1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003-2008, Joseph Koshy 5 * Copyright (c) 2007 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by A. Joseph Koshy under 9 * sponsorship from the FreeBSD Foundation and Google, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/cpuset.h> 35 #include <sys/event.h> 36 #include <sys/queue.h> 37 #include <sys/socket.h> 38 #include <sys/stat.h> 39 #include <sys/sysctl.h> 40 #include <sys/time.h> 41 #include <sys/ttycom.h> 42 #include <sys/user.h> 43 #include <sys/wait.h> 44 45 #include <assert.h> 46 #include <curses.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <kvm.h> 51 #include <libgen.h> 52 #include <limits.h> 53 #include <math.h> 54 #include <pmc.h> 55 #include <pmclog.h> 56 #include <regex.h> 57 #include <signal.h> 58 #include <stdarg.h> 59 #include <stdbool.h> 60 #include <stdint.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <sysexits.h> 65 #include <unistd.h> 66 67 #include <libpmcstat.h> 68 69 #include "pmcstat.h" 70 71 /* 72 * A given invocation of pmcstat(8) can manage multiple PMCs of both 73 * the system-wide and per-process variety. Each of these could be in 74 * 'counting mode' or in 'sampling mode'. 75 * 76 * For 'counting mode' PMCs, pmcstat(8) will periodically issue a 77 * pmc_read() at the configured time interval and print out the value 78 * of the requested PMCs. 79 * 80 * For 'sampling mode' PMCs it can log to a file for offline analysis, 81 * or can analyse sampling data "on the fly", either by converting 82 * samples to printed textual form or by creating gprof(1) compatible 83 * profiles, one per program executed. When creating gprof(1) 84 * profiles it can optionally merge entries from multiple processes 85 * for a given executable into a single profile file. 86 * 87 * pmcstat(8) can also execute a command line and attach PMCs to the 88 * resulting child process. The protocol used is as follows: 89 * 90 * - parent creates a socketpair for two way communication and 91 * fork()s. 92 * - subsequently: 93 * 94 * /Parent/ /Child/ 95 * 96 * - Wait for child's token. 97 * - Sends token. 98 * - Awaits signal to start. 99 * - Attaches PMCs to the child's pid 100 * and starts them. Sets up 101 * monitoring for the child. 102 * - Signals child to start. 103 * - Receives signal, attempts exec(). 104 * 105 * After this point normal processing can happen. 106 */ 107 108 /* Globals */ 109 110 int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT; 111 int pmcstat_displaywidth = DEFAULT_DISPLAY_WIDTH; 112 static int pmcstat_sockpair[NSOCKPAIRFD]; 113 static int pmcstat_kq; 114 static kvm_t *pmcstat_kvm; 115 static struct kinfo_proc *pmcstat_plist; 116 struct pmcstat_args args; 117 static bool libpmc_initialized = false; 118 119 static void 120 pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask) 121 { 122 int cpu; 123 const char *s; 124 char *end; 125 126 CPU_ZERO(cpumask); 127 s = cpuspec; 128 129 do { 130 cpu = strtol(s, &end, 0); 131 if (cpu < 0 || end == s) 132 errx(EX_USAGE, 133 "ERROR: Illegal CPU specification \"%s\".", 134 cpuspec); 135 CPU_SET(cpu, cpumask); 136 s = end + strspn(end, ", \t"); 137 } while (*s); 138 assert(!CPU_EMPTY(cpumask)); 139 } 140 141 void 142 pmcstat_cleanup(void) 143 { 144 struct pmcstat_ev *ev; 145 146 /* release allocated PMCs. */ 147 STAILQ_FOREACH(ev, &args.pa_events, ev_next) 148 if (ev->ev_pmcid != PMC_ID_INVALID) { 149 if (pmc_stop(ev->ev_pmcid) < 0) 150 err(EX_OSERR, 151 "ERROR: cannot stop pmc 0x%x \"%s\"", 152 ev->ev_pmcid, ev->ev_name); 153 if (pmc_release(ev->ev_pmcid) < 0) 154 err(EX_OSERR, 155 "ERROR: cannot release pmc 0x%x \"%s\"", 156 ev->ev_pmcid, ev->ev_name); 157 } 158 159 /* de-configure the log file if present. */ 160 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE)) 161 (void) pmc_configure_logfile(-1); 162 163 if (args.pa_logparser) { 164 pmclog_close(args.pa_logparser); 165 args.pa_logparser = NULL; 166 } 167 168 pmcstat_log_shutdown_logging(); 169 } 170 171 void 172 pmcstat_find_targets(const char *spec) 173 { 174 int n, nproc, pid, rv; 175 struct pmcstat_target *pt; 176 char errbuf[_POSIX2_LINE_MAX], *end; 177 static struct kinfo_proc *kp; 178 regex_t reg; 179 regmatch_t regmatch; 180 181 /* First check if we've been given a process id. */ 182 pid = strtol(spec, &end, 0); 183 if (end != spec && pid >= 0) { 184 if ((pt = malloc(sizeof(*pt))) == NULL) 185 goto outofmemory; 186 pt->pt_pid = pid; 187 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); 188 return; 189 } 190 191 /* Otherwise treat arg as a regular expression naming processes. */ 192 if (pmcstat_kvm == NULL) { 193 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0, 194 errbuf)) == NULL) 195 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"", 196 errbuf); 197 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC, 198 0, &nproc)) == NULL) 199 err(EX_OSERR, "ERROR: Cannot get process list: %s", 200 kvm_geterr(pmcstat_kvm)); 201 } else 202 nproc = 0; 203 204 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) { 205 regerror(rv, ®, errbuf, sizeof(errbuf)); 206 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s", 207 spec, errbuf); 208 } 209 210 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) { 211 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) { 212 if ((pt = malloc(sizeof(*pt))) == NULL) 213 goto outofmemory; 214 pt->pt_pid = kp->ki_pid; 215 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); 216 } else if (rv != REG_NOMATCH) { 217 regerror(rv, ®, errbuf, sizeof(errbuf)); 218 errx(EX_SOFTWARE, "ERROR: Regex evaluation failed: %s", 219 errbuf); 220 } 221 } 222 223 regfree(®); 224 225 return; 226 227 outofmemory: 228 errx(EX_SOFTWARE, "Out of memory."); 229 /*NOTREACHED*/ 230 } 231 232 void 233 pmcstat_kill_process(void) 234 { 235 struct pmcstat_target *pt; 236 237 assert(args.pa_flags & FLAG_HAS_COMMANDLINE); 238 239 /* 240 * If a command line was specified, it would be the very first 241 * in the list, before any other processes specified by -t. 242 */ 243 pt = SLIST_FIRST(&args.pa_targets); 244 assert(pt != NULL); 245 246 if (kill(pt->pt_pid, SIGINT) != 0) 247 err(EX_OSERR, "ERROR: cannot signal child process"); 248 } 249 250 void 251 pmcstat_start_pmcs(void) 252 { 253 struct pmcstat_ev *ev; 254 255 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 256 257 assert(ev->ev_pmcid != PMC_ID_INVALID); 258 259 if (pmc_start(ev->ev_pmcid) < 0) { 260 warn("ERROR: Cannot start pmc 0x%x \"%s\"", 261 ev->ev_pmcid, ev->ev_name); 262 pmcstat_cleanup(); 263 exit(EX_OSERR); 264 } 265 } 266 } 267 268 void 269 pmcstat_print_headers(void) 270 { 271 struct pmcstat_ev *ev; 272 int c, w; 273 274 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX); 275 276 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 277 if (PMC_IS_SAMPLING_MODE(ev->ev_mode)) 278 continue; 279 280 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p'; 281 282 if (ev->ev_fieldskip != 0) 283 (void) fprintf(args.pa_printfile, "%*s", 284 ev->ev_fieldskip, ""); 285 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2; 286 287 if (c == 's') 288 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ", 289 ev->ev_cpu, w-3, ev->ev_name); 290 else 291 (void) fprintf(args.pa_printfile, "p/%*s ", w, 292 ev->ev_name); 293 } 294 295 (void) fflush(args.pa_printfile); 296 } 297 298 void 299 pmcstat_print_counters(void) 300 { 301 int extra_width; 302 struct pmcstat_ev *ev; 303 pmc_value_t value; 304 305 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1; 306 307 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 308 309 /* skip sampling mode counters */ 310 if (PMC_IS_SAMPLING_MODE(ev->ev_mode)) 311 continue; 312 313 if (pmc_read(ev->ev_pmcid, &value) < 0) 314 err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"", 315 ev->ev_name); 316 317 (void) fprintf(args.pa_printfile, "%*ju ", 318 ev->ev_fieldwidth + extra_width, 319 (uintmax_t) ev->ev_cumulative ? value : 320 (value - ev->ev_saved)); 321 322 if (ev->ev_cumulative == 0) 323 ev->ev_saved = value; 324 extra_width = 0; 325 } 326 327 (void) fflush(args.pa_printfile); 328 } 329 330 /* 331 * Print output 332 */ 333 334 void 335 pmcstat_print_pmcs(void) 336 { 337 static int linecount = 0; 338 339 /* check if we need to print a header line */ 340 if (++linecount > pmcstat_displayheight) { 341 (void) fprintf(args.pa_printfile, "\n"); 342 linecount = 1; 343 } 344 if (linecount == 1) 345 pmcstat_print_headers(); 346 (void) fprintf(args.pa_printfile, "\n"); 347 348 pmcstat_print_counters(); 349 } 350 351 void 352 pmcstat_show_usage(void) 353 { 354 errx(EX_USAGE, 355 "[options] [commandline]\n" 356 "\t Measure process and/or system performance using hardware\n" 357 "\t performance monitoring counters.\n" 358 "\t Options include:\n" 359 "\t -C\t\t (toggle) show cumulative counts\n" 360 "\t -D path\t create profiles in directory \"path\"\n" 361 "\t -E\t\t (toggle) show counts at process exit\n" 362 "\t -F file\t write a system-wide callgraph (Kcachegrind format)" 363 " to \"file\"\n" 364 "\t -G file\t write a system-wide callgraph to \"file\"\n" 365 "\t -I\t\t don't resolve leaf function name, show address instead\n" 366 "\t -L\t\t list all counters available on this host\n" 367 "\t -M file\t print executable/gmon file map to \"file\"\n" 368 "\t -N\t\t (toggle) capture callchains\n" 369 "\t -O file\t send log output to \"file\"\n" 370 "\t -P spec\t allocate a process-private sampling PMC\n" 371 "\t -R file\t read events from \"file\"\n" 372 "\t -S spec\t allocate a system-wide sampling PMC\n" 373 "\t -T\t\t start in top mode\n" 374 "\t -U \t\t merged user kernel stack capture\n" 375 "\t -W\t\t (toggle) show counts per context switch\n" 376 "\t -a file\t print sampled PCs and callgraph to \"file\"\n" 377 "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n" 378 "\t -d\t\t (toggle) track descendants\n" 379 "\t -e\t\t use wide history counter for gprof(1) output\n" 380 "\t -f spec\t pass \"spec\" to as plugin option\n" 381 "\t -g\t\t produce gprof(1) compatible profiles\n" 382 "\t -i lwp\t\t filter on thread id \"lwp\" in post-processing\n" 383 "\t -l secs\t set duration time\n" 384 "\t -m file\t print sampled PCs to \"file\"\n" 385 "\t -n rate\t set sampling rate\n" 386 "\t -o file\t send print output to \"file\"\n" 387 "\t -p spec\t allocate a process-private counting PMC\n" 388 "\t -q\t\t suppress verbosity\n" 389 "\t -r fsroot\t specify FS root directory\n" 390 "\t -s spec\t allocate a system-wide counting PMC\n" 391 "\t -t process-spec attach to running processes matching " 392 "\"process-spec\"\n" 393 "\t -u spec \t provide short description of counters matching spec\n" 394 "\t -v\t\t increase verbosity\n" 395 "\t -w secs\t set printing time interval\n" 396 "\t -z depth\t limit callchain display depth" 397 ); 398 } 399 400 /* 401 * At exit handler for top mode 402 */ 403 404 void 405 pmcstat_topexit(void) 406 { 407 if (!args.pa_toptty) 408 return; 409 410 /* 411 * Shutdown ncurses. 412 */ 413 clrtoeol(); 414 refresh(); 415 endwin(); 416 } 417 418 static inline void 419 libpmc_initialize(int *npmc) 420 { 421 422 if (libpmc_initialized) 423 return; 424 if (pmc_init() < 0) 425 err(EX_UNAVAILABLE, "ERROR: Initialization of the pmc(3)" 426 " library failed"); 427 428 /* assume all CPUs are identical */ 429 if ((*npmc = pmc_npmc(0)) < 0) 430 err(EX_OSERR, "ERROR: Cannot determine the number of PMCs on " 431 "CPU %d", 0); 432 libpmc_initialized = true; 433 } 434 /* 435 * Main 436 */ 437 438 int 439 main(int argc, char **argv) 440 { 441 cpuset_t cpumask, dommask, rootmask; 442 double interval; 443 double duration; 444 int option, npmc; 445 int c, check_driver_stats; 446 int do_callchain, do_descendants, do_logproccsw, do_logprocexit; 447 int do_print, do_read, do_listcounters, do_descr, domains; 448 int do_userspace, i; 449 size_t len; 450 int graphdepth; 451 int pipefd[2], rfd; 452 int use_cumulative_counts; 453 short cf, cb; 454 uint64_t current_sampling_count; 455 char *end, *event; 456 const char *errmsg, *graphfilename; 457 enum pmcstat_state runstate; 458 struct pmc_driverstats ds_start, ds_end; 459 struct pmcstat_ev *ev; 460 struct sigaction sa; 461 struct kevent kev; 462 struct winsize ws; 463 struct stat sb; 464 uint32_t caps; 465 466 check_driver_stats = 0; 467 current_sampling_count = 0; 468 do_callchain = 1; 469 do_descr = 0; 470 do_descendants = 0; 471 do_userspace = 0; 472 do_logproccsw = 0; 473 do_logprocexit = 0; 474 do_listcounters = 0; 475 domains = 0; 476 use_cumulative_counts = 0; 477 graphfilename = "-"; 478 args.pa_required = 0; 479 args.pa_flags = 0; 480 args.pa_verbosity = 1; 481 args.pa_logfd = -1; 482 args.pa_fsroot = ""; 483 args.pa_samplesdir = "."; 484 args.pa_printfile = stderr; 485 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH; 486 args.pa_graphfile = NULL; 487 args.pa_interval = DEFAULT_WAIT_INTERVAL; 488 args.pa_mapfilename = NULL; 489 args.pa_inputpath = NULL; 490 args.pa_outputpath = NULL; 491 args.pa_pplugin = PMCSTAT_PL_NONE; 492 args.pa_plugin = PMCSTAT_PL_NONE; 493 args.pa_ctdumpinstr = 1; 494 args.pa_topmode = PMCSTAT_TOP_DELTA; 495 args.pa_toptty = 0; 496 args.pa_topcolor = 0; 497 args.pa_mergepmc = 0; 498 args.pa_duration = 0.0; 499 STAILQ_INIT(&args.pa_events); 500 SLIST_INIT(&args.pa_targets); 501 bzero(&ds_start, sizeof(ds_start)); 502 bzero(&ds_end, sizeof(ds_end)); 503 ev = NULL; 504 event = NULL; 505 caps = 0; 506 CPU_ZERO(&cpumask); 507 508 len = sizeof(domains); 509 if (sysctlbyname("vm.ndomains", &domains, &len, NULL, 0) == -1) 510 err(EX_OSERR, "ERROR: Cannot get number of domains"); 511 512 /* 513 * The initial CPU mask specifies the root mask of this process 514 * which is usually all CPUs in the system. 515 */ 516 if (cpuset_getaffinity(CPU_LEVEL_ROOT, CPU_WHICH_PID, -1, 517 sizeof(rootmask), &rootmask) == -1) 518 err(EX_OSERR, "ERROR: Cannot determine the root set of CPUs"); 519 CPU_COPY(&rootmask, &cpumask); 520 521 while ((option = getopt(argc, argv, 522 "ACD:EF:G:ILM:NO:P:R:S:TUWZa:c:def:gi:l:m:n:o:p:qr:s:t:u:vw:z:")) != -1) 523 switch (option) { 524 case 'A': 525 args.pa_flags |= FLAG_SKIP_TOP_FN_RES; 526 break; 527 528 case 'a': /* Annotate + callgraph */ 529 args.pa_flags |= FLAG_DO_ANNOTATE; 530 args.pa_plugin = PMCSTAT_PL_ANNOTATE_CG; 531 graphfilename = optarg; 532 break; 533 534 case 'C': /* cumulative values */ 535 use_cumulative_counts = !use_cumulative_counts; 536 args.pa_required |= FLAG_HAS_COUNTING_PMCS; 537 break; 538 539 case 'c': /* CPU */ 540 if (optarg[0] == '*' && optarg[1] == '\0') 541 CPU_COPY(&rootmask, &cpumask); 542 else 543 pmcstat_get_cpumask(optarg, &cpumask); 544 545 args.pa_flags |= FLAGS_HAS_CPUMASK; 546 args.pa_required |= FLAG_HAS_SYSTEM_PMCS; 547 break; 548 549 case 'D': 550 if (stat(optarg, &sb) < 0) 551 err(EX_OSERR, "ERROR: Cannot stat \"%s\"", 552 optarg); 553 if (!S_ISDIR(sb.st_mode)) 554 errx(EX_USAGE, 555 "ERROR: \"%s\" is not a directory.", 556 optarg); 557 args.pa_samplesdir = optarg; 558 args.pa_flags |= FLAG_HAS_SAMPLESDIR; 559 args.pa_required |= FLAG_DO_GPROF; 560 break; 561 562 case 'd': /* toggle descendents */ 563 do_descendants = !do_descendants; 564 args.pa_required |= FLAG_HAS_PROCESS_PMCS; 565 break; 566 567 case 'E': /* log process exit */ 568 do_logprocexit = !do_logprocexit; 569 args.pa_required |= (FLAG_HAS_PROCESS_PMCS | 570 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE); 571 break; 572 573 case 'e': /* wide gprof metrics */ 574 args.pa_flags |= FLAG_DO_WIDE_GPROF_HC; 575 break; 576 577 case 'F': /* produce a system-wide calltree */ 578 args.pa_flags |= FLAG_DO_CALLGRAPHS; 579 args.pa_plugin = PMCSTAT_PL_CALLTREE; 580 graphfilename = optarg; 581 break; 582 583 case 'f': /* plugins options */ 584 if (args.pa_plugin == PMCSTAT_PL_NONE) 585 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T."); 586 pmcstat_pluginconfigure_log(optarg); 587 break; 588 589 case 'G': /* produce a system-wide callgraph */ 590 args.pa_flags |= FLAG_DO_CALLGRAPHS; 591 args.pa_plugin = PMCSTAT_PL_CALLGRAPH; 592 graphfilename = optarg; 593 break; 594 595 case 'g': /* produce gprof compatible profiles */ 596 args.pa_flags |= FLAG_DO_GPROF; 597 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH; 598 args.pa_plugin = PMCSTAT_PL_GPROF; 599 break; 600 601 case 'i': 602 args.pa_flags |= FLAG_FILTER_THREAD_ID; 603 args.pa_tid = strtol(optarg, &end, 0); 604 break; 605 606 case 'I': 607 args.pa_flags |= FLAG_SHOW_OFFSET; 608 break; 609 610 case 'L': 611 do_listcounters = 1; 612 break; 613 614 case 'l': /* time duration in seconds */ 615 duration = strtod(optarg, &end); 616 if (*end != '\0' || duration <= 0) 617 errx(EX_USAGE, "ERROR: Illegal duration time " 618 "value \"%s\".", optarg); 619 args.pa_flags |= FLAG_HAS_DURATION; 620 args.pa_duration = duration; 621 break; 622 623 case 'm': 624 args.pa_flags |= FLAG_DO_ANNOTATE; 625 args.pa_plugin = PMCSTAT_PL_ANNOTATE; 626 graphfilename = optarg; 627 break; 628 629 case 'M': /* mapfile */ 630 args.pa_mapfilename = optarg; 631 break; 632 633 case 'N': 634 do_callchain = !do_callchain; 635 args.pa_required |= FLAG_HAS_SAMPLING_PMCS; 636 break; 637 638 case 'p': /* process virtual counting PMC */ 639 case 's': /* system-wide counting PMC */ 640 case 'P': /* process virtual sampling PMC */ 641 case 'S': /* system-wide sampling PMC */ 642 caps = 0; 643 if ((ev = malloc(sizeof(*ev))) == NULL) 644 errx(EX_SOFTWARE, "ERROR: Out of memory."); 645 646 switch (option) { 647 case 'p': ev->ev_mode = PMC_MODE_TC; break; 648 case 's': ev->ev_mode = PMC_MODE_SC; break; 649 case 'P': ev->ev_mode = PMC_MODE_TS; break; 650 case 'S': ev->ev_mode = PMC_MODE_SS; break; 651 } 652 653 if (option == 'P' || option == 'p') { 654 args.pa_flags |= FLAG_HAS_PROCESS_PMCS; 655 args.pa_required |= (FLAG_HAS_COMMANDLINE | 656 FLAG_HAS_TARGET); 657 } 658 659 if (option == 'P' || option == 'S') { 660 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS; 661 args.pa_required |= (FLAG_HAS_PIPE | 662 FLAG_HAS_OUTPUT_LOGFILE); 663 } 664 665 if (option == 'p' || option == 's') 666 args.pa_flags |= FLAG_HAS_COUNTING_PMCS; 667 668 if (option == 's' || option == 'S') 669 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS; 670 671 ev->ev_spec = strdup(optarg); 672 if (ev->ev_spec == NULL) 673 errx(EX_SOFTWARE, "ERROR: Out of memory."); 674 675 if (option == 'S' || option == 'P') 676 ev->ev_count = current_sampling_count ? current_sampling_count : pmc_pmu_sample_rate_get(ev->ev_spec); 677 else 678 ev->ev_count = 0; 679 680 if (option == 'S' || option == 's') 681 ev->ev_cpu = CPU_FFS(&cpumask) - 1; 682 else 683 ev->ev_cpu = PMC_CPU_ANY; 684 685 ev->ev_flags = 0; 686 if (do_callchain) { 687 ev->ev_flags |= PMC_F_CALLCHAIN; 688 if (do_userspace) 689 ev->ev_flags |= PMC_F_USERCALLCHAIN; 690 } 691 if (do_descendants) 692 ev->ev_flags |= PMC_F_DESCENDANTS; 693 if (do_logprocexit) 694 ev->ev_flags |= PMC_F_LOG_PROCEXIT; 695 if (do_logproccsw) 696 ev->ev_flags |= PMC_F_LOG_PROCCSW; 697 698 ev->ev_cumulative = use_cumulative_counts; 699 700 ev->ev_saved = 0LL; 701 ev->ev_pmcid = PMC_ID_INVALID; 702 703 /* extract event name */ 704 c = strcspn(optarg, ", \t"); 705 ev->ev_name = malloc(c + 1); 706 if (ev->ev_name == NULL) 707 errx(EX_SOFTWARE, "ERROR: Out of memory."); 708 (void) strncpy(ev->ev_name, optarg, c); 709 *(ev->ev_name + c) = '\0'; 710 711 libpmc_initialize(&npmc); 712 713 if (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) { 714 /* 715 * We need to check the capabilities of the 716 * desired event to determine if it should be 717 * allocated on every CPU, or only a subset of 718 * them. This requires allocating a PMC now. 719 */ 720 if (pmc_allocate(ev->ev_spec, ev->ev_mode, 721 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid, 722 ev->ev_count) < 0) 723 err(EX_OSERR, "ERROR: Cannot allocate " 724 "system-mode pmc with specification" 725 " \"%s\"", ev->ev_spec); 726 if (pmc_capabilities(ev->ev_pmcid, &caps)) { 727 pmc_release(ev->ev_pmcid); 728 err(EX_OSERR, "ERROR: Cannot get pmc " 729 "capabilities"); 730 } 731 732 /* 733 * Release the PMC now that we have caps; we 734 * will reallocate shortly. 735 */ 736 pmc_release(ev->ev_pmcid); 737 ev->ev_pmcid = PMC_ID_INVALID; 738 } 739 740 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next); 741 742 if ((caps & PMC_CAP_SYSWIDE) == PMC_CAP_SYSWIDE) 743 break; 744 if ((caps & PMC_CAP_DOMWIDE) == PMC_CAP_DOMWIDE) { 745 CPU_ZERO(&cpumask); 746 /* 747 * Get number of domains and allocate one 748 * counter in each. 749 * First already allocated. 750 */ 751 for (i = 1; i < domains; i++) { 752 CPU_ZERO(&dommask); 753 cpuset_getaffinity(CPU_LEVEL_WHICH, 754 CPU_WHICH_DOMAIN, i, sizeof(dommask), 755 &dommask); 756 CPU_SET(CPU_FFS(&dommask) - 1, &cpumask); 757 } 758 args.pa_flags |= FLAGS_HAS_CPUMASK; 759 } 760 if (option == 's' || option == 'S') { 761 CPU_CLR(ev->ev_cpu, &cpumask); 762 pmcstat_clone_event_descriptor(ev, &cpumask, &args); 763 CPU_SET(ev->ev_cpu, &cpumask); 764 } 765 766 break; 767 768 case 'n': /* sampling count */ 769 current_sampling_count = strtol(optarg, &end, 0); 770 if (*end != '\0' || current_sampling_count <= 0) 771 errx(EX_USAGE, 772 "ERROR: Illegal count value \"%s\".", 773 optarg); 774 args.pa_required |= FLAG_HAS_SAMPLING_PMCS; 775 break; 776 777 case 'o': /* outputfile */ 778 if (args.pa_printfile != NULL && 779 args.pa_printfile != stdout && 780 args.pa_printfile != stderr) 781 (void) fclose(args.pa_printfile); 782 if ((args.pa_printfile = fopen(optarg, "w")) == NULL) 783 errx(EX_OSERR, 784 "ERROR: cannot open \"%s\" for writing.", 785 optarg); 786 args.pa_flags |= FLAG_DO_PRINT; 787 break; 788 789 case 'O': /* sampling output */ 790 if (args.pa_outputpath) 791 errx(EX_USAGE, 792 "ERROR: option -O may only be specified once."); 793 args.pa_outputpath = optarg; 794 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE; 795 break; 796 797 case 'q': /* quiet mode */ 798 args.pa_verbosity = 0; 799 break; 800 801 case 'r': /* root FS path */ 802 args.pa_fsroot = optarg; 803 break; 804 805 case 'R': /* read an existing log file */ 806 if (args.pa_inputpath != NULL) 807 errx(EX_USAGE, 808 "ERROR: option -R may only be specified once."); 809 args.pa_inputpath = optarg; 810 if (args.pa_printfile == stderr) 811 args.pa_printfile = stdout; 812 args.pa_flags |= FLAG_READ_LOGFILE; 813 break; 814 815 case 't': /* target pid or process name */ 816 pmcstat_find_targets(optarg); 817 818 args.pa_flags |= FLAG_HAS_TARGET; 819 args.pa_required |= FLAG_HAS_PROCESS_PMCS; 820 break; 821 822 case 'T': /* top mode */ 823 args.pa_flags |= FLAG_DO_TOP; 824 args.pa_plugin = PMCSTAT_PL_CALLGRAPH; 825 args.pa_ctdumpinstr = 0; 826 args.pa_mergepmc = 1; 827 if (args.pa_printfile == stderr) 828 args.pa_printfile = stdout; 829 break; 830 831 case 'u': 832 do_descr = 1; 833 event = optarg; 834 break; 835 case 'U': /* toggle user-space callchain capture */ 836 do_userspace = !do_userspace; 837 args.pa_required |= FLAG_HAS_SAMPLING_PMCS; 838 break; 839 case 'v': /* verbose */ 840 args.pa_verbosity++; 841 break; 842 843 case 'w': /* wait interval */ 844 interval = strtod(optarg, &end); 845 if (*end != '\0' || interval <= 0) 846 errx(EX_USAGE, 847 "ERROR: Illegal wait interval value \"%s\".", 848 optarg); 849 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL; 850 args.pa_interval = interval; 851 break; 852 853 case 'W': /* toggle LOG_CSW */ 854 do_logproccsw = !do_logproccsw; 855 args.pa_required |= (FLAG_HAS_PROCESS_PMCS | 856 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE); 857 break; 858 859 case 'z': 860 graphdepth = strtod(optarg, &end); 861 if (*end != '\0' || graphdepth <= 0) 862 errx(EX_USAGE, 863 "ERROR: Illegal callchain depth \"%s\".", 864 optarg); 865 args.pa_graphdepth = graphdepth; 866 args.pa_required |= FLAG_DO_CALLGRAPHS; 867 break; 868 869 case '?': 870 default: 871 pmcstat_show_usage(); 872 break; 873 874 } 875 if ((do_listcounters | do_descr) && 876 pmc_pmu_enabled() == 0) 877 errx(EX_USAGE, "pmu features not supported on host or hwpmc not loaded"); 878 if (do_listcounters) { 879 pmc_pmu_print_counters(NULL); 880 } else if (do_descr) { 881 pmc_pmu_print_counter_desc(event); 882 } 883 if (do_listcounters | do_descr) 884 exit(0); 885 886 args.pa_argc = (argc -= optind); 887 args.pa_argv = (argv += optind); 888 889 /* If we read from logfile and no specified CPU mask use 890 * the maximum CPU count. 891 */ 892 if ((args.pa_flags & FLAG_READ_LOGFILE) && 893 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0) 894 CPU_FILL(&cpumask); 895 896 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */ 897 898 if (argc) /* command line present */ 899 args.pa_flags |= FLAG_HAS_COMMANDLINE; 900 901 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS | 902 FLAG_DO_ANNOTATE | FLAG_DO_TOP)) 903 args.pa_flags |= FLAG_DO_ANALYSIS; 904 905 /* 906 * Check invocation syntax. 907 */ 908 909 /* disallow -O and -R together */ 910 if (args.pa_outputpath && args.pa_inputpath) 911 errx(EX_USAGE, 912 "ERROR: options -O and -R are mutually exclusive."); 913 914 /* disallow -T and -l together */ 915 if ((args.pa_flags & FLAG_HAS_DURATION) && 916 (args.pa_flags & FLAG_DO_TOP)) 917 errx(EX_USAGE, "ERROR: options -T and -l are mutually " 918 "exclusive."); 919 920 /* -a and -m require -R */ 921 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL) 922 errx(EX_USAGE, "ERROR: option %s requires an input file", 923 args.pa_plugin == PMCSTAT_PL_ANNOTATE ? "-m" : "-a"); 924 925 /* -m option is not allowed combined with -g or -G. */ 926 if (args.pa_flags & FLAG_DO_ANNOTATE && 927 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS)) 928 errx(EX_USAGE, 929 "ERROR: option -m and -g | -G are mutually exclusive"); 930 931 if (args.pa_flags & FLAG_READ_LOGFILE) { 932 errmsg = NULL; 933 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 934 errmsg = "a command line specification"; 935 else if (args.pa_flags & FLAG_HAS_TARGET) 936 errmsg = "option -t"; 937 else if (!STAILQ_EMPTY(&args.pa_events)) 938 errmsg = "a PMC event specification"; 939 if (errmsg) 940 errx(EX_USAGE, 941 "ERROR: option -R may not be used with %s.", 942 errmsg); 943 } else if (STAILQ_EMPTY(&args.pa_events)) 944 /* All other uses require a PMC spec. */ 945 pmcstat_show_usage(); 946 947 /* check for -t pid without a process PMC spec */ 948 if ((args.pa_flags & FLAG_HAS_TARGET) && 949 (args.pa_required & FLAG_HAS_PROCESS_PMCS) && 950 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0) 951 errx(EX_USAGE, 952 "ERROR: option -t requires a process mode PMC to be specified." 953 ); 954 955 /* check for process-mode options without a command or -t pid */ 956 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) && 957 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0) 958 errx(EX_USAGE, 959 "ERROR: options -d, -E, -p, -P, and -W require a command line or target process." 960 ); 961 962 /* check for -p | -P without a target process of some sort */ 963 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) && 964 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0) 965 errx(EX_USAGE, 966 "ERROR: options -P and -p require a target process or a command line." 967 ); 968 969 /* check for process-mode options without a process-mode PMC */ 970 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) && 971 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0) 972 errx(EX_USAGE, 973 "ERROR: options -d, -E, -t, and -W require a process mode PMC to be specified." 974 ); 975 976 /* check for -c cpu with no system mode PMCs or logfile. */ 977 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) && 978 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 && 979 (args.pa_flags & FLAG_READ_LOGFILE) == 0) 980 errx(EX_USAGE, 981 "ERROR: option -c requires at least one system mode PMC to be specified." 982 ); 983 984 /* check for counting mode options without a counting PMC */ 985 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) && 986 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0) 987 errx(EX_USAGE, 988 "ERROR: options -C, -W and -o require at least one counting mode PMC to be specified." 989 ); 990 991 /* check for sampling mode options without a sampling PMC spec */ 992 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) && 993 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0) 994 errx(EX_USAGE, 995 "ERROR: options -N, -n and -O require at least one sampling mode PMC to be specified." 996 ); 997 998 /* check if -g/-G/-m/-T are being used correctly */ 999 if ((args.pa_flags & FLAG_DO_ANALYSIS) && 1000 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE))) 1001 errx(EX_USAGE, 1002 "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified." 1003 ); 1004 1005 /* check if -e was specified without -g */ 1006 if ((args.pa_flags & FLAG_DO_WIDE_GPROF_HC) && 1007 !(args.pa_flags & FLAG_DO_GPROF)) 1008 errx(EX_USAGE, 1009 "ERROR: option -e requires gprof mode to be specified." 1010 ); 1011 1012 /* check if -O was spuriously specified */ 1013 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) && 1014 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) 1015 errx(EX_USAGE, 1016 "ERROR: option -O is used only with options -E, -P, -S and -W." 1017 ); 1018 1019 /* -D only applies to gprof output mode (-g) */ 1020 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) && 1021 (args.pa_flags & FLAG_DO_GPROF) == 0) 1022 errx(EX_USAGE, "ERROR: option -D is only used with -g."); 1023 1024 /* -M mapfile requires -g or -R */ 1025 if (args.pa_mapfilename != NULL && 1026 (args.pa_flags & FLAG_DO_GPROF) == 0 && 1027 (args.pa_flags & FLAG_READ_LOGFILE) == 0) 1028 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R."); 1029 1030 /* 1031 * Disallow textual output of sampling PMCs if counting PMCs 1032 * have also been asked for, mostly because the combined output 1033 * is difficult to make sense of. 1034 */ 1035 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) && 1036 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) && 1037 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0)) 1038 errx(EX_USAGE, 1039 "ERROR: option -O is required if counting and sampling PMCs are specified together." 1040 ); 1041 1042 /* 1043 * If we have a callgraph be created, select the outputfile. 1044 */ 1045 if (args.pa_flags & FLAG_DO_CALLGRAPHS) { 1046 if (strcmp(graphfilename, "-") == 0) 1047 args.pa_graphfile = args.pa_printfile; 1048 else { 1049 args.pa_graphfile = fopen(graphfilename, "w"); 1050 if (args.pa_graphfile == NULL) 1051 err(EX_OSERR, 1052 "ERROR: cannot open \"%s\" for writing", 1053 graphfilename); 1054 } 1055 } 1056 if (args.pa_flags & FLAG_DO_ANNOTATE) { 1057 args.pa_graphfile = fopen(graphfilename, "w"); 1058 if (args.pa_graphfile == NULL) 1059 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing", 1060 graphfilename); 1061 } 1062 1063 /* if we've been asked to process a log file, skip init */ 1064 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) 1065 libpmc_initialize(&npmc); 1066 1067 /* Allocate a kqueue */ 1068 if ((pmcstat_kq = kqueue()) < 0) 1069 err(EX_OSERR, "ERROR: Cannot allocate kqueue"); 1070 1071 /* Setup the logfile as the source. */ 1072 if (args.pa_flags & FLAG_READ_LOGFILE) { 1073 /* 1074 * Print the log in textual form if we haven't been 1075 * asked to generate profiling information. 1076 */ 1077 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0) 1078 args.pa_flags |= FLAG_DO_PRINT; 1079 1080 pmcstat_log_initialize_logging(); 1081 rfd = pmcstat_open_log(args.pa_inputpath, 1082 PMCSTAT_OPEN_FOR_READ); 1083 if ((args.pa_logparser = pmclog_open(rfd)) == NULL) 1084 err(EX_OSERR, "ERROR: Cannot create parser"); 1085 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0) 1086 err(EX_OSERR, "ERROR: fcntl(2) failed"); 1087 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD, 1088 0, 0, NULL); 1089 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1090 err(EX_OSERR, "ERROR: Cannot register kevent"); 1091 } 1092 /* 1093 * Configure the specified log file or setup a default log 1094 * consumer via a pipe. 1095 */ 1096 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) { 1097 if (args.pa_outputpath) 1098 args.pa_logfd = pmcstat_open_log(args.pa_outputpath, 1099 PMCSTAT_OPEN_FOR_WRITE); 1100 else { 1101 /* 1102 * process the log on the fly by reading it in 1103 * through a pipe. 1104 */ 1105 if (pipe(pipefd) < 0) 1106 err(EX_OSERR, "ERROR: pipe(2) failed"); 1107 1108 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0) 1109 err(EX_OSERR, "ERROR: fcntl(2) failed"); 1110 1111 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD, 1112 0, 0, NULL); 1113 1114 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1115 err(EX_OSERR, "ERROR: Cannot register kevent"); 1116 1117 args.pa_logfd = pipefd[WRITEPIPEFD]; 1118 1119 args.pa_flags |= FLAG_HAS_PIPE; 1120 if ((args.pa_flags & FLAG_DO_TOP) == 0) 1121 args.pa_flags |= FLAG_DO_PRINT; 1122 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]); 1123 } 1124 1125 if (pmc_configure_logfile(args.pa_logfd) < 0) 1126 err(EX_OSERR, "ERROR: Cannot configure log file"); 1127 } 1128 1129 /* remember to check for driver errors if we are sampling or logging */ 1130 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) || 1131 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE); 1132 1133 /* 1134 if (args.pa_flags & FLAG_READ_LOGFILE) { 1135 * Allocate PMCs. 1136 */ 1137 1138 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 1139 if (pmc_allocate(ev->ev_spec, ev->ev_mode, 1140 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid, 1141 ev->ev_count) < 0) 1142 err(EX_OSERR, 1143 "ERROR: Cannot allocate %s-mode pmc with specification \"%s\"", 1144 PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 1145 "system" : "process", ev->ev_spec); 1146 1147 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) && 1148 pmc_set(ev->ev_pmcid, ev->ev_count) < 0) 1149 err(EX_OSERR, 1150 "ERROR: Cannot set sampling count for PMC \"%s\"", 1151 ev->ev_name); 1152 } 1153 1154 /* compute printout widths */ 1155 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 1156 int counter_width; 1157 int display_width; 1158 int header_width; 1159 1160 (void) pmc_width(ev->ev_pmcid, &counter_width); 1161 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */ 1162 display_width = (int) floor(counter_width / 3.32193) + 1; 1163 1164 if (PMC_IS_SYSTEM_MODE(ev->ev_mode)) 1165 header_width += 3; /* 2 digit CPU number + '/' */ 1166 1167 if (header_width > display_width) { 1168 ev->ev_fieldskip = 0; 1169 ev->ev_fieldwidth = header_width; 1170 } else { 1171 ev->ev_fieldskip = display_width - 1172 header_width; 1173 ev->ev_fieldwidth = display_width; 1174 } 1175 } 1176 1177 /* 1178 * If our output is being set to a terminal, register a handler 1179 * for window size changes. 1180 */ 1181 1182 if (isatty(fileno(args.pa_printfile))) { 1183 1184 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0) 1185 err(EX_OSERR, "ERROR: Cannot determine window size"); 1186 1187 pmcstat_displayheight = ws.ws_row - 1; 1188 pmcstat_displaywidth = ws.ws_col - 1; 1189 1190 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1191 1192 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1193 err(EX_OSERR, 1194 "ERROR: Cannot register kevent for SIGWINCH"); 1195 1196 args.pa_toptty = 1; 1197 } 1198 1199 /* 1200 * Listen to key input in top mode. 1201 */ 1202 if (args.pa_flags & FLAG_DO_TOP) { 1203 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL); 1204 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1205 err(EX_OSERR, "ERROR: Cannot register kevent"); 1206 } 1207 1208 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1209 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1210 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT"); 1211 1212 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1213 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1214 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO"); 1215 1216 /* 1217 * An exec() failure of a forked child is signalled by the 1218 * child sending the parent a SIGCHLD. We don't register an 1219 * actual signal handler for SIGCHLD, but instead use our 1220 * kqueue to pick up the signal. 1221 */ 1222 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1223 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1224 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD"); 1225 1226 /* 1227 * Setup a timer if we have counting mode PMCs needing to be printed or 1228 * top mode plugin is active. 1229 */ 1230 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) && 1231 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) || 1232 (args.pa_flags & FLAG_DO_TOP)) { 1233 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0, 1234 args.pa_interval * 1000, NULL); 1235 1236 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1237 err(EX_OSERR, 1238 "ERROR: Cannot register kevent for timer"); 1239 } 1240 1241 /* 1242 * Setup a duration timer if we have sampling mode PMCs and 1243 * a duration time is set 1244 */ 1245 if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) && 1246 (args.pa_flags & FLAG_HAS_DURATION)) { 1247 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0, 1248 args.pa_duration * 1000, NULL); 1249 1250 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1251 err(EX_OSERR, "ERROR: Cannot register kevent for " 1252 "time duration"); 1253 } 1254 1255 /* attach PMCs to the target process, starting it if specified */ 1256 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 1257 pmcstat_create_process(pmcstat_sockpair, &args, pmcstat_kq); 1258 1259 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0) 1260 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics"); 1261 1262 /* Attach process pmcs to the target process. */ 1263 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) { 1264 if (SLIST_EMPTY(&args.pa_targets)) 1265 errx(EX_DATAERR, 1266 "ERROR: No matching target processes."); 1267 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS) 1268 pmcstat_attach_pmcs(&args); 1269 1270 if (pmcstat_kvm) { 1271 kvm_close(pmcstat_kvm); 1272 pmcstat_kvm = NULL; 1273 } 1274 } 1275 1276 /* start the pmcs */ 1277 pmcstat_start_pmcs(); 1278 1279 /* start the (commandline) process if needed */ 1280 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 1281 pmcstat_start_process(pmcstat_sockpair); 1282 1283 /* initialize logging */ 1284 pmcstat_log_initialize_logging(); 1285 1286 /* Handle SIGINT using the kqueue loop */ 1287 sa.sa_handler = SIG_IGN; 1288 sa.sa_flags = 0; 1289 (void) sigemptyset(&sa.sa_mask); 1290 1291 if (sigaction(SIGINT, &sa, NULL) < 0) 1292 err(EX_OSERR, "ERROR: Cannot install signal handler"); 1293 1294 /* 1295 * Setup the top mode display. 1296 */ 1297 if (args.pa_flags & FLAG_DO_TOP) { 1298 args.pa_flags &= ~FLAG_DO_PRINT; 1299 1300 if (args.pa_toptty) { 1301 /* 1302 * Init ncurses. 1303 */ 1304 initscr(); 1305 if(has_colors() == TRUE) { 1306 args.pa_topcolor = 1; 1307 start_color(); 1308 use_default_colors(); 1309 pair_content(0, &cf, &cb); 1310 init_pair(1, COLOR_RED, cb); 1311 init_pair(2, COLOR_YELLOW, cb); 1312 init_pair(3, COLOR_GREEN, cb); 1313 } 1314 cbreak(); 1315 noecho(); 1316 nonl(); 1317 nodelay(stdscr, 1); 1318 intrflush(stdscr, FALSE); 1319 keypad(stdscr, TRUE); 1320 clear(); 1321 /* Get terminal width / height with ncurses. */ 1322 getmaxyx(stdscr, 1323 pmcstat_displayheight, pmcstat_displaywidth); 1324 pmcstat_displayheight--; pmcstat_displaywidth--; 1325 atexit(pmcstat_topexit); 1326 } 1327 } 1328 1329 /* 1330 * loop till either the target process (if any) exits, or we 1331 * are killed by a SIGINT or we reached the time duration. 1332 */ 1333 runstate = PMCSTAT_RUNNING; 1334 do_print = do_read = 0; 1335 do { 1336 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) { 1337 if (errno != EINTR) 1338 err(EX_OSERR, "ERROR: kevent failed"); 1339 else 1340 continue; 1341 } 1342 1343 if (kev.flags & EV_ERROR) 1344 errc(EX_OSERR, kev.data, "ERROR: kevent failed"); 1345 1346 switch (kev.filter) { 1347 case EVFILT_PROC: /* target has exited */ 1348 runstate = pmcstat_close_log(&args); 1349 do_print = 1; 1350 break; 1351 1352 case EVFILT_READ: /* log file data is present */ 1353 if (kev.ident == (unsigned)fileno(stdin) && 1354 (args.pa_flags & FLAG_DO_TOP)) { 1355 if (pmcstat_keypress_log()) 1356 runstate = pmcstat_close_log(&args); 1357 } else { 1358 do_read = 0; 1359 runstate = pmcstat_process_log(); 1360 } 1361 break; 1362 1363 case EVFILT_SIGNAL: 1364 if (kev.ident == SIGCHLD) { 1365 /* 1366 * The child process sends us a 1367 * SIGCHLD if its exec() failed. We 1368 * wait for it to exit and then exit 1369 * ourselves. 1370 */ 1371 (void) wait(&c); 1372 runstate = PMCSTAT_FINISHED; 1373 } else if (kev.ident == SIGIO) { 1374 /* 1375 * We get a SIGIO if a PMC loses all 1376 * of its targets, or if logfile 1377 * writes encounter an error. 1378 */ 1379 runstate = pmcstat_close_log(&args); 1380 do_print = 1; /* print PMCs at exit */ 1381 } else if (kev.ident == SIGINT) { 1382 /* Kill the child process if we started it */ 1383 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 1384 pmcstat_kill_process(); 1385 runstate = pmcstat_close_log(&args); 1386 } else if (kev.ident == SIGWINCH) { 1387 if (ioctl(fileno(args.pa_printfile), 1388 TIOCGWINSZ, &ws) < 0) 1389 err(EX_OSERR, 1390 "ERROR: Cannot determine window size"); 1391 pmcstat_displayheight = ws.ws_row - 1; 1392 pmcstat_displaywidth = ws.ws_col - 1; 1393 } else 1394 assert(0); 1395 1396 break; 1397 1398 case EVFILT_TIMER: 1399 /* time duration reached, exit */ 1400 if (args.pa_flags & FLAG_HAS_DURATION) { 1401 runstate = PMCSTAT_FINISHED; 1402 break; 1403 } 1404 /* print out counting PMCs */ 1405 if ((args.pa_flags & FLAG_DO_TOP) && 1406 (args.pa_flags & FLAG_HAS_PIPE) && 1407 pmc_flush_logfile() == 0) 1408 do_read = 1; 1409 do_print = 1; 1410 break; 1411 1412 } 1413 1414 if (do_print && !do_read) { 1415 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) { 1416 pmcstat_print_pmcs(); 1417 if (runstate == PMCSTAT_FINISHED && 1418 /* final newline */ 1419 (args.pa_flags & FLAG_DO_PRINT) == 0) 1420 (void) fprintf(args.pa_printfile, "\n"); 1421 } 1422 if (args.pa_flags & FLAG_DO_TOP) 1423 pmcstat_display_log(); 1424 do_print = 0; 1425 } 1426 1427 } while (runstate != PMCSTAT_FINISHED); 1428 1429 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) { 1430 pmcstat_topexit(); 1431 args.pa_toptty = 0; 1432 } 1433 1434 /* flush any pending log entries */ 1435 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE)) 1436 pmc_close_logfile(); 1437 1438 pmcstat_cleanup(); 1439 1440 /* check if the driver lost any samples or events */ 1441 if (check_driver_stats) { 1442 if (pmc_get_driver_stats(&ds_end) < 0) 1443 err(EX_OSERR, 1444 "ERROR: Cannot retrieve driver statistics"); 1445 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull && 1446 args.pa_verbosity > 0) 1447 warnx( 1448 "WARNING: sampling was paused at least %u time%s.\n" 1449 "Please consider tuning the \"kern.hwpmc.nsamples\" tunable.", 1450 ds_end.pm_intr_bufferfull - 1451 ds_start.pm_intr_bufferfull, 1452 ((ds_end.pm_intr_bufferfull - 1453 ds_start.pm_intr_bufferfull) != 1) ? "s" : "" 1454 ); 1455 if (ds_start.pm_buffer_requests_failed != 1456 ds_end.pm_buffer_requests_failed && 1457 args.pa_verbosity > 0) 1458 warnx( 1459 "WARNING: at least %u event%s were discarded while running.\n" 1460 "Please consider tuning the \"kern.hwpmc.nbuffers_pcpu\" tunable.", 1461 ds_end.pm_buffer_requests_failed - 1462 ds_start.pm_buffer_requests_failed, 1463 ((ds_end.pm_buffer_requests_failed - 1464 ds_start.pm_buffer_requests_failed) != 1) ? "s" : "" 1465 ); 1466 } 1467 1468 exit(EX_OK); 1469 } 1470