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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 FW |
45 | #include "util/event.h" |
46 | #include "util/debug.h" | |
60666c63 | 47 | #include "util/header.h" |
a12b51c4 | 48 | #include "util/cpumap.h" |
d6d901c2 | 49 | #include "util/thread.h" |
ddcacfa0 | 50 | |
ddcacfa0 | 51 | #include <sys/prctl.h> |
42202dd5 | 52 | #include <math.h> |
5af52b51 | 53 | #include <locale.h> |
16c8a109 | 54 | |
d7470b6a SE |
55 | #define DEFAULT_SEPARATOR " " |
56 | ||
cdd6c482 | 57 | static struct perf_event_attr default_attrs[] = { |
ddcacfa0 | 58 | |
56aab464 IM |
59 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
60 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, | |
61 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, | |
62 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, | |
f4dbfa8f | 63 | |
56aab464 IM |
64 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
65 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, | |
56aab464 IM |
66 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, |
67 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, | |
dd86e72a IM |
68 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, |
69 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, | |
f4dbfa8f | 70 | |
ddcacfa0 | 71 | }; |
5242519b | 72 | |
c0555642 | 73 | static bool system_wide = false; |
c45c6ea2 | 74 | static int nr_cpus = 0; |
3d632595 | 75 | static int run_idx = 0; |
ddcacfa0 | 76 | |
3d632595 | 77 | static int run_count = 1; |
2e6cdf99 | 78 | static bool no_inherit = false; |
c0555642 | 79 | static bool scale = true; |
f5b4a9c3 | 80 | static bool no_aggr = false; |
933da83a | 81 | static pid_t target_pid = -1; |
d6d901c2 ZY |
82 | static pid_t target_tid = -1; |
83 | static pid_t *all_tids = NULL; | |
84 | static int thread_num = 0; | |
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 | |
ddcacfa0 | 93 | |
d6d901c2 | 94 | static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; |
42202dd5 | 95 | |
63d40deb | 96 | static int event_scaled[MAX_COUNTERS]; |
3d632595 | 97 | |
f5b4a9c3 SE |
98 | static struct { |
99 | u64 val; | |
100 | u64 ena; | |
101 | u64 run; | |
102 | } cpu_counts[MAX_NR_CPUS][MAX_COUNTERS]; | |
103 | ||
60666c63 LW |
104 | static volatile int done = 0; |
105 | ||
506d4bc8 PZ |
106 | struct stats |
107 | { | |
8a02631a | 108 | double n, mean, M2; |
506d4bc8 | 109 | }; |
42202dd5 | 110 | |
9e9772c4 PZ |
111 | static void update_stats(struct stats *stats, u64 val) |
112 | { | |
8a02631a | 113 | double delta; |
9e9772c4 | 114 | |
8a02631a PZ |
115 | stats->n++; |
116 | delta = val - stats->mean; | |
117 | stats->mean += delta / stats->n; | |
118 | stats->M2 += delta*(val - stats->mean); | |
9e9772c4 PZ |
119 | } |
120 | ||
506d4bc8 PZ |
121 | static double avg_stats(struct stats *stats) |
122 | { | |
8a02631a | 123 | return stats->mean; |
506d4bc8 | 124 | } |
42202dd5 | 125 | |
506d4bc8 | 126 | /* |
63d40deb PZ |
127 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance |
128 | * | |
8a02631a PZ |
129 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n |
130 | * s^2 = ------------------------------- | |
131 | * n - 1 | |
63d40deb PZ |
132 | * |
133 | * http://en.wikipedia.org/wiki/Stddev | |
134 | * | |
135 | * The std dev of the mean is related to the std dev by: | |
136 | * | |
137 | * s | |
138 | * s_mean = ------- | |
139 | * sqrt(n) | |
140 | * | |
506d4bc8 PZ |
141 | */ |
142 | static double stddev_stats(struct stats *stats) | |
143 | { | |
8a02631a PZ |
144 | double variance = stats->M2 / (stats->n - 1); |
145 | double variance_mean = variance / stats->n; | |
42202dd5 | 146 | |
63d40deb | 147 | return sqrt(variance_mean); |
506d4bc8 | 148 | } |
42202dd5 | 149 | |
506d4bc8 | 150 | struct stats event_res_stats[MAX_COUNTERS][3]; |
f5b4a9c3 SE |
151 | struct stats runtime_nsecs_stats[MAX_NR_CPUS]; |
152 | struct stats runtime_cycles_stats[MAX_NR_CPUS]; | |
153 | struct stats runtime_branches_stats[MAX_NR_CPUS]; | |
506d4bc8 | 154 | struct stats walltime_nsecs_stats; |
be1ac0d8 | 155 | |
b9ebdcc0 JSR |
156 | #define MATCH_EVENT(t, c, counter) \ |
157 | (attrs[counter].type == PERF_TYPE_##t && \ | |
158 | attrs[counter].config == PERF_COUNT_##c) | |
159 | ||
cca03c0a | 160 | #define ERR_PERF_OPEN \ |
d9cf837e | 161 | "counter %d, sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information." |
cca03c0a | 162 | |
d9cf837e | 163 | static int create_perf_stat_counter(int counter, bool *perm_err) |
ddcacfa0 | 164 | { |
cdd6c482 | 165 | struct perf_event_attr *attr = attrs + counter; |
d6d901c2 | 166 | int thread; |
084ab9f8 | 167 | int ncreated = 0; |
16c8a109 | 168 | |
ddcacfa0 | 169 | if (scale) |
a21ca2ca IM |
170 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
171 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
ddcacfa0 IM |
172 | |
173 | if (system_wide) { | |
c45c6ea2 | 174 | int cpu; |
f37a291c | 175 | |
cca03c0a | 176 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
d6d901c2 ZY |
177 | fd[cpu][counter][0] = sys_perf_event_open(attr, |
178 | -1, cpumap[cpu], -1, 0); | |
d9cf837e CA |
179 | if (fd[cpu][counter][0] < 0) { |
180 | if (errno == EPERM || errno == EACCES) | |
181 | *perm_err = true; | |
182 | error(ERR_PERF_OPEN, counter, | |
084ab9f8 | 183 | fd[cpu][counter][0], strerror(errno)); |
d9cf837e | 184 | } else { |
084ab9f8 | 185 | ++ncreated; |
d9cf837e | 186 | } |
ddcacfa0 IM |
187 | } |
188 | } else { | |
2e6cdf99 SE |
189 | attr->inherit = !no_inherit; |
190 | if (target_pid == -1 && target_tid == -1) { | |
6be2850e ZY |
191 | attr->disabled = 1; |
192 | attr->enable_on_exec = 1; | |
193 | } | |
d6d901c2 ZY |
194 | for (thread = 0; thread < thread_num; thread++) { |
195 | fd[0][counter][thread] = sys_perf_event_open(attr, | |
196 | all_tids[thread], -1, -1, 0); | |
d9cf837e CA |
197 | if (fd[0][counter][thread] < 0) { |
198 | if (errno == EPERM || errno == EACCES) | |
199 | *perm_err = true; | |
200 | error(ERR_PERF_OPEN, counter, | |
084ab9f8 ACM |
201 | fd[0][counter][thread], |
202 | strerror(errno)); | |
d9cf837e | 203 | } else { |
084ab9f8 | 204 | ++ncreated; |
d9cf837e | 205 | } |
d6d901c2 | 206 | } |
ddcacfa0 | 207 | } |
084ab9f8 ACM |
208 | |
209 | return ncreated; | |
ddcacfa0 IM |
210 | } |
211 | ||
c04f5e5d IM |
212 | /* |
213 | * Does the counter have nsecs as a unit? | |
214 | */ | |
215 | static inline int nsec_counter(int counter) | |
216 | { | |
b9ebdcc0 JSR |
217 | if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) || |
218 | MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) | |
c04f5e5d IM |
219 | return 1; |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | /* | |
2996f5dd | 225 | * Read out the results of a single counter: |
f5b4a9c3 | 226 | * aggregate counts across CPUs in system-wide mode |
c04f5e5d | 227 | */ |
f5b4a9c3 | 228 | static void read_counter_aggr(int counter) |
c04f5e5d | 229 | { |
849abde9 | 230 | u64 count[3], single_count[3]; |
c45c6ea2 | 231 | int cpu; |
f37a291c | 232 | size_t res, nv; |
c04f5e5d | 233 | int scaled; |
d6d901c2 | 234 | int i, thread; |
c04f5e5d IM |
235 | |
236 | count[0] = count[1] = count[2] = 0; | |
2996f5dd | 237 | |
c04f5e5d | 238 | nv = scale ? 3 : 1; |
cca03c0a | 239 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
d6d901c2 ZY |
240 | for (thread = 0; thread < thread_num; thread++) { |
241 | if (fd[cpu][counter][thread] < 0) | |
242 | continue; | |
243 | ||
244 | res = read(fd[cpu][counter][thread], | |
245 | single_count, nv * sizeof(u64)); | |
246 | assert(res == nv * sizeof(u64)); | |
247 | ||
248 | close(fd[cpu][counter][thread]); | |
249 | fd[cpu][counter][thread] = -1; | |
250 | ||
251 | count[0] += single_count[0]; | |
252 | if (scale) { | |
253 | count[1] += single_count[1]; | |
254 | count[2] += single_count[2]; | |
255 | } | |
c04f5e5d IM |
256 | } |
257 | } | |
258 | ||
259 | scaled = 0; | |
260 | if (scale) { | |
261 | if (count[2] == 0) { | |
9e9772c4 | 262 | event_scaled[counter] = -1; |
2996f5dd | 263 | count[0] = 0; |
c04f5e5d IM |
264 | return; |
265 | } | |
2996f5dd | 266 | |
c04f5e5d | 267 | if (count[2] < count[1]) { |
9e9772c4 | 268 | event_scaled[counter] = 1; |
c04f5e5d IM |
269 | count[0] = (unsigned long long) |
270 | ((double)count[0] * count[1] / count[2] + 0.5); | |
271 | } | |
272 | } | |
9e9772c4 PZ |
273 | |
274 | for (i = 0; i < 3; i++) | |
275 | update_stats(&event_res_stats[counter][i], count[i]); | |
276 | ||
277 | if (verbose) { | |
278 | fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter), | |
279 | count[0], count[1], count[2]); | |
280 | } | |
281 | ||
be1ac0d8 IM |
282 | /* |
283 | * Save the full runtime - to allow normalization during printout: | |
284 | */ | |
b9ebdcc0 | 285 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
f5b4a9c3 | 286 | update_stats(&runtime_nsecs_stats[0], count[0]); |
b9ebdcc0 | 287 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
f5b4a9c3 | 288 | update_stats(&runtime_cycles_stats[0], count[0]); |
11018201 | 289 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) |
f5b4a9c3 SE |
290 | update_stats(&runtime_branches_stats[0], count[0]); |
291 | } | |
292 | ||
293 | /* | |
294 | * Read out the results of a single counter: | |
295 | * do not aggregate counts across CPUs in system-wide mode | |
296 | */ | |
297 | static void read_counter(int counter) | |
298 | { | |
299 | u64 count[3]; | |
300 | int cpu; | |
301 | size_t res, nv; | |
302 | ||
303 | count[0] = count[1] = count[2] = 0; | |
304 | ||
305 | nv = scale ? 3 : 1; | |
306 | ||
307 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
308 | ||
309 | if (fd[cpu][counter][0] < 0) | |
310 | continue; | |
311 | ||
312 | res = read(fd[cpu][counter][0], count, nv * sizeof(u64)); | |
313 | ||
314 | assert(res == nv * sizeof(u64)); | |
315 | ||
316 | close(fd[cpu][counter][0]); | |
317 | fd[cpu][counter][0] = -1; | |
318 | ||
319 | if (scale) { | |
320 | if (count[2] == 0) { | |
321 | count[0] = 0; | |
322 | } else if (count[2] < count[1]) { | |
323 | count[0] = (unsigned long long) | |
324 | ((double)count[0] * count[1] / count[2] + 0.5); | |
325 | } | |
326 | } | |
327 | cpu_counts[cpu][counter].val = count[0]; /* scaled count */ | |
328 | cpu_counts[cpu][counter].ena = count[1]; | |
329 | cpu_counts[cpu][counter].run = count[2]; | |
330 | ||
331 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) | |
332 | update_stats(&runtime_nsecs_stats[cpu], count[0]); | |
333 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) | |
334 | update_stats(&runtime_cycles_stats[cpu], count[0]); | |
335 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) | |
336 | update_stats(&runtime_branches_stats[cpu], count[0]); | |
337 | } | |
2996f5dd IM |
338 | } |
339 | ||
f37a291c | 340 | static int run_perf_stat(int argc __used, const char **argv) |
42202dd5 IM |
341 | { |
342 | unsigned long long t0, t1; | |
343 | int status = 0; | |
084ab9f8 | 344 | int counter, ncreated = 0; |
051ae7f7 | 345 | int child_ready_pipe[2], go_pipe[2]; |
d9cf837e | 346 | bool perm_err = false; |
6be2850e | 347 | const bool forks = (argc > 0); |
051ae7f7 | 348 | char buf; |
42202dd5 IM |
349 | |
350 | if (!system_wide) | |
351 | nr_cpus = 1; | |
352 | ||
60666c63 | 353 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
051ae7f7 PM |
354 | perror("failed to create pipes"); |
355 | exit(1); | |
356 | } | |
357 | ||
60666c63 | 358 | if (forks) { |
6be2850e | 359 | if ((child_pid = fork()) < 0) |
60666c63 LW |
360 | perror("failed to fork"); |
361 | ||
6be2850e | 362 | if (!child_pid) { |
60666c63 LW |
363 | close(child_ready_pipe[0]); |
364 | close(go_pipe[1]); | |
365 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
366 | ||
367 | /* | |
368 | * Do a dummy execvp to get the PLT entry resolved, | |
369 | * so we avoid the resolver overhead on the real | |
370 | * execvp call. | |
371 | */ | |
372 | execvp("", (char **)argv); | |
373 | ||
374 | /* | |
375 | * Tell the parent we're ready to go | |
376 | */ | |
377 | close(child_ready_pipe[1]); | |
378 | ||
379 | /* | |
380 | * Wait until the parent tells us to go. | |
381 | */ | |
382 | if (read(go_pipe[0], &buf, 1) == -1) | |
383 | perror("unable to read pipe"); | |
384 | ||
385 | execvp(argv[0], (char **)argv); | |
386 | ||
387 | perror(argv[0]); | |
388 | exit(-1); | |
389 | } | |
051ae7f7 | 390 | |
d6d901c2 ZY |
391 | if (target_tid == -1 && target_pid == -1 && !system_wide) |
392 | all_tids[0] = child_pid; | |
393 | ||
051ae7f7 | 394 | /* |
60666c63 | 395 | * Wait for the child to be ready to exec. |
051ae7f7 PM |
396 | */ |
397 | close(child_ready_pipe[1]); | |
60666c63 LW |
398 | close(go_pipe[0]); |
399 | if (read(child_ready_pipe[0], &buf, 1) == -1) | |
a92bef0f | 400 | perror("unable to read pipe"); |
60666c63 | 401 | close(child_ready_pipe[0]); |
051ae7f7 PM |
402 | } |
403 | ||
42202dd5 | 404 | for (counter = 0; counter < nr_counters; counter++) |
d9cf837e CA |
405 | ncreated += create_perf_stat_counter(counter, &perm_err); |
406 | ||
407 | if (ncreated < nr_counters) { | |
408 | if (perm_err) | |
409 | error("You may not have permission to collect %sstats.\n" | |
410 | "\t Consider tweaking" | |
411 | " /proc/sys/kernel/perf_event_paranoid or running as root.", | |
412 | system_wide ? "system-wide " : ""); | |
413 | die("Not all events could be opened.\n"); | |
084ab9f8 ACM |
414 | if (child_pid != -1) |
415 | kill(child_pid, SIGTERM); | |
416 | return -1; | |
417 | } | |
42202dd5 IM |
418 | |
419 | /* | |
420 | * Enable counters and exec the command: | |
421 | */ | |
422 | t0 = rdclock(); | |
42202dd5 | 423 | |
60666c63 LW |
424 | if (forks) { |
425 | close(go_pipe[1]); | |
426 | wait(&status); | |
427 | } else { | |
6be2850e | 428 | while(!done) sleep(1); |
60666c63 | 429 | } |
42202dd5 | 430 | |
42202dd5 IM |
431 | t1 = rdclock(); |
432 | ||
9e9772c4 | 433 | update_stats(&walltime_nsecs_stats, t1 - t0); |
42202dd5 | 434 | |
f5b4a9c3 SE |
435 | if (no_aggr) { |
436 | for (counter = 0; counter < nr_counters; counter++) | |
437 | read_counter(counter); | |
438 | } else { | |
439 | for (counter = 0; counter < nr_counters; counter++) | |
440 | read_counter_aggr(counter); | |
441 | } | |
42202dd5 IM |
442 | return WEXITSTATUS(status); |
443 | } | |
444 | ||
849abde9 | 445 | static void print_noise(int counter, double avg) |
42202dd5 | 446 | { |
849abde9 PZ |
447 | if (run_count == 1) |
448 | return; | |
449 | ||
450 | fprintf(stderr, " ( +- %7.3f%% )", | |
451 | 100 * stddev_stats(&event_res_stats[counter][0]) / avg); | |
42202dd5 IM |
452 | } |
453 | ||
f5b4a9c3 | 454 | static void nsec_printout(int cpu, int counter, double avg) |
44175b6f | 455 | { |
506d4bc8 | 456 | double msecs = avg / 1e6; |
d7470b6a SE |
457 | char cpustr[16] = { '\0', }; |
458 | const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s"; | |
44175b6f | 459 | |
f5b4a9c3 | 460 | if (no_aggr) |
d7470b6a SE |
461 | sprintf(cpustr, "CPU%*d%s", |
462 | csv_output ? 0 : -4, | |
463 | cpumap[cpu], csv_sep); | |
464 | ||
465 | fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(counter)); | |
466 | ||
467 | if (csv_output) | |
468 | return; | |
44175b6f | 469 | |
b9ebdcc0 | 470 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { |
506d4bc8 PZ |
471 | fprintf(stderr, " # %10.3f CPUs ", |
472 | avg / avg_stats(&walltime_nsecs_stats)); | |
44175b6f IM |
473 | } |
474 | } | |
475 | ||
f5b4a9c3 | 476 | static void abs_printout(int cpu, int counter, double avg) |
44175b6f | 477 | { |
c7f7fea3 | 478 | double total, ratio = 0.0; |
f5b4a9c3 | 479 | char cpustr[16] = { '\0', }; |
d7470b6a SE |
480 | const char *fmt; |
481 | ||
482 | if (csv_output) | |
483 | fmt = "%s%.0f%s%s"; | |
484 | else if (big_num) | |
485 | fmt = "%s%'18.0f%s%-24s"; | |
486 | else | |
487 | fmt = "%s%18.0f%s%-24s"; | |
f5b4a9c3 SE |
488 | |
489 | if (no_aggr) | |
d7470b6a SE |
490 | sprintf(cpustr, "CPU%*d%s", |
491 | csv_output ? 0 : -4, | |
492 | cpumap[cpu], csv_sep); | |
f5b4a9c3 SE |
493 | else |
494 | cpu = 0; | |
c7f7fea3 | 495 | |
d7470b6a SE |
496 | fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(counter)); |
497 | ||
498 | if (csv_output) | |
499 | return; | |
44175b6f | 500 | |
506d4bc8 | 501 | if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { |
f5b4a9c3 | 502 | total = avg_stats(&runtime_cycles_stats[cpu]); |
c7f7fea3 IM |
503 | |
504 | if (total) | |
505 | ratio = avg / total; | |
506 | ||
507 | fprintf(stderr, " # %10.3f IPC ", ratio); | |
7255fe2a | 508 | } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) && |
f5b4a9c3 SE |
509 | runtime_branches_stats[cpu].n != 0) { |
510 | total = avg_stats(&runtime_branches_stats[cpu]); | |
11018201 AB |
511 | |
512 | if (total) | |
513 | ratio = avg * 100 / total; | |
514 | ||
dd86e72a | 515 | fprintf(stderr, " # %10.3f %% ", ratio); |
11018201 | 516 | |
f5b4a9c3 SE |
517 | } else if (runtime_nsecs_stats[cpu].n != 0) { |
518 | total = avg_stats(&runtime_nsecs_stats[cpu]); | |
c7f7fea3 IM |
519 | |
520 | if (total) | |
521 | ratio = 1000.0 * avg / total; | |
522 | ||
523 | fprintf(stderr, " # %10.3f M/sec", ratio); | |
44175b6f | 524 | } |
44175b6f IM |
525 | } |
526 | ||
2996f5dd IM |
527 | /* |
528 | * Print out the results of a single counter: | |
f5b4a9c3 | 529 | * aggregated counts in system-wide mode |
2996f5dd | 530 | */ |
f5b4a9c3 | 531 | static void print_counter_aggr(int counter) |
2996f5dd | 532 | { |
849abde9 | 533 | double avg = avg_stats(&event_res_stats[counter][0]); |
63d40deb | 534 | int scaled = event_scaled[counter]; |
2996f5dd | 535 | |
2996f5dd | 536 | if (scaled == -1) { |
d7470b6a SE |
537 | fprintf(stderr, "%*s%s%-24s\n", |
538 | csv_output ? 0 : 18, | |
539 | "<not counted>", csv_sep, event_name(counter)); | |
2996f5dd IM |
540 | return; |
541 | } | |
c04f5e5d | 542 | |
44175b6f | 543 | if (nsec_counter(counter)) |
f5b4a9c3 | 544 | nsec_printout(-1, counter, avg); |
44175b6f | 545 | else |
f5b4a9c3 | 546 | abs_printout(-1, counter, avg); |
849abde9 | 547 | |
d7470b6a SE |
548 | if (csv_output) { |
549 | fputc('\n', stderr); | |
550 | return; | |
551 | } | |
552 | ||
849abde9 | 553 | print_noise(counter, avg); |
506d4bc8 PZ |
554 | |
555 | if (scaled) { | |
556 | double avg_enabled, avg_running; | |
557 | ||
558 | avg_enabled = avg_stats(&event_res_stats[counter][1]); | |
559 | avg_running = avg_stats(&event_res_stats[counter][2]); | |
d7c29318 | 560 | |
210ad39f | 561 | fprintf(stderr, " (scaled from %.2f%%)", |
506d4bc8 PZ |
562 | 100 * avg_running / avg_enabled); |
563 | } | |
44175b6f | 564 | |
c04f5e5d IM |
565 | fprintf(stderr, "\n"); |
566 | } | |
567 | ||
f5b4a9c3 SE |
568 | /* |
569 | * Print out the results of a single counter: | |
570 | * does not use aggregated count in system-wide | |
571 | */ | |
572 | static void print_counter(int counter) | |
573 | { | |
574 | u64 ena, run, val; | |
575 | int cpu; | |
576 | ||
577 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
578 | val = cpu_counts[cpu][counter].val; | |
579 | ena = cpu_counts[cpu][counter].ena; | |
580 | run = cpu_counts[cpu][counter].run; | |
581 | if (run == 0 || ena == 0) { | |
d7470b6a SE |
582 | fprintf(stderr, "CPU%*d%s%*s%s%-24s", |
583 | csv_output ? 0 : -4, | |
584 | cpumap[cpu], csv_sep, | |
585 | csv_output ? 0 : 18, | |
586 | "<not counted>", csv_sep, | |
587 | event_name(counter)); | |
f5b4a9c3 SE |
588 | |
589 | fprintf(stderr, "\n"); | |
590 | continue; | |
591 | } | |
592 | ||
593 | if (nsec_counter(counter)) | |
594 | nsec_printout(cpu, counter, val); | |
595 | else | |
596 | abs_printout(cpu, counter, val); | |
597 | ||
d7470b6a SE |
598 | if (!csv_output) { |
599 | print_noise(counter, 1.0); | |
f5b4a9c3 | 600 | |
d7470b6a SE |
601 | if (run != ena) { |
602 | fprintf(stderr, " (scaled from %.2f%%)", | |
f5b4a9c3 | 603 | 100.0 * run / ena); |
d7470b6a | 604 | } |
f5b4a9c3 SE |
605 | } |
606 | fprintf(stderr, "\n"); | |
607 | } | |
608 | } | |
609 | ||
42202dd5 IM |
610 | static void print_stat(int argc, const char **argv) |
611 | { | |
612 | int i, counter; | |
613 | ||
ddcacfa0 IM |
614 | fflush(stdout); |
615 | ||
d7470b6a SE |
616 | if (!csv_output) { |
617 | fprintf(stderr, "\n"); | |
618 | fprintf(stderr, " Performance counter stats for "); | |
619 | if(target_pid == -1 && target_tid == -1) { | |
620 | fprintf(stderr, "\'%s", argv[0]); | |
621 | for (i = 1; i < argc; i++) | |
622 | fprintf(stderr, " %s", argv[i]); | |
623 | } else if (target_pid != -1) | |
624 | fprintf(stderr, "process id \'%d", target_pid); | |
625 | else | |
626 | fprintf(stderr, "thread id \'%d", target_tid); | |
44db76c8 | 627 | |
d7470b6a SE |
628 | fprintf(stderr, "\'"); |
629 | if (run_count > 1) | |
630 | fprintf(stderr, " (%d runs)", run_count); | |
631 | fprintf(stderr, ":\n\n"); | |
632 | } | |
2996f5dd | 633 | |
f5b4a9c3 SE |
634 | if (no_aggr) { |
635 | for (counter = 0; counter < nr_counters; counter++) | |
636 | print_counter(counter); | |
637 | } else { | |
638 | for (counter = 0; counter < nr_counters; counter++) | |
639 | print_counter_aggr(counter); | |
640 | } | |
ddcacfa0 | 641 | |
d7470b6a SE |
642 | if (!csv_output) { |
643 | fprintf(stderr, "\n"); | |
644 | fprintf(stderr, " %18.9f seconds time elapsed", | |
645 | avg_stats(&walltime_nsecs_stats)/1e9); | |
646 | if (run_count > 1) { | |
647 | fprintf(stderr, " ( +- %7.3f%% )", | |
506d4bc8 PZ |
648 | 100*stddev_stats(&walltime_nsecs_stats) / |
649 | avg_stats(&walltime_nsecs_stats)); | |
d7470b6a SE |
650 | } |
651 | fprintf(stderr, "\n\n"); | |
566747e6 | 652 | } |
ddcacfa0 IM |
653 | } |
654 | ||
f7b7c26e PZ |
655 | static volatile int signr = -1; |
656 | ||
5242519b | 657 | static void skip_signal(int signo) |
ddcacfa0 | 658 | { |
6be2850e | 659 | if(child_pid == -1) |
60666c63 LW |
660 | done = 1; |
661 | ||
f7b7c26e PZ |
662 | signr = signo; |
663 | } | |
664 | ||
665 | static void sig_atexit(void) | |
666 | { | |
933da83a CW |
667 | if (child_pid != -1) |
668 | kill(child_pid, SIGTERM); | |
669 | ||
f7b7c26e PZ |
670 | if (signr == -1) |
671 | return; | |
672 | ||
673 | signal(signr, SIG_DFL); | |
674 | kill(getpid(), signr); | |
5242519b IM |
675 | } |
676 | ||
677 | static const char * const stat_usage[] = { | |
60666c63 | 678 | "perf stat [<options>] [<command>]", |
5242519b IM |
679 | NULL |
680 | }; | |
681 | ||
d7470b6a SE |
682 | static int stat__set_big_num(const struct option *opt __used, |
683 | const char *s __used, int unset) | |
684 | { | |
685 | big_num_opt = unset ? 0 : 1; | |
686 | return 0; | |
687 | } | |
688 | ||
5242519b IM |
689 | static const struct option options[] = { |
690 | OPT_CALLBACK('e', "event", NULL, "event", | |
86847b62 TG |
691 | "event selector. use 'perf list' to list available events", |
692 | parse_events), | |
2e6cdf99 SE |
693 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
694 | "child tasks do not inherit counters"), | |
5242519b | 695 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
696 | "stat events on existing process id"), |
697 | OPT_INTEGER('t', "tid", &target_tid, | |
698 | "stat events on existing thread id"), | |
5242519b | 699 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
3d632595 | 700 | "system-wide collection from all CPUs"), |
b26bc5a7 | 701 | OPT_BOOLEAN('c', "scale", &scale, |
3d632595 | 702 | "scale/normalize counters"), |
c0555642 | 703 | OPT_INCR('v', "verbose", &verbose, |
743ee1f8 | 704 | "be more verbose (show counter open errors, etc)"), |
42202dd5 IM |
705 | OPT_INTEGER('r', "repeat", &run_count, |
706 | "repeat command and print average + stddev (max: 100)"), | |
0cfb7a13 IM |
707 | OPT_BOOLEAN('n', "null", &null_run, |
708 | "null run - dont start any counters"), | |
d7470b6a SE |
709 | OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, |
710 | "print large numbers with thousands\' separators", | |
711 | stat__set_big_num), | |
c45c6ea2 SE |
712 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
713 | "list of cpus to monitor in system-wide"), | |
f5b4a9c3 SE |
714 | OPT_BOOLEAN('A', "no-aggr", &no_aggr, |
715 | "disable CPU count aggregation"), | |
d7470b6a SE |
716 | OPT_STRING('x', "field-separator", &csv_sep, "separator", |
717 | "print counts with custom separator"), | |
5242519b IM |
718 | OPT_END() |
719 | }; | |
720 | ||
f37a291c | 721 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
5242519b | 722 | { |
42202dd5 | 723 | int status; |
d6d901c2 | 724 | int i,j; |
42202dd5 | 725 | |
5af52b51 SE |
726 | setlocale(LC_ALL, ""); |
727 | ||
a0541234 AB |
728 | argc = parse_options(argc, argv, options, stat_usage, |
729 | PARSE_OPT_STOP_AT_NON_OPTION); | |
d7470b6a SE |
730 | |
731 | if (csv_sep) | |
732 | csv_output = true; | |
733 | else | |
734 | csv_sep = DEFAULT_SEPARATOR; | |
735 | ||
736 | /* | |
737 | * let the spreadsheet do the pretty-printing | |
738 | */ | |
739 | if (csv_output) { | |
740 | /* User explicitely passed -B? */ | |
741 | if (big_num_opt == 1) { | |
742 | fprintf(stderr, "-B option not supported with -x\n"); | |
743 | usage_with_options(stat_usage, options); | |
744 | } else /* Nope, so disable big number formatting */ | |
745 | big_num = false; | |
746 | } else if (big_num_opt == 0) /* User passed --no-big-num */ | |
747 | big_num = false; | |
748 | ||
d6d901c2 | 749 | if (!argc && target_pid == -1 && target_tid == -1) |
5242519b | 750 | usage_with_options(stat_usage, options); |
9e9772c4 | 751 | if (run_count <= 0) |
42202dd5 | 752 | usage_with_options(stat_usage, options); |
ddcacfa0 | 753 | |
f5b4a9c3 SE |
754 | /* no_aggr is for system-wide only */ |
755 | if (no_aggr && !system_wide) | |
756 | usage_with_options(stat_usage, options); | |
757 | ||
c3043569 JSR |
758 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
759 | if (!null_run && !nr_counters) { | |
760 | memcpy(attrs, default_attrs, sizeof(default_attrs)); | |
761 | nr_counters = ARRAY_SIZE(default_attrs); | |
762 | } | |
ddcacfa0 | 763 | |
a12b51c4 | 764 | if (system_wide) |
c45c6ea2 | 765 | nr_cpus = read_cpu_map(cpu_list); |
a12b51c4 PM |
766 | else |
767 | nr_cpus = 1; | |
ddcacfa0 | 768 | |
c45c6ea2 SE |
769 | if (nr_cpus < 1) |
770 | usage_with_options(stat_usage, options); | |
771 | ||
d6d901c2 ZY |
772 | if (target_pid != -1) { |
773 | target_tid = target_pid; | |
774 | thread_num = find_all_tid(target_pid, &all_tids); | |
775 | if (thread_num <= 0) { | |
776 | fprintf(stderr, "Can't find all threads of pid %d\n", | |
777 | target_pid); | |
778 | usage_with_options(stat_usage, options); | |
779 | } | |
780 | } else { | |
781 | all_tids=malloc(sizeof(pid_t)); | |
782 | if (!all_tids) | |
783 | return -ENOMEM; | |
784 | ||
785 | all_tids[0] = target_tid; | |
786 | thread_num = 1; | |
787 | } | |
788 | ||
789 | for (i = 0; i < MAX_NR_CPUS; i++) { | |
790 | for (j = 0; j < MAX_COUNTERS; j++) { | |
791 | fd[i][j] = malloc(sizeof(int)*thread_num); | |
792 | if (!fd[i][j]) | |
793 | return -ENOMEM; | |
794 | } | |
795 | } | |
796 | ||
58d7e993 IM |
797 | /* |
798 | * We dont want to block the signals - that would cause | |
799 | * child tasks to inherit that and Ctrl-C would not work. | |
800 | * What we want is for Ctrl-C to work in the exec()-ed | |
801 | * task, but being ignored by perf stat itself: | |
802 | */ | |
f7b7c26e | 803 | atexit(sig_atexit); |
58d7e993 IM |
804 | signal(SIGINT, skip_signal); |
805 | signal(SIGALRM, skip_signal); | |
806 | signal(SIGABRT, skip_signal); | |
807 | ||
42202dd5 IM |
808 | status = 0; |
809 | for (run_idx = 0; run_idx < run_count; run_idx++) { | |
810 | if (run_count != 1 && verbose) | |
3d632595 | 811 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
42202dd5 IM |
812 | status = run_perf_stat(argc, argv); |
813 | } | |
814 | ||
084ab9f8 ACM |
815 | if (status != -1) |
816 | print_stat(argc, argv); | |
42202dd5 IM |
817 | |
818 | return status; | |
ddcacfa0 | 819 | } |