tools/power/cpupower/utils/cpufreq-info.c

   1 /*
   2  *  (C) 2004-2009  Dominik Brodowski <linux@dominikbrodowski.de>
   3  *
   4  *  Licensed under the terms of the GNU GPL License version 2.
   5  */
   6
   7
   8 #include <unistd.h>
   9 #include <stdio.h>
  10 #include <errno.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <limits.h>
  14
  15 #include <getopt.h>
  16
  17 #include "cpufreq.h"
  18 #include "helpers/sysfs.h"
  19 #include "helpers/helpers.h"
  20 #include "helpers/bitmask.h"
  21
  22 #define LINE_LEN 10
  23
  24 static unsigned int count_cpus(void)
  25 {
  26         FILE *fp;
  27         char value[LINE_LEN];
  28         unsigned int ret = 0;
  29         unsigned int cpunr = 0;
  30
  31         fp = fopen("/proc/stat", "r");
  32         if (!fp) {
  33                 printf(_("Couldn't count the number of CPUs (%s: %s), assuming 1\n"), "/proc/stat", strerror(errno));
  34                 return 1;
  35         }
  36
  37         while (!feof(fp)) {
  38                 if (!fgets(value, LINE_LEN, fp))
  39                         continue;
  40                 value[LINE_LEN - 1] = '\0';
  41                 if (strlen(value) < (LINE_LEN - 2))
  42                         continue;
  43                 if (strstr(value, "cpu "))
  44                         continue;
  45                 if (sscanf(value, "cpu%d ", &cpunr) != 1)
  46                         continue;
  47                 if (cpunr > ret)
  48                         ret = cpunr;
  49         }
  50         fclose(fp);
  51
  52         /* cpu count starts from 0, on error return 1 (UP) */
  53         return ret + 1;
  54 }
  55
  56
  57 static void proc_cpufreq_output(void)
  58 {
  59         unsigned int cpu, nr_cpus;
  60         struct cpufreq_policy *policy;
  61         unsigned int min_pctg = 0;
  62         unsigned int max_pctg = 0;
  63         unsigned long min, max;
  64
  65         printf(_("          minimum CPU frequency  -  maximum CPU frequency  -  governor\n"));
  66
  67         nr_cpus = count_cpus();
  68         for (cpu = 0; cpu < nr_cpus; cpu++) {
  69                 policy = cpufreq_get_policy(cpu);
  70                 if (!policy)
  71                         continue;
  72
  73                 if (cpufreq_get_hardware_limits(cpu, &min, &max)) {
  74                         max = 0;
  75                 } else {
  76                         min_pctg = (policy->min * 100) / max;
  77                         max_pctg = (policy->max * 100) / max;
  78                 }
  79                 printf("CPU%3d    %9lu kHz (%3d %%)  -  %9lu kHz (%3d %%)  -  %s\n",
  80                         cpu , policy->min, max ? min_pctg : 0, policy->max,
  81                         max ? max_pctg : 0, policy->governor);
  82
  83                 cpufreq_put_policy(policy);
  84         }
  85 }
  86
  87 static int no_rounding;
  88 static void print_speed(unsigned long speed)
  89 {
  90         unsigned long tmp;
  91
  92         if (no_rounding) {
  93                 if (speed > 1000000)
  94                         printf("%u.%06u GHz", ((unsigned int) speed/1000000),
  95                                 ((unsigned int) speed%1000000));
  96                 else if (speed > 1000)
  97                         printf("%u.%03u MHz", ((unsigned int) speed/1000),
  98                                 (unsigned int) (speed%1000));
  99                 else
 100                         printf("%lu kHz", speed);
 101         } else {
 102                 if (speed > 1000000) {
 103                         tmp = speed%10000;
 104                         if (tmp >= 5000)
 105                                 speed += 10000;
 106                         printf("%u.%02u GHz", ((unsigned int) speed/1000000),
 107                                 ((unsigned int) (speed%1000000)/10000));
 108                 } else if (speed > 100000) {
 109                         tmp = speed%1000;
 110                         if (tmp >= 500)
 111                                 speed += 1000;
 112                         printf("%u MHz", ((unsigned int) speed/1000));
 113                 } else if (speed > 1000) {
 114                         tmp = speed%100;
 115                         if (tmp >= 50)
 116                                 speed += 100;
 117                         printf("%u.%01u MHz", ((unsigned int) speed/1000),
 118                                 ((unsigned int) (speed%1000)/100));
 119                 }
 120         }
 121
 122         return;
 123 }
 124
 125 static void print_duration(unsigned long duration)
 126 {
 127         unsigned long tmp;
 128
 129         if (no_rounding) {
 130                 if (duration > 1000000)
 131                         printf("%u.%06u ms", ((unsigned int) duration/1000000),
 132                                 ((unsigned int) duration%1000000));
 133                 else if (duration > 100000)
 134                         printf("%u us", ((unsigned int) duration/1000));
 135                 else if (duration > 1000)
 136                         printf("%u.%03u us", ((unsigned int) duration/1000),
 137                                 ((unsigned int) duration%1000));
 138                 else
 139                         printf("%lu ns", duration);
 140         } else {
 141                 if (duration > 1000000) {
 142                         tmp = duration%10000;
 143                         if (tmp >= 5000)
 144                                 duration += 10000;
 145                         printf("%u.%02u ms", ((unsigned int) duration/1000000),
 146                                 ((unsigned int) (duration%1000000)/10000));
 147                 } else if (duration > 100000) {
 148                         tmp = duration%1000;
 149                         if (tmp >= 500)
 150                                 duration += 1000;
 151                         printf("%u us", ((unsigned int) duration / 1000));
 152                 } else if (duration > 1000) {
 153                         tmp = duration%100;
 154                         if (tmp >= 50)
 155                                 duration += 100;
 156                         printf("%u.%01u us", ((unsigned int) duration/1000),
 157                                 ((unsigned int) (duration%1000)/100));
 158                 } else
 159                         printf("%lu ns", duration);
 160         }
 161         return;
 162 }
 163
 164 /* --boost / -b */
 165
 166 static int get_boost_mode(unsigned int cpu)
 167 {
 168         int support, active, b_states = 0, ret, pstate_no, i;
 169         /* ToDo: Make this more global */
 170         unsigned long pstates[MAX_HW_PSTATES] = {0,};
 171
 172         if (cpupower_cpu_info.vendor != X86_VENDOR_AMD &&
 173             cpupower_cpu_info.vendor != X86_VENDOR_INTEL)
 174                 return 0;
 175
 176         ret = cpufreq_has_boost_support(cpu, &support, &active, &b_states);
 177         if (ret) {
 178                 printf(_("Error while evaluating Boost Capabilities"
 179                                 " on CPU %d -- are you root?\n"), cpu);
 180                 return ret;
 181         }
 182         /* P state changes via MSR are identified via cpuid 80000007
 183            on Intel and AMD, but we assume boost capable machines can do that
 184            if (cpuid_eax(0x80000000) >= 0x80000007
 185            && (cpuid_edx(0x80000007) & (1 << 7)))
 186         */
 187
 188         printf(_("  boost state support:\n"));
 189
 190         printf(_("    Supported: %s\n"), support ? _("yes") : _("no"));
 191         printf(_("    Active: %s\n"), active ? _("yes") : _("no"));
 192
 193         if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
 194             cpupower_cpu_info.family >= 0x10) {
 195                 ret = decode_pstates(cpu, cpupower_cpu_info.family, b_states,
 196                                      pstates, &pstate_no);
 197                 if (ret)
 198                         return ret;
 199
 200                 printf(_("    Boost States: %d\n"), b_states);
 201                 printf(_("    Total States: %d\n"), pstate_no);
 202                 for (i = 0; i < pstate_no; i++) {
 203                         if (!pstates[i])
 204                                 continue;
 205                         if (i < b_states)
 206                                 printf(_("    Pstate-Pb%d: %luMHz (boost state)"
 207                                          "\n"), i, pstates[i]);
 208                         else
 209                                 printf(_("    Pstate-P%d:  %luMHz\n"),
 210                                        i - b_states, pstates[i]);
 211                 }
 212         } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_HAS_TURBO_RATIO) {
 213                 double bclk;
 214                 unsigned long long intel_turbo_ratio = 0;
 215                 unsigned int ratio;
 216
 217                 /* Any way to autodetect this ? */
 218                 if (cpupower_cpu_info.caps & CPUPOWER_CAP_IS_SNB)
 219                         bclk = 100.00;
 220                 else
 221                         bclk = 133.33;
 222                 intel_turbo_ratio = msr_intel_get_turbo_ratio(cpu);
 223                 dprint ("    Ratio: 0x%llx - bclk: %f\n",
 224                         intel_turbo_ratio, bclk);
 225
 226                 ratio = (intel_turbo_ratio >> 24) & 0xFF;
 227                 if (ratio)
 228                         printf(_("    %.0f MHz max turbo 4 active cores\n"),
 229                                ratio * bclk);
 230
 231                 ratio = (intel_turbo_ratio >> 16) & 0xFF;
 232                 if (ratio)
 233                         printf(_("    %.0f MHz max turbo 3 active cores\n"),
 234                                ratio * bclk);
 235
 236                 ratio = (intel_turbo_ratio >> 8) & 0xFF;
 237                 if (ratio)
 238                         printf(_("    %.0f MHz max turbo 2 active cores\n"),
 239                                ratio * bclk);
 240
 241                 ratio = (intel_turbo_ratio >> 0) & 0xFF;
 242                 if (ratio)
 243                         printf(_("    %.0f MHz max turbo 1 active cores\n"),
 244                                ratio * bclk);
 245         }
 246         return 0;
 247 }
 248
 249 /* --freq / -f */
 250
 251 static int get_freq_kernel(unsigned int cpu, unsigned int human)
 252 {
 253         unsigned long freq = cpufreq_get_freq_kernel(cpu);
 254         printf(_("  current CPU frequency: "));
 255         if (!freq) {
 256                 printf(_(" Unable to call to kernel\n"));
 257                 return -EINVAL;
 258         }
 259         if (human) {
 260                 print_speed(freq);
 261         } else
 262                 printf("%lu", freq);
 263         printf(_(" (asserted by call to kernel)\n"));
 264         return 0;
 265 }
 266
 267
 268 /* --hwfreq / -w */
 269
 270 static int get_freq_hardware(unsigned int cpu, unsigned int human)
 271 {
 272         unsigned long freq = cpufreq_get_freq_hardware(cpu);
 273         printf(_("  current CPU frequency: "));
 274         if (!freq) {
 275                 printf("Unable to call hardware\n");
 276                 return -EINVAL;
 277         }
 278         if (human) {
 279                 print_speed(freq);
 280         } else
 281                 printf("%lu", freq);
 282         printf(_(" (asserted by call to hardware)\n"));
 283         return 0;
 284 }
 285
 286 /* --hwlimits / -l */
 287
 288 static int get_hardware_limits(unsigned int cpu, unsigned int human)
 289 {
 290         unsigned long min, max;
 291
 292         if (cpufreq_get_hardware_limits(cpu, &min, &max)) {
 293                 printf(_("Not Available\n"));
 294                 return -EINVAL;
 295         }
 296
 297         if (human) {
 298                 printf(_("  hardware limits: "));
 299                 print_speed(min);
 300                 printf(" - ");
 301                 print_speed(max);
 302                 printf("\n");
 303         } else {
 304                 printf("%lu %lu\n", min, max);
 305         }
 306         return 0;
 307 }
 308
 309 /* --driver / -d */
 310
 311 static int get_driver(unsigned int cpu)
 312 {
 313         char *driver = cpufreq_get_driver(cpu);
 314         if (!driver) {
 315                 printf(_("  no or unknown cpufreq driver is active on this CPU\n"));
 316                 return -EINVAL;
 317         }
 318         printf("  driver: %s\n", driver);
 319         cpufreq_put_driver(driver);
 320         return 0;
 321 }
 322
 323 /* --policy / -p */
 324
 325 static int get_policy(unsigned int cpu)
 326 {
 327         struct cpufreq_policy *policy = cpufreq_get_policy(cpu);
 328         if (!policy) {
 329                 printf(_("  Unable to determine current policy\n"));
 330                 return -EINVAL;
 331         }
 332         printf(_("  current policy: frequency should be within "));
 333         print_speed(policy->min);
 334         printf(_(" and "));
 335         print_speed(policy->max);
 336
 337         printf(".\n                  ");
 338         printf(_("The governor \"%s\" may decide which speed to use\n"
 339                "                  within this range.\n"),
 340                policy->governor);
 341         cpufreq_put_policy(policy);
 342         return 0;
 343 }
 344
 345 /* --governors / -g */
 346
 347 static int get_available_governors(unsigned int cpu)
 348 {
 349         struct cpufreq_available_governors *governors =
 350                 cpufreq_get_available_governors(cpu);
 351
 352         printf(_("  available cpufreq governors: "));
 353         if (!governors) {
 354                 printf(_("Not Available\n"));
 355                 return -EINVAL;
 356         }
 357
 358         while (governors->next) {
 359                 printf("%s ", governors->governor);
 360                 governors = governors->next;
 361         }
 362         printf("%s\n", governors->governor);
 363         cpufreq_put_available_governors(governors);
 364         return 0;
 365 }
 366
 367
 368 /* --affected-cpus  / -a */
 369
 370 static int get_affected_cpus(unsigned int cpu)
 371 {
 372         struct cpufreq_affected_cpus *cpus = cpufreq_get_affected_cpus(cpu);
 373
 374         printf(_("  CPUs which need to have their frequency coordinated by software: "));
 375         if (!cpus) {
 376                 printf(_("Not Available\n"));
 377                 return -EINVAL;
 378         }
 379
 380         while (cpus->next) {
 381                 printf("%d ", cpus->cpu);
 382                 cpus = cpus->next;
 383         }
 384         printf("%d\n", cpus->cpu);
 385         cpufreq_put_affected_cpus(cpus);
 386         return 0;
 387 }
 388
 389 /* --related-cpus  / -r */
 390
 391 static int get_related_cpus(unsigned int cpu)
 392 {
 393         struct cpufreq_affected_cpus *cpus = cpufreq_get_related_cpus(cpu);
 394
 395         printf(_("  CPUs which run at the same hardware frequency: "));
 396         if (!cpus) {
 397                 printf(_("Not Available\n"));
 398                 return -EINVAL;
 399         }
 400
 401         while (cpus->next) {
 402                 printf("%d ", cpus->cpu);
 403                 cpus = cpus->next;
 404         }
 405         printf("%d\n", cpus->cpu);
 406         cpufreq_put_related_cpus(cpus);
 407         return 0;
 408 }
 409
 410 /* --stats / -s */
 411
 412 static int get_freq_stats(unsigned int cpu, unsigned int human)
 413 {
 414         unsigned long total_trans = cpufreq_get_transitions(cpu);
 415         unsigned long long total_time;
 416         struct cpufreq_stats *stats = cpufreq_get_stats(cpu, &total_time);
 417         while (stats) {
 418                 if (human) {
 419                         print_speed(stats->frequency);
 420                         printf(":%.2f%%",
 421                                 (100.0 * stats->time_in_state) / total_time);
 422                 } else
 423                         printf("%lu:%llu",
 424                                 stats->frequency, stats->time_in_state);
 425                 stats = stats->next;
 426                 if (stats)
 427                         printf(", ");
 428         }
 429         cpufreq_put_stats(stats);
 430         if (total_trans)
 431                 printf("  (%lu)\n", total_trans);
 432         return 0;
 433 }
 434
 435 /* --latency / -y */
 436
 437 static int get_latency(unsigned int cpu, unsigned int human)
 438 {
 439         unsigned long latency = cpufreq_get_transition_latency(cpu);
 440
 441         printf(_("  maximum transition latency: "));
 442         if (!latency || latency == UINT_MAX) {
 443                 printf(_(" Cannot determine or is not supported.\n"));
 444                 return -EINVAL;
 445         }
 446
 447         if (human) {
 448                 print_duration(latency);
 449                 printf("\n");
 450         } else
 451                 printf("%lu\n", latency);
 452         return 0;
 453 }
 454
 455 static void debug_output_one(unsigned int cpu)
 456 {
 457         struct cpufreq_available_frequencies *freqs;
 458
 459         get_driver(cpu);
 460         get_related_cpus(cpu);
 461         get_affected_cpus(cpu);
 462         get_latency(cpu, 1);
 463         get_hardware_limits(cpu, 1);
 464
 465         freqs = cpufreq_get_available_frequencies(cpu);
 466         if (freqs) {
 467                 printf(_("  available frequency steps:  "));
 468                 while (freqs->next) {
 469                         print_speed(freqs->frequency);
 470                         printf(", ");
 471                         freqs = freqs->next;
 472                 }
 473                 print_speed(freqs->frequency);
 474                 printf("\n");
 475                 cpufreq_put_available_frequencies(freqs);
 476         }
 477
 478         get_available_governors(cpu);
 479         get_policy(cpu);
 480         if (get_freq_hardware(cpu, 1) < 0)
 481                 get_freq_kernel(cpu, 1);
 482         get_boost_mode(cpu);
 483 }
 484
 485 static struct option info_opts[] = {
 486         {"debug",        no_argument,            NULL,   'e'},
 487         {"boost",        no_argument,            NULL,   'b'},
 488         {"freq",         no_argument,            NULL,   'f'},
 489         {"hwfreq",       no_argument,            NULL,   'w'},
 490         {"hwlimits",     no_argument,            NULL,   'l'},
 491         {"driver",       no_argument,            NULL,   'd'},
 492         {"policy",       no_argument,            NULL,   'p'},
 493         {"governors",    no_argument,            NULL,   'g'},
 494         {"related-cpus",  no_argument,   NULL,   'r'},
 495         {"affected-cpus", no_argument,   NULL,   'a'},
 496         {"stats",        no_argument,            NULL,   's'},
 497         {"latency",      no_argument,            NULL,   'y'},
 498         {"proc",         no_argument,            NULL,   'o'},
 499         {"human",        no_argument,            NULL,   'm'},
 500         {"no-rounding", no_argument,     NULL,   'n'},
 501         { },
 502 };
 503
 504 int cmd_freq_info(int argc, char **argv)
 505 {
 506         extern char *optarg;
 507         extern int optind, opterr, optopt;
 508         int ret = 0, cont = 1;
 509         unsigned int cpu = 0;
 510         unsigned int human = 0;
 511         int output_param = 0;
 512
 513         do {
 514                 ret = getopt_long(argc, argv, "oefwldpgrasmybn", info_opts,
 515                                   NULL);
 516                 switch (ret) {
 517                 case '?':
 518                         output_param = '?';
 519                         cont = 0;
 520                         break;
 521                 case -1:
 522                         cont = 0;
 523                         break;
 524                 case 'b':
 525                 case 'o':
 526                 case 'a':
 527                 case 'r':
 528                 case 'g':
 529                 case 'p':
 530                 case 'd':
 531                 case 'l':
 532                 case 'w':
 533                 case 'f':
 534                 case 'e':
 535                 case 's':
 536                 case 'y':
 537                         if (output_param) {
 538                                 output_param = -1;
 539                                 cont = 0;
 540                                 break;
 541                         }
 542                         output_param = ret;
 543                         break;
 544                 case 'm':
 545                         if (human) {
 546                                 output_param = -1;
 547                                 cont = 0;
 548                                 break;
 549                         }
 550                         human = 1;
 551                         break;
 552                 case 'n':
 553                         no_rounding = 1;
 554                         break;
 555                 default:
 556                         fprintf(stderr, "invalid or unknown argument\n");
 557                         return EXIT_FAILURE;
 558                 }
 559         } while (cont);
 560
 561         switch (output_param) {
 562         case 'o':
 563                 if (!bitmask_isallclear(cpus_chosen)) {
 564                         printf(_("The argument passed to this tool can't be "
 565                                  "combined with passing a --cpu argument\n"));
 566                         return -EINVAL;
 567                 }
 568                 break;
 569         case 0:
 570                 output_param = 'e';
 571         }
 572
 573         ret = 0;
 574
 575         /* Default is: show output of CPU 0 only */
 576         if (bitmask_isallclear(cpus_chosen))
 577                 bitmask_setbit(cpus_chosen, 0);
 578
 579         switch (output_param) {
 580         case -1:
 581                 printf(_("You can't specify more than one --cpu parameter and/or\n"
 582                        "more than one output-specific argument\n"));
 583                 return -EINVAL;
 584         case '?':
 585                 printf(_("invalid or unknown argument\n"));
 586                 return -EINVAL;
 587         case 'o':
 588                 proc_cpufreq_output();
 589                 return EXIT_SUCCESS;
 590         }
 591
 592         for (cpu = bitmask_first(cpus_chosen);
 593              cpu <= bitmask_last(cpus_chosen); cpu++) {
 594
 595                 if (!bitmask_isbitset(cpus_chosen, cpu))
 596                         continue;
 597
 598                 printf(_("analyzing CPU %d:\n"), cpu);
 599
 600                 if (sysfs_is_cpu_online(cpu) != 1) {
 601                         printf(_(" *is offline\n"));
 602                         printf("\n");
 603                         continue;
 604                 }
 605
 606                 switch (output_param) {
 607                 case 'b':
 608                         get_boost_mode(cpu);
 609                         break;
 610                 case 'e':
 611                         debug_output_one(cpu);
 612                         break;
 613                 case 'a':
 614                         ret = get_affected_cpus(cpu);
 615                         break;
 616                 case 'r':
 617                         ret = get_related_cpus(cpu);
 618                         break;
 619                 case 'g':
 620                         ret = get_available_governors(cpu);
 621                         break;
 622                 case 'p':
 623                         ret = get_policy(cpu);
 624                         break;
 625                 case 'd':
 626                         ret = get_driver(cpu);
 627                         break;
 628                 case 'l':
 629                         ret = get_hardware_limits(cpu, human);
 630                         break;
 631                 case 'w':
 632                         ret = get_freq_hardware(cpu, human);
 633                         break;
 634                 case 'f':
 635                         ret = get_freq_kernel(cpu, human);
 636                         break;
 637                 case 's':
 638                         ret = get_freq_stats(cpu, human);
 639                         break;
 640                 case 'y':
 641                         ret = get_latency(cpu, human);
 642                         break;
 643                 }
 644                 if (ret)
 645                         return ret;
 646         }
 647         return ret;
 648 }