2 * Copyright (c) 2003-2008, Joseph Koshy
3 * Copyright (c) 2007 The FreeBSD Foundation
6 * Portions of this software were developed by A. Joseph Koshy under
7 * sponsorship from the FreeBSD Foundation and Google, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/types.h>
35 #include <sys/event.h>
36 #include <sys/param.h>
37 #include <sys/queue.h>
38 #include <sys/socket.h>
40 #include <sys/sysctl.h>
42 #include <sys/ttycom.h>
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'.
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.
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.
85 * pmcstat(8) can also execute a command line and attach PMCs to the
86 * resulting child process. The protocol used is as follows:
88 * - parent creates a socketpair for two way communication and
94 * - Wait for childs 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 * - Recieves signal, attempts exec().
103 * After this point normal processing can happen.
108 int pmcstat_interrupt = 0;
109 int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT;
110 int pmcstat_displaywidth = DEFAULT_DISPLAY_WIDTH;
111 int pmcstat_sockpair[NSOCKPAIRFD];
114 struct kinfo_proc *pmcstat_plist;
115 struct pmcstat_args args;
118 pmcstat_attach_pmcs(void)
120 struct pmcstat_ev *ev;
121 struct pmcstat_target *pt;
124 /* Attach all process PMCs to target processes. */
126 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
127 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
129 SLIST_FOREACH(pt, &args.pa_targets, pt_next)
130 if (pmc_attach(ev->ev_pmcid, pt->pt_pid) == 0)
132 else if (errno != ESRCH)
133 err(EX_OSERR, "ERROR: cannot attach pmc "
134 "\"%s\" to process %d", ev->ev_name,
139 errx(EX_DATAERR, "ERROR: No processes were attached to.");
144 pmcstat_cleanup(void)
146 struct pmcstat_ev *ev, *tmp;
148 /* release allocated PMCs. */
149 STAILQ_FOREACH_SAFE(ev, &args.pa_events, ev_next, tmp)
150 if (ev->ev_pmcid != PMC_ID_INVALID) {
151 if (pmc_stop(ev->ev_pmcid) < 0)
152 err(EX_OSERR, "ERROR: cannot stop pmc 0x%x "
153 "\"%s\"", ev->ev_pmcid, ev->ev_name);
154 if (pmc_release(ev->ev_pmcid) < 0)
155 err(EX_OSERR, "ERROR: cannot release pmc "
156 "0x%x \"%s\"", ev->ev_pmcid, ev->ev_name);
159 STAILQ_REMOVE(&args.pa_events, ev, pmcstat_ev, ev_next);
163 /* de-configure the log file if present. */
164 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE))
165 (void) pmc_configure_logfile(-1);
167 if (args.pa_logparser) {
168 pmclog_close(args.pa_logparser);
169 args.pa_logparser = NULL;
172 pmcstat_shutdown_logging();
176 pmcstat_clone_event_descriptor(struct pmcstat_ev *ev,
180 struct pmcstat_ev *ev_clone;
182 while ((cpu = ffs(cpumask)) > 0) {
185 if ((ev_clone = malloc(sizeof(*ev_clone))) == NULL)
186 errx(EX_SOFTWARE, "ERROR: Out of memory");
187 (void) memset(ev_clone, 0, sizeof(*ev_clone));
189 ev_clone->ev_count = ev->ev_count;
190 ev_clone->ev_cpu = cpu;
191 ev_clone->ev_cumulative = ev->ev_cumulative;
192 ev_clone->ev_flags = ev->ev_flags;
193 ev_clone->ev_mode = ev->ev_mode;
194 ev_clone->ev_name = strdup(ev->ev_name);
195 ev_clone->ev_pmcid = ev->ev_pmcid;
196 ev_clone->ev_saved = ev->ev_saved;
197 ev_clone->ev_spec = strdup(ev->ev_spec);
199 STAILQ_INSERT_TAIL(&args.pa_events, ev_clone, ev_next);
201 cpumask &= ~(1 << cpu);
206 pmcstat_create_process(void)
211 struct pmcstat_target *pt;
213 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pmcstat_sockpair) < 0)
214 err(EX_OSERR, "ERROR: cannot create socket pair");
216 switch (pid = fork()) {
218 err(EX_OSERR, "ERROR: cannot fork");
222 (void) close(pmcstat_sockpair[PARENTSOCKET]);
224 /* Write a token to tell our parent we've started executing. */
225 if (write(pmcstat_sockpair[CHILDSOCKET], "+", 1) != 1)
226 err(EX_OSERR, "ERROR (child): cannot write token");
228 /* Wait for our parent to signal us to start. */
229 if (read(pmcstat_sockpair[CHILDSOCKET], &token, 1) < 0)
230 err(EX_OSERR, "ERROR (child): cannot read token");
231 (void) close(pmcstat_sockpair[CHILDSOCKET]);
233 /* exec() the program requested */
234 execvp(*args.pa_argv, args.pa_argv);
235 /* and if that fails, notify the parent */
236 kill(getppid(), SIGCHLD);
237 err(EX_OSERR, "ERROR: execvp \"%s\" failed", *args.pa_argv);
240 default: /* parent */
241 (void) close(pmcstat_sockpair[CHILDSOCKET]);
245 /* Ask to be notified via a kevent when the target process exits. */
246 EV_SET(&kev, pid, EVFILT_PROC, EV_ADD|EV_ONESHOT, NOTE_EXIT, 0,
248 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
249 err(EX_OSERR, "ERROR: cannot monitor child process %d", pid);
251 if ((pt = malloc(sizeof(*pt))) == NULL)
252 errx(EX_SOFTWARE, "ERROR: Out of memory.");
255 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
257 /* Wait for the child to signal that its ready to go. */
258 if (read(pmcstat_sockpair[PARENTSOCKET], &token, 1) < 0)
259 err(EX_OSERR, "ERROR (parent): cannot read token");
265 pmcstat_find_targets(const char *spec)
267 int n, nproc, pid, rv;
268 struct pmcstat_target *pt;
269 char errbuf[_POSIX2_LINE_MAX], *end;
270 static struct kinfo_proc *kp;
274 /* First check if we've been given a process id. */
275 pid = strtol(spec, &end, 0);
276 if (end != spec && pid >= 0) {
277 if ((pt = malloc(sizeof(*pt))) == NULL)
280 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
284 /* Otherwise treat arg as a regular expression naming processes. */
285 if (pmcstat_kvm == NULL) {
286 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0,
288 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"",
290 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC,
292 err(EX_OSERR, "ERROR: Cannot get process list: %s",
293 kvm_geterr(pmcstat_kvm));
297 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) {
298 regerror(rv, ®, errbuf, sizeof(errbuf));
299 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s",
303 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) {
304 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) {
305 if ((pt = malloc(sizeof(*pt))) == NULL)
307 pt->pt_pid = kp->ki_pid;
308 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
309 } else if (rv != REG_NOMATCH) {
310 regerror(rv, ®, errbuf, sizeof(errbuf));
311 errx(EX_SOFTWARE, "ERROR: Regex evalation failed: %s",
321 errx(EX_SOFTWARE, "Out of memory.");
326 pmcstat_get_cpumask(const char *cpuspec)
337 cpu = strtol(s, &end, 0);
338 if (cpu < 0 || end == s)
339 errx(EX_USAGE, "ERROR: Illegal CPU specification "
341 cpumask |= (1 << cpu);
342 s = end + strspn(end, ", \t");
349 pmcstat_kill_process(void)
351 struct pmcstat_target *pt;
353 assert(args.pa_flags & FLAG_HAS_COMMANDLINE);
356 * If a command line was specified, it would be the very first
357 * in the list, before any other processes specified by -t.
359 pt = SLIST_FIRST(&args.pa_targets);
362 if (kill(pt->pt_pid, SIGINT) != 0)
363 err(EX_OSERR, "ERROR: cannot signal child process");
367 pmcstat_start_pmcs(void)
369 struct pmcstat_ev *ev;
371 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
373 assert(ev->ev_pmcid != PMC_ID_INVALID);
375 if (pmc_start(ev->ev_pmcid) < 0) {
376 warn("ERROR: Cannot start pmc 0x%x \"%s\"",
377 ev->ev_pmcid, ev->ev_name);
386 pmcstat_print_headers(void)
388 struct pmcstat_ev *ev;
391 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX);
393 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
394 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
397 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
399 if (ev->ev_fieldskip != 0)
400 (void) fprintf(args.pa_printfile, "%*s",
401 ev->ev_fieldskip, "");
402 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2;
405 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ",
406 ev->ev_cpu, w-3, ev->ev_name);
408 (void) fprintf(args.pa_printfile, "p/%*s ", w,
412 (void) fflush(args.pa_printfile);
416 pmcstat_print_counters(void)
419 struct pmcstat_ev *ev;
422 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
424 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
426 /* skip sampling mode counters */
427 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
430 if (pmc_read(ev->ev_pmcid, &value) < 0)
431 err(EX_OSERR, "ERROR: Cannot read pmc "
432 "\"%s\"", ev->ev_name);
434 (void) fprintf(args.pa_printfile, "%*ju ",
435 ev->ev_fieldwidth + extra_width,
436 (uintmax_t) ev->ev_cumulative ? value :
437 (value - ev->ev_saved));
439 if (ev->ev_cumulative == 0)
440 ev->ev_saved = value;
444 (void) fflush(args.pa_printfile);
452 pmcstat_print_pmcs(void)
454 static int linecount = 0;
456 /* check if we need to print a header line */
457 if (++linecount > pmcstat_displayheight) {
458 (void) fprintf(args.pa_printfile, "\n");
462 pmcstat_print_headers();
463 (void) fprintf(args.pa_printfile, "\n");
465 pmcstat_print_counters();
471 * Do process profiling
473 * If a pid was specified, attach each allocated PMC to the target
474 * process. Otherwise, fork a child and attach the PMCs to the child,
475 * and have the child exec() the target program.
479 pmcstat_start_process(void)
481 /* Signal the child to proceed. */
482 if (write(pmcstat_sockpair[PARENTSOCKET], "!", 1) != 1)
483 err(EX_OSERR, "ERROR (parent): write of token failed");
485 (void) close(pmcstat_sockpair[PARENTSOCKET]);
489 pmcstat_show_usage(void)
492 "[options] [commandline]\n"
493 "\t Measure process and/or system performance using hardware\n"
494 "\t performance monitoring counters.\n"
495 "\t Options include:\n"
496 "\t -C\t\t (toggle) show cumulative counts\n"
497 "\t -D path\t create profiles in directory \"path\"\n"
498 "\t -E\t\t (toggle) show counts at process exit\n"
499 "\t -F file\t write a system-wide callgraph (Kcachegrind format)"
501 "\t -G file\t write a system-wide callgraph to \"file\"\n"
502 "\t -M file\t print executable/gmon file map to \"file\"\n"
503 "\t -N\t\t (toggle) capture callchains\n"
504 "\t -O file\t send log output to \"file\"\n"
505 "\t -P spec\t allocate a process-private sampling PMC\n"
506 "\t -R file\t read events from \"file\"\n"
507 "\t -S spec\t allocate a system-wide sampling PMC\n"
508 "\t -T\t\t start in top mode\n"
509 "\t -W\t\t (toggle) show counts per context switch\n"
510 "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n"
511 "\t -d\t\t (toggle) track descendants\n"
512 "\t -f spec\t pass \"spec\" to as plugin option\n"
513 "\t -g\t\t produce gprof(1) compatible profiles\n"
514 "\t -k dir\t\t set the path to the kernel\n"
515 "\t -m file\t print sampled PCs to \"file\"\n"
516 "\t -n rate\t set sampling rate\n"
517 "\t -o file\t send print output to \"file\"\n"
518 "\t -p spec\t allocate a process-private counting PMC\n"
519 "\t -q\t\t suppress verbosity\n"
520 "\t -r fsroot\t specify FS root directory\n"
521 "\t -s spec\t allocate a system-wide counting PMC\n"
522 "\t -t process-spec attach to running processes matching "
524 "\t -v\t\t increase verbosity\n"
525 "\t -w secs\t set printing time interval\n"
526 "\t -z depth\t limit callchain display depth"
531 * At exit handler for top mode
535 pmcstat_topexit(void)
553 main(int argc, char **argv)
556 int option, npmc, ncpu, haltedcpus;
557 int c, check_driver_stats, current_cpu, current_sampling_count;
558 int do_callchain, do_descendants, do_logproccsw, do_logprocexit;
559 int do_print, do_read;
563 int use_cumulative_counts;
567 const char *errmsg, *graphfilename;
568 enum pmcstat_state runstate;
569 struct pmc_driverstats ds_start, ds_end;
570 struct pmcstat_ev *ev;
575 char buffer[PATH_MAX];
577 check_driver_stats = 0;
579 current_sampling_count = DEFAULT_SAMPLE_COUNT;
584 use_cumulative_counts = 0;
586 args.pa_required = 0;
588 args.pa_verbosity = 1;
591 args.pa_kernel = strdup("/boot/kernel");
592 args.pa_samplesdir = ".";
593 args.pa_printfile = stderr;
594 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
595 args.pa_graphfile = NULL;
596 args.pa_interval = DEFAULT_WAIT_INTERVAL;
597 args.pa_mapfilename = NULL;
598 args.pa_inputpath = NULL;
599 args.pa_outputpath = NULL;
600 args.pa_pplugin = PMCSTAT_PL_NONE;
601 args.pa_plugin = PMCSTAT_PL_NONE;
602 args.pa_ctdumpinstr = 1;
603 args.pa_topmode = PMCSTAT_TOP_DELTA;
605 args.pa_topcolor = 0;
606 args.pa_mergepmc = 0;
607 STAILQ_INIT(&args.pa_events);
608 SLIST_INIT(&args.pa_targets);
609 bzero(&ds_start, sizeof(ds_start));
610 bzero(&ds_end, sizeof(ds_end));
614 * The initial CPU mask specifies all non-halted CPUS in the
618 if (sysctlbyname("hw.ncpu", &ncpu, &dummy, NULL, 0) < 0)
619 err(EX_OSERR, "ERROR: Cannot determine the number of CPUs");
620 cpumask = (1 << ncpu) - 1;
623 if (sysctlbyname("machdep.hlt_cpus", &haltedcpus, &dummy,
625 err(EX_OSERR, "ERROR: Cannot determine which CPUs are "
627 cpumask &= ~haltedcpus;
630 while ((option = getopt(argc, argv,
631 "CD:EF:G:M:NO:P:R:S:TWc:df:gk:m:n:o:p:qr:s:t:vw:z:")) != -1)
633 case 'C': /* cumulative values */
634 use_cumulative_counts = !use_cumulative_counts;
635 args.pa_required |= FLAG_HAS_COUNTING_PMCS;
640 if (optarg[0] == '*' && optarg[1] == '\0')
641 cpumask = ((1 << ncpu) - 1) & ~haltedcpus;
643 cpumask = pmcstat_get_cpumask(optarg);
645 args.pa_flags |= FLAGS_HAS_CPUMASK;
646 args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
650 if (stat(optarg, &sb) < 0)
651 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
653 if (!S_ISDIR(sb.st_mode))
654 errx(EX_USAGE, "ERROR: \"%s\" is not a "
655 "directory.", optarg);
656 args.pa_samplesdir = optarg;
657 args.pa_flags |= FLAG_HAS_SAMPLESDIR;
658 args.pa_required |= FLAG_DO_GPROF;
661 case 'd': /* toggle descendents */
662 do_descendants = !do_descendants;
663 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
666 case 'F': /* produce a system-wide calltree */
667 args.pa_flags |= FLAG_DO_CALLGRAPHS;
668 args.pa_plugin = PMCSTAT_PL_CALLTREE;
669 graphfilename = optarg;
672 case 'f': /* plugins options */
673 if (args.pa_plugin == PMCSTAT_PL_NONE)
674 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T.");
675 pmcstat_pluginconfigure_log(optarg);
678 case 'G': /* produce a system-wide callgraph */
679 args.pa_flags |= FLAG_DO_CALLGRAPHS;
680 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
681 graphfilename = optarg;
684 case 'g': /* produce gprof compatible profiles */
685 args.pa_flags |= FLAG_DO_GPROF;
686 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH;
687 args.pa_plugin = PMCSTAT_PL_GPROF;
690 case 'k': /* pathname to the kernel */
691 free(args.pa_kernel);
692 args.pa_kernel = strdup(optarg);
693 args.pa_required |= FLAG_DO_ANALYSIS;
694 args.pa_flags |= FLAG_HAS_KERNELPATH;
698 args.pa_flags |= FLAG_DO_ANNOTATE;
699 args.pa_plugin = PMCSTAT_PL_ANNOTATE;
700 graphfilename = optarg;
703 case 'E': /* log process exit */
704 do_logprocexit = !do_logprocexit;
705 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
706 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
709 case 'M': /* mapfile */
710 args.pa_mapfilename = optarg;
714 do_callchain = !do_callchain;
715 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
718 case 'p': /* process virtual counting PMC */
719 case 's': /* system-wide counting PMC */
720 case 'P': /* process virtual sampling PMC */
721 case 'S': /* system-wide sampling PMC */
722 if ((ev = malloc(sizeof(*ev))) == NULL)
723 errx(EX_SOFTWARE, "ERROR: Out of memory.");
726 case 'p': ev->ev_mode = PMC_MODE_TC; break;
727 case 's': ev->ev_mode = PMC_MODE_SC; break;
728 case 'P': ev->ev_mode = PMC_MODE_TS; break;
729 case 'S': ev->ev_mode = PMC_MODE_SS; break;
732 if (option == 'P' || option == 'p') {
733 args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
734 args.pa_required |= (FLAG_HAS_COMMANDLINE |
738 if (option == 'P' || option == 'S') {
739 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
740 args.pa_required |= (FLAG_HAS_PIPE |
741 FLAG_HAS_OUTPUT_LOGFILE);
744 if (option == 'p' || option == 's')
745 args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
747 if (option == 's' || option == 'S')
748 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
750 ev->ev_spec = strdup(optarg);
752 if (option == 'S' || option == 'P')
753 ev->ev_count = current_sampling_count;
757 if (option == 'S' || option == 's')
758 ev->ev_cpu = ffs(cpumask) - 1;
760 ev->ev_cpu = PMC_CPU_ANY;
764 ev->ev_flags |= PMC_F_CALLCHAIN;
766 ev->ev_flags |= PMC_F_DESCENDANTS;
768 ev->ev_flags |= PMC_F_LOG_PROCEXIT;
770 ev->ev_flags |= PMC_F_LOG_PROCCSW;
772 ev->ev_cumulative = use_cumulative_counts;
775 ev->ev_pmcid = PMC_ID_INVALID;
777 /* extract event name */
778 c = strcspn(optarg, ", \t");
779 ev->ev_name = malloc(c + 1);
780 (void) strncpy(ev->ev_name, optarg, c);
781 *(ev->ev_name + c) = '\0';
783 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next);
785 if (option == 's' || option == 'S')
786 pmcstat_clone_event_descriptor(ev,
787 cpumask & ~(1 << ev->ev_cpu));
791 case 'n': /* sampling count */
792 current_sampling_count = strtol(optarg, &end, 0);
793 if (*end != '\0' || current_sampling_count <= 0)
795 "ERROR: Illegal count value \"%s\".",
797 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
800 case 'o': /* outputfile */
801 if (args.pa_printfile != NULL &&
802 args.pa_printfile != stdout &&
803 args.pa_printfile != stderr)
804 (void) fclose(args.pa_printfile);
805 if ((args.pa_printfile = fopen(optarg, "w")) == NULL)
806 errx(EX_OSERR, "ERROR: cannot open \"%s\" for "
808 args.pa_flags |= FLAG_DO_PRINT;
811 case 'O': /* sampling output */
812 if (args.pa_outputpath)
813 errx(EX_USAGE, "ERROR: option -O may only be "
815 args.pa_outputpath = optarg;
816 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE;
819 case 'q': /* quiet mode */
820 args.pa_verbosity = 0;
823 case 'r': /* root FS path */
824 args.pa_fsroot = optarg;
827 case 'R': /* read an existing log file */
828 if (args.pa_inputpath != NULL)
829 errx(EX_USAGE, "ERROR: option -R may only be "
831 args.pa_inputpath = optarg;
832 if (args.pa_printfile == stderr)
833 args.pa_printfile = stdout;
834 args.pa_flags |= FLAG_READ_LOGFILE;
837 case 't': /* target pid or process name */
838 pmcstat_find_targets(optarg);
840 args.pa_flags |= FLAG_HAS_TARGET;
841 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
844 case 'T': /* top mode */
845 args.pa_flags |= FLAG_DO_TOP;
846 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
847 args.pa_ctdumpinstr = 0;
848 args.pa_mergepmc = 1;
849 if (args.pa_printfile == stderr)
850 args.pa_printfile = stdout;
853 case 'v': /* verbose */
857 case 'w': /* wait interval */
858 interval = strtod(optarg, &end);
859 if (*end != '\0' || interval <= 0)
860 errx(EX_USAGE, "ERROR: Illegal wait interval "
861 "value \"%s\".", optarg);
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)
875 errx(EX_USAGE, "ERROR: Illegal callchain "
876 "depth \"%s\".", optarg);
877 args.pa_graphdepth = graphdepth;
878 args.pa_required |= FLAG_DO_CALLGRAPHS;
883 pmcstat_show_usage();
888 args.pa_argc = (argc -= optind);
889 args.pa_argv = (argv += optind);
891 /* If we read from logfile and no specified CPU mask use
892 * the maximum CPU count.
894 if ((args.pa_flags & FLAG_READ_LOGFILE) &&
895 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0)
896 cpumask = 0xffffffff;
898 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
900 if (argc) /* command line present */
901 args.pa_flags |= FLAG_HAS_COMMANDLINE;
903 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS |
904 FLAG_DO_ANNOTATE | FLAG_DO_TOP))
905 args.pa_flags |= FLAG_DO_ANALYSIS;
908 * Check invocation syntax.
911 /* disallow -O and -R together */
912 if (args.pa_outputpath && args.pa_inputpath)
913 errx(EX_USAGE, "ERROR: options -O and -R are mutually "
916 /* -m option is allowed with -R only. */
917 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL)
918 errx(EX_USAGE, "ERROR: option -m requires an input file");
920 /* -m option is not allowed combined with -g or -G. */
921 if (args.pa_flags & FLAG_DO_ANNOTATE &&
922 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
923 errx(EX_USAGE, "ERROR: option -m and -g | -G are mutually "
926 if (args.pa_flags & FLAG_READ_LOGFILE) {
928 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
929 errmsg = "a command line specification";
930 else if (args.pa_flags & FLAG_HAS_TARGET)
931 errmsg = "option -t";
932 else if (!STAILQ_EMPTY(&args.pa_events))
933 errmsg = "a PMC event specification";
935 errx(EX_USAGE, "ERROR: option -R may not be used with "
937 } else if (STAILQ_EMPTY(&args.pa_events))
938 /* All other uses require a PMC spec. */
939 pmcstat_show_usage();
941 /* check for -t pid without a process PMC spec */
942 if ((args.pa_required & FLAG_HAS_TARGET) &&
943 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
944 errx(EX_USAGE, "ERROR: option -t requires a process mode PMC "
947 /* check for process-mode options without a command or -t pid */
948 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
949 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
950 errx(EX_USAGE, "ERROR: options -d, -E, -p, -P, and -W require "
951 "a command line or target process.");
953 /* check for -p | -P without a target process of some sort */
954 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) &&
955 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
956 errx(EX_USAGE, "ERROR: options -P and -p require a "
957 "target process or a command line.");
959 /* check for process-mode options without a process-mode PMC */
960 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
961 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
962 errx(EX_USAGE, "ERROR: options -d, -E, and -W require a "
963 "process mode PMC to be specified.");
965 /* check for -c cpu with no system mode PMCs or logfile. */
966 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
967 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
968 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
969 errx(EX_USAGE, "ERROR: option -c requires at least one "
970 "system mode PMC to be specified.");
972 /* check for counting mode options without a counting PMC */
973 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
974 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
975 errx(EX_USAGE, "ERROR: options -C, -W and -o require at "
976 "least one counting mode PMC to be specified.");
978 /* check for sampling mode options without a sampling PMC spec */
979 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
980 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
981 errx(EX_USAGE, "ERROR: options -N, -n and -O require at "
982 "least one sampling mode PMC to be specified.");
984 /* check if -g/-G/-m/-T are being used correctly */
985 if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
986 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
987 errx(EX_USAGE, "ERROR: options -g/-G/-m/-T require sampling PMCs "
988 "or -R to be specified.");
990 /* check if -O was spuriously specified */
991 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) &&
992 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0)
994 "ERROR: option -O is used only with options "
995 "-E, -P, -S and -W.");
997 /* -k kernel path require -g/-G/-m/-T or -R */
998 if ((args.pa_flags & FLAG_HAS_KERNELPATH) &&
999 (args.pa_flags & FLAG_DO_ANALYSIS) == 0 &&
1000 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
1001 errx(EX_USAGE, "ERROR: option -k is only used with -g/-R/-m/-T.");
1003 /* -D only applies to gprof output mode (-g) */
1004 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) &&
1005 (args.pa_flags & FLAG_DO_GPROF) == 0)
1006 errx(EX_USAGE, "ERROR: option -D is only used with -g.");
1008 /* -M mapfile requires -g or -R */
1009 if (args.pa_mapfilename != NULL &&
1010 (args.pa_flags & FLAG_DO_GPROF) == 0 &&
1011 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
1012 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R.");
1015 * Disallow textual output of sampling PMCs if counting PMCs
1016 * have also been asked for, mostly because the combined output
1017 * is difficult to make sense of.
1019 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1020 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1021 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0))
1022 errx(EX_USAGE, "ERROR: option -O is required if counting and "
1023 "sampling PMCs are specified together.");
1026 * Check if "-k kerneldir" was specified, and if whether
1027 * 'kerneldir' actually refers to a file. If so, use
1028 * `dirname path` to determine the kernel directory.
1030 if (args.pa_flags & FLAG_HAS_KERNELPATH) {
1031 (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot,
1033 if (stat(buffer, &sb) < 0)
1034 err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"",
1036 if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode))
1037 errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.",
1039 if (!S_ISDIR(sb.st_mode)) {
1040 tmp = args.pa_kernel;
1041 args.pa_kernel = strdup(dirname(args.pa_kernel));
1043 (void) snprintf(buffer, sizeof(buffer), "%s%s",
1044 args.pa_fsroot, args.pa_kernel);
1045 if (stat(buffer, &sb) < 0)
1046 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
1048 if (!S_ISDIR(sb.st_mode))
1049 errx(EX_USAGE, "ERROR: \"%s\" is not a "
1050 "directory.", buffer);
1055 * If we have a callgraph be created, select the outputfile.
1057 if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
1058 if (strcmp(graphfilename, "-") == 0)
1059 args.pa_graphfile = args.pa_printfile;
1061 args.pa_graphfile = fopen(graphfilename, "w");
1062 if (args.pa_graphfile == NULL)
1063 err(EX_OSERR, "ERROR: cannot open \"%s\" "
1064 "for writing", graphfilename);
1067 if (args.pa_flags & FLAG_DO_ANNOTATE) {
1068 args.pa_graphfile = fopen(graphfilename, "w");
1069 if (args.pa_graphfile == NULL)
1070 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing",
1074 /* if we've been asked to process a log file, skip init */
1075 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) {
1078 "ERROR: Initialization of the pmc(3) library failed");
1080 if ((npmc = pmc_npmc(0)) < 0) /* assume all CPUs are identical */
1081 err(EX_OSERR, "ERROR: Cannot determine the number of PMCs "
1085 /* Allocate a kqueue */
1086 if ((pmcstat_kq = kqueue()) < 0)
1087 err(EX_OSERR, "ERROR: Cannot allocate kqueue");
1089 /* Setup the logfile as the source. */
1090 if (args.pa_flags & FLAG_READ_LOGFILE) {
1092 * Print the log in textual form if we haven't been
1093 * asked to generate profiling information.
1095 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
1096 args.pa_flags |= FLAG_DO_PRINT;
1098 pmcstat_initialize_logging();
1099 rfd = pmcstat_open_log(args.pa_inputpath,
1100 PMCSTAT_OPEN_FOR_READ);
1101 if ((args.pa_logparser = pmclog_open(rfd)) == NULL)
1102 err(EX_OSERR, "ERROR: Cannot create parser");
1103 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0)
1104 err(EX_OSERR, "ERROR: fcntl(2) failed");
1105 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD,
1107 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1108 err(EX_OSERR, "ERROR: Cannot register kevent");
1111 * Configure the specified log file or setup a default log
1112 * consumer via a pipe.
1114 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) {
1115 if (args.pa_outputpath)
1116 args.pa_logfd = pmcstat_open_log(args.pa_outputpath,
1117 PMCSTAT_OPEN_FOR_WRITE);
1120 * process the log on the fly by reading it in
1123 if (pipe(pipefd) < 0)
1124 err(EX_OSERR, "ERROR: pipe(2) failed");
1126 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0)
1127 err(EX_OSERR, "ERROR: fcntl(2) failed");
1129 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
1132 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1133 err(EX_OSERR, "ERROR: Cannot register kevent");
1135 args.pa_logfd = pipefd[WRITEPIPEFD];
1137 args.pa_flags |= FLAG_HAS_PIPE;
1138 if ((args.pa_flags & FLAG_DO_TOP) == 0)
1139 args.pa_flags |= FLAG_DO_PRINT;
1140 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
1143 if (pmc_configure_logfile(args.pa_logfd) < 0)
1144 err(EX_OSERR, "ERROR: Cannot configure log file");
1147 /* remember to check for driver errors if we are sampling or logging */
1148 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) ||
1149 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE);
1152 if (args.pa_flags & FLAG_READ_LOGFILE) {
1156 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1157 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
1158 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid) < 0)
1159 err(EX_OSERR, "ERROR: Cannot allocate %s-mode pmc with "
1160 "specification \"%s\"",
1161 PMC_IS_SYSTEM_MODE(ev->ev_mode) ? "system" : "process",
1164 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
1165 pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
1166 err(EX_OSERR, "ERROR: Cannot set sampling count "
1167 "for PMC \"%s\"", ev->ev_name);
1170 /* compute printout widths */
1171 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1176 (void) pmc_width(ev->ev_pmcid, &counter_width);
1177 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */
1178 display_width = (int) floor(counter_width / 3.32193) + 1;
1180 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
1181 header_width += 3; /* 2 digit CPU number + '/' */
1183 if (header_width > display_width) {
1184 ev->ev_fieldskip = 0;
1185 ev->ev_fieldwidth = header_width;
1187 ev->ev_fieldskip = display_width -
1189 ev->ev_fieldwidth = display_width;
1194 * If our output is being set to a terminal, register a handler
1195 * for window size changes.
1198 if (isatty(fileno(args.pa_printfile))) {
1200 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0)
1201 err(EX_OSERR, "ERROR: Cannot determine window size");
1203 pmcstat_displayheight = ws.ws_row - 1;
1204 pmcstat_displaywidth = ws.ws_col - 1;
1206 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1208 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1209 err(EX_OSERR, "ERROR: Cannot register kevent for "
1216 * Listen to key input in top mode.
1218 if (args.pa_flags & FLAG_DO_TOP) {
1219 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL);
1220 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1221 err(EX_OSERR, "ERROR: Cannot register kevent");
1224 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1225 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1226 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
1228 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1229 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1230 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO");
1233 * An exec() failure of a forked child is signalled by the
1234 * child sending the parent a SIGCHLD. We don't register an
1235 * actual signal handler for SIGCHLD, but instead use our
1236 * kqueue to pick up the signal.
1238 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1239 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1240 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD");
1243 * Setup a timer if we have counting mode PMCs needing to be printed or
1244 * top mode plugin is active.
1246 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1247 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) ||
1248 (args.pa_flags & FLAG_DO_TOP)) {
1249 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1250 args.pa_interval * 1000, NULL);
1252 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1253 err(EX_OSERR, "ERROR: Cannot register kevent for "
1257 /* attach PMCs to the target process, starting it if specified */
1258 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1259 pmcstat_create_process();
1261 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0)
1262 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics");
1264 /* Attach process pmcs to the target process. */
1265 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) {
1266 if (SLIST_EMPTY(&args.pa_targets))
1267 errx(EX_DATAERR, "ERROR: No matching target "
1269 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS)
1270 pmcstat_attach_pmcs();
1273 kvm_close(pmcstat_kvm);
1278 /* start the pmcs */
1279 pmcstat_start_pmcs();
1281 /* start the (commandline) process if needed */
1282 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1283 pmcstat_start_process();
1285 /* initialize logging */
1286 pmcstat_initialize_logging();
1288 /* Handle SIGINT using the kqueue loop */
1289 sa.sa_handler = SIG_IGN;
1291 (void) sigemptyset(&sa.sa_mask);
1293 if (sigaction(SIGINT, &sa, NULL) < 0)
1294 err(EX_OSERR, "ERROR: Cannot install signal handler");
1297 * Setup the top mode display.
1299 if (args.pa_flags & FLAG_DO_TOP) {
1300 args.pa_flags &= ~FLAG_DO_PRINT;
1302 if (args.pa_toptty) {
1307 if(has_colors() == TRUE) {
1308 args.pa_topcolor = 1;
1310 use_default_colors();
1311 pair_content(0, &cf, &cb);
1312 init_pair(1, COLOR_RED, cb);
1313 init_pair(2, COLOR_YELLOW, cb);
1314 init_pair(3, COLOR_GREEN, cb);
1320 intrflush(stdscr, FALSE);
1321 keypad(stdscr, TRUE);
1323 /* Get terminal width / height with ncurses. */
1324 getmaxyx(stdscr, pmcstat_displayheight, pmcstat_displaywidth);
1325 pmcstat_displayheight--; pmcstat_displaywidth--;
1326 atexit(pmcstat_topexit);
1331 * loop till either the target process (if any) exits, or we
1332 * are killed by a SIGINT.
1334 runstate = PMCSTAT_RUNNING;
1335 do_print = do_read = 0;
1337 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
1339 err(EX_OSERR, "ERROR: kevent failed");
1344 if (kev.flags & EV_ERROR)
1345 errc(EX_OSERR, kev.data, "ERROR: kevent failed");
1347 switch (kev.filter) {
1348 case EVFILT_PROC: /* target has exited */
1349 runstate = pmcstat_close_log();
1353 case EVFILT_READ: /* log file data is present */
1354 if (kev.ident == (unsigned)fileno(stdin) &&
1355 (args.pa_flags & FLAG_DO_TOP)) {
1356 if (pmcstat_keypress_log())
1357 runstate = pmcstat_close_log();
1360 runstate = pmcstat_process_log();
1365 if (kev.ident == SIGCHLD) {
1367 * The child process sends us a
1368 * SIGCHLD if its exec() failed. We
1369 * wait for it to exit and then exit
1373 runstate = PMCSTAT_FINISHED;
1374 } else if (kev.ident == SIGIO) {
1376 * We get a SIGIO if a PMC loses all
1377 * of its targets, or if logfile
1378 * writes encounter an error.
1380 runstate = pmcstat_close_log();
1381 do_print = 1; /* print PMCs at exit */
1382 } else if (kev.ident == SIGINT) {
1383 /* Kill the child process if we started it */
1384 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1385 pmcstat_kill_process();
1386 runstate = pmcstat_close_log();
1387 } else if (kev.ident == SIGWINCH) {
1388 if (ioctl(fileno(args.pa_printfile),
1389 TIOCGWINSZ, &ws) < 0)
1390 err(EX_OSERR, "ERROR: Cannot determine "
1392 pmcstat_displayheight = ws.ws_row - 1;
1393 pmcstat_displaywidth = ws.ws_col - 1;
1399 case EVFILT_TIMER: /* print out counting PMCs */
1400 if ((args.pa_flags & FLAG_DO_TOP) &&
1401 pmc_flush_logfile() == 0)
1408 if (do_print && !do_read) {
1409 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) {
1410 pmcstat_print_pmcs();
1411 if (runstate == PMCSTAT_FINISHED && /* final newline */
1412 (args.pa_flags & FLAG_DO_PRINT) == 0)
1413 (void) fprintf(args.pa_printfile, "\n");
1415 if (args.pa_flags & FLAG_DO_TOP)
1416 pmcstat_display_log();
1420 } while (runstate != PMCSTAT_FINISHED);
1422 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) {
1427 /* flush any pending log entries */
1428 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE))
1429 pmc_close_logfile();
1433 free(args.pa_kernel);
1435 /* check if the driver lost any samples or events */
1436 if (check_driver_stats) {
1437 if (pmc_get_driver_stats(&ds_end) < 0)
1438 err(EX_OSERR, "ERROR: Cannot retrieve driver "
1440 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
1441 args.pa_verbosity > 0)
1442 warnx("WARNING: some samples were dropped. Please "
1443 "consider tuning the \"kern.hwpmc.nsamples\" "
1445 if (ds_start.pm_buffer_requests_failed !=
1446 ds_end.pm_buffer_requests_failed &&
1447 args.pa_verbosity > 0)
1448 warnx("WARNING: some events were discarded. Please "
1449 "consider tuning the \"kern.hwpmc.nbuffers\" "