2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003-2008, Joseph Koshy
5 * Copyright (c) 2007 The FreeBSD Foundation
8 * Portions of this software were developed by A. Joseph Koshy under
9 * sponsorship from the FreeBSD Foundation and Google, Inc.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
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>
42 #include <sys/sysctl.h>
44 #include <sys/ttycom.h>
70 #include <libpmcstat.h>
75 * A given invocation of pmcstat(8) can manage multiple PMCs of both
76 * the system-wide and per-process variety. Each of these could be in
77 * 'counting mode' or in 'sampling mode'.
79 * For 'counting mode' PMCs, pmcstat(8) will periodically issue a
80 * pmc_read() at the configured time interval and print out the value
81 * of the requested PMCs.
83 * For 'sampling mode' PMCs it can log to a file for offline analysis,
84 * or can analyse sampling data "on the fly", either by converting
85 * samples to printed textual form or by creating gprof(1) compatible
86 * profiles, one per program executed. When creating gprof(1)
87 * profiles it can optionally merge entries from multiple processes
88 * for a given executable into a single profile file.
90 * pmcstat(8) can also execute a command line and attach PMCs to the
91 * resulting child process. The protocol used is as follows:
93 * - parent creates a socketpair for two way communication and
99 * - Wait for childs token.
101 * - Awaits signal to start.
102 * - Attaches PMCs to the child's pid
103 * and starts them. Sets up
104 * monitoring for the child.
105 * - Signals child to start.
106 * - Receives signal, attempts exec().
108 * After this point normal processing can happen.
113 int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT;
114 int pmcstat_displaywidth = DEFAULT_DISPLAY_WIDTH;
115 static int pmcstat_sockpair[NSOCKPAIRFD];
116 static int pmcstat_kq;
117 static kvm_t *pmcstat_kvm;
118 static struct kinfo_proc *pmcstat_plist;
119 struct pmcstat_args args;
120 static bool libpmc_initialized = false;
123 pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask)
133 cpu = strtol(s, &end, 0);
134 if (cpu < 0 || end == s)
136 "ERROR: Illegal CPU specification \"%s\".",
138 CPU_SET(cpu, cpumask);
139 s = end + strspn(end, ", \t");
141 assert(!CPU_EMPTY(cpumask));
145 pmcstat_cleanup(void)
147 struct pmcstat_ev *ev;
149 /* release allocated PMCs. */
150 STAILQ_FOREACH(ev, &args.pa_events, ev_next)
151 if (ev->ev_pmcid != PMC_ID_INVALID) {
152 if (pmc_stop(ev->ev_pmcid) < 0)
154 "ERROR: cannot stop pmc 0x%x \"%s\"",
155 ev->ev_pmcid, ev->ev_name);
156 if (pmc_release(ev->ev_pmcid) < 0)
158 "ERROR: cannot release pmc 0x%x \"%s\"",
159 ev->ev_pmcid, ev->ev_name);
162 /* de-configure the log file if present. */
163 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE))
164 (void) pmc_configure_logfile(-1);
166 if (args.pa_logparser) {
167 pmclog_close(args.pa_logparser);
168 args.pa_logparser = NULL;
171 pmcstat_log_shutdown_logging();
175 pmcstat_find_targets(const char *spec)
177 int n, nproc, pid, rv;
178 struct pmcstat_target *pt;
179 char errbuf[_POSIX2_LINE_MAX], *end;
180 static struct kinfo_proc *kp;
184 /* First check if we've been given a process id. */
185 pid = strtol(spec, &end, 0);
186 if (end != spec && pid >= 0) {
187 if ((pt = malloc(sizeof(*pt))) == NULL)
190 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
194 /* Otherwise treat arg as a regular expression naming processes. */
195 if (pmcstat_kvm == NULL) {
196 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0,
198 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"",
200 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC,
202 err(EX_OSERR, "ERROR: Cannot get process list: %s",
203 kvm_geterr(pmcstat_kvm));
207 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) {
208 regerror(rv, ®, errbuf, sizeof(errbuf));
209 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s",
213 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) {
214 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) {
215 if ((pt = malloc(sizeof(*pt))) == NULL)
217 pt->pt_pid = kp->ki_pid;
218 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
219 } else if (rv != REG_NOMATCH) {
220 regerror(rv, ®, errbuf, sizeof(errbuf));
221 errx(EX_SOFTWARE, "ERROR: Regex evalation failed: %s",
231 errx(EX_SOFTWARE, "Out of memory.");
236 pmcstat_kill_process(void)
238 struct pmcstat_target *pt;
240 assert(args.pa_flags & FLAG_HAS_COMMANDLINE);
243 * If a command line was specified, it would be the very first
244 * in the list, before any other processes specified by -t.
246 pt = SLIST_FIRST(&args.pa_targets);
249 if (kill(pt->pt_pid, SIGINT) != 0)
250 err(EX_OSERR, "ERROR: cannot signal child process");
254 pmcstat_start_pmcs(void)
256 struct pmcstat_ev *ev;
258 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
260 assert(ev->ev_pmcid != PMC_ID_INVALID);
262 if (pmc_start(ev->ev_pmcid) < 0) {
263 warn("ERROR: Cannot start pmc 0x%x \"%s\"",
264 ev->ev_pmcid, ev->ev_name);
272 pmcstat_print_headers(void)
274 struct pmcstat_ev *ev;
277 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX);
279 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
280 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
283 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
285 if (ev->ev_fieldskip != 0)
286 (void) fprintf(args.pa_printfile, "%*s",
287 ev->ev_fieldskip, "");
288 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2;
291 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ",
292 ev->ev_cpu, w-3, ev->ev_name);
294 (void) fprintf(args.pa_printfile, "p/%*s ", w,
298 (void) fflush(args.pa_printfile);
302 pmcstat_print_counters(void)
305 struct pmcstat_ev *ev;
308 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
310 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
312 /* skip sampling mode counters */
313 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
316 if (pmc_read(ev->ev_pmcid, &value) < 0)
317 err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"",
320 (void) fprintf(args.pa_printfile, "%*ju ",
321 ev->ev_fieldwidth + extra_width,
322 (uintmax_t) ev->ev_cumulative ? value :
323 (value - ev->ev_saved));
325 if (ev->ev_cumulative == 0)
326 ev->ev_saved = value;
330 (void) fflush(args.pa_printfile);
338 pmcstat_print_pmcs(void)
340 static int linecount = 0;
342 /* check if we need to print a header line */
343 if (++linecount > pmcstat_displayheight) {
344 (void) fprintf(args.pa_printfile, "\n");
348 pmcstat_print_headers();
349 (void) fprintf(args.pa_printfile, "\n");
351 pmcstat_print_counters();
355 pmcstat_show_usage(void)
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)"
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 \t\t merged user kernel stack capture\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 "
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"
405 * At exit handler for top mode
409 pmcstat_topexit(void)
423 libpmc_initialize(int *npmc)
426 if (libpmc_initialized)
429 err(EX_UNAVAILABLE, "ERROR: Initialization of the pmc(3)"
432 /* assume all CPUs are identical */
433 if ((*npmc = pmc_npmc(0)) < 0)
434 err(EX_OSERR, "ERROR: Cannot determine the number of PMCs on "
436 libpmc_initialized = true;
443 main(int argc, char **argv)
445 cpuset_t cpumask, dommask, rootmask;
449 int c, check_driver_stats;
450 int do_callchain, do_descendants, do_logproccsw, do_logprocexit;
451 int do_print, do_read, do_listcounters, do_descr, domains;
456 int use_cumulative_counts;
458 uint64_t current_sampling_count;
459 char *end, *tmp, *event;
460 const char *errmsg, *graphfilename;
461 enum pmcstat_state runstate;
462 struct pmc_driverstats ds_start, ds_end;
463 struct pmcstat_ev *ev;
468 char buffer[PATH_MAX];
471 check_driver_stats = 0;
472 current_sampling_count = 0;
481 use_cumulative_counts = 0;
483 args.pa_required = 0;
485 args.pa_verbosity = 1;
488 args.pa_samplesdir = ".";
489 args.pa_printfile = stderr;
490 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
491 args.pa_graphfile = NULL;
492 args.pa_interval = DEFAULT_WAIT_INTERVAL;
493 args.pa_mapfilename = NULL;
494 args.pa_inputpath = NULL;
495 args.pa_outputpath = NULL;
496 args.pa_pplugin = PMCSTAT_PL_NONE;
497 args.pa_plugin = PMCSTAT_PL_NONE;
498 args.pa_ctdumpinstr = 1;
499 args.pa_topmode = PMCSTAT_TOP_DELTA;
501 args.pa_topcolor = 0;
502 args.pa_mergepmc = 0;
503 args.pa_duration = 0.0;
504 STAILQ_INIT(&args.pa_events);
505 SLIST_INIT(&args.pa_targets);
506 bzero(&ds_start, sizeof(ds_start));
507 bzero(&ds_end, sizeof(ds_end));
514 /* Default to using the running system kernel. */
516 if (sysctlbyname("kern.bootfile", NULL, &len, NULL, 0) == -1)
517 err(EX_OSERR, "ERROR: Cannot determine path of running kernel");
518 args.pa_kernel = malloc(len);
519 if (args.pa_kernel == NULL)
520 errx(EX_SOFTWARE, "ERROR: Out of memory.");
521 if (sysctlbyname("kern.bootfile", args.pa_kernel, &len, NULL, 0) == -1)
522 err(EX_OSERR, "ERROR: Cannot determine path of running kernel");
523 len = sizeof(domains);
524 if (sysctlbyname("vm.ndomains", &domains, &len, NULL, 0) == -1)
525 err(EX_OSERR, "ERROR: Cannot get number of domains");
528 * The initial CPU mask specifies the root mask of this process
529 * which is usually all CPUs in the system.
531 if (cpuset_getaffinity(CPU_LEVEL_ROOT, CPU_WHICH_PID, -1,
532 sizeof(rootmask), &rootmask) == -1)
533 err(EX_OSERR, "ERROR: Cannot determine the root set of CPUs");
534 CPU_COPY(&rootmask, &cpumask);
536 while ((option = getopt(argc, argv,
537 "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)
540 args.pa_flags |= FLAG_SKIP_TOP_FN_RES;
543 case 'a': /* Annotate + callgraph */
544 args.pa_flags |= FLAG_DO_ANNOTATE;
545 args.pa_plugin = PMCSTAT_PL_ANNOTATE_CG;
546 graphfilename = optarg;
549 case 'C': /* cumulative values */
550 use_cumulative_counts = !use_cumulative_counts;
551 args.pa_required |= FLAG_HAS_COUNTING_PMCS;
555 if (optarg[0] == '*' && optarg[1] == '\0')
556 CPU_COPY(&rootmask, &cpumask);
558 pmcstat_get_cpumask(optarg, &cpumask);
560 args.pa_flags |= FLAGS_HAS_CPUMASK;
561 args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
565 if (stat(optarg, &sb) < 0)
566 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
568 if (!S_ISDIR(sb.st_mode))
570 "ERROR: \"%s\" is not a directory.",
572 args.pa_samplesdir = optarg;
573 args.pa_flags |= FLAG_HAS_SAMPLESDIR;
574 args.pa_required |= FLAG_DO_GPROF;
577 case 'd': /* toggle descendents */
578 do_descendants = !do_descendants;
579 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
582 case 'E': /* log process exit */
583 do_logprocexit = !do_logprocexit;
584 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
585 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
588 case 'e': /* wide gprof metrics */
589 args.pa_flags |= FLAG_DO_WIDE_GPROF_HC;
592 case 'F': /* produce a system-wide calltree */
593 args.pa_flags |= FLAG_DO_CALLGRAPHS;
594 args.pa_plugin = PMCSTAT_PL_CALLTREE;
595 graphfilename = optarg;
598 case 'f': /* plugins options */
599 if (args.pa_plugin == PMCSTAT_PL_NONE)
600 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T.");
601 pmcstat_pluginconfigure_log(optarg);
604 case 'G': /* produce a system-wide callgraph */
605 args.pa_flags |= FLAG_DO_CALLGRAPHS;
606 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
607 graphfilename = optarg;
610 case 'g': /* produce gprof compatible profiles */
611 args.pa_flags |= FLAG_DO_GPROF;
612 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH;
613 args.pa_plugin = PMCSTAT_PL_GPROF;
617 args.pa_flags |= FLAG_FILTER_THREAD_ID;
618 args.pa_tid = strtol(optarg, &end, 0);
622 args.pa_flags |= FLAG_SHOW_OFFSET;
625 case 'k': /* pathname to the kernel */
626 free(args.pa_kernel);
627 args.pa_kernel = strdup(optarg);
628 if (args.pa_kernel == NULL)
629 errx(EX_SOFTWARE, "ERROR: Out of memory");
630 args.pa_required |= FLAG_DO_ANALYSIS;
631 args.pa_flags |= FLAG_HAS_KERNELPATH;
638 case 'l': /* time duration in seconds */
639 duration = strtod(optarg, &end);
640 if (*end != '\0' || duration <= 0)
641 errx(EX_USAGE, "ERROR: Illegal duration time "
642 "value \"%s\".", optarg);
643 args.pa_flags |= FLAG_HAS_DURATION;
644 args.pa_duration = duration;
648 args.pa_flags |= FLAG_DO_ANNOTATE;
649 args.pa_plugin = PMCSTAT_PL_ANNOTATE;
650 graphfilename = optarg;
653 case 'M': /* mapfile */
654 args.pa_mapfilename = optarg;
658 do_callchain = !do_callchain;
659 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
662 case 'p': /* process virtual counting PMC */
663 case 's': /* system-wide counting PMC */
664 case 'P': /* process virtual sampling PMC */
665 case 'S': /* system-wide sampling PMC */
667 if ((ev = malloc(sizeof(*ev))) == NULL)
668 errx(EX_SOFTWARE, "ERROR: Out of memory.");
671 case 'p': ev->ev_mode = PMC_MODE_TC; break;
672 case 's': ev->ev_mode = PMC_MODE_SC; break;
673 case 'P': ev->ev_mode = PMC_MODE_TS; break;
674 case 'S': ev->ev_mode = PMC_MODE_SS; break;
677 if (option == 'P' || option == 'p') {
678 args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
679 args.pa_required |= (FLAG_HAS_COMMANDLINE |
683 if (option == 'P' || option == 'S') {
684 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
685 args.pa_required |= (FLAG_HAS_PIPE |
686 FLAG_HAS_OUTPUT_LOGFILE);
689 if (option == 'p' || option == 's')
690 args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
692 if (option == 's' || option == 'S')
693 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
695 ev->ev_spec = strdup(optarg);
696 if (ev->ev_spec == NULL)
697 errx(EX_SOFTWARE, "ERROR: Out of memory.");
699 if (option == 'S' || option == 'P')
700 ev->ev_count = current_sampling_count ? current_sampling_count : pmc_pmu_sample_rate_get(ev->ev_spec);
704 if (option == 'S' || option == 's')
705 ev->ev_cpu = CPU_FFS(&cpumask) - 1;
707 ev->ev_cpu = PMC_CPU_ANY;
711 ev->ev_flags |= PMC_F_CALLCHAIN;
713 ev->ev_flags |= PMC_F_USERCALLCHAIN;
716 ev->ev_flags |= PMC_F_DESCENDANTS;
718 ev->ev_flags |= PMC_F_LOG_PROCEXIT;
720 ev->ev_flags |= PMC_F_LOG_PROCCSW;
722 ev->ev_cumulative = use_cumulative_counts;
725 ev->ev_pmcid = PMC_ID_INVALID;
727 /* extract event name */
728 c = strcspn(optarg, ", \t");
729 ev->ev_name = malloc(c + 1);
730 if (ev->ev_name == NULL)
731 errx(EX_SOFTWARE, "ERROR: Out of memory.");
732 (void) strncpy(ev->ev_name, optarg, c);
733 *(ev->ev_name + c) = '\0';
734 libpmc_initialize(&npmc);
735 if (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) {
736 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
737 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid,
739 err(EX_OSERR, "ERROR: Cannot allocate "
740 "system-mode pmc with specification"
741 " \"%s\"", ev->ev_spec);
742 if (pmc_capabilities(ev->ev_pmcid, &caps)) {
743 pmc_release(ev->ev_pmcid);
744 err(EX_OSERR, "ERROR: Cannot get pmc "
750 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next);
752 if ((caps & PMC_CAP_SYSWIDE) == PMC_CAP_SYSWIDE)
754 if ((caps & PMC_CAP_DOMWIDE) == PMC_CAP_DOMWIDE) {
757 * Get number of domains and allocate one
759 * First already allocated.
761 for (i = 1; i < domains; i++) {
763 cpuset_getaffinity(CPU_LEVEL_WHICH,
764 CPU_WHICH_DOMAIN, i, sizeof(dommask),
766 CPU_SET(CPU_FFS(&dommask) - 1, &cpumask);
768 args.pa_flags |= FLAGS_HAS_CPUMASK;
770 if (option == 's' || option == 'S') {
771 CPU_CLR(ev->ev_cpu, &cpumask);
772 pmc_id_t saved_pmcid = ev->ev_pmcid;
773 ev->ev_pmcid = PMC_ID_INVALID;
774 pmcstat_clone_event_descriptor(ev, &cpumask, &args);
775 ev->ev_pmcid = saved_pmcid;
776 CPU_SET(ev->ev_cpu, &cpumask);
781 case 'n': /* sampling count */
782 current_sampling_count = strtol(optarg, &end, 0);
783 if (*end != '\0' || current_sampling_count <= 0)
785 "ERROR: Illegal count value \"%s\".",
787 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
790 case 'o': /* outputfile */
791 if (args.pa_printfile != NULL &&
792 args.pa_printfile != stdout &&
793 args.pa_printfile != stderr)
794 (void) fclose(args.pa_printfile);
795 if ((args.pa_printfile = fopen(optarg, "w")) == NULL)
797 "ERROR: cannot open \"%s\" for writing.",
799 args.pa_flags |= FLAG_DO_PRINT;
802 case 'O': /* sampling output */
803 if (args.pa_outputpath)
805 "ERROR: option -O may only be specified once.");
806 args.pa_outputpath = optarg;
807 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE;
810 case 'q': /* quiet mode */
811 args.pa_verbosity = 0;
814 case 'r': /* root FS path */
815 args.pa_fsroot = optarg;
818 case 'R': /* read an existing log file */
819 if (args.pa_inputpath != NULL)
821 "ERROR: option -R may only be specified once.");
822 args.pa_inputpath = optarg;
823 if (args.pa_printfile == stderr)
824 args.pa_printfile = stdout;
825 args.pa_flags |= FLAG_READ_LOGFILE;
828 case 't': /* target pid or process name */
829 pmcstat_find_targets(optarg);
831 args.pa_flags |= FLAG_HAS_TARGET;
832 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
835 case 'T': /* top mode */
836 args.pa_flags |= FLAG_DO_TOP;
837 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
838 args.pa_ctdumpinstr = 0;
839 args.pa_mergepmc = 1;
840 if (args.pa_printfile == stderr)
841 args.pa_printfile = stdout;
848 case 'U': /* toggle user-space callchain capture */
849 do_userspace = !do_userspace;
850 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
852 case 'v': /* verbose */
856 case 'w': /* wait interval */
857 interval = strtod(optarg, &end);
858 if (*end != '\0' || interval <= 0)
860 "ERROR: Illegal wait interval value \"%s\".",
862 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
863 args.pa_interval = interval;
866 case 'W': /* toggle LOG_CSW */
867 do_logproccsw = !do_logproccsw;
868 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
869 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
873 graphdepth = strtod(optarg, &end);
874 if (*end != '\0' || graphdepth <= 0)
876 "ERROR: Illegal callchain depth \"%s\".",
878 args.pa_graphdepth = graphdepth;
879 args.pa_required |= FLAG_DO_CALLGRAPHS;
884 pmcstat_show_usage();
888 if ((do_listcounters | do_descr) &&
889 pmc_pmu_enabled() == 0)
890 errx(EX_USAGE, "pmu features not supported on host or hwpmc not loaded");
891 if (do_listcounters) {
892 pmc_pmu_print_counters(NULL);
893 } else if (do_descr) {
894 pmc_pmu_print_counter_desc(event);
896 if (do_listcounters | do_descr)
899 args.pa_argc = (argc -= optind);
900 args.pa_argv = (argv += optind);
902 /* If we read from logfile and no specified CPU mask use
903 * the maximum CPU count.
905 if ((args.pa_flags & FLAG_READ_LOGFILE) &&
906 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0)
909 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
911 if (argc) /* command line present */
912 args.pa_flags |= FLAG_HAS_COMMANDLINE;
914 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS |
915 FLAG_DO_ANNOTATE | FLAG_DO_TOP))
916 args.pa_flags |= FLAG_DO_ANALYSIS;
919 * Check invocation syntax.
922 /* disallow -O and -R together */
923 if (args.pa_outputpath && args.pa_inputpath)
925 "ERROR: options -O and -R are mutually exclusive.");
927 /* disallow -T and -l together */
928 if ((args.pa_flags & FLAG_HAS_DURATION) &&
929 (args.pa_flags & FLAG_DO_TOP))
930 errx(EX_USAGE, "ERROR: options -T and -l are mutually "
933 /* -a and -m require -R */
934 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL)
935 errx(EX_USAGE, "ERROR: option %s requires an input file",
936 args.pa_plugin == PMCSTAT_PL_ANNOTATE ? "-m" : "-a");
938 /* -m option is not allowed combined with -g or -G. */
939 if (args.pa_flags & FLAG_DO_ANNOTATE &&
940 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
942 "ERROR: option -m and -g | -G are mutually exclusive");
944 if (args.pa_flags & FLAG_READ_LOGFILE) {
946 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
947 errmsg = "a command line specification";
948 else if (args.pa_flags & FLAG_HAS_TARGET)
949 errmsg = "option -t";
950 else if (!STAILQ_EMPTY(&args.pa_events))
951 errmsg = "a PMC event specification";
954 "ERROR: option -R may not be used with %s.",
956 } else if (STAILQ_EMPTY(&args.pa_events))
957 /* All other uses require a PMC spec. */
958 pmcstat_show_usage();
960 /* check for -t pid without a process PMC spec */
961 if ((args.pa_flags & FLAG_HAS_TARGET) &&
962 (args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
963 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
965 "ERROR: option -t requires a process mode PMC to be specified."
968 /* check for process-mode options without a command or -t pid */
969 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
970 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
972 "ERROR: options -d, -E, -p, -P, and -W require a command line or target process."
975 /* check for -p | -P without a target process of some sort */
976 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) &&
977 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
979 "ERROR: options -P and -p require a target process or a command line."
982 /* check for process-mode options without a process-mode PMC */
983 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
984 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
986 "ERROR: options -d, -E, and -W require a process mode PMC to be specified."
989 /* check for -c cpu with no system mode PMCs or logfile. */
990 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
991 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
992 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
994 "ERROR: option -c requires at least one system mode PMC to be specified."
997 /* check for counting mode options without a counting PMC */
998 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
999 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
1001 "ERROR: options -C, -W and -o require at least one counting mode PMC to be specified."
1004 /* check for sampling mode options without a sampling PMC spec */
1005 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
1006 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
1008 "ERROR: options -N, -n and -O require at least one sampling mode PMC to be specified."
1011 /* check if -g/-G/-m/-T are being used correctly */
1012 if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
1013 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
1015 "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified."
1018 /* check if -e was specified without -g */
1019 if ((args.pa_flags & FLAG_DO_WIDE_GPROF_HC) &&
1020 !(args.pa_flags & FLAG_DO_GPROF))
1022 "ERROR: option -e requires gprof mode to be specified."
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)
1029 "ERROR: option -O is used only with options -E, -P, -S and -W."
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.");
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.");
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.");
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.
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))
1058 "ERROR: option -O is required if counting and sampling PMCs are specified together."
1062 * Check if 'kerneldir' refers to a file rather than a
1063 * directory. If so, use `dirname path` to determine the
1066 (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot,
1068 if (stat(buffer, &sb) < 0)
1069 err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"",
1071 if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode))
1072 errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.",
1074 if (!S_ISDIR(sb.st_mode)) {
1075 tmp = args.pa_kernel;
1076 args.pa_kernel = strdup(dirname(args.pa_kernel));
1077 if (args.pa_kernel == NULL)
1078 errx(EX_SOFTWARE, "ERROR: Out of memory");
1080 (void) snprintf(buffer, sizeof(buffer), "%s%s",
1081 args.pa_fsroot, args.pa_kernel);
1082 if (stat(buffer, &sb) < 0)
1083 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
1085 if (!S_ISDIR(sb.st_mode))
1087 "ERROR: \"%s\" is not a directory.",
1092 * If we have a callgraph be created, select the outputfile.
1094 if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
1095 if (strcmp(graphfilename, "-") == 0)
1096 args.pa_graphfile = args.pa_printfile;
1098 args.pa_graphfile = fopen(graphfilename, "w");
1099 if (args.pa_graphfile == NULL)
1101 "ERROR: cannot open \"%s\" for writing",
1105 if (args.pa_flags & FLAG_DO_ANNOTATE) {
1106 args.pa_graphfile = fopen(graphfilename, "w");
1107 if (args.pa_graphfile == NULL)
1108 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing",
1112 /* if we've been asked to process a log file, skip init */
1113 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0)
1114 libpmc_initialize(&npmc);
1116 /* Allocate a kqueue */
1117 if ((pmcstat_kq = kqueue()) < 0)
1118 err(EX_OSERR, "ERROR: Cannot allocate kqueue");
1120 /* Setup the logfile as the source. */
1121 if (args.pa_flags & FLAG_READ_LOGFILE) {
1123 * Print the log in textual form if we haven't been
1124 * asked to generate profiling information.
1126 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
1127 args.pa_flags |= FLAG_DO_PRINT;
1129 pmcstat_log_initialize_logging();
1130 rfd = pmcstat_open_log(args.pa_inputpath,
1131 PMCSTAT_OPEN_FOR_READ);
1132 if ((args.pa_logparser = pmclog_open(rfd)) == NULL)
1133 err(EX_OSERR, "ERROR: Cannot create parser");
1134 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0)
1135 err(EX_OSERR, "ERROR: fcntl(2) failed");
1136 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD,
1138 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1139 err(EX_OSERR, "ERROR: Cannot register kevent");
1142 * Configure the specified log file or setup a default log
1143 * consumer via a pipe.
1145 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) {
1146 if (args.pa_outputpath)
1147 args.pa_logfd = pmcstat_open_log(args.pa_outputpath,
1148 PMCSTAT_OPEN_FOR_WRITE);
1151 * process the log on the fly by reading it in
1154 if (pipe(pipefd) < 0)
1155 err(EX_OSERR, "ERROR: pipe(2) failed");
1157 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0)
1158 err(EX_OSERR, "ERROR: fcntl(2) failed");
1160 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
1163 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1164 err(EX_OSERR, "ERROR: Cannot register kevent");
1166 args.pa_logfd = pipefd[WRITEPIPEFD];
1168 args.pa_flags |= FLAG_HAS_PIPE;
1169 if ((args.pa_flags & FLAG_DO_TOP) == 0)
1170 args.pa_flags |= FLAG_DO_PRINT;
1171 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
1174 if (pmc_configure_logfile(args.pa_logfd) < 0)
1175 err(EX_OSERR, "ERROR: Cannot configure log file");
1178 /* remember to check for driver errors if we are sampling or logging */
1179 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) ||
1180 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE);
1183 if (args.pa_flags & FLAG_READ_LOGFILE) {
1187 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1188 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
1189 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid,
1192 "ERROR: Cannot allocate %s-mode pmc with specification \"%s\"",
1193 PMC_IS_SYSTEM_MODE(ev->ev_mode) ?
1194 "system" : "process", ev->ev_spec);
1196 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
1197 pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
1199 "ERROR: Cannot set sampling count for PMC \"%s\"",
1203 /* compute printout widths */
1204 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1209 (void) pmc_width(ev->ev_pmcid, &counter_width);
1210 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */
1211 display_width = (int) floor(counter_width / 3.32193) + 1;
1213 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
1214 header_width += 3; /* 2 digit CPU number + '/' */
1216 if (header_width > display_width) {
1217 ev->ev_fieldskip = 0;
1218 ev->ev_fieldwidth = header_width;
1220 ev->ev_fieldskip = display_width -
1222 ev->ev_fieldwidth = display_width;
1227 * If our output is being set to a terminal, register a handler
1228 * for window size changes.
1231 if (isatty(fileno(args.pa_printfile))) {
1233 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0)
1234 err(EX_OSERR, "ERROR: Cannot determine window size");
1236 pmcstat_displayheight = ws.ws_row - 1;
1237 pmcstat_displaywidth = ws.ws_col - 1;
1239 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1241 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1243 "ERROR: Cannot register kevent for SIGWINCH");
1249 * Listen to key input in top mode.
1251 if (args.pa_flags & FLAG_DO_TOP) {
1252 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL);
1253 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1254 err(EX_OSERR, "ERROR: Cannot register kevent");
1257 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1258 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1259 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
1261 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1262 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1263 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO");
1266 * An exec() failure of a forked child is signalled by the
1267 * child sending the parent a SIGCHLD. We don't register an
1268 * actual signal handler for SIGCHLD, but instead use our
1269 * kqueue to pick up the signal.
1271 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1272 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1273 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD");
1276 * Setup a timer if we have counting mode PMCs needing to be printed or
1277 * top mode plugin is active.
1279 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1280 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) ||
1281 (args.pa_flags & FLAG_DO_TOP)) {
1282 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1283 args.pa_interval * 1000, NULL);
1285 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1287 "ERROR: Cannot register kevent for timer");
1291 * Setup a duration timer if we have sampling mode PMCs and
1292 * a duration time is set
1294 if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1295 (args.pa_flags & FLAG_HAS_DURATION)) {
1296 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1297 args.pa_duration * 1000, NULL);
1299 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1300 err(EX_OSERR, "ERROR: Cannot register kevent for "
1304 /* attach PMCs to the target process, starting it if specified */
1305 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1306 pmcstat_create_process(pmcstat_sockpair, &args, pmcstat_kq);
1308 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0)
1309 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics");
1311 /* Attach process pmcs to the target process. */
1312 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) {
1313 if (SLIST_EMPTY(&args.pa_targets))
1315 "ERROR: No matching target processes.");
1316 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS)
1317 pmcstat_attach_pmcs(&args);
1320 kvm_close(pmcstat_kvm);
1325 /* start the pmcs */
1326 pmcstat_start_pmcs();
1328 /* start the (commandline) process if needed */
1329 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1330 pmcstat_start_process(pmcstat_sockpair);
1332 /* initialize logging */
1333 pmcstat_log_initialize_logging();
1335 /* Handle SIGINT using the kqueue loop */
1336 sa.sa_handler = SIG_IGN;
1338 (void) sigemptyset(&sa.sa_mask);
1340 if (sigaction(SIGINT, &sa, NULL) < 0)
1341 err(EX_OSERR, "ERROR: Cannot install signal handler");
1344 * Setup the top mode display.
1346 if (args.pa_flags & FLAG_DO_TOP) {
1347 args.pa_flags &= ~FLAG_DO_PRINT;
1349 if (args.pa_toptty) {
1354 if(has_colors() == TRUE) {
1355 args.pa_topcolor = 1;
1357 use_default_colors();
1358 pair_content(0, &cf, &cb);
1359 init_pair(1, COLOR_RED, cb);
1360 init_pair(2, COLOR_YELLOW, cb);
1361 init_pair(3, COLOR_GREEN, cb);
1367 intrflush(stdscr, FALSE);
1368 keypad(stdscr, TRUE);
1370 /* Get terminal width / height with ncurses. */
1372 pmcstat_displayheight, pmcstat_displaywidth);
1373 pmcstat_displayheight--; pmcstat_displaywidth--;
1374 atexit(pmcstat_topexit);
1379 * loop till either the target process (if any) exits, or we
1380 * are killed by a SIGINT or we reached the time duration.
1382 runstate = PMCSTAT_RUNNING;
1383 do_print = do_read = 0;
1385 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
1387 err(EX_OSERR, "ERROR: kevent failed");
1392 if (kev.flags & EV_ERROR)
1393 errc(EX_OSERR, kev.data, "ERROR: kevent failed");
1395 switch (kev.filter) {
1396 case EVFILT_PROC: /* target has exited */
1397 runstate = pmcstat_close_log(&args);
1401 case EVFILT_READ: /* log file data is present */
1402 if (kev.ident == (unsigned)fileno(stdin) &&
1403 (args.pa_flags & FLAG_DO_TOP)) {
1404 if (pmcstat_keypress_log())
1405 runstate = pmcstat_close_log(&args);
1408 runstate = pmcstat_process_log();
1413 if (kev.ident == SIGCHLD) {
1415 * The child process sends us a
1416 * SIGCHLD if its exec() failed. We
1417 * wait for it to exit and then exit
1421 runstate = PMCSTAT_FINISHED;
1422 } else if (kev.ident == SIGIO) {
1424 * We get a SIGIO if a PMC loses all
1425 * of its targets, or if logfile
1426 * writes encounter an error.
1428 runstate = pmcstat_close_log(&args);
1429 do_print = 1; /* print PMCs at exit */
1430 } else if (kev.ident == SIGINT) {
1431 /* Kill the child process if we started it */
1432 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1433 pmcstat_kill_process();
1434 runstate = pmcstat_close_log(&args);
1435 } else if (kev.ident == SIGWINCH) {
1436 if (ioctl(fileno(args.pa_printfile),
1437 TIOCGWINSZ, &ws) < 0)
1439 "ERROR: Cannot determine window size");
1440 pmcstat_displayheight = ws.ws_row - 1;
1441 pmcstat_displaywidth = ws.ws_col - 1;
1448 /* time duration reached, exit */
1449 if (args.pa_flags & FLAG_HAS_DURATION) {
1450 runstate = PMCSTAT_FINISHED;
1453 /* print out counting PMCs */
1454 if ((args.pa_flags & FLAG_DO_TOP) &&
1455 (args.pa_flags & FLAG_HAS_PIPE) &&
1456 pmc_flush_logfile() == 0)
1463 if (do_print && !do_read) {
1464 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) {
1465 pmcstat_print_pmcs();
1466 if (runstate == PMCSTAT_FINISHED &&
1468 (args.pa_flags & FLAG_DO_PRINT) == 0)
1469 (void) fprintf(args.pa_printfile, "\n");
1471 if (args.pa_flags & FLAG_DO_TOP)
1472 pmcstat_display_log();
1476 } while (runstate != PMCSTAT_FINISHED);
1478 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) {
1483 /* flush any pending log entries */
1484 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE))
1485 pmc_close_logfile();
1489 /* check if the driver lost any samples or events */
1490 if (check_driver_stats) {
1491 if (pmc_get_driver_stats(&ds_end) < 0)
1493 "ERROR: Cannot retrieve driver statistics");
1494 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
1495 args.pa_verbosity > 0)
1497 "WARNING: sampling was paused at least %u time%s.\n"
1498 "Please consider tuning the \"kern.hwpmc.nsamples\" tunable.",
1499 ds_end.pm_intr_bufferfull -
1500 ds_start.pm_intr_bufferfull,
1501 ((ds_end.pm_intr_bufferfull -
1502 ds_start.pm_intr_bufferfull) != 1) ? "s" : ""
1504 if (ds_start.pm_buffer_requests_failed !=
1505 ds_end.pm_buffer_requests_failed &&
1506 args.pa_verbosity > 0)
1508 "WARNING: at least %u event%s were discarded while running.\n"
1509 "Please consider tuning the \"kern.hwpmc.nbuffers_pcpu\" tunable.",
1510 ds_end.pm_buffer_requests_failed -
1511 ds_start.pm_buffer_requests_failed,
1512 ((ds_end.pm_buffer_requests_failed -
1513 ds_start.pm_buffer_requests_failed) != 1) ? "s" : ""