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