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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 Melo361c99a2011-01-11 20:56:53 -020046#include "util/evlist.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020047#include "util/evsel.h"
Frederic Weisbecker8f28827a2009-08-16 22:05:48 +020048#include "util/debug.h"
Ingo Molnara5d243d2011-04-27 05:39:24 +020049#include "util/color.h"
Liming Wang60666c62009-12-31 16:05:50 +080050#include "util/header.h"
Paul Mackerrasa12b51c2010-03-10 20:36:09 +110051#include "util/cpumap.h"
Zhang, Yanmind6d901c2010-03-18 11:36:05 -030052#include "util/thread.h"
Arnaldo Carvalho de Melofd782602011-01-18 15:15:24 -020053#include "util/thread_map.h"
Ingo Molnarddcacfa2009-04-20 15:37:32 +020054
Ingo Molnarddcacfa2009-04-20 15:37:32 +020055#include <sys/prctl.h>
Ingo Molnar42202dd2009-06-13 14:57:28 +020056#include <math.h>
Stephane Eranian5af52b52010-05-18 15:00:01 +020057#include <locale.h>
Peter Zijlstra16c8a102009-05-05 17:50:27 +020058
Stephane Eraniand7470b62010-12-01 18:49:05 +020059#define DEFAULT_SEPARATOR " "
60
Ingo Molnarcdd6c482009-09-21 12:02:48 +020061static struct perf_event_attr default_attrs[] = {
Ingo Molnara21ca2c2009-06-06 09:58:57 +020062
Ingo Molnar56aab462009-10-19 13:27:08 +020063 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
64 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
65 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
66 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
Ingo Molnara21ca2c2009-06-06 09:58:57 +020067
Ingo Molnar56aab462009-10-19 13:27:08 +020068 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
Ingo Molnar1fc570a2011-04-27 05:20:22 +020069 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES },
Ingo Molnar56aab462009-10-19 13:27:08 +020070 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
Ingo Molnar56aab462009-10-19 13:27:08 +020071 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
72 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
Peter Zijlstraf4dbfa82009-06-11 14:06:28 +020073
Ingo Molnara21ca2c2009-06-06 09:58:57 +020074};
75
Ingo Molnarc6264de2011-04-27 13:50:47 +020076/*
77 * Detailed stats:
78 */
79static struct perf_event_attr detailed_attrs[] = {
80
81 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
82 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
83 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
84 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
85
86 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
87 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES },
88 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
89 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
90 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
91
92 { .type = PERF_TYPE_HW_CACHE,
93 .config =
94 PERF_COUNT_HW_CACHE_L1D << 0 |
95 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
96 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
97
98 { .type = PERF_TYPE_HW_CACHE,
99 .config =
100 PERF_COUNT_HW_CACHE_L1D << 0 |
101 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
102 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
103
104 { .type = PERF_TYPE_HW_CACHE,
105 .config =
106 PERF_COUNT_HW_CACHE_LL << 0 |
107 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
108 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
109
110 { .type = PERF_TYPE_HW_CACHE,
111 .config =
112 PERF_COUNT_HW_CACHE_LL << 0 |
113 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
114 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
115};
116
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200117struct perf_evlist *evsel_list;
118
Ian Munsiec0555642010-04-13 18:37:33 +1000119static bool system_wide = false;
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530120static int run_idx = 0;
121
122static int run_count = 1;
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200123static bool no_inherit = false;
Ian Munsiec0555642010-04-13 18:37:33 +1000124static bool scale = true;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200125static bool no_aggr = false;
Chris Wilson933da832009-10-04 01:35:01 +0100126static pid_t target_pid = -1;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300127static pid_t target_tid = -1;
Chris Wilson933da832009-10-04 01:35:01 +0100128static pid_t child_pid = -1;
Ian Munsiec0555642010-04-13 18:37:33 +1000129static bool null_run = false;
Ingo Molnarc6264de2011-04-27 13:50:47 +0200130static bool detailed_run = false;
Arnaldo Carvalho de Melo201e0b02010-12-01 17:53:27 -0200131static bool big_num = true;
Stephane Eraniand7470b62010-12-01 18:49:05 +0200132static int big_num_opt = -1;
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200133static const char *cpu_list;
Stephane Eraniand7470b62010-12-01 18:49:05 +0200134static const char *csv_sep = NULL;
135static bool csv_output = false;
Stephane Eranian5af52b52010-05-18 15:00:01 +0200136
Liming Wang60666c62009-12-31 16:05:50 +0800137static volatile int done = 0;
138
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200139struct stats
140{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200141 double n, mean, M2;
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200142};
Ingo Molnar42202dd2009-06-13 14:57:28 +0200143
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200144struct perf_stat {
145 struct stats res_stats[3];
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200146};
147
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200148static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200149{
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200150 evsel->priv = zalloc(sizeof(struct perf_stat));
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200151 return evsel->priv == NULL ? -ENOMEM : 0;
152}
153
154static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
155{
156 free(evsel->priv);
157 evsel->priv = NULL;
158}
159
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200160static void update_stats(struct stats *stats, u64 val)
161{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200162 double delta;
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200163
Peter Zijlstra8a026312009-09-04 17:26:26 +0200164 stats->n++;
165 delta = val - stats->mean;
166 stats->mean += delta / stats->n;
167 stats->M2 += delta*(val - stats->mean);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200168}
169
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200170static double avg_stats(struct stats *stats)
171{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200172 return stats->mean;
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200173}
Ingo Molnar42202dd2009-06-13 14:57:28 +0200174
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200175/*
Peter Zijlstra63d40de2009-09-04 17:03:13 +0200176 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
177 *
Peter Zijlstra8a026312009-09-04 17:26:26 +0200178 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
179 * s^2 = -------------------------------
180 * n - 1
Peter Zijlstra63d40de2009-09-04 17:03:13 +0200181 *
182 * http://en.wikipedia.org/wiki/Stddev
183 *
184 * The std dev of the mean is related to the std dev by:
185 *
186 * s
187 * s_mean = -------
188 * sqrt(n)
189 *
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200190 */
191static double stddev_stats(struct stats *stats)
192{
Peter Zijlstra8a026312009-09-04 17:26:26 +0200193 double variance = stats->M2 / (stats->n - 1);
194 double variance_mean = variance / stats->n;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200195
Peter Zijlstra63d40de2009-09-04 17:03:13 +0200196 return sqrt(variance_mean);
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200197}
Ingo Molnar42202dd2009-06-13 14:57:28 +0200198
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200199struct stats runtime_nsecs_stats[MAX_NR_CPUS];
200struct stats runtime_cycles_stats[MAX_NR_CPUS];
Ingo Molnar481f9882011-04-27 04:34:16 +0200201struct stats runtime_stalled_cycles_stats[MAX_NR_CPUS];
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200202struct stats runtime_branches_stats[MAX_NR_CPUS];
Ingo Molnard58f4c82011-04-27 03:42:18 +0200203struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
Ingo Molnar8bb6c792011-04-27 13:25:24 +0200204struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200205struct stats walltime_nsecs_stats;
Ingo Molnarbe1ac0d2009-05-29 09:10:54 +0200206
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200207static int create_perf_stat_counter(struct perf_evsel *evsel)
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200208{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200209 struct perf_event_attr *attr = &evsel->attr;
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200210
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200211 if (scale)
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200212 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
213 PERF_FORMAT_TOTAL_TIME_RUNNING;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200214
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200215 attr->inherit = !no_inherit;
Arnaldo Carvalho de Melo5d2cd902011-04-14 11:20:14 -0300216
217 if (system_wide)
218 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false);
219
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200220 if (target_pid == -1 && target_tid == -1) {
221 attr->disabled = 1;
222 attr->enable_on_exec = 1;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200223 }
Arnaldo Carvalho de Melo084ab9f2010-03-22 13:10:28 -0300224
Arnaldo Carvalho de Melo5d2cd902011-04-14 11:20:14 -0300225 return perf_evsel__open_per_thread(evsel, evsel_list->threads, false);
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200226}
227
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200228/*
229 * Does the counter have nsecs as a unit?
230 */
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200231static inline int nsec_counter(struct perf_evsel *evsel)
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200232{
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200233 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
234 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200235 return 1;
236
237 return 0;
238}
239
240/*
Ingo Molnardcd99362011-04-27 04:36:37 +0200241 * Update various tracking values we maintain to print
242 * more semantic information such as miss/hit ratios,
243 * instruction rates, etc:
244 */
245static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
246{
247 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
248 update_stats(&runtime_nsecs_stats[0], count[0]);
249 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
250 update_stats(&runtime_cycles_stats[0], count[0]);
Ingo Molnar481f9882011-04-27 04:34:16 +0200251 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES))
252 update_stats(&runtime_stalled_cycles_stats[0], count[0]);
Ingo Molnardcd99362011-04-27 04:36:37 +0200253 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
254 update_stats(&runtime_branches_stats[0], count[0]);
255 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
256 update_stats(&runtime_cacherefs_stats[0], count[0]);
Ingo Molnar8bb6c792011-04-27 13:25:24 +0200257 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
258 update_stats(&runtime_l1_dcache_stats[0], count[0]);
Ingo Molnardcd99362011-04-27 04:36:37 +0200259}
260
261/*
Ingo Molnar2996f5d2009-05-29 09:10:54 +0200262 * Read out the results of a single counter:
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200263 * aggregate counts across CPUs in system-wide mode
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200264 */
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200265static int read_counter_aggr(struct perf_evsel *counter)
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200266{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200267 struct perf_stat *ps = counter->priv;
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200268 u64 *count = counter->counts->aggr.values;
269 int i;
Ingo Molnarc04f5e52009-05-29 09:10:54 +0200270
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200271 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
272 evsel_list->threads->nr, scale) < 0)
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200273 return -1;
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200274
275 for (i = 0; i < 3; i++)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200276 update_stats(&ps->res_stats[i], count[i]);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200277
278 if (verbose) {
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200279 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
280 event_name(counter), count[0], count[1], count[2]);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200281 }
282
Ingo Molnarbe1ac0d2009-05-29 09:10:54 +0200283 /*
284 * Save the full runtime - to allow normalization during printout:
285 */
Ingo Molnardcd99362011-04-27 04:36:37 +0200286 update_shadow_stats(counter, count);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200287
288 return 0;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200289}
290
291/*
292 * Read out the results of a single counter:
293 * do not aggregate counts across CPUs in system-wide mode
294 */
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200295static int read_counter(struct perf_evsel *counter)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200296{
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200297 u64 *count;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200298 int cpu;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200299
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200300 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200301 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
302 return -1;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200303
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200304 count = counter->counts->cpu[cpu].values;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200305
Ingo Molnardcd99362011-04-27 04:36:37 +0200306 update_shadow_stats(counter, count);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200307 }
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200308
309 return 0;
Ingo Molnar2996f5d2009-05-29 09:10:54 +0200310}
311
Ingo Molnarf37a2912009-07-01 12:37:06 +0200312static int run_perf_stat(int argc __used, const char **argv)
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200313{
314 unsigned long long t0, t1;
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200315 struct perf_evsel *counter;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200316 int status = 0;
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000317 int child_ready_pipe[2], go_pipe[2];
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300318 const bool forks = (argc > 0);
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000319 char buf;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200320
Liming Wang60666c62009-12-31 16:05:50 +0800321 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000322 perror("failed to create pipes");
323 exit(1);
324 }
325
Liming Wang60666c62009-12-31 16:05:50 +0800326 if (forks) {
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300327 if ((child_pid = fork()) < 0)
Liming Wang60666c62009-12-31 16:05:50 +0800328 perror("failed to fork");
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000329
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300330 if (!child_pid) {
Liming Wang60666c62009-12-31 16:05:50 +0800331 close(child_ready_pipe[0]);
332 close(go_pipe[1]);
333 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
334
335 /*
336 * Do a dummy execvp to get the PLT entry resolved,
337 * so we avoid the resolver overhead on the real
338 * execvp call.
339 */
340 execvp("", (char **)argv);
341
342 /*
343 * Tell the parent we're ready to go
344 */
345 close(child_ready_pipe[1]);
346
347 /*
348 * Wait until the parent tells us to go.
349 */
350 if (read(go_pipe[0], &buf, 1) == -1)
351 perror("unable to read pipe");
352
353 execvp(argv[0], (char **)argv);
354
355 perror(argv[0]);
356 exit(-1);
357 }
358
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300359 if (target_tid == -1 && target_pid == -1 && !system_wide)
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200360 evsel_list->threads->map[0] = child_pid;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300361
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000362 /*
Liming Wang60666c62009-12-31 16:05:50 +0800363 * Wait for the child to be ready to exec.
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000364 */
365 close(child_ready_pipe[1]);
Liming Wang60666c62009-12-31 16:05:50 +0800366 close(go_pipe[0]);
367 if (read(child_ready_pipe[0], &buf, 1) == -1)
Frederic Weisbeckera92bef02009-07-01 21:02:10 +0200368 perror("unable to read pipe");
Liming Wang60666c62009-12-31 16:05:50 +0800369 close(child_ready_pipe[0]);
Paul Mackerras051ae7f2009-06-29 21:13:21 +1000370 }
371
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200372 list_for_each_entry(counter, &evsel_list->entries, node) {
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200373 if (create_perf_stat_counter(counter) < 0) {
374 if (errno == -EPERM || errno == -EACCES) {
375 error("You may not have permission to collect %sstats.\n"
376 "\t Consider tweaking"
377 " /proc/sys/kernel/perf_event_paranoid or running as root.",
378 system_wide ? "system-wide " : "");
David Ahern5a3446b2011-01-09 11:21:12 -0700379 } else if (errno == ENOENT) {
380 error("%s event is not supported. ", event_name(counter));
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -0200381 } else {
382 error("open_counter returned with %d (%s). "
383 "/bin/dmesg may provide additional information.\n",
384 errno, strerror(errno));
385 }
386 if (child_pid != -1)
387 kill(child_pid, SIGTERM);
388 die("Not all events could be opened.\n");
389 return -1;
390 }
Arnaldo Carvalho de Melo084ab9f2010-03-22 13:10:28 -0300391 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200392
Frederic Weisbeckercfd748a2011-03-14 16:40:30 +0100393 if (perf_evlist__set_filters(evsel_list)) {
394 error("failed to set filter with %d (%s)\n", errno,
395 strerror(errno));
396 return -1;
397 }
398
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200399 /*
400 * Enable counters and exec the command:
401 */
402 t0 = rdclock();
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200403
Liming Wang60666c62009-12-31 16:05:50 +0800404 if (forks) {
405 close(go_pipe[1]);
406 wait(&status);
407 } else {
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300408 while(!done) sleep(1);
Liming Wang60666c62009-12-31 16:05:50 +0800409 }
Ingo Molnar44db76c2009-06-03 19:36:07 +0200410
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200411 t1 = rdclock();
412
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200413 update_stats(&walltime_nsecs_stats, t1 - t0);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200414
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200415 if (no_aggr) {
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200416 list_for_each_entry(counter, &evsel_list->entries, node) {
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200417 read_counter(counter);
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200418 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200419 }
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200420 } else {
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200421 list_for_each_entry(counter, &evsel_list->entries, node) {
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200422 read_counter_aggr(counter);
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200423 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
424 evsel_list->threads->nr);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200425 }
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200426 }
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200427
Ingo Molnar42202dd2009-06-13 14:57:28 +0200428 return WEXITSTATUS(status);
429}
430
Ingo Molnarf99844c2011-04-27 05:35:39 +0200431static void print_noise_pct(double total, double avg)
432{
433 double pct = 0.0;
434
435 if (avg)
436 pct = 100.0*total/avg;
437
438 fprintf(stderr, " ( +-%6.2f%% )", pct);
439}
440
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200441static void print_noise(struct perf_evsel *evsel, double avg)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200442{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200443 struct perf_stat *ps;
444
Peter Zijlstra849abde2009-09-04 18:23:38 +0200445 if (run_count == 1)
446 return;
447
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200448 ps = evsel->priv;
Ingo Molnarf99844c2011-04-27 05:35:39 +0200449 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200450}
451
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200452static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200453{
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200454 double msecs = avg / 1e6;
Stephane Eraniand7470b62010-12-01 18:49:05 +0200455 char cpustr[16] = { '\0', };
456 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
Ingo Molnar42202dd2009-06-13 14:57:28 +0200457
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200458 if (no_aggr)
Stephane Eraniand7470b62010-12-01 18:49:05 +0200459 sprintf(cpustr, "CPU%*d%s",
460 csv_output ? 0 : -4,
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200461 evsel_list->cpus->map[cpu], csv_sep);
Stephane Eraniand7470b62010-12-01 18:49:05 +0200462
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200463 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
Stephane Eraniand7470b62010-12-01 18:49:05 +0200464
Stephane Eranian023695d2011-02-14 11:20:01 +0200465 if (evsel->cgrp)
466 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
467
Stephane Eraniand7470b62010-12-01 18:49:05 +0200468 if (csv_output)
469 return;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200470
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200471 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
Ingo Molnar481f9882011-04-27 04:34:16 +0200472 fprintf(stderr, " # %8.3f CPUs utilized ", avg / avg_stats(&walltime_nsecs_stats));
Ingo Molnar42202dd2009-06-13 14:57:28 +0200473}
474
Ingo Molnara5d243d2011-04-27 05:39:24 +0200475static void print_stalled_cycles(int cpu, struct perf_evsel *evsel __used, double avg)
476{
477 double total, ratio = 0.0;
478 const char *color;
479
480 total = avg_stats(&runtime_cycles_stats[cpu]);
481
482 if (total)
483 ratio = avg / total * 100.0;
484
485 color = PERF_COLOR_NORMAL;
486 if (ratio > 75.0)
487 color = PERF_COLOR_RED;
488 else if (ratio > 50.0)
489 color = PERF_COLOR_MAGENTA;
490 else if (ratio > 25.0)
491 color = PERF_COLOR_YELLOW;
492
493 fprintf(stderr, " # ");
494 color_fprintf(stderr, color, "%5.2f%%", ratio);
495 fprintf(stderr, " of all cycles are idle ");
496}
497
Ingo Molnarc78df6c2011-04-27 12:16:10 +0200498static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
499{
500 double total, ratio = 0.0;
501 const char *color;
502
503 total = avg_stats(&runtime_branches_stats[cpu]);
504
505 if (total)
506 ratio = avg / total * 100.0;
507
508 color = PERF_COLOR_NORMAL;
509 if (ratio > 20.0)
510 color = PERF_COLOR_RED;
511 else if (ratio > 10.0)
512 color = PERF_COLOR_MAGENTA;
513 else if (ratio > 5.0)
514 color = PERF_COLOR_YELLOW;
515
516 fprintf(stderr, " # ");
517 color_fprintf(stderr, color, "%5.2f%%", ratio);
518 fprintf(stderr, " of all branches ");
519}
520
Ingo Molnar8bb6c792011-04-27 13:25:24 +0200521static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
522{
523 double total, ratio = 0.0;
524 const char *color;
525
526 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
527
528 if (total)
529 ratio = avg / total * 100.0;
530
531 color = PERF_COLOR_NORMAL;
532 if (ratio > 20.0)
533 color = PERF_COLOR_RED;
534 else if (ratio > 10.0)
535 color = PERF_COLOR_MAGENTA;
536 else if (ratio > 5.0)
537 color = PERF_COLOR_YELLOW;
538
539 fprintf(stderr, " # ");
540 color_fprintf(stderr, color, "%5.2f%%", ratio);
541 fprintf(stderr, " of all L1-dcache hits ");
542}
543
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200544static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200545{
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200546 double total, ratio = 0.0;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200547 char cpustr[16] = { '\0', };
Stephane Eraniand7470b62010-12-01 18:49:05 +0200548 const char *fmt;
549
550 if (csv_output)
551 fmt = "%s%.0f%s%s";
552 else if (big_num)
553 fmt = "%s%'18.0f%s%-24s";
554 else
555 fmt = "%s%18.0f%s%-24s";
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200556
557 if (no_aggr)
Stephane Eraniand7470b62010-12-01 18:49:05 +0200558 sprintf(cpustr, "CPU%*d%s",
559 csv_output ? 0 : -4,
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200560 evsel_list->cpus->map[cpu], csv_sep);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200561 else
562 cpu = 0;
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200563
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200564 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
Stephane Eraniand7470b62010-12-01 18:49:05 +0200565
Stephane Eranian023695d2011-02-14 11:20:01 +0200566 if (evsel->cgrp)
567 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
568
Stephane Eraniand7470b62010-12-01 18:49:05 +0200569 if (csv_output)
570 return;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200571
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200572 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200573 total = avg_stats(&runtime_cycles_stats[cpu]);
Ingo Molnarc7f7fea2009-09-22 14:53:51 +0200574
575 if (total)
576 ratio = avg / total;
577
Ingo Molnar481f9882011-04-27 04:34:16 +0200578 fprintf(stderr, " # %4.2f insns per cycle", ratio);
579
580 total = avg_stats(&runtime_stalled_cycles_stats[cpu]);
581
582 if (total && avg) {
583 ratio = total / avg;
584 fprintf(stderr, "\n # %4.2f stalled cycles per insn", ratio);
585 }
586
Arnaldo Carvalho de Melodaec78a2011-01-03 16:49:44 -0200587 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200588 runtime_branches_stats[cpu].n != 0) {
Ingo Molnarc78df6c2011-04-27 12:16:10 +0200589 print_branch_misses(cpu, evsel, avg);
Ingo Molnar8bb6c792011-04-27 13:25:24 +0200590 } else if (
591 evsel->attr.type == PERF_TYPE_HW_CACHE &&
592 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
593 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
594 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
Ingo Molnarc6264de2011-04-27 13:50:47 +0200595 runtime_l1_dcache_stats[cpu].n != 0) {
Ingo Molnar8bb6c792011-04-27 13:25:24 +0200596 print_l1_dcache_misses(cpu, evsel, avg);
Ingo Molnard58f4c82011-04-27 03:42:18 +0200597 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
598 runtime_cacherefs_stats[cpu].n != 0) {
599 total = avg_stats(&runtime_cacherefs_stats[cpu]);
600
601 if (total)
602 ratio = avg * 100 / total;
603
Ingo Molnar481f9882011-04-27 04:34:16 +0200604 fprintf(stderr, " # %8.3f %% of all cache refs ", ratio);
Ingo Molnard58f4c82011-04-27 03:42:18 +0200605
Ingo Molnar11ba2b82011-04-24 15:05:10 +0200606 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES)) {
Ingo Molnara5d243d2011-04-27 05:39:24 +0200607 print_stalled_cycles(cpu, evsel, avg);
Ingo Molnar481f9882011-04-27 04:34:16 +0200608 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
609 total = avg_stats(&runtime_nsecs_stats[cpu]);
610
611 if (total)
612 ratio = 1.0 * avg / total;
613
614 fprintf(stderr, " # %8.3f GHz ", ratio);
615 } else if (runtime_nsecs_stats[cpu].n != 0) {
616 total = avg_stats(&runtime_nsecs_stats[cpu]);
617
618 if (total)
619 ratio = 1000.0 * avg / total;
620
621 fprintf(stderr, " # %8.3f M/sec ", ratio);
Ingo Molnara5d243d2011-04-27 05:39:24 +0200622 } else {
623 fprintf(stderr, " ");
Ingo Molnar42202dd2009-06-13 14:57:28 +0200624 }
Ingo Molnar42202dd2009-06-13 14:57:28 +0200625}
626
627/*
628 * Print out the results of a single counter:
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200629 * aggregated counts in system-wide mode
Ingo Molnar42202dd2009-06-13 14:57:28 +0200630 */
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200631static void print_counter_aggr(struct perf_evsel *counter)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200632{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200633 struct perf_stat *ps = counter->priv;
634 double avg = avg_stats(&ps->res_stats[0]);
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200635 int scaled = counter->counts->scaled;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200636
Ingo Molnar42202dd2009-06-13 14:57:28 +0200637 if (scaled == -1) {
Stephane Eranian023695d2011-02-14 11:20:01 +0200638 fprintf(stderr, "%*s%s%*s",
Stephane Eraniand7470b62010-12-01 18:49:05 +0200639 csv_output ? 0 : 18,
Stephane Eranian023695d2011-02-14 11:20:01 +0200640 "<not counted>",
641 csv_sep,
642 csv_output ? 0 : -24,
643 event_name(counter));
644
645 if (counter->cgrp)
646 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
647
648 fputc('\n', stderr);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200649 return;
650 }
651
652 if (nsec_counter(counter))
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200653 nsec_printout(-1, counter, avg);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200654 else
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200655 abs_printout(-1, counter, avg);
Peter Zijlstra849abde2009-09-04 18:23:38 +0200656
Stephane Eraniand7470b62010-12-01 18:49:05 +0200657 if (csv_output) {
658 fputc('\n', stderr);
659 return;
660 }
661
Peter Zijlstra849abde2009-09-04 18:23:38 +0200662 print_noise(counter, avg);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200663
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200664 if (scaled) {
665 double avg_enabled, avg_running;
666
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200667 avg_enabled = avg_stats(&ps->res_stats[1]);
668 avg_running = avg_stats(&ps->res_stats[2]);
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200669
Ingo Molnarc6264de2011-04-27 13:50:47 +0200670 fprintf(stderr, " (%.2f%%)", 100 * avg_running / avg_enabled);
Peter Zijlstra506d4bc2009-09-04 15:36:12 +0200671 }
Ingo Molnar42202dd2009-06-13 14:57:28 +0200672 fprintf(stderr, "\n");
673}
674
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200675/*
676 * Print out the results of a single counter:
677 * does not use aggregated count in system-wide
678 */
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200679static void print_counter(struct perf_evsel *counter)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200680{
681 u64 ena, run, val;
682 int cpu;
683
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200684 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200685 val = counter->counts->cpu[cpu].val;
686 ena = counter->counts->cpu[cpu].ena;
687 run = counter->counts->cpu[cpu].run;
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200688 if (run == 0 || ena == 0) {
Stephane Eranian023695d2011-02-14 11:20:01 +0200689 fprintf(stderr, "CPU%*d%s%*s%s%*s",
Stephane Eraniand7470b62010-12-01 18:49:05 +0200690 csv_output ? 0 : -4,
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200691 evsel_list->cpus->map[cpu], csv_sep,
Stephane Eraniand7470b62010-12-01 18:49:05 +0200692 csv_output ? 0 : 18,
693 "<not counted>", csv_sep,
Stephane Eranian023695d2011-02-14 11:20:01 +0200694 csv_output ? 0 : -24,
Stephane Eraniand7470b62010-12-01 18:49:05 +0200695 event_name(counter));
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200696
Stephane Eranian023695d2011-02-14 11:20:01 +0200697 if (counter->cgrp)
698 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
699
700 fputc('\n', stderr);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200701 continue;
702 }
703
704 if (nsec_counter(counter))
705 nsec_printout(cpu, counter, val);
706 else
707 abs_printout(cpu, counter, val);
708
Stephane Eraniand7470b62010-12-01 18:49:05 +0200709 if (!csv_output) {
710 print_noise(counter, 1.0);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200711
Ingo Molnarc6264de2011-04-27 13:50:47 +0200712 if (run != ena)
713 fprintf(stderr, " (%.2f%%)", 100.0 * run / ena);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200714 }
Stephane Eranian023695d2011-02-14 11:20:01 +0200715 fputc('\n', stderr);
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200716 }
717}
718
Ingo Molnar42202dd2009-06-13 14:57:28 +0200719static void print_stat(int argc, const char **argv)
720{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200721 struct perf_evsel *counter;
722 int i;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200723
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200724 fflush(stdout);
725
Stephane Eraniand7470b62010-12-01 18:49:05 +0200726 if (!csv_output) {
727 fprintf(stderr, "\n");
728 fprintf(stderr, " Performance counter stats for ");
729 if(target_pid == -1 && target_tid == -1) {
730 fprintf(stderr, "\'%s", argv[0]);
731 for (i = 1; i < argc; i++)
732 fprintf(stderr, " %s", argv[i]);
733 } else if (target_pid != -1)
734 fprintf(stderr, "process id \'%d", target_pid);
735 else
736 fprintf(stderr, "thread id \'%d", target_tid);
Ingo Molnar44db76c2009-06-03 19:36:07 +0200737
Stephane Eraniand7470b62010-12-01 18:49:05 +0200738 fprintf(stderr, "\'");
739 if (run_count > 1)
740 fprintf(stderr, " (%d runs)", run_count);
741 fprintf(stderr, ":\n\n");
742 }
Ingo Molnar2996f5d2009-05-29 09:10:54 +0200743
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200744 if (no_aggr) {
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200745 list_for_each_entry(counter, &evsel_list->entries, node)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200746 print_counter(counter);
747 } else {
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200748 list_for_each_entry(counter, &evsel_list->entries, node)
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200749 print_counter_aggr(counter);
750 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200751
Stephane Eraniand7470b62010-12-01 18:49:05 +0200752 if (!csv_output) {
753 fprintf(stderr, "\n");
754 fprintf(stderr, " %18.9f seconds time elapsed",
755 avg_stats(&walltime_nsecs_stats)/1e9);
756 if (run_count > 1) {
Ingo Molnarf99844c2011-04-27 05:35:39 +0200757 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
758 avg_stats(&walltime_nsecs_stats));
Stephane Eraniand7470b62010-12-01 18:49:05 +0200759 }
760 fprintf(stderr, "\n\n");
Ingo Molnar566747e2009-06-27 06:24:32 +0200761 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200762}
763
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200764static volatile int signr = -1;
765
Ingo Molnar52425192009-05-26 09:17:18 +0200766static void skip_signal(int signo)
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200767{
Zhang, Yanmin6be28502010-03-18 11:36:03 -0300768 if(child_pid == -1)
Liming Wang60666c62009-12-31 16:05:50 +0800769 done = 1;
770
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200771 signr = signo;
772}
773
774static void sig_atexit(void)
775{
Chris Wilson933da832009-10-04 01:35:01 +0100776 if (child_pid != -1)
777 kill(child_pid, SIGTERM);
778
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200779 if (signr == -1)
780 return;
781
782 signal(signr, SIG_DFL);
783 kill(getpid(), signr);
Ingo Molnar52425192009-05-26 09:17:18 +0200784}
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200785
Ingo Molnar52425192009-05-26 09:17:18 +0200786static const char * const stat_usage[] = {
Liming Wang60666c62009-12-31 16:05:50 +0800787 "perf stat [<options>] [<command>]",
Ingo Molnar52425192009-05-26 09:17:18 +0200788 NULL
789};
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200790
Stephane Eraniand7470b62010-12-01 18:49:05 +0200791static int stat__set_big_num(const struct option *opt __used,
792 const char *s __used, int unset)
793{
794 big_num_opt = unset ? 0 : 1;
795 return 0;
796}
797
Ingo Molnar52425192009-05-26 09:17:18 +0200798static const struct option options[] = {
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200799 OPT_CALLBACK('e', "event", &evsel_list, "event",
Thomas Gleixner86847b62009-06-06 12:24:17 +0200800 "event selector. use 'perf list' to list available events",
801 parse_events),
Frederic Weisbeckercfd748a2011-03-14 16:40:30 +0100802 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
803 "event filter", parse_filter),
Stephane Eranian2e6cdf92010-05-12 10:40:01 +0200804 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
805 "child tasks do not inherit counters"),
Ingo Molnar52425192009-05-26 09:17:18 +0200806 OPT_INTEGER('p', "pid", &target_pid,
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300807 "stat events on existing process id"),
808 OPT_INTEGER('t', "tid", &target_tid,
809 "stat events on existing thread id"),
Ingo Molnar52425192009-05-26 09:17:18 +0200810 OPT_BOOLEAN('a', "all-cpus", &system_wide,
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530811 "system-wide collection from all CPUs"),
Brice Goglinb26bc5a2009-08-07 10:18:39 +0200812 OPT_BOOLEAN('c', "scale", &scale,
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530813 "scale/normalize counters"),
Ian Munsiec0555642010-04-13 18:37:33 +1000814 OPT_INCR('v', "verbose", &verbose,
Ingo Molnar743ee1f2009-06-07 17:06:46 +0200815 "be more verbose (show counter open errors, etc)"),
Ingo Molnar42202dd2009-06-13 14:57:28 +0200816 OPT_INTEGER('r', "repeat", &run_count,
817 "repeat command and print average + stddev (max: 100)"),
Ingo Molnar0cfb7a12009-06-27 06:10:30 +0200818 OPT_BOOLEAN('n', "null", &null_run,
819 "null run - dont start any counters"),
Ingo Molnarc6264de2011-04-27 13:50:47 +0200820 OPT_BOOLEAN('d', "detailed", &detailed_run,
821 "detailed run - start a lot of events"),
Stephane Eraniand7470b62010-12-01 18:49:05 +0200822 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
823 "print large numbers with thousands\' separators",
824 stat__set_big_num),
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200825 OPT_STRING('C', "cpu", &cpu_list, "cpu",
826 "list of cpus to monitor in system-wide"),
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200827 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
828 "disable CPU count aggregation"),
Stephane Eraniand7470b62010-12-01 18:49:05 +0200829 OPT_STRING('x', "field-separator", &csv_sep, "separator",
830 "print counts with custom separator"),
Stephane Eranian023695d2011-02-14 11:20:01 +0200831 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
832 "monitor event in cgroup name only",
833 parse_cgroups),
Ingo Molnar52425192009-05-26 09:17:18 +0200834 OPT_END()
835};
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200836
Ingo Molnarf37a2912009-07-01 12:37:06 +0200837int cmd_stat(int argc, const char **argv, const char *prefix __used)
Ingo Molnar52425192009-05-26 09:17:18 +0200838{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200839 struct perf_evsel *pos;
840 int status = -ENOMEM;
Ingo Molnar42202dd2009-06-13 14:57:28 +0200841
Stephane Eranian5af52b52010-05-18 15:00:01 +0200842 setlocale(LC_ALL, "");
843
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200844 evsel_list = perf_evlist__new(NULL, NULL);
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200845 if (evsel_list == NULL)
846 return -ENOMEM;
847
Anton Blancharda0541232009-07-22 23:04:12 +1000848 argc = parse_options(argc, argv, options, stat_usage,
849 PARSE_OPT_STOP_AT_NON_OPTION);
Stephane Eraniand7470b62010-12-01 18:49:05 +0200850
851 if (csv_sep)
852 csv_output = true;
853 else
854 csv_sep = DEFAULT_SEPARATOR;
855
856 /*
857 * let the spreadsheet do the pretty-printing
858 */
859 if (csv_output) {
860 /* User explicitely passed -B? */
861 if (big_num_opt == 1) {
862 fprintf(stderr, "-B option not supported with -x\n");
863 usage_with_options(stat_usage, options);
864 } else /* Nope, so disable big number formatting */
865 big_num = false;
866 } else if (big_num_opt == 0) /* User passed --no-big-num */
867 big_num = false;
868
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300869 if (!argc && target_pid == -1 && target_tid == -1)
Ingo Molnar52425192009-05-26 09:17:18 +0200870 usage_with_options(stat_usage, options);
Peter Zijlstra9e9772c2009-09-04 15:36:08 +0200871 if (run_count <= 0)
Ingo Molnar42202dd2009-06-13 14:57:28 +0200872 usage_with_options(stat_usage, options);
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200873
Stephane Eranian023695d2011-02-14 11:20:01 +0200874 /* no_aggr, cgroup are for system-wide only */
875 if ((no_aggr || nr_cgroups) && !system_wide) {
876 fprintf(stderr, "both cgroup and no-aggregation "
877 "modes only available in system-wide mode\n");
878
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200879 usage_with_options(stat_usage, options);
Stephane Eranian023695d2011-02-14 11:20:01 +0200880 }
Stephane Eranianf5b4a9c32010-11-16 11:05:01 +0200881
Jaswinder Singh Rajputc3043562009-06-27 23:49:09 +0530882 /* Set attrs and nr_counters if no event is selected and !null_run */
Ingo Molnarc6264de2011-04-27 13:50:47 +0200883 if (detailed_run) {
884 size_t c;
885
886 for (c = 0; c < ARRAY_SIZE(detailed_attrs); ++c) {
887 pos = perf_evsel__new(&detailed_attrs[c], c);
888 if (pos == NULL)
889 goto out;
890 perf_evlist__add(evsel_list, pos);
891 }
892 }
893 /* Set attrs and nr_counters if no event is selected and !null_run */
894 if (!detailed_run && !null_run && !evsel_list->nr_entries) {
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200895 size_t c;
896
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200897 for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200898 pos = perf_evsel__new(&default_attrs[c], c);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200899 if (pos == NULL)
900 goto out;
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200901 perf_evlist__add(evsel_list, pos);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200902 }
Jaswinder Singh Rajputc3043562009-06-27 23:49:09 +0530903 }
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200904
Arnaldo Carvalho de Melo5c98d4662011-01-03 17:53:33 -0200905 if (target_pid != -1)
906 target_tid = target_pid;
907
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200908 evsel_list->threads = thread_map__new(target_pid, target_tid);
909 if (evsel_list->threads == NULL) {
Arnaldo Carvalho de Melo5c98d4662011-01-03 17:53:33 -0200910 pr_err("Problems finding threads of monitor\n");
911 usage_with_options(stat_usage, options);
912 }
913
Paul Mackerrasa12b51c2010-03-10 20:36:09 +1100914 if (system_wide)
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200915 evsel_list->cpus = cpu_map__new(cpu_list);
Paul Mackerrasa12b51c2010-03-10 20:36:09 +1100916 else
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200917 evsel_list->cpus = cpu_map__dummy_new();
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200918
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200919 if (evsel_list->cpus == NULL) {
Arnaldo Carvalho de Melo60d567e2011-01-03 17:49:48 -0200920 perror("failed to parse CPUs map");
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200921 usage_with_options(stat_usage, options);
Arnaldo Carvalho de Melo60d567e2011-01-03 17:49:48 -0200922 return -1;
923 }
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200924
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200925 list_for_each_entry(pos, &evsel_list->entries, node) {
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200926 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200927 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
928 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200929 goto out_free_fd;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300930 }
931
Ingo Molnar58d7e992009-05-15 11:03:23 +0200932 /*
933 * We dont want to block the signals - that would cause
934 * child tasks to inherit that and Ctrl-C would not work.
935 * What we want is for Ctrl-C to work in the exec()-ed
936 * task, but being ignored by perf stat itself:
937 */
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200938 atexit(sig_atexit);
Ingo Molnar58d7e992009-05-15 11:03:23 +0200939 signal(SIGINT, skip_signal);
940 signal(SIGALRM, skip_signal);
941 signal(SIGABRT, skip_signal);
942
Ingo Molnar42202dd2009-06-13 14:57:28 +0200943 status = 0;
944 for (run_idx = 0; run_idx < run_count; run_idx++) {
945 if (run_count != 1 && verbose)
Jaswinder Singh Rajput3d632592009-06-24 18:19:34 +0530946 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200947 status = run_perf_stat(argc, argv);
948 }
949
Arnaldo Carvalho de Melo084ab9f2010-03-22 13:10:28 -0300950 if (status != -1)
951 print_stat(argc, argv);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200952out_free_fd:
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200953 list_for_each_entry(pos, &evsel_list->entries, node)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200954 perf_evsel__free_stat_priv(pos);
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200955 perf_evlist__delete_maps(evsel_list);
Arnaldo Carvalho de Melo0015e2e2011-02-01 16:18:10 -0200956out:
957 perf_evlist__delete(evsel_list);
Ingo Molnar42202dd2009-06-13 14:57:28 +0200958 return status;
Ingo Molnarddcacfa2009-04-20 15:37:32 +0200959}