blob: 065e79eb2142410abc2d0bfc291ceb8bcf881ae4 [file] [log] [blame]
Ingo Molnarddcacfa2009-04-20 15:37:32 +02001/*
Ingo Molnarbf9e1872009-06-02 23:37:05 +02002 * 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:
Ingo Molnarddcacfa2009-04-20 15:37:32 +02008
Ingo Molnarbf9e1872009-06-02 23:37:05 +02009 $ perf stat ~/hackbench 10
10 Time: 0.104
Ingo Molnarddcacfa2009-04-20 15:37:32 +020011
Ingo Molnarbf9e1872009-06-02 23:37:05 +020012 Performance counter stats for '/home/mingo/hackbench':
Ingo Molnarddcacfa2009-04-20 15:37:32 +020013
Ingo Molnarbf9e1872009-06-02 23:37:05 +020014 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
Ingo Molnarddcacfa2009-04-20 15:37:32 +020022
Ingo Molnarbf9e1872009-06-02 23:37:05 +020023 Wall-clock time elapsed: 123.786620 msecs
Ingo Molnarddcacfa2009-04-20 15:37:32 +020024
Ingo Molnar52425192009-05-26 09:17:18 +020025 *
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>
Jaswinder Singh Rajput6e750a8f2009-06-27 03:02:07 +053035 * Jaswinder Singh Rajput <jaswinder@kernel.org>
Ingo Molnar52425192009-05-26 09:17:18 +020036 *
37 * Released under the GPL v2. (and only v2, not any later version)
Ingo Molnarddcacfa2009-04-20 15:37:32 +020038 */
39
Peter Zijlstra1a482f32009-05-23 18:28:58 +020040#include "perf.h"
Ingo Molnar16f762a2009-05-27 09:10:38 +020041#include "builtin.h"
Ingo Molnar148be2c2009-04-27 08:02:14 +020042#include "util/util.h"
Ingo Molnar52425192009-05-26 09:17:18 +020043#include "util/parse-options.h"
44#include "util/parse-events.h"
Frederic Weisbecker8f28827a2009-08-16 22:05:48 +020045#include "util/event.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020046#include "util/evsel.h"
Frederic Weisbecker8f28827a2009-08-16 22:05:48 +020047#include "util/debug.h"
Liming Wang60666c62009-12-31 16:05:50 +080048#include "util/header.h"
Paul Mackerrasa12b51c2010-03-10 20:36:09 +110049#include "util/cpumap.h"
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030050#include "util/thread.h"
Ingo Molnarddcacfa2009-04-20 15:37:32 +020051
Ingo Molnarddcacfa2009-04-20 15:37:32 +020052#include <sys/prctl.h>
Ingo Molnar42202dd2009-06-13 14:57:28 +020053#include <math.h>
Stephane Eranian5af52b52010-05-18 15:00:01 +020054#include <locale.h>
Peter Zijlstra16c8a102009-05-05 17:50:27 +020055
Stephane Eraniand7470b62010-12-01 18:49:05 +020056#define DEFAULT_SEPARATOR " "
57
Ingo Molnarcdd6c482009-09-21 12:02:48 +020058static struct perf_event_attr default_attrs[] = {
Ingo Molnara21ca2c2009-06-06 09:58:57 +020059
Ingo Molnar56aab462009-10-19 13:27:08 +020060 { .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 },
Ingo Molnara21ca2c2009-06-06 09:58:57 +020064
Ingo Molnar56aab462009-10-19 13:27:08 +020065 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
66 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
Ingo Molnar56aab462009-10-19 13:27:08 +020067 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
68 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
Ingo Molnardd86e722009-10-19 13:33:03 +020069 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES },
70 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
Peter Zijlstraf4dbfa82009-06-11 14:06:28 +020071
Ingo Molnara21ca2c2009-06-06 09:58:57 +020072};
73
Ian Munsiec0555642010-04-13 18:37:33 +100074static bool system_wide = false;
Stephane Eranianc45c6ea2010-05-28 12:00:01 +020075static int nr_cpus = 0;
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +053076static int run_idx = 0;
77
78static int run_count = 1;
Stephane Eranian2e6cdf92010-05-12 10:40:01 +020079static bool no_inherit = false;
Ian Munsiec0555642010-04-13 18:37:33 +100080static bool scale = true;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +020081static bool no_aggr = false;
Chris Wilson933da832009-10-04 01:35:01 +010082static pid_t target_pid = -1;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030083static pid_t target_tid = -1;
84static pid_t *all_tids = NULL;
85static int thread_num = 0;
Chris Wilson933da832009-10-04 01:35:01 +010086static pid_t child_pid = -1;
Ian Munsiec0555642010-04-13 18:37:33 +100087static bool null_run = false;
Arnaldo Carvalho de Melo201e0b02010-12-01 17:53:27 -020088static bool big_num = true;
Stephane Eraniand7470b62010-12-01 18:49:05 +020089static int big_num_opt = -1;
Stephane Eranianc45c6ea2010-05-28 12:00:01 +020090static const char *cpu_list;
Stephane Eraniand7470b62010-12-01 18:49:05 +020091static const char *csv_sep = NULL;
92static bool csv_output = false;
Stephane Eranian5af52b52010-05-18 15:00:01 +020093
Liming Wang60666c62009-12-31 16:05:50 +080094static volatile int done = 0;
95
Peter Zijlstra506d4bc2009-09-04 15:36:12 +020096struct stats
97{
Peter Zijlstra8a026312009-09-04 17:26:26 +020098 double n, mean, M2;
Peter Zijlstra506d4bc2009-09-04 15:36:12 +020099};
Ingo Molnar42202dd2009-06-13 14:57:28 +0200100
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200101struct perf_stat {
102 struct stats res_stats[3];
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200103};
104
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200105static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200106{
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200107 evsel->priv = zalloc(sizeof(struct perf_stat));
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200108 return evsel->priv == NULL ? -ENOMEM : 0;
109}
110
111static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
112{
113 free(evsel->priv);
114 evsel->priv = NULL;
115}
116
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200117static void update_stats(struct stats *stats, u64 val)
118{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200119 double delta;
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200120
Peter Zijlstra8a026312009-09-04 17:26:26 +0200121 stats->n++;
122 delta = val - stats->mean;
123 stats->mean += delta / stats->n;
124 stats->M2 += delta*(val - stats->mean);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200125}
126
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200127static double avg_stats(struct stats *stats)
128{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200129 return stats->mean;
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200130}
Ingo Molnar42202dd2009-06-13 14:57:28 +0200131
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200132/*
Peter Zijlstra63d40de2009-09-04 17:03:13 +0200133 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
134 *
Peter Zijlstra8a026312009-09-04 17:26:26 +0200135 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
136 * s^2 = -------------------------------
137 * n - 1
Peter Zijlstra63d40de2009-09-04 17:03:13 +0200138 *
139 * http://en.wikipedia.org/wiki/Stddev
140 *
141 * The std dev of the mean is related to the std dev by:
142 *
143 * s
144 * s_mean = -------
145 * sqrt(n)
146 *
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200147 */
148static double stddev_stats(struct stats *stats)
149{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200150 double variance = stats->M2 / (stats->n - 1);
151 double variance_mean = variance / stats->n;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200152
Peter Zijlstra63d40de2009-09-04 17:03:13 +0200153 return sqrt(variance_mean);
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200154}
Ingo Molnar42202dd2009-06-13 14:57:28 +0200155
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200156struct stats runtime_nsecs_stats[MAX_NR_CPUS];
157struct stats runtime_cycles_stats[MAX_NR_CPUS];
158struct stats runtime_branches_stats[MAX_NR_CPUS];
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200159struct stats walltime_nsecs_stats;
Ingo Molnarbe1ac0d2009-05-29 09:10:54 +0200160
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200161static int create_perf_stat_counter(struct perf_evsel *evsel)
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200162{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200163 struct perf_event_attr *attr = &evsel->attr;
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200164
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200165 if (scale)
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200166 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
167 PERF_FORMAT_TOTAL_TIME_RUNNING;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200168
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200169 if (system_wide)
170 return perf_evsel__open_per_cpu(evsel, nr_cpus, cpumap);
Ingo Molnarf37a2912009-07-01 12:37:06 +0200171
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200172 attr->inherit = !no_inherit;
173 if (target_pid == -1 && target_tid == -1) {
174 attr->disabled = 1;
175 attr->enable_on_exec = 1;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200176 }
Arnaldo Carvalho de Melo084ab9f2010-03-22 13:10:28 -0300177
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200178 return perf_evsel__open_per_thread(evsel, thread_num, all_tids);
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200179}
180
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200181/*
182 * Does the counter have nsecs as a unit?
183 */
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200184static inline int nsec_counter(struct perf_evsel *evsel)
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200185{
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200186 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
187 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200188 return 1;
189
190 return 0;
191}
192
193/*
Ingo Molnar2996f5d2009-05-29 09:10:54 +0200194 * Read out the results of a single counter:
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200195 * aggregate counts across CPUs in system-wide mode
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200196 */
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200197static int read_counter_aggr(struct perf_evsel *counter)
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200198{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200199 struct perf_stat *ps = counter->priv;
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200200 u64 *count = counter->counts->aggr.values;
201 int i;
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200202
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200203 if (__perf_evsel__read(counter, nr_cpus, thread_num, scale) < 0)
204 return -1;
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200205
206 for (i = 0; i < 3; i++)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200207 update_stats(&ps->res_stats[i], count[i]);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200208
209 if (verbose) {
210 fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter),
211 count[0], count[1], count[2]);
212 }
213
Ingo Molnarbe1ac0d2009-05-29 09:10:54 +0200214 /*
215 * Save the full runtime - to allow normalization during printout:
216 */
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200217 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200218 update_stats(&runtime_nsecs_stats[0], count[0]);
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200219 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200220 update_stats(&runtime_cycles_stats[0], count[0]);
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200221 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200222 update_stats(&runtime_branches_stats[0], count[0]);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200223
224 return 0;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200225}
226
227/*
228 * Read out the results of a single counter:
229 * do not aggregate counts across CPUs in system-wide mode
230 */
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200231static int read_counter(struct perf_evsel *counter)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200232{
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200233 u64 *count;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200234 int cpu;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200235
236 for (cpu = 0; cpu < nr_cpus; cpu++) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200237 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
238 return -1;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200239
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200240 count = counter->counts->cpu[cpu].values;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200241
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200242 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200243 update_stats(&runtime_nsecs_stats[cpu], count[0]);
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200244 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200245 update_stats(&runtime_cycles_stats[cpu], count[0]);
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200246 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200247 update_stats(&runtime_branches_stats[cpu], count[0]);
248 }
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200249
250 return 0;
Ingo Molnar2996f5d2009-05-29 09:10:54 +0200251}
252
Ingo Molnarf37a2912009-07-01 12:37:06 +0200253static int run_perf_stat(int argc __used, const char **argv)
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200254{
255 unsigned long long t0, t1;
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200256 struct perf_evsel *counter;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200257 int status = 0;
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000258 int child_ready_pipe[2], go_pipe[2];
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300259 const bool forks = (argc > 0);
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000260 char buf;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200261
262 if (!system_wide)
263 nr_cpus = 1;
264
Liming Wang60666c62009-12-31 16:05:50 +0800265 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000266 perror("failed to create pipes");
267 exit(1);
268 }
269
Liming Wang60666c62009-12-31 16:05:50 +0800270 if (forks) {
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300271 if ((child_pid = fork()) < 0)
Liming Wang60666c62009-12-31 16:05:50 +0800272 perror("failed to fork");
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000273
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300274 if (!child_pid) {
Liming Wang60666c62009-12-31 16:05:50 +0800275 close(child_ready_pipe[0]);
276 close(go_pipe[1]);
277 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
278
279 /*
280 * Do a dummy execvp to get the PLT entry resolved,
281 * so we avoid the resolver overhead on the real
282 * execvp call.
283 */
284 execvp("", (char **)argv);
285
286 /*
287 * Tell the parent we're ready to go
288 */
289 close(child_ready_pipe[1]);
290
291 /*
292 * Wait until the parent tells us to go.
293 */
294 if (read(go_pipe[0], &buf, 1) == -1)
295 perror("unable to read pipe");
296
297 execvp(argv[0], (char **)argv);
298
299 perror(argv[0]);
300 exit(-1);
301 }
302
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300303 if (target_tid == -1 && target_pid == -1 && !system_wide)
304 all_tids[0] = child_pid;
305
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000306 /*
Liming Wang60666c62009-12-31 16:05:50 +0800307 * Wait for the child to be ready to exec.
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000308 */
309 close(child_ready_pipe[1]);
Liming Wang60666c62009-12-31 16:05:50 +0800310 close(go_pipe[0]);
311 if (read(child_ready_pipe[0], &buf, 1) == -1)
Frederic Weisbeckera92bef02009-07-01 21:02:10 +0200312 perror("unable to read pipe");
Liming Wang60666c62009-12-31 16:05:50 +0800313 close(child_ready_pipe[0]);
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000314 }
315
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200316 list_for_each_entry(counter, &evsel_list, node) {
317 if (create_perf_stat_counter(counter) < 0) {
318 if (errno == -EPERM || errno == -EACCES) {
319 error("You may not have permission to collect %sstats.\n"
320 "\t Consider tweaking"
321 " /proc/sys/kernel/perf_event_paranoid or running as root.",
322 system_wide ? "system-wide " : "");
323 } else {
324 error("open_counter returned with %d (%s). "
325 "/bin/dmesg may provide additional information.\n",
326 errno, strerror(errno));
327 }
328 if (child_pid != -1)
329 kill(child_pid, SIGTERM);
330 die("Not all events could be opened.\n");
331 return -1;
332 }
Arnaldo Carvalho de Melo084ab9f2010-03-22 13:10:28 -0300333 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200334
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200335 /*
336 * Enable counters and exec the command:
337 */
338 t0 = rdclock();
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200339
Liming Wang60666c62009-12-31 16:05:50 +0800340 if (forks) {
341 close(go_pipe[1]);
342 wait(&status);
343 } else {
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300344 while(!done) sleep(1);
Liming Wang60666c62009-12-31 16:05:50 +0800345 }
Ingo Molnar44db76c2009-06-03 19:36:07 +0200346
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200347 t1 = rdclock();
348
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200349 update_stats(&walltime_nsecs_stats, t1 - t0);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200350
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200351 if (no_aggr) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200352 list_for_each_entry(counter, &evsel_list, node) {
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200353 read_counter(counter);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200354 perf_evsel__close_fd(counter, nr_cpus, 1);
355 }
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200356 } else {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200357 list_for_each_entry(counter, &evsel_list, node) {
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200358 read_counter_aggr(counter);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200359 perf_evsel__close_fd(counter, nr_cpus, thread_num);
360 }
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200361 }
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200362
Ingo Molnar42202dd2009-06-13 14:57:28 +0200363 return WEXITSTATUS(status);
364}
365
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200366static void print_noise(struct perf_evsel *evsel, double avg)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200367{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200368 struct perf_stat *ps;
369
Peter Zijlstra849abde2009-09-04 18:23:38 +0200370 if (run_count == 1)
371 return;
372
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200373 ps = evsel->priv;
Peter Zijlstra849abde2009-09-04 18:23:38 +0200374 fprintf(stderr, " ( +- %7.3f%% )",
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200375 100 * stddev_stats(&ps->res_stats[0]) / avg);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200376}
377
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200378static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200379{
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200380 double msecs = avg / 1e6;
Stephane Eraniand7470b62010-12-01 18:49:05 +0200381 char cpustr[16] = { '\0', };
382 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
Ingo Molnar42202dd2009-06-13 14:57:28 +0200383
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200384 if (no_aggr)
Stephane Eraniand7470b62010-12-01 18:49:05 +0200385 sprintf(cpustr, "CPU%*d%s",
386 csv_output ? 0 : -4,
387 cpumap[cpu], csv_sep);
388
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200389 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
Stephane Eraniand7470b62010-12-01 18:49:05 +0200390
391 if (csv_output)
392 return;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200393
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200394 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200395 fprintf(stderr, " # %10.3f CPUs ",
396 avg / avg_stats(&walltime_nsecs_stats));
Ingo Molnar42202dd2009-06-13 14:57:28 +0200397}
398
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200399static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200400{
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200401 double total, ratio = 0.0;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200402 char cpustr[16] = { '\0', };
Stephane Eraniand7470b62010-12-01 18:49:05 +0200403 const char *fmt;
404
405 if (csv_output)
406 fmt = "%s%.0f%s%s";
407 else if (big_num)
408 fmt = "%s%'18.0f%s%-24s";
409 else
410 fmt = "%s%18.0f%s%-24s";
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200411
412 if (no_aggr)
Stephane Eraniand7470b62010-12-01 18:49:05 +0200413 sprintf(cpustr, "CPU%*d%s",
414 csv_output ? 0 : -4,
415 cpumap[cpu], csv_sep);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200416 else
417 cpu = 0;
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200418
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200419 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
Stephane Eraniand7470b62010-12-01 18:49:05 +0200420
421 if (csv_output)
422 return;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200423
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200424 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200425 total = avg_stats(&runtime_cycles_stats[cpu]);
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200426
427 if (total)
428 ratio = avg / total;
429
430 fprintf(stderr, " # %10.3f IPC ", ratio);
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200431 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200432 runtime_branches_stats[cpu].n != 0) {
433 total = avg_stats(&runtime_branches_stats[cpu]);
Anton Blanchard11018202009-10-18 22:29:23 +1100434
435 if (total)
436 ratio = avg * 100 / total;
437
Ingo Molnardd86e722009-10-19 13:33:03 +0200438 fprintf(stderr, " # %10.3f %% ", ratio);
Anton Blanchard11018202009-10-18 22:29:23 +1100439
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200440 } else if (runtime_nsecs_stats[cpu].n != 0) {
441 total = avg_stats(&runtime_nsecs_stats[cpu]);
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200442
443 if (total)
444 ratio = 1000.0 * avg / total;
445
446 fprintf(stderr, " # %10.3f M/sec", ratio);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200447 }
Ingo Molnar42202dd2009-06-13 14:57:28 +0200448}
449
450/*
451 * Print out the results of a single counter:
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200452 * aggregated counts in system-wide mode
Ingo Molnar42202dd2009-06-13 14:57:28 +0200453 */
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200454static void print_counter_aggr(struct perf_evsel *counter)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200455{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200456 struct perf_stat *ps = counter->priv;
457 double avg = avg_stats(&ps->res_stats[0]);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200458 int scaled = counter->counts->scaled;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200459
Ingo Molnar42202dd2009-06-13 14:57:28 +0200460 if (scaled == -1) {
Stephane Eraniand7470b62010-12-01 18:49:05 +0200461 fprintf(stderr, "%*s%s%-24s\n",
462 csv_output ? 0 : 18,
463 "<not counted>", csv_sep, event_name(counter));
Ingo Molnar42202dd2009-06-13 14:57:28 +0200464 return;
465 }
466
467 if (nsec_counter(counter))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200468 nsec_printout(-1, counter, avg);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200469 else
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200470 abs_printout(-1, counter, avg);
Peter Zijlstra849abde2009-09-04 18:23:38 +0200471
Stephane Eraniand7470b62010-12-01 18:49:05 +0200472 if (csv_output) {
473 fputc('\n', stderr);
474 return;
475 }
476
Peter Zijlstra849abde2009-09-04 18:23:38 +0200477 print_noise(counter, avg);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200478
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200479 if (scaled) {
480 double avg_enabled, avg_running;
481
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200482 avg_enabled = avg_stats(&ps->res_stats[1]);
483 avg_running = avg_stats(&ps->res_stats[2]);
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200484
Ingo Molnar210ad392009-06-29 21:50:54 +0200485 fprintf(stderr, " (scaled from %.2f%%)",
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200486 100 * avg_running / avg_enabled);
487 }
Ingo Molnar42202dd2009-06-13 14:57:28 +0200488
489 fprintf(stderr, "\n");
490}
491
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200492/*
493 * Print out the results of a single counter:
494 * does not use aggregated count in system-wide
495 */
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200496static void print_counter(struct perf_evsel *counter)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200497{
498 u64 ena, run, val;
499 int cpu;
500
501 for (cpu = 0; cpu < nr_cpus; cpu++) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200502 val = counter->counts->cpu[cpu].val;
503 ena = counter->counts->cpu[cpu].ena;
504 run = counter->counts->cpu[cpu].run;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200505 if (run == 0 || ena == 0) {
Stephane Eraniand7470b62010-12-01 18:49:05 +0200506 fprintf(stderr, "CPU%*d%s%*s%s%-24s",
507 csv_output ? 0 : -4,
508 cpumap[cpu], csv_sep,
509 csv_output ? 0 : 18,
510 "<not counted>", csv_sep,
511 event_name(counter));
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200512
513 fprintf(stderr, "\n");
514 continue;
515 }
516
517 if (nsec_counter(counter))
518 nsec_printout(cpu, counter, val);
519 else
520 abs_printout(cpu, counter, val);
521
Stephane Eraniand7470b62010-12-01 18:49:05 +0200522 if (!csv_output) {
523 print_noise(counter, 1.0);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200524
Stephane Eraniand7470b62010-12-01 18:49:05 +0200525 if (run != ena) {
526 fprintf(stderr, " (scaled from %.2f%%)",
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200527 100.0 * run / ena);
Stephane Eraniand7470b62010-12-01 18:49:05 +0200528 }
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200529 }
530 fprintf(stderr, "\n");
531 }
532}
533
Ingo Molnar42202dd2009-06-13 14:57:28 +0200534static void print_stat(int argc, const char **argv)
535{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200536 struct perf_evsel *counter;
537 int i;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200538
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200539 fflush(stdout);
540
Stephane Eraniand7470b62010-12-01 18:49:05 +0200541 if (!csv_output) {
542 fprintf(stderr, "\n");
543 fprintf(stderr, " Performance counter stats for ");
544 if(target_pid == -1 && target_tid == -1) {
545 fprintf(stderr, "\'%s", argv[0]);
546 for (i = 1; i < argc; i++)
547 fprintf(stderr, " %s", argv[i]);
548 } else if (target_pid != -1)
549 fprintf(stderr, "process id \'%d", target_pid);
550 else
551 fprintf(stderr, "thread id \'%d", target_tid);
Ingo Molnar44db76c2009-06-03 19:36:07 +0200552
Stephane Eraniand7470b62010-12-01 18:49:05 +0200553 fprintf(stderr, "\'");
554 if (run_count > 1)
555 fprintf(stderr, " (%d runs)", run_count);
556 fprintf(stderr, ":\n\n");
557 }
Ingo Molnar2996f5d2009-05-29 09:10:54 +0200558
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200559 if (no_aggr) {
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200560 list_for_each_entry(counter, &evsel_list, node)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200561 print_counter(counter);
562 } else {
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200563 list_for_each_entry(counter, &evsel_list, node)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200564 print_counter_aggr(counter);
565 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200566
Stephane Eraniand7470b62010-12-01 18:49:05 +0200567 if (!csv_output) {
568 fprintf(stderr, "\n");
569 fprintf(stderr, " %18.9f seconds time elapsed",
570 avg_stats(&walltime_nsecs_stats)/1e9);
571 if (run_count > 1) {
572 fprintf(stderr, " ( +- %7.3f%% )",
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200573 100*stddev_stats(&walltime_nsecs_stats) /
574 avg_stats(&walltime_nsecs_stats));
Stephane Eraniand7470b62010-12-01 18:49:05 +0200575 }
576 fprintf(stderr, "\n\n");
Ingo Molnar566747e2009-06-27 06:24:32 +0200577 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200578}
579
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200580static volatile int signr = -1;
581
Ingo Molnar52425192009-05-26 09:17:18 +0200582static void skip_signal(int signo)
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200583{
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300584 if(child_pid == -1)
Liming Wang60666c62009-12-31 16:05:50 +0800585 done = 1;
586
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200587 signr = signo;
588}
589
590static void sig_atexit(void)
591{
Chris Wilson933da832009-10-04 01:35:01 +0100592 if (child_pid != -1)
593 kill(child_pid, SIGTERM);
594
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200595 if (signr == -1)
596 return;
597
598 signal(signr, SIG_DFL);
599 kill(getpid(), signr);
Ingo Molnar52425192009-05-26 09:17:18 +0200600}
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200601
Ingo Molnar52425192009-05-26 09:17:18 +0200602static const char * const stat_usage[] = {
Liming Wang60666c62009-12-31 16:05:50 +0800603 "perf stat [<options>] [<command>]",
Ingo Molnar52425192009-05-26 09:17:18 +0200604 NULL
605};
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200606
Stephane Eraniand7470b62010-12-01 18:49:05 +0200607static int stat__set_big_num(const struct option *opt __used,
608 const char *s __used, int unset)
609{
610 big_num_opt = unset ? 0 : 1;
611 return 0;
612}
613
Ingo Molnar52425192009-05-26 09:17:18 +0200614static const struct option options[] = {
615 OPT_CALLBACK('e', "event", NULL, "event",
Thomas Gleixner86847b62009-06-06 12:24:17 +0200616 "event selector. use 'perf list' to list available events",
617 parse_events),
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200618 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
619 "child tasks do not inherit counters"),
Ingo Molnar52425192009-05-26 09:17:18 +0200620 OPT_INTEGER('p', "pid", &target_pid,
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300621 "stat events on existing process id"),
622 OPT_INTEGER('t', "tid", &target_tid,
623 "stat events on existing thread id"),
Ingo Molnar52425192009-05-26 09:17:18 +0200624 OPT_BOOLEAN('a', "all-cpus", &system_wide,
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530625 "system-wide collection from all CPUs"),
Brice Goglinb26bc5a2009-08-07 10:18:39 +0200626 OPT_BOOLEAN('c', "scale", &scale,
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530627 "scale/normalize counters"),
Ian Munsiec0555642010-04-13 18:37:33 +1000628 OPT_INCR('v', "verbose", &verbose,
Ingo Molnar743ee1f2009-06-07 17:06:46 +0200629 "be more verbose (show counter open errors, etc)"),
Ingo Molnar42202dd2009-06-13 14:57:28 +0200630 OPT_INTEGER('r', "repeat", &run_count,
631 "repeat command and print average + stddev (max: 100)"),
Ingo Molnar0cfb7a12009-06-27 06:10:30 +0200632 OPT_BOOLEAN('n', "null", &null_run,
633 "null run - dont start any counters"),
Stephane Eraniand7470b62010-12-01 18:49:05 +0200634 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
635 "print large numbers with thousands\' separators",
636 stat__set_big_num),
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200637 OPT_STRING('C', "cpu", &cpu_list, "cpu",
638 "list of cpus to monitor in system-wide"),
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200639 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
640 "disable CPU count aggregation"),
Stephane Eraniand7470b62010-12-01 18:49:05 +0200641 OPT_STRING('x', "field-separator", &csv_sep, "separator",
642 "print counts with custom separator"),
Ingo Molnar52425192009-05-26 09:17:18 +0200643 OPT_END()
644};
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200645
Ingo Molnarf37a2912009-07-01 12:37:06 +0200646int cmd_stat(int argc, const char **argv, const char *prefix __used)
Ingo Molnar52425192009-05-26 09:17:18 +0200647{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200648 struct perf_evsel *pos;
649 int status = -ENOMEM;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200650
Stephane Eranian5af52b52010-05-18 15:00:01 +0200651 setlocale(LC_ALL, "");
652
Anton Blancharda0541232009-07-22 23:04:12 +1000653 argc = parse_options(argc, argv, options, stat_usage,
654 PARSE_OPT_STOP_AT_NON_OPTION);
Stephane Eraniand7470b62010-12-01 18:49:05 +0200655
656 if (csv_sep)
657 csv_output = true;
658 else
659 csv_sep = DEFAULT_SEPARATOR;
660
661 /*
662 * let the spreadsheet do the pretty-printing
663 */
664 if (csv_output) {
665 /* User explicitely passed -B? */
666 if (big_num_opt == 1) {
667 fprintf(stderr, "-B option not supported with -x\n");
668 usage_with_options(stat_usage, options);
669 } else /* Nope, so disable big number formatting */
670 big_num = false;
671 } else if (big_num_opt == 0) /* User passed --no-big-num */
672 big_num = false;
673
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300674 if (!argc && target_pid == -1 && target_tid == -1)
Ingo Molnar52425192009-05-26 09:17:18 +0200675 usage_with_options(stat_usage, options);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200676 if (run_count <= 0)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200677 usage_with_options(stat_usage, options);
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200678
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200679 /* no_aggr is for system-wide only */
680 if (no_aggr && !system_wide)
681 usage_with_options(stat_usage, options);
682
Jaswinder Singh Rajputc3043562009-06-27 23:49:09 +0530683 /* Set attrs and nr_counters if no event is selected and !null_run */
684 if (!null_run && !nr_counters) {
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200685 size_t c;
686
Jaswinder Singh Rajputc3043562009-06-27 23:49:09 +0530687 nr_counters = ARRAY_SIZE(default_attrs);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200688
689 for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
690 pos = perf_evsel__new(default_attrs[c].type,
691 default_attrs[c].config,
692 nr_counters);
693 if (pos == NULL)
694 goto out;
695 list_add(&pos->node, &evsel_list);
696 }
Jaswinder Singh Rajputc3043562009-06-27 23:49:09 +0530697 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200698
Paul Mackerrasa12b51c2010-03-10 20:36:09 +1100699 if (system_wide)
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200700 nr_cpus = read_cpu_map(cpu_list);
Paul Mackerrasa12b51c2010-03-10 20:36:09 +1100701 else
702 nr_cpus = 1;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200703
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200704 if (nr_cpus < 1)
705 usage_with_options(stat_usage, options);
706
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300707 if (target_pid != -1) {
708 target_tid = target_pid;
709 thread_num = find_all_tid(target_pid, &all_tids);
710 if (thread_num <= 0) {
711 fprintf(stderr, "Can't find all threads of pid %d\n",
712 target_pid);
713 usage_with_options(stat_usage, options);
714 }
715 } else {
716 all_tids=malloc(sizeof(pid_t));
717 if (!all_tids)
718 return -ENOMEM;
719
720 all_tids[0] = target_tid;
721 thread_num = 1;
722 }
723
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200724 list_for_each_entry(pos, &evsel_list, node) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200725 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
726 perf_evsel__alloc_counts(pos, nr_cpus) < 0 ||
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200727 perf_evsel__alloc_fd(pos, nr_cpus, thread_num) < 0)
728 goto out_free_fd;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300729 }
730
Ingo Molnar58d7e992009-05-15 11:03:23 +0200731 /*
732 * We dont want to block the signals - that would cause
733 * child tasks to inherit that and Ctrl-C would not work.
734 * What we want is for Ctrl-C to work in the exec()-ed
735 * task, but being ignored by perf stat itself:
736 */
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200737 atexit(sig_atexit);
Ingo Molnar58d7e992009-05-15 11:03:23 +0200738 signal(SIGINT, skip_signal);
739 signal(SIGALRM, skip_signal);
740 signal(SIGABRT, skip_signal);
741
Ingo Molnar42202dd2009-06-13 14:57:28 +0200742 status = 0;
743 for (run_idx = 0; run_idx < run_count; run_idx++) {
744 if (run_count != 1 && verbose)
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530745 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200746 status = run_perf_stat(argc, argv);
747 }
748
Arnaldo Carvalho de Melo084ab9f2010-03-22 13:10:28 -0300749 if (status != -1)
750 print_stat(argc, argv);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200751out_free_fd:
Arnaldo Carvalho de Melo70d544d2011-01-03 16:51:39 -0200752 list_for_each_entry(pos, &evsel_list, node)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200753 perf_evsel__free_stat_priv(pos);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200754out:
Ingo Molnar42202dd2009-06-13 14:57:28 +0200755 return status;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200756}