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" | |
ddcacfa0 | 45 | |
ddcacfa0 | 46 | #include <sys/prctl.h> |
42202dd5 | 47 | #include <math.h> |
16c8a109 | 48 | |
c3043569 | 49 | static struct perf_counter_attr default_attrs[] = { |
ddcacfa0 | 50 | |
f4dbfa8f PZ |
51 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
52 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES}, | |
53 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, | |
54 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, | |
55 | ||
56 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, | |
57 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, | |
58 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, | |
59 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, | |
60 | ||
ddcacfa0 | 61 | }; |
5242519b | 62 | |
3d632595 JSR |
63 | #define MAX_RUN 100 |
64 | ||
a21ca2ca | 65 | static int system_wide = 0; |
743ee1f8 | 66 | static int verbose = 0; |
ddcacfa0 | 67 | static int nr_cpus = 0; |
3d632595 | 68 | static int run_idx = 0; |
ddcacfa0 | 69 | |
3d632595 JSR |
70 | static int run_count = 1; |
71 | static int inherit = 1; | |
66cf7829 | 72 | static int scale = 1; |
3d632595 | 73 | static int target_pid = -1; |
0cfb7a13 | 74 | static int null_run = 0; |
ddcacfa0 | 75 | |
3d632595 | 76 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
42202dd5 | 77 | |
9cffa8d5 PM |
78 | static u64 runtime_nsecs[MAX_RUN]; |
79 | static u64 walltime_nsecs[MAX_RUN]; | |
80 | static u64 runtime_cycles[MAX_RUN]; | |
42202dd5 | 81 | |
3d632595 JSR |
82 | static u64 event_res[MAX_RUN][MAX_COUNTERS][3]; |
83 | static u64 event_scaled[MAX_RUN][MAX_COUNTERS]; | |
84 | ||
9cffa8d5 PM |
85 | static u64 event_res_avg[MAX_COUNTERS][3]; |
86 | static u64 event_res_noise[MAX_COUNTERS][3]; | |
42202dd5 | 87 | |
9cffa8d5 | 88 | static u64 event_scaled_avg[MAX_COUNTERS]; |
42202dd5 | 89 | |
9cffa8d5 PM |
90 | static u64 runtime_nsecs_avg; |
91 | static u64 runtime_nsecs_noise; | |
42202dd5 | 92 | |
9cffa8d5 PM |
93 | static u64 walltime_nsecs_avg; |
94 | static u64 walltime_nsecs_noise; | |
42202dd5 | 95 | |
9cffa8d5 PM |
96 | static u64 runtime_cycles_avg; |
97 | static u64 runtime_cycles_noise; | |
be1ac0d8 | 98 | |
cca03c0a JSR |
99 | #define ERR_PERF_OPEN \ |
100 | "Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n" | |
101 | ||
051ae7f7 | 102 | static void create_perf_stat_counter(int counter, int pid) |
ddcacfa0 | 103 | { |
a21ca2ca | 104 | struct perf_counter_attr *attr = attrs + counter; |
16c8a109 | 105 | |
ddcacfa0 | 106 | if (scale) |
a21ca2ca IM |
107 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
108 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
ddcacfa0 IM |
109 | |
110 | if (system_wide) { | |
111 | int cpu; | |
cca03c0a | 112 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
a21ca2ca | 113 | fd[cpu][counter] = sys_perf_counter_open(attr, -1, cpu, -1, 0); |
cca03c0a JSR |
114 | if (fd[cpu][counter] < 0 && verbose) |
115 | fprintf(stderr, ERR_PERF_OPEN, counter, | |
116 | fd[cpu][counter], strerror(errno)); | |
ddcacfa0 IM |
117 | } |
118 | } else { | |
57e7986e PM |
119 | attr->inherit = inherit; |
120 | attr->disabled = 1; | |
121 | attr->enable_on_exec = 1; | |
ddcacfa0 | 122 | |
051ae7f7 | 123 | fd[0][counter] = sys_perf_counter_open(attr, pid, -1, -1, 0); |
cca03c0a JSR |
124 | if (fd[0][counter] < 0 && verbose) |
125 | fprintf(stderr, ERR_PERF_OPEN, counter, | |
126 | fd[0][counter], strerror(errno)); | |
ddcacfa0 IM |
127 | } |
128 | } | |
129 | ||
c04f5e5d IM |
130 | /* |
131 | * Does the counter have nsecs as a unit? | |
132 | */ | |
133 | static inline int nsec_counter(int counter) | |
134 | { | |
a21ca2ca IM |
135 | if (attrs[counter].type != PERF_TYPE_SOFTWARE) |
136 | return 0; | |
137 | ||
f4dbfa8f | 138 | if (attrs[counter].config == PERF_COUNT_SW_CPU_CLOCK) |
c04f5e5d | 139 | return 1; |
a21ca2ca | 140 | |
f4dbfa8f | 141 | if (attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) |
c04f5e5d IM |
142 | return 1; |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | /* | |
2996f5dd | 148 | * Read out the results of a single counter: |
c04f5e5d | 149 | */ |
2996f5dd | 150 | static void read_counter(int counter) |
c04f5e5d | 151 | { |
9cffa8d5 | 152 | u64 *count, single_count[3]; |
c04f5e5d IM |
153 | ssize_t res; |
154 | int cpu, nv; | |
155 | int scaled; | |
156 | ||
42202dd5 | 157 | count = event_res[run_idx][counter]; |
2996f5dd | 158 | |
c04f5e5d | 159 | count[0] = count[1] = count[2] = 0; |
2996f5dd | 160 | |
c04f5e5d | 161 | nv = scale ? 3 : 1; |
cca03c0a | 162 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
743ee1f8 IM |
163 | if (fd[cpu][counter] < 0) |
164 | continue; | |
165 | ||
9cffa8d5 PM |
166 | res = read(fd[cpu][counter], single_count, nv * sizeof(u64)); |
167 | assert(res == nv * sizeof(u64)); | |
42202dd5 IM |
168 | close(fd[cpu][counter]); |
169 | fd[cpu][counter] = -1; | |
c04f5e5d IM |
170 | |
171 | count[0] += single_count[0]; | |
172 | if (scale) { | |
173 | count[1] += single_count[1]; | |
174 | count[2] += single_count[2]; | |
175 | } | |
176 | } | |
177 | ||
178 | scaled = 0; | |
179 | if (scale) { | |
180 | if (count[2] == 0) { | |
42202dd5 | 181 | event_scaled[run_idx][counter] = -1; |
2996f5dd | 182 | count[0] = 0; |
c04f5e5d IM |
183 | return; |
184 | } | |
2996f5dd | 185 | |
c04f5e5d | 186 | if (count[2] < count[1]) { |
42202dd5 | 187 | event_scaled[run_idx][counter] = 1; |
c04f5e5d IM |
188 | count[0] = (unsigned long long) |
189 | ((double)count[0] * count[1] / count[2] + 0.5); | |
190 | } | |
191 | } | |
be1ac0d8 IM |
192 | /* |
193 | * Save the full runtime - to allow normalization during printout: | |
194 | */ | |
a21ca2ca | 195 | if (attrs[counter].type == PERF_TYPE_SOFTWARE && |
f4dbfa8f | 196 | attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) |
42202dd5 | 197 | runtime_nsecs[run_idx] = count[0]; |
e779898a | 198 | if (attrs[counter].type == PERF_TYPE_HARDWARE && |
f4dbfa8f | 199 | attrs[counter].config == PERF_COUNT_HW_CPU_CYCLES) |
42202dd5 | 200 | runtime_cycles[run_idx] = count[0]; |
2996f5dd IM |
201 | } |
202 | ||
42202dd5 IM |
203 | static int run_perf_stat(int argc, const char **argv) |
204 | { | |
205 | unsigned long long t0, t1; | |
206 | int status = 0; | |
207 | int counter; | |
208 | int pid; | |
051ae7f7 PM |
209 | int child_ready_pipe[2], go_pipe[2]; |
210 | char buf; | |
42202dd5 IM |
211 | |
212 | if (!system_wide) | |
213 | nr_cpus = 1; | |
214 | ||
051ae7f7 PM |
215 | if (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0) { |
216 | perror("failed to create pipes"); | |
217 | exit(1); | |
218 | } | |
219 | ||
220 | if ((pid = fork()) < 0) | |
221 | perror("failed to fork"); | |
222 | ||
223 | if (!pid) { | |
224 | close(child_ready_pipe[0]); | |
225 | close(go_pipe[1]); | |
226 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
227 | ||
228 | /* | |
229 | * Do a dummy execvp to get the PLT entry resolved, | |
230 | * so we avoid the resolver overhead on the real | |
231 | * execvp call. | |
232 | */ | |
233 | execvp("", (char **)argv); | |
234 | ||
235 | /* | |
236 | * Tell the parent we're ready to go | |
237 | */ | |
238 | close(child_ready_pipe[1]); | |
239 | ||
240 | /* | |
241 | * Wait until the parent tells us to go. | |
242 | */ | |
243 | read(go_pipe[0], &buf, 1); | |
244 | ||
245 | execvp(argv[0], (char **)argv); | |
246 | ||
247 | perror(argv[0]); | |
248 | exit(-1); | |
249 | } | |
250 | ||
251 | /* | |
252 | * Wait for the child to be ready to exec. | |
253 | */ | |
254 | close(child_ready_pipe[1]); | |
255 | close(go_pipe[0]); | |
256 | read(child_ready_pipe[0], &buf, 1); | |
257 | close(child_ready_pipe[0]); | |
258 | ||
42202dd5 | 259 | for (counter = 0; counter < nr_counters; counter++) |
051ae7f7 | 260 | create_perf_stat_counter(counter, pid); |
42202dd5 IM |
261 | |
262 | /* | |
263 | * Enable counters and exec the command: | |
264 | */ | |
265 | t0 = rdclock(); | |
42202dd5 | 266 | |
051ae7f7 | 267 | close(go_pipe[1]); |
42202dd5 IM |
268 | wait(&status); |
269 | ||
42202dd5 IM |
270 | t1 = rdclock(); |
271 | ||
272 | walltime_nsecs[run_idx] = t1 - t0; | |
273 | ||
274 | for (counter = 0; counter < nr_counters; counter++) | |
275 | read_counter(counter); | |
276 | ||
277 | return WEXITSTATUS(status); | |
278 | } | |
279 | ||
9cffa8d5 | 280 | static void print_noise(u64 *count, u64 *noise) |
42202dd5 IM |
281 | { |
282 | if (run_count > 1) | |
283 | fprintf(stderr, " ( +- %7.3f%% )", | |
284 | (double)noise[0]/(count[0]+1)*100.0); | |
285 | } | |
286 | ||
9cffa8d5 | 287 | static void nsec_printout(int counter, u64 *count, u64 *noise) |
44175b6f IM |
288 | { |
289 | double msecs = (double)count[0] / 1000000; | |
290 | ||
6e750a8f | 291 | fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter)); |
44175b6f IM |
292 | |
293 | if (attrs[counter].type == PERF_TYPE_SOFTWARE && | |
294 | attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) { | |
295 | ||
42202dd5 IM |
296 | if (walltime_nsecs_avg) |
297 | fprintf(stderr, " # %10.3f CPUs ", | |
298 | (double)count[0] / (double)walltime_nsecs_avg); | |
44175b6f | 299 | } |
42202dd5 | 300 | print_noise(count, noise); |
44175b6f IM |
301 | } |
302 | ||
9cffa8d5 | 303 | static void abs_printout(int counter, u64 *count, u64 *noise) |
44175b6f | 304 | { |
6e750a8f | 305 | fprintf(stderr, " %14Ld %-24s", count[0], event_name(counter)); |
44175b6f | 306 | |
42202dd5 | 307 | if (runtime_cycles_avg && |
44175b6f IM |
308 | attrs[counter].type == PERF_TYPE_HARDWARE && |
309 | attrs[counter].config == PERF_COUNT_HW_INSTRUCTIONS) { | |
310 | ||
42202dd5 IM |
311 | fprintf(stderr, " # %10.3f IPC ", |
312 | (double)count[0] / (double)runtime_cycles_avg); | |
313 | } else { | |
314 | if (runtime_nsecs_avg) { | |
315 | fprintf(stderr, " # %10.3f M/sec", | |
316 | (double)count[0]/runtime_nsecs_avg*1000.0); | |
317 | } | |
44175b6f | 318 | } |
42202dd5 | 319 | print_noise(count, noise); |
44175b6f IM |
320 | } |
321 | ||
2996f5dd IM |
322 | /* |
323 | * Print out the results of a single counter: | |
324 | */ | |
325 | static void print_counter(int counter) | |
326 | { | |
9cffa8d5 | 327 | u64 *count, *noise; |
2996f5dd IM |
328 | int scaled; |
329 | ||
42202dd5 IM |
330 | count = event_res_avg[counter]; |
331 | noise = event_res_noise[counter]; | |
332 | scaled = event_scaled_avg[counter]; | |
2996f5dd IM |
333 | |
334 | if (scaled == -1) { | |
6e750a8f | 335 | fprintf(stderr, " %14s %-24s\n", |
2996f5dd IM |
336 | "<not counted>", event_name(counter)); |
337 | return; | |
338 | } | |
c04f5e5d | 339 | |
44175b6f | 340 | if (nsec_counter(counter)) |
42202dd5 | 341 | nsec_printout(counter, count, noise); |
44175b6f | 342 | else |
42202dd5 | 343 | abs_printout(counter, count, noise); |
d7c29318 | 344 | |
c04f5e5d | 345 | if (scaled) |
210ad39f IM |
346 | fprintf(stderr, " (scaled from %.2f%%)", |
347 | (double) count[2] / count[1] * 100); | |
44175b6f | 348 | |
c04f5e5d IM |
349 | fprintf(stderr, "\n"); |
350 | } | |
351 | ||
42202dd5 | 352 | /* |
ef281a19 | 353 | * normalize_noise noise values down to stddev: |
42202dd5 | 354 | */ |
9cffa8d5 | 355 | static void normalize_noise(u64 *val) |
ddcacfa0 | 356 | { |
42202dd5 | 357 | double res; |
ddcacfa0 | 358 | |
42202dd5 | 359 | res = (double)*val / (run_count * sqrt((double)run_count)); |
ddcacfa0 | 360 | |
9cffa8d5 | 361 | *val = (u64)res; |
42202dd5 | 362 | } |
ddcacfa0 | 363 | |
9cffa8d5 | 364 | static void update_avg(const char *name, int idx, u64 *avg, u64 *val) |
ef281a19 IM |
365 | { |
366 | *avg += *val; | |
367 | ||
368 | if (verbose > 1) | |
369 | fprintf(stderr, "debug: %20s[%d]: %Ld\n", name, idx, *val); | |
370 | } | |
42202dd5 IM |
371 | /* |
372 | * Calculate the averages and noises: | |
373 | */ | |
374 | static void calc_avg(void) | |
375 | { | |
376 | int i, j; | |
377 | ||
ef281a19 IM |
378 | if (verbose > 1) |
379 | fprintf(stderr, "\n"); | |
380 | ||
42202dd5 | 381 | for (i = 0; i < run_count; i++) { |
ef281a19 IM |
382 | update_avg("runtime", 0, &runtime_nsecs_avg, runtime_nsecs + i); |
383 | update_avg("walltime", 0, &walltime_nsecs_avg, walltime_nsecs + i); | |
384 | update_avg("runtime_cycles", 0, &runtime_cycles_avg, runtime_cycles + i); | |
42202dd5 IM |
385 | |
386 | for (j = 0; j < nr_counters; j++) { | |
ef281a19 IM |
387 | update_avg("counter/0", j, |
388 | event_res_avg[j]+0, event_res[i][j]+0); | |
389 | update_avg("counter/1", j, | |
390 | event_res_avg[j]+1, event_res[i][j]+1); | |
391 | update_avg("counter/2", j, | |
392 | event_res_avg[j]+2, event_res[i][j]+2); | |
566747e6 IM |
393 | if (event_scaled[i][j] != -1) |
394 | update_avg("scaled", j, | |
395 | event_scaled_avg + j, event_scaled[i]+j); | |
396 | else | |
397 | event_scaled_avg[j] = -1; | |
42202dd5 IM |
398 | } |
399 | } | |
400 | runtime_nsecs_avg /= run_count; | |
401 | walltime_nsecs_avg /= run_count; | |
402 | runtime_cycles_avg /= run_count; | |
403 | ||
404 | for (j = 0; j < nr_counters; j++) { | |
405 | event_res_avg[j][0] /= run_count; | |
406 | event_res_avg[j][1] /= run_count; | |
407 | event_res_avg[j][2] /= run_count; | |
408 | } | |
44db76c8 | 409 | |
42202dd5 IM |
410 | for (i = 0; i < run_count; i++) { |
411 | runtime_nsecs_noise += | |
9cffa8d5 | 412 | abs((s64)(runtime_nsecs[i] - runtime_nsecs_avg)); |
42202dd5 | 413 | walltime_nsecs_noise += |
9cffa8d5 | 414 | abs((s64)(walltime_nsecs[i] - walltime_nsecs_avg)); |
42202dd5 | 415 | runtime_cycles_noise += |
9cffa8d5 | 416 | abs((s64)(runtime_cycles[i] - runtime_cycles_avg)); |
42202dd5 IM |
417 | |
418 | for (j = 0; j < nr_counters; j++) { | |
419 | event_res_noise[j][0] += | |
9cffa8d5 | 420 | abs((s64)(event_res[i][j][0] - event_res_avg[j][0])); |
42202dd5 | 421 | event_res_noise[j][1] += |
9cffa8d5 | 422 | abs((s64)(event_res[i][j][1] - event_res_avg[j][1])); |
42202dd5 | 423 | event_res_noise[j][2] += |
9cffa8d5 | 424 | abs((s64)(event_res[i][j][2] - event_res_avg[j][2])); |
ddcacfa0 IM |
425 | } |
426 | } | |
44db76c8 | 427 | |
ef281a19 IM |
428 | normalize_noise(&runtime_nsecs_noise); |
429 | normalize_noise(&walltime_nsecs_noise); | |
430 | normalize_noise(&runtime_cycles_noise); | |
44db76c8 | 431 | |
42202dd5 | 432 | for (j = 0; j < nr_counters; j++) { |
ef281a19 IM |
433 | normalize_noise(&event_res_noise[j][0]); |
434 | normalize_noise(&event_res_noise[j][1]); | |
435 | normalize_noise(&event_res_noise[j][2]); | |
42202dd5 IM |
436 | } |
437 | } | |
438 | ||
439 | static void print_stat(int argc, const char **argv) | |
440 | { | |
441 | int i, counter; | |
442 | ||
443 | calc_avg(); | |
ddcacfa0 IM |
444 | |
445 | fflush(stdout); | |
446 | ||
447 | fprintf(stderr, "\n"); | |
44db76c8 IM |
448 | fprintf(stderr, " Performance counter stats for \'%s", argv[0]); |
449 | ||
450 | for (i = 1; i < argc; i++) | |
451 | fprintf(stderr, " %s", argv[i]); | |
452 | ||
42202dd5 IM |
453 | fprintf(stderr, "\'"); |
454 | if (run_count > 1) | |
455 | fprintf(stderr, " (%d runs)", run_count); | |
456 | fprintf(stderr, ":\n\n"); | |
2996f5dd | 457 | |
c04f5e5d IM |
458 | for (counter = 0; counter < nr_counters; counter++) |
459 | print_counter(counter); | |
ddcacfa0 | 460 | |
ddcacfa0 | 461 | fprintf(stderr, "\n"); |
566747e6 | 462 | fprintf(stderr, " %14.9f seconds time elapsed", |
42202dd5 | 463 | (double)walltime_nsecs_avg/1e9); |
566747e6 IM |
464 | if (run_count > 1) { |
465 | fprintf(stderr, " ( +- %7.3f%% )", | |
466 | 100.0*(double)walltime_nsecs_noise/(double)walltime_nsecs_avg); | |
467 | } | |
468 | fprintf(stderr, "\n\n"); | |
ddcacfa0 IM |
469 | } |
470 | ||
f7b7c26e PZ |
471 | static volatile int signr = -1; |
472 | ||
5242519b | 473 | static void skip_signal(int signo) |
ddcacfa0 | 474 | { |
f7b7c26e PZ |
475 | signr = signo; |
476 | } | |
477 | ||
478 | static void sig_atexit(void) | |
479 | { | |
480 | if (signr == -1) | |
481 | return; | |
482 | ||
483 | signal(signr, SIG_DFL); | |
484 | kill(getpid(), signr); | |
5242519b IM |
485 | } |
486 | ||
487 | static const char * const stat_usage[] = { | |
488 | "perf stat [<options>] <command>", | |
489 | NULL | |
490 | }; | |
491 | ||
5242519b IM |
492 | static const struct option options[] = { |
493 | OPT_CALLBACK('e', "event", NULL, "event", | |
86847b62 TG |
494 | "event selector. use 'perf list' to list available events", |
495 | parse_events), | |
5242519b IM |
496 | OPT_BOOLEAN('i', "inherit", &inherit, |
497 | "child tasks inherit counters"), | |
498 | OPT_INTEGER('p', "pid", &target_pid, | |
499 | "stat events on existing pid"), | |
500 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
3d632595 | 501 | "system-wide collection from all CPUs"), |
86847b62 | 502 | OPT_BOOLEAN('S', "scale", &scale, |
3d632595 | 503 | "scale/normalize counters"), |
743ee1f8 IM |
504 | OPT_BOOLEAN('v', "verbose", &verbose, |
505 | "be more verbose (show counter open errors, etc)"), | |
42202dd5 IM |
506 | OPT_INTEGER('r', "repeat", &run_count, |
507 | "repeat command and print average + stddev (max: 100)"), | |
0cfb7a13 IM |
508 | OPT_BOOLEAN('n', "null", &null_run, |
509 | "null run - dont start any counters"), | |
5242519b IM |
510 | OPT_END() |
511 | }; | |
512 | ||
513 | int cmd_stat(int argc, const char **argv, const char *prefix) | |
514 | { | |
42202dd5 IM |
515 | int status; |
516 | ||
5242519b IM |
517 | argc = parse_options(argc, argv, options, stat_usage, 0); |
518 | if (!argc) | |
519 | usage_with_options(stat_usage, options); | |
42202dd5 IM |
520 | if (run_count <= 0 || run_count > MAX_RUN) |
521 | usage_with_options(stat_usage, options); | |
ddcacfa0 | 522 | |
c3043569 JSR |
523 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
524 | if (!null_run && !nr_counters) { | |
525 | memcpy(attrs, default_attrs, sizeof(default_attrs)); | |
526 | nr_counters = ARRAY_SIZE(default_attrs); | |
527 | } | |
ddcacfa0 | 528 | |
ddcacfa0 IM |
529 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
530 | assert(nr_cpus <= MAX_NR_CPUS); | |
531 | assert(nr_cpus >= 0); | |
532 | ||
58d7e993 IM |
533 | /* |
534 | * We dont want to block the signals - that would cause | |
535 | * child tasks to inherit that and Ctrl-C would not work. | |
536 | * What we want is for Ctrl-C to work in the exec()-ed | |
537 | * task, but being ignored by perf stat itself: | |
538 | */ | |
f7b7c26e | 539 | atexit(sig_atexit); |
58d7e993 IM |
540 | signal(SIGINT, skip_signal); |
541 | signal(SIGALRM, skip_signal); | |
542 | signal(SIGABRT, skip_signal); | |
543 | ||
42202dd5 IM |
544 | status = 0; |
545 | for (run_idx = 0; run_idx < run_count; run_idx++) { | |
546 | if (run_count != 1 && verbose) | |
3d632595 | 547 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
42202dd5 IM |
548 | status = run_perf_stat(argc, argv); |
549 | } | |
550 | ||
551 | print_stat(argc, argv); | |
552 | ||
553 | return status; | |
ddcacfa0 | 554 | } |