usr.sbin/pmccontrol/pmccontrol.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2003,2004 Joseph Koshy
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/queue.h>
  35 #include <sys/cpuset.h>
  36 #include <sys/sysctl.h>
  37
  38 #include <assert.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <limits.h>
  43 #include <pmc.h>
  44 #include <stdarg.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <sysexits.h>
  49 #include <unistd.h>
  50
  51 /* Compile time defaults */
  52
  53 #define PMCC_PRINT_USAGE        0
  54 #define PMCC_PRINT_EVENTS       1
  55 #define PMCC_LIST_STATE         2
  56 #define PMCC_ENABLE_DISABLE     3
  57 #define PMCC_SHOW_STATISTICS    4
  58
  59 #define PMCC_CPU_ALL            -1
  60 #define PMCC_CPU_WILDCARD       '*'
  61
  62 #define PMCC_PMC_ALL            -1
  63 #define PMCC_PMC_WILDCARD       '*'
  64
  65 #define PMCC_OP_IGNORE          0
  66 #define PMCC_OP_DISABLE         1
  67 #define PMCC_OP_ENABLE          2
  68
  69 #define PMCC_PROGRAM_NAME       "pmccontrol"
  70
  71 static STAILQ_HEAD(pmcc_op_list, pmcc_op) head = STAILQ_HEAD_INITIALIZER(head);
  72
  73 struct pmcc_op {
  74         char    op_cpu;
  75         char    op_pmc;
  76         char    op_op;
  77         STAILQ_ENTRY(pmcc_op) op_next;
  78 };
  79
  80 /* Function Prototypes */
  81 #if     DEBUG
  82 static void     pmcc_init_debug(void);
  83 #endif
  84
  85 static int      pmcc_do_list_state(void);
  86 static int      pmcc_do_enable_disable(struct pmcc_op_list *);
  87 static int      pmcc_do_list_events(void);
  88
  89 /* Globals */
  90
  91 static char usage_message[] =
  92         "Usage:\n"
  93         "       " PMCC_PROGRAM_NAME " -L\n"
  94         "       " PMCC_PROGRAM_NAME " -l\n"
  95         "       " PMCC_PROGRAM_NAME " -s\n"
  96         "       " PMCC_PROGRAM_NAME " [-e pmc | -d pmc | -c cpu] ...";
  97
  98 #if DEBUG
  99 static FILE *debug_stream = NULL;
 100 #endif
 101
 102 #if DEBUG
 103 #define DEBUG_MSG(...)                                                  \
 104         (void) fprintf(debug_stream, "[pmccontrol] " __VA_ARGS__);
 105 #else
 106 #define DEBUG_MSG(m)            /*  */
 107 #endif /* !DEBUG */
 108
 109 #if DEBUG
 110 /* log debug messages to a separate file */
 111 static void
 112 pmcc_init_debug(void)
 113 {
 114         char *fn;
 115
 116         fn = getenv("PMCCONTROL_DEBUG");
 117         if (fn != NULL)
 118         {
 119                 debug_stream = fopen(fn, "w");
 120                 if (debug_stream == NULL)
 121                         debug_stream = stderr;
 122         } else
 123                 debug_stream = stderr;
 124 }
 125 #endif
 126
 127 static int
 128 pmcc_do_enable_disable(struct pmcc_op_list *op_list)
 129 {
 130         int c, error, i, j, ncpu, npmc, t;
 131         struct pmcc_op *np;
 132         unsigned char *map;
 133         unsigned char op;
 134         int cpu, pmc;
 135
 136         if ((ncpu = pmc_ncpu()) < 0)
 137                 err(EX_OSERR, "Unable to determine the number of cpus");
 138
 139         /* Determine the maximum number of PMCs in any CPU. */
 140         npmc = 0;
 141         for (c = 0; c < ncpu; c++) {
 142                 if ((t = pmc_npmc(c)) < 0)
 143                         err(EX_OSERR,
 144                             "Unable to determine the number of PMCs in CPU %d",
 145                             c);
 146                 npmc = MAX(t, npmc);
 147         }
 148
 149         if (npmc == 0)
 150                 errx(EX_CONFIG, "No PMCs found");
 151
 152         if ((map = calloc(npmc, ncpu)) == NULL)
 153                 err(EX_SOFTWARE, "Out of memory");
 154
 155         error = 0;
 156         STAILQ_FOREACH(np, op_list, op_next) {
 157
 158                 cpu = np->op_cpu;
 159                 pmc = np->op_pmc;
 160                 op  = np->op_op;
 161
 162                 if (cpu >= ncpu)
 163                         errx(EX_DATAERR, "CPU id too large: \"%d\"", cpu);
 164
 165                 if (pmc >= npmc)
 166                         errx(EX_DATAERR, "PMC id too large: \"%d\"", pmc);
 167
 168 #define MARKMAP(M,C,P,V)        do {                            \
 169                 *((M) + (C)*npmc + (P)) = (V);                  \
 170 } while (0)
 171
 172 #define SET_PMCS(C,P,V)         do {                            \
 173                 if ((P) == PMCC_PMC_ALL) {                      \
 174                         for (j = 0; j < npmc; j++)              \
 175                                 MARKMAP(map, (C), j, (V));      \
 176                 } else                                          \
 177                         MARKMAP(map, (C), (P), (V));            \
 178 } while (0)
 179
 180 #define MAP(M,C,P)      (*((M) + (C)*npmc + (P)))
 181
 182                 if (cpu == PMCC_CPU_ALL)
 183                         for (i = 0; i < ncpu; i++) {
 184                                 SET_PMCS(i, pmc, op);
 185                         }
 186                 else
 187                         SET_PMCS(cpu, pmc, op);
 188         }
 189
 190         /* Configure PMCS */
 191         for (i = 0; i < ncpu; i++)
 192                 for (j = 0; j < npmc; j++) {
 193                         unsigned char b;
 194
 195                         b = MAP(map, i, j);
 196
 197                         error = 0;
 198
 199                         if (b == PMCC_OP_ENABLE)
 200                                 error = pmc_enable(i, j);
 201                         else if (b == PMCC_OP_DISABLE)
 202                                 error = pmc_disable(i, j);
 203
 204                         if (error < 0)
 205                                 err(EX_OSERR, "%s of PMC %d on CPU %d failed",
 206                                     b == PMCC_OP_ENABLE ? "Enable" : "Disable",
 207                                     j, i);
 208                 }
 209
 210         return error;
 211 }
 212
 213 static int
 214 pmcc_do_list_state(void)
 215 {
 216         cpuset_t logical_cpus_mask;
 217         long cpusetsize;
 218         size_t setsize;
 219         int c, cpu, n, npmc, ncpu;
 220         struct pmc_info *pd;
 221         struct pmc_pmcinfo *pi;
 222         const struct pmc_cpuinfo *pc;
 223
 224         if (pmc_cpuinfo(&pc) != 0)
 225                 err(EX_OSERR, "Unable to determine CPU information");
 226
 227         printf("%d %s CPUs present, with %d PMCs per CPU\n", pc->pm_ncpu,
 228                pmc_name_of_cputype(pc->pm_cputype),
 229                 pc->pm_npmc);
 230
 231         /* Determine the set of logical CPUs. */
 232         cpusetsize = sysconf(_SC_CPUSET_SIZE);
 233         if (cpusetsize == -1 || (u_long)cpusetsize > sizeof(cpuset_t))
 234                 err(EX_OSERR, "Cannot determine which CPUs are logical");
 235         CPU_ZERO(&logical_cpus_mask);
 236         setsize = (size_t)cpusetsize;
 237         if (sysctlbyname("machdep.logical_cpus_mask", &logical_cpus_mask,
 238             &setsize, NULL, 0) < 0)
 239                 CPU_ZERO(&logical_cpus_mask);
 240
 241         ncpu = pc->pm_ncpu;
 242
 243         for (c = cpu = 0; cpu < ncpu; cpu++) {
 244 #if     defined(__i386__) || defined(__amd64__)
 245                 if (pc->pm_cputype == PMC_CPU_INTEL_PIV &&
 246                     CPU_ISSET(cpu, &logical_cpus_mask))
 247                         continue; /* skip P4-style 'logical' cpus */
 248 #endif
 249                 if (pmc_pmcinfo(cpu, &pi) < 0) {
 250                         if (errno == ENXIO)
 251                                 continue;
 252                         err(EX_OSERR, "Unable to get PMC status for CPU %d",
 253                             cpu);
 254                 }
 255
 256                 printf("#CPU %d:\n", c++);
 257                 npmc = pmc_npmc(cpu);
 258                 printf("#N  NAME             CLASS  STATE    ROW-DISP\n");
 259
 260                 for (n = 0; n < npmc; n++) {
 261                         pd = &pi->pm_pmcs[n];
 262
 263                         printf(" %-2d %-16s %-6s %-8s %-10s",
 264                             n,
 265                             pd->pm_name,
 266                             pmc_name_of_class(pd->pm_class),
 267                             pd->pm_enabled ? "ENABLED" : "DISABLED",
 268                             pmc_name_of_disposition(pd->pm_rowdisp));
 269
 270                         if (pd->pm_ownerpid != -1) {
 271                                 printf(" (pid %d)", pd->pm_ownerpid);
 272                                 printf(" %-32s",
 273                                     pmc_name_of_event(pd->pm_event));
 274                                 if (PMC_IS_SAMPLING_MODE(pd->pm_mode))
 275                                         printf(" (reload count %jd)",
 276                                             pd->pm_reloadcount);
 277                         }
 278                         printf("\n");
 279                 }
 280                 free(pi);
 281         }
 282         return 0;
 283 }
 284
 285 #if defined(__i386__) || defined(__amd64__)
 286 static int
 287 pmcc_do_list_events(void)
 288 {
 289         pmc_pmu_print_counters(NULL);
 290         return (0);
 291 }
 292 #else
 293 static int
 294 pmcc_do_list_events(void)
 295 {
 296         enum pmc_class c;
 297         unsigned int i, j, nevents;
 298         const char **eventnamelist;
 299         const struct pmc_cpuinfo *ci;
 300
 301         if (pmc_cpuinfo(&ci) != 0)
 302                 err(EX_OSERR, "Unable to determine CPU information");
 303
 304         eventnamelist = NULL;
 305
 306         for (i = 0; i < ci->pm_nclass; i++) {
 307                 c = ci->pm_classes[i].pm_class;
 308
 309                 printf("%s\n", pmc_name_of_class(c));
 310                 if (pmc_event_names_of_class(c, &eventnamelist, &nevents) < 0)
 311                         err(EX_OSERR,
 312 "ERROR: Cannot find information for event class \"%s\"",
 313                             pmc_name_of_class(c));
 314
 315                 for (j = 0; j < nevents; j++)
 316                         printf("\t%s\n", eventnamelist[j]);
 317
 318                 free(eventnamelist);
 319         }
 320         return 0;
 321 }
 322 #endif
 323
 324 static int
 325 pmcc_show_statistics(void)
 326 {
 327
 328         struct pmc_driverstats gms;
 329
 330         if (pmc_get_driver_stats(&gms) < 0)
 331                 err(EX_OSERR, "ERROR: cannot retrieve driver statistics");
 332
 333         /*
 334          * Print statistics.
 335          */
 336
 337 #define PRINT(N,V)      (void) printf("%-40s %d\n", (N), gms.pm_##V)
 338         PRINT("interrupts processed:", intr_processed);
 339         PRINT("non-PMC interrupts:", intr_ignored);
 340         PRINT("sampling stalls due to space shortages:", intr_bufferfull);
 341         PRINT("system calls:", syscalls);
 342         PRINT("system calls with errors:", syscall_errors);
 343         PRINT("buffer requests:", buffer_requests);
 344         PRINT("buffer requests failed:", buffer_requests_failed);
 345         PRINT("sampling log sweeps:", log_sweeps);
 346
 347         return 0;
 348 }
 349
 350 /*
 351  * Main
 352  */
 353
 354 int
 355 main(int argc, char **argv)
 356 {
 357         int error, command, currentcpu, option, pmc;
 358         char *dummy;
 359         struct pmcc_op *p;
 360
 361 #if DEBUG
 362         pmcc_init_debug();
 363 #endif
 364
 365         /* parse args */
 366
 367         currentcpu = PMCC_CPU_ALL;
 368         command    = PMCC_PRINT_USAGE;
 369         error      = 0;
 370
 371         STAILQ_INIT(&head);
 372
 373         while ((option = getopt(argc, argv, ":c:d:e:lLs")) != -1)
 374                 switch (option) {
 375                 case 'L':
 376                         if (command != PMCC_PRINT_USAGE) {
 377                                 error = 1;
 378                                 break;
 379                         }
 380                         command = PMCC_PRINT_EVENTS;
 381                         break;
 382
 383                 case 'c':
 384                         if (command != PMCC_PRINT_USAGE &&
 385                             command != PMCC_ENABLE_DISABLE) {
 386                                 error = 1;
 387                                 break;
 388                         }
 389                         command = PMCC_ENABLE_DISABLE;
 390
 391                         if (*optarg == PMCC_CPU_WILDCARD)
 392                                 currentcpu = PMCC_CPU_ALL;
 393                         else {
 394                                 currentcpu = strtoul(optarg, &dummy, 0);
 395                                 if (*dummy != '\0' || currentcpu < 0)
 396                                         errx(EX_DATAERR,
 397                                             "\"%s\" is not a valid CPU id",
 398                                             optarg);
 399                         }
 400                         break;
 401
 402                 case 'd':
 403                 case 'e':
 404                         if (command != PMCC_PRINT_USAGE &&
 405                             command != PMCC_ENABLE_DISABLE) {
 406                                 error = 1;
 407                                 break;
 408                         }
 409                         command = PMCC_ENABLE_DISABLE;
 410
 411                         if (*optarg == PMCC_PMC_WILDCARD)
 412                                 pmc = PMCC_PMC_ALL;
 413                         else {
 414                                 pmc = strtoul(optarg, &dummy, 0);
 415                                 if (*dummy != '\0' || pmc < 0)
 416                                         errx(EX_DATAERR,
 417                                             "\"%s\" is not a valid PMC id",
 418                                             optarg);
 419                         }
 420
 421                         if ((p = malloc(sizeof(*p))) == NULL)
 422                                 err(EX_SOFTWARE, "Out of memory");
 423
 424                         p->op_cpu = currentcpu;
 425                         p->op_pmc = pmc;
 426                         p->op_op  = option == 'd' ? PMCC_OP_DISABLE :
 427                             PMCC_OP_ENABLE;
 428
 429                         STAILQ_INSERT_TAIL(&head, p, op_next);
 430                         break;
 431
 432                 case 'l':
 433                         if (command != PMCC_PRINT_USAGE) {
 434                                 error = 1;
 435                                 break;
 436                         }
 437                         command = PMCC_LIST_STATE;
 438                         break;
 439
 440                 case 's':
 441                         if (command != PMCC_PRINT_USAGE) {
 442                                 error = 1;
 443                                 break;
 444                         }
 445                         command = PMCC_SHOW_STATISTICS;
 446                         break;
 447
 448                 case ':':
 449                         errx(EX_USAGE,
 450                             "Missing argument to option '-%c'", optopt);
 451                         break;
 452
 453                 case '?':
 454                         warnx("Unrecognized option \"-%c\"", optopt);
 455                         errx(EX_USAGE, "%s", usage_message);
 456                         break;
 457
 458                 default:
 459                         error = 1;
 460                         break;
 461
 462                 }
 463
 464         if (command == PMCC_PRINT_USAGE)
 465                 (void) errx(EX_USAGE, "%s", usage_message);
 466
 467         if (error)
 468                 exit(EX_USAGE);
 469
 470         if (pmc_init() < 0)
 471                 err(EX_UNAVAILABLE,
 472                     "Initialization of the pmc(3) library failed");
 473
 474         switch (command) {
 475         case PMCC_LIST_STATE:
 476                 error = pmcc_do_list_state();
 477                 break;
 478         case PMCC_PRINT_EVENTS:
 479                 error = pmcc_do_list_events();
 480                 break;
 481         case PMCC_SHOW_STATISTICS:
 482                 error = pmcc_show_statistics();
 483                 break;
 484         case PMCC_ENABLE_DISABLE:
 485                 if (STAILQ_EMPTY(&head))
 486                         errx(EX_USAGE,
 487                             "No PMCs specified to enable or disable");
 488                 error = pmcc_do_enable_disable(&head);
 489                 break;
 490         default:
 491                 assert(0);
 492
 493         }
 494
 495         if (error != 0)
 496                 err(EX_OSERR, "Command failed");
 497         exit(0);
 498 }