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 | 8f28827a | 2009-08-16 22:05:48 +0200 | [diff] [blame] | 45 | #include "util/event.h" |
| 46 | #include "util/debug.h" |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 47 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 48 | #include <sys/prctl.h> |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 49 | #include <math.h> |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 50 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 51 | static struct perf_event_attr default_attrs[] = { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 52 | |
Ingo Molnar | 56aab46 | 2009-10-19 13:27:08 +0200 | [diff] [blame] | 53 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
| 54 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, |
| 55 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, |
| 56 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 57 | |
Ingo Molnar | 56aab46 | 2009-10-19 13:27:08 +0200 | [diff] [blame] | 58 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
| 59 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, |
Ingo Molnar | 56aab46 | 2009-10-19 13:27:08 +0200 | [diff] [blame] | 60 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, |
| 61 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, |
Ingo Molnar | dd86e72 | 2009-10-19 13:33:03 +0200 | [diff] [blame] | 62 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, |
| 63 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 64 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 65 | }; |
| 66 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 67 | static int system_wide = 0; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 68 | static unsigned int nr_cpus = 0; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 69 | static int run_idx = 0; |
| 70 | |
| 71 | static int run_count = 1; |
| 72 | static int inherit = 1; |
| 73 | static int scale = 1; |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 74 | static pid_t target_pid = -1; |
| 75 | static pid_t child_pid = -1; |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 76 | static int null_run = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 77 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 78 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
| 79 | |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 80 | static int event_scaled[MAX_COUNTERS]; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 81 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 82 | struct stats |
| 83 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 84 | double n, mean, M2; |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 85 | }; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 86 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 87 | static void update_stats(struct stats *stats, u64 val) |
| 88 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 89 | double delta; |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 90 | |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 91 | stats->n++; |
| 92 | delta = val - stats->mean; |
| 93 | stats->mean += delta / stats->n; |
| 94 | stats->M2 += delta*(val - stats->mean); |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 95 | } |
| 96 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 97 | static double avg_stats(struct stats *stats) |
| 98 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 99 | return stats->mean; |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 100 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 101 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 102 | /* |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 103 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance |
| 104 | * |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 105 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n |
| 106 | * s^2 = ------------------------------- |
| 107 | * n - 1 |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 108 | * |
| 109 | * http://en.wikipedia.org/wiki/Stddev |
| 110 | * |
| 111 | * The std dev of the mean is related to the std dev by: |
| 112 | * |
| 113 | * s |
| 114 | * s_mean = ------- |
| 115 | * sqrt(n) |
| 116 | * |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 117 | */ |
| 118 | static double stddev_stats(struct stats *stats) |
| 119 | { |
Peter Zijlstra | 8a02631 | 2009-09-04 17:26:26 +0200 | [diff] [blame] | 120 | double variance = stats->M2 / (stats->n - 1); |
| 121 | double variance_mean = variance / stats->n; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 122 | |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 123 | return sqrt(variance_mean); |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 124 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 125 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 126 | struct stats event_res_stats[MAX_COUNTERS][3]; |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 127 | struct stats runtime_nsecs_stats; |
| 128 | struct stats walltime_nsecs_stats; |
| 129 | struct stats runtime_cycles_stats; |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 130 | struct stats runtime_branches_stats; |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 131 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 132 | #define MATCH_EVENT(t, c, counter) \ |
| 133 | (attrs[counter].type == PERF_TYPE_##t && \ |
| 134 | attrs[counter].config == PERF_COUNT_##c) |
| 135 | |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 136 | #define ERR_PERF_OPEN \ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 137 | "Error: counter %d, sys_perf_event_open() syscall returned with %d (%s)\n" |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 138 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 139 | static void create_perf_stat_counter(int counter, int pid) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 140 | { |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 141 | struct perf_event_attr *attr = attrs + counter; |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 142 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 143 | if (scale) |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 144 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
| 145 | PERF_FORMAT_TOTAL_TIME_RUNNING; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 146 | |
| 147 | if (system_wide) { |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 148 | unsigned int cpu; |
| 149 | |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 150 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 151 | fd[cpu][counter] = sys_perf_event_open(attr, -1, cpu, -1, 0); |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 152 | if (fd[cpu][counter] < 0 && verbose) |
| 153 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 154 | fd[cpu][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 155 | } |
| 156 | } else { |
Paul Mackerras | 57e7986 | 2009-06-30 16:07:19 +1000 | [diff] [blame] | 157 | attr->inherit = inherit; |
| 158 | attr->disabled = 1; |
| 159 | attr->enable_on_exec = 1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 160 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 161 | fd[0][counter] = sys_perf_event_open(attr, pid, -1, -1, 0); |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 162 | if (fd[0][counter] < 0 && verbose) |
| 163 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 164 | fd[0][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 165 | } |
| 166 | } |
| 167 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 168 | /* |
| 169 | * Does the counter have nsecs as a unit? |
| 170 | */ |
| 171 | static inline int nsec_counter(int counter) |
| 172 | { |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 173 | if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) || |
| 174 | MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 175 | return 1; |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 181 | * Read out the results of a single counter: |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 182 | */ |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 183 | static void read_counter(int counter) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 184 | { |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 185 | u64 count[3], single_count[3]; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 186 | unsigned int cpu; |
| 187 | size_t res, nv; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 188 | int scaled; |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 189 | int i; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 190 | |
| 191 | count[0] = count[1] = count[2] = 0; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 192 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 193 | nv = scale ? 3 : 1; |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 194 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 195 | if (fd[cpu][counter] < 0) |
| 196 | continue; |
| 197 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 198 | res = read(fd[cpu][counter], single_count, nv * sizeof(u64)); |
| 199 | assert(res == nv * sizeof(u64)); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 200 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 201 | close(fd[cpu][counter]); |
| 202 | fd[cpu][counter] = -1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 203 | |
| 204 | count[0] += single_count[0]; |
| 205 | if (scale) { |
| 206 | count[1] += single_count[1]; |
| 207 | count[2] += single_count[2]; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | scaled = 0; |
| 212 | if (scale) { |
| 213 | if (count[2] == 0) { |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 214 | event_scaled[counter] = -1; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 215 | count[0] = 0; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 216 | return; |
| 217 | } |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 218 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 219 | if (count[2] < count[1]) { |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 220 | event_scaled[counter] = 1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 221 | count[0] = (unsigned long long) |
| 222 | ((double)count[0] * count[1] / count[2] + 0.5); |
| 223 | } |
| 224 | } |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 225 | |
| 226 | for (i = 0; i < 3; i++) |
| 227 | update_stats(&event_res_stats[counter][i], count[i]); |
| 228 | |
| 229 | if (verbose) { |
| 230 | fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter), |
| 231 | count[0], count[1], count[2]); |
| 232 | } |
| 233 | |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 234 | /* |
| 235 | * Save the full runtime - to allow normalization during printout: |
| 236 | */ |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 237 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 238 | update_stats(&runtime_nsecs_stats, count[0]); |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 239 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 240 | update_stats(&runtime_cycles_stats, count[0]); |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 241 | if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter)) |
| 242 | update_stats(&runtime_branches_stats, count[0]); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 243 | } |
| 244 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 245 | static int run_perf_stat(int argc __used, const char **argv) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 246 | { |
| 247 | unsigned long long t0, t1; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 248 | int status = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 249 | int counter; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 250 | int pid; |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 251 | int child_ready_pipe[2], go_pipe[2]; |
| 252 | char buf; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 253 | |
| 254 | if (!system_wide) |
| 255 | nr_cpus = 1; |
| 256 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 257 | if (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0) { |
| 258 | perror("failed to create pipes"); |
| 259 | exit(1); |
| 260 | } |
| 261 | |
| 262 | if ((pid = fork()) < 0) |
| 263 | perror("failed to fork"); |
| 264 | |
| 265 | if (!pid) { |
| 266 | close(child_ready_pipe[0]); |
| 267 | close(go_pipe[1]); |
| 268 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
| 269 | |
| 270 | /* |
| 271 | * Do a dummy execvp to get the PLT entry resolved, |
| 272 | * so we avoid the resolver overhead on the real |
| 273 | * execvp call. |
| 274 | */ |
| 275 | execvp("", (char **)argv); |
| 276 | |
| 277 | /* |
| 278 | * Tell the parent we're ready to go |
| 279 | */ |
| 280 | close(child_ready_pipe[1]); |
| 281 | |
| 282 | /* |
| 283 | * Wait until the parent tells us to go. |
| 284 | */ |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 285 | if (read(go_pipe[0], &buf, 1) == -1) |
| 286 | perror("unable to read pipe"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 287 | |
| 288 | execvp(argv[0], (char **)argv); |
| 289 | |
| 290 | perror(argv[0]); |
| 291 | exit(-1); |
| 292 | } |
| 293 | |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 294 | child_pid = pid; |
| 295 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 296 | /* |
| 297 | * Wait for the child to be ready to exec. |
| 298 | */ |
| 299 | close(child_ready_pipe[1]); |
| 300 | close(go_pipe[0]); |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 301 | if (read(child_ready_pipe[0], &buf, 1) == -1) |
| 302 | perror("unable to read pipe"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 303 | close(child_ready_pipe[0]); |
| 304 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 305 | for (counter = 0; counter < nr_counters; counter++) |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 306 | create_perf_stat_counter(counter, pid); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 307 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 308 | /* |
| 309 | * Enable counters and exec the command: |
| 310 | */ |
| 311 | t0 = rdclock(); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 312 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 313 | close(go_pipe[1]); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 314 | wait(&status); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 315 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 316 | t1 = rdclock(); |
| 317 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 318 | update_stats(&walltime_nsecs_stats, t1 - t0); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 319 | |
| 320 | for (counter = 0; counter < nr_counters; counter++) |
| 321 | read_counter(counter); |
| 322 | |
| 323 | return WEXITSTATUS(status); |
| 324 | } |
| 325 | |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 326 | static void print_noise(int counter, double avg) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 327 | { |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 328 | if (run_count == 1) |
| 329 | return; |
| 330 | |
| 331 | fprintf(stderr, " ( +- %7.3f%% )", |
| 332 | 100 * stddev_stats(&event_res_stats[counter][0]) / avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 333 | } |
| 334 | |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 335 | static void nsec_printout(int counter, double avg) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 336 | { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 337 | double msecs = avg / 1e6; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 338 | |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 339 | fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 340 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 341 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 342 | fprintf(stderr, " # %10.3f CPUs ", |
| 343 | avg / avg_stats(&walltime_nsecs_stats)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 344 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 345 | } |
| 346 | |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 347 | static void abs_printout(int counter, double avg) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 348 | { |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 349 | double total, ratio = 0.0; |
| 350 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 351 | fprintf(stderr, " %14.0f %-24s", avg, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 352 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 353 | if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 354 | total = avg_stats(&runtime_cycles_stats); |
| 355 | |
| 356 | if (total) |
| 357 | ratio = avg / total; |
| 358 | |
| 359 | fprintf(stderr, " # %10.3f IPC ", ratio); |
Lucas De Marchi | 7255fe2 | 2009-11-15 12:05:08 -0200 | [diff] [blame^] | 360 | } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) && |
| 361 | runtime_branches_stats.n != 0) { |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 362 | total = avg_stats(&runtime_branches_stats); |
| 363 | |
| 364 | if (total) |
| 365 | ratio = avg * 100 / total; |
| 366 | |
Ingo Molnar | dd86e72 | 2009-10-19 13:33:03 +0200 | [diff] [blame] | 367 | fprintf(stderr, " # %10.3f %% ", ratio); |
Anton Blanchard | 1101820 | 2009-10-18 22:29:23 +1100 | [diff] [blame] | 368 | |
Lucas De Marchi | 7255fe2 | 2009-11-15 12:05:08 -0200 | [diff] [blame^] | 369 | } else if (runtime_nsecs_stats.n != 0) { |
Ingo Molnar | c7f7fea | 2009-09-22 14:53:51 +0200 | [diff] [blame] | 370 | total = avg_stats(&runtime_nsecs_stats); |
| 371 | |
| 372 | if (total) |
| 373 | ratio = 1000.0 * avg / total; |
| 374 | |
| 375 | fprintf(stderr, " # %10.3f M/sec", ratio); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 376 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | /* |
| 380 | * Print out the results of a single counter: |
| 381 | */ |
| 382 | static void print_counter(int counter) |
| 383 | { |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 384 | double avg = avg_stats(&event_res_stats[counter][0]); |
Peter Zijlstra | 63d40de | 2009-09-04 17:03:13 +0200 | [diff] [blame] | 385 | int scaled = event_scaled[counter]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 386 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 387 | if (scaled == -1) { |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 388 | fprintf(stderr, " %14s %-24s\n", |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 389 | "<not counted>", event_name(counter)); |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | if (nsec_counter(counter)) |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 394 | nsec_printout(counter, avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 395 | else |
Peter Zijlstra | 849abde | 2009-09-04 18:23:38 +0200 | [diff] [blame] | 396 | abs_printout(counter, avg); |
| 397 | |
| 398 | print_noise(counter, avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 399 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 400 | if (scaled) { |
| 401 | double avg_enabled, avg_running; |
| 402 | |
| 403 | avg_enabled = avg_stats(&event_res_stats[counter][1]); |
| 404 | avg_running = avg_stats(&event_res_stats[counter][2]); |
| 405 | |
Ingo Molnar | 210ad39 | 2009-06-29 21:50:54 +0200 | [diff] [blame] | 406 | fprintf(stderr, " (scaled from %.2f%%)", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 407 | 100 * avg_running / avg_enabled); |
| 408 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 409 | |
| 410 | fprintf(stderr, "\n"); |
| 411 | } |
| 412 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 413 | static void print_stat(int argc, const char **argv) |
| 414 | { |
| 415 | int i, counter; |
| 416 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 417 | fflush(stdout); |
| 418 | |
| 419 | fprintf(stderr, "\n"); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 420 | fprintf(stderr, " Performance counter stats for \'%s", argv[0]); |
| 421 | |
| 422 | for (i = 1; i < argc; i++) |
| 423 | fprintf(stderr, " %s", argv[i]); |
| 424 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 425 | fprintf(stderr, "\'"); |
| 426 | if (run_count > 1) |
| 427 | fprintf(stderr, " (%d runs)", run_count); |
| 428 | fprintf(stderr, ":\n\n"); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 429 | |
| 430 | for (counter = 0; counter < nr_counters; counter++) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 431 | print_counter(counter); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 432 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 433 | fprintf(stderr, "\n"); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 434 | fprintf(stderr, " %14.9f seconds time elapsed", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 435 | avg_stats(&walltime_nsecs_stats)/1e9); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 436 | if (run_count > 1) { |
| 437 | fprintf(stderr, " ( +- %7.3f%% )", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 438 | 100*stddev_stats(&walltime_nsecs_stats) / |
| 439 | avg_stats(&walltime_nsecs_stats)); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 440 | } |
| 441 | fprintf(stderr, "\n\n"); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 442 | } |
| 443 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 444 | static volatile int signr = -1; |
| 445 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 446 | static void skip_signal(int signo) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 447 | { |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 448 | signr = signo; |
| 449 | } |
| 450 | |
| 451 | static void sig_atexit(void) |
| 452 | { |
Chris Wilson | 933da83 | 2009-10-04 01:35:01 +0100 | [diff] [blame] | 453 | if (child_pid != -1) |
| 454 | kill(child_pid, SIGTERM); |
| 455 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 456 | if (signr == -1) |
| 457 | return; |
| 458 | |
| 459 | signal(signr, SIG_DFL); |
| 460 | kill(getpid(), signr); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 461 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 462 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 463 | static const char * const stat_usage[] = { |
| 464 | "perf stat [<options>] <command>", |
| 465 | NULL |
| 466 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 467 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 468 | static const struct option options[] = { |
| 469 | OPT_CALLBACK('e', "event", NULL, "event", |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 470 | "event selector. use 'perf list' to list available events", |
| 471 | parse_events), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 472 | OPT_BOOLEAN('i', "inherit", &inherit, |
| 473 | "child tasks inherit counters"), |
| 474 | OPT_INTEGER('p', "pid", &target_pid, |
| 475 | "stat events on existing pid"), |
| 476 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 477 | "system-wide collection from all CPUs"), |
Brice Goglin | b26bc5a | 2009-08-07 10:18:39 +0200 | [diff] [blame] | 478 | OPT_BOOLEAN('c', "scale", &scale, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 479 | "scale/normalize counters"), |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 480 | OPT_BOOLEAN('v', "verbose", &verbose, |
| 481 | "be more verbose (show counter open errors, etc)"), |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 482 | OPT_INTEGER('r', "repeat", &run_count, |
| 483 | "repeat command and print average + stddev (max: 100)"), |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 484 | OPT_BOOLEAN('n', "null", &null_run, |
| 485 | "null run - dont start any counters"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 486 | OPT_END() |
| 487 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 488 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 489 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 490 | { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 491 | int status; |
| 492 | |
Anton Blanchard | a054123 | 2009-07-22 23:04:12 +1000 | [diff] [blame] | 493 | argc = parse_options(argc, argv, options, stat_usage, |
| 494 | PARSE_OPT_STOP_AT_NON_OPTION); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 495 | if (!argc) |
| 496 | usage_with_options(stat_usage, options); |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame] | 497 | if (run_count <= 0) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 498 | usage_with_options(stat_usage, options); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 499 | |
Jaswinder Singh Rajput | c304356 | 2009-06-27 23:49:09 +0530 | [diff] [blame] | 500 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
| 501 | if (!null_run && !nr_counters) { |
| 502 | memcpy(attrs, default_attrs, sizeof(default_attrs)); |
| 503 | nr_counters = ARRAY_SIZE(default_attrs); |
| 504 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 505 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 506 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 507 | assert(nr_cpus <= MAX_NR_CPUS); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 508 | assert((int)nr_cpus >= 0); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 509 | |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 510 | /* |
| 511 | * We dont want to block the signals - that would cause |
| 512 | * child tasks to inherit that and Ctrl-C would not work. |
| 513 | * What we want is for Ctrl-C to work in the exec()-ed |
| 514 | * task, but being ignored by perf stat itself: |
| 515 | */ |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 516 | atexit(sig_atexit); |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 517 | signal(SIGINT, skip_signal); |
| 518 | signal(SIGALRM, skip_signal); |
| 519 | signal(SIGABRT, skip_signal); |
| 520 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 521 | status = 0; |
| 522 | for (run_idx = 0; run_idx < run_count; run_idx++) { |
| 523 | if (run_count != 1 && verbose) |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 524 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 525 | status = run_perf_stat(argc, argv); |
| 526 | } |
| 527 | |
| 528 | print_stat(argc, argv); |
| 529 | |
| 530 | return status; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 531 | } |