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 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 | |
cdd6c482 | 55 | static struct perf_event_attr default_attrs[] = { |
ddcacfa0 | 56 | |
56aab464 IM |
57 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
58 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, | |
59 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, | |
60 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, | |
f4dbfa8f | 61 | |
56aab464 IM |
62 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
63 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, | |
56aab464 IM |
64 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, |
65 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, | |
dd86e72a IM |
66 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, |
67 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, | |
f4dbfa8f | 68 | |
ddcacfa0 | 69 | }; |
5242519b | 70 | |
c0555642 | 71 | static bool system_wide = false; |
c45c6ea2 | 72 | static int nr_cpus = 0; |
3d632595 | 73 | static int run_idx = 0; |
ddcacfa0 | 74 | |
3d632595 | 75 | static int run_count = 1; |
2e6cdf99 | 76 | static bool no_inherit = false; |
c0555642 | 77 | static bool scale = true; |
f5b4a9c3 | 78 | static bool no_aggr = false; |
933da83a | 79 | static pid_t target_pid = -1; |
d6d901c2 ZY |
80 | static pid_t target_tid = -1; |
81 | static pid_t *all_tids = NULL; | |
82 | static int thread_num = 0; | |
933da83a | 83 | static pid_t child_pid = -1; |
c0555642 | 84 | static bool null_run = false; |
5af52b51 | 85 | static bool big_num = false; |
c45c6ea2 | 86 | static const char *cpu_list; |
5af52b51 | 87 | |
ddcacfa0 | 88 | |
d6d901c2 | 89 | static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; |
42202dd5 | 90 | |
63d40deb | 91 | static int event_scaled[MAX_COUNTERS]; |
3d632595 | 92 | |
f5b4a9c3 SE |
93 | static struct { |
94 | u64 val; | |
95 | u64 ena; | |
96 | u64 run; | |
97 | } cpu_counts[MAX_NR_CPUS][MAX_COUNTERS]; | |
98 | ||
60666c63 LW |
99 | static volatile int done = 0; |
100 | ||
506d4bc8 PZ |
101 | struct stats |
102 | { | |
8a02631a | 103 | double n, mean, M2; |
506d4bc8 | 104 | }; |
42202dd5 | 105 | |
9e9772c4 PZ |
106 | static void update_stats(struct stats *stats, u64 val) |
107 | { | |
8a02631a | 108 | double delta; |
9e9772c4 | 109 | |
8a02631a PZ |
110 | stats->n++; |
111 | delta = val - stats->mean; | |
112 | stats->mean += delta / stats->n; | |
113 | stats->M2 += delta*(val - stats->mean); | |
9e9772c4 PZ |
114 | } |
115 | ||
506d4bc8 PZ |
116 | static double avg_stats(struct stats *stats) |
117 | { | |
8a02631a | 118 | return stats->mean; |
506d4bc8 | 119 | } |
42202dd5 | 120 | |
506d4bc8 | 121 | /* |
63d40deb PZ |
122 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance |
123 | * | |
8a02631a PZ |
124 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n |
125 | * s^2 = ------------------------------- | |
126 | * n - 1 | |
63d40deb PZ |
127 | * |
128 | * http://en.wikipedia.org/wiki/Stddev | |
129 | * | |
130 | * The std dev of the mean is related to the std dev by: | |
131 | * | |
132 | * s | |
133 | * s_mean = ------- | |
134 | * sqrt(n) | |
135 | * | |
506d4bc8 PZ |
136 | */ |
137 | static double stddev_stats(struct stats *stats) | |
138 | { | |
8a02631a PZ |
139 | double variance = stats->M2 / (stats->n - 1); |
140 | double variance_mean = variance / stats->n; | |
42202dd5 | 141 | |
63d40deb | 142 | return sqrt(variance_mean); |
506d4bc8 | 143 | } |
42202dd5 | 144 | |
506d4bc8 | 145 | struct stats event_res_stats[MAX_COUNTERS][3]; |
f5b4a9c3 SE |
146 | struct stats runtime_nsecs_stats[MAX_NR_CPUS]; |
147 | struct stats runtime_cycles_stats[MAX_NR_CPUS]; | |
148 | struct stats runtime_branches_stats[MAX_NR_CPUS]; | |
506d4bc8 | 149 | struct stats walltime_nsecs_stats; |
be1ac0d8 | 150 | |
b9ebdcc0 JSR |
151 | #define MATCH_EVENT(t, c, counter) \ |
152 | (attrs[counter].type == PERF_TYPE_##t && \ | |
153 | attrs[counter].config == PERF_COUNT_##c) | |
154 | ||
cca03c0a | 155 | #define ERR_PERF_OPEN \ |
d9cf837e | 156 | "counter %d, sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information." |
cca03c0a | 157 | |
d9cf837e | 158 | static int create_perf_stat_counter(int counter, bool *perm_err) |
ddcacfa0 | 159 | { |
cdd6c482 | 160 | struct perf_event_attr *attr = attrs + counter; |
d6d901c2 | 161 | int thread; |
084ab9f8 | 162 | int ncreated = 0; |
16c8a109 | 163 | |
ddcacfa0 | 164 | if (scale) |
a21ca2ca IM |
165 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
166 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
ddcacfa0 IM |
167 | |
168 | if (system_wide) { | |
c45c6ea2 | 169 | int cpu; |
f37a291c | 170 | |
cca03c0a | 171 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
d6d901c2 ZY |
172 | fd[cpu][counter][0] = sys_perf_event_open(attr, |
173 | -1, cpumap[cpu], -1, 0); | |
d9cf837e CA |
174 | if (fd[cpu][counter][0] < 0) { |
175 | if (errno == EPERM || errno == EACCES) | |
176 | *perm_err = true; | |
177 | error(ERR_PERF_OPEN, counter, | |
084ab9f8 | 178 | fd[cpu][counter][0], strerror(errno)); |
d9cf837e | 179 | } else { |
084ab9f8 | 180 | ++ncreated; |
d9cf837e | 181 | } |
ddcacfa0 IM |
182 | } |
183 | } else { | |
2e6cdf99 SE |
184 | attr->inherit = !no_inherit; |
185 | if (target_pid == -1 && target_tid == -1) { | |
6be2850e ZY |
186 | attr->disabled = 1; |
187 | attr->enable_on_exec = 1; | |
188 | } | |
d6d901c2 ZY |
189 | for (thread = 0; thread < thread_num; thread++) { |
190 | fd[0][counter][thread] = sys_perf_event_open(attr, | |
191 | all_tids[thread], -1, -1, 0); | |
d9cf837e CA |
192 | if (fd[0][counter][thread] < 0) { |
193 | if (errno == EPERM || errno == EACCES) | |
194 | *perm_err = true; | |
195 | error(ERR_PERF_OPEN, counter, | |
084ab9f8 ACM |
196 | fd[0][counter][thread], |
197 | strerror(errno)); | |
d9cf837e | 198 | } else { |
084ab9f8 | 199 | ++ncreated; |
d9cf837e | 200 | } |
d6d901c2 | 201 | } |
ddcacfa0 | 202 | } |
084ab9f8 ACM |
203 | |
204 | return ncreated; | |
ddcacfa0 IM |
205 | } |
206 | ||
c04f5e5d IM |
207 | /* |
208 | * Does the counter have nsecs as a unit? | |
209 | */ | |
210 | static inline int nsec_counter(int counter) | |
211 | { | |
b9ebdcc0 JSR |
212 | if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) || |
213 | MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) | |
c04f5e5d IM |
214 | return 1; |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | /* | |
2996f5dd | 220 | * Read out the results of a single counter: |
f5b4a9c3 | 221 | * aggregate counts across CPUs in system-wide mode |
c04f5e5d | 222 | */ |
f5b4a9c3 | 223 | static void read_counter_aggr(int counter) |
c04f5e5d | 224 | { |
849abde9 | 225 | u64 count[3], single_count[3]; |
c45c6ea2 | 226 | int cpu; |
f37a291c | 227 | size_t res, nv; |
c04f5e5d | 228 | int scaled; |
d6d901c2 | 229 | int i, thread; |
c04f5e5d IM |
230 | |
231 | count[0] = count[1] = count[2] = 0; | |
2996f5dd | 232 | |
c04f5e5d | 233 | nv = scale ? 3 : 1; |
cca03c0a | 234 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
d6d901c2 ZY |
235 | for (thread = 0; thread < thread_num; thread++) { |
236 | if (fd[cpu][counter][thread] < 0) | |
237 | continue; | |
238 | ||
239 | res = read(fd[cpu][counter][thread], | |
240 | single_count, nv * sizeof(u64)); | |
241 | assert(res == nv * sizeof(u64)); | |
242 | ||
243 | close(fd[cpu][counter][thread]); | |
244 | fd[cpu][counter][thread] = -1; | |
245 | ||
246 | count[0] += single_count[0]; | |
247 | if (scale) { | |
248 | count[1] += single_count[1]; | |
249 | count[2] += single_count[2]; | |
250 | } | |
c04f5e5d IM |
251 | } |
252 | } | |
253 | ||
254 | scaled = 0; | |
255 | if (scale) { | |
256 | if (count[2] == 0) { | |
9e9772c4 | 257 | event_scaled[counter] = -1; |
2996f5dd | 258 | count[0] = 0; |
c04f5e5d IM |
259 | return; |
260 | } | |
2996f5dd | 261 | |
c04f5e5d | 262 | if (count[2] < count[1]) { |
9e9772c4 | 263 | event_scaled[counter] = 1; |
c04f5e5d IM |
264 | count[0] = (unsigned long long) |
265 | ((double)count[0] * count[1] / count[2] + 0.5); | |
266 | } | |
267 | } | |
9e9772c4 PZ |
268 | |
269 | for (i = 0; i < 3; i++) | |
270 | update_stats(&event_res_stats[counter][i], count[i]); | |
271 | ||
272 | if (verbose) { | |
273 | fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter), | |
274 | count[0], count[1], count[2]); | |
275 | } | |
276 | ||
be1ac0d8 IM |
277 | /* |
278 | * Save the full runtime - to allow normalization during printout: | |
279 | */ | |
b9ebdcc0 | 280 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
f5b4a9c3 | 281 | update_stats(&runtime_nsecs_stats[0], count[0]); |
b9ebdcc0 | 282 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
f5b4a9c3 | 283 | update_stats(&runtime_cycles_stats[0], count[0]); |
11018201 | 284 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) |
f5b4a9c3 SE |
285 | update_stats(&runtime_branches_stats[0], count[0]); |
286 | } | |
287 | ||
288 | /* | |
289 | * Read out the results of a single counter: | |
290 | * do not aggregate counts across CPUs in system-wide mode | |
291 | */ | |
292 | static void read_counter(int counter) | |
293 | { | |
294 | u64 count[3]; | |
295 | int cpu; | |
296 | size_t res, nv; | |
297 | ||
298 | count[0] = count[1] = count[2] = 0; | |
299 | ||
300 | nv = scale ? 3 : 1; | |
301 | ||
302 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
303 | ||
304 | if (fd[cpu][counter][0] < 0) | |
305 | continue; | |
306 | ||
307 | res = read(fd[cpu][counter][0], count, nv * sizeof(u64)); | |
308 | ||
309 | assert(res == nv * sizeof(u64)); | |
310 | ||
311 | close(fd[cpu][counter][0]); | |
312 | fd[cpu][counter][0] = -1; | |
313 | ||
314 | if (scale) { | |
315 | if (count[2] == 0) { | |
316 | count[0] = 0; | |
317 | } else if (count[2] < count[1]) { | |
318 | count[0] = (unsigned long long) | |
319 | ((double)count[0] * count[1] / count[2] + 0.5); | |
320 | } | |
321 | } | |
322 | cpu_counts[cpu][counter].val = count[0]; /* scaled count */ | |
323 | cpu_counts[cpu][counter].ena = count[1]; | |
324 | cpu_counts[cpu][counter].run = count[2]; | |
325 | ||
326 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) | |
327 | update_stats(&runtime_nsecs_stats[cpu], count[0]); | |
328 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) | |
329 | update_stats(&runtime_cycles_stats[cpu], count[0]); | |
330 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) | |
331 | update_stats(&runtime_branches_stats[cpu], count[0]); | |
332 | } | |
2996f5dd IM |
333 | } |
334 | ||
f37a291c | 335 | static int run_perf_stat(int argc __used, const char **argv) |
42202dd5 IM |
336 | { |
337 | unsigned long long t0, t1; | |
338 | int status = 0; | |
084ab9f8 | 339 | int counter, ncreated = 0; |
051ae7f7 | 340 | int child_ready_pipe[2], go_pipe[2]; |
d9cf837e | 341 | bool perm_err = false; |
6be2850e | 342 | const bool forks = (argc > 0); |
051ae7f7 | 343 | char buf; |
42202dd5 IM |
344 | |
345 | if (!system_wide) | |
346 | nr_cpus = 1; | |
347 | ||
60666c63 | 348 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
051ae7f7 PM |
349 | perror("failed to create pipes"); |
350 | exit(1); | |
351 | } | |
352 | ||
60666c63 | 353 | if (forks) { |
6be2850e | 354 | if ((child_pid = fork()) < 0) |
60666c63 LW |
355 | perror("failed to fork"); |
356 | ||
6be2850e | 357 | if (!child_pid) { |
60666c63 LW |
358 | close(child_ready_pipe[0]); |
359 | close(go_pipe[1]); | |
360 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
361 | ||
362 | /* | |
363 | * Do a dummy execvp to get the PLT entry resolved, | |
364 | * so we avoid the resolver overhead on the real | |
365 | * execvp call. | |
366 | */ | |
367 | execvp("", (char **)argv); | |
368 | ||
369 | /* | |
370 | * Tell the parent we're ready to go | |
371 | */ | |
372 | close(child_ready_pipe[1]); | |
373 | ||
374 | /* | |
375 | * Wait until the parent tells us to go. | |
376 | */ | |
377 | if (read(go_pipe[0], &buf, 1) == -1) | |
378 | perror("unable to read pipe"); | |
379 | ||
380 | execvp(argv[0], (char **)argv); | |
381 | ||
382 | perror(argv[0]); | |
383 | exit(-1); | |
384 | } | |
051ae7f7 | 385 | |
d6d901c2 ZY |
386 | if (target_tid == -1 && target_pid == -1 && !system_wide) |
387 | all_tids[0] = child_pid; | |
388 | ||
051ae7f7 | 389 | /* |
60666c63 | 390 | * Wait for the child to be ready to exec. |
051ae7f7 PM |
391 | */ |
392 | close(child_ready_pipe[1]); | |
60666c63 LW |
393 | close(go_pipe[0]); |
394 | if (read(child_ready_pipe[0], &buf, 1) == -1) | |
a92bef0f | 395 | perror("unable to read pipe"); |
60666c63 | 396 | close(child_ready_pipe[0]); |
051ae7f7 PM |
397 | } |
398 | ||
42202dd5 | 399 | for (counter = 0; counter < nr_counters; counter++) |
d9cf837e CA |
400 | ncreated += create_perf_stat_counter(counter, &perm_err); |
401 | ||
402 | if (ncreated < nr_counters) { | |
403 | if (perm_err) | |
404 | error("You may not have permission to collect %sstats.\n" | |
405 | "\t Consider tweaking" | |
406 | " /proc/sys/kernel/perf_event_paranoid or running as root.", | |
407 | system_wide ? "system-wide " : ""); | |
408 | die("Not all events could be opened.\n"); | |
084ab9f8 ACM |
409 | if (child_pid != -1) |
410 | kill(child_pid, SIGTERM); | |
411 | return -1; | |
412 | } | |
42202dd5 IM |
413 | |
414 | /* | |
415 | * Enable counters and exec the command: | |
416 | */ | |
417 | t0 = rdclock(); | |
42202dd5 | 418 | |
60666c63 LW |
419 | if (forks) { |
420 | close(go_pipe[1]); | |
421 | wait(&status); | |
422 | } else { | |
6be2850e | 423 | while(!done) sleep(1); |
60666c63 | 424 | } |
42202dd5 | 425 | |
42202dd5 IM |
426 | t1 = rdclock(); |
427 | ||
9e9772c4 | 428 | update_stats(&walltime_nsecs_stats, t1 - t0); |
42202dd5 | 429 | |
f5b4a9c3 SE |
430 | if (no_aggr) { |
431 | for (counter = 0; counter < nr_counters; counter++) | |
432 | read_counter(counter); | |
433 | } else { | |
434 | for (counter = 0; counter < nr_counters; counter++) | |
435 | read_counter_aggr(counter); | |
436 | } | |
42202dd5 IM |
437 | return WEXITSTATUS(status); |
438 | } | |
439 | ||
849abde9 | 440 | static void print_noise(int counter, double avg) |
42202dd5 | 441 | { |
849abde9 PZ |
442 | if (run_count == 1) |
443 | return; | |
444 | ||
445 | fprintf(stderr, " ( +- %7.3f%% )", | |
446 | 100 * stddev_stats(&event_res_stats[counter][0]) / avg); | |
42202dd5 IM |
447 | } |
448 | ||
f5b4a9c3 | 449 | static void nsec_printout(int cpu, int counter, double avg) |
44175b6f | 450 | { |
506d4bc8 | 451 | double msecs = avg / 1e6; |
44175b6f | 452 | |
f5b4a9c3 SE |
453 | if (no_aggr) |
454 | fprintf(stderr, "CPU%-4d %18.6f %-24s", | |
455 | cpumap[cpu], msecs, event_name(counter)); | |
456 | else | |
457 | fprintf(stderr, " %18.6f %-24s", msecs, event_name(counter)); | |
44175b6f | 458 | |
b9ebdcc0 | 459 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { |
506d4bc8 PZ |
460 | fprintf(stderr, " # %10.3f CPUs ", |
461 | avg / avg_stats(&walltime_nsecs_stats)); | |
44175b6f IM |
462 | } |
463 | } | |
464 | ||
f5b4a9c3 | 465 | static void abs_printout(int cpu, int counter, double avg) |
44175b6f | 466 | { |
c7f7fea3 | 467 | double total, ratio = 0.0; |
f5b4a9c3 SE |
468 | char cpustr[16] = { '\0', }; |
469 | ||
470 | if (no_aggr) | |
471 | sprintf(cpustr, "CPU%-4d", cpumap[cpu]); | |
472 | else | |
473 | cpu = 0; | |
c7f7fea3 | 474 | |
5af52b51 | 475 | if (big_num) |
f5b4a9c3 SE |
476 | fprintf(stderr, "%s %'18.0f %-24s", |
477 | cpustr, avg, event_name(counter)); | |
5af52b51 | 478 | else |
f5b4a9c3 SE |
479 | fprintf(stderr, "%s %18.0f %-24s", |
480 | cpustr, avg, event_name(counter)); | |
44175b6f | 481 | |
506d4bc8 | 482 | if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { |
f5b4a9c3 | 483 | total = avg_stats(&runtime_cycles_stats[cpu]); |
c7f7fea3 IM |
484 | |
485 | if (total) | |
486 | ratio = avg / total; | |
487 | ||
488 | fprintf(stderr, " # %10.3f IPC ", ratio); | |
7255fe2a | 489 | } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) && |
f5b4a9c3 SE |
490 | runtime_branches_stats[cpu].n != 0) { |
491 | total = avg_stats(&runtime_branches_stats[cpu]); | |
11018201 AB |
492 | |
493 | if (total) | |
494 | ratio = avg * 100 / total; | |
495 | ||
dd86e72a | 496 | fprintf(stderr, " # %10.3f %% ", ratio); |
11018201 | 497 | |
f5b4a9c3 SE |
498 | } else if (runtime_nsecs_stats[cpu].n != 0) { |
499 | total = avg_stats(&runtime_nsecs_stats[cpu]); | |
c7f7fea3 IM |
500 | |
501 | if (total) | |
502 | ratio = 1000.0 * avg / total; | |
503 | ||
504 | fprintf(stderr, " # %10.3f M/sec", ratio); | |
44175b6f | 505 | } |
44175b6f IM |
506 | } |
507 | ||
2996f5dd IM |
508 | /* |
509 | * Print out the results of a single counter: | |
f5b4a9c3 | 510 | * aggregated counts in system-wide mode |
2996f5dd | 511 | */ |
f5b4a9c3 | 512 | static void print_counter_aggr(int counter) |
2996f5dd | 513 | { |
849abde9 | 514 | double avg = avg_stats(&event_res_stats[counter][0]); |
63d40deb | 515 | int scaled = event_scaled[counter]; |
2996f5dd | 516 | |
2996f5dd | 517 | if (scaled == -1) { |
5af52b51 | 518 | fprintf(stderr, " %18s %-24s\n", |
2996f5dd IM |
519 | "<not counted>", event_name(counter)); |
520 | return; | |
521 | } | |
c04f5e5d | 522 | |
44175b6f | 523 | if (nsec_counter(counter)) |
f5b4a9c3 | 524 | nsec_printout(-1, counter, avg); |
44175b6f | 525 | else |
f5b4a9c3 | 526 | abs_printout(-1, counter, avg); |
849abde9 PZ |
527 | |
528 | print_noise(counter, avg); | |
506d4bc8 PZ |
529 | |
530 | if (scaled) { | |
531 | double avg_enabled, avg_running; | |
532 | ||
533 | avg_enabled = avg_stats(&event_res_stats[counter][1]); | |
534 | avg_running = avg_stats(&event_res_stats[counter][2]); | |
d7c29318 | 535 | |
210ad39f | 536 | fprintf(stderr, " (scaled from %.2f%%)", |
506d4bc8 PZ |
537 | 100 * avg_running / avg_enabled); |
538 | } | |
44175b6f | 539 | |
c04f5e5d IM |
540 | fprintf(stderr, "\n"); |
541 | } | |
542 | ||
f5b4a9c3 SE |
543 | /* |
544 | * Print out the results of a single counter: | |
545 | * does not use aggregated count in system-wide | |
546 | */ | |
547 | static void print_counter(int counter) | |
548 | { | |
549 | u64 ena, run, val; | |
550 | int cpu; | |
551 | ||
552 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
553 | val = cpu_counts[cpu][counter].val; | |
554 | ena = cpu_counts[cpu][counter].ena; | |
555 | run = cpu_counts[cpu][counter].run; | |
556 | if (run == 0 || ena == 0) { | |
557 | fprintf(stderr, "CPU%-4d %18s %-24s", cpumap[cpu], | |
558 | "<not counted>", event_name(counter)); | |
559 | ||
560 | fprintf(stderr, "\n"); | |
561 | continue; | |
562 | } | |
563 | ||
564 | if (nsec_counter(counter)) | |
565 | nsec_printout(cpu, counter, val); | |
566 | else | |
567 | abs_printout(cpu, counter, val); | |
568 | ||
569 | print_noise(counter, 1.0); | |
570 | ||
571 | if (run != ena) { | |
572 | fprintf(stderr, " (scaled from %.2f%%)", | |
573 | 100.0 * run / ena); | |
574 | } | |
575 | fprintf(stderr, "\n"); | |
576 | } | |
577 | } | |
578 | ||
42202dd5 IM |
579 | static void print_stat(int argc, const char **argv) |
580 | { | |
581 | int i, counter; | |
582 | ||
ddcacfa0 IM |
583 | fflush(stdout); |
584 | ||
585 | fprintf(stderr, "\n"); | |
60666c63 | 586 | fprintf(stderr, " Performance counter stats for "); |
d6d901c2 | 587 | if(target_pid == -1 && target_tid == -1) { |
60666c63 LW |
588 | fprintf(stderr, "\'%s", argv[0]); |
589 | for (i = 1; i < argc; i++) | |
590 | fprintf(stderr, " %s", argv[i]); | |
d6d901c2 ZY |
591 | } else if (target_pid != -1) |
592 | fprintf(stderr, "process id \'%d", target_pid); | |
593 | else | |
594 | fprintf(stderr, "thread id \'%d", target_tid); | |
44db76c8 | 595 | |
42202dd5 IM |
596 | fprintf(stderr, "\'"); |
597 | if (run_count > 1) | |
598 | fprintf(stderr, " (%d runs)", run_count); | |
599 | fprintf(stderr, ":\n\n"); | |
2996f5dd | 600 | |
f5b4a9c3 SE |
601 | if (no_aggr) { |
602 | for (counter = 0; counter < nr_counters; counter++) | |
603 | print_counter(counter); | |
604 | } else { | |
605 | for (counter = 0; counter < nr_counters; counter++) | |
606 | print_counter_aggr(counter); | |
607 | } | |
ddcacfa0 | 608 | |
ddcacfa0 | 609 | fprintf(stderr, "\n"); |
5af52b51 | 610 | fprintf(stderr, " %18.9f seconds time elapsed", |
506d4bc8 | 611 | avg_stats(&walltime_nsecs_stats)/1e9); |
566747e6 IM |
612 | if (run_count > 1) { |
613 | fprintf(stderr, " ( +- %7.3f%% )", | |
506d4bc8 PZ |
614 | 100*stddev_stats(&walltime_nsecs_stats) / |
615 | avg_stats(&walltime_nsecs_stats)); | |
566747e6 IM |
616 | } |
617 | fprintf(stderr, "\n\n"); | |
ddcacfa0 IM |
618 | } |
619 | ||
f7b7c26e PZ |
620 | static volatile int signr = -1; |
621 | ||
5242519b | 622 | static void skip_signal(int signo) |
ddcacfa0 | 623 | { |
6be2850e | 624 | if(child_pid == -1) |
60666c63 LW |
625 | done = 1; |
626 | ||
f7b7c26e PZ |
627 | signr = signo; |
628 | } | |
629 | ||
630 | static void sig_atexit(void) | |
631 | { | |
933da83a CW |
632 | if (child_pid != -1) |
633 | kill(child_pid, SIGTERM); | |
634 | ||
f7b7c26e PZ |
635 | if (signr == -1) |
636 | return; | |
637 | ||
638 | signal(signr, SIG_DFL); | |
639 | kill(getpid(), signr); | |
5242519b IM |
640 | } |
641 | ||
642 | static const char * const stat_usage[] = { | |
60666c63 | 643 | "perf stat [<options>] [<command>]", |
5242519b IM |
644 | NULL |
645 | }; | |
646 | ||
5242519b IM |
647 | static const struct option options[] = { |
648 | OPT_CALLBACK('e', "event", NULL, "event", | |
86847b62 TG |
649 | "event selector. use 'perf list' to list available events", |
650 | parse_events), | |
2e6cdf99 SE |
651 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
652 | "child tasks do not inherit counters"), | |
5242519b | 653 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
654 | "stat events on existing process id"), |
655 | OPT_INTEGER('t', "tid", &target_tid, | |
656 | "stat events on existing thread id"), | |
5242519b | 657 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
3d632595 | 658 | "system-wide collection from all CPUs"), |
b26bc5a7 | 659 | OPT_BOOLEAN('c', "scale", &scale, |
3d632595 | 660 | "scale/normalize counters"), |
c0555642 | 661 | OPT_INCR('v', "verbose", &verbose, |
743ee1f8 | 662 | "be more verbose (show counter open errors, etc)"), |
42202dd5 IM |
663 | OPT_INTEGER('r', "repeat", &run_count, |
664 | "repeat command and print average + stddev (max: 100)"), | |
0cfb7a13 IM |
665 | OPT_BOOLEAN('n', "null", &null_run, |
666 | "null run - dont start any counters"), | |
5af52b51 SE |
667 | OPT_BOOLEAN('B', "big-num", &big_num, |
668 | "print large numbers with thousands\' separators"), | |
c45c6ea2 SE |
669 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
670 | "list of cpus to monitor in system-wide"), | |
f5b4a9c3 SE |
671 | OPT_BOOLEAN('A', "no-aggr", &no_aggr, |
672 | "disable CPU count aggregation"), | |
5242519b IM |
673 | OPT_END() |
674 | }; | |
675 | ||
f37a291c | 676 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
5242519b | 677 | { |
42202dd5 | 678 | int status; |
d6d901c2 | 679 | int i,j; |
42202dd5 | 680 | |
5af52b51 SE |
681 | setlocale(LC_ALL, ""); |
682 | ||
a0541234 AB |
683 | argc = parse_options(argc, argv, options, stat_usage, |
684 | PARSE_OPT_STOP_AT_NON_OPTION); | |
d6d901c2 | 685 | if (!argc && target_pid == -1 && target_tid == -1) |
5242519b | 686 | usage_with_options(stat_usage, options); |
9e9772c4 | 687 | if (run_count <= 0) |
42202dd5 | 688 | usage_with_options(stat_usage, options); |
ddcacfa0 | 689 | |
f5b4a9c3 SE |
690 | /* no_aggr is for system-wide only */ |
691 | if (no_aggr && !system_wide) | |
692 | usage_with_options(stat_usage, options); | |
693 | ||
c3043569 JSR |
694 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
695 | if (!null_run && !nr_counters) { | |
696 | memcpy(attrs, default_attrs, sizeof(default_attrs)); | |
697 | nr_counters = ARRAY_SIZE(default_attrs); | |
698 | } | |
ddcacfa0 | 699 | |
a12b51c4 | 700 | if (system_wide) |
c45c6ea2 | 701 | nr_cpus = read_cpu_map(cpu_list); |
a12b51c4 PM |
702 | else |
703 | nr_cpus = 1; | |
ddcacfa0 | 704 | |
c45c6ea2 SE |
705 | if (nr_cpus < 1) |
706 | usage_with_options(stat_usage, options); | |
707 | ||
d6d901c2 ZY |
708 | if (target_pid != -1) { |
709 | target_tid = target_pid; | |
710 | thread_num = find_all_tid(target_pid, &all_tids); | |
711 | if (thread_num <= 0) { | |
712 | fprintf(stderr, "Can't find all threads of pid %d\n", | |
713 | target_pid); | |
714 | usage_with_options(stat_usage, options); | |
715 | } | |
716 | } else { | |
717 | all_tids=malloc(sizeof(pid_t)); | |
718 | if (!all_tids) | |
719 | return -ENOMEM; | |
720 | ||
721 | all_tids[0] = target_tid; | |
722 | thread_num = 1; | |
723 | } | |
724 | ||
725 | for (i = 0; i < MAX_NR_CPUS; i++) { | |
726 | for (j = 0; j < MAX_COUNTERS; j++) { | |
727 | fd[i][j] = malloc(sizeof(int)*thread_num); | |
728 | if (!fd[i][j]) | |
729 | return -ENOMEM; | |
730 | } | |
731 | } | |
732 | ||
58d7e993 IM |
733 | /* |
734 | * We dont want to block the signals - that would cause | |
735 | * child tasks to inherit that and Ctrl-C would not work. | |
736 | * What we want is for Ctrl-C to work in the exec()-ed | |
737 | * task, but being ignored by perf stat itself: | |
738 | */ | |
f7b7c26e | 739 | atexit(sig_atexit); |
58d7e993 IM |
740 | signal(SIGINT, skip_signal); |
741 | signal(SIGALRM, skip_signal); | |
742 | signal(SIGABRT, skip_signal); | |
743 | ||
42202dd5 IM |
744 | status = 0; |
745 | for (run_idx = 0; run_idx < run_count; run_idx++) { | |
746 | if (run_count != 1 && verbose) | |
3d632595 | 747 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
42202dd5 IM |
748 | status = run_perf_stat(argc, argv); |
749 | } | |
750 | ||
084ab9f8 ACM |
751 | if (status != -1) |
752 | print_stat(argc, argv); | |
42202dd5 IM |
753 | |
754 | return status; | |
ddcacfa0 | 755 | } |