1 /*- 2 * Copyright (c) 2003-2008, Joseph Koshy 3 * Copyright (c) 2007 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by A. Joseph Koshy under 7 * sponsorship from the FreeBSD Foundation and Google, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 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 <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 "pmcstat.h" 68 69 /* 70 * A given invocation of pmcstat(8) can manage multiple PMCs of both 71 * the system-wide and per-process variety. Each of these could be in 72 * 'counting mode' or in 'sampling mode'. 73 * 74 * For 'counting mode' PMCs, pmcstat(8) will periodically issue a 75 * pmc_read() at the configured time interval and print out the value 76 * of the requested PMCs. 77 * 78 * For 'sampling mode' PMCs it can log to a file for offline analysis, 79 * or can analyse sampling data "on the fly", either by converting 80 * samples to printed textual form or by creating gprof(1) compatible 81 * profiles, one per program executed. When creating gprof(1) 82 * profiles it can optionally merge entries from multiple processes 83 * for a given executable into a single profile file. 84 * 85 * pmcstat(8) can also execute a command line and attach PMCs to the 86 * resulting child process. The protocol used is as follows: 87 * 88 * - parent creates a socketpair for two way communication and 89 * fork()s. 90 * - subsequently: 91 * 92 * /Parent/ /Child/ 93 * 94 * - Wait for childs token. 95 * - Sends token. 96 * - Awaits signal to start. 97 * - Attaches PMCs to the child's pid 98 * and starts them. Sets up 99 * monitoring for the child. 100 * - Signals child to start. 101 * - Receives signal, attempts exec(). 102 * 103 * After this point normal processing can happen. 104 */ 105 106 /* Globals */ 107 108 int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT; 109 int pmcstat_displaywidth = DEFAULT_DISPLAY_WIDTH; 110 static int pmcstat_sockpair[NSOCKPAIRFD]; 111 static int pmcstat_kq; 112 static kvm_t *pmcstat_kvm; 113 static struct kinfo_proc *pmcstat_plist; 114 struct pmcstat_args args; 115 116 static void 117 pmcstat_clone_event_descriptor(struct pmcstat_ev *ev, const cpuset_t *cpumask) 118 { 119 int cpu; 120 struct pmcstat_ev *ev_clone; 121 122 for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { 123 if (!CPU_ISSET(cpu, cpumask)) 124 continue; 125 126 if ((ev_clone = malloc(sizeof(*ev_clone))) == NULL) 127 errx(EX_SOFTWARE, "ERROR: Out of memory"); 128 (void) memset(ev_clone, 0, sizeof(*ev_clone)); 129 130 ev_clone->ev_count = ev->ev_count; 131 ev_clone->ev_cpu = cpu; 132 ev_clone->ev_cumulative = ev->ev_cumulative; 133 ev_clone->ev_flags = ev->ev_flags; 134 ev_clone->ev_mode = ev->ev_mode; 135 ev_clone->ev_name = strdup(ev->ev_name); 136 ev_clone->ev_pmcid = ev->ev_pmcid; 137 ev_clone->ev_saved = ev->ev_saved; 138 ev_clone->ev_spec = strdup(ev->ev_spec); 139 140 STAILQ_INSERT_TAIL(&args.pa_events, ev_clone, ev_next); 141 } 142 } 143 144 static void 145 pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask) 146 { 147 int cpu; 148 const char *s; 149 char *end; 150 151 CPU_ZERO(cpumask); 152 s = cpuspec; 153 154 do { 155 cpu = strtol(s, &end, 0); 156 if (cpu < 0 || end == s) 157 errx(EX_USAGE, 158 "ERROR: Illegal CPU specification \"%s\".", 159 cpuspec); 160 CPU_SET(cpu, cpumask); 161 s = end + strspn(end, ", \t"); 162 } while (*s); 163 assert(!CPU_EMPTY(cpumask)); 164 } 165 166 void 167 pmcstat_attach_pmcs(void) 168 { 169 struct pmcstat_ev *ev; 170 struct pmcstat_target *pt; 171 int count; 172 173 /* Attach all process PMCs to target processes. */ 174 count = 0; 175 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 176 if (PMC_IS_SYSTEM_MODE(ev->ev_mode)) 177 continue; 178 SLIST_FOREACH(pt, &args.pa_targets, pt_next) 179 if (pmc_attach(ev->ev_pmcid, pt->pt_pid) == 0) 180 count++; 181 else if (errno != ESRCH) 182 err(EX_OSERR, 183 "ERROR: cannot attach pmc \"%s\" to process %d", 184 ev->ev_name, (int)pt->pt_pid); 185 } 186 187 if (count == 0) 188 errx(EX_DATAERR, "ERROR: No processes were attached to."); 189 } 190 191 192 void 193 pmcstat_cleanup(void) 194 { 195 struct pmcstat_ev *ev, *tmp; 196 197 /* release allocated PMCs. */ 198 STAILQ_FOREACH_SAFE(ev, &args.pa_events, ev_next, tmp) 199 if (ev->ev_pmcid != PMC_ID_INVALID) { 200 if (pmc_stop(ev->ev_pmcid) < 0) 201 err(EX_OSERR, "ERROR: cannot stop pmc 0x%x \"%s\"", 202 ev->ev_pmcid, ev->ev_name); 203 if (pmc_release(ev->ev_pmcid) < 0) 204 err(EX_OSERR, "ERROR: cannot release pmc 0x%x \"%s\"", 205 ev->ev_pmcid, ev->ev_name); 206 free(ev->ev_name); 207 free(ev->ev_spec); 208 STAILQ_REMOVE(&args.pa_events, ev, pmcstat_ev, ev_next); 209 free(ev); 210 } 211 212 /* de-configure the log file if present. */ 213 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE)) 214 (void) pmc_configure_logfile(-1); 215 216 if (args.pa_logparser) { 217 pmclog_close(args.pa_logparser); 218 args.pa_logparser = NULL; 219 } 220 221 pmcstat_shutdown_logging(); 222 } 223 224 void 225 pmcstat_create_process(void) 226 { 227 char token; 228 pid_t pid; 229 struct kevent kev; 230 struct pmcstat_target *pt; 231 232 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pmcstat_sockpair) < 0) 233 err(EX_OSERR, "ERROR: cannot create socket pair"); 234 235 switch (pid = fork()) { 236 case -1: 237 err(EX_OSERR, "ERROR: cannot fork"); 238 /*NOTREACHED*/ 239 240 case 0: /* child */ 241 (void) close(pmcstat_sockpair[PARENTSOCKET]); 242 243 /* Write a token to tell our parent we've started executing. */ 244 if (write(pmcstat_sockpair[CHILDSOCKET], "+", 1) != 1) 245 err(EX_OSERR, "ERROR (child): cannot write token"); 246 247 /* Wait for our parent to signal us to start. */ 248 if (read(pmcstat_sockpair[CHILDSOCKET], &token, 1) < 0) 249 err(EX_OSERR, "ERROR (child): cannot read token"); 250 (void) close(pmcstat_sockpair[CHILDSOCKET]); 251 252 /* exec() the program requested */ 253 execvp(*args.pa_argv, args.pa_argv); 254 /* and if that fails, notify the parent */ 255 kill(getppid(), SIGCHLD); 256 err(EX_OSERR, "ERROR: execvp \"%s\" failed", *args.pa_argv); 257 /*NOTREACHED*/ 258 259 default: /* parent */ 260 (void) close(pmcstat_sockpair[CHILDSOCKET]); 261 break; 262 } 263 264 /* Ask to be notified via a kevent when the target process exits. */ 265 EV_SET(&kev, pid, EVFILT_PROC, EV_ADD|EV_ONESHOT, NOTE_EXIT, 0, 266 NULL); 267 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 268 err(EX_OSERR, "ERROR: cannot monitor child process %d", pid); 269 270 if ((pt = malloc(sizeof(*pt))) == NULL) 271 errx(EX_SOFTWARE, "ERROR: Out of memory."); 272 273 pt->pt_pid = pid; 274 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); 275 276 /* Wait for the child to signal that its ready to go. */ 277 if (read(pmcstat_sockpair[PARENTSOCKET], &token, 1) < 0) 278 err(EX_OSERR, "ERROR (parent): cannot read token"); 279 280 return; 281 } 282 283 void 284 pmcstat_find_targets(const char *spec) 285 { 286 int n, nproc, pid, rv; 287 struct pmcstat_target *pt; 288 char errbuf[_POSIX2_LINE_MAX], *end; 289 static struct kinfo_proc *kp; 290 regex_t reg; 291 regmatch_t regmatch; 292 293 /* First check if we've been given a process id. */ 294 pid = strtol(spec, &end, 0); 295 if (end != spec && pid >= 0) { 296 if ((pt = malloc(sizeof(*pt))) == NULL) 297 goto outofmemory; 298 pt->pt_pid = pid; 299 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); 300 return; 301 } 302 303 /* Otherwise treat arg as a regular expression naming processes. */ 304 if (pmcstat_kvm == NULL) { 305 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0, 306 errbuf)) == NULL) 307 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"", 308 errbuf); 309 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC, 310 0, &nproc)) == NULL) 311 err(EX_OSERR, "ERROR: Cannot get process list: %s", 312 kvm_geterr(pmcstat_kvm)); 313 } else 314 nproc = 0; 315 316 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) { 317 regerror(rv, ®, errbuf, sizeof(errbuf)); 318 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s", 319 spec, errbuf); 320 } 321 322 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) { 323 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) { 324 if ((pt = malloc(sizeof(*pt))) == NULL) 325 goto outofmemory; 326 pt->pt_pid = kp->ki_pid; 327 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); 328 } else if (rv != REG_NOMATCH) { 329 regerror(rv, ®, errbuf, sizeof(errbuf)); 330 errx(EX_SOFTWARE, "ERROR: Regex evalation failed: %s", 331 errbuf); 332 } 333 } 334 335 regfree(®); 336 337 return; 338 339 outofmemory: 340 errx(EX_SOFTWARE, "Out of memory."); 341 /*NOTREACHED*/ 342 } 343 344 void 345 pmcstat_kill_process(void) 346 { 347 struct pmcstat_target *pt; 348 349 assert(args.pa_flags & FLAG_HAS_COMMANDLINE); 350 351 /* 352 * If a command line was specified, it would be the very first 353 * in the list, before any other processes specified by -t. 354 */ 355 pt = SLIST_FIRST(&args.pa_targets); 356 assert(pt != NULL); 357 358 if (kill(pt->pt_pid, SIGINT) != 0) 359 err(EX_OSERR, "ERROR: cannot signal child process"); 360 } 361 362 void 363 pmcstat_start_pmcs(void) 364 { 365 struct pmcstat_ev *ev; 366 367 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 368 369 assert(ev->ev_pmcid != PMC_ID_INVALID); 370 371 if (pmc_start(ev->ev_pmcid) < 0) { 372 warn("ERROR: Cannot start pmc 0x%x \"%s\"", 373 ev->ev_pmcid, ev->ev_name); 374 pmcstat_cleanup(); 375 exit(EX_OSERR); 376 } 377 } 378 379 } 380 381 void 382 pmcstat_print_headers(void) 383 { 384 struct pmcstat_ev *ev; 385 int c, w; 386 387 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX); 388 389 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 390 if (PMC_IS_SAMPLING_MODE(ev->ev_mode)) 391 continue; 392 393 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p'; 394 395 if (ev->ev_fieldskip != 0) 396 (void) fprintf(args.pa_printfile, "%*s", 397 ev->ev_fieldskip, ""); 398 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2; 399 400 if (c == 's') 401 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ", 402 ev->ev_cpu, w-3, ev->ev_name); 403 else 404 (void) fprintf(args.pa_printfile, "p/%*s ", w, 405 ev->ev_name); 406 } 407 408 (void) fflush(args.pa_printfile); 409 } 410 411 void 412 pmcstat_print_counters(void) 413 { 414 int extra_width; 415 struct pmcstat_ev *ev; 416 pmc_value_t value; 417 418 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1; 419 420 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 421 422 /* skip sampling mode counters */ 423 if (PMC_IS_SAMPLING_MODE(ev->ev_mode)) 424 continue; 425 426 if (pmc_read(ev->ev_pmcid, &value) < 0) 427 err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"", 428 ev->ev_name); 429 430 (void) fprintf(args.pa_printfile, "%*ju ", 431 ev->ev_fieldwidth + extra_width, 432 (uintmax_t) ev->ev_cumulative ? value : 433 (value - ev->ev_saved)); 434 435 if (ev->ev_cumulative == 0) 436 ev->ev_saved = value; 437 extra_width = 0; 438 } 439 440 (void) fflush(args.pa_printfile); 441 } 442 443 /* 444 * Print output 445 */ 446 447 void 448 pmcstat_print_pmcs(void) 449 { 450 static int linecount = 0; 451 452 /* check if we need to print a header line */ 453 if (++linecount > pmcstat_displayheight) { 454 (void) fprintf(args.pa_printfile, "\n"); 455 linecount = 1; 456 } 457 if (linecount == 1) 458 pmcstat_print_headers(); 459 (void) fprintf(args.pa_printfile, "\n"); 460 461 pmcstat_print_counters(); 462 463 return; 464 } 465 466 /* 467 * Do process profiling 468 * 469 * If a pid was specified, attach each allocated PMC to the target 470 * process. Otherwise, fork a child and attach the PMCs to the child, 471 * and have the child exec() the target program. 472 */ 473 474 void 475 pmcstat_start_process(void) 476 { 477 /* Signal the child to proceed. */ 478 if (write(pmcstat_sockpair[PARENTSOCKET], "!", 1) != 1) 479 err(EX_OSERR, "ERROR (parent): write of token failed"); 480 481 (void) close(pmcstat_sockpair[PARENTSOCKET]); 482 } 483 484 void 485 pmcstat_show_usage(void) 486 { 487 errx(EX_USAGE, 488 "[options] [commandline]\n" 489 "\t Measure process and/or system performance using hardware\n" 490 "\t performance monitoring counters.\n" 491 "\t Options include:\n" 492 "\t -C\t\t (toggle) show cumulative counts\n" 493 "\t -D path\t create profiles in directory \"path\"\n" 494 "\t -E\t\t (toggle) show counts at process exit\n" 495 "\t -F file\t write a system-wide callgraph (Kcachegrind format)" 496 " to \"file\"\n" 497 "\t -G file\t write a system-wide callgraph to \"file\"\n" 498 "\t -M file\t print executable/gmon file map to \"file\"\n" 499 "\t -N\t\t (toggle) capture callchains\n" 500 "\t -O file\t send log output to \"file\"\n" 501 "\t -P spec\t allocate a process-private sampling PMC\n" 502 "\t -R file\t read events from \"file\"\n" 503 "\t -S spec\t allocate a system-wide sampling PMC\n" 504 "\t -T\t\t start in top mode\n" 505 "\t -W\t\t (toggle) show counts per context switch\n" 506 "\t -a file\t print sampled PCs and callgraph to \"file\"\n" 507 "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n" 508 "\t -d\t\t (toggle) track descendants\n" 509 "\t -f spec\t pass \"spec\" to as plugin option\n" 510 "\t -g\t\t produce gprof(1) compatible profiles\n" 511 "\t -k dir\t\t set the path to the kernel\n" 512 "\t -l secs\t set duration time\n" 513 "\t -m file\t print sampled PCs to \"file\"\n" 514 "\t -n rate\t set sampling rate\n" 515 "\t -o file\t send print output to \"file\"\n" 516 "\t -p spec\t allocate a process-private counting PMC\n" 517 "\t -q\t\t suppress verbosity\n" 518 "\t -r fsroot\t specify FS root directory\n" 519 "\t -s spec\t allocate a system-wide counting PMC\n" 520 "\t -t process-spec attach to running processes matching " 521 "\"process-spec\"\n" 522 "\t -v\t\t increase verbosity\n" 523 "\t -w secs\t set printing time interval\n" 524 "\t -z depth\t limit callchain display depth" 525 ); 526 } 527 528 /* 529 * At exit handler for top mode 530 */ 531 532 void 533 pmcstat_topexit(void) 534 { 535 if (!args.pa_toptty) 536 return; 537 538 /* 539 * Shutdown ncurses. 540 */ 541 clrtoeol(); 542 refresh(); 543 endwin(); 544 } 545 546 /* 547 * Main 548 */ 549 550 int 551 main(int argc, char **argv) 552 { 553 cpuset_t cpumask, rootmask; 554 double interval; 555 double duration; 556 int option, npmc; 557 int c, check_driver_stats, current_sampling_count; 558 int do_callchain, do_descendants, do_logproccsw, do_logprocexit; 559 int do_print, do_read; 560 size_t len; 561 int graphdepth; 562 int pipefd[2], rfd; 563 int use_cumulative_counts; 564 short cf, cb; 565 char *end, *tmp; 566 const char *errmsg, *graphfilename; 567 enum pmcstat_state runstate; 568 struct pmc_driverstats ds_start, ds_end; 569 struct pmcstat_ev *ev; 570 struct sigaction sa; 571 struct kevent kev; 572 struct winsize ws; 573 struct stat sb; 574 char buffer[PATH_MAX]; 575 576 check_driver_stats = 0; 577 current_sampling_count = DEFAULT_SAMPLE_COUNT; 578 do_callchain = 1; 579 do_descendants = 0; 580 do_logproccsw = 0; 581 do_logprocexit = 0; 582 use_cumulative_counts = 0; 583 graphfilename = "-"; 584 args.pa_required = 0; 585 args.pa_flags = 0; 586 args.pa_verbosity = 1; 587 args.pa_logfd = -1; 588 args.pa_fsroot = ""; 589 args.pa_samplesdir = "."; 590 args.pa_printfile = stderr; 591 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH; 592 args.pa_graphfile = NULL; 593 args.pa_interval = DEFAULT_WAIT_INTERVAL; 594 args.pa_mapfilename = NULL; 595 args.pa_inputpath = NULL; 596 args.pa_outputpath = NULL; 597 args.pa_pplugin = PMCSTAT_PL_NONE; 598 args.pa_plugin = PMCSTAT_PL_NONE; 599 args.pa_ctdumpinstr = 1; 600 args.pa_topmode = PMCSTAT_TOP_DELTA; 601 args.pa_toptty = 0; 602 args.pa_topcolor = 0; 603 args.pa_mergepmc = 0; 604 args.pa_duration = 0.0; 605 STAILQ_INIT(&args.pa_events); 606 SLIST_INIT(&args.pa_targets); 607 bzero(&ds_start, sizeof(ds_start)); 608 bzero(&ds_end, sizeof(ds_end)); 609 ev = NULL; 610 CPU_ZERO(&cpumask); 611 612 /* Default to using the running system kernel. */ 613 len = 0; 614 if (sysctlbyname("kern.bootfile", NULL, &len, NULL, 0) == -1) 615 err(EX_OSERR, "ERROR: Cannot determine path of running kernel"); 616 args.pa_kernel = malloc(len + 1); 617 if (sysctlbyname("kern.bootfile", args.pa_kernel, &len, NULL, 0) == -1) 618 err(EX_OSERR, "ERROR: Cannot determine path of running kernel"); 619 620 /* 621 * The initial CPU mask specifies the root mask of this process 622 * which is usually all CPUs in the system. 623 */ 624 if (cpuset_getaffinity(CPU_LEVEL_ROOT, CPU_WHICH_PID, -1, 625 sizeof(rootmask), &rootmask) == -1) 626 err(EX_OSERR, "ERROR: Cannot determine the root set of CPUs"); 627 CPU_COPY(&rootmask, &cpumask); 628 629 while ((option = getopt(argc, argv, 630 "CD:EF:G:M:NO:P:R:S:TWa:c:df:gk:l:m:n:o:p:qr:s:t:vw:z:")) != -1) 631 switch (option) { 632 case 'a': /* Annotate + callgraph */ 633 args.pa_flags |= FLAG_DO_ANNOTATE; 634 args.pa_plugin = PMCSTAT_PL_ANNOTATE_CG; 635 graphfilename = optarg; 636 break; 637 638 case 'C': /* cumulative values */ 639 use_cumulative_counts = !use_cumulative_counts; 640 args.pa_required |= FLAG_HAS_COUNTING_PMCS; 641 break; 642 643 case 'c': /* CPU */ 644 if (optarg[0] == '*' && optarg[1] == '\0') 645 CPU_COPY(&rootmask, &cpumask); 646 else 647 pmcstat_get_cpumask(optarg, &cpumask); 648 649 args.pa_flags |= FLAGS_HAS_CPUMASK; 650 args.pa_required |= FLAG_HAS_SYSTEM_PMCS; 651 break; 652 653 case 'D': 654 if (stat(optarg, &sb) < 0) 655 err(EX_OSERR, "ERROR: Cannot stat \"%s\"", 656 optarg); 657 if (!S_ISDIR(sb.st_mode)) 658 errx(EX_USAGE, 659 "ERROR: \"%s\" is not a directory.", 660 optarg); 661 args.pa_samplesdir = optarg; 662 args.pa_flags |= FLAG_HAS_SAMPLESDIR; 663 args.pa_required |= FLAG_DO_GPROF; 664 break; 665 666 case 'd': /* toggle descendents */ 667 do_descendants = !do_descendants; 668 args.pa_required |= FLAG_HAS_PROCESS_PMCS; 669 break; 670 671 case 'F': /* produce a system-wide calltree */ 672 args.pa_flags |= FLAG_DO_CALLGRAPHS; 673 args.pa_plugin = PMCSTAT_PL_CALLTREE; 674 graphfilename = optarg; 675 break; 676 677 case 'f': /* plugins options */ 678 if (args.pa_plugin == PMCSTAT_PL_NONE) 679 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T."); 680 pmcstat_pluginconfigure_log(optarg); 681 break; 682 683 case 'G': /* produce a system-wide callgraph */ 684 args.pa_flags |= FLAG_DO_CALLGRAPHS; 685 args.pa_plugin = PMCSTAT_PL_CALLGRAPH; 686 graphfilename = optarg; 687 break; 688 689 case 'g': /* produce gprof compatible profiles */ 690 args.pa_flags |= FLAG_DO_GPROF; 691 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH; 692 args.pa_plugin = PMCSTAT_PL_GPROF; 693 break; 694 695 case 'k': /* pathname to the kernel */ 696 free(args.pa_kernel); 697 args.pa_kernel = strdup(optarg); 698 args.pa_required |= FLAG_DO_ANALYSIS; 699 args.pa_flags |= FLAG_HAS_KERNELPATH; 700 break; 701 702 case 'l': /* time duration in seconds */ 703 duration = strtod(optarg, &end); 704 if (*end != '\0' || duration <= 0) 705 errx(EX_USAGE, "ERROR: Illegal duration time " 706 "value \"%s\".", optarg); 707 args.pa_flags |= FLAG_HAS_DURATION; 708 args.pa_duration = duration; 709 break; 710 711 case 'm': 712 args.pa_flags |= FLAG_DO_ANNOTATE; 713 args.pa_plugin = PMCSTAT_PL_ANNOTATE; 714 graphfilename = optarg; 715 break; 716 717 case 'E': /* log process exit */ 718 do_logprocexit = !do_logprocexit; 719 args.pa_required |= (FLAG_HAS_PROCESS_PMCS | 720 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE); 721 break; 722 723 case 'M': /* mapfile */ 724 args.pa_mapfilename = optarg; 725 break; 726 727 case 'N': 728 do_callchain = !do_callchain; 729 args.pa_required |= FLAG_HAS_SAMPLING_PMCS; 730 break; 731 732 case 'p': /* process virtual counting PMC */ 733 case 's': /* system-wide counting PMC */ 734 case 'P': /* process virtual sampling PMC */ 735 case 'S': /* system-wide sampling PMC */ 736 if ((ev = malloc(sizeof(*ev))) == NULL) 737 errx(EX_SOFTWARE, "ERROR: Out of memory."); 738 739 switch (option) { 740 case 'p': ev->ev_mode = PMC_MODE_TC; break; 741 case 's': ev->ev_mode = PMC_MODE_SC; break; 742 case 'P': ev->ev_mode = PMC_MODE_TS; break; 743 case 'S': ev->ev_mode = PMC_MODE_SS; break; 744 } 745 746 if (option == 'P' || option == 'p') { 747 args.pa_flags |= FLAG_HAS_PROCESS_PMCS; 748 args.pa_required |= (FLAG_HAS_COMMANDLINE | 749 FLAG_HAS_TARGET); 750 } 751 752 if (option == 'P' || option == 'S') { 753 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS; 754 args.pa_required |= (FLAG_HAS_PIPE | 755 FLAG_HAS_OUTPUT_LOGFILE); 756 } 757 758 if (option == 'p' || option == 's') 759 args.pa_flags |= FLAG_HAS_COUNTING_PMCS; 760 761 if (option == 's' || option == 'S') 762 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS; 763 764 ev->ev_spec = strdup(optarg); 765 766 if (option == 'S' || option == 'P') 767 ev->ev_count = current_sampling_count; 768 else 769 ev->ev_count = -1; 770 771 if (option == 'S' || option == 's') 772 ev->ev_cpu = CPU_FFS(&cpumask) - 1; 773 else 774 ev->ev_cpu = PMC_CPU_ANY; 775 776 ev->ev_flags = 0; 777 if (do_callchain) 778 ev->ev_flags |= PMC_F_CALLCHAIN; 779 if (do_descendants) 780 ev->ev_flags |= PMC_F_DESCENDANTS; 781 if (do_logprocexit) 782 ev->ev_flags |= PMC_F_LOG_PROCEXIT; 783 if (do_logproccsw) 784 ev->ev_flags |= PMC_F_LOG_PROCCSW; 785 786 ev->ev_cumulative = use_cumulative_counts; 787 788 ev->ev_saved = 0LL; 789 ev->ev_pmcid = PMC_ID_INVALID; 790 791 /* extract event name */ 792 c = strcspn(optarg, ", \t"); 793 ev->ev_name = malloc(c + 1); 794 (void) strncpy(ev->ev_name, optarg, c); 795 *(ev->ev_name + c) = '\0'; 796 797 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next); 798 799 if (option == 's' || option == 'S') { 800 CPU_CLR(ev->ev_cpu, &cpumask); 801 pmcstat_clone_event_descriptor(ev, &cpumask); 802 CPU_SET(ev->ev_cpu, &cpumask); 803 } 804 805 break; 806 807 case 'n': /* sampling count */ 808 current_sampling_count = strtol(optarg, &end, 0); 809 if (*end != '\0' || current_sampling_count <= 0) 810 errx(EX_USAGE, 811 "ERROR: Illegal count value \"%s\".", 812 optarg); 813 args.pa_required |= FLAG_HAS_SAMPLING_PMCS; 814 break; 815 816 case 'o': /* outputfile */ 817 if (args.pa_printfile != NULL && 818 args.pa_printfile != stdout && 819 args.pa_printfile != stderr) 820 (void) fclose(args.pa_printfile); 821 if ((args.pa_printfile = fopen(optarg, "w")) == NULL) 822 errx(EX_OSERR, 823 "ERROR: cannot open \"%s\" for writing.", 824 optarg); 825 args.pa_flags |= FLAG_DO_PRINT; 826 break; 827 828 case 'O': /* sampling output */ 829 if (args.pa_outputpath) 830 errx(EX_USAGE, 831 "ERROR: option -O may only be specified once."); 832 args.pa_outputpath = optarg; 833 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE; 834 break; 835 836 case 'q': /* quiet mode */ 837 args.pa_verbosity = 0; 838 break; 839 840 case 'r': /* root FS path */ 841 args.pa_fsroot = optarg; 842 break; 843 844 case 'R': /* read an existing log file */ 845 if (args.pa_inputpath != NULL) 846 errx(EX_USAGE, 847 "ERROR: option -R may only be specified once."); 848 args.pa_inputpath = optarg; 849 if (args.pa_printfile == stderr) 850 args.pa_printfile = stdout; 851 args.pa_flags |= FLAG_READ_LOGFILE; 852 break; 853 854 case 't': /* target pid or process name */ 855 pmcstat_find_targets(optarg); 856 857 args.pa_flags |= FLAG_HAS_TARGET; 858 args.pa_required |= FLAG_HAS_PROCESS_PMCS; 859 break; 860 861 case 'T': /* top mode */ 862 args.pa_flags |= FLAG_DO_TOP; 863 args.pa_plugin = PMCSTAT_PL_CALLGRAPH; 864 args.pa_ctdumpinstr = 0; 865 args.pa_mergepmc = 1; 866 if (args.pa_printfile == stderr) 867 args.pa_printfile = stdout; 868 break; 869 870 case 'v': /* verbose */ 871 args.pa_verbosity++; 872 break; 873 874 case 'w': /* wait interval */ 875 interval = strtod(optarg, &end); 876 if (*end != '\0' || interval <= 0) 877 errx(EX_USAGE, 878 "ERROR: Illegal wait interval value \"%s\".", 879 optarg); 880 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL; 881 args.pa_interval = interval; 882 break; 883 884 case 'W': /* toggle LOG_CSW */ 885 do_logproccsw = !do_logproccsw; 886 args.pa_required |= (FLAG_HAS_PROCESS_PMCS | 887 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE); 888 break; 889 890 case 'z': 891 graphdepth = strtod(optarg, &end); 892 if (*end != '\0' || graphdepth <= 0) 893 errx(EX_USAGE, 894 "ERROR: Illegal callchain depth \"%s\".", 895 optarg); 896 args.pa_graphdepth = graphdepth; 897 args.pa_required |= FLAG_DO_CALLGRAPHS; 898 break; 899 900 case '?': 901 default: 902 pmcstat_show_usage(); 903 break; 904 905 } 906 907 args.pa_argc = (argc -= optind); 908 args.pa_argv = (argv += optind); 909 910 /* If we read from logfile and no specified CPU mask use 911 * the maximum CPU count. 912 */ 913 if ((args.pa_flags & FLAG_READ_LOGFILE) && 914 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0) 915 CPU_FILL(&cpumask); 916 917 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */ 918 919 if (argc) /* command line present */ 920 args.pa_flags |= FLAG_HAS_COMMANDLINE; 921 922 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS | 923 FLAG_DO_ANNOTATE | FLAG_DO_TOP)) 924 args.pa_flags |= FLAG_DO_ANALYSIS; 925 926 /* 927 * Check invocation syntax. 928 */ 929 930 /* disallow -O and -R together */ 931 if (args.pa_outputpath && args.pa_inputpath) 932 errx(EX_USAGE, 933 "ERROR: options -O and -R are mutually exclusive."); 934 935 /* disallow -T and -l together */ 936 if ((args.pa_flags & FLAG_HAS_DURATION) && 937 (args.pa_flags & FLAG_DO_TOP)) 938 errx(EX_USAGE, "ERROR: options -T and -l are mutually " 939 "exclusive."); 940 941 /* -a and -m require -R */ 942 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL) 943 errx(EX_USAGE, "ERROR: option %s requires an input file", 944 args.pa_plugin == PMCSTAT_PL_ANNOTATE ? "-m" : "-a"); 945 946 /* -m option is not allowed combined with -g or -G. */ 947 if (args.pa_flags & FLAG_DO_ANNOTATE && 948 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS)) 949 errx(EX_USAGE, 950 "ERROR: option -m and -g | -G are mutually exclusive"); 951 952 if (args.pa_flags & FLAG_READ_LOGFILE) { 953 errmsg = NULL; 954 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 955 errmsg = "a command line specification"; 956 else if (args.pa_flags & FLAG_HAS_TARGET) 957 errmsg = "option -t"; 958 else if (!STAILQ_EMPTY(&args.pa_events)) 959 errmsg = "a PMC event specification"; 960 if (errmsg) 961 errx(EX_USAGE, 962 "ERROR: option -R may not be used with %s.", 963 errmsg); 964 } else if (STAILQ_EMPTY(&args.pa_events)) 965 /* All other uses require a PMC spec. */ 966 pmcstat_show_usage(); 967 968 /* check for -t pid without a process PMC spec */ 969 if ((args.pa_required & FLAG_HAS_TARGET) && 970 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0) 971 errx(EX_USAGE, 972 "ERROR: option -t requires a process mode PMC to be specified." 973 ); 974 975 /* check for process-mode options without a command or -t pid */ 976 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) && 977 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0) 978 errx(EX_USAGE, 979 "ERROR: options -d, -E, -p, -P, and -W require a command line or target process." 980 ); 981 982 /* check for -p | -P without a target process of some sort */ 983 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) && 984 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0) 985 errx(EX_USAGE, 986 "ERROR: options -P and -p require a target process or a command line." 987 ); 988 989 /* check for process-mode options without a process-mode PMC */ 990 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) && 991 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0) 992 errx(EX_USAGE, 993 "ERROR: options -d, -E, and -W require a process mode PMC to be specified." 994 ); 995 996 /* check for -c cpu with no system mode PMCs or logfile. */ 997 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) && 998 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 && 999 (args.pa_flags & FLAG_READ_LOGFILE) == 0) 1000 errx(EX_USAGE, 1001 "ERROR: option -c requires at least one system mode PMC to be specified." 1002 ); 1003 1004 /* check for counting mode options without a counting PMC */ 1005 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) && 1006 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0) 1007 errx(EX_USAGE, 1008 "ERROR: options -C, -W and -o require at least one counting mode PMC to be specified." 1009 ); 1010 1011 /* check for sampling mode options without a sampling PMC spec */ 1012 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) && 1013 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0) 1014 errx(EX_USAGE, 1015 "ERROR: options -N, -n and -O require at least one sampling mode PMC to be specified." 1016 ); 1017 1018 /* check if -g/-G/-m/-T are being used correctly */ 1019 if ((args.pa_flags & FLAG_DO_ANALYSIS) && 1020 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE))) 1021 errx(EX_USAGE, 1022 "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified." 1023 ); 1024 1025 /* check if -O was spuriously specified */ 1026 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) && 1027 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) 1028 errx(EX_USAGE, 1029 "ERROR: option -O is used only with options -E, -P, -S and -W." 1030 ); 1031 1032 /* -k kernel path require -g/-G/-m/-T or -R */ 1033 if ((args.pa_flags & FLAG_HAS_KERNELPATH) && 1034 (args.pa_flags & FLAG_DO_ANALYSIS) == 0 && 1035 (args.pa_flags & FLAG_READ_LOGFILE) == 0) 1036 errx(EX_USAGE, "ERROR: option -k is only used with -g/-R/-m/-T."); 1037 1038 /* -D only applies to gprof output mode (-g) */ 1039 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) && 1040 (args.pa_flags & FLAG_DO_GPROF) == 0) 1041 errx(EX_USAGE, "ERROR: option -D is only used with -g."); 1042 1043 /* -M mapfile requires -g or -R */ 1044 if (args.pa_mapfilename != NULL && 1045 (args.pa_flags & FLAG_DO_GPROF) == 0 && 1046 (args.pa_flags & FLAG_READ_LOGFILE) == 0) 1047 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R."); 1048 1049 /* 1050 * Disallow textual output of sampling PMCs if counting PMCs 1051 * have also been asked for, mostly because the combined output 1052 * is difficult to make sense of. 1053 */ 1054 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) && 1055 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) && 1056 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0)) 1057 errx(EX_USAGE, 1058 "ERROR: option -O is required if counting and sampling PMCs are specified together." 1059 ); 1060 1061 /* 1062 * Check if 'kerneldir' refers to a file rather than a 1063 * directory. If so, use `dirname path` to determine the 1064 * kernel directory. 1065 */ 1066 (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot, 1067 args.pa_kernel); 1068 if (stat(buffer, &sb) < 0) 1069 err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"", 1070 buffer); 1071 if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode)) 1072 errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.", 1073 buffer); 1074 if (!S_ISDIR(sb.st_mode)) { 1075 tmp = args.pa_kernel; 1076 args.pa_kernel = strdup(dirname(args.pa_kernel)); 1077 free(tmp); 1078 (void) snprintf(buffer, sizeof(buffer), "%s%s", 1079 args.pa_fsroot, args.pa_kernel); 1080 if (stat(buffer, &sb) < 0) 1081 err(EX_OSERR, "ERROR: Cannot stat \"%s\"", 1082 buffer); 1083 if (!S_ISDIR(sb.st_mode)) 1084 errx(EX_USAGE, 1085 "ERROR: \"%s\" is not a directory.", 1086 buffer); 1087 } 1088 1089 /* 1090 * If we have a callgraph be created, select the outputfile. 1091 */ 1092 if (args.pa_flags & FLAG_DO_CALLGRAPHS) { 1093 if (strcmp(graphfilename, "-") == 0) 1094 args.pa_graphfile = args.pa_printfile; 1095 else { 1096 args.pa_graphfile = fopen(graphfilename, "w"); 1097 if (args.pa_graphfile == NULL) 1098 err(EX_OSERR, 1099 "ERROR: cannot open \"%s\" for writing", 1100 graphfilename); 1101 } 1102 } 1103 if (args.pa_flags & FLAG_DO_ANNOTATE) { 1104 args.pa_graphfile = fopen(graphfilename, "w"); 1105 if (args.pa_graphfile == NULL) 1106 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing", 1107 graphfilename); 1108 } 1109 1110 /* if we've been asked to process a log file, skip init */ 1111 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) { 1112 if (pmc_init() < 0) 1113 err(EX_UNAVAILABLE, 1114 "ERROR: Initialization of the pmc(3) library failed" 1115 ); 1116 1117 if ((npmc = pmc_npmc(0)) < 0) /* assume all CPUs are identical */ 1118 err(EX_OSERR, 1119 "ERROR: Cannot determine the number of PMCs on CPU %d", 1120 0); 1121 } 1122 1123 /* Allocate a kqueue */ 1124 if ((pmcstat_kq = kqueue()) < 0) 1125 err(EX_OSERR, "ERROR: Cannot allocate kqueue"); 1126 1127 /* Setup the logfile as the source. */ 1128 if (args.pa_flags & FLAG_READ_LOGFILE) { 1129 /* 1130 * Print the log in textual form if we haven't been 1131 * asked to generate profiling information. 1132 */ 1133 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0) 1134 args.pa_flags |= FLAG_DO_PRINT; 1135 1136 pmcstat_initialize_logging(); 1137 rfd = pmcstat_open_log(args.pa_inputpath, 1138 PMCSTAT_OPEN_FOR_READ); 1139 if ((args.pa_logparser = pmclog_open(rfd)) == NULL) 1140 err(EX_OSERR, "ERROR: Cannot create parser"); 1141 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0) 1142 err(EX_OSERR, "ERROR: fcntl(2) failed"); 1143 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD, 1144 0, 0, NULL); 1145 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1146 err(EX_OSERR, "ERROR: Cannot register kevent"); 1147 } 1148 /* 1149 * Configure the specified log file or setup a default log 1150 * consumer via a pipe. 1151 */ 1152 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) { 1153 if (args.pa_outputpath) 1154 args.pa_logfd = pmcstat_open_log(args.pa_outputpath, 1155 PMCSTAT_OPEN_FOR_WRITE); 1156 else { 1157 /* 1158 * process the log on the fly by reading it in 1159 * through a pipe. 1160 */ 1161 if (pipe(pipefd) < 0) 1162 err(EX_OSERR, "ERROR: pipe(2) failed"); 1163 1164 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0) 1165 err(EX_OSERR, "ERROR: fcntl(2) failed"); 1166 1167 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD, 1168 0, 0, NULL); 1169 1170 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1171 err(EX_OSERR, "ERROR: Cannot register kevent"); 1172 1173 args.pa_logfd = pipefd[WRITEPIPEFD]; 1174 1175 args.pa_flags |= FLAG_HAS_PIPE; 1176 if ((args.pa_flags & FLAG_DO_TOP) == 0) 1177 args.pa_flags |= FLAG_DO_PRINT; 1178 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]); 1179 } 1180 1181 if (pmc_configure_logfile(args.pa_logfd) < 0) 1182 err(EX_OSERR, "ERROR: Cannot configure log file"); 1183 } 1184 1185 /* remember to check for driver errors if we are sampling or logging */ 1186 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) || 1187 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE); 1188 1189 /* 1190 if (args.pa_flags & FLAG_READ_LOGFILE) { 1191 * Allocate PMCs. 1192 */ 1193 1194 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 1195 if (pmc_allocate(ev->ev_spec, ev->ev_mode, 1196 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid) < 0) 1197 err(EX_OSERR, 1198 "ERROR: Cannot allocate %s-mode pmc with specification \"%s\"", 1199 PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 1200 "system" : "process", ev->ev_spec); 1201 1202 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) && 1203 pmc_set(ev->ev_pmcid, ev->ev_count) < 0) 1204 err(EX_OSERR, 1205 "ERROR: Cannot set sampling count for PMC \"%s\"", 1206 ev->ev_name); 1207 } 1208 1209 /* compute printout widths */ 1210 STAILQ_FOREACH(ev, &args.pa_events, ev_next) { 1211 int counter_width; 1212 int display_width; 1213 int header_width; 1214 1215 (void) pmc_width(ev->ev_pmcid, &counter_width); 1216 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */ 1217 display_width = (int) floor(counter_width / 3.32193) + 1; 1218 1219 if (PMC_IS_SYSTEM_MODE(ev->ev_mode)) 1220 header_width += 3; /* 2 digit CPU number + '/' */ 1221 1222 if (header_width > display_width) { 1223 ev->ev_fieldskip = 0; 1224 ev->ev_fieldwidth = header_width; 1225 } else { 1226 ev->ev_fieldskip = display_width - 1227 header_width; 1228 ev->ev_fieldwidth = display_width; 1229 } 1230 } 1231 1232 /* 1233 * If our output is being set to a terminal, register a handler 1234 * for window size changes. 1235 */ 1236 1237 if (isatty(fileno(args.pa_printfile))) { 1238 1239 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0) 1240 err(EX_OSERR, "ERROR: Cannot determine window size"); 1241 1242 pmcstat_displayheight = ws.ws_row - 1; 1243 pmcstat_displaywidth = ws.ws_col - 1; 1244 1245 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1246 1247 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1248 err(EX_OSERR, 1249 "ERROR: Cannot register kevent for SIGWINCH"); 1250 1251 args.pa_toptty = 1; 1252 } 1253 1254 /* 1255 * Listen to key input in top mode. 1256 */ 1257 if (args.pa_flags & FLAG_DO_TOP) { 1258 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL); 1259 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1260 err(EX_OSERR, "ERROR: Cannot register kevent"); 1261 } 1262 1263 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1264 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1265 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT"); 1266 1267 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1268 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1269 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO"); 1270 1271 /* 1272 * An exec() failure of a forked child is signalled by the 1273 * child sending the parent a SIGCHLD. We don't register an 1274 * actual signal handler for SIGCHLD, but instead use our 1275 * kqueue to pick up the signal. 1276 */ 1277 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); 1278 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1279 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD"); 1280 1281 /* 1282 * Setup a timer if we have counting mode PMCs needing to be printed or 1283 * top mode plugin is active. 1284 */ 1285 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) && 1286 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) || 1287 (args.pa_flags & FLAG_DO_TOP)) { 1288 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0, 1289 args.pa_interval * 1000, NULL); 1290 1291 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1292 err(EX_OSERR, 1293 "ERROR: Cannot register kevent for timer"); 1294 } 1295 1296 /* 1297 * Setup a duration timer if we have sampling mode PMCs and 1298 * a duration time is set 1299 */ 1300 if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) && 1301 (args.pa_flags & FLAG_HAS_DURATION)) { 1302 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0, 1303 args.pa_duration * 1000, NULL); 1304 1305 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) 1306 err(EX_OSERR, "ERROR: Cannot register kevent for " 1307 "time duration"); 1308 } 1309 1310 /* attach PMCs to the target process, starting it if specified */ 1311 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 1312 pmcstat_create_process(); 1313 1314 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0) 1315 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics"); 1316 1317 /* Attach process pmcs to the target process. */ 1318 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) { 1319 if (SLIST_EMPTY(&args.pa_targets)) 1320 errx(EX_DATAERR, 1321 "ERROR: No matching target processes."); 1322 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS) 1323 pmcstat_attach_pmcs(); 1324 1325 if (pmcstat_kvm) { 1326 kvm_close(pmcstat_kvm); 1327 pmcstat_kvm = NULL; 1328 } 1329 } 1330 1331 /* start the pmcs */ 1332 pmcstat_start_pmcs(); 1333 1334 /* start the (commandline) process if needed */ 1335 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 1336 pmcstat_start_process(); 1337 1338 /* initialize logging */ 1339 pmcstat_initialize_logging(); 1340 1341 /* Handle SIGINT using the kqueue loop */ 1342 sa.sa_handler = SIG_IGN; 1343 sa.sa_flags = 0; 1344 (void) sigemptyset(&sa.sa_mask); 1345 1346 if (sigaction(SIGINT, &sa, NULL) < 0) 1347 err(EX_OSERR, "ERROR: Cannot install signal handler"); 1348 1349 /* 1350 * Setup the top mode display. 1351 */ 1352 if (args.pa_flags & FLAG_DO_TOP) { 1353 args.pa_flags &= ~FLAG_DO_PRINT; 1354 1355 if (args.pa_toptty) { 1356 /* 1357 * Init ncurses. 1358 */ 1359 initscr(); 1360 if(has_colors() == TRUE) { 1361 args.pa_topcolor = 1; 1362 start_color(); 1363 use_default_colors(); 1364 pair_content(0, &cf, &cb); 1365 init_pair(1, COLOR_RED, cb); 1366 init_pair(2, COLOR_YELLOW, cb); 1367 init_pair(3, COLOR_GREEN, cb); 1368 } 1369 cbreak(); 1370 noecho(); 1371 nonl(); 1372 nodelay(stdscr, 1); 1373 intrflush(stdscr, FALSE); 1374 keypad(stdscr, TRUE); 1375 clear(); 1376 /* Get terminal width / height with ncurses. */ 1377 getmaxyx(stdscr, 1378 pmcstat_displayheight, pmcstat_displaywidth); 1379 pmcstat_displayheight--; pmcstat_displaywidth--; 1380 atexit(pmcstat_topexit); 1381 } 1382 } 1383 1384 /* 1385 * loop till either the target process (if any) exits, or we 1386 * are killed by a SIGINT or we reached the time duration. 1387 */ 1388 runstate = PMCSTAT_RUNNING; 1389 do_print = do_read = 0; 1390 do { 1391 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) { 1392 if (errno != EINTR) 1393 err(EX_OSERR, "ERROR: kevent failed"); 1394 else 1395 continue; 1396 } 1397 1398 if (kev.flags & EV_ERROR) 1399 errc(EX_OSERR, kev.data, "ERROR: kevent failed"); 1400 1401 switch (kev.filter) { 1402 case EVFILT_PROC: /* target has exited */ 1403 runstate = pmcstat_close_log(); 1404 do_print = 1; 1405 break; 1406 1407 case EVFILT_READ: /* log file data is present */ 1408 if (kev.ident == (unsigned)fileno(stdin) && 1409 (args.pa_flags & FLAG_DO_TOP)) { 1410 if (pmcstat_keypress_log()) 1411 runstate = pmcstat_close_log(); 1412 } else { 1413 do_read = 0; 1414 runstate = pmcstat_process_log(); 1415 } 1416 break; 1417 1418 case EVFILT_SIGNAL: 1419 if (kev.ident == SIGCHLD) { 1420 /* 1421 * The child process sends us a 1422 * SIGCHLD if its exec() failed. We 1423 * wait for it to exit and then exit 1424 * ourselves. 1425 */ 1426 (void) wait(&c); 1427 runstate = PMCSTAT_FINISHED; 1428 } else if (kev.ident == SIGIO) { 1429 /* 1430 * We get a SIGIO if a PMC loses all 1431 * of its targets, or if logfile 1432 * writes encounter an error. 1433 */ 1434 runstate = pmcstat_close_log(); 1435 do_print = 1; /* print PMCs at exit */ 1436 } else if (kev.ident == SIGINT) { 1437 /* Kill the child process if we started it */ 1438 if (args.pa_flags & FLAG_HAS_COMMANDLINE) 1439 pmcstat_kill_process(); 1440 runstate = pmcstat_close_log(); 1441 } else if (kev.ident == SIGWINCH) { 1442 if (ioctl(fileno(args.pa_printfile), 1443 TIOCGWINSZ, &ws) < 0) 1444 err(EX_OSERR, 1445 "ERROR: Cannot determine window size"); 1446 pmcstat_displayheight = ws.ws_row - 1; 1447 pmcstat_displaywidth = ws.ws_col - 1; 1448 } else 1449 assert(0); 1450 1451 break; 1452 1453 case EVFILT_TIMER: 1454 /* time duration reached, exit */ 1455 if (args.pa_flags & FLAG_HAS_DURATION) { 1456 runstate = PMCSTAT_FINISHED; 1457 break; 1458 } 1459 /* print out counting PMCs */ 1460 if ((args.pa_flags & FLAG_DO_TOP) && 1461 pmc_flush_logfile() == 0) 1462 do_read = 1; 1463 do_print = 1; 1464 break; 1465 1466 } 1467 1468 if (do_print && !do_read) { 1469 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) { 1470 pmcstat_print_pmcs(); 1471 if (runstate == PMCSTAT_FINISHED && 1472 /* final newline */ 1473 (args.pa_flags & FLAG_DO_PRINT) == 0) 1474 (void) fprintf(args.pa_printfile, "\n"); 1475 } 1476 if (args.pa_flags & FLAG_DO_TOP) 1477 pmcstat_display_log(); 1478 do_print = 0; 1479 } 1480 1481 } while (runstate != PMCSTAT_FINISHED); 1482 1483 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) { 1484 pmcstat_topexit(); 1485 args.pa_toptty = 0; 1486 } 1487 1488 /* flush any pending log entries */ 1489 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE)) 1490 pmc_close_logfile(); 1491 1492 pmcstat_cleanup(); 1493 1494 free(args.pa_kernel); 1495 1496 /* check if the driver lost any samples or events */ 1497 if (check_driver_stats) { 1498 if (pmc_get_driver_stats(&ds_end) < 0) 1499 err(EX_OSERR, 1500 "ERROR: Cannot retrieve driver statistics"); 1501 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull && 1502 args.pa_verbosity > 0) 1503 warnx("WARNING: some samples were dropped.\n" 1504 "Please consider tuning the \"kern.hwpmc.nsamples\" tunable." 1505 ); 1506 if (ds_start.pm_buffer_requests_failed != 1507 ds_end.pm_buffer_requests_failed && 1508 args.pa_verbosity > 0) 1509 warnx("WARNING: some events were discarded.\n" 1510 "Please consider tuning the \"kern.hwpmc.nbuffers\" tunable." 1511 ); 1512 } 1513 1514 exit(EX_OK); 1515 } 1516