Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 1 | /* |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 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: |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 8 | |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 9 | $ perf stat ~/hackbench 10 |
| 10 | Time: 0.104 |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 11 | |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 12 | Performance counter stats for '/home/mingo/hackbench': |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 13 | |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 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 |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 22 | |
Ingo Molnar | bf9e187 | 2009-06-02 23:37:05 +0200 | [diff] [blame] | 23 | Wall-clock time elapsed: 123.786620 msecs |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 24 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 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> |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 35 | * Jaswinder Singh Rajput <jaswinder@kernel.org> |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 36 | * |
| 37 | * Released under the GPL v2. (and only v2, not any later version) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 38 | */ |
| 39 | |
Peter Zijlstra | 1a482f3 | 2009-05-23 18:28:58 +0200 | [diff] [blame] | 40 | #include "perf.h" |
Ingo Molnar | 16f762a | 2009-05-27 09:10:38 +0200 | [diff] [blame] | 41 | #include "builtin.h" |
Ingo Molnar | 148be2c | 2009-04-27 08:02:14 +0200 | [diff] [blame] | 42 | #include "util/util.h" |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 43 | #include "util/parse-options.h" |
| 44 | #include "util/parse-events.h" |
Frederic Weisbecker | 8f28827 | 2009-08-16 22:05:48 +0200 | [diff] [blame] | 45 | #include "util/event.h" |
| 46 | #include "util/debug.h" |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 47 | #include "util/header.h" |
Paul Mackerras | a12b51c | 2010-03-10 20:36:09 +1100 | [diff] [blame] | 48 | #include "util/cpumap.h" |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 49 | #include "util/thread.h" |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 50 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 51 | #include <sys/prctl.h> |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 52 | #include <math.h> |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 53 | #include <locale.h> |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 54 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 55 | static struct perf_event_attr default_attrs[] = { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 56 | |
Ingo Molnar | 56aab46 | 2009-10-19 13:27:08 +0200 | [diff] [blame] | 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 }, |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 61 | |
Ingo Molnar | 56aab46 | 2009-10-19 13:27:08 +0200 | [diff] [blame] | 62 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
| 63 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, |
Ingo Molnar | 56aab46 | 2009-10-19 13:27:08 +0200 | [diff] [blame] | 64 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, |
| 65 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, |
Ingo Molnar | dd86e72 | 2009-10-19 13:33:03 +0200 | [diff] [blame] | 66 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, |
| 67 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 68 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 69 | }; |
| 70 | |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 71 | static bool system_wide = false; |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 72 | static int nr_cpus = 0; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 73 | static int run_idx = 0; |
| 74 | |
| 75 | static int run_count = 1; |
Stephane Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 76 | static bool no_inherit = false; |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 77 | static bool scale = true; |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 78 | static bool no_aggr = false; |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 79 | static pid_t target_pid = -1; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 80 | static pid_t target_tid = -1; |
| 81 | static pid_t *all_tids = NULL; |
| 82 | static int thread_num = 0; |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 83 | static pid_t child_pid = -1; |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 84 | static bool null_run = false; |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 85 | static bool big_num = false; |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 86 | static const char *cpu_list; |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 87 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 88 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 89 | static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 90 | |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 91 | static int event_scaled[MAX_COUNTERS]; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 92 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 93 | static struct { |
| 94 | u64 val; |
| 95 | u64 ena; |
| 96 | u64 run; |
| 97 | } cpu_counts[MAX_NR_CPUS][MAX_COUNTERS]; |
| 98 | |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 99 | static volatile int done = 0; |
| 100 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 101 | struct stats |
| 102 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 103 | double n, mean, M2; |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 104 | }; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 105 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 106 | static void update_stats(struct stats *stats, u64 val) |
| 107 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 108 | double delta; |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 109 | |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 110 | stats->n++; |
| 111 | delta = val - stats->mean; |
| 112 | stats->mean += delta / stats->n; |
| 113 | stats->M2 += delta*(val - stats->mean); |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 114 | } |
| 115 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 116 | static double avg_stats(struct stats *stats) |
| 117 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 118 | return stats->mean; |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 119 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 120 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 121 | /* |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 122 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance |
| 123 | * |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 124 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n |
| 125 | * s^2 = ------------------------------- |
| 126 | * n - 1 |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 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 | * |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 136 | */ |
| 137 | static double stddev_stats(struct stats *stats) |
| 138 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 139 | double variance = stats->M2 / (stats->n - 1); |
| 140 | double variance_mean = variance / stats->n; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 141 | |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 142 | return sqrt(variance_mean); |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 143 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 144 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 145 | struct stats event_res_stats[MAX_COUNTERS][3]; |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 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]; |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 149 | struct stats walltime_nsecs_stats; |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 150 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 151 | #define MATCH_EVENT(t, c, counter) \ |
| 152 | (attrs[counter].type == PERF_TYPE_##t && \ |
| 153 | attrs[counter].config == PERF_COUNT_##c) |
| 154 | |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 155 | #define ERR_PERF_OPEN \ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 156 | "Error: counter %d, sys_perf_event_open() syscall returned with %d (%s)\n" |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 157 | |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 158 | static int create_perf_stat_counter(int counter) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 159 | { |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 160 | struct perf_event_attr *attr = attrs + counter; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 161 | int thread; |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 162 | int ncreated = 0; |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 163 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 164 | if (scale) |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 165 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
| 166 | PERF_FORMAT_TOTAL_TIME_RUNNING; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 167 | |
| 168 | if (system_wide) { |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 169 | int cpu; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 170 | |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 171 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 172 | fd[cpu][counter][0] = sys_perf_event_open(attr, |
| 173 | -1, cpumap[cpu], -1, 0); |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 174 | if (fd[cpu][counter][0] < 0) |
| 175 | pr_debug(ERR_PERF_OPEN, counter, |
| 176 | fd[cpu][counter][0], strerror(errno)); |
| 177 | else |
| 178 | ++ncreated; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 179 | } |
| 180 | } else { |
Stephane Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 181 | attr->inherit = !no_inherit; |
| 182 | if (target_pid == -1 && target_tid == -1) { |
Zhang, Yanmin | 6be2850 | 2010-03-18 11:36:03 -0300 | [diff] [blame] | 183 | attr->disabled = 1; |
| 184 | attr->enable_on_exec = 1; |
| 185 | } |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 186 | for (thread = 0; thread < thread_num; thread++) { |
| 187 | fd[0][counter][thread] = sys_perf_event_open(attr, |
| 188 | all_tids[thread], -1, -1, 0); |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 189 | if (fd[0][counter][thread] < 0) |
| 190 | pr_debug(ERR_PERF_OPEN, counter, |
| 191 | fd[0][counter][thread], |
| 192 | strerror(errno)); |
| 193 | else |
| 194 | ++ncreated; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 195 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 196 | } |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 197 | |
| 198 | return ncreated; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 199 | } |
| 200 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 201 | /* |
| 202 | * Does the counter have nsecs as a unit? |
| 203 | */ |
| 204 | static inline int nsec_counter(int counter) |
| 205 | { |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 206 | if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) || |
| 207 | MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 208 | return 1; |
| 209 | |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | /* |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 214 | * Read out the results of a single counter: |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 215 | * aggregate counts across CPUs in system-wide mode |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 216 | */ |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 217 | static void read_counter_aggr(int counter) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 218 | { |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 219 | u64 count[3], single_count[3]; |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 220 | int cpu; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 221 | size_t res, nv; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 222 | int scaled; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 223 | int i, thread; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 224 | |
| 225 | count[0] = count[1] = count[2] = 0; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 226 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 227 | nv = scale ? 3 : 1; |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 228 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 229 | for (thread = 0; thread < thread_num; thread++) { |
| 230 | if (fd[cpu][counter][thread] < 0) |
| 231 | continue; |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 232 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 233 | res = read(fd[cpu][counter][thread], |
| 234 | single_count, nv * sizeof(u64)); |
| 235 | assert(res == nv * sizeof(u64)); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 236 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 237 | close(fd[cpu][counter][thread]); |
| 238 | fd[cpu][counter][thread] = -1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 239 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 240 | count[0] += single_count[0]; |
| 241 | if (scale) { |
| 242 | count[1] += single_count[1]; |
| 243 | count[2] += single_count[2]; |
| 244 | } |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 245 | } |
| 246 | } |
| 247 | |
| 248 | scaled = 0; |
| 249 | if (scale) { |
| 250 | if (count[2] == 0) { |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 251 | event_scaled[counter] = -1; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 252 | count[0] = 0; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 253 | return; |
| 254 | } |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 255 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 256 | if (count[2] < count[1]) { |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 257 | event_scaled[counter] = 1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 258 | count[0] = (unsigned long long) |
| 259 | ((double)count[0] * count[1] / count[2] + 0.5); |
| 260 | } |
| 261 | } |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 262 | |
| 263 | for (i = 0; i < 3; i++) |
| 264 | update_stats(&event_res_stats[counter][i], count[i]); |
| 265 | |
| 266 | if (verbose) { |
| 267 | fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter), |
| 268 | count[0], count[1], count[2]); |
| 269 | } |
| 270 | |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 271 | /* |
| 272 | * Save the full runtime - to allow normalization during printout: |
| 273 | */ |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 274 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 275 | update_stats(&runtime_nsecs_stats[0], count[0]); |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 276 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 277 | update_stats(&runtime_cycles_stats[0], count[0]); |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 278 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 279 | update_stats(&runtime_branches_stats[0], count[0]); |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * Read out the results of a single counter: |
| 284 | * do not aggregate counts across CPUs in system-wide mode |
| 285 | */ |
| 286 | static void read_counter(int counter) |
| 287 | { |
| 288 | u64 count[3]; |
| 289 | int cpu; |
| 290 | size_t res, nv; |
| 291 | |
| 292 | count[0] = count[1] = count[2] = 0; |
| 293 | |
| 294 | nv = scale ? 3 : 1; |
| 295 | |
| 296 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
| 297 | |
| 298 | if (fd[cpu][counter][0] < 0) |
| 299 | continue; |
| 300 | |
| 301 | res = read(fd[cpu][counter][0], count, nv * sizeof(u64)); |
| 302 | |
| 303 | assert(res == nv * sizeof(u64)); |
| 304 | |
| 305 | close(fd[cpu][counter][0]); |
| 306 | fd[cpu][counter][0] = -1; |
| 307 | |
| 308 | if (scale) { |
| 309 | if (count[2] == 0) { |
| 310 | count[0] = 0; |
| 311 | } else if (count[2] < count[1]) { |
| 312 | count[0] = (unsigned long long) |
| 313 | ((double)count[0] * count[1] / count[2] + 0.5); |
| 314 | } |
| 315 | } |
| 316 | cpu_counts[cpu][counter].val = count[0]; /* scaled count */ |
| 317 | cpu_counts[cpu][counter].ena = count[1]; |
| 318 | cpu_counts[cpu][counter].run = count[2]; |
| 319 | |
| 320 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
| 321 | update_stats(&runtime_nsecs_stats[cpu], count[0]); |
| 322 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
| 323 | update_stats(&runtime_cycles_stats[cpu], count[0]); |
| 324 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) |
| 325 | update_stats(&runtime_branches_stats[cpu], count[0]); |
| 326 | } |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 327 | } |
| 328 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 329 | static int run_perf_stat(int argc __used, const char **argv) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 330 | { |
| 331 | unsigned long long t0, t1; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 332 | int status = 0; |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 333 | int counter, ncreated = 0; |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 334 | int child_ready_pipe[2], go_pipe[2]; |
Zhang, Yanmin | 6be2850 | 2010-03-18 11:36:03 -0300 | [diff] [blame] | 335 | const bool forks = (argc > 0); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 336 | char buf; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 337 | |
| 338 | if (!system_wide) |
| 339 | nr_cpus = 1; |
| 340 | |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 341 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 342 | perror("failed to create pipes"); |
| 343 | exit(1); |
| 344 | } |
| 345 | |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 346 | if (forks) { |
Zhang, Yanmin | 6be2850 | 2010-03-18 11:36:03 -0300 | [diff] [blame] | 347 | if ((child_pid = fork()) < 0) |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 348 | perror("failed to fork"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 349 | |
Zhang, Yanmin | 6be2850 | 2010-03-18 11:36:03 -0300 | [diff] [blame] | 350 | if (!child_pid) { |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 351 | close(child_ready_pipe[0]); |
| 352 | close(go_pipe[1]); |
| 353 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
| 354 | |
| 355 | /* |
| 356 | * Do a dummy execvp to get the PLT entry resolved, |
| 357 | * so we avoid the resolver overhead on the real |
| 358 | * execvp call. |
| 359 | */ |
| 360 | execvp("", (char **)argv); |
| 361 | |
| 362 | /* |
| 363 | * Tell the parent we're ready to go |
| 364 | */ |
| 365 | close(child_ready_pipe[1]); |
| 366 | |
| 367 | /* |
| 368 | * Wait until the parent tells us to go. |
| 369 | */ |
| 370 | if (read(go_pipe[0], &buf, 1) == -1) |
| 371 | perror("unable to read pipe"); |
| 372 | |
| 373 | execvp(argv[0], (char **)argv); |
| 374 | |
| 375 | perror(argv[0]); |
| 376 | exit(-1); |
| 377 | } |
| 378 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 379 | if (target_tid == -1 && target_pid == -1 && !system_wide) |
| 380 | all_tids[0] = child_pid; |
| 381 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 382 | /* |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 383 | * Wait for the child to be ready to exec. |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 384 | */ |
| 385 | close(child_ready_pipe[1]); |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 386 | close(go_pipe[0]); |
| 387 | if (read(child_ready_pipe[0], &buf, 1) == -1) |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 388 | perror("unable to read pipe"); |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 389 | close(child_ready_pipe[0]); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 390 | } |
| 391 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 392 | for (counter = 0; counter < nr_counters; counter++) |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 393 | ncreated += create_perf_stat_counter(counter); |
| 394 | |
| 395 | if (ncreated == 0) { |
| 396 | pr_err("No permission to collect %sstats.\n" |
| 397 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid.\n", |
| 398 | system_wide ? "system-wide " : ""); |
| 399 | if (child_pid != -1) |
| 400 | kill(child_pid, SIGTERM); |
| 401 | return -1; |
| 402 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 403 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 404 | /* |
| 405 | * Enable counters and exec the command: |
| 406 | */ |
| 407 | t0 = rdclock(); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 408 | |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 409 | if (forks) { |
| 410 | close(go_pipe[1]); |
| 411 | wait(&status); |
| 412 | } else { |
Zhang, Yanmin | 6be2850 | 2010-03-18 11:36:03 -0300 | [diff] [blame] | 413 | while(!done) sleep(1); |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 414 | } |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 415 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 416 | t1 = rdclock(); |
| 417 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 418 | update_stats(&walltime_nsecs_stats, t1 - t0); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 419 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 420 | if (no_aggr) { |
| 421 | for (counter = 0; counter < nr_counters; counter++) |
| 422 | read_counter(counter); |
| 423 | } else { |
| 424 | for (counter = 0; counter < nr_counters; counter++) |
| 425 | read_counter_aggr(counter); |
| 426 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 427 | return WEXITSTATUS(status); |
| 428 | } |
| 429 | |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 430 | static void print_noise(int counter, double avg) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 431 | { |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 432 | if (run_count == 1) |
| 433 | return; |
| 434 | |
| 435 | fprintf(stderr, " ( +- %7.3f%% )", |
| 436 | 100 * stddev_stats(&event_res_stats[counter][0]) / avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 437 | } |
| 438 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 439 | static void nsec_printout(int cpu, int counter, double avg) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 440 | { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 441 | double msecs = avg / 1e6; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 442 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 443 | if (no_aggr) |
| 444 | fprintf(stderr, "CPU%-4d %18.6f %-24s", |
| 445 | cpumap[cpu], msecs, event_name(counter)); |
| 446 | else |
| 447 | fprintf(stderr, " %18.6f %-24s", msecs, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 448 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 449 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 450 | fprintf(stderr, " # %10.3f CPUs ", |
| 451 | avg / avg_stats(&walltime_nsecs_stats)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 452 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 453 | } |
| 454 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 455 | static void abs_printout(int cpu, int counter, double avg) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 456 | { |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 457 | double total, ratio = 0.0; |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 458 | char cpustr[16] = { '\0', }; |
| 459 | |
| 460 | if (no_aggr) |
| 461 | sprintf(cpustr, "CPU%-4d", cpumap[cpu]); |
| 462 | else |
| 463 | cpu = 0; |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 464 | |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 465 | if (big_num) |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 466 | fprintf(stderr, "%s %'18.0f %-24s", |
| 467 | cpustr, avg, event_name(counter)); |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 468 | else |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 469 | fprintf(stderr, "%s %18.0f %-24s", |
| 470 | cpustr, avg, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 471 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 472 | if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 473 | total = avg_stats(&runtime_cycles_stats[cpu]); |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 474 | |
| 475 | if (total) |
| 476 | ratio = avg / total; |
| 477 | |
| 478 | fprintf(stderr, " # %10.3f IPC ", ratio); |
Lucas De Marchi | 7255fe2 | 2009-11-15 12:05:08 -0200 | [diff] [blame] | 479 | } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) && |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 480 | runtime_branches_stats[cpu].n != 0) { |
| 481 | total = avg_stats(&runtime_branches_stats[cpu]); |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 482 | |
| 483 | if (total) |
| 484 | ratio = avg * 100 / total; |
| 485 | |
Ingo Molnar | dd86e72 | 2009-10-19 13:33:03 +0200 | [diff] [blame] | 486 | fprintf(stderr, " # %10.3f %% ", ratio); |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 487 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 488 | } else if (runtime_nsecs_stats[cpu].n != 0) { |
| 489 | total = avg_stats(&runtime_nsecs_stats[cpu]); |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 490 | |
| 491 | if (total) |
| 492 | ratio = 1000.0 * avg / total; |
| 493 | |
| 494 | fprintf(stderr, " # %10.3f M/sec", ratio); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 495 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | /* |
| 499 | * Print out the results of a single counter: |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 500 | * aggregated counts in system-wide mode |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 501 | */ |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 502 | static void print_counter_aggr(int counter) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 503 | { |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 504 | double avg = avg_stats(&event_res_stats[counter][0]); |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 505 | int scaled = event_scaled[counter]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 506 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 507 | if (scaled == -1) { |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 508 | fprintf(stderr, " %18s %-24s\n", |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 509 | "<not counted>", event_name(counter)); |
| 510 | return; |
| 511 | } |
| 512 | |
| 513 | if (nsec_counter(counter)) |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 514 | nsec_printout(-1, counter, avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 515 | else |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 516 | abs_printout(-1, counter, avg); |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 517 | |
| 518 | print_noise(counter, avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 519 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 520 | if (scaled) { |
| 521 | double avg_enabled, avg_running; |
| 522 | |
| 523 | avg_enabled = avg_stats(&event_res_stats[counter][1]); |
| 524 | avg_running = avg_stats(&event_res_stats[counter][2]); |
| 525 | |
Ingo Molnar | 210ad39 | 2009-06-29 21:50:54 +0200 | [diff] [blame] | 526 | fprintf(stderr, " (scaled from %.2f%%)", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 527 | 100 * avg_running / avg_enabled); |
| 528 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 529 | |
| 530 | fprintf(stderr, "\n"); |
| 531 | } |
| 532 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 533 | /* |
| 534 | * Print out the results of a single counter: |
| 535 | * does not use aggregated count in system-wide |
| 536 | */ |
| 537 | static void print_counter(int counter) |
| 538 | { |
| 539 | u64 ena, run, val; |
| 540 | int cpu; |
| 541 | |
| 542 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
| 543 | val = cpu_counts[cpu][counter].val; |
| 544 | ena = cpu_counts[cpu][counter].ena; |
| 545 | run = cpu_counts[cpu][counter].run; |
| 546 | if (run == 0 || ena == 0) { |
| 547 | fprintf(stderr, "CPU%-4d %18s %-24s", cpumap[cpu], |
| 548 | "<not counted>", event_name(counter)); |
| 549 | |
| 550 | fprintf(stderr, "\n"); |
| 551 | continue; |
| 552 | } |
| 553 | |
| 554 | if (nsec_counter(counter)) |
| 555 | nsec_printout(cpu, counter, val); |
| 556 | else |
| 557 | abs_printout(cpu, counter, val); |
| 558 | |
| 559 | print_noise(counter, 1.0); |
| 560 | |
| 561 | if (run != ena) { |
| 562 | fprintf(stderr, " (scaled from %.2f%%)", |
| 563 | 100.0 * run / ena); |
| 564 | } |
| 565 | fprintf(stderr, "\n"); |
| 566 | } |
| 567 | } |
| 568 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 569 | static void print_stat(int argc, const char **argv) |
| 570 | { |
| 571 | int i, counter; |
| 572 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 573 | fflush(stdout); |
| 574 | |
| 575 | fprintf(stderr, "\n"); |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 576 | fprintf(stderr, " Performance counter stats for "); |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 577 | if(target_pid == -1 && target_tid == -1) { |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 578 | fprintf(stderr, "\'%s", argv[0]); |
| 579 | for (i = 1; i < argc; i++) |
| 580 | fprintf(stderr, " %s", argv[i]); |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 581 | } else if (target_pid != -1) |
| 582 | fprintf(stderr, "process id \'%d", target_pid); |
| 583 | else |
| 584 | fprintf(stderr, "thread id \'%d", target_tid); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 585 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 586 | fprintf(stderr, "\'"); |
| 587 | if (run_count > 1) |
| 588 | fprintf(stderr, " (%d runs)", run_count); |
| 589 | fprintf(stderr, ":\n\n"); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 590 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 591 | if (no_aggr) { |
| 592 | for (counter = 0; counter < nr_counters; counter++) |
| 593 | print_counter(counter); |
| 594 | } else { |
| 595 | for (counter = 0; counter < nr_counters; counter++) |
| 596 | print_counter_aggr(counter); |
| 597 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 598 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 599 | fprintf(stderr, "\n"); |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 600 | fprintf(stderr, " %18.9f seconds time elapsed", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 601 | avg_stats(&walltime_nsecs_stats)/1e9); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 602 | if (run_count > 1) { |
| 603 | fprintf(stderr, " ( +- %7.3f%% )", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 604 | 100*stddev_stats(&walltime_nsecs_stats) / |
| 605 | avg_stats(&walltime_nsecs_stats)); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 606 | } |
| 607 | fprintf(stderr, "\n\n"); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 608 | } |
| 609 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 610 | static volatile int signr = -1; |
| 611 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 612 | static void skip_signal(int signo) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 613 | { |
Zhang, Yanmin | 6be2850 | 2010-03-18 11:36:03 -0300 | [diff] [blame] | 614 | if(child_pid == -1) |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 615 | done = 1; |
| 616 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 617 | signr = signo; |
| 618 | } |
| 619 | |
| 620 | static void sig_atexit(void) |
| 621 | { |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 622 | if (child_pid != -1) |
| 623 | kill(child_pid, SIGTERM); |
| 624 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 625 | if (signr == -1) |
| 626 | return; |
| 627 | |
| 628 | signal(signr, SIG_DFL); |
| 629 | kill(getpid(), signr); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 630 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 631 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 632 | static const char * const stat_usage[] = { |
Liming Wang | 60666c6 | 2009-12-31 16:05:50 +0800 | [diff] [blame] | 633 | "perf stat [<options>] [<command>]", |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 634 | NULL |
| 635 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 636 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 637 | static const struct option options[] = { |
| 638 | OPT_CALLBACK('e', "event", NULL, "event", |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 639 | "event selector. use 'perf list' to list available events", |
| 640 | parse_events), |
Stephane Eranian | 2e6cdf9 | 2010-05-12 10:40:01 +0200 | [diff] [blame] | 641 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
| 642 | "child tasks do not inherit counters"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 643 | OPT_INTEGER('p', "pid", &target_pid, |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 644 | "stat events on existing process id"), |
| 645 | OPT_INTEGER('t', "tid", &target_tid, |
| 646 | "stat events on existing thread id"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 647 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 648 | "system-wide collection from all CPUs"), |
Brice Goglin | b26bc5a | 2009-08-07 10:18:39 +0200 | [diff] [blame] | 649 | OPT_BOOLEAN('c', "scale", &scale, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 650 | "scale/normalize counters"), |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 651 | OPT_INCR('v', "verbose", &verbose, |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 652 | "be more verbose (show counter open errors, etc)"), |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 653 | OPT_INTEGER('r', "repeat", &run_count, |
| 654 | "repeat command and print average + stddev (max: 100)"), |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 655 | OPT_BOOLEAN('n', "null", &null_run, |
| 656 | "null run - dont start any counters"), |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 657 | OPT_BOOLEAN('B', "big-num", &big_num, |
| 658 | "print large numbers with thousands\' separators"), |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 659 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
| 660 | "list of cpus to monitor in system-wide"), |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 661 | OPT_BOOLEAN('A', "no-aggr", &no_aggr, |
| 662 | "disable CPU count aggregation"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 663 | OPT_END() |
| 664 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 665 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 666 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 667 | { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 668 | int status; |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 669 | int i,j; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 670 | |
Stephane Eranian | 5af52b5 | 2010-05-18 15:00:01 +0200 | [diff] [blame] | 671 | setlocale(LC_ALL, ""); |
| 672 | |
Anton Blanchard | a054123 | 2009-07-22 23:04:12 +1000 | [diff] [blame] | 673 | argc = parse_options(argc, argv, options, stat_usage, |
| 674 | PARSE_OPT_STOP_AT_NON_OPTION); |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 675 | if (!argc && target_pid == -1 && target_tid == -1) |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 676 | usage_with_options(stat_usage, options); |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 677 | if (run_count <= 0) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 678 | usage_with_options(stat_usage, options); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 679 | |
Stephane Eranian | f5b4a9c3 | 2010-11-16 11:05:01 +0200 | [diff] [blame^] | 680 | /* no_aggr is for system-wide only */ |
| 681 | if (no_aggr && !system_wide) |
| 682 | usage_with_options(stat_usage, options); |
| 683 | |
Jaswinder Singh Rajput | c304356 | 2009-06-27 23:49:09 +0530 | [diff] [blame] | 684 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
| 685 | if (!null_run && !nr_counters) { |
| 686 | memcpy(attrs, default_attrs, sizeof(default_attrs)); |
| 687 | nr_counters = ARRAY_SIZE(default_attrs); |
| 688 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 689 | |
Paul Mackerras | a12b51c | 2010-03-10 20:36:09 +1100 | [diff] [blame] | 690 | if (system_wide) |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 691 | nr_cpus = read_cpu_map(cpu_list); |
Paul Mackerras | a12b51c | 2010-03-10 20:36:09 +1100 | [diff] [blame] | 692 | else |
| 693 | nr_cpus = 1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 694 | |
Stephane Eranian | c45c6ea | 2010-05-28 12:00:01 +0200 | [diff] [blame] | 695 | if (nr_cpus < 1) |
| 696 | usage_with_options(stat_usage, options); |
| 697 | |
Zhang, Yanmin | d6d901c | 2010-03-18 11:36:05 -0300 | [diff] [blame] | 698 | if (target_pid != -1) { |
| 699 | target_tid = target_pid; |
| 700 | thread_num = find_all_tid(target_pid, &all_tids); |
| 701 | if (thread_num <= 0) { |
| 702 | fprintf(stderr, "Can't find all threads of pid %d\n", |
| 703 | target_pid); |
| 704 | usage_with_options(stat_usage, options); |
| 705 | } |
| 706 | } else { |
| 707 | all_tids=malloc(sizeof(pid_t)); |
| 708 | if (!all_tids) |
| 709 | return -ENOMEM; |
| 710 | |
| 711 | all_tids[0] = target_tid; |
| 712 | thread_num = 1; |
| 713 | } |
| 714 | |
| 715 | for (i = 0; i < MAX_NR_CPUS; i++) { |
| 716 | for (j = 0; j < MAX_COUNTERS; j++) { |
| 717 | fd[i][j] = malloc(sizeof(int)*thread_num); |
| 718 | if (!fd[i][j]) |
| 719 | return -ENOMEM; |
| 720 | } |
| 721 | } |
| 722 | |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 723 | /* |
| 724 | * We dont want to block the signals - that would cause |
| 725 | * child tasks to inherit that and Ctrl-C would not work. |
| 726 | * What we want is for Ctrl-C to work in the exec()-ed |
| 727 | * task, but being ignored by perf stat itself: |
| 728 | */ |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 729 | atexit(sig_atexit); |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 730 | signal(SIGINT, skip_signal); |
| 731 | signal(SIGALRM, skip_signal); |
| 732 | signal(SIGABRT, skip_signal); |
| 733 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 734 | status = 0; |
| 735 | for (run_idx = 0; run_idx < run_count; run_idx++) { |
| 736 | if (run_count != 1 && verbose) |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 737 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 738 | status = run_perf_stat(argc, argv); |
| 739 | } |
| 740 | |
Arnaldo Carvalho de Melo | 084ab9f | 2010-03-22 13:10:28 -0300 | [diff] [blame] | 741 | if (status != -1) |
| 742 | print_stat(argc, argv); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 743 | |
| 744 | return status; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 745 | } |