[0]); |
daec78a0 | 245 | if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS)) |
f5b4a9c3 SE |
246 | update_stats(&runtime_branches_stats[cpu], count[0]); |
247 | } | |
c52b12ed ACM |
248 | |
249 | return 0; | |
2996f5dd IM |
250 | } |
251 | ||
f37a291c | 252 | static int run_perf_stat(int argc __used, const char **argv) |
42202dd5 IM |
253 | { |
254 | unsigned long long t0, t1; | |
69aad6f1 | 255 | struct perf_evsel *counter; |
42202dd5 | 256 | int status = 0; |
051ae7f7 | 257 | int child_ready_pipe[2], go_pipe[2]; |
6be2850e | 258 | const bool forks = (argc > 0); |
051ae7f7 | 259 | char buf; |
42202dd5 | 260 | |
60666c63 | 261 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
051ae7f7 PM |
262 | perror("failed to create pipes"); |
263 | exit(1); | |
264 | } | |
265 | ||
60666c63 | 266 | if (forks) { |
6be2850e | 267 | if ((child_pid = fork()) < 0) |
60666c63 LW |
268 | perror("failed to fork"); |
269 | ||
6be2850e | 270 | if (!child_pid) { |
60666c63 LW |
271 | close(child_ready_pipe[0]); |
272 | close(go_pipe[1]); | |
273 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
274 | ||
275 | /* | |
276 | * Do a dummy execvp to get the PLT entry resolved, | |
277 | * so we avoid the resolver overhead on the real | |
278 | * execvp call. | |
279 | */ | |
280 | execvp("", (char **)argv); | |
281 | ||
282 | /* | |
283 | * Tell the parent we're ready to go | |
284 | */ | |
285 | close(child_ready_pipe[1]); | |
286 | ||
287 | /* | |
288 | * Wait until the parent tells us to go. | |
289 | */ | |
290 | if (read(go_pipe[0], &buf, 1) == -1) | |
291 | perror("unable to read pipe"); | |
292 | ||
293 | execvp(argv[0], (char **)argv); | |
294 | ||
295 | perror(argv[0]); | |
296 | exit(-1); | |
297 | } | |
051ae7f7 | 298 | |
d6d901c2 | 299 | if (target_tid == -1 && target_pid == -1 && !system_wide) |
5c98d466 | 300 | threads->map[0] = child_pid; |
d6d901c2 | 301 | |
051ae7f7 | 302 | /* |
60666c63 | 303 | * Wait for the child to be ready to exec. |
051ae7f7 PM |
304 | */ |
305 | close(child_ready_pipe[1]); | |
60666c63 LW |
306 | close(go_pipe[0]); |
307 | if (read(child_ready_pipe[0], &buf, 1) == -1) | |
a92bef0f | 308 | perror("unable to read pipe"); |
60666c63 | 309 | close(child_ready_pipe[0]); |
051ae7f7 PM |
310 | } |
311 | ||
48290609 ACM |
312 | list_for_each_entry(counter, &evsel_list, node) { |
313 | if (create_perf_stat_counter(counter) < 0) { | |
314 | if (errno == -EPERM || errno == -EACCES) { | |
315 | error("You may not have permission to collect %sstats.\n" | |
316 | "\t Consider tweaking" | |
317 | " /proc/sys/kernel/perf_event_paranoid or running as root.", | |
318 | system_wide ? "system-wide " : ""); | |
319 | } else { | |
320 | error("open_counter returned with %d (%s). " | |
321 | "/bin/dmesg may provide additional information.\n", | |
322 | errno, strerror(errno)); | |
323 | } | |
324 | if (child_pid != -1) | |
325 | kill(child_pid, SIGTERM); | |
326 | die("Not all events could be opened.\n"); | |
327 | return -1; | |
328 | } | |
084ab9f8 | 329 | } |
42202dd5 IM |
330 | |
331 | /* | |
332 | * Enable counters and exec the command: | |
333 | */ | |
334 | t0 = rdclock(); | |
42202dd5 | 335 | |
60666c63 LW |
336 | if (forks) { |
337 | close(go_pipe[1]); | |
338 | wait(&status); | |
339 | } else { | |
6be2850e | 340 | while(!done) sleep(1); |
60666c63 | 341 | } |
42202dd5 | 342 | |
42202dd5 IM |
343 | t1 = rdclock(); |
344 | ||
9e9772c4 | 345 | update_stats(&walltime_nsecs_stats, t1 - t0); |
42202dd5 | 346 | |
f5b4a9c3 | 347 | if (no_aggr) { |
c52b12ed | 348 | list_for_each_entry(counter, &evsel_list, node) { |
f5b4a9c3 | 349 | read_counter(counter); |
60d567e2 | 350 | perf_evsel__close_fd(counter, cpus->nr, 1); |
c52b12ed | 351 | } |
f5b4a9c3 | 352 | } else { |
c52b12ed | 353 | list_for_each_entry(counter, &evsel_list, node) { |
f5b4a9c3 | 354 | read_counter_aggr(counter); |
5c98d466 | 355 | perf_evsel__close_fd(counter, cpus->nr, threads->nr); |
c52b12ed | 356 | } |
f5b4a9c3 | 357 | } |
c52b12ed | 358 | |
42202dd5 IM |
359 | return WEXITSTATUS(status); |
360 | } | |
361 | ||
69aad6f1 | 362 | static void print_noise(struct perf_evsel *evsel, double avg) |
42202dd5 | 363 | { |
69aad6f1 ACM |
364 | struct perf_stat *ps; |
365 | ||
849abde9 PZ |
366 | if (run_count == 1) |
367 | return; | |
368 | ||
69aad6f1 | 369 | ps = evsel->priv; |
849abde9 | 370 | fprintf(stderr, " ( +- %7.3f%% )", |
69aad6f1 | 371 | 100 * stddev_stats(&ps->res_stats[0]) / avg); |
42202dd5 IM |
372 | } |
373 | ||
daec78a0 | 374 | static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg) |
44175b6f | 375 | { |
506d4bc8 | 376 | double msecs = avg / 1e6; |
d7470b6a SE |
377 | char cpustr[16] = { '\0', }; |
378 | const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s"; | |
44175b6f | 379 | |
f5b4a9c3 | 380 | if (no_aggr) |
d7470b6a SE |
381 | sprintf(cpustr, "CPU%*d%s", |
382 | csv_output ? 0 : -4, | |
60d567e2 | 383 | cpus->map[cpu], csv_sep); |
d7470b6a | 384 | |
daec78a0 | 385 | fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel)); |
d7470b6a SE |
386 | |
387 | if (csv_output) | |
388 | return; | |
44175b6f | 389 | |
daec78a0 | 390 | if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK)) |
506d4bc8 PZ |
391 | fprintf(stderr, " # %10.3f CPUs ", |
392 | avg / avg_stats(&walltime_nsecs_stats)); | |
44175b6f IM |
393 | } |
394 | ||
daec78a0 | 395 | static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) |
44175b6f | 396 | { |
c7f7fea3 | 397 | double total, ratio = 0.0; |
f5b4a9c3 | 398 | char cpustr[16] = { '\0', }; |
d7470b6a SE |
399 | const char *fmt; |
400 | ||
401 | if (csv_output) | |
402 | fmt = "%s%.0f%s%s"; | |
403 | else if (big_num) | |
404 | fmt = "%s%'18.0f%s%-24s"; | |
405 | else | |
406 | fmt = "%s%18.0f%s%-24s"; | |
f5b4a9c3 SE |
407 | |
408 | if (no_aggr) | |
d7470b6a SE |
409 | sprintf(cpustr, "CPU%*d%s", |
410 | csv_output ? 0 : -4, | |
60d567e2 | 411 | cpus->map[cpu], csv_sep); |
f5b4a9c3 SE |
412 | else |
413 | cpu = 0; | |
c7f7fea3 | 414 | |
daec78a0 | 415 | fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel)); |
d7470b6a SE |
416 | |
417 | if (csv_output) | |
418 | return; | |
44175b6f | 419 | |
daec78a0 | 420 | if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) { |
f5b4a9c3 | 421 | total = avg_stats(&runtime_cycles_stats[cpu]); |
c7f7fea3 IM |
422 | |
423 | if (total) | |
424 | ratio = avg / total; | |
425 | ||
426 | fprintf(stderr, " # %10.3f IPC ", ratio); | |
daec78a0 | 427 | } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) && |
f5b4a9c3 SE |
428 | runtime_branches_stats[cpu].n != 0) { |
429 | total = avg_stats(&runtime_branches_stats[cpu]); | |
11018201 AB |
430 | |
431 | if (total) | |
432 | ratio = avg * 100 / total; | |
433 | ||
dd86e72a | 434 | fprintf(stderr, " # %10.3f %% ", ratio); |
11018201 | 435 | |
f5b4a9c3 SE |
436 | } else if (runtime_nsecs_stats[cpu].n != 0) { |
437 | total = avg_stats(&runtime_nsecs_stats[cpu]); | |
c7f7fea3 IM |
438 | |
439 | if (total) | |
440 | ratio = 1000.0 * avg / total; | |
441 | ||
442 | fprintf(stderr, " # %10.3f M/sec", ratio); | |
44175b6f | 443 | } |
44175b6f IM |
444 | } |
445 | ||
2996f5dd IM |
446 | /* |
447 | * Print out the results of a single counter: | |
f5b4a9c3 | 448 | * aggregated counts in system-wide mode |
2996f5dd | 449 | */ |
69aad6f1 | 450 | static void print_counter_aggr(struct perf_evsel *counter) |
2996f5dd | 451 | { |
69aad6f1 ACM |
452 | struct perf_stat *ps = counter->priv; |
453 | double avg = avg_stats(&ps->res_stats[0]); | |
c52b12ed | 454 | int scaled = counter->counts->scaled; |
2996f5dd | 455 | |
2996f5dd | 456 | if (scaled == -1) { |
d7470b6a SE |
457 | fprintf(stderr, "%*s%s%-24s\n", |
458 | csv_output ? 0 : 18, | |
459 | "<not counted>", csv_sep, event_name(counter)); | |
2996f5dd IM |
460 | return; |
461 | } | |
c04f5e5d | 462 | |
44175b6f | 463 | if (nsec_counter(counter)) |
f5b4a9c3 | 464 | nsec_printout(-1, counter, avg); |
44175b6f | 465 | else |
f5b4a9c3 | 466 | abs_printout(-1, counter, avg); |
849abde9 | 467 | |
d7470b6a SE |
468 | if (csv_output) { |
469 | fputc('\n', stderr); | |
470 | return; | |
471 | } | |
472 | ||
849abde9 | 473 | print_noise(counter, avg); |
506d4bc8 PZ |
474 | |
475 | if (scaled) { | |
476 | double avg_enabled, avg_running; | |
477 | ||
69aad6f1 ACM |
478 | avg_enabled = avg_stats(&ps->res_stats[1]); |
479 | avg_running = avg_stats(&ps->res_stats[2]); | |
d7c29318 | 480 | |
210ad39f | 481 | fprintf(stderr, " (scaled from %.2f%%)", |
506d4bc8 PZ |
482 | 100 * avg_running / avg_enabled); |
483 | } | |
44175b6f | 484 | |
c04f5e5d IM |
485 | fprintf(stderr, "\n"); |
486 | } | |
487 | ||
f5b4a9c3 SE |
488 | /* |
489 | * Print out the results of a single counter: | |
490 | * does not use aggregated count in system-wide | |
491 | */ | |
69aad6f1 | 492 | static void print_counter(struct perf_evsel *counter) |
f5b4a9c3 SE |
493 | { |
494 | u64 ena, run, val; | |
495 | int cpu; | |
496 | ||
60d567e2 | 497 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
c52b12ed ACM |
498 | val = counter->counts->cpu[cpu].val; |
499 | ena = counter->counts->cpu[cpu].ena; | |
500 | run = counter->counts->cpu[cpu].run; | |
f5b4a9c3 | 501 | if (run == 0 || ena == 0) { |
d7470b6a SE |
502 | fprintf(stderr, "CPU%*d%s%*s%s%-24s", |
503 | csv_output ? 0 : -4, | |
60d567e2 | 504 | cpus->map[cpu], csv_sep, |
d7470b6a SE |
505 | csv_output ? 0 : 18, |
506 | "<not counted>", csv_sep, | |
507 | event_name(counter)); | |
f5b4a9c3 SE |
508 | |
509 | fprintf(stderr, "\n"); | |
510 | continue; | |
511 | } | |
512 | ||
513 | if (nsec_counter(counter)) | |
514 | nsec_printout(cpu, counter, val); | |
515 | else | |
516 | abs_printout(cpu, counter, val); | |
517 | ||
d7470b6a SE |
518 | if (!csv_output) { |
519 | print_noise(counter, 1.0); | |
f5b4a9c3 | 520 | |
d7470b6a SE |
521 | if (run != ena) { |
522 | fprintf(stderr, " (scaled from %.2f%%)", | |
f5b4a9c3 | 523 | 100.0 * run / ena); |
d7470b6a | 524 | } |
f5b4a9c3 SE |
525 | } |
526 | fprintf(stderr, "\n"); | |
527 | } | |
528 | } | |
529 | ||
42202dd5 IM |
530 | static void print_stat(int argc, const char **argv) |
531 | { | |
69aad6f1 ACM |
532 | struct perf_evsel *counter; |
533 | int i; | |
42202dd5 | 534 | |
ddcacfa0 IM |
535 | fflush(stdout); |
536 | ||
d7470b6a SE |
537 | if (!csv_output) { |
538 | fprintf(stderr, "\n"); | |
539 | fprintf(stderr, " Performance counter stats for "); | |
540 | if(target_pid == -1 && target_tid == -1) { | |
541 | fprintf(stderr, "\'%s", argv[0]); | |
542 | for (i = 1; i < argc; i++) | |
543 | fprintf(stderr, " %s", argv[i]); | |
544 | } else if (target_pid != -1) | |
545 | fprintf(stderr, "process id \'%d", target_pid); | |
546 | else | |
547 | fprintf(stderr, "thread id \'%d", target_tid); | |
44db76c8 | 548 | |
d7470b6a SE |
549 | fprintf(stderr, "\'"); |
550 | if (run_count > 1) | |
551 | fprintf(stderr, " (%d runs)", run_count); | |
552 | fprintf(stderr, ":\n\n"); | |
553 | } | |
2996f5dd | 554 | |
f5b4a9c3 | 555 | if (no_aggr) { |
69aad6f1 | 556 | list_for_each_entry(counter, &evsel_list, node) |
f5b4a9c3 SE |
557 | print_counter(counter); |
558 | } else { | |
69aad6f1 | 559 | list_for_each_entry(counter, &evsel_list, node) |
f5b4a9c3 SE |
560 | print_counter_aggr(counter); |
561 | } | |
ddcacfa0 | 562 | |
d7470b6a SE |
563 | if (!csv_output) { |
564 | fprintf(stderr, "\n"); | |
565 | fprintf(stderr, " %18.9f seconds time elapsed", | |
566 | avg_stats(&walltime_nsecs_stats)/1e9); | |
567 | if (run_count > 1) { | |
568 | fprintf(stderr, " ( +- %7.3f%% )", | |
506d4bc8 PZ |
569 | 100*stddev_stats(&walltime_nsecs_stats) / |
570 | avg_stats(&walltime_nsecs_stats)); | |
d7470b6a SE |
571 | } |
572 | fprintf(stderr, "\n\n"); | |
566747e6 | 573 | } |
ddcacfa0 IM |
574 | } |
575 | ||
f7b7c26e PZ |
576 | static volatile int signr = -1; |
577 | ||
5242519b | 578 | static void skip_signal(int signo) |
ddcacfa0 | 579 | { |
6be2850e | 580 | if(child_pid == -1) |
60666c63 LW |
581 | done = 1; |
582 | ||
f7b7c26e PZ |
583 | signr = signo; |
584 | } | |
585 | ||
586 | static void sig_atexit(void) | |
587 | { | |
933da83a CW |
588 | if (child_pid != -1) |
589 | kill(child_pid, SIGTERM); | |
590 | ||
f7b7c26e PZ |
591 | if (signr == -1) |
592 | return; | |
593 | ||
594 | signal(signr, SIG_DFL); | |
595 | kill(getpid(), signr); | |
5242519b IM |
596 | } |
597 | ||
598 | static const char * const stat_usage[] = { | |
60666c63 | 599 | "perf stat [<options>] [<command>]", |
5242519b IM |
600 | NULL |
601 | }; | |
602 | ||
d7470b6a SE |
603 | static int stat__set_big_num(const struct option *opt __used, |
604 | const char *s __used, int unset) | |
605 | { | |
606 | big_num_opt = unset ? 0 : 1; | |
607 | return 0; | |
608 | } | |
609 | ||
5242519b IM |
610 | static const struct option options[] = { |
611 | OPT_CALLBACK('e', "event", NULL, "event", | |
86847b62 TG |
612 | "event selector. use 'perf list' to list available events", |
613 | parse_events), | |
2e6cdf99 SE |
614 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
615 | "child tasks do not inherit counters"), | |
5242519b | 616 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
617 | "stat events on existing process id"), |
618 | OPT_INTEGER('t', "tid", &target_tid, | |
619 | "stat events on existing thread id"), | |
5242519b | 620 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
3d632595 | 621 | "system-wide collection from all CPUs"), |
b26bc5a7 | 622 | OPT_BOOLEAN('c', "scale", &scale, |
3d632595 | 623 | "scale/normalize counters"), |
c0555642 | 624 | OPT_INCR('v', "verbose", &verbose, |
743ee1f8 | 625 | "be more verbose (show counter open errors, etc)"), |
42202dd5 IM |
626 | OPT_INTEGER('r', "repeat", &run_count, |
627 | "repeat command and print average + stddev (max: 100)"), | |
0cfb7a13 IM |
628 | OPT_BOOLEAN('n', "null", &null_run, |
629 | "null run - dont start any counters"), | |
d7470b6a SE |
630 | OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, |
631 | "print large numbers with thousands\' separators", | |
632 | stat__set_big_num), | |
c45c6ea2 SE |
633 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
634 | "list of cpus to monitor in system-wide"), | |
f5b4a9c3 SE |
635 | OPT_BOOLEAN('A', "no-aggr", &no_aggr, |
636 | "disable CPU count aggregation"), | |
d7470b6a SE |
637 | OPT_STRING('x', "field-separator", &csv_sep, "separator", |
638 | "print counts with custom separator"), | |
5242519b IM |
639 | OPT_END() |
640 | }; | |
641 | ||
f37a291c | 642 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
5242519b | 643 | { |
69aad6f1 ACM |
644 | struct perf_evsel *pos; |
645 | int status = -ENOMEM; | |
42202dd5 | 646 | |
5af52b51 SE |
647 | setlocale(LC_ALL, ""); |
648 | ||
a0541234 AB |
649 | argc = parse_options(argc, argv, options, stat_usage, |
650 | PARSE_OPT_STOP_AT_NON_OPTION); | |
d7470b6a SE |
651 | |
652 | if (csv_sep) | |
653 | csv_output = true; | |
654 | else | |
655 | csv_sep = DEFAULT_SEPARATOR; | |
656 | ||
657 | /* | |
658 | * let the spreadsheet do the pretty-printing | |
659 | */ | |
660 | if (csv_output) { | |
661 | /* User explicitely passed -B? */ | |
662 | if (big_num_opt == 1) { | |
663 | fprintf(stderr, "-B option not supported with -x\n"); | |
664 | usage_with_options(stat_usage, options); | |
665 | } else /* Nope, so disable big number formatting */ | |
666 | big_num = false; | |
667 | } else if (big_num_opt == 0) /* User passed --no-big-num */ | |
668 | big_num = false; | |
669 | ||
d6d901c2 | 670 | if (!argc && target_pid == -1 && target_tid == -1) |
5242519b | 671 | usage_with_options(stat_usage, options); |
9e9772c4 | 672 | if (run_count <= 0) |
42202dd5 | 673 | usage_with_options(stat_usage, options); |
ddcacfa0 | 674 | |
f5b4a9c3 SE |
675 | /* no_aggr is for system-wide only */ |
676 | if (no_aggr && !system_wide) | |
677 | usage_with_options(stat_usage, options); | |
678 | ||
c3043569 JSR |
679 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
680 | if (!null_run && !nr_counters) { | |
69aad6f1 ACM |
681 | size_t c; |
682 | ||
c3043569 | 683 | nr_counters = ARRAY_SIZE(default_attrs); |
69aad6f1 ACM |
684 | |
685 | for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) { | |
686 | pos = perf_evsel__new(default_attrs[c].type, | |
687 | default_attrs[c].config, | |
688 | nr_counters); | |
689 | if (pos == NULL) | |
690 | goto out; | |
691 | list_add(&pos->node, &evsel_list); | |
692 | } | |
c3043569 | 693 | } |
ddcacfa0 | 694 | |
5c98d466 ACM |
695 | if (target_pid != -1) |
696 | target_tid = target_pid; | |
697 | ||
698 | threads = thread_map__new(target_pid, target_tid); | |
699 | if (threads == NULL) { | |
700 | pr_err("Problems finding threads of monitor\n"); | |
701 | usage_with_options(stat_usage, options); | |
702 | } | |
703 | ||
a12b51c4 | 704 | if (system_wide) |
60d567e2 | 705 | cpus = cpu_map__new(cpu_list); |
a12b51c4 | 706 | else |
60d567e2 | 707 | cpus = cpu_map__dummy_new(); |
ddcacfa0 | 708 | |
60d567e2 ACM |
709 | if (cpus == NULL) { |
710 | perror("failed to parse CPUs map"); | |
c45c6ea2 | 711 | usage_with_options(stat_usage, options); |
60d567e2 ACM |
712 | return -1; |
713 | } | |
c45c6ea2 | 714 | |
69aad6f1 | 715 | list_for_each_entry(pos, &evsel_list, node) { |
c52b12ed | 716 | if (perf_evsel__alloc_stat_priv(pos) < 0 || |
60d567e2 | 717 | perf_evsel__alloc_counts(pos, cpus->nr) < 0 || |
5c98d466 | 718 | perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0) |
69aad6f1 | 719 | goto out_free_fd; |
d6d901c2 ZY |
720 | } |
721 | ||
58d7e993 IM |
722 | /* |
723 | * We dont want to block the signals - that would cause | |
724 | * child tasks to inherit that and Ctrl-C would not work. | |
725 | * What we want is for Ctrl-C to work in the exec()-ed | |
726 | * task, but being ignored by perf stat itself: | |
727 | */ | |
f7b7c26e | 728 | atexit(sig_atexit); |
58d7e993 IM |
729 | signal(SIGINT, skip_signal); |
730 | signal(SIGALRM, skip_signal); | |
731 | signal(SIGABRT, skip_signal); | |
732 | ||
42202dd5 IM |
733 | status = 0; |
734 | for (run_idx = 0; run_idx < run_count; run_idx++) { | |
735 | if (run_count != 1 && verbose) | |
3d632595 | 736 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
42202dd5 IM |
737 | status = run_perf_stat(argc, argv); |
738 | } | |
739 | ||
084ab9f8 ACM |
740 | if (status != -1) |
741 | print_stat(argc, argv); | |
69aad6f1 | 742 | out_free_fd: |
70d544d0 | 743 | list_for_each_entry(pos, &evsel_list, node) |
69aad6f1 | 744 | perf_evsel__free_stat_priv(pos); |
69aad6f1 | 745 | out: |
5c98d466 ACM |
746 | thread_map__delete(threads); |
747 | threads = NULL; | |
42202dd5 | 748 | return status; |
ddcacfa0 | 749 | } |