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" |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 45 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 46 | #include <sys/prctl.h> |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 47 | #include <math.h> |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 48 | |
Jaswinder Singh Rajput | c304356 | 2009-06-27 23:49:09 +0530 | [diff] [blame] | 49 | static struct perf_counter_attr default_attrs[] = { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 50 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 51 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, |
| 52 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES}, |
| 53 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, |
| 54 | { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 55 | |
Peter Zijlstra | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 56 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, |
| 57 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, |
| 58 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, |
| 59 | { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, |
| 60 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 61 | }; |
| 62 | |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 63 | #define MAX_RUN 100 |
| 64 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 65 | static int system_wide = 0; |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 66 | static int verbose = 0; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 67 | static unsigned int nr_cpus = 0; |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 68 | static int run_idx = 0; |
| 69 | |
| 70 | static int run_count = 1; |
| 71 | static int inherit = 1; |
| 72 | static int scale = 1; |
| 73 | static int target_pid = -1; |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 74 | static int null_run = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 75 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 76 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
| 77 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 78 | static u64 runtime_nsecs[MAX_RUN]; |
| 79 | static u64 walltime_nsecs[MAX_RUN]; |
| 80 | static u64 runtime_cycles[MAX_RUN]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 81 | |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 82 | static u64 event_res[MAX_RUN][MAX_COUNTERS][3]; |
| 83 | static u64 event_scaled[MAX_RUN][MAX_COUNTERS]; |
| 84 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 85 | static u64 event_res_avg[MAX_COUNTERS][3]; |
| 86 | static u64 event_res_noise[MAX_COUNTERS][3]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 87 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 88 | static u64 event_scaled_avg[MAX_COUNTERS]; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 89 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 90 | static u64 runtime_nsecs_avg; |
| 91 | static u64 runtime_nsecs_noise; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 92 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 93 | static u64 walltime_nsecs_avg; |
| 94 | static u64 walltime_nsecs_noise; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 95 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 96 | static u64 runtime_cycles_avg; |
| 97 | static u64 runtime_cycles_noise; |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 98 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 99 | #define MATCH_EVENT(t, c, counter) \ |
| 100 | (attrs[counter].type == PERF_TYPE_##t && \ |
| 101 | attrs[counter].config == PERF_COUNT_##c) |
| 102 | |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 103 | #define ERR_PERF_OPEN \ |
| 104 | "Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n" |
| 105 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 106 | static void create_perf_stat_counter(int counter, int pid) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 107 | { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 108 | struct perf_counter_attr *attr = attrs + counter; |
Peter Zijlstra | 16c8a10 | 2009-05-05 17:50:27 +0200 | [diff] [blame] | 109 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 110 | if (scale) |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 111 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
| 112 | PERF_FORMAT_TOTAL_TIME_RUNNING; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 113 | |
| 114 | if (system_wide) { |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 115 | unsigned int cpu; |
| 116 | |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 117 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 118 | 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] | 119 | if (fd[cpu][counter] < 0 && verbose) |
| 120 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 121 | fd[cpu][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 122 | } |
| 123 | } else { |
Paul Mackerras | 57e7986 | 2009-06-30 16:07:19 +1000 | [diff] [blame] | 124 | attr->inherit = inherit; |
| 125 | attr->disabled = 1; |
| 126 | attr->enable_on_exec = 1; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 127 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 128 | fd[0][counter] = sys_perf_counter_open(attr, pid, -1, -1, 0); |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 129 | if (fd[0][counter] < 0 && verbose) |
| 130 | fprintf(stderr, ERR_PERF_OPEN, counter, |
| 131 | fd[0][counter], strerror(errno)); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 132 | } |
| 133 | } |
| 134 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 135 | /* |
| 136 | * Does the counter have nsecs as a unit? |
| 137 | */ |
| 138 | static inline int nsec_counter(int counter) |
| 139 | { |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 140 | if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) || |
| 141 | MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 142 | return 1; |
| 143 | |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | /* |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 148 | * Read out the results of a single counter: |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 149 | */ |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 150 | static void read_counter(int counter) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 151 | { |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 152 | u64 *count, single_count[3]; |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 153 | unsigned int cpu; |
| 154 | size_t res, nv; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 155 | int scaled; |
| 156 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 157 | count = event_res[run_idx][counter]; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 158 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 159 | count[0] = count[1] = count[2] = 0; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 160 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 161 | nv = scale ? 3 : 1; |
Jaswinder Singh Rajput | cca03c0 | 2009-06-23 17:12:49 +0530 | [diff] [blame] | 162 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 163 | if (fd[cpu][counter] < 0) |
| 164 | continue; |
| 165 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 166 | res = read(fd[cpu][counter], single_count, nv * sizeof(u64)); |
| 167 | assert(res == nv * sizeof(u64)); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 168 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 169 | close(fd[cpu][counter]); |
| 170 | fd[cpu][counter] = -1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 171 | |
| 172 | count[0] += single_count[0]; |
| 173 | if (scale) { |
| 174 | count[1] += single_count[1]; |
| 175 | count[2] += single_count[2]; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | scaled = 0; |
| 180 | if (scale) { |
| 181 | if (count[2] == 0) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 182 | event_scaled[run_idx][counter] = -1; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 183 | count[0] = 0; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 184 | return; |
| 185 | } |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 186 | |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 187 | if (count[2] < count[1]) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 188 | event_scaled[run_idx][counter] = 1; |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 189 | count[0] = (unsigned long long) |
| 190 | ((double)count[0] * count[1] / count[2] + 0.5); |
| 191 | } |
| 192 | } |
Ingo Molnar | be1ac0d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 193 | /* |
| 194 | * Save the full runtime - to allow normalization during printout: |
| 195 | */ |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 196 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 197 | runtime_nsecs[run_idx] = count[0]; |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 198 | if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter)) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 199 | runtime_cycles[run_idx] = count[0]; |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 200 | } |
| 201 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 202 | static int run_perf_stat(int argc __used, const char **argv) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 203 | { |
| 204 | unsigned long long t0, t1; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 205 | int status = 0; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 206 | int counter; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 207 | int pid; |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 208 | int child_ready_pipe[2], go_pipe[2]; |
| 209 | char buf; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 210 | |
| 211 | if (!system_wide) |
| 212 | nr_cpus = 1; |
| 213 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 214 | if (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0) { |
| 215 | perror("failed to create pipes"); |
| 216 | exit(1); |
| 217 | } |
| 218 | |
| 219 | if ((pid = fork()) < 0) |
| 220 | perror("failed to fork"); |
| 221 | |
| 222 | if (!pid) { |
| 223 | close(child_ready_pipe[0]); |
| 224 | close(go_pipe[1]); |
| 225 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
| 226 | |
| 227 | /* |
| 228 | * Do a dummy execvp to get the PLT entry resolved, |
| 229 | * so we avoid the resolver overhead on the real |
| 230 | * execvp call. |
| 231 | */ |
| 232 | execvp("", (char **)argv); |
| 233 | |
| 234 | /* |
| 235 | * Tell the parent we're ready to go |
| 236 | */ |
| 237 | close(child_ready_pipe[1]); |
| 238 | |
| 239 | /* |
| 240 | * Wait until the parent tells us to go. |
| 241 | */ |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 242 | if (read(go_pipe[0], &buf, 1) == -1) |
| 243 | perror("unable to read pipe"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 244 | |
| 245 | execvp(argv[0], (char **)argv); |
| 246 | |
| 247 | perror(argv[0]); |
| 248 | exit(-1); |
| 249 | } |
| 250 | |
| 251 | /* |
| 252 | * Wait for the child to be ready to exec. |
| 253 | */ |
| 254 | close(child_ready_pipe[1]); |
| 255 | close(go_pipe[0]); |
Frederic Weisbecker | a92bef0 | 2009-07-01 21:02:10 +0200 | [diff] [blame] | 256 | if (read(child_ready_pipe[0], &buf, 1) == -1) |
| 257 | perror("unable to read pipe"); |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 258 | close(child_ready_pipe[0]); |
| 259 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 260 | for (counter = 0; counter < nr_counters; counter++) |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 261 | create_perf_stat_counter(counter, pid); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 262 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 263 | /* |
| 264 | * Enable counters and exec the command: |
| 265 | */ |
| 266 | t0 = rdclock(); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 267 | |
Paul Mackerras | 051ae7f | 2009-06-29 21:13:21 +1000 | [diff] [blame] | 268 | close(go_pipe[1]); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 269 | wait(&status); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 270 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 271 | t1 = rdclock(); |
| 272 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 273 | walltime_nsecs[run_idx] = t1 - t0; |
| 274 | |
| 275 | for (counter = 0; counter < nr_counters; counter++) |
| 276 | read_counter(counter); |
| 277 | |
| 278 | return WEXITSTATUS(status); |
| 279 | } |
| 280 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 281 | static void print_noise(u64 *count, u64 *noise) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 282 | { |
| 283 | if (run_count > 1) |
| 284 | fprintf(stderr, " ( +- %7.3f%% )", |
| 285 | (double)noise[0]/(count[0]+1)*100.0); |
| 286 | } |
| 287 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 288 | static void nsec_printout(int counter, u64 *count, u64 *noise) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 289 | { |
| 290 | double msecs = (double)count[0] / 1000000; |
| 291 | |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 292 | fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 293 | |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 294 | if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 295 | if (walltime_nsecs_avg) |
| 296 | fprintf(stderr, " # %10.3f CPUs ", |
| 297 | (double)count[0] / (double)walltime_nsecs_avg); |
| 298 | } |
| 299 | print_noise(count, noise); |
| 300 | } |
| 301 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 302 | static void abs_printout(int counter, u64 *count, u64 *noise) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 303 | { |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 304 | fprintf(stderr, " %14Ld %-24s", count[0], event_name(counter)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 305 | |
| 306 | if (runtime_cycles_avg && |
Jaswinder Singh Rajput | b9ebdcc | 2009-07-01 15:05:09 +0530 | [diff] [blame] | 307 | MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 308 | fprintf(stderr, " # %10.3f IPC ", |
| 309 | (double)count[0] / (double)runtime_cycles_avg); |
| 310 | } else { |
| 311 | if (runtime_nsecs_avg) { |
| 312 | fprintf(stderr, " # %10.3f M/sec", |
| 313 | (double)count[0]/runtime_nsecs_avg*1000.0); |
| 314 | } |
| 315 | } |
| 316 | print_noise(count, noise); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * Print out the results of a single counter: |
| 321 | */ |
| 322 | static void print_counter(int counter) |
| 323 | { |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 324 | u64 *count, *noise; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 325 | int scaled; |
| 326 | |
| 327 | count = event_res_avg[counter]; |
| 328 | noise = event_res_noise[counter]; |
| 329 | scaled = event_scaled_avg[counter]; |
| 330 | |
| 331 | if (scaled == -1) { |
Jaswinder Singh Rajput | 6e750a8f | 2009-06-27 03:02:07 +0530 | [diff] [blame] | 332 | fprintf(stderr, " %14s %-24s\n", |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 333 | "<not counted>", event_name(counter)); |
| 334 | return; |
| 335 | } |
| 336 | |
| 337 | if (nsec_counter(counter)) |
| 338 | nsec_printout(counter, count, noise); |
| 339 | else |
| 340 | abs_printout(counter, count, noise); |
| 341 | |
| 342 | if (scaled) |
Ingo Molnar | 210ad39 | 2009-06-29 21:50:54 +0200 | [diff] [blame] | 343 | fprintf(stderr, " (scaled from %.2f%%)", |
| 344 | (double) count[2] / count[1] * 100); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 345 | |
| 346 | fprintf(stderr, "\n"); |
| 347 | } |
| 348 | |
| 349 | /* |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 350 | * normalize_noise noise values down to stddev: |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 351 | */ |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 352 | static void normalize_noise(u64 *val) |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 353 | { |
| 354 | double res; |
| 355 | |
| 356 | res = (double)*val / (run_count * sqrt((double)run_count)); |
| 357 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 358 | *val = (u64)res; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 359 | } |
| 360 | |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 361 | 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] | 362 | { |
| 363 | *avg += *val; |
| 364 | |
| 365 | if (verbose > 1) |
| 366 | fprintf(stderr, "debug: %20s[%d]: %Ld\n", name, idx, *val); |
| 367 | } |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 368 | /* |
| 369 | * Calculate the averages and noises: |
| 370 | */ |
| 371 | static void calc_avg(void) |
| 372 | { |
| 373 | int i, j; |
| 374 | |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 375 | if (verbose > 1) |
| 376 | fprintf(stderr, "\n"); |
| 377 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 378 | for (i = 0; i < run_count; i++) { |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 379 | update_avg("runtime", 0, &runtime_nsecs_avg, runtime_nsecs + i); |
| 380 | update_avg("walltime", 0, &walltime_nsecs_avg, walltime_nsecs + i); |
| 381 | update_avg("runtime_cycles", 0, &runtime_cycles_avg, runtime_cycles + i); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 382 | |
| 383 | for (j = 0; j < nr_counters; j++) { |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 384 | update_avg("counter/0", j, |
| 385 | event_res_avg[j]+0, event_res[i][j]+0); |
| 386 | update_avg("counter/1", j, |
| 387 | event_res_avg[j]+1, event_res[i][j]+1); |
| 388 | update_avg("counter/2", j, |
| 389 | event_res_avg[j]+2, event_res[i][j]+2); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 390 | if (event_scaled[i][j] != (u64)-1) |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 391 | update_avg("scaled", j, |
| 392 | event_scaled_avg + j, event_scaled[i]+j); |
| 393 | else |
| 394 | event_scaled_avg[j] = -1; |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 395 | } |
| 396 | } |
| 397 | runtime_nsecs_avg /= run_count; |
| 398 | walltime_nsecs_avg /= run_count; |
| 399 | runtime_cycles_avg /= run_count; |
| 400 | |
| 401 | for (j = 0; j < nr_counters; j++) { |
| 402 | event_res_avg[j][0] /= run_count; |
| 403 | event_res_avg[j][1] /= run_count; |
| 404 | event_res_avg[j][2] /= run_count; |
| 405 | } |
| 406 | |
| 407 | for (i = 0; i < run_count; i++) { |
| 408 | runtime_nsecs_noise += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 409 | abs((s64)(runtime_nsecs[i] - runtime_nsecs_avg)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 410 | walltime_nsecs_noise += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 411 | abs((s64)(walltime_nsecs[i] - walltime_nsecs_avg)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 412 | runtime_cycles_noise += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 413 | abs((s64)(runtime_cycles[i] - runtime_cycles_avg)); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 414 | |
| 415 | for (j = 0; j < nr_counters; j++) { |
| 416 | event_res_noise[j][0] += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 417 | abs((s64)(event_res[i][j][0] - event_res_avg[j][0])); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 418 | event_res_noise[j][1] += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 419 | abs((s64)(event_res[i][j][1] - event_res_avg[j][1])); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 420 | event_res_noise[j][2] += |
Paul Mackerras | 9cffa8d | 2009-06-19 22:21:42 +1000 | [diff] [blame] | 421 | abs((s64)(event_res[i][j][2] - event_res_avg[j][2])); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 422 | } |
| 423 | } |
| 424 | |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 425 | normalize_noise(&runtime_nsecs_noise); |
| 426 | normalize_noise(&walltime_nsecs_noise); |
| 427 | normalize_noise(&runtime_cycles_noise); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 428 | |
| 429 | for (j = 0; j < nr_counters; j++) { |
Ingo Molnar | ef281a1 | 2009-06-13 15:40:35 +0200 | [diff] [blame] | 430 | normalize_noise(&event_res_noise[j][0]); |
| 431 | normalize_noise(&event_res_noise[j][1]); |
| 432 | normalize_noise(&event_res_noise[j][2]); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 433 | } |
| 434 | } |
| 435 | |
| 436 | static void print_stat(int argc, const char **argv) |
| 437 | { |
| 438 | int i, counter; |
| 439 | |
| 440 | calc_avg(); |
| 441 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 442 | fflush(stdout); |
| 443 | |
| 444 | fprintf(stderr, "\n"); |
Ingo Molnar | 44db76c | 2009-06-03 19:36:07 +0200 | [diff] [blame] | 445 | fprintf(stderr, " Performance counter stats for \'%s", argv[0]); |
| 446 | |
| 447 | for (i = 1; i < argc; i++) |
| 448 | fprintf(stderr, " %s", argv[i]); |
| 449 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 450 | fprintf(stderr, "\'"); |
| 451 | if (run_count > 1) |
| 452 | fprintf(stderr, " (%d runs)", run_count); |
| 453 | fprintf(stderr, ":\n\n"); |
Ingo Molnar | 2996f5d | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 454 | |
| 455 | for (counter = 0; counter < nr_counters; counter++) |
Ingo Molnar | c04f5e5 | 2009-05-29 09:10:54 +0200 | [diff] [blame] | 456 | print_counter(counter); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 457 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 458 | fprintf(stderr, "\n"); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 459 | fprintf(stderr, " %14.9f seconds time elapsed", |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 460 | (double)walltime_nsecs_avg/1e9); |
Ingo Molnar | 566747e | 2009-06-27 06:24:32 +0200 | [diff] [blame] | 461 | if (run_count > 1) { |
| 462 | fprintf(stderr, " ( +- %7.3f%% )", |
| 463 | 100.0*(double)walltime_nsecs_noise/(double)walltime_nsecs_avg); |
| 464 | } |
| 465 | fprintf(stderr, "\n\n"); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 466 | } |
| 467 | |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 468 | static volatile int signr = -1; |
| 469 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 470 | static void skip_signal(int signo) |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 471 | { |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 472 | signr = signo; |
| 473 | } |
| 474 | |
| 475 | static void sig_atexit(void) |
| 476 | { |
| 477 | if (signr == -1) |
| 478 | return; |
| 479 | |
| 480 | signal(signr, SIG_DFL); |
| 481 | kill(getpid(), signr); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 482 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 483 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 484 | static const char * const stat_usage[] = { |
| 485 | "perf stat [<options>] <command>", |
| 486 | NULL |
| 487 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 488 | |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 489 | static const struct option options[] = { |
| 490 | OPT_CALLBACK('e', "event", NULL, "event", |
Thomas Gleixner | 86847b6 | 2009-06-06 12:24:17 +0200 | [diff] [blame] | 491 | "event selector. use 'perf list' to list available events", |
| 492 | parse_events), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 493 | OPT_BOOLEAN('i', "inherit", &inherit, |
| 494 | "child tasks inherit counters"), |
| 495 | OPT_INTEGER('p', "pid", &target_pid, |
| 496 | "stat events on existing pid"), |
| 497 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 498 | "system-wide collection from all CPUs"), |
Brice Goglin | b26bc5a | 2009-08-07 10:18:39 +0200 | [diff] [blame] | 499 | OPT_BOOLEAN('c', "scale", &scale, |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 500 | "scale/normalize counters"), |
Ingo Molnar | 743ee1f | 2009-06-07 17:06:46 +0200 | [diff] [blame] | 501 | OPT_BOOLEAN('v', "verbose", &verbose, |
| 502 | "be more verbose (show counter open errors, etc)"), |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 503 | OPT_INTEGER('r', "repeat", &run_count, |
| 504 | "repeat command and print average + stddev (max: 100)"), |
Ingo Molnar | 0cfb7a1 | 2009-06-27 06:10:30 +0200 | [diff] [blame] | 505 | OPT_BOOLEAN('n', "null", &null_run, |
| 506 | "null run - dont start any counters"), |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 507 | OPT_END() |
| 508 | }; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 509 | |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 510 | int cmd_stat(int argc, const char **argv, const char *prefix __used) |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 511 | { |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 512 | int status; |
| 513 | |
Anton Blanchard | a054123 | 2009-07-22 23:04:12 +1000 | [diff] [blame] | 514 | argc = parse_options(argc, argv, options, stat_usage, |
| 515 | PARSE_OPT_STOP_AT_NON_OPTION); |
Ingo Molnar | 5242519 | 2009-05-26 09:17:18 +0200 | [diff] [blame] | 516 | if (!argc) |
| 517 | usage_with_options(stat_usage, options); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 518 | if (run_count <= 0 || run_count > MAX_RUN) |
| 519 | usage_with_options(stat_usage, options); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 520 | |
Jaswinder Singh Rajput | c304356 | 2009-06-27 23:49:09 +0530 | [diff] [blame] | 521 | /* Set attrs and nr_counters if no event is selected and !null_run */ |
| 522 | if (!null_run && !nr_counters) { |
| 523 | memcpy(attrs, default_attrs, sizeof(default_attrs)); |
| 524 | nr_counters = ARRAY_SIZE(default_attrs); |
| 525 | } |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 526 | |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 527 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 528 | assert(nr_cpus <= MAX_NR_CPUS); |
Ingo Molnar | f37a291 | 2009-07-01 12:37:06 +0200 | [diff] [blame] | 529 | assert((int)nr_cpus >= 0); |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 530 | |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 531 | /* |
| 532 | * We dont want to block the signals - that would cause |
| 533 | * child tasks to inherit that and Ctrl-C would not work. |
| 534 | * What we want is for Ctrl-C to work in the exec()-ed |
| 535 | * task, but being ignored by perf stat itself: |
| 536 | */ |
Peter Zijlstra | f7b7c26 | 2009-06-10 15:55:59 +0200 | [diff] [blame] | 537 | atexit(sig_atexit); |
Ingo Molnar | 58d7e99 | 2009-05-15 11:03:23 +0200 | [diff] [blame] | 538 | signal(SIGINT, skip_signal); |
| 539 | signal(SIGALRM, skip_signal); |
| 540 | signal(SIGABRT, skip_signal); |
| 541 | |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 542 | status = 0; |
| 543 | for (run_idx = 0; run_idx < run_count; run_idx++) { |
| 544 | if (run_count != 1 && verbose) |
Jaswinder Singh Rajput | 3d63259 | 2009-06-24 18:19:34 +0530 | [diff] [blame] | 545 | fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); |
Ingo Molnar | 42202dd | 2009-06-13 14:57:28 +0200 | [diff] [blame] | 546 | status = run_perf_stat(argc, argv); |
| 547 | } |
| 548 | |
| 549 | print_stat(argc, argv); |
| 550 | |
| 551 | return status; |
Ingo Molnar | ddcacfa | 2009-04-20 15:37:32 +0200 | [diff] [blame] | 552 | } |