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