Eric Rowe | 987f27f | 2012-03-26 16:55:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012, The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * * Neither the name of Google, Inc. nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this |
| 16 | * software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 22 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 24 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 25 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 26 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 27 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 28 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
Elliott Hughes | 8678c6f | 2015-01-29 21:26:35 -0800 | [diff] [blame] | 34 | #include <string.h> |
Eric Rowe | 987f27f | 2012-03-26 16:55:30 -0700 | [diff] [blame] | 35 | #include <unistd.h> |
| 36 | |
| 37 | #define MAX_BUF_SIZE 64 |
| 38 | |
| 39 | struct freq_info { |
| 40 | unsigned freq; |
| 41 | long unsigned time; |
| 42 | }; |
| 43 | |
| 44 | struct cpu_info { |
| 45 | long unsigned utime, ntime, stime, itime, iowtime, irqtime, sirqtime; |
| 46 | struct freq_info *freqs; |
| 47 | int freq_count; |
| 48 | }; |
| 49 | |
| 50 | #define die(...) { fprintf(stderr, __VA_ARGS__); exit(EXIT_FAILURE); } |
| 51 | |
| 52 | static struct cpu_info old_total_cpu, new_total_cpu, *old_cpus, *new_cpus; |
| 53 | static int cpu_count, delay, iterations; |
| 54 | static char minimal, aggregate_freq_stats; |
| 55 | |
| 56 | static int get_cpu_count(); |
| 57 | static int get_cpu_count_from_file(char *filename); |
| 58 | static long unsigned get_cpu_total_time(struct cpu_info *cpu); |
| 59 | static int get_freq_scales_count(int cpu); |
| 60 | static void print_stats(); |
| 61 | static void print_cpu_stats(char *label, struct cpu_info *new_cpu, struct cpu_info *old_cpu, |
| 62 | char print_freq); |
| 63 | static void print_freq_stats(struct cpu_info *new_cpu, struct cpu_info *old_cpu); |
| 64 | static void read_stats(); |
| 65 | static void read_freq_stats(int cpu); |
| 66 | static char should_aggregate_freq_stats(); |
| 67 | static char should_print_freq_stats(); |
| 68 | static void usage(char *cmd); |
| 69 | |
| 70 | int main(int argc, char *argv[]) { |
| 71 | struct cpu_info *tmp_cpus, tmp_total_cpu; |
| 72 | int i, freq_count; |
| 73 | |
| 74 | delay = 3; |
| 75 | iterations = -1; |
| 76 | minimal = 0; |
| 77 | aggregate_freq_stats = 0; |
| 78 | |
| 79 | for (i = 0; i < argc; i++) { |
| 80 | if (!strcmp(argv[i], "-n")) { |
| 81 | if (i + 1 >= argc) { |
| 82 | fprintf(stderr, "Option -n expects an argument.\n"); |
| 83 | usage(argv[0]); |
| 84 | exit(EXIT_FAILURE); |
| 85 | } |
| 86 | iterations = atoi(argv[++i]); |
| 87 | continue; |
| 88 | } |
| 89 | if (!strcmp(argv[i], "-d")) { |
| 90 | if (i + 1 >= argc) { |
| 91 | fprintf(stderr, "Option -d expects an argument.\n"); |
| 92 | usage(argv[0]); |
| 93 | exit(EXIT_FAILURE); |
| 94 | } |
| 95 | delay = atoi(argv[++i]); |
| 96 | continue; |
| 97 | } |
| 98 | if (!strcmp(argv[i], "-m")) { |
| 99 | minimal = 1; |
| 100 | } |
| 101 | if (!strcmp(argv[i], "-h")) { |
| 102 | usage(argv[0]); |
| 103 | exit(EXIT_SUCCESS); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | cpu_count = get_cpu_count(); |
| 108 | |
| 109 | old_cpus = malloc(sizeof(struct cpu_info) * cpu_count); |
| 110 | if (!old_cpus) die("Could not allocate struct cpu_info\n"); |
| 111 | new_cpus = malloc(sizeof(struct cpu_info) * cpu_count); |
| 112 | if (!new_cpus) die("Could not allocate struct cpu_info\n"); |
| 113 | |
| 114 | for (i = 0; i < cpu_count; i++) { |
| 115 | old_cpus[i].freq_count = new_cpus[i].freq_count = get_freq_scales_count(i); |
| 116 | new_cpus[i].freqs = malloc(sizeof(struct freq_info) * new_cpus[i].freq_count); |
| 117 | if (!new_cpus[i].freqs) die("Could not allocate struct freq_info\n"); |
| 118 | old_cpus[i].freqs = malloc(sizeof(struct freq_info) * old_cpus[i].freq_count); |
| 119 | if (!old_cpus[i].freqs) die("Could not allocate struct freq_info\n"); |
| 120 | } |
| 121 | |
| 122 | // Read stats without aggregating freq stats in the total cpu |
| 123 | read_stats(); |
| 124 | |
| 125 | aggregate_freq_stats = should_aggregate_freq_stats(); |
| 126 | if (aggregate_freq_stats) { |
| 127 | old_total_cpu.freq_count = new_total_cpu.freq_count = new_cpus[0].freq_count; |
| 128 | new_total_cpu.freqs = malloc(sizeof(struct freq_info) * new_total_cpu.freq_count); |
| 129 | if (!new_total_cpu.freqs) die("Could not allocate struct freq_info\n"); |
| 130 | old_total_cpu.freqs = malloc(sizeof(struct freq_info) * old_total_cpu.freq_count); |
| 131 | if (!old_total_cpu.freqs) die("Could not allocate struct freq_info\n"); |
| 132 | |
| 133 | // Read stats again with aggregating freq stats in the total cpu |
| 134 | read_stats(); |
| 135 | } |
| 136 | |
| 137 | while ((iterations == -1) || (iterations-- > 0)) { |
| 138 | // Swap new and old cpu buffers; |
| 139 | tmp_total_cpu = old_total_cpu; |
| 140 | old_total_cpu = new_total_cpu; |
| 141 | new_total_cpu = tmp_total_cpu; |
| 142 | |
| 143 | tmp_cpus = old_cpus; |
| 144 | old_cpus = new_cpus; |
| 145 | new_cpus = tmp_cpus; |
| 146 | |
| 147 | sleep(delay); |
| 148 | read_stats(); |
| 149 | print_stats(); |
| 150 | } |
| 151 | |
| 152 | // Clean up |
| 153 | if (aggregate_freq_stats) { |
| 154 | free(new_total_cpu.freqs); |
| 155 | free(old_total_cpu.freqs); |
| 156 | } |
| 157 | for (i = 0; i < cpu_count; i++) { |
| 158 | free(new_cpus[i].freqs); |
| 159 | free(old_cpus[i].freqs); |
| 160 | } |
| 161 | free(new_cpus); |
| 162 | free(old_cpus); |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Get the number of CPUs of the system. |
| 169 | * |
| 170 | * Uses the two files /sys/devices/system/cpu/present and |
| 171 | * /sys/devices/system/cpu/online to determine the number of CPUs. Expects the |
| 172 | * format of both files to be either 0 or 0-N where N+1 is the number of CPUs. |
| 173 | * |
| 174 | * Exits if the present CPUs is not equal to the online CPUs |
| 175 | */ |
| 176 | static int get_cpu_count() { |
| 177 | int cpu_count = get_cpu_count_from_file("/sys/devices/system/cpu/present"); |
| 178 | if (cpu_count != get_cpu_count_from_file("/sys/devices/system/cpu/online")) { |
| 179 | die("present cpus != online cpus\n"); |
| 180 | } |
| 181 | return cpu_count; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Get the number of CPUs from a given filename. |
| 186 | */ |
| 187 | static int get_cpu_count_from_file(char *filename) { |
| 188 | FILE *file; |
| 189 | char line[MAX_BUF_SIZE]; |
| 190 | int cpu_count; |
| 191 | |
| 192 | file = fopen(filename, "r"); |
| 193 | if (!file) die("Could not open %s\n", filename); |
| 194 | if (!fgets(line, MAX_BUF_SIZE, file)) die("Could not get %s contents\n", filename); |
| 195 | fclose(file); |
| 196 | |
| 197 | if (strcmp(line, "0\n") == 0) { |
| 198 | return 1; |
| 199 | } |
| 200 | |
| 201 | if (1 == sscanf(line, "0-%d\n", &cpu_count)) { |
| 202 | return cpu_count + 1; |
| 203 | } |
| 204 | |
| 205 | die("Unexpected input in file %s (%s).\n", filename, line); |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Get the number of frequency states a given CPU can be scaled to. |
| 211 | */ |
| 212 | static int get_freq_scales_count(int cpu) { |
| 213 | FILE *file; |
| 214 | char filename[MAX_BUF_SIZE]; |
| 215 | long unsigned freq; |
| 216 | int count = 0; |
| 217 | |
| 218 | sprintf(filename, "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu); |
| 219 | file = fopen(filename, "r"); |
| 220 | if (!file) die("Could not open %s\n", filename); |
| 221 | do { |
| 222 | freq = 0; |
| 223 | fscanf(file, "%lu %*d\n", &freq); |
| 224 | if (freq) count++; |
| 225 | } while(freq); |
| 226 | fclose(file); |
| 227 | |
| 228 | return count; |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * Read the CPU and frequency stats for all cpus. |
| 233 | */ |
| 234 | static void read_stats() { |
| 235 | FILE *file; |
| 236 | char scanline[MAX_BUF_SIZE]; |
| 237 | int i; |
| 238 | |
| 239 | file = fopen("/proc/stat", "r"); |
| 240 | if (!file) die("Could not open /proc/stat.\n"); |
| 241 | fscanf(file, "cpu %lu %lu %lu %lu %lu %lu %lu %*d %*d %*d\n", |
| 242 | &new_total_cpu.utime, &new_total_cpu.ntime, &new_total_cpu.stime, &new_total_cpu.itime, |
| 243 | &new_total_cpu.iowtime, &new_total_cpu.irqtime, &new_total_cpu.sirqtime); |
| 244 | if (aggregate_freq_stats) { |
| 245 | for (i = 0; i < new_total_cpu.freq_count; i++) { |
| 246 | new_total_cpu.freqs[i].time = 0; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | for (i = 0; i < cpu_count; i++) { |
| 251 | sprintf(scanline, "cpu%d %%lu %%lu %%lu %%lu %%lu %%lu %%lu %%*d %%*d %%*d\n", i); |
| 252 | fscanf(file, scanline, &new_cpus[i].utime, &new_cpus[i].ntime, &new_cpus[i].stime, |
| 253 | &new_cpus[i].itime, &new_cpus[i].iowtime, &new_cpus[i].irqtime, |
| 254 | &new_cpus[i].sirqtime); |
| 255 | read_freq_stats(i); |
| 256 | } |
| 257 | fclose(file); |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * Read the frequency stats for a given cpu. |
| 262 | */ |
| 263 | static void read_freq_stats(int cpu) { |
| 264 | FILE *file; |
| 265 | char filename[MAX_BUF_SIZE]; |
| 266 | int i; |
| 267 | |
| 268 | sprintf(filename, "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu); |
| 269 | file = fopen(filename, "r"); |
| 270 | if (!file) die("Could not open %s\n", filename); |
| 271 | for (i = 0; i < new_cpus[cpu].freq_count; i++) { |
| 272 | fscanf(file, "%u %lu\n", &new_cpus[cpu].freqs[i].freq, |
| 273 | &new_cpus[cpu].freqs[i].time); |
| 274 | if (aggregate_freq_stats) { |
| 275 | new_total_cpu.freqs[i].freq = new_cpus[cpu].freqs[i].freq; |
| 276 | new_total_cpu.freqs[i].time += new_cpus[cpu].freqs[i].time; |
| 277 | } |
| 278 | } |
| 279 | fclose(file); |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * Get the sum of the cpu time from all categories. |
| 284 | */ |
| 285 | static long unsigned get_cpu_total_time(struct cpu_info *cpu) { |
| 286 | return (cpu->utime + cpu->ntime + cpu->stime + cpu->itime + cpu->iowtime + cpu->irqtime + |
| 287 | cpu->sirqtime); |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Print the stats for all CPUs. |
| 292 | */ |
| 293 | static void print_stats() { |
| 294 | char label[8]; |
| 295 | int i, j; |
| 296 | char print_freq; |
| 297 | |
| 298 | print_freq = should_print_freq_stats(); |
| 299 | |
| 300 | print_cpu_stats("Total", &new_total_cpu, &old_total_cpu, 1); |
| 301 | for (i = 0; i < cpu_count; i++) { |
| 302 | sprintf(label, "cpu%d", i); |
| 303 | print_cpu_stats(label, &new_cpus[i], &old_cpus[i], print_freq); |
| 304 | } |
| 305 | printf("\n"); |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * Print the stats for a single CPU. |
| 310 | */ |
| 311 | static void print_cpu_stats(char *label, struct cpu_info *new_cpu, struct cpu_info *old_cpu, |
| 312 | char print_freq) { |
| 313 | long int total_delta_time; |
| 314 | |
| 315 | if (!minimal) { |
| 316 | total_delta_time = get_cpu_total_time(new_cpu) - get_cpu_total_time(old_cpu); |
| 317 | printf("%s: User %ld + Nice %ld + Sys %ld + Idle %ld + IOW %ld + IRQ %ld + SIRQ %ld = " |
| 318 | "%ld\n", label, |
| 319 | new_cpu->utime - old_cpu->utime, |
| 320 | new_cpu->ntime - old_cpu->ntime, |
| 321 | new_cpu->stime - old_cpu->stime, |
| 322 | new_cpu->itime - old_cpu->itime, |
| 323 | new_cpu->iowtime - old_cpu->iowtime, |
| 324 | new_cpu->irqtime - old_cpu->irqtime, |
| 325 | new_cpu->sirqtime - old_cpu->sirqtime, |
| 326 | total_delta_time); |
| 327 | if (print_freq) { |
| 328 | print_freq_stats(new_cpu, old_cpu); |
| 329 | } |
| 330 | } else { |
| 331 | printf("%s,%ld,%ld,%ld,%ld,%ld,%ld,%ld", label, |
| 332 | new_cpu->utime - old_cpu->utime, |
| 333 | new_cpu->ntime - old_cpu->ntime, |
| 334 | new_cpu->stime - old_cpu->stime, |
| 335 | new_cpu->itime - old_cpu->itime, |
| 336 | new_cpu->iowtime - old_cpu->iowtime, |
| 337 | new_cpu->irqtime - old_cpu->irqtime, |
| 338 | new_cpu->sirqtime - old_cpu->sirqtime); |
| 339 | print_freq_stats(new_cpu, old_cpu); |
| 340 | printf("\n"); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * Print the CPU stats for a single CPU. |
| 346 | */ |
| 347 | static void print_freq_stats(struct cpu_info *new_cpu, struct cpu_info *old_cpu) { |
| 348 | long int delta_time, total_delta_time; |
| 349 | int i; |
| 350 | |
| 351 | if (new_cpu->freq_count > 0) { |
| 352 | if (!minimal) { |
| 353 | total_delta_time = 0; |
| 354 | printf(" "); |
| 355 | for (i = 0; i < new_cpu->freq_count; i++) { |
| 356 | delta_time = new_cpu->freqs[i].time - old_cpu->freqs[i].time; |
| 357 | total_delta_time += delta_time; |
| 358 | printf("%ukHz %ld", new_cpu->freqs[i].freq, delta_time); |
| 359 | if (i + 1 != new_cpu->freq_count) { |
| 360 | printf(" + \n "); |
| 361 | } else { |
| 362 | printf(" = "); |
| 363 | } |
| 364 | } |
| 365 | printf("%ld\n", total_delta_time); |
| 366 | } else { |
| 367 | for (i = 0; i < new_cpu->freq_count; i++) { |
| 368 | printf(",%u,%ld", new_cpu->freqs[i].freq, |
| 369 | new_cpu->freqs[i].time - old_cpu->freqs[i].time); |
| 370 | } |
| 371 | } |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Determine if frequency stats should be printed. |
| 377 | * |
| 378 | * If the frequency stats are different between CPUs, the stats should be |
| 379 | * printed for each CPU, else only the aggregate frequency stats should be |
| 380 | * printed. |
| 381 | */ |
| 382 | static char should_print_freq_stats() { |
| 383 | int i, j; |
| 384 | |
| 385 | for (i = 1; i < cpu_count; i++) { |
| 386 | for (j = 0; j < new_cpus[i].freq_count; j++) { |
| 387 | if (new_cpus[i].freqs[j].time - old_cpus[i].freqs[j].time != |
| 388 | new_cpus[0].freqs[j].time - old_cpus[0].freqs[j].time) { |
| 389 | return 1; |
| 390 | } |
| 391 | } |
| 392 | } |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * Determine if the frequency stats should be aggregated. |
| 398 | * |
| 399 | * Only aggregate the frequency stats in the total cpu stats if the frequencies |
| 400 | * reported by all CPUs are identical. Must be called after read_stats() has |
| 401 | * been called once. |
| 402 | */ |
| 403 | static char should_aggregate_freq_stats() { |
| 404 | int i, j; |
| 405 | |
| 406 | for (i = 1; i < cpu_count; i++) { |
| 407 | if (new_cpus[i].freq_count != new_cpus[0].freq_count) { |
| 408 | return 0; |
| 409 | } |
| 410 | for (j = 0; j < new_cpus[i].freq_count; j++) { |
| 411 | if (new_cpus[i].freqs[j].freq != new_cpus[0].freqs[j].freq) { |
| 412 | return 0; |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | return 1; |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Print the usage message. |
| 422 | */ |
| 423 | static void usage(char *cmd) { |
| 424 | fprintf(stderr, "Usage %s [ -n iterations ] [ -d delay ] [ -c cpu ] [ -m ] [ -h ]\n" |
| 425 | " -n num Updates to show before exiting.\n" |
| 426 | " -d num Seconds to wait between updates.\n" |
| 427 | " -m Display minimal output.\n" |
| 428 | " -h Display this help screen.\n", |
| 429 | cmd); |
| 430 | } |