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> |
| 35 | * |
| 36 | * Released under the GPL v2. (and only v2, not any later version) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 37 | */ |
| 38 | |
Peter Zijlstra | 1a482f3 | 2009-05-23 18:28:58 +0200 | [diff] [blame] | 39 | #include "perf.h" |
Ingo Molnar | 16f762a | 2009-05-27 09:10:38 +0200 | [diff] [blame] | 40 | #include "builtin.h" |
Ingo Molnar | 148be2c | 2009-04-27 08:02:14 +0200 | [diff] [blame] | 41 | #include "util/util.h" |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 42 | #include "util/parse-options.h" |
| 43 | #include "util/parse-events.h" |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 44 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 45 | #include <sys/prctl.h> |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 46 | #include <math.h> |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 47 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 48 | static struct perf_counter_attr default_attrs[MAX_COUNTERS] = { |
| 49 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 50 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
| 51 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES}, |
| 52 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, |
| 53 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 54 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 55 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
| 56 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, |
| 57 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, |
| 58 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, |
| 59 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 60 | }; |
| 61 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 62 | static int system_wide = 0; |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 63 | static int inherit = 1; |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 64 | static int verbose = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 65 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 66 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
| 67 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 68 | static int target_pid = -1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 69 | static int nr_cpus = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 70 | static unsigned int page_size; |
| 71 | |
Ingo Molnar | 66cf782 | 2009-04-30 13:53:33 +0200 | [diff] [blame] | 72 | static int scale = 1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 73 | |
| 74 | static const unsigned int default_count[] = { |
| 75 | 1000000, |
| 76 | 1000000, |
| 77 | 10000, |
| 78 | 10000, |
| 79 | 1000000, |
| 80 | 10000, |
| 81 | }; |
| 82 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 83 | #define MAX_RUN 100 |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 84 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 85 | static int run_count = 1; |
| 86 | static int run_idx = 0; |
| 87 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 88 | static u64 event_res[MAX_RUN][MAX_COUNTERS][3]; |
| 89 | static u64 event_scaled[MAX_RUN][MAX_COUNTERS]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 90 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 91 | //static u64 event_hist[MAX_RUN][MAX_COUNTERS][3]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 92 | |
| 93 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 94 | static u64 runtime_nsecs[MAX_RUN]; |
| 95 | static u64 walltime_nsecs[MAX_RUN]; |
| 96 | static u64 runtime_cycles[MAX_RUN]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 97 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 98 | static u64 event_res_avg[MAX_COUNTERS][3]; |
| 99 | static u64 event_res_noise[MAX_COUNTERS][3]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 100 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 101 | static u64 event_scaled_avg[MAX_COUNTERS]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 102 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 103 | static u64 runtime_nsecs_avg; |
| 104 | static u64 runtime_nsecs_noise; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 105 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 106 | static u64 walltime_nsecs_avg; |
| 107 | static u64 walltime_nsecs_noise; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 108 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 109 | static u64 runtime_cycles_avg; |
| 110 | static u64 runtime_cycles_noise; |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 111 | |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame^] | 112 | |
| 113 | #define ERR_PERF_OPEN \ |
| 114 | "Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n" |
| 115 | |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 116 | static void create_perf_stat_counter(int counter) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 117 | { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 118 | struct perf_counter_attr *attr = attrs + counter; |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 119 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 120 | if (scale) |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 121 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
| 122 | PERF_FORMAT_TOTAL_TIME_RUNNING; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 123 | |
| 124 | if (system_wide) { |
| 125 | int cpu; |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame^] | 126 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 127 | fd[cpu][counter] = sys_perf_counter_open(attr, -1, cpu, -1, 0); |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame^] | 128 | if (fd[cpu][counter] < 0 && verbose) |
| 129 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 130 | fd[cpu][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 131 | } |
| 132 | } else { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 133 | attr->inherit = inherit; |
| 134 | attr->disabled = 1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 135 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 136 | fd[0][counter] = sys_perf_counter_open(attr, 0, -1, -1, 0); |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame^] | 137 | if (fd[0][counter] < 0 && verbose) |
| 138 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 139 | fd[0][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 140 | } |
| 141 | } |
| 142 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 143 | /* |
| 144 | * Does the counter have nsecs as a unit? |
| 145 | */ |
| 146 | static inline int nsec_counter(int counter) |
| 147 | { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 148 | if (attrs[counter].type != PERF_TYPE_SOFTWARE) |
| 149 | return 0; |
| 150 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 151 | if (attrs[counter].config == PERF_COUNT_SW_CPU_CLOCK) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 152 | return 1; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 153 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 154 | if (attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 155 | return 1; |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | /* |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 161 | * Read out the results of a single counter: |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 162 | */ |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 163 | static void read_counter(int counter) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 164 | { |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 165 | u64 *count, single_count[3]; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 166 | ssize_t res; |
| 167 | int cpu, nv; |
| 168 | int scaled; |
| 169 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 170 | count = event_res[run_idx][counter]; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 171 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 172 | count[0] = count[1] = count[2] = 0; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 173 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 174 | nv = scale ? 3 : 1; |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame^] | 175 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 176 | if (fd[cpu][counter] < 0) |
| 177 | continue; |
| 178 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 179 | res = read(fd[cpu][counter], single_count, nv * sizeof(u64)); |
| 180 | assert(res == nv * sizeof(u64)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 181 | close(fd[cpu][counter]); |
| 182 | fd[cpu][counter] = -1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 183 | |
| 184 | count[0] += single_count[0]; |
| 185 | if (scale) { |
| 186 | count[1] += single_count[1]; |
| 187 | count[2] += single_count[2]; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | scaled = 0; |
| 192 | if (scale) { |
| 193 | if (count[2] == 0) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 194 | event_scaled[run_idx][counter] = -1; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 195 | count[0] = 0; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 196 | return; |
| 197 | } |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 198 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 199 | if (count[2] < count[1]) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 200 | event_scaled[run_idx][counter] = 1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 201 | count[0] = (unsigned long long) |
| 202 | ((double)count[0] * count[1] / count[2] + 0.5); |
| 203 | } |
| 204 | } |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 205 | /* |
| 206 | * Save the full runtime - to allow normalization during printout: |
| 207 | */ |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 208 | if (attrs[counter].type == PERF_TYPE_SOFTWARE && |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 209 | attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 210 | runtime_nsecs[run_idx] = count[0]; |
Ingo Molnar | e779898 | 2009-06-07 18:14:46 +0200 | [diff] [blame] | 211 | if (attrs[counter].type == PERF_TYPE_HARDWARE && |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 212 | attrs[counter].config == PERF_COUNT_HW_CPU_CYCLES) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 213 | runtime_cycles[run_idx] = count[0]; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 214 | } |
| 215 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 216 | static int run_perf_stat(int argc, const char **argv) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 217 | { |
| 218 | unsigned long long t0, t1; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 219 | int status = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 220 | int counter; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 221 | int pid; |
| 222 | |
| 223 | if (!system_wide) |
| 224 | nr_cpus = 1; |
| 225 | |
| 226 | for (counter = 0; counter < nr_counters; counter++) |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 227 | create_perf_stat_counter(counter); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 228 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 229 | /* |
| 230 | * Enable counters and exec the command: |
| 231 | */ |
| 232 | t0 = rdclock(); |
| 233 | prctl(PR_TASK_PERF_COUNTERS_ENABLE); |
| 234 | |
| 235 | if ((pid = fork()) < 0) |
| 236 | perror("failed to fork"); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 237 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 238 | if (!pid) { |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 239 | if (execvp(argv[0], (char **)argv)) { |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 240 | perror(argv[0]); |
| 241 | exit(-1); |
| 242 | } |
| 243 | } |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 244 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 245 | wait(&status); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 246 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 247 | prctl(PR_TASK_PERF_COUNTERS_DISABLE); |
| 248 | t1 = rdclock(); |
| 249 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 250 | walltime_nsecs[run_idx] = t1 - t0; |
| 251 | |
| 252 | for (counter = 0; counter < nr_counters; counter++) |
| 253 | read_counter(counter); |
| 254 | |
| 255 | return WEXITSTATUS(status); |
| 256 | } |
| 257 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 258 | static void print_noise(u64 *count, u64 *noise) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 259 | { |
| 260 | if (run_count > 1) |
| 261 | fprintf(stderr, " ( +- %7.3f%% )", |
| 262 | (double)noise[0]/(count[0]+1)*100.0); |
| 263 | } |
| 264 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 265 | static void nsec_printout(int counter, u64 *count, u64 *noise) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 266 | { |
| 267 | double msecs = (double)count[0] / 1000000; |
| 268 | |
| 269 | fprintf(stderr, " %14.6f %-20s", msecs, event_name(counter)); |
| 270 | |
| 271 | if (attrs[counter].type == PERF_TYPE_SOFTWARE && |
| 272 | attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) { |
| 273 | |
| 274 | if (walltime_nsecs_avg) |
| 275 | fprintf(stderr, " # %10.3f CPUs ", |
| 276 | (double)count[0] / (double)walltime_nsecs_avg); |
| 277 | } |
| 278 | print_noise(count, noise); |
| 279 | } |
| 280 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 281 | static void abs_printout(int counter, u64 *count, u64 *noise) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 282 | { |
| 283 | fprintf(stderr, " %14Ld %-20s", count[0], event_name(counter)); |
| 284 | |
| 285 | if (runtime_cycles_avg && |
| 286 | attrs[counter].type == PERF_TYPE_HARDWARE && |
| 287 | attrs[counter].config == PERF_COUNT_HW_INSTRUCTIONS) { |
| 288 | |
| 289 | fprintf(stderr, " # %10.3f IPC ", |
| 290 | (double)count[0] / (double)runtime_cycles_avg); |
| 291 | } else { |
| 292 | if (runtime_nsecs_avg) { |
| 293 | fprintf(stderr, " # %10.3f M/sec", |
| 294 | (double)count[0]/runtime_nsecs_avg*1000.0); |
| 295 | } |
| 296 | } |
| 297 | print_noise(count, noise); |
| 298 | } |
| 299 | |
| 300 | /* |
| 301 | * Print out the results of a single counter: |
| 302 | */ |
| 303 | static void print_counter(int counter) |
| 304 | { |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 305 | u64 *count, *noise; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 306 | int scaled; |
| 307 | |
| 308 | count = event_res_avg[counter]; |
| 309 | noise = event_res_noise[counter]; |
| 310 | scaled = event_scaled_avg[counter]; |
| 311 | |
| 312 | if (scaled == -1) { |
| 313 | fprintf(stderr, " %14s %-20s\n", |
| 314 | "<not counted>", event_name(counter)); |
| 315 | return; |
| 316 | } |
| 317 | |
| 318 | if (nsec_counter(counter)) |
| 319 | nsec_printout(counter, count, noise); |
| 320 | else |
| 321 | abs_printout(counter, count, noise); |
| 322 | |
| 323 | if (scaled) |
| 324 | fprintf(stderr, " (scaled from %.2f%%)", |
| 325 | (double) count[2] / count[1] * 100); |
| 326 | |
| 327 | fprintf(stderr, "\n"); |
| 328 | } |
| 329 | |
| 330 | /* |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 331 | * normalize_noise noise values down to stddev: |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 332 | */ |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 333 | static void normalize_noise(u64 *val) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 334 | { |
| 335 | double res; |
| 336 | |
| 337 | res = (double)*val / (run_count * sqrt((double)run_count)); |
| 338 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 339 | *val = (u64)res; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 340 | } |
| 341 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 342 | static void update_avg(const char *name, int idx, u64 *avg, u64 *val) |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 343 | { |
| 344 | *avg += *val; |
| 345 | |
| 346 | if (verbose > 1) |
| 347 | fprintf(stderr, "debug: %20s[%d]: %Ld\n", name, idx, *val); |
| 348 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 349 | /* |
| 350 | * Calculate the averages and noises: |
| 351 | */ |
| 352 | static void calc_avg(void) |
| 353 | { |
| 354 | int i, j; |
| 355 | |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 356 | if (verbose > 1) |
| 357 | fprintf(stderr, "\n"); |
| 358 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 359 | for (i = 0; i < run_count; i++) { |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 360 | update_avg("runtime", 0, &runtime_nsecs_avg, runtime_nsecs + i); |
| 361 | update_avg("walltime", 0, &walltime_nsecs_avg, walltime_nsecs + i); |
| 362 | update_avg("runtime_cycles", 0, &runtime_cycles_avg, runtime_cycles + i); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 363 | |
| 364 | for (j = 0; j < nr_counters; j++) { |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 365 | update_avg("counter/0", j, |
| 366 | event_res_avg[j]+0, event_res[i][j]+0); |
| 367 | update_avg("counter/1", j, |
| 368 | event_res_avg[j]+1, event_res[i][j]+1); |
| 369 | update_avg("counter/2", j, |
| 370 | event_res_avg[j]+2, event_res[i][j]+2); |
| 371 | update_avg("scaled", j, |
| 372 | event_scaled_avg + j, event_scaled[i]+j); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 373 | } |
| 374 | } |
| 375 | runtime_nsecs_avg /= run_count; |
| 376 | walltime_nsecs_avg /= run_count; |
| 377 | runtime_cycles_avg /= run_count; |
| 378 | |
| 379 | for (j = 0; j < nr_counters; j++) { |
| 380 | event_res_avg[j][0] /= run_count; |
| 381 | event_res_avg[j][1] /= run_count; |
| 382 | event_res_avg[j][2] /= run_count; |
| 383 | } |
| 384 | |
| 385 | for (i = 0; i < run_count; i++) { |
| 386 | runtime_nsecs_noise += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 387 | abs((s64)(runtime_nsecs[i] - runtime_nsecs_avg)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 388 | walltime_nsecs_noise += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 389 | abs((s64)(walltime_nsecs[i] - walltime_nsecs_avg)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 390 | runtime_cycles_noise += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 391 | abs((s64)(runtime_cycles[i] - runtime_cycles_avg)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 392 | |
| 393 | for (j = 0; j < nr_counters; j++) { |
| 394 | event_res_noise[j][0] += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 395 | abs((s64)(event_res[i][j][0] - event_res_avg[j][0])); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 396 | event_res_noise[j][1] += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 397 | abs((s64)(event_res[i][j][1] - event_res_avg[j][1])); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 398 | event_res_noise[j][2] += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 399 | abs((s64)(event_res[i][j][2] - event_res_avg[j][2])); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 400 | } |
| 401 | } |
| 402 | |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 403 | normalize_noise(&runtime_nsecs_noise); |
| 404 | normalize_noise(&walltime_nsecs_noise); |
| 405 | normalize_noise(&runtime_cycles_noise); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 406 | |
| 407 | for (j = 0; j < nr_counters; j++) { |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 408 | normalize_noise(&event_res_noise[j][0]); |
| 409 | normalize_noise(&event_res_noise[j][1]); |
| 410 | normalize_noise(&event_res_noise[j][2]); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 411 | } |
| 412 | } |
| 413 | |
| 414 | static void print_stat(int argc, const char **argv) |
| 415 | { |
| 416 | int i, counter; |
| 417 | |
| 418 | calc_avg(); |
| 419 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 420 | fflush(stdout); |
| 421 | |
| 422 | fprintf(stderr, "\n"); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 423 | fprintf(stderr, " Performance counter stats for \'%s", argv[0]); |
| 424 | |
| 425 | for (i = 1; i < argc; i++) |
| 426 | fprintf(stderr, " %s", argv[i]); |
| 427 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 428 | fprintf(stderr, "\'"); |
| 429 | if (run_count > 1) |
| 430 | fprintf(stderr, " (%d runs)", run_count); |
| 431 | fprintf(stderr, ":\n\n"); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 432 | |
| 433 | for (counter = 0; counter < nr_counters; counter++) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 434 | print_counter(counter); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 435 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 436 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 437 | fprintf(stderr, "\n"); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 438 | fprintf(stderr, " %14.9f seconds time elapsed.\n", |
| 439 | (double)walltime_nsecs_avg/1e9); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 440 | fprintf(stderr, "\n"); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 441 | } |
| 442 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 443 | static volatile int signr = -1; |
| 444 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 445 | static void skip_signal(int signo) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 446 | { |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 447 | signr = signo; |
| 448 | } |
| 449 | |
| 450 | static void sig_atexit(void) |
| 451 | { |
| 452 | if (signr == -1) |
| 453 | return; |
| 454 | |
| 455 | signal(signr, SIG_DFL); |
| 456 | kill(getpid(), signr); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 457 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 458 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 459 | static const char * const stat_usage[] = { |
| 460 | "perf stat [<options>] <command>", |
| 461 | NULL |
| 462 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 463 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 464 | static const struct option options[] = { |
| 465 | OPT_CALLBACK('e', "event", NULL, "event", |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 466 | "event selector. use 'perf list' to list available events", |
| 467 | parse_events), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 468 | OPT_BOOLEAN('i', "inherit", &inherit, |
| 469 | "child tasks inherit counters"), |
| 470 | OPT_INTEGER('p', "pid", &target_pid, |
| 471 | "stat events on existing pid"), |
| 472 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
| 473 | "system-wide collection from all CPUs"), |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 474 | OPT_BOOLEAN('S', "scale", &scale, |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 475 | "scale/normalize counters"), |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 476 | OPT_BOOLEAN('v', "verbose", &verbose, |
| 477 | "be more verbose (show counter open errors, etc)"), |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 478 | OPT_INTEGER('r', "repeat", &run_count, |
| 479 | "repeat command and print average + stddev (max: 100)"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 480 | OPT_END() |
| 481 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 482 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 483 | int cmd_stat(int argc, const char **argv, const char *prefix) |
| 484 | { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 485 | int status; |
| 486 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 487 | page_size = sysconf(_SC_PAGE_SIZE); |
| 488 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 489 | memcpy(attrs, default_attrs, sizeof(attrs)); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 490 | |
| 491 | argc = parse_options(argc, argv, options, stat_usage, 0); |
| 492 | if (!argc) |
| 493 | usage_with_options(stat_usage, options); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 494 | if (run_count <= 0 || run_count > MAX_RUN) |
| 495 | usage_with_options(stat_usage, options); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 496 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 497 | if (!nr_counters) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 498 | nr_counters = 8; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 499 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 500 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 501 | assert(nr_cpus <= MAX_NR_CPUS); |
| 502 | assert(nr_cpus >= 0); |
| 503 | |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 504 | /* |
| 505 | * We dont want to block the signals - that would cause |
| 506 | * child tasks to inherit that and Ctrl-C would not work. |
| 507 | * What we want is for Ctrl-C to work in the exec()-ed |
| 508 | * task, but being ignored by perf stat itself: |
| 509 | */ |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 510 | atexit(sig_atexit); |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 511 | signal(SIGINT, skip_signal); |
| 512 | signal(SIGALRM, skip_signal); |
| 513 | signal(SIGABRT, skip_signal); |
| 514 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 515 | status = 0; |
| 516 | for (run_idx = 0; run_idx < run_count; run_idx++) { |
| 517 | if (run_count != 1 && verbose) |
| 518 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx+1); |
| 519 | status = run_perf_stat(argc, argv); |
| 520 | } |
| 521 | |
| 522 | print_stat(argc, argv); |
| 523 | |
| 524 | return status; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 525 | } |