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/param.h>
35 #include <sys/cpuset.h>
36 #include <sys/event.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_clone_event_descriptor(struct pmcstat_ev *ev, const cpuset_t *cpumask)
121 struct pmcstat_ev *ev_clone;
123 mcpu = sizeof(*cpumask) * NBBY;
124 for (cpu = 0; cpu < mcpu; cpu++) {
125 if (!CPU_ISSET(cpu, cpumask))
128 if ((ev_clone = malloc(sizeof(*ev_clone))) == NULL)
129 errx(EX_SOFTWARE, "ERROR: Out of memory");
130 (void) memset(ev_clone, 0, sizeof(*ev_clone));
132 ev_clone->ev_count = ev->ev_count;
133 ev_clone->ev_cpu = cpu;
134 ev_clone->ev_cumulative = ev->ev_cumulative;
135 ev_clone->ev_flags = ev->ev_flags;
136 ev_clone->ev_mode = ev->ev_mode;
137 ev_clone->ev_name = strdup(ev->ev_name);
138 ev_clone->ev_pmcid = ev->ev_pmcid;
139 ev_clone->ev_saved = ev->ev_saved;
140 ev_clone->ev_spec = strdup(ev->ev_spec);
142 STAILQ_INSERT_TAIL(&args.pa_events, ev_clone, ev_next);
147 pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask)
157 cpu = strtol(s, &end, 0);
158 if (cpu < 0 || end == s)
159 errx(EX_USAGE, "ERROR: Illegal CPU specification "
161 CPU_SET(cpu, cpumask);
162 s = end + strspn(end, ", \t");
167 pmcstat_attach_pmcs(void)
169 struct pmcstat_ev *ev;
170 struct pmcstat_target *pt;
173 /* Attach all process PMCs to target processes. */
175 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
176 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
178 SLIST_FOREACH(pt, &args.pa_targets, pt_next)
179 if (pmc_attach(ev->ev_pmcid, pt->pt_pid) == 0)
181 else if (errno != ESRCH)
182 err(EX_OSERR, "ERROR: cannot attach pmc "
183 "\"%s\" to process %d", ev->ev_name,
188 errx(EX_DATAERR, "ERROR: No processes were attached to.");
193 pmcstat_cleanup(void)
195 struct pmcstat_ev *ev, *tmp;
197 /* release allocated PMCs. */
198 STAILQ_FOREACH_SAFE(ev, &args.pa_events, ev_next, tmp)
199 if (ev->ev_pmcid != PMC_ID_INVALID) {
200 if (pmc_stop(ev->ev_pmcid) < 0)
201 err(EX_OSERR, "ERROR: cannot stop pmc 0x%x "
202 "\"%s\"", ev->ev_pmcid, ev->ev_name);
203 if (pmc_release(ev->ev_pmcid) < 0)
204 err(EX_OSERR, "ERROR: cannot release pmc "
205 "0x%x \"%s\"", ev->ev_pmcid, ev->ev_name);
208 STAILQ_REMOVE(&args.pa_events, ev, pmcstat_ev, ev_next);
212 /* de-configure the log file if present. */
213 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE))
214 (void) pmc_configure_logfile(-1);
216 if (args.pa_logparser) {
217 pmclog_close(args.pa_logparser);
218 args.pa_logparser = NULL;
221 pmcstat_shutdown_logging();
225 pmcstat_create_process(void)
230 struct pmcstat_target *pt;
232 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pmcstat_sockpair) < 0)
233 err(EX_OSERR, "ERROR: cannot create socket pair");
235 switch (pid = fork()) {
237 err(EX_OSERR, "ERROR: cannot fork");
241 (void) close(pmcstat_sockpair[PARENTSOCKET]);
243 /* Write a token to tell our parent we've started executing. */
244 if (write(pmcstat_sockpair[CHILDSOCKET], "+", 1) != 1)
245 err(EX_OSERR, "ERROR (child): cannot write token");
247 /* Wait for our parent to signal us to start. */
248 if (read(pmcstat_sockpair[CHILDSOCKET], &token, 1) < 0)
249 err(EX_OSERR, "ERROR (child): cannot read token");
250 (void) close(pmcstat_sockpair[CHILDSOCKET]);
252 /* exec() the program requested */
253 execvp(*args.pa_argv, args.pa_argv);
254 /* and if that fails, notify the parent */
255 kill(getppid(), SIGCHLD);
256 err(EX_OSERR, "ERROR: execvp \"%s\" failed", *args.pa_argv);
259 default: /* parent */
260 (void) close(pmcstat_sockpair[CHILDSOCKET]);
264 /* Ask to be notified via a kevent when the target process exits. */
265 EV_SET(&kev, pid, EVFILT_PROC, EV_ADD|EV_ONESHOT, NOTE_EXIT, 0,
267 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
268 err(EX_OSERR, "ERROR: cannot monitor child process %d", pid);
270 if ((pt = malloc(sizeof(*pt))) == NULL)
271 errx(EX_SOFTWARE, "ERROR: Out of memory.");
274 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
276 /* Wait for the child to signal that its ready to go. */
277 if (read(pmcstat_sockpair[PARENTSOCKET], &token, 1) < 0)
278 err(EX_OSERR, "ERROR (parent): cannot read token");
284 pmcstat_find_targets(const char *spec)
286 int n, nproc, pid, rv;
287 struct pmcstat_target *pt;
288 char errbuf[_POSIX2_LINE_MAX], *end;
289 static struct kinfo_proc *kp;
293 /* First check if we've been given a process id. */
294 pid = strtol(spec, &end, 0);
295 if (end != spec && pid >= 0) {
296 if ((pt = malloc(sizeof(*pt))) == NULL)
299 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
303 /* Otherwise treat arg as a regular expression naming processes. */
304 if (pmcstat_kvm == NULL) {
305 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0,
307 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"",
309 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC,
311 err(EX_OSERR, "ERROR: Cannot get process list: %s",
312 kvm_geterr(pmcstat_kvm));
316 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) {
317 regerror(rv, ®, errbuf, sizeof(errbuf));
318 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s",
322 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) {
323 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) {
324 if ((pt = malloc(sizeof(*pt))) == NULL)
326 pt->pt_pid = kp->ki_pid;
327 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
328 } else if (rv != REG_NOMATCH) {
329 regerror(rv, ®, errbuf, sizeof(errbuf));
330 errx(EX_SOFTWARE, "ERROR: Regex evalation failed: %s",
340 errx(EX_SOFTWARE, "Out of memory.");
345 pmcstat_kill_process(void)
347 struct pmcstat_target *pt;
349 assert(args.pa_flags & FLAG_HAS_COMMANDLINE);
352 * If a command line was specified, it would be the very first
353 * in the list, before any other processes specified by -t.
355 pt = SLIST_FIRST(&args.pa_targets);
358 if (kill(pt->pt_pid, SIGINT) != 0)
359 err(EX_OSERR, "ERROR: cannot signal child process");
363 pmcstat_start_pmcs(void)
365 struct pmcstat_ev *ev;
367 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
369 assert(ev->ev_pmcid != PMC_ID_INVALID);
371 if (pmc_start(ev->ev_pmcid) < 0) {
372 warn("ERROR: Cannot start pmc 0x%x \"%s\"",
373 ev->ev_pmcid, ev->ev_name);
382 pmcstat_print_headers(void)
384 struct pmcstat_ev *ev;
387 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX);
389 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
390 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
393 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
395 if (ev->ev_fieldskip != 0)
396 (void) fprintf(args.pa_printfile, "%*s",
397 ev->ev_fieldskip, "");
398 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2;
401 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ",
402 ev->ev_cpu, w-3, ev->ev_name);
404 (void) fprintf(args.pa_printfile, "p/%*s ", w,
408 (void) fflush(args.pa_printfile);
412 pmcstat_print_counters(void)
415 struct pmcstat_ev *ev;
418 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
420 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
422 /* skip sampling mode counters */
423 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
426 if (pmc_read(ev->ev_pmcid, &value) < 0)
427 err(EX_OSERR, "ERROR: Cannot read pmc "
428 "\"%s\"", ev->ev_name);
430 (void) fprintf(args.pa_printfile, "%*ju ",
431 ev->ev_fieldwidth + extra_width,
432 (uintmax_t) ev->ev_cumulative ? value :
433 (value - ev->ev_saved));
435 if (ev->ev_cumulative == 0)
436 ev->ev_saved = value;
440 (void) fflush(args.pa_printfile);
448 pmcstat_print_pmcs(void)
450 static int linecount = 0;
452 /* check if we need to print a header line */
453 if (++linecount > pmcstat_displayheight) {
454 (void) fprintf(args.pa_printfile, "\n");
458 pmcstat_print_headers();
459 (void) fprintf(args.pa_printfile, "\n");
461 pmcstat_print_counters();
467 * Do process profiling
469 * If a pid was specified, attach each allocated PMC to the target
470 * process. Otherwise, fork a child and attach the PMCs to the child,
471 * and have the child exec() the target program.
475 pmcstat_start_process(void)
477 /* Signal the child to proceed. */
478 if (write(pmcstat_sockpair[PARENTSOCKET], "!", 1) != 1)
479 err(EX_OSERR, "ERROR (parent): write of token failed");
481 (void) close(pmcstat_sockpair[PARENTSOCKET]);
485 pmcstat_show_usage(void)
488 "[options] [commandline]\n"
489 "\t Measure process and/or system performance using hardware\n"
490 "\t performance monitoring counters.\n"
491 "\t Options include:\n"
492 "\t -C\t\t (toggle) show cumulative counts\n"
493 "\t -D path\t create profiles in directory \"path\"\n"
494 "\t -E\t\t (toggle) show counts at process exit\n"
495 "\t -F file\t write a system-wide callgraph (Kcachegrind format)"
497 "\t -G file\t write a system-wide callgraph to \"file\"\n"
498 "\t -M file\t print executable/gmon file map to \"file\"\n"
499 "\t -N\t\t (toggle) capture callchains\n"
500 "\t -O file\t send log output to \"file\"\n"
501 "\t -P spec\t allocate a process-private sampling PMC\n"
502 "\t -R file\t read events from \"file\"\n"
503 "\t -S spec\t allocate a system-wide sampling PMC\n"
504 "\t -T\t\t start in top mode\n"
505 "\t -W\t\t (toggle) show counts per context switch\n"
506 "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n"
507 "\t -d\t\t (toggle) track descendants\n"
508 "\t -f spec\t pass \"spec\" to as plugin option\n"
509 "\t -g\t\t produce gprof(1) compatible profiles\n"
510 "\t -k dir\t\t set the path to the kernel\n"
511 "\t -n rate\t set sampling rate\n"
512 "\t -o file\t send print output to \"file\"\n"
513 "\t -p spec\t allocate a process-private counting PMC\n"
514 "\t -q\t\t suppress verbosity\n"
515 "\t -r fsroot\t specify FS root directory\n"
516 "\t -s spec\t allocate a system-wide counting PMC\n"
517 "\t -t process-spec attach to running processes matching "
519 "\t -v\t\t increase verbosity\n"
520 "\t -w secs\t set printing time interval\n"
521 "\t -z depth\t limit callchain display depth"
526 * At exit handler for top mode
530 pmcstat_topexit(void)
548 main(int argc, char **argv)
552 int hcpu, option, npmc, ncpu;
553 int c, check_driver_stats, current_cpu, current_sampling_count;
554 int do_callchain, do_descendants, do_logproccsw, do_logprocexit;
559 int use_cumulative_counts;
562 const char *errmsg, *graphfilename;
563 enum pmcstat_state runstate;
564 struct pmc_driverstats ds_start, ds_end;
565 struct pmcstat_ev *ev;
570 char buffer[PATH_MAX];
572 check_driver_stats = 0;
574 current_sampling_count = DEFAULT_SAMPLE_COUNT;
579 use_cumulative_counts = 0;
581 args.pa_required = 0;
583 args.pa_verbosity = 1;
586 args.pa_kernel = strdup("/boot/kernel");
587 args.pa_samplesdir = ".";
588 args.pa_printfile = stderr;
589 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
590 args.pa_graphfile = NULL;
591 args.pa_interval = DEFAULT_WAIT_INTERVAL;
592 args.pa_mapfilename = NULL;
593 args.pa_inputpath = NULL;
594 args.pa_outputpath = NULL;
595 args.pa_pplugin = PMCSTAT_PL_NONE;
596 args.pa_plugin = PMCSTAT_PL_NONE;
597 args.pa_ctdumpinstr = 1;
598 args.pa_topmode = PMCSTAT_TOP_DELTA;
600 args.pa_topcolor = 0;
601 args.pa_mergepmc = 0;
602 STAILQ_INIT(&args.pa_events);
603 SLIST_INIT(&args.pa_targets);
604 bzero(&ds_start, sizeof(ds_start));
605 bzero(&ds_end, sizeof(ds_end));
610 * The initial CPU mask specifies all non-halted CPUS in the
614 if (sysctlbyname("hw.ncpu", &ncpu, &dummy, NULL, 0) < 0)
615 err(EX_OSERR, "ERROR: Cannot determine the number of CPUs");
616 for (hcpu = 0; hcpu < ncpu; hcpu++)
617 CPU_SET(hcpu, &cpumask);
619 while ((option = getopt(argc, argv,
620 "CD:EF:G:M:NO:P:R:S:TWc:df:gk:m:n:o:p:qr:s:t:vw:z:")) != -1)
622 case 'C': /* cumulative values */
623 use_cumulative_counts = !use_cumulative_counts;
624 args.pa_required |= FLAG_HAS_COUNTING_PMCS;
629 if (optarg[0] == '*' && optarg[1] == '\0') {
630 for (hcpu = 0; hcpu < ncpu; hcpu++)
631 CPU_SET(hcpu, &cpumask);
633 pmcstat_get_cpumask(optarg, &cpumask);
635 args.pa_flags |= FLAGS_HAS_CPUMASK;
636 args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
640 if (stat(optarg, &sb) < 0)
641 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
643 if (!S_ISDIR(sb.st_mode))
644 errx(EX_USAGE, "ERROR: \"%s\" is not a "
645 "directory.", optarg);
646 args.pa_samplesdir = optarg;
647 args.pa_flags |= FLAG_HAS_SAMPLESDIR;
648 args.pa_required |= FLAG_DO_GPROF;
651 case 'd': /* toggle descendents */
652 do_descendants = !do_descendants;
653 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
656 case 'F': /* produce a system-wide calltree */
657 args.pa_flags |= FLAG_DO_CALLGRAPHS;
658 args.pa_plugin = PMCSTAT_PL_CALLTREE;
659 graphfilename = optarg;
662 case 'f': /* plugins options */
663 if (args.pa_plugin == PMCSTAT_PL_NONE)
664 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T.");
665 pmcstat_pluginconfigure_log(optarg);
668 case 'G': /* produce a system-wide callgraph */
669 args.pa_flags |= FLAG_DO_CALLGRAPHS;
670 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
671 graphfilename = optarg;
674 case 'g': /* produce gprof compatible profiles */
675 args.pa_flags |= FLAG_DO_GPROF;
676 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH;
677 args.pa_plugin = PMCSTAT_PL_GPROF;
680 case 'k': /* pathname to the kernel */
681 free(args.pa_kernel);
682 args.pa_kernel = strdup(optarg);
683 args.pa_required |= FLAG_DO_ANALYSIS;
684 args.pa_flags |= FLAG_HAS_KERNELPATH;
688 args.pa_flags |= FLAG_DO_ANNOTATE;
689 args.pa_plugin = PMCSTAT_PL_ANNOTATE;
690 graphfilename = optarg;
693 case 'E': /* log process exit */
694 do_logprocexit = !do_logprocexit;
695 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
696 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
699 case 'M': /* mapfile */
700 args.pa_mapfilename = optarg;
704 do_callchain = !do_callchain;
705 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
708 case 'p': /* process virtual counting PMC */
709 case 's': /* system-wide counting PMC */
710 case 'P': /* process virtual sampling PMC */
711 case 'S': /* system-wide sampling PMC */
712 if ((ev = malloc(sizeof(*ev))) == NULL)
713 errx(EX_SOFTWARE, "ERROR: Out of memory.");
716 case 'p': ev->ev_mode = PMC_MODE_TC; break;
717 case 's': ev->ev_mode = PMC_MODE_SC; break;
718 case 'P': ev->ev_mode = PMC_MODE_TS; break;
719 case 'S': ev->ev_mode = PMC_MODE_SS; break;
722 if (option == 'P' || option == 'p') {
723 args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
724 args.pa_required |= (FLAG_HAS_COMMANDLINE |
728 if (option == 'P' || option == 'S') {
729 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
730 args.pa_required |= (FLAG_HAS_PIPE |
731 FLAG_HAS_OUTPUT_LOGFILE);
734 if (option == 'p' || option == 's')
735 args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
737 if (option == 's' || option == 'S')
738 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
740 ev->ev_spec = strdup(optarg);
742 if (option == 'S' || option == 'P')
743 ev->ev_count = current_sampling_count;
747 if (option == 'S' || option == 's') {
748 hcpu = sizeof(cpumask) * NBBY;
749 for (hcpu--; hcpu >= 0; hcpu--)
750 if (CPU_ISSET(hcpu, &cpumask))
754 ev->ev_cpu = PMC_CPU_ANY;
758 ev->ev_flags |= PMC_F_CALLCHAIN;
760 ev->ev_flags |= PMC_F_DESCENDANTS;
762 ev->ev_flags |= PMC_F_LOG_PROCEXIT;
764 ev->ev_flags |= PMC_F_LOG_PROCCSW;
766 ev->ev_cumulative = use_cumulative_counts;
769 ev->ev_pmcid = PMC_ID_INVALID;
771 /* extract event name */
772 c = strcspn(optarg, ", \t");
773 ev->ev_name = malloc(c + 1);
774 (void) strncpy(ev->ev_name, optarg, c);
775 *(ev->ev_name + c) = '\0';
777 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next);
779 if (option == 's' || option == 'S') {
780 hcpu = CPU_ISSET(ev->ev_cpu, &cpumask);
781 CPU_CLR(ev->ev_cpu, &cpumask);
782 pmcstat_clone_event_descriptor(ev, &cpumask);
784 CPU_SET(ev->ev_cpu, &cpumask);
789 case 'n': /* sampling count */
790 current_sampling_count = strtol(optarg, &end, 0);
791 if (*end != '\0' || current_sampling_count <= 0)
793 "ERROR: Illegal count value \"%s\".",
795 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
798 case 'o': /* outputfile */
799 if (args.pa_printfile != NULL)
800 (void) fclose(args.pa_printfile);
801 if ((args.pa_printfile = fopen(optarg, "w")) == NULL)
802 errx(EX_OSERR, "ERROR: cannot open \"%s\" for "
804 args.pa_flags |= FLAG_DO_PRINT;
807 case 'O': /* sampling output */
808 if (args.pa_outputpath)
809 errx(EX_USAGE, "ERROR: option -O may only be "
811 args.pa_outputpath = optarg;
812 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE;
815 case 'q': /* quiet mode */
816 args.pa_verbosity = 0;
819 case 'r': /* root FS path */
820 args.pa_fsroot = optarg;
823 case 'R': /* read an existing log file */
824 if (args.pa_inputpath != NULL)
825 errx(EX_USAGE, "ERROR: option -R may only be "
827 args.pa_inputpath = optarg;
828 if (args.pa_printfile == stderr)
829 args.pa_printfile = stdout;
830 args.pa_flags |= FLAG_READ_LOGFILE;
833 case 't': /* target pid or process name */
834 pmcstat_find_targets(optarg);
836 args.pa_flags |= FLAG_HAS_TARGET;
837 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
840 case 'T': /* top mode */
841 args.pa_flags |= FLAG_DO_TOP;
842 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
843 args.pa_ctdumpinstr = 0;
844 args.pa_mergepmc = 1;
845 if (args.pa_printfile == stderr)
846 args.pa_printfile = stdout;
849 case 'v': /* verbose */
853 case 'w': /* wait interval */
854 interval = strtod(optarg, &end);
855 if (*end != '\0' || interval <= 0)
856 errx(EX_USAGE, "ERROR: Illegal wait interval "
857 "value \"%s\".", optarg);
858 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
859 args.pa_interval = interval;
862 case 'W': /* toggle LOG_CSW */
863 do_logproccsw = !do_logproccsw;
864 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
865 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
869 graphdepth = strtod(optarg, &end);
870 if (*end != '\0' || graphdepth <= 0)
871 errx(EX_USAGE, "ERROR: Illegal callchain "
872 "depth \"%s\".", optarg);
873 args.pa_graphdepth = graphdepth;
874 args.pa_required |= FLAG_DO_CALLGRAPHS;
879 pmcstat_show_usage();
884 args.pa_argc = (argc -= optind);
885 args.pa_argv = (argv += optind);
887 /* If we read from logfile and no specified CPU mask use
888 * the maximum CPU count.
890 if ((args.pa_flags & FLAG_READ_LOGFILE) &&
891 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0)
894 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
896 if (argc) /* command line present */
897 args.pa_flags |= FLAG_HAS_COMMANDLINE;
899 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS |
900 FLAG_DO_ANNOTATE | FLAG_DO_TOP))
901 args.pa_flags |= FLAG_DO_ANALYSIS;
904 * Check invocation syntax.
907 /* disallow -O and -R together */
908 if (args.pa_outputpath && args.pa_inputpath)
909 errx(EX_USAGE, "ERROR: options -O and -R are mutually "
912 /* -m option is allowed with -R only. */
913 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL)
914 errx(EX_USAGE, "ERROR: option -m requires an input file");
916 /* -m option is not allowed combined with -g or -G. */
917 if (args.pa_flags & FLAG_DO_ANNOTATE &&
918 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
919 errx(EX_USAGE, "ERROR: option -m and -g | -G are mutually "
922 if (args.pa_flags & FLAG_READ_LOGFILE) {
924 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
925 errmsg = "a command line specification";
926 else if (args.pa_flags & FLAG_HAS_TARGET)
927 errmsg = "option -t";
928 else if (!STAILQ_EMPTY(&args.pa_events))
929 errmsg = "a PMC event specification";
931 errx(EX_USAGE, "ERROR: option -R may not be used with "
933 } else if (STAILQ_EMPTY(&args.pa_events))
934 /* All other uses require a PMC spec. */
935 pmcstat_show_usage();
937 /* check for -t pid without a process PMC spec */
938 if ((args.pa_required & FLAG_HAS_TARGET) &&
939 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
940 errx(EX_USAGE, "ERROR: option -t requires a process mode PMC "
943 /* check for process-mode options without a command or -t pid */
944 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
945 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
946 errx(EX_USAGE, "ERROR: options -d, -E, -p, -P, and -W require "
947 "a command line or target process.");
949 /* check for -p | -P without a target process of some sort */
950 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) &&
951 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
952 errx(EX_USAGE, "ERROR: options -P and -p require a "
953 "target process or a command line.");
955 /* check for process-mode options without a process-mode PMC */
956 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
957 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
958 errx(EX_USAGE, "ERROR: options -d, -E, and -W require a "
959 "process mode PMC to be specified.");
961 /* check for -c cpu with no system mode PMCs or logfile. */
962 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
963 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
964 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
965 errx(EX_USAGE, "ERROR: option -c requires at least one "
966 "system mode PMC to be specified.");
968 /* check for counting mode options without a counting PMC */
969 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
970 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
971 errx(EX_USAGE, "ERROR: options -C, -W and -o require at "
972 "least one counting mode PMC to be specified.");
974 /* check for sampling mode options without a sampling PMC spec */
975 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
976 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
977 errx(EX_USAGE, "ERROR: options -N, -n and -O require at "
978 "least one sampling mode PMC to be specified.");
980 /* check if -g/-G/-m/-T are being used correctly */
981 if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
982 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
983 errx(EX_USAGE, "ERROR: options -g/-G/-m/-T require sampling PMCs "
984 "or -R to be specified.");
986 /* check if -O was spuriously specified */
987 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) &&
988 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0)
990 "ERROR: option -O is used only with options "
991 "-E, -P, -S and -W.");
993 /* -k kernel path require -g/-G/-m/-T or -R */
994 if ((args.pa_flags & FLAG_HAS_KERNELPATH) &&
995 (args.pa_flags & FLAG_DO_ANALYSIS) == 0 &&
996 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
997 errx(EX_USAGE, "ERROR: option -k is only used with -g/-R/-m/-T.");
999 /* -D only applies to gprof output mode (-g) */
1000 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) &&
1001 (args.pa_flags & FLAG_DO_GPROF) == 0)
1002 errx(EX_USAGE, "ERROR: option -D is only used with -g.");
1004 /* -M mapfile requires -g or -R */
1005 if (args.pa_mapfilename != NULL &&
1006 (args.pa_flags & FLAG_DO_GPROF) == 0 &&
1007 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
1008 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R.");
1011 * Disallow textual output of sampling PMCs if counting PMCs
1012 * have also been asked for, mostly because the combined output
1013 * is difficult to make sense of.
1015 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1016 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1017 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0))
1018 errx(EX_USAGE, "ERROR: option -O is required if counting and "
1019 "sampling PMCs are specified together.");
1022 * Check if "-k kerneldir" was specified, and if whether
1023 * 'kerneldir' actually refers to a a file. If so, use
1024 * `dirname path` to determine the kernel directory.
1026 if (args.pa_flags & FLAG_HAS_KERNELPATH) {
1027 (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot,
1029 if (stat(buffer, &sb) < 0)
1030 err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"",
1032 if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode))
1033 errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.",
1035 if (!S_ISDIR(sb.st_mode)) {
1036 tmp = args.pa_kernel;
1037 args.pa_kernel = strdup(dirname(args.pa_kernel));
1039 (void) snprintf(buffer, sizeof(buffer), "%s%s",
1040 args.pa_fsroot, args.pa_kernel);
1041 if (stat(buffer, &sb) < 0)
1042 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
1044 if (!S_ISDIR(sb.st_mode))
1045 errx(EX_USAGE, "ERROR: \"%s\" is not a "
1046 "directory.", buffer);
1051 * If we have a callgraph be created, select the outputfile.
1053 if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
1054 if (strcmp(graphfilename, "-") == 0)
1055 args.pa_graphfile = args.pa_printfile;
1057 args.pa_graphfile = fopen(graphfilename, "w");
1058 if (args.pa_graphfile == NULL)
1059 err(EX_OSERR, "ERROR: cannot open \"%s\" "
1060 "for writing", graphfilename);
1063 if (args.pa_flags & FLAG_DO_ANNOTATE) {
1064 args.pa_graphfile = fopen(graphfilename, "w");
1065 if (args.pa_graphfile == NULL)
1066 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing",
1070 /* if we've been asked to process a log file, skip init */
1071 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) {
1074 "ERROR: Initialization of the pmc(3) library failed");
1076 if ((npmc = pmc_npmc(0)) < 0) /* assume all CPUs are identical */
1077 err(EX_OSERR, "ERROR: Cannot determine the number of PMCs "
1081 /* Allocate a kqueue */
1082 if ((pmcstat_kq = kqueue()) < 0)
1083 err(EX_OSERR, "ERROR: Cannot allocate kqueue");
1085 /* Setup the logfile as the source. */
1086 if (args.pa_flags & FLAG_READ_LOGFILE) {
1088 * Print the log in textual form if we haven't been
1089 * asked to generate profiling information.
1091 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
1092 args.pa_flags |= FLAG_DO_PRINT;
1094 pmcstat_initialize_logging();
1095 rfd = pmcstat_open_log(args.pa_inputpath,
1096 PMCSTAT_OPEN_FOR_READ);
1097 if ((args.pa_logparser = pmclog_open(rfd)) == NULL)
1098 err(EX_OSERR, "ERROR: Cannot create parser");
1099 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0)
1100 err(EX_OSERR, "ERROR: fcntl(2) failed");
1101 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD,
1103 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1104 err(EX_OSERR, "ERROR: Cannot register kevent");
1107 * Configure the specified log file or setup a default log
1108 * consumer via a pipe.
1110 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) {
1111 if (args.pa_outputpath)
1112 args.pa_logfd = pmcstat_open_log(args.pa_outputpath,
1113 PMCSTAT_OPEN_FOR_WRITE);
1116 * process the log on the fly by reading it in
1119 if (pipe(pipefd) < 0)
1120 err(EX_OSERR, "ERROR: pipe(2) failed");
1122 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0)
1123 err(EX_OSERR, "ERROR: fcntl(2) failed");
1125 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
1128 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1129 err(EX_OSERR, "ERROR: Cannot register kevent");
1131 args.pa_logfd = pipefd[WRITEPIPEFD];
1133 args.pa_flags |= FLAG_HAS_PIPE;
1134 if ((args.pa_flags & FLAG_DO_TOP) == 0)
1135 args.pa_flags |= FLAG_DO_PRINT;
1136 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
1139 if (pmc_configure_logfile(args.pa_logfd) < 0)
1140 err(EX_OSERR, "ERROR: Cannot configure log file");
1143 /* remember to check for driver errors if we are sampling or logging */
1144 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) ||
1145 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE);
1148 if (args.pa_flags & FLAG_READ_LOGFILE) {
1152 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1153 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
1154 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid) < 0)
1155 err(EX_OSERR, "ERROR: Cannot allocate %s-mode pmc with "
1156 "specification \"%s\"",
1157 PMC_IS_SYSTEM_MODE(ev->ev_mode) ? "system" : "process",
1160 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
1161 pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
1162 err(EX_OSERR, "ERROR: Cannot set sampling count "
1163 "for PMC \"%s\"", ev->ev_name);
1166 /* compute printout widths */
1167 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1172 (void) pmc_width(ev->ev_pmcid, &counter_width);
1173 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */
1174 display_width = (int) floor(counter_width / 3.32193) + 1;
1176 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
1177 header_width += 3; /* 2 digit CPU number + '/' */
1179 if (header_width > display_width) {
1180 ev->ev_fieldskip = 0;
1181 ev->ev_fieldwidth = header_width;
1183 ev->ev_fieldskip = display_width -
1185 ev->ev_fieldwidth = display_width;
1190 * If our output is being set to a terminal, register a handler
1191 * for window size changes.
1194 if (isatty(fileno(args.pa_printfile))) {
1196 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0)
1197 err(EX_OSERR, "ERROR: Cannot determine window size");
1199 pmcstat_displayheight = ws.ws_row - 1;
1200 pmcstat_displaywidth = ws.ws_col - 1;
1202 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1204 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1205 err(EX_OSERR, "ERROR: Cannot register kevent for "
1212 * Listen to key input in top mode.
1214 if (args.pa_flags & FLAG_DO_TOP) {
1215 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL);
1216 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1217 err(EX_OSERR, "ERROR: Cannot register kevent");
1220 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1221 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1222 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
1224 EV_SET(&kev, SIGIO, 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 SIGIO");
1229 * An exec() failure of a forked child is signalled by the
1230 * child sending the parent a SIGCHLD. We don't register an
1231 * actual signal handler for SIGCHLD, but instead use our
1232 * kqueue to pick up the signal.
1234 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1235 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1236 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD");
1239 * Setup a timer if we have counting mode PMCs needing to be printed or
1240 * top mode plugin is active.
1242 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1243 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) ||
1244 (args.pa_flags & FLAG_DO_TOP)) {
1245 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1246 args.pa_interval * 1000, NULL);
1248 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1249 err(EX_OSERR, "ERROR: Cannot register kevent for "
1253 /* attach PMCs to the target process, starting it if specified */
1254 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1255 pmcstat_create_process();
1257 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0)
1258 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics");
1260 /* Attach process pmcs to the target process. */
1261 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) {
1262 if (SLIST_EMPTY(&args.pa_targets))
1263 errx(EX_DATAERR, "ERROR: No matching target "
1265 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS)
1266 pmcstat_attach_pmcs();
1269 kvm_close(pmcstat_kvm);
1274 /* start the pmcs */
1275 pmcstat_start_pmcs();
1277 /* start the (commandline) process if needed */
1278 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1279 pmcstat_start_process();
1281 /* initialize logging */
1282 pmcstat_initialize_logging();
1284 /* Handle SIGINT using the kqueue loop */
1285 sa.sa_handler = SIG_IGN;
1287 (void) sigemptyset(&sa.sa_mask);
1289 if (sigaction(SIGINT, &sa, NULL) < 0)
1290 err(EX_OSERR, "ERROR: Cannot install signal handler");
1293 * Setup the top mode display.
1295 if (args.pa_flags & FLAG_DO_TOP) {
1296 args.pa_flags &= ~FLAG_DO_PRINT;
1298 if (args.pa_toptty) {
1303 if(has_colors() == TRUE) {
1304 args.pa_topcolor = 1;
1306 use_default_colors();
1307 pair_content(0, &cf, &cb);
1308 init_pair(1, COLOR_RED, cb);
1309 init_pair(2, COLOR_YELLOW, cb);
1310 init_pair(3, COLOR_GREEN, cb);
1316 intrflush(stdscr, FALSE);
1317 keypad(stdscr, TRUE);
1319 /* Get terminal width / height with ncurses. */
1320 getmaxyx(stdscr, pmcstat_displayheight, pmcstat_displaywidth);
1321 pmcstat_displayheight--; pmcstat_displaywidth--;
1322 atexit(pmcstat_topexit);
1327 * loop till either the target process (if any) exits, or we
1328 * are killed by a SIGINT.
1330 runstate = PMCSTAT_RUNNING;
1333 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
1335 err(EX_OSERR, "ERROR: kevent failed");
1340 if (kev.flags & EV_ERROR)
1341 errc(EX_OSERR, kev.data, "ERROR: kevent failed");
1343 switch (kev.filter) {
1344 case EVFILT_PROC: /* target has exited */
1345 runstate = pmcstat_close_log();
1349 case EVFILT_READ: /* log file data is present */
1350 if (kev.ident == (unsigned)fileno(stdin) &&
1351 (args.pa_flags & FLAG_DO_TOP)) {
1352 if (pmcstat_keypress_log())
1353 runstate = pmcstat_close_log();
1355 runstate = pmcstat_process_log();
1359 if (kev.ident == SIGCHLD) {
1361 * The child process sends us a
1362 * SIGCHLD if its exec() failed. We
1363 * wait for it to exit and then exit
1367 runstate = PMCSTAT_FINISHED;
1368 } else if (kev.ident == SIGIO) {
1370 * We get a SIGIO if a PMC loses all
1371 * of its targets, or if logfile
1372 * writes encounter an error.
1374 runstate = pmcstat_close_log();
1375 do_print = 1; /* print PMCs at exit */
1376 } else if (kev.ident == SIGINT) {
1377 /* Kill the child process if we started it */
1378 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1379 pmcstat_kill_process();
1380 /* Close the pipe to self, if present. */
1381 if (args.pa_flags & FLAG_HAS_PIPE)
1382 (void) close(pipefd[READPIPEFD]);
1383 runstate = pmcstat_close_log();
1384 } else if (kev.ident == SIGWINCH) {
1385 if (ioctl(fileno(args.pa_printfile),
1386 TIOCGWINSZ, &ws) < 0)
1387 err(EX_OSERR, "ERROR: Cannot determine "
1389 pmcstat_displayheight = ws.ws_row - 1;
1390 pmcstat_displaywidth = ws.ws_col - 1;
1396 case EVFILT_TIMER: /* print out counting PMCs */
1403 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) {
1404 pmcstat_print_pmcs();
1405 if (runstate == PMCSTAT_FINISHED && /* final newline */
1406 (args.pa_flags & FLAG_DO_PRINT) == 0)
1407 (void) fprintf(args.pa_printfile, "\n");
1409 if (args.pa_flags & FLAG_DO_TOP)
1410 pmcstat_display_log();
1414 } while (runstate != PMCSTAT_FINISHED);
1416 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) {
1421 /* flush any pending log entries */
1422 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE))
1423 pmc_flush_logfile();
1427 free(args.pa_kernel);
1429 /* check if the driver lost any samples or events */
1430 if (check_driver_stats) {
1431 if (pmc_get_driver_stats(&ds_end) < 0)
1432 err(EX_OSERR, "ERROR: Cannot retrieve driver "
1434 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
1435 args.pa_verbosity > 0)
1436 warnx("WARNING: some samples were dropped. Please "
1437 "consider tuning the \"kern.hwpmc.nsamples\" "
1439 if (ds_start.pm_buffer_requests_failed !=
1440 ds_end.pm_buffer_requests_failed &&
1441 args.pa_verbosity > 0)
1442 warnx("WARNING: some events were discarded. Please "
1443 "consider tuning the \"kern.hwpmc.nbuffers\" "