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 (i < b_states)
 204                                 printf(_("    Pstate-Pb%d: %luMHz (boost state)"
 205                                          "\n"), i, pstates[i]);
 206                         else
 207                                 printf(_("    Pstate-P%d:  %luMHz\n"),
 208                                        i - b_states, pstates[i]);
 209                 }
 210         } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_HAS_TURBO_RATIO) {
 211                 double bclk;
 212                 unsigned long long intel_turbo_ratio = 0;
 213                 unsigned int ratio;
 214
 215                 /* Any way to autodetect this ? */
 216                 if (cpupower_cpu_info.caps & CPUPOWER_CAP_IS_SNB)
 217                         bclk = 100.00;
 218                 else
 219                         bclk = 133.33;
 220                 intel_turbo_ratio = msr_intel_get_turbo_ratio(cpu);
 221                 dprint ("    Ratio: 0x%llx - bclk: %f\n",
 222                         intel_turbo_ratio, bclk);
 223
 224                 ratio = (intel_turbo_ratio >> 24) & 0xFF;
 225                 if (ratio)
 226                         printf(_("    %.0f MHz max turbo 4 active cores\n"),
 227                                ratio * bclk);
 228
 229                 ratio = (intel_turbo_ratio >> 16) & 0xFF;
 230                 if (ratio)
 231                         printf(_("    %.0f MHz max turbo 3 active cores\n"),
 232                                ratio * bclk);
 233
 234                 ratio = (intel_turbo_ratio >> 8) & 0xFF;
 235                 if (ratio)
 236                         printf(_("    %.0f MHz max turbo 2 active cores\n"),
 237                                ratio * bclk);
 238
 239                 ratio = (intel_turbo_ratio >> 0) & 0xFF;
 240                 if (ratio)
 241                         printf(_("    %.0f MHz max turbo 1 active cores\n"),
 242                                ratio * bclk);
 243         }
 244         return 0;
 245 }
 246
 247 /* --freq / -f */
 248
 249 static int get_freq_kernel(unsigned int cpu, unsigned int human)
 250 {
 251         unsigned long freq = cpufreq_get_freq_kernel(cpu);
 252         printf(_("  current CPU frequency: "));
 253         if (!freq) {
 254                 printf(_(" Unable to call to kernel\n"));
 255                 return -EINVAL;
 256         }
 257         if (human) {
 258                 print_speed(freq);
 259         } else
 260                 printf("%lu", freq);
 261         printf(_(" (asserted by call to kernel)\n"));
 262         return 0;
 263 }
 264
 265
 266 /* --hwfreq / -w */
 267
 268 static int get_freq_hardware(unsigned int cpu, unsigned int human)
 269 {
 270         unsigned long freq = cpufreq_get_freq_hardware(cpu);
 271         printf(_("  current CPU frequency: "));
 272         if (!freq) {
 273                 printf("Unable to call hardware\n");
 274                 return -EINVAL;
 275         }
 276         if (human) {
 277                 print_speed(freq);
 278         } else
 279                 printf("%lu", freq);
 280         printf(_(" (asserted by call to hardware)\n"));
 281         return 0;
 282 }
 283
 284 /* --hwlimits / -l */
 285
 286 static int get_hardware_limits(unsigned int cpu, unsigned int human)
 287 {
 288         unsigned long min, max;
 289
 290         if (cpufreq_get_hardware_limits(cpu, &min, &max)) {
 291                 printf(_("Not Available\n"));
 292                 return -EINVAL;
 293         }
 294
 295         if (human) {
 296                 printf(_("  hardware limits: "));
 297                 print_speed(min);
 298                 printf(" - ");
 299                 print_speed(max);
 300                 printf("\n");
 301         } else {
 302                 printf("%lu %lu\n", min, max);
 303         }
 304         return 0;
 305 }
 306
 307 /* --driver / -d */
 308
 309 static int get_driver(unsigned int cpu)
 310 {
 311         char *driver = cpufreq_get_driver(cpu);
 312         if (!driver) {
 313                 printf(_("  no or unknown cpufreq driver is active on this CPU\n"));
 314                 return -EINVAL;
 315         }
 316         printf("  driver: %s\n", driver);
 317         cpufreq_put_driver(driver);
 318         return 0;
 319 }
 320
 321 /* --policy / -p */
 322
 323 static int get_policy(unsigned int cpu)
 324 {
 325         struct cpufreq_policy *policy = cpufreq_get_policy(cpu);
 326         if (!policy) {
 327                 printf(_("  Unable to determine current policy\n"));
 328                 return -EINVAL;
 329         }
 330         printf(_("  current policy: frequency should be within "));
 331         print_speed(policy->min);
 332         printf(_(" and "));
 333         print_speed(policy->max);
 334
 335         printf(".\n                  ");
 336         printf(_("The governor \"%s\" may decide which speed to use\n"
 337                "                  within this range.\n"),
 338                policy->governor);
 339         cpufreq_put_policy(policy);
 340         return 0;
 341 }
 342
 343 /* --governors / -g */
 344
 345 static int get_available_governors(unsigned int cpu)
 346 {
 347         struct cpufreq_available_governors *governors =
 348                 cpufreq_get_available_governors(cpu);
 349
 350         printf(_("  available cpufreq governors: "));
 351         if (!governors) {
 352                 printf(_("Not Available\n"));
 353                 return -EINVAL;
 354         }
 355
 356         while (governors->next) {
 357                 printf("%s ", governors->governor);
 358                 governors = governors->next;
 359         }
 360         printf("%s\n", governors->governor);
 361         cpufreq_put_available_governors(governors);
 362         return 0;
 363 }
 364
 365
 366 /* --affected-cpus  / -a */
 367
 368 static int get_affected_cpus(unsigned int cpu)
 369 {
 370         struct cpufreq_affected_cpus *cpus = cpufreq_get_affected_cpus(cpu);
 371
 372         printf(_("  CPUs which need to have their frequency coordinated by software: "));
 373         if (!cpus) {
 374                 printf(_("Not Available\n"));
 375                 return -EINVAL;
 376         }
 377
 378         while (cpus->next) {
 379                 printf("%d ", cpus->cpu);
 380                 cpus = cpus->next;
 381         }
 382         printf("%d\n", cpus->cpu);
 383         cpufreq_put_affected_cpus(cpus);
 384         return 0;
 385 }
 386
 387 /* --related-cpus  / -r */
 388
 389 static int get_related_cpus(unsigned int cpu)
 390 {
 391         struct cpufreq_affected_cpus *cpus = cpufreq_get_related_cpus(cpu);
 392
 393         printf(_("  CPUs which run at the same hardware frequency: "));
 394         if (!cpus) {
 395                 printf(_("Not Available\n"));
 396                 return -EINVAL;
 397         }
 398
 399         while (cpus->next) {
 400                 printf("%d ", cpus->cpu);
 401                 cpus = cpus->next;
 402         }
 403         printf("%d\n", cpus->cpu);
 404         cpufreq_put_related_cpus(cpus);
 405         return 0;
 406 }
 407
 408 /* --stats / -s */
 409
 410 static int get_freq_stats(unsigned int cpu, unsigned int human)
 411 {
 412         unsigned long total_trans = cpufreq_get_transitions(cpu);
 413         unsigned long long total_time;
 414         struct cpufreq_stats *stats = cpufreq_get_stats(cpu, &total_time);
 415         while (stats) {
 416                 if (human) {
 417                         print_speed(stats->frequency);
 418                         printf(":%.2f%%",
 419                                 (100.0 * stats->time_in_state) / total_time);
 420                 } else
 421                         printf("%lu:%llu",
 422                                 stats->frequency, stats->time_in_state);
 423                 stats = stats->next;
 424                 if (stats)
 425                         printf(", ");
 426         }
 427         cpufreq_put_stats(stats);
 428         if (total_trans)
 429                 printf("  (%lu)\n", total_trans);
 430         return 0;
 431 }
 432
 433 /* --latency / -y */
 434
 435 static int get_latency(unsigned int cpu, unsigned int human)
 436 {
 437         unsigned long latency = cpufreq_get_transition_latency(cpu);
 438
 439         printf(_("  maximum transition latency: "));
 440         if (!latency || latency == UINT_MAX) {
 441                 printf(_(" Cannot determine or is not supported.\n"));
 442                 return -EINVAL;
 443         }
 444
 445         if (human) {
 446                 print_duration(latency);
 447                 printf("\n");
 448         } else
 449                 printf("%lu\n", latency);
 450         return 0;
 451 }
 452
 453 static void debug_output_one(unsigned int cpu)
 454 {
 455         struct cpufreq_available_frequencies *freqs;
 456
 457         get_driver(cpu);
 458         get_related_cpus(cpu);
 459         get_affected_cpus(cpu);
 460         get_latency(cpu, 1);
 461         get_hardware_limits(cpu, 1);
 462
 463         freqs = cpufreq_get_available_frequencies(cpu);
 464         if (freqs) {
 465                 printf(_("  available frequency steps:  "));
 466                 while (freqs->next) {
 467                         print_speed(freqs->frequency);
 468                         printf(", ");
 469                         freqs = freqs->next;
 470                 }
 471                 print_speed(freqs->frequency);
 472                 printf("\n");
 473                 cpufreq_put_available_frequencies(freqs);
 474         }
 475
 476         get_available_governors(cpu);
 477         get_policy(cpu);
 478         if (get_freq_hardware(cpu, 1) < 0)
 479                 get_freq_kernel(cpu, 1);
 480         get_boost_mode(cpu);
 481 }
 482
 483 static struct option info_opts[] = {
 484         {"debug",        no_argument,            NULL,   'e'},
 485         {"boost",        no_argument,            NULL,   'b'},
 486         {"freq",         no_argument,            NULL,   'f'},
 487         {"hwfreq",       no_argument,            NULL,   'w'},
 488         {"hwlimits",     no_argument,            NULL,   'l'},
 489         {"driver",       no_argument,            NULL,   'd'},
 490         {"policy",       no_argument,            NULL,   'p'},
 491         {"governors",    no_argument,            NULL,   'g'},
 492         {"related-cpus",  no_argument,   NULL,   'r'},
 493         {"affected-cpus", no_argument,   NULL,   'a'},
 494         {"stats",        no_argument,            NULL,   's'},
 495         {"latency",      no_argument,            NULL,   'y'},
 496         {"proc",         no_argument,            NULL,   'o'},
 497         {"human",        no_argument,            NULL,   'm'},
 498         {"no-rounding", no_argument,     NULL,   'n'},
 499         { },
 500 };
 501
 502 int cmd_freq_info(int argc, char **argv)
 503 {
 504         extern char *optarg;
 505         extern int optind, opterr, optopt;
 506         int ret = 0, cont = 1;
 507         unsigned int cpu = 0;
 508         unsigned int human = 0;
 509         int output_param = 0;
 510
 511         do {
 512                 ret = getopt_long(argc, argv, "oefwldpgrasmybn", info_opts,
 513                                   NULL);
 514                 switch (ret) {
 515                 case '?':
 516                         output_param = '?';
 517                         cont = 0;
 518                         break;
 519                 case -1:
 520                         cont = 0;
 521                         break;
 522                 case 'b':
 523                 case 'o':
 524                 case 'a':
 525                 case 'r':
 526                 case 'g':
 527                 case 'p':
 528                 case 'd':
 529                 case 'l':
 530                 case 'w':
 531                 case 'f':
 532                 case 'e':
 533                 case 's':
 534                 case 'y':
 535                         if (output_param) {
 536                                 output_param = -1;
 537                                 cont = 0;
 538                                 break;
 539                         }
 540                         output_param = ret;
 541                         break;
 542                 case 'm':
 543                         if (human) {
 544                                 output_param = -1;
 545                                 cont = 0;
 546                                 break;
 547                         }
 548                         human = 1;
 549                         break;
 550                 case 'n':
 551                         no_rounding = 1;
 552                         break;
 553                 default:
 554                         fprintf(stderr, "invalid or unknown argument\n");
 555                         return EXIT_FAILURE;
 556                 }
 557         } while (cont);
 558
 559         switch (output_param) {
 560         case 'o':
 561                 if (!bitmask_isallclear(cpus_chosen)) {
 562                         printf(_("The argument passed to this tool can't be "
 563                                  "combined with passing a --cpu argument\n"));
 564                         return -EINVAL;
 565                 }
 566                 break;
 567         case 0:
 568                 output_param = 'e';
 569         }
 570
 571         ret = 0;
 572
 573         /* Default is: show output of CPU 0 only */
 574         if (bitmask_isallclear(cpus_chosen))
 575                 bitmask_setbit(cpus_chosen, 0);
 576
 577         switch (output_param) {
 578         case -1:
 579                 printf(_("You can't specify more than one --cpu parameter and/or\n"
 580                        "more than one output-specific argument\n"));
 581                 return -EINVAL;
 582         case '?':
 583                 printf(_("invalid or unknown argument\n"));
 584                 return -EINVAL;
 585         case 'o':
 586                 proc_cpufreq_output();
 587                 return EXIT_SUCCESS;
 588         }
 589
 590         for (cpu = bitmask_first(cpus_chosen);
 591              cpu <= bitmask_last(cpus_chosen); cpu++) {
 592
 593                 if (!bitmask_isbitset(cpus_chosen, cpu))
 594                         continue;
 595
 596                 printf(_("analyzing CPU %d:\n"), cpu);
 597
 598                 if (sysfs_is_cpu_online(cpu) != 1) {
 599                         printf(_(" *is offline\n"));
 600                         printf("\n");
 601                         continue;
 602                 }
 603
 604                 switch (output_param) {
 605                 case 'b':
 606                         get_boost_mode(cpu);
 607                         break;
 608                 case 'e':
 609                         debug_output_one(cpu);
 610                         break;
 611                 case 'a':
 612                         ret = get_affected_cpus(cpu);
 613                         break;
 614                 case 'r':
 615                         ret = get_related_cpus(cpu);
 616                         break;
 617                 case 'g':
 618                         ret = get_available_governors(cpu);
 619                         break;
 620                 case 'p':
 621                         ret = get_policy(cpu);
 622                         break;
 623                 case 'd':
 624                         ret = get_driver(cpu);
 625                         break;
 626                 case 'l':
 627                         ret = get_hardware_limits(cpu, human);
 628                         break;
 629                 case 'w':
 630                         ret = get_freq_hardware(cpu, human);
 631                         break;
 632                 case 'f':
 633                         ret = get_freq_kernel(cpu, human);
 634                         break;
 635                 case 's':
 636                         ret = get_freq_stats(cpu, human);
 637                         break;
 638                 case 'y':
 639                         ret = get_latency(cpu, human);
 640                         break;
 641                 }
 642                 if (ret)
 643                         return ret;
 644         }
 645         return ret;
 646 }