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>
69 #include <libpmcstat.h>
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'.
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.
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.
89 * pmcstat(8) can also execute a command line and attach PMCs to the
90 * resulting child process. The protocol used is as follows:
92 * - parent creates a socketpair for two way communication and
98 * - Wait for childs 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().
107 * After this point normal processing can happen.
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;
121 pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask)
131 cpu = strtol(s, &end, 0);
132 if (cpu < 0 || end == s)
134 "ERROR: Illegal CPU specification \"%s\".",
136 CPU_SET(cpu, cpumask);
137 s = end + strspn(end, ", \t");
139 assert(!CPU_EMPTY(cpumask));
143 pmcstat_cleanup(void)
145 struct pmcstat_ev *ev;
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)
152 "ERROR: cannot stop pmc 0x%x \"%s\"",
153 ev->ev_pmcid, ev->ev_name);
154 if (pmc_release(ev->ev_pmcid) < 0)
156 "ERROR: cannot release pmc 0x%x \"%s\"",
157 ev->ev_pmcid, ev->ev_name);
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);
164 if (args.pa_logparser) {
165 pmclog_close(args.pa_logparser);
166 args.pa_logparser = NULL;
169 pmcstat_log_shutdown_logging();
173 pmcstat_find_targets(const char *spec)
175 int n, nproc, pid, rv;
176 struct pmcstat_target *pt;
177 char errbuf[_POSIX2_LINE_MAX], *end;
178 static struct kinfo_proc *kp;
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)
188 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
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,
196 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"",
198 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC,
200 err(EX_OSERR, "ERROR: Cannot get process list: %s",
201 kvm_geterr(pmcstat_kvm));
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",
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)
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",
229 errx(EX_SOFTWARE, "Out of memory.");
234 pmcstat_kill_process(void)
236 struct pmcstat_target *pt;
238 assert(args.pa_flags & FLAG_HAS_COMMANDLINE);
241 * If a command line was specified, it would be the very first
242 * in the list, before any other processes specified by -t.
244 pt = SLIST_FIRST(&args.pa_targets);
247 if (kill(pt->pt_pid, SIGINT) != 0)
248 err(EX_OSERR, "ERROR: cannot signal child process");
252 pmcstat_start_pmcs(void)
254 struct pmcstat_ev *ev;
256 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
258 assert(ev->ev_pmcid != PMC_ID_INVALID);
260 if (pmc_start(ev->ev_pmcid) < 0) {
261 warn("ERROR: Cannot start pmc 0x%x \"%s\"",
262 ev->ev_pmcid, ev->ev_name);
270 pmcstat_print_headers(void)
272 struct pmcstat_ev *ev;
275 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX);
277 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
278 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
281 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
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;
289 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ",
290 ev->ev_cpu, w-3, ev->ev_name);
292 (void) fprintf(args.pa_printfile, "p/%*s ", w,
296 (void) fflush(args.pa_printfile);
300 pmcstat_print_counters(void)
303 struct pmcstat_ev *ev;
306 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
308 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
310 /* skip sampling mode counters */
311 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
314 if (pmc_read(ev->ev_pmcid, &value) < 0)
315 err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"",
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));
323 if (ev->ev_cumulative == 0)
324 ev->ev_saved = value;
328 (void) fflush(args.pa_printfile);
336 pmcstat_print_pmcs(void)
338 static int linecount = 0;
340 /* check if we need to print a header line */
341 if (++linecount > pmcstat_displayheight) {
342 (void) fprintf(args.pa_printfile, "\n");
346 pmcstat_print_headers();
347 (void) fprintf(args.pa_printfile, "\n");
349 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\n 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)
427 main(int argc, char **argv)
429 cpuset_t cpumask, rootmask;
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;
440 int use_cumulative_counts;
442 uint64_t current_sampling_count;
443 char *end, *tmp, *event;
444 const char *errmsg, *graphfilename;
445 enum pmcstat_state runstate;
446 struct pmc_driverstats ds_start, ds_end;
447 struct pmcstat_ev *ev;
452 char buffer[PATH_MAX];
454 check_driver_stats = 0;
455 current_sampling_count = 0;
463 use_cumulative_counts = 0;
465 args.pa_required = 0;
467 args.pa_verbosity = 1;
470 args.pa_samplesdir = ".";
471 args.pa_printfile = stderr;
472 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
473 args.pa_graphfile = NULL;
474 args.pa_interval = DEFAULT_WAIT_INTERVAL;
475 args.pa_mapfilename = NULL;
476 args.pa_inputpath = NULL;
477 args.pa_outputpath = NULL;
478 args.pa_pplugin = PMCSTAT_PL_NONE;
479 args.pa_plugin = PMCSTAT_PL_NONE;
480 args.pa_ctdumpinstr = 1;
481 args.pa_topmode = PMCSTAT_TOP_DELTA;
483 args.pa_topcolor = 0;
484 args.pa_mergepmc = 0;
485 args.pa_duration = 0.0;
486 STAILQ_INIT(&args.pa_events);
487 SLIST_INIT(&args.pa_targets);
488 bzero(&ds_start, sizeof(ds_start));
489 bzero(&ds_end, sizeof(ds_end));
494 /* Default to using the running system kernel. */
496 if (sysctlbyname("kern.bootfile", NULL, &len, NULL, 0) == -1)
497 err(EX_OSERR, "ERROR: Cannot determine path of running kernel");
498 args.pa_kernel = malloc(len);
499 if (args.pa_kernel == NULL)
500 errx(EX_SOFTWARE, "ERROR: Out of memory.");
501 if (sysctlbyname("kern.bootfile", args.pa_kernel, &len, NULL, 0) == -1)
502 err(EX_OSERR, "ERROR: Cannot determine path of running kernel");
505 * The initial CPU mask specifies the root mask of this process
506 * which is usually all CPUs in the system.
508 if (cpuset_getaffinity(CPU_LEVEL_ROOT, CPU_WHICH_PID, -1,
509 sizeof(rootmask), &rootmask) == -1)
510 err(EX_OSERR, "ERROR: Cannot determine the root set of CPUs");
511 CPU_COPY(&rootmask, &cpumask);
513 while ((option = getopt(argc, argv,
514 "CD:EF:G:ILM:NO:P:R:S:TUWZa:c:def:gi:k:l:m:n:o:p:qr:s:t:u:vw:z:")) != -1)
516 case 'a': /* Annotate + callgraph */
517 args.pa_flags |= FLAG_DO_ANNOTATE;
518 args.pa_plugin = PMCSTAT_PL_ANNOTATE_CG;
519 graphfilename = optarg;
522 case 'C': /* cumulative values */
523 use_cumulative_counts = !use_cumulative_counts;
524 args.pa_required |= FLAG_HAS_COUNTING_PMCS;
528 if (optarg[0] == '*' && optarg[1] == '\0')
529 CPU_COPY(&rootmask, &cpumask);
531 pmcstat_get_cpumask(optarg, &cpumask);
533 args.pa_flags |= FLAGS_HAS_CPUMASK;
534 args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
538 if (stat(optarg, &sb) < 0)
539 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
541 if (!S_ISDIR(sb.st_mode))
543 "ERROR: \"%s\" is not a directory.",
545 args.pa_samplesdir = optarg;
546 args.pa_flags |= FLAG_HAS_SAMPLESDIR;
547 args.pa_required |= FLAG_DO_GPROF;
550 case 'd': /* toggle descendents */
551 do_descendants = !do_descendants;
552 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
555 case 'E': /* log process exit */
556 do_logprocexit = !do_logprocexit;
557 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
558 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
561 case 'e': /* wide gprof metrics */
562 args.pa_flags |= FLAG_DO_WIDE_GPROF_HC;
565 case 'F': /* produce a system-wide calltree */
566 args.pa_flags |= FLAG_DO_CALLGRAPHS;
567 args.pa_plugin = PMCSTAT_PL_CALLTREE;
568 graphfilename = optarg;
571 case 'f': /* plugins options */
572 if (args.pa_plugin == PMCSTAT_PL_NONE)
573 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T.");
574 pmcstat_pluginconfigure_log(optarg);
577 case 'G': /* produce a system-wide callgraph */
578 args.pa_flags |= FLAG_DO_CALLGRAPHS;
579 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
580 graphfilename = optarg;
583 case 'g': /* produce gprof compatible profiles */
584 args.pa_flags |= FLAG_DO_GPROF;
585 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH;
586 args.pa_plugin = PMCSTAT_PL_GPROF;
590 args.pa_flags |= FLAG_SKIP_TOP_FN_RES;
593 args.pa_flags |= FLAG_FILTER_THREAD_ID;
594 args.pa_tid = strtol(optarg, &end, 0);
597 case 'k': /* pathname to the kernel */
598 free(args.pa_kernel);
599 args.pa_kernel = strdup(optarg);
600 if (args.pa_kernel == NULL)
601 errx(EX_SOFTWARE, "ERROR: Out of memory");
602 args.pa_required |= FLAG_DO_ANALYSIS;
603 args.pa_flags |= FLAG_HAS_KERNELPATH;
610 case 'l': /* time duration in seconds */
611 duration = strtod(optarg, &end);
612 if (*end != '\0' || duration <= 0)
613 errx(EX_USAGE, "ERROR: Illegal duration time "
614 "value \"%s\".", optarg);
615 args.pa_flags |= FLAG_HAS_DURATION;
616 args.pa_duration = duration;
620 args.pa_flags |= FLAG_DO_ANNOTATE;
621 args.pa_plugin = PMCSTAT_PL_ANNOTATE;
622 graphfilename = optarg;
625 case 'M': /* mapfile */
626 args.pa_mapfilename = optarg;
630 do_callchain = !do_callchain;
631 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
634 case 'p': /* process virtual counting PMC */
635 case 's': /* system-wide counting PMC */
636 case 'P': /* process virtual sampling PMC */
637 case 'S': /* system-wide sampling PMC */
638 if ((ev = malloc(sizeof(*ev))) == NULL)
639 errx(EX_SOFTWARE, "ERROR: Out of memory.");
642 case 'p': ev->ev_mode = PMC_MODE_TC; break;
643 case 's': ev->ev_mode = PMC_MODE_SC; break;
644 case 'P': ev->ev_mode = PMC_MODE_TS; break;
645 case 'S': ev->ev_mode = PMC_MODE_SS; break;
648 if (option == 'P' || option == 'p') {
649 args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
650 args.pa_required |= (FLAG_HAS_COMMANDLINE |
654 if (option == 'P' || option == 'S') {
655 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
656 args.pa_required |= (FLAG_HAS_PIPE |
657 FLAG_HAS_OUTPUT_LOGFILE);
660 if (option == 'p' || option == 's')
661 args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
663 if (option == 's' || option == 'S')
664 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
666 ev->ev_spec = strdup(optarg);
667 if (ev->ev_spec == NULL)
668 errx(EX_SOFTWARE, "ERROR: Out of memory.");
670 if (option == 'S' || option == 'P')
671 ev->ev_count = current_sampling_count ? current_sampling_count : pmc_pmu_sample_rate_get(ev->ev_spec);
675 if (option == 'S' || option == 's')
676 ev->ev_cpu = CPU_FFS(&cpumask) - 1;
678 ev->ev_cpu = PMC_CPU_ANY;
682 ev->ev_flags |= PMC_F_CALLCHAIN;
684 ev->ev_flags |= PMC_F_USERCALLCHAIN;
687 ev->ev_flags |= PMC_F_DESCENDANTS;
689 ev->ev_flags |= PMC_F_LOG_PROCEXIT;
691 ev->ev_flags |= PMC_F_LOG_PROCCSW;
693 ev->ev_cumulative = use_cumulative_counts;
696 ev->ev_pmcid = PMC_ID_INVALID;
698 /* extract event name */
699 c = strcspn(optarg, ", \t");
700 ev->ev_name = malloc(c + 1);
701 if (ev->ev_name == NULL)
702 errx(EX_SOFTWARE, "ERROR: Out of memory.");
703 (void) strncpy(ev->ev_name, optarg, c);
704 *(ev->ev_name + c) = '\0';
706 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next);
708 if (option == 's' || option == 'S') {
709 CPU_CLR(ev->ev_cpu, &cpumask);
710 pmcstat_clone_event_descriptor(ev, &cpumask, &args);
711 CPU_SET(ev->ev_cpu, &cpumask);
716 case 'n': /* sampling count */
717 current_sampling_count = strtol(optarg, &end, 0);
718 if (*end != '\0' || current_sampling_count <= 0)
720 "ERROR: Illegal count value \"%s\".",
722 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
725 case 'o': /* outputfile */
726 if (args.pa_printfile != NULL &&
727 args.pa_printfile != stdout &&
728 args.pa_printfile != stderr)
729 (void) fclose(args.pa_printfile);
730 if ((args.pa_printfile = fopen(optarg, "w")) == NULL)
732 "ERROR: cannot open \"%s\" for writing.",
734 args.pa_flags |= FLAG_DO_PRINT;
737 case 'O': /* sampling output */
738 if (args.pa_outputpath)
740 "ERROR: option -O may only be specified once.");
741 args.pa_outputpath = optarg;
742 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE;
745 case 'q': /* quiet mode */
746 args.pa_verbosity = 0;
749 case 'r': /* root FS path */
750 args.pa_fsroot = optarg;
753 case 'R': /* read an existing log file */
754 if (args.pa_inputpath != NULL)
756 "ERROR: option -R may only be specified once.");
757 args.pa_inputpath = optarg;
758 if (args.pa_printfile == stderr)
759 args.pa_printfile = stdout;
760 args.pa_flags |= FLAG_READ_LOGFILE;
763 case 't': /* target pid or process name */
764 pmcstat_find_targets(optarg);
766 args.pa_flags |= FLAG_HAS_TARGET;
767 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
770 case 'T': /* top mode */
771 args.pa_flags |= FLAG_DO_TOP;
772 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
773 args.pa_ctdumpinstr = 0;
774 args.pa_mergepmc = 1;
775 if (args.pa_printfile == stderr)
776 args.pa_printfile = stdout;
783 case 'U': /* toggle user-space callchain capture */
784 do_userspace = !do_userspace;
785 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
787 case 'v': /* verbose */
791 case 'w': /* wait interval */
792 interval = strtod(optarg, &end);
793 if (*end != '\0' || interval <= 0)
795 "ERROR: Illegal wait interval value \"%s\".",
797 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
798 args.pa_interval = interval;
801 case 'W': /* toggle LOG_CSW */
802 do_logproccsw = !do_logproccsw;
803 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
804 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
808 graphdepth = strtod(optarg, &end);
809 if (*end != '\0' || graphdepth <= 0)
811 "ERROR: Illegal callchain depth \"%s\".",
813 args.pa_graphdepth = graphdepth;
814 args.pa_required |= FLAG_DO_CALLGRAPHS;
819 pmcstat_show_usage();
823 if ((do_listcounters | do_descr) &&
824 pmc_pmu_enabled() == 0)
825 errx(EX_USAGE, "pmu features not supported on host or hwpmc not loaded");
826 if (do_listcounters) {
827 pmc_pmu_print_counters(NULL);
828 } else if (do_descr) {
829 pmc_pmu_print_counter_desc(event);
831 if (do_listcounters | do_descr)
834 args.pa_argc = (argc -= optind);
835 args.pa_argv = (argv += optind);
837 /* If we read from logfile and no specified CPU mask use
838 * the maximum CPU count.
840 if ((args.pa_flags & FLAG_READ_LOGFILE) &&
841 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0)
844 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
846 if (argc) /* command line present */
847 args.pa_flags |= FLAG_HAS_COMMANDLINE;
849 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS |
850 FLAG_DO_ANNOTATE | FLAG_DO_TOP))
851 args.pa_flags |= FLAG_DO_ANALYSIS;
854 * Check invocation syntax.
857 /* disallow -O and -R together */
858 if (args.pa_outputpath && args.pa_inputpath)
860 "ERROR: options -O and -R are mutually exclusive.");
862 /* disallow -T and -l together */
863 if ((args.pa_flags & FLAG_HAS_DURATION) &&
864 (args.pa_flags & FLAG_DO_TOP))
865 errx(EX_USAGE, "ERROR: options -T and -l are mutually "
868 /* -a and -m require -R */
869 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL)
870 errx(EX_USAGE, "ERROR: option %s requires an input file",
871 args.pa_plugin == PMCSTAT_PL_ANNOTATE ? "-m" : "-a");
873 /* -m option is not allowed combined with -g or -G. */
874 if (args.pa_flags & FLAG_DO_ANNOTATE &&
875 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
877 "ERROR: option -m and -g | -G are mutually exclusive");
879 if (args.pa_flags & FLAG_READ_LOGFILE) {
881 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
882 errmsg = "a command line specification";
883 else if (args.pa_flags & FLAG_HAS_TARGET)
884 errmsg = "option -t";
885 else if (!STAILQ_EMPTY(&args.pa_events))
886 errmsg = "a PMC event specification";
889 "ERROR: option -R may not be used with %s.",
891 } else if (STAILQ_EMPTY(&args.pa_events))
892 /* All other uses require a PMC spec. */
893 pmcstat_show_usage();
895 /* check for -t pid without a process PMC spec */
896 if ((args.pa_required & FLAG_HAS_TARGET) &&
897 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
899 "ERROR: option -t requires a process mode PMC to be specified."
902 /* check for process-mode options without a command or -t pid */
903 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
904 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
906 "ERROR: options -d, -E, -p, -P, and -W require a command line or target process."
909 /* check for -p | -P without a target process of some sort */
910 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) &&
911 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
913 "ERROR: options -P and -p require a target process or a command line."
916 /* check for process-mode options without a process-mode PMC */
917 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
918 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
920 "ERROR: options -d, -E, and -W require a process mode PMC to be specified."
923 /* check for -c cpu with no system mode PMCs or logfile. */
924 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
925 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
926 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
928 "ERROR: option -c requires at least one system mode PMC to be specified."
931 /* check for counting mode options without a counting PMC */
932 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
933 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
935 "ERROR: options -C, -W and -o require at least one counting mode PMC to be specified."
938 /* check for sampling mode options without a sampling PMC spec */
939 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
940 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
942 "ERROR: options -N, -n and -O require at least one sampling mode PMC to be specified."
945 /* check if -g/-G/-m/-T are being used correctly */
946 if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
947 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
949 "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified."
952 /* check if -e was specified without -g */
953 if ((args.pa_flags & FLAG_DO_WIDE_GPROF_HC) &&
954 !(args.pa_flags & FLAG_DO_GPROF))
956 "ERROR: option -e requires gprof mode to be specified."
959 /* check if -O was spuriously specified */
960 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) &&
961 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0)
963 "ERROR: option -O is used only with options -E, -P, -S and -W."
966 /* -k kernel path require -g/-G/-m/-T or -R */
967 if ((args.pa_flags & FLAG_HAS_KERNELPATH) &&
968 (args.pa_flags & FLAG_DO_ANALYSIS) == 0 &&
969 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
970 errx(EX_USAGE, "ERROR: option -k is only used with -g/-R/-m/-T.");
972 /* -D only applies to gprof output mode (-g) */
973 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) &&
974 (args.pa_flags & FLAG_DO_GPROF) == 0)
975 errx(EX_USAGE, "ERROR: option -D is only used with -g.");
977 /* -M mapfile requires -g or -R */
978 if (args.pa_mapfilename != NULL &&
979 (args.pa_flags & FLAG_DO_GPROF) == 0 &&
980 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
981 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R.");
984 * Disallow textual output of sampling PMCs if counting PMCs
985 * have also been asked for, mostly because the combined output
986 * is difficult to make sense of.
988 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
989 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
990 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0))
992 "ERROR: option -O is required if counting and sampling PMCs are specified together."
996 * Check if 'kerneldir' refers to a file rather than a
997 * directory. If so, use `dirname path` to determine the
1000 (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot,
1002 if (stat(buffer, &sb) < 0)
1003 err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"",
1005 if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode))
1006 errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.",
1008 if (!S_ISDIR(sb.st_mode)) {
1009 tmp = args.pa_kernel;
1010 args.pa_kernel = strdup(dirname(args.pa_kernel));
1011 if (args.pa_kernel == NULL)
1012 errx(EX_SOFTWARE, "ERROR: Out of memory");
1014 (void) snprintf(buffer, sizeof(buffer), "%s%s",
1015 args.pa_fsroot, args.pa_kernel);
1016 if (stat(buffer, &sb) < 0)
1017 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
1019 if (!S_ISDIR(sb.st_mode))
1021 "ERROR: \"%s\" is not a directory.",
1026 * If we have a callgraph be created, select the outputfile.
1028 if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
1029 if (strcmp(graphfilename, "-") == 0)
1030 args.pa_graphfile = args.pa_printfile;
1032 args.pa_graphfile = fopen(graphfilename, "w");
1033 if (args.pa_graphfile == NULL)
1035 "ERROR: cannot open \"%s\" for writing",
1039 if (args.pa_flags & FLAG_DO_ANNOTATE) {
1040 args.pa_graphfile = fopen(graphfilename, "w");
1041 if (args.pa_graphfile == NULL)
1042 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing",
1046 /* if we've been asked to process a log file, skip init */
1047 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) {
1050 "ERROR: Initialization of the pmc(3) library failed"
1053 if ((npmc = pmc_npmc(0)) < 0) /* assume all CPUs are identical */
1055 "ERROR: Cannot determine the number of PMCs on CPU %d",
1059 /* Allocate a kqueue */
1060 if ((pmcstat_kq = kqueue()) < 0)
1061 err(EX_OSERR, "ERROR: Cannot allocate kqueue");
1063 /* Setup the logfile as the source. */
1064 if (args.pa_flags & FLAG_READ_LOGFILE) {
1066 * Print the log in textual form if we haven't been
1067 * asked to generate profiling information.
1069 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
1070 args.pa_flags |= FLAG_DO_PRINT;
1072 pmcstat_log_initialize_logging();
1073 rfd = pmcstat_open_log(args.pa_inputpath,
1074 PMCSTAT_OPEN_FOR_READ);
1075 if ((args.pa_logparser = pmclog_open(rfd)) == NULL)
1076 err(EX_OSERR, "ERROR: Cannot create parser");
1077 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0)
1078 err(EX_OSERR, "ERROR: fcntl(2) failed");
1079 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD,
1081 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1082 err(EX_OSERR, "ERROR: Cannot register kevent");
1085 * Configure the specified log file or setup a default log
1086 * consumer via a pipe.
1088 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) {
1089 if (args.pa_outputpath)
1090 args.pa_logfd = pmcstat_open_log(args.pa_outputpath,
1091 PMCSTAT_OPEN_FOR_WRITE);
1094 * process the log on the fly by reading it in
1097 if (pipe(pipefd) < 0)
1098 err(EX_OSERR, "ERROR: pipe(2) failed");
1100 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0)
1101 err(EX_OSERR, "ERROR: fcntl(2) failed");
1103 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
1106 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1107 err(EX_OSERR, "ERROR: Cannot register kevent");
1109 args.pa_logfd = pipefd[WRITEPIPEFD];
1111 args.pa_flags |= FLAG_HAS_PIPE;
1112 if ((args.pa_flags & FLAG_DO_TOP) == 0)
1113 args.pa_flags |= FLAG_DO_PRINT;
1114 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
1117 if (pmc_configure_logfile(args.pa_logfd) < 0)
1118 err(EX_OSERR, "ERROR: Cannot configure log file");
1121 /* remember to check for driver errors if we are sampling or logging */
1122 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) ||
1123 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE);
1126 if (args.pa_flags & FLAG_READ_LOGFILE) {
1130 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1131 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
1132 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid,
1135 "ERROR: Cannot allocate %s-mode pmc with specification \"%s\"",
1136 PMC_IS_SYSTEM_MODE(ev->ev_mode) ?
1137 "system" : "process", ev->ev_spec);
1139 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
1140 pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
1142 "ERROR: Cannot set sampling count for PMC \"%s\"",
1146 /* compute printout widths */
1147 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1152 (void) pmc_width(ev->ev_pmcid, &counter_width);
1153 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */
1154 display_width = (int) floor(counter_width / 3.32193) + 1;
1156 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
1157 header_width += 3; /* 2 digit CPU number + '/' */
1159 if (header_width > display_width) {
1160 ev->ev_fieldskip = 0;
1161 ev->ev_fieldwidth = header_width;
1163 ev->ev_fieldskip = display_width -
1165 ev->ev_fieldwidth = display_width;
1170 * If our output is being set to a terminal, register a handler
1171 * for window size changes.
1174 if (isatty(fileno(args.pa_printfile))) {
1176 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0)
1177 err(EX_OSERR, "ERROR: Cannot determine window size");
1179 pmcstat_displayheight = ws.ws_row - 1;
1180 pmcstat_displaywidth = ws.ws_col - 1;
1182 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1184 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1186 "ERROR: Cannot register kevent for SIGWINCH");
1192 * Listen to key input in top mode.
1194 if (args.pa_flags & FLAG_DO_TOP) {
1195 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL);
1196 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1197 err(EX_OSERR, "ERROR: Cannot register kevent");
1200 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1201 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1202 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
1204 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1205 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1206 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO");
1209 * An exec() failure of a forked child is signalled by the
1210 * child sending the parent a SIGCHLD. We don't register an
1211 * actual signal handler for SIGCHLD, but instead use our
1212 * kqueue to pick up the signal.
1214 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1215 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1216 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD");
1219 * Setup a timer if we have counting mode PMCs needing to be printed or
1220 * top mode plugin is active.
1222 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1223 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) ||
1224 (args.pa_flags & FLAG_DO_TOP)) {
1225 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1226 args.pa_interval * 1000, NULL);
1228 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1230 "ERROR: Cannot register kevent for timer");
1234 * Setup a duration timer if we have sampling mode PMCs and
1235 * a duration time is set
1237 if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1238 (args.pa_flags & FLAG_HAS_DURATION)) {
1239 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1240 args.pa_duration * 1000, NULL);
1242 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1243 err(EX_OSERR, "ERROR: Cannot register kevent for "
1247 /* attach PMCs to the target process, starting it if specified */
1248 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1249 pmcstat_create_process(pmcstat_sockpair, &args, pmcstat_kq);
1251 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0)
1252 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics");
1254 /* Attach process pmcs to the target process. */
1255 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) {
1256 if (SLIST_EMPTY(&args.pa_targets))
1258 "ERROR: No matching target processes.");
1259 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS)
1260 pmcstat_attach_pmcs(&args);
1263 kvm_close(pmcstat_kvm);
1268 /* start the pmcs */
1269 pmcstat_start_pmcs();
1271 /* start the (commandline) process if needed */
1272 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1273 pmcstat_start_process(pmcstat_sockpair);
1275 /* initialize logging */
1276 pmcstat_log_initialize_logging();
1278 /* Handle SIGINT using the kqueue loop */
1279 sa.sa_handler = SIG_IGN;
1281 (void) sigemptyset(&sa.sa_mask);
1283 if (sigaction(SIGINT, &sa, NULL) < 0)
1284 err(EX_OSERR, "ERROR: Cannot install signal handler");
1287 * Setup the top mode display.
1289 if (args.pa_flags & FLAG_DO_TOP) {
1290 args.pa_flags &= ~FLAG_DO_PRINT;
1292 if (args.pa_toptty) {
1297 if(has_colors() == TRUE) {
1298 args.pa_topcolor = 1;
1300 use_default_colors();
1301 pair_content(0, &cf, &cb);
1302 init_pair(1, COLOR_RED, cb);
1303 init_pair(2, COLOR_YELLOW, cb);
1304 init_pair(3, COLOR_GREEN, cb);
1310 intrflush(stdscr, FALSE);
1311 keypad(stdscr, TRUE);
1313 /* Get terminal width / height with ncurses. */
1315 pmcstat_displayheight, pmcstat_displaywidth);
1316 pmcstat_displayheight--; pmcstat_displaywidth--;
1317 atexit(pmcstat_topexit);
1322 * loop till either the target process (if any) exits, or we
1323 * are killed by a SIGINT or we reached the time duration.
1325 runstate = PMCSTAT_RUNNING;
1326 do_print = do_read = 0;
1328 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
1330 err(EX_OSERR, "ERROR: kevent failed");
1335 if (kev.flags & EV_ERROR)
1336 errc(EX_OSERR, kev.data, "ERROR: kevent failed");
1338 switch (kev.filter) {
1339 case EVFILT_PROC: /* target has exited */
1340 runstate = pmcstat_close_log(&args);
1344 case EVFILT_READ: /* log file data is present */
1345 if (kev.ident == (unsigned)fileno(stdin) &&
1346 (args.pa_flags & FLAG_DO_TOP)) {
1347 if (pmcstat_keypress_log())
1348 runstate = pmcstat_close_log(&args);
1351 runstate = pmcstat_process_log();
1356 if (kev.ident == SIGCHLD) {
1358 * The child process sends us a
1359 * SIGCHLD if its exec() failed. We
1360 * wait for it to exit and then exit
1364 runstate = PMCSTAT_FINISHED;
1365 } else if (kev.ident == SIGIO) {
1367 * We get a SIGIO if a PMC loses all
1368 * of its targets, or if logfile
1369 * writes encounter an error.
1371 runstate = pmcstat_close_log(&args);
1372 do_print = 1; /* print PMCs at exit */
1373 } else if (kev.ident == SIGINT) {
1374 /* Kill the child process if we started it */
1375 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1376 pmcstat_kill_process();
1377 runstate = pmcstat_close_log(&args);
1378 } else if (kev.ident == SIGWINCH) {
1379 if (ioctl(fileno(args.pa_printfile),
1380 TIOCGWINSZ, &ws) < 0)
1382 "ERROR: Cannot determine window size");
1383 pmcstat_displayheight = ws.ws_row - 1;
1384 pmcstat_displaywidth = ws.ws_col - 1;
1391 /* time duration reached, exit */
1392 if (args.pa_flags & FLAG_HAS_DURATION) {
1393 runstate = PMCSTAT_FINISHED;
1396 /* print out counting PMCs */
1397 if ((args.pa_flags & FLAG_DO_TOP) &&
1398 (args.pa_flags & FLAG_HAS_PIPE) &&
1399 pmc_flush_logfile() == 0)
1406 if (do_print && !do_read) {
1407 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) {
1408 pmcstat_print_pmcs();
1409 if (runstate == PMCSTAT_FINISHED &&
1411 (args.pa_flags & FLAG_DO_PRINT) == 0)
1412 (void) fprintf(args.pa_printfile, "\n");
1414 if (args.pa_flags & FLAG_DO_TOP)
1415 pmcstat_display_log();
1419 } while (runstate != PMCSTAT_FINISHED);
1421 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) {
1426 /* flush any pending log entries */
1427 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE))
1428 pmc_close_logfile();
1432 /* check if the driver lost any samples or events */
1433 if (check_driver_stats) {
1434 if (pmc_get_driver_stats(&ds_end) < 0)
1436 "ERROR: Cannot retrieve driver statistics");
1437 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
1438 args.pa_verbosity > 0)
1440 "WARNING: sampling was paused at least %u time%s.\n"
1441 "Please consider tuning the \"kern.hwpmc.nsamples\" tunable.",
1442 ds_end.pm_intr_bufferfull -
1443 ds_start.pm_intr_bufferfull,
1444 ((ds_end.pm_intr_bufferfull -
1445 ds_start.pm_intr_bufferfull) != 1) ? "s" : ""
1447 if (ds_start.pm_buffer_requests_failed !=
1448 ds_end.pm_buffer_requests_failed &&
1449 args.pa_verbosity > 0)
1451 "WARNING: at least %u event%s were discarded while running.\n"
1452 "Please consider tuning the \"kern.hwpmc.nbuffers\" tunable.",
1453 ds_end.pm_buffer_requests_failed -
1454 ds_start.pm_buffer_requests_failed,
1455 ((ds_end.pm_buffer_requests_failed -
1456 ds_start.pm_buffer_requests_failed) != 1) ? "s" : ""