tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
   4  *
   5  *  Output format inspired by Len Brown's <lenb@kernel.org> turbostat tool.
   6  */
   7
   8
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #include <signal.h>
  15 #include <sys/types.h>
  16 #include <sys/wait.h>
  17 #include <libgen.h>
  18
  19 #include "idle_monitor/cpupower-monitor.h"
  20 #include "idle_monitor/idle_monitors.h"
  21 #include "helpers/helpers.h"
  22
  23 /* Define pointers to all monitors.  */
  24 #define DEF(x) & x ## _monitor ,
  25 struct cpuidle_monitor *all_monitors[] = {
  26 #include "idle_monitors.def"
  27 0
  28 };
  29
  30 int cpu_count;
  31
  32 static struct cpuidle_monitor *monitors[MONITORS_MAX];
  33 static unsigned int avail_monitors;
  34
  35 static char *progname;
  36
  37 enum operation_mode_e { list = 1, show, show_all };
  38 static int mode;
  39 static int interval = 1;
  40 static char *show_monitors_param;
  41 static struct cpupower_topology cpu_top;
  42 static unsigned int wake_cpus;
  43
  44 /* ToDo: Document this in the manpage */
  45 static char range_abbr[RANGE_MAX] = { 'T', 'C', 'P', 'M', };
  46
  47 static void print_wrong_arg_exit(void)
  48 {
  49         printf(_("invalid or unknown argument\n"));
  50         exit(EXIT_FAILURE);
  51 }
  52
  53 long long timespec_diff_us(struct timespec start, struct timespec end)
  54 {
  55         struct timespec temp;
  56         if ((end.tv_nsec - start.tv_nsec) < 0) {
  57                 temp.tv_sec = end.tv_sec - start.tv_sec - 1;
  58                 temp.tv_nsec = 1000000000 + end.tv_nsec - start.tv_nsec;
  59         } else {
  60                 temp.tv_sec = end.tv_sec - start.tv_sec;
  61                 temp.tv_nsec = end.tv_nsec - start.tv_nsec;
  62         }
  63         return (temp.tv_sec * 1000000) + (temp.tv_nsec / 1000);
  64 }
  65
  66 void print_n_spaces(int n)
  67 {
  68         int x;
  69         for (x = 0; x < n; x++)
  70                 printf(" ");
  71 }
  72
  73 /*s is filled with left and right spaces
  74  *to make its length atleast n+1
  75  */
  76 int fill_string_with_spaces(char *s, int n)
  77 {
  78         char *temp;
  79         int len = strlen(s);
  80
  81         if (len >= n)
  82                 return -1;
  83
  84         temp = malloc(sizeof(char) * (n+1));
  85         for (; len < n; len++)
  86                 s[len] = ' ';
  87         s[len] = '\0';
  88         snprintf(temp, n+1, " %s", s);
  89         strcpy(s, temp);
  90         free(temp);
  91         return 0;
  92 }
  93
  94 #define MAX_COL_WIDTH 6
  95 void print_header(int topology_depth)
  96 {
  97         int unsigned mon;
  98         int state, need_len;
  99         cstate_t s;
 100         char buf[128] = "";
 101
 102         fill_string_with_spaces(buf, topology_depth * 5 - 1);
 103         printf("%s|", buf);
 104
 105         for (mon = 0; mon < avail_monitors; mon++) {
 106                 need_len = monitors[mon]->hw_states_num * (MAX_COL_WIDTH + 1)
 107                         - 1;
 108                 if (mon != 0)
 109                         printf("||");
 110                 sprintf(buf, "%s", monitors[mon]->name);
 111                 fill_string_with_spaces(buf, need_len);
 112                 printf("%s", buf);
 113         }
 114         printf("\n");
 115
 116         if (topology_depth > 2)
 117                 printf(" PKG|");
 118         if (topology_depth > 1)
 119                 printf("CORE|");
 120         if (topology_depth > 0)
 121                 printf(" CPU|");
 122
 123         for (mon = 0; mon < avail_monitors; mon++) {
 124                 if (mon != 0)
 125                         printf("||");
 126                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
 127                         if (state != 0)
 128                                 printf("|");
 129                         s = monitors[mon]->hw_states[state];
 130                         sprintf(buf, "%s", s.name);
 131                         fill_string_with_spaces(buf, MAX_COL_WIDTH);
 132                         printf("%s", buf);
 133                 }
 134                 printf(" ");
 135         }
 136         printf("\n");
 137 }
 138
 139
 140 void print_results(int topology_depth, int cpu)
 141 {
 142         unsigned int mon;
 143         int state, ret;
 144         double percent;
 145         unsigned long long result;
 146         cstate_t s;
 147
 148         /* Be careful CPUs may got resorted for pkg value do not just use cpu */
 149         if (!bitmask_isbitset(cpus_chosen, cpu_top.core_info[cpu].cpu))
 150                 return;
 151         if (!cpu_top.core_info[cpu].is_online &&
 152             cpu_top.core_info[cpu].pkg == -1)
 153                 return;
 154
 155         if (topology_depth > 2)
 156                 printf("%4d|", cpu_top.core_info[cpu].pkg);
 157         if (topology_depth > 1)
 158                 printf("%4d|", cpu_top.core_info[cpu].core);
 159         if (topology_depth > 0)
 160                 printf("%4d|", cpu_top.core_info[cpu].cpu);
 161
 162         for (mon = 0; mon < avail_monitors; mon++) {
 163                 if (mon != 0)
 164                         printf("||");
 165
 166                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
 167                         if (state != 0)
 168                                 printf("|");
 169
 170                         s = monitors[mon]->hw_states[state];
 171
 172                         if (s.get_count_percent) {
 173                                 ret = s.get_count_percent(s.id, &percent,
 174                                                   cpu_top.core_info[cpu].cpu);
 175                                 if (ret)
 176                                         printf("******");
 177                                 else if (percent >= 100.0)
 178                                         printf("%6.1f", percent);
 179                                 else
 180                                         printf("%6.2f", percent);
 181                         } else if (s.get_count) {
 182                                 ret = s.get_count(s.id, &result,
 183                                                   cpu_top.core_info[cpu].cpu);
 184                                 if (ret)
 185                                         printf("******");
 186                                 else
 187                                         printf("%6llu", result);
 188                         } else {
 189                                 printf(_("Monitor %s, Counter %s has no count "
 190                                          "function. Implementation error\n"),
 191                                        monitors[mon]->name, s.name);
 192                                 exit(EXIT_FAILURE);
 193                         }
 194                 }
 195         }
 196         /*
 197          * The monitor could still provide useful data, for example
 198          * AMD HW counters partly sit in PCI config space.
 199          * It's up to the monitor plug-in to check .is_online, this one
 200          * is just for additional info.
 201          */
 202         if (!cpu_top.core_info[cpu].is_online &&
 203             cpu_top.core_info[cpu].pkg != -1) {
 204                 printf(_(" *is offline\n"));
 205                 return;
 206         } else
 207                 printf("\n");
 208 }
 209
 210
 211 /* param: string passed by -m param (The list of monitors to show)
 212  *
 213  * Monitors must have been registered already, matching monitors
 214  * are picked out and available monitors array is overridden
 215  * with matching ones
 216  *
 217  * Monitors get sorted in the same order the user passes them
 218 */
 219
 220 static void parse_monitor_param(char *param)
 221 {
 222         unsigned int num;
 223         int mon, hits = 0;
 224         char *tmp = param, *token;
 225         struct cpuidle_monitor *tmp_mons[MONITORS_MAX];
 226
 227
 228         for (mon = 0; mon < MONITORS_MAX; mon++, tmp = NULL) {
 229                 token = strtok(tmp, ",");
 230                 if (token == NULL)
 231                         break;
 232                 if (strlen(token) >= MONITOR_NAME_LEN) {
 233                         printf(_("%s: max monitor name length"
 234                                  " (%d) exceeded\n"), token, MONITOR_NAME_LEN);
 235                         continue;
 236                 }
 237
 238                 for (num = 0; num < avail_monitors; num++) {
 239                         if (!strcmp(monitors[num]->name, token)) {
 240                                 dprint("Found requested monitor: %s\n", token);
 241                                 tmp_mons[hits] = monitors[num];
 242                                 hits++;
 243                         }
 244                 }
 245         }
 246         if (hits == 0) {
 247                 printf(_("No matching monitor found in %s, "
 248                          "try -l option\n"), param);
 249                 exit(EXIT_FAILURE);
 250         }
 251         /* Override detected/registerd monitors array with requested one */
 252         memcpy(monitors, tmp_mons,
 253                 sizeof(struct cpuidle_monitor *) * MONITORS_MAX);
 254         avail_monitors = hits;
 255 }
 256
 257 void list_monitors(void)
 258 {
 259         unsigned int mon;
 260         int state;
 261         cstate_t s;
 262
 263         for (mon = 0; mon < avail_monitors; mon++) {
 264                 printf(_("Monitor \"%s\" (%d states) - Might overflow after %u "
 265                          "s\n"),
 266                         monitors[mon]->name, monitors[mon]->hw_states_num,
 267                         monitors[mon]->overflow_s);
 268
 269                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
 270                         s = monitors[mon]->hw_states[state];
 271                         /*
 272                          * ToDo show more state capabilities:
 273                          * percent, time (granlarity)
 274                          */
 275                         printf("%s\t[%c] -> %s\n", s.name, range_abbr[s.range],
 276                                gettext(s.desc));
 277                 }
 278         }
 279 }
 280
 281 int fork_it(char **argv)
 282 {
 283         int status;
 284         unsigned int num;
 285         unsigned long long timediff;
 286         pid_t child_pid;
 287         struct timespec start, end;
 288
 289         child_pid = fork();
 290         clock_gettime(CLOCK_REALTIME, &start);
 291
 292         for (num = 0; num < avail_monitors; num++)
 293                 monitors[num]->start();
 294
 295         if (!child_pid) {
 296                 /* child */
 297                 execvp(argv[0], argv);
 298         } else {
 299                 /* parent */
 300                 if (child_pid == -1) {
 301                         perror("fork");
 302                         exit(1);
 303                 }
 304
 305                 signal(SIGINT, SIG_IGN);
 306                 signal(SIGQUIT, SIG_IGN);
 307                 if (waitpid(child_pid, &status, 0) == -1) {
 308                         perror("wait");
 309                         exit(1);
 310                 }
 311         }
 312         clock_gettime(CLOCK_REALTIME, &end);
 313         for (num = 0; num < avail_monitors; num++)
 314                 monitors[num]->stop();
 315
 316         timediff = timespec_diff_us(start, end);
 317         if (WIFEXITED(status))
 318                 printf(_("%s took %.5f seconds and exited with status %d\n"),
 319                         argv[0], timediff / (1000.0 * 1000),
 320                         WEXITSTATUS(status));
 321         return 0;
 322 }
 323
 324 int do_interval_measure(int i)
 325 {
 326         unsigned int num;
 327         int cpu;
 328
 329         if (wake_cpus)
 330                 for (cpu = 0; cpu < cpu_count; cpu++)
 331                         bind_cpu(cpu);
 332
 333         for (num = 0; num < avail_monitors; num++) {
 334                 dprint("HW C-state residency monitor: %s - States: %d\n",
 335                        monitors[num]->name, monitors[num]->hw_states_num);
 336                 monitors[num]->start();
 337         }
 338
 339         sleep(i);
 340
 341         if (wake_cpus)
 342                 for (cpu = 0; cpu < cpu_count; cpu++)
 343                         bind_cpu(cpu);
 344
 345         for (num = 0; num < avail_monitors; num++)
 346                 monitors[num]->stop();
 347
 348
 349         return 0;
 350 }
 351
 352 static void cmdline(int argc, char *argv[])
 353 {
 354         int opt;
 355         progname = basename(argv[0]);
 356
 357         while ((opt = getopt(argc, argv, "+lci:m:")) != -1) {
 358                 switch (opt) {
 359                 case 'l':
 360                         if (mode)
 361                                 print_wrong_arg_exit();
 362                         mode = list;
 363                         break;
 364                 case 'i':
 365                         /* only allow -i with -m or no option */
 366                         if (mode && mode != show)
 367                                 print_wrong_arg_exit();
 368                         interval = atoi(optarg);
 369                         break;
 370                 case 'm':
 371                         if (mode)
 372                                 print_wrong_arg_exit();
 373                         mode = show;
 374                         show_monitors_param = optarg;
 375                         break;
 376                 case 'c':
 377                         wake_cpus = 1;
 378                         break;
 379                 default:
 380                         print_wrong_arg_exit();
 381                 }
 382         }
 383         if (!mode)
 384                 mode = show_all;
 385 }
 386
 387 int cmd_monitor(int argc, char **argv)
 388 {
 389         unsigned int num;
 390         struct cpuidle_monitor *test_mon;
 391         int cpu;
 392
 393         cmdline(argc, argv);
 394         cpu_count = get_cpu_topology(&cpu_top);
 395         if (cpu_count < 0) {
 396                 printf(_("Cannot read number of available processors\n"));
 397                 return EXIT_FAILURE;
 398         }
 399
 400         if (!cpu_top.core_info[0].is_online)
 401                 printf("WARNING: at least one cpu is offline\n");
 402
 403         /* Default is: monitor all CPUs */
 404         if (bitmask_isallclear(cpus_chosen))
 405                 bitmask_setall(cpus_chosen);
 406
 407         dprint("System has up to %d CPU cores\n", cpu_count);
 408
 409         for (num = 0; all_monitors[num]; num++) {
 410                 dprint("Try to register: %s\n", all_monitors[num]->name);
 411                 test_mon = all_monitors[num]->do_register();
 412                 if (test_mon) {
 413                         if (test_mon->flags.needs_root && !run_as_root) {
 414                                 fprintf(stderr, _("Available monitor %s needs "
 415                                           "root access\n"), test_mon->name);
 416                                 continue;
 417                         }
 418                         monitors[avail_monitors] = test_mon;
 419                         dprint("%s registered\n", all_monitors[num]->name);
 420                         avail_monitors++;
 421                 }
 422         }
 423
 424         if (avail_monitors == 0) {
 425                 printf(_("No HW Cstate monitors found\n"));
 426                 return 1;
 427         }
 428
 429         if (mode == list) {
 430                 list_monitors();
 431                 exit(EXIT_SUCCESS);
 432         }
 433
 434         if (mode == show)
 435                 parse_monitor_param(show_monitors_param);
 436
 437         dprint("Packages: %d - Cores: %d - CPUs: %d\n",
 438                cpu_top.pkgs, cpu_top.cores, cpu_count);
 439
 440         /*
 441          * if any params left, it must be a command to fork
 442          */
 443         if (argc - optind)
 444                 fork_it(argv + optind);
 445         else
 446                 do_interval_measure(interval);
 447
 448         /* ToDo: Topology parsing needs fixing first to do
 449            this more generically */
 450         if (cpu_top.pkgs > 1)
 451                 print_header(3);
 452         else
 453                 print_header(1);
 454
 455         for (cpu = 0; cpu < cpu_count; cpu++) {
 456                 if (cpu_top.pkgs > 1)
 457                         print_results(3, cpu);
 458                 else
 459                         print_results(1, cpu);
 460         }
 461
 462         for (num = 0; num < avail_monitors; num++)
 463                 monitors[num]->unregister();
 464
 465         cpu_topology_release(cpu_top);
 466         return 0;
 467 }