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" |
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 | |
Jaswinder Singh Rajput | c304356 | 2009-06-27 23:49:09 +0530 | [diff] [blame] | 51 | static struct perf_counter_attr default_attrs[] = { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 52 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +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 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 58 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
| 59 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, |
| 60 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, |
| 61 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, |
| 62 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 63 | }; |
| 64 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 65 | static int system_wide = 0; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 66 | static unsigned int nr_cpus = 0; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 67 | static int run_idx = 0; |
| 68 | |
| 69 | static int run_count = 1; |
| 70 | static int inherit = 1; |
| 71 | static int scale = 1; |
| 72 | static int target_pid = -1; |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 73 | static int null_run = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 74 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 75 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
| 76 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 77 | static u64 event_res[MAX_COUNTERS][3]; |
| 78 | static u64 event_scaled[MAX_COUNTERS]; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 79 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 80 | struct stats |
| 81 | { |
| 82 | double sum; |
| 83 | double sum_sq; |
| 84 | }; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 85 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 86 | static void update_stats(struct stats *stats, u64 val) |
| 87 | { |
| 88 | double sq = val; |
| 89 | |
| 90 | stats->sum += val; |
| 91 | stats->sum_sq += sq * sq; |
| 92 | } |
| 93 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 94 | static double avg_stats(struct stats *stats) |
| 95 | { |
| 96 | return stats->sum / run_count; |
| 97 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 98 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 99 | /* |
| 100 | * stddev = sqrt(1/N (\Sum n_i^2) - avg(n)^2) |
| 101 | */ |
| 102 | static double stddev_stats(struct stats *stats) |
| 103 | { |
| 104 | double avg = stats->sum / run_count; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 105 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 106 | return sqrt(stats->sum_sq/run_count - avg*avg); |
| 107 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 108 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 109 | struct stats event_res_stats[MAX_COUNTERS][3]; |
| 110 | struct stats event_scaled_stats[MAX_COUNTERS]; |
| 111 | struct stats runtime_nsecs_stats; |
| 112 | struct stats walltime_nsecs_stats; |
| 113 | struct stats runtime_cycles_stats; |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 114 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 115 | #define MATCH_EVENT(t, c, counter) \ |
| 116 | (attrs[counter].type == PERF_TYPE_##t && \ |
| 117 | attrs[counter].config == PERF_COUNT_##c) |
| 118 | |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 119 | #define ERR_PERF_OPEN \ |
| 120 | "Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n" |
| 121 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 122 | static void create_perf_stat_counter(int counter, int pid) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 123 | { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 124 | struct perf_counter_attr *attr = attrs + counter; |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 125 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 126 | if (scale) |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 127 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
| 128 | PERF_FORMAT_TOTAL_TIME_RUNNING; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 129 | |
| 130 | if (system_wide) { |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 131 | unsigned int cpu; |
| 132 | |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 133 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 134 | fd[cpu][counter] = sys_perf_counter_open(attr, -1, cpu, -1, 0); |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 135 | if (fd[cpu][counter] < 0 && verbose) |
| 136 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 137 | fd[cpu][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 138 | } |
| 139 | } else { |
Paul Mackerras | 57e7986 | 2009-06-30 16:07:19 +1000 | [diff] [blame] | 140 | attr->inherit = inherit; |
| 141 | attr->disabled = 1; |
| 142 | attr->enable_on_exec = 1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 143 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 144 | fd[0][counter] = sys_perf_counter_open(attr, pid, -1, -1, 0); |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 145 | if (fd[0][counter] < 0 && verbose) |
| 146 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 147 | fd[0][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 148 | } |
| 149 | } |
| 150 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 151 | /* |
| 152 | * Does the counter have nsecs as a unit? |
| 153 | */ |
| 154 | static inline int nsec_counter(int counter) |
| 155 | { |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 156 | if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) || |
| 157 | MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 158 | return 1; |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | /* |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 164 | * Read out the results of a single counter: |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 165 | */ |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 166 | static void read_counter(int counter) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 167 | { |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 168 | u64 *count, single_count[3]; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 169 | unsigned int cpu; |
| 170 | size_t res, nv; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 171 | int scaled; |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 172 | int i; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 173 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 174 | count = event_res[counter]; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 175 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 176 | count[0] = count[1] = count[2] = 0; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 177 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 178 | nv = scale ? 3 : 1; |
Jaswinder Singh Rajput | cca03c0a | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 179 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 180 | if (fd[cpu][counter] < 0) |
| 181 | continue; |
| 182 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 183 | res = read(fd[cpu][counter], single_count, nv * sizeof(u64)); |
| 184 | assert(res == nv * sizeof(u64)); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 185 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 186 | close(fd[cpu][counter]); |
| 187 | fd[cpu][counter] = -1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 188 | |
| 189 | count[0] += single_count[0]; |
| 190 | if (scale) { |
| 191 | count[1] += single_count[1]; |
| 192 | count[2] += single_count[2]; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | scaled = 0; |
| 197 | if (scale) { |
| 198 | if (count[2] == 0) { |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 199 | event_scaled[counter] = -1; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 200 | count[0] = 0; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 201 | return; |
| 202 | } |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 203 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 204 | if (count[2] < count[1]) { |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 205 | event_scaled[counter] = 1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 206 | count[0] = (unsigned long long) |
| 207 | ((double)count[0] * count[1] / count[2] + 0.5); |
| 208 | } |
| 209 | } |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 210 | |
| 211 | for (i = 0; i < 3; i++) |
| 212 | update_stats(&event_res_stats[counter][i], count[i]); |
| 213 | |
| 214 | if (verbose) { |
| 215 | fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter), |
| 216 | count[0], count[1], count[2]); |
| 217 | } |
| 218 | |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 219 | /* |
| 220 | * Save the full runtime - to allow normalization during printout: |
| 221 | */ |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 222 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 223 | update_stats(&runtime_nsecs_stats, count[0]); |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 224 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 225 | update_stats(&runtime_cycles_stats, count[0]); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 226 | } |
| 227 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 228 | static int run_perf_stat(int argc __used, const char **argv) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 229 | { |
| 230 | unsigned long long t0, t1; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 231 | int status = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 232 | int counter; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 233 | int pid; |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 234 | int child_ready_pipe[2], go_pipe[2]; |
| 235 | char buf; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 236 | |
| 237 | if (!system_wide) |
| 238 | nr_cpus = 1; |
| 239 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 240 | if (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0) { |
| 241 | perror("failed to create pipes"); |
| 242 | exit(1); |
| 243 | } |
| 244 | |
| 245 | if ((pid = fork()) < 0) |
| 246 | perror("failed to fork"); |
| 247 | |
| 248 | if (!pid) { |
| 249 | close(child_ready_pipe[0]); |
| 250 | close(go_pipe[1]); |
| 251 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
| 252 | |
| 253 | /* |
| 254 | * Do a dummy execvp to get the PLT entry resolved, |
| 255 | * so we avoid the resolver overhead on the real |
| 256 | * execvp call. |
| 257 | */ |
| 258 | execvp("", (char **)argv); |
| 259 | |
| 260 | /* |
| 261 | * Tell the parent we're ready to go |
| 262 | */ |
| 263 | close(child_ready_pipe[1]); |
| 264 | |
| 265 | /* |
| 266 | * Wait until the parent tells us to go. |
| 267 | */ |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 268 | if (read(go_pipe[0], &buf, 1) == -1) |
| 269 | perror("unable to read pipe"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 270 | |
| 271 | execvp(argv[0], (char **)argv); |
| 272 | |
| 273 | perror(argv[0]); |
| 274 | exit(-1); |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * Wait for the child to be ready to exec. |
| 279 | */ |
| 280 | close(child_ready_pipe[1]); |
| 281 | close(go_pipe[0]); |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 282 | if (read(child_ready_pipe[0], &buf, 1) == -1) |
| 283 | perror("unable to read pipe"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 284 | close(child_ready_pipe[0]); |
| 285 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 286 | for (counter = 0; counter < nr_counters; counter++) |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 287 | create_perf_stat_counter(counter, pid); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 288 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 289 | /* |
| 290 | * Enable counters and exec the command: |
| 291 | */ |
| 292 | t0 = rdclock(); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 293 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 294 | close(go_pipe[1]); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 295 | wait(&status); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 296 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 297 | t1 = rdclock(); |
| 298 | |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 299 | update_stats(&walltime_nsecs_stats, t1 - t0); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 300 | |
| 301 | for (counter = 0; counter < nr_counters; counter++) |
| 302 | read_counter(counter); |
| 303 | |
| 304 | return WEXITSTATUS(status); |
| 305 | } |
| 306 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 307 | static void print_noise(double avg, double stddev) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 308 | { |
| 309 | if (run_count > 1) |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 310 | fprintf(stderr, " ( +- %7.3f%% )", 100*stddev / avg); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 311 | } |
| 312 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 313 | static void nsec_printout(int counter, double avg, double stddev) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 314 | { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 315 | double msecs = avg / 1e6; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 316 | |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 317 | fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 318 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 319 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 320 | fprintf(stderr, " # %10.3f CPUs ", |
| 321 | avg / avg_stats(&walltime_nsecs_stats)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 322 | } |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 323 | print_noise(avg, stddev); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 324 | } |
| 325 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 326 | static void abs_printout(int counter, double avg, double stddev) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 327 | { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 328 | fprintf(stderr, " %14.0f %-24s", avg, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 329 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 330 | if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 331 | fprintf(stderr, " # %10.3f IPC ", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 332 | avg / avg_stats(&runtime_cycles_stats)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 333 | } else { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 334 | fprintf(stderr, " # %10.3f M/sec", |
| 335 | 1000.0 * avg / avg_stats(&runtime_nsecs_stats)); |
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 | print_noise(avg, stddev); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | /* |
| 341 | * Print out the results of a single counter: |
| 342 | */ |
| 343 | static void print_counter(int counter) |
| 344 | { |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 345 | double avg, stddev; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 346 | int scaled; |
| 347 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 348 | avg = avg_stats(&event_res_stats[counter][0]); |
| 349 | stddev = stddev_stats(&event_res_stats[counter][0]); |
| 350 | scaled = avg_stats(&event_scaled_stats[counter]); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 351 | |
| 352 | if (scaled == -1) { |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 353 | fprintf(stderr, " %14s %-24s\n", |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 354 | "<not counted>", event_name(counter)); |
| 355 | return; |
| 356 | } |
| 357 | |
| 358 | if (nsec_counter(counter)) |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 359 | nsec_printout(counter, avg, stddev); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 360 | else |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 361 | abs_printout(counter, avg, stddev); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 362 | |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 363 | if (scaled) { |
| 364 | double avg_enabled, avg_running; |
| 365 | |
| 366 | avg_enabled = avg_stats(&event_res_stats[counter][1]); |
| 367 | avg_running = avg_stats(&event_res_stats[counter][2]); |
| 368 | |
Ingo Molnar | 210ad39 | 2009-06-29 21:50:54 +0200 | [diff] [blame] | 369 | fprintf(stderr, " (scaled from %.2f%%)", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 370 | 100 * avg_running / avg_enabled); |
| 371 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 372 | |
| 373 | fprintf(stderr, "\n"); |
| 374 | } |
| 375 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 376 | static void print_stat(int argc, const char **argv) |
| 377 | { |
| 378 | int i, counter; |
| 379 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 380 | fflush(stdout); |
| 381 | |
| 382 | fprintf(stderr, "\n"); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 383 | fprintf(stderr, " Performance counter stats for \'%s", argv[0]); |
| 384 | |
| 385 | for (i = 1; i < argc; i++) |
| 386 | fprintf(stderr, " %s", argv[i]); |
| 387 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 388 | fprintf(stderr, "\'"); |
| 389 | if (run_count > 1) |
| 390 | fprintf(stderr, " (%d runs)", run_count); |
| 391 | fprintf(stderr, ":\n\n"); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 392 | |
| 393 | for (counter = 0; counter < nr_counters; counter++) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 394 | print_counter(counter); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 395 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 396 | fprintf(stderr, "\n"); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 397 | fprintf(stderr, " %14.9f seconds time elapsed", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 398 | avg_stats(&walltime_nsecs_stats)/1e9); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 399 | if (run_count > 1) { |
| 400 | fprintf(stderr, " ( +- %7.3f%% )", |
Peter Zijlstra | 506d4bc | 2009-09-04 15:36:12 +0200 | [diff] [blame] | 401 | 100*stddev_stats(&walltime_nsecs_stats) / |
| 402 | avg_stats(&walltime_nsecs_stats)); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 403 | } |
| 404 | fprintf(stderr, "\n\n"); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 405 | } |
| 406 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 407 | static volatile int signr = -1; |
| 408 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 409 | static void skip_signal(int signo) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 410 | { |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 411 | signr = signo; |
| 412 | } |
| 413 | |
| 414 | static void sig_atexit(void) |
| 415 | { |
| 416 | if (signr == -1) |
| 417 | return; |
| 418 | |
| 419 | signal(signr, SIG_DFL); |
| 420 | kill(getpid(), signr); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 421 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 422 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 423 | static const char * const stat_usage[] = { |
| 424 | "perf stat [<options>] <command>", |
| 425 | NULL |
| 426 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 427 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 428 | static const struct option options[] = { |
| 429 | OPT_CALLBACK('e', "event", NULL, "event", |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 430 | "event selector. use 'perf list' to list available events", |
| 431 | parse_events), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 432 | OPT_BOOLEAN('i', "inherit", &inherit, |
| 433 | "child tasks inherit counters"), |
| 434 | OPT_INTEGER('p', "pid", &target_pid, |
| 435 | "stat events on existing pid"), |
| 436 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 437 | "system-wide collection from all CPUs"), |
Brice Goglin | b26bc5a | 2009-08-07 10:18:39 +0200 | [diff] [blame] | 438 | OPT_BOOLEAN('c', "scale", &scale, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 439 | "scale/normalize counters"), |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 440 | OPT_BOOLEAN('v', "verbose", &verbose, |
| 441 | "be more verbose (show counter open errors, etc)"), |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 442 | OPT_INTEGER('r', "repeat", &run_count, |
| 443 | "repeat command and print average + stddev (max: 100)"), |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 444 | OPT_BOOLEAN('n', "null", &null_run, |
| 445 | "null run - dont start any counters"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 446 | OPT_END() |
| 447 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 448 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 449 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 450 | { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 451 | int status; |
| 452 | |
Anton Blanchard | a054123 | 2009-07-22 23:04:12 +1000 | [diff] [blame] | 453 | argc = parse_options(argc, argv, options, stat_usage, |
| 454 | PARSE_OPT_STOP_AT_NON_OPTION); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 455 | if (!argc) |
| 456 | usage_with_options(stat_usage, options); |
Peter Zijlstra | 9e9772c | 2009-09-04 15:36:08 +0200 | [diff] [blame^] | 457 | if (run_count <= 0) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 458 | usage_with_options(stat_usage, options); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 459 | |
Jaswinder Singh Rajput | c304356 | 2009-06-27 23:49:09 +0530 | [diff] [blame] | 460 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
| 461 | if (!null_run && !nr_counters) { |
| 462 | memcpy(attrs, default_attrs, sizeof(default_attrs)); |
| 463 | nr_counters = ARRAY_SIZE(default_attrs); |
| 464 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 465 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 466 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 467 | assert(nr_cpus <= MAX_NR_CPUS); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 468 | assert((int)nr_cpus >= 0); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 469 | |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 470 | /* |
| 471 | * We dont want to block the signals - that would cause |
| 472 | * child tasks to inherit that and Ctrl-C would not work. |
| 473 | * What we want is for Ctrl-C to work in the exec()-ed |
| 474 | * task, but being ignored by perf stat itself: |
| 475 | */ |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 476 | atexit(sig_atexit); |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 477 | signal(SIGINT, skip_signal); |
| 478 | signal(SIGALRM, skip_signal); |
| 479 | signal(SIGABRT, skip_signal); |
| 480 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 481 | status = 0; |
| 482 | for (run_idx = 0; run_idx < run_count; run_idx++) { |
| 483 | if (run_count != 1 && verbose) |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 484 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 485 | status = run_perf_stat(argc, argv); |
| 486 | } |
| 487 | |
| 488 | print_stat(argc, argv); |
| 489 | |
| 490 | return status; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 491 | } |