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)
160 "ERROR: Illegal CPU specification \"%s\".",
162 CPU_SET(cpu, cpumask);
163 s = end + strspn(end, ", \t");
168 pmcstat_attach_pmcs(void)
170 struct pmcstat_ev *ev;
171 struct pmcstat_target *pt;
174 /* Attach all process PMCs to target processes. */
176 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
177 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
179 SLIST_FOREACH(pt, &args.pa_targets, pt_next)
180 if (pmc_attach(ev->ev_pmcid, pt->pt_pid) == 0)
182 else if (errno != ESRCH)
184 "ERROR: cannot attach pmc \"%s\" to process %d",
185 ev->ev_name, (int)pt->pt_pid);
189 errx(EX_DATAERR, "ERROR: No processes were attached to.");
194 pmcstat_cleanup(void)
196 struct pmcstat_ev *ev, *tmp;
198 /* release allocated PMCs. */
199 STAILQ_FOREACH_SAFE(ev, &args.pa_events, ev_next, tmp)
200 if (ev->ev_pmcid != PMC_ID_INVALID) {
201 if (pmc_stop(ev->ev_pmcid) < 0)
202 err(EX_OSERR, "ERROR: cannot stop pmc 0x%x \"%s\"",
203 ev->ev_pmcid, ev->ev_name);
204 if (pmc_release(ev->ev_pmcid) < 0)
205 err(EX_OSERR, "ERROR: cannot release pmc 0x%x \"%s\"",
206 ev->ev_pmcid, ev->ev_name);
209 STAILQ_REMOVE(&args.pa_events, ev, pmcstat_ev, ev_next);
213 /* de-configure the log file if present. */
214 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE))
215 (void) pmc_configure_logfile(-1);
217 if (args.pa_logparser) {
218 pmclog_close(args.pa_logparser);
219 args.pa_logparser = NULL;
222 pmcstat_shutdown_logging();
226 pmcstat_create_process(void)
231 struct pmcstat_target *pt;
233 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pmcstat_sockpair) < 0)
234 err(EX_OSERR, "ERROR: cannot create socket pair");
236 switch (pid = fork()) {
238 err(EX_OSERR, "ERROR: cannot fork");
242 (void) close(pmcstat_sockpair[PARENTSOCKET]);
244 /* Write a token to tell our parent we've started executing. */
245 if (write(pmcstat_sockpair[CHILDSOCKET], "+", 1) != 1)
246 err(EX_OSERR, "ERROR (child): cannot write token");
248 /* Wait for our parent to signal us to start. */
249 if (read(pmcstat_sockpair[CHILDSOCKET], &token, 1) < 0)
250 err(EX_OSERR, "ERROR (child): cannot read token");
251 (void) close(pmcstat_sockpair[CHILDSOCKET]);
253 /* exec() the program requested */
254 execvp(*args.pa_argv, args.pa_argv);
255 /* and if that fails, notify the parent */
256 kill(getppid(), SIGCHLD);
257 err(EX_OSERR, "ERROR: execvp \"%s\" failed", *args.pa_argv);
260 default: /* parent */
261 (void) close(pmcstat_sockpair[CHILDSOCKET]);
265 /* Ask to be notified via a kevent when the target process exits. */
266 EV_SET(&kev, pid, EVFILT_PROC, EV_ADD|EV_ONESHOT, NOTE_EXIT, 0,
268 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
269 err(EX_OSERR, "ERROR: cannot monitor child process %d", pid);
271 if ((pt = malloc(sizeof(*pt))) == NULL)
272 errx(EX_SOFTWARE, "ERROR: Out of memory.");
275 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
277 /* Wait for the child to signal that its ready to go. */
278 if (read(pmcstat_sockpair[PARENTSOCKET], &token, 1) < 0)
279 err(EX_OSERR, "ERROR (parent): cannot read token");
285 pmcstat_find_targets(const char *spec)
287 int n, nproc, pid, rv;
288 struct pmcstat_target *pt;
289 char errbuf[_POSIX2_LINE_MAX], *end;
290 static struct kinfo_proc *kp;
294 /* First check if we've been given a process id. */
295 pid = strtol(spec, &end, 0);
296 if (end != spec && pid >= 0) {
297 if ((pt = malloc(sizeof(*pt))) == NULL)
300 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
304 /* Otherwise treat arg as a regular expression naming processes. */
305 if (pmcstat_kvm == NULL) {
306 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0,
308 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"",
310 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC,
312 err(EX_OSERR, "ERROR: Cannot get process list: %s",
313 kvm_geterr(pmcstat_kvm));
317 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) {
318 regerror(rv, ®, errbuf, sizeof(errbuf));
319 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s",
323 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) {
324 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) {
325 if ((pt = malloc(sizeof(*pt))) == NULL)
327 pt->pt_pid = kp->ki_pid;
328 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
329 } else if (rv != REG_NOMATCH) {
330 regerror(rv, ®, errbuf, sizeof(errbuf));
331 errx(EX_SOFTWARE, "ERROR: Regex evalation failed: %s",
341 errx(EX_SOFTWARE, "Out of memory.");
346 pmcstat_kill_process(void)
348 struct pmcstat_target *pt;
350 assert(args.pa_flags & FLAG_HAS_COMMANDLINE);
353 * If a command line was specified, it would be the very first
354 * in the list, before any other processes specified by -t.
356 pt = SLIST_FIRST(&args.pa_targets);
359 if (kill(pt->pt_pid, SIGINT) != 0)
360 err(EX_OSERR, "ERROR: cannot signal child process");
364 pmcstat_start_pmcs(void)
366 struct pmcstat_ev *ev;
368 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
370 assert(ev->ev_pmcid != PMC_ID_INVALID);
372 if (pmc_start(ev->ev_pmcid) < 0) {
373 warn("ERROR: Cannot start pmc 0x%x \"%s\"",
374 ev->ev_pmcid, ev->ev_name);
383 pmcstat_print_headers(void)
385 struct pmcstat_ev *ev;
388 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX);
390 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
391 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
394 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
396 if (ev->ev_fieldskip != 0)
397 (void) fprintf(args.pa_printfile, "%*s",
398 ev->ev_fieldskip, "");
399 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2;
402 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ",
403 ev->ev_cpu, w-3, ev->ev_name);
405 (void) fprintf(args.pa_printfile, "p/%*s ", w,
409 (void) fflush(args.pa_printfile);
413 pmcstat_print_counters(void)
416 struct pmcstat_ev *ev;
419 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
421 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
423 /* skip sampling mode counters */
424 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
427 if (pmc_read(ev->ev_pmcid, &value) < 0)
428 err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"",
431 (void) fprintf(args.pa_printfile, "%*ju ",
432 ev->ev_fieldwidth + extra_width,
433 (uintmax_t) ev->ev_cumulative ? value :
434 (value - ev->ev_saved));
436 if (ev->ev_cumulative == 0)
437 ev->ev_saved = value;
441 (void) fflush(args.pa_printfile);
449 pmcstat_print_pmcs(void)
451 static int linecount = 0;
453 /* check if we need to print a header line */
454 if (++linecount > pmcstat_displayheight) {
455 (void) fprintf(args.pa_printfile, "\n");
459 pmcstat_print_headers();
460 (void) fprintf(args.pa_printfile, "\n");
462 pmcstat_print_counters();
468 * Do process profiling
470 * If a pid was specified, attach each allocated PMC to the target
471 * process. Otherwise, fork a child and attach the PMCs to the child,
472 * and have the child exec() the target program.
476 pmcstat_start_process(void)
478 /* Signal the child to proceed. */
479 if (write(pmcstat_sockpair[PARENTSOCKET], "!", 1) != 1)
480 err(EX_OSERR, "ERROR (parent): write of token failed");
482 (void) close(pmcstat_sockpair[PARENTSOCKET]);
486 pmcstat_show_usage(void)
489 "[options] [commandline]\n"
490 "\t Measure process and/or system performance using hardware\n"
491 "\t performance monitoring counters.\n"
492 "\t Options include:\n"
493 "\t -C\t\t (toggle) show cumulative counts\n"
494 "\t -D path\t create profiles in directory \"path\"\n"
495 "\t -E\t\t (toggle) show counts at process exit\n"
496 "\t -F file\t write a system-wide callgraph (Kcachegrind format)"
498 "\t -G file\t write a system-wide callgraph to \"file\"\n"
499 "\t -M file\t print executable/gmon file map to \"file\"\n"
500 "\t -N\t\t (toggle) capture callchains\n"
501 "\t -O file\t send log output to \"file\"\n"
502 "\t -P spec\t allocate a process-private sampling PMC\n"
503 "\t -R file\t read events from \"file\"\n"
504 "\t -S spec\t allocate a system-wide sampling PMC\n"
505 "\t -T\t\t start in top mode\n"
506 "\t -W\t\t (toggle) show counts per context switch\n"
507 "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n"
508 "\t -d\t\t (toggle) track descendants\n"
509 "\t -f spec\t pass \"spec\" to as plugin option\n"
510 "\t -g\t\t produce gprof(1) compatible profiles\n"
511 "\t -k dir\t\t set the path to the kernel\n"
512 "\t -l secs\t set duration time\n"
513 "\t -m file\t print sampled PCs to \"file\"\n"
514 "\t -n rate\t set sampling rate\n"
515 "\t -o file\t send print output to \"file\"\n"
516 "\t -p spec\t allocate a process-private counting PMC\n"
517 "\t -q\t\t suppress verbosity\n"
518 "\t -r fsroot\t specify FS root directory\n"
519 "\t -s spec\t allocate a system-wide counting PMC\n"
520 "\t -t process-spec attach to running processes matching "
522 "\t -v\t\t increase verbosity\n"
523 "\t -w secs\t set printing time interval\n"
524 "\t -z depth\t limit callchain display depth"
529 * At exit handler for top mode
533 pmcstat_topexit(void)
551 main(int argc, char **argv)
556 int hcpu, option, npmc, ncpu;
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;
566 const char *errmsg, *graphfilename;
567 enum pmcstat_state runstate;
568 struct pmc_driverstats ds_start, ds_end;
569 struct pmcstat_ev *ev;
574 char buffer[PATH_MAX];
576 check_driver_stats = 0;
578 current_sampling_count = DEFAULT_SAMPLE_COUNT;
583 use_cumulative_counts = 0;
585 args.pa_required = 0;
587 args.pa_verbosity = 1;
590 args.pa_kernel = strdup("/boot/kernel");
591 args.pa_samplesdir = ".";
592 args.pa_printfile = stderr;
593 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
594 args.pa_graphfile = NULL;
595 args.pa_interval = DEFAULT_WAIT_INTERVAL;
596 args.pa_mapfilename = NULL;
597 args.pa_inputpath = NULL;
598 args.pa_outputpath = NULL;
599 args.pa_pplugin = PMCSTAT_PL_NONE;
600 args.pa_plugin = PMCSTAT_PL_NONE;
601 args.pa_ctdumpinstr = 1;
602 args.pa_topmode = PMCSTAT_TOP_DELTA;
604 args.pa_topcolor = 0;
605 args.pa_mergepmc = 0;
606 args.pa_duration = 0.0;
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));
615 * The initial CPU mask specifies all non-halted CPUS in the
619 if (sysctlbyname("hw.ncpu", &ncpu, &dummy, NULL, 0) < 0)
620 err(EX_OSERR, "ERROR: Cannot determine the number of CPUs");
621 for (hcpu = 0; hcpu < ncpu; hcpu++)
622 CPU_SET(hcpu, &cpumask);
624 while ((option = getopt(argc, argv,
625 "CD:EF:G:M:NO:P:R:S:TWc:df:gk:l:m:n:o:p:qr:s:t:vw:z:")) != -1)
627 case 'C': /* cumulative values */
628 use_cumulative_counts = !use_cumulative_counts;
629 args.pa_required |= FLAG_HAS_COUNTING_PMCS;
634 if (optarg[0] == '*' && optarg[1] == '\0') {
635 for (hcpu = 0; hcpu < ncpu; hcpu++)
636 CPU_SET(hcpu, &cpumask);
638 pmcstat_get_cpumask(optarg, &cpumask);
640 args.pa_flags |= FLAGS_HAS_CPUMASK;
641 args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
645 if (stat(optarg, &sb) < 0)
646 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
648 if (!S_ISDIR(sb.st_mode))
650 "ERROR: \"%s\" is not a directory.",
652 args.pa_samplesdir = optarg;
653 args.pa_flags |= FLAG_HAS_SAMPLESDIR;
654 args.pa_required |= FLAG_DO_GPROF;
657 case 'd': /* toggle descendents */
658 do_descendants = !do_descendants;
659 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
662 case 'F': /* produce a system-wide calltree */
663 args.pa_flags |= FLAG_DO_CALLGRAPHS;
664 args.pa_plugin = PMCSTAT_PL_CALLTREE;
665 graphfilename = optarg;
668 case 'f': /* plugins options */
669 if (args.pa_plugin == PMCSTAT_PL_NONE)
670 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T.");
671 pmcstat_pluginconfigure_log(optarg);
674 case 'G': /* produce a system-wide callgraph */
675 args.pa_flags |= FLAG_DO_CALLGRAPHS;
676 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
677 graphfilename = optarg;
680 case 'g': /* produce gprof compatible profiles */
681 args.pa_flags |= FLAG_DO_GPROF;
682 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH;
683 args.pa_plugin = PMCSTAT_PL_GPROF;
686 case 'k': /* pathname to the kernel */
687 free(args.pa_kernel);
688 args.pa_kernel = strdup(optarg);
689 args.pa_required |= FLAG_DO_ANALYSIS;
690 args.pa_flags |= FLAG_HAS_KERNELPATH;
693 case 'l': /* time duration in seconds */
694 duration = strtod(optarg, &end);
695 if (*end != '\0' || duration <= 0)
696 errx(EX_USAGE, "ERROR: Illegal duration time "
697 "value \"%s\".", optarg);
698 args.pa_flags |= FLAG_HAS_DURATION;
699 args.pa_duration = duration;
703 args.pa_flags |= FLAG_DO_ANNOTATE;
704 args.pa_plugin = PMCSTAT_PL_ANNOTATE;
705 graphfilename = optarg;
708 case 'E': /* log process exit */
709 do_logprocexit = !do_logprocexit;
710 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
711 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
714 case 'M': /* mapfile */
715 args.pa_mapfilename = optarg;
719 do_callchain = !do_callchain;
720 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
723 case 'p': /* process virtual counting PMC */
724 case 's': /* system-wide counting PMC */
725 case 'P': /* process virtual sampling PMC */
726 case 'S': /* system-wide sampling PMC */
727 if ((ev = malloc(sizeof(*ev))) == NULL)
728 errx(EX_SOFTWARE, "ERROR: Out of memory.");
731 case 'p': ev->ev_mode = PMC_MODE_TC; break;
732 case 's': ev->ev_mode = PMC_MODE_SC; break;
733 case 'P': ev->ev_mode = PMC_MODE_TS; break;
734 case 'S': ev->ev_mode = PMC_MODE_SS; break;
737 if (option == 'P' || option == 'p') {
738 args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
739 args.pa_required |= (FLAG_HAS_COMMANDLINE |
743 if (option == 'P' || option == 'S') {
744 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
745 args.pa_required |= (FLAG_HAS_PIPE |
746 FLAG_HAS_OUTPUT_LOGFILE);
749 if (option == 'p' || option == 's')
750 args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
752 if (option == 's' || option == 'S')
753 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
755 ev->ev_spec = strdup(optarg);
757 if (option == 'S' || option == 'P')
758 ev->ev_count = current_sampling_count;
762 if (option == 'S' || option == 's') {
763 hcpu = sizeof(cpumask) * NBBY;
764 for (hcpu--; hcpu >= 0; hcpu--)
765 if (CPU_ISSET(hcpu, &cpumask))
769 ev->ev_cpu = PMC_CPU_ANY;
773 ev->ev_flags |= PMC_F_CALLCHAIN;
775 ev->ev_flags |= PMC_F_DESCENDANTS;
777 ev->ev_flags |= PMC_F_LOG_PROCEXIT;
779 ev->ev_flags |= PMC_F_LOG_PROCCSW;
781 ev->ev_cumulative = use_cumulative_counts;
784 ev->ev_pmcid = PMC_ID_INVALID;
786 /* extract event name */
787 c = strcspn(optarg, ", \t");
788 ev->ev_name = malloc(c + 1);
789 (void) strncpy(ev->ev_name, optarg, c);
790 *(ev->ev_name + c) = '\0';
792 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next);
794 if (option == 's' || option == 'S') {
795 hcpu = CPU_ISSET(ev->ev_cpu, &cpumask);
796 CPU_CLR(ev->ev_cpu, &cpumask);
797 pmcstat_clone_event_descriptor(ev, &cpumask);
799 CPU_SET(ev->ev_cpu, &cpumask);
804 case 'n': /* sampling count */
805 current_sampling_count = strtol(optarg, &end, 0);
806 if (*end != '\0' || current_sampling_count <= 0)
808 "ERROR: Illegal count value \"%s\".",
810 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
813 case 'o': /* outputfile */
814 if (args.pa_printfile != NULL &&
815 args.pa_printfile != stdout &&
816 args.pa_printfile != stderr)
817 (void) fclose(args.pa_printfile);
818 if ((args.pa_printfile = fopen(optarg, "w")) == NULL)
820 "ERROR: cannot open \"%s\" for writing.",
822 args.pa_flags |= FLAG_DO_PRINT;
825 case 'O': /* sampling output */
826 if (args.pa_outputpath)
828 "ERROR: option -O may only be specified once.");
829 args.pa_outputpath = optarg;
830 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE;
833 case 'q': /* quiet mode */
834 args.pa_verbosity = 0;
837 case 'r': /* root FS path */
838 args.pa_fsroot = optarg;
841 case 'R': /* read an existing log file */
842 if (args.pa_inputpath != NULL)
844 "ERROR: option -R may only be specified once.");
845 args.pa_inputpath = optarg;
846 if (args.pa_printfile == stderr)
847 args.pa_printfile = stdout;
848 args.pa_flags |= FLAG_READ_LOGFILE;
851 case 't': /* target pid or process name */
852 pmcstat_find_targets(optarg);
854 args.pa_flags |= FLAG_HAS_TARGET;
855 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
858 case 'T': /* top mode */
859 args.pa_flags |= FLAG_DO_TOP;
860 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
861 args.pa_ctdumpinstr = 0;
862 args.pa_mergepmc = 1;
863 if (args.pa_printfile == stderr)
864 args.pa_printfile = stdout;
867 case 'v': /* verbose */
871 case 'w': /* wait interval */
872 interval = strtod(optarg, &end);
873 if (*end != '\0' || interval <= 0)
875 "ERROR: Illegal wait interval value \"%s\".",
877 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
878 args.pa_interval = interval;
881 case 'W': /* toggle LOG_CSW */
882 do_logproccsw = !do_logproccsw;
883 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
884 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
888 graphdepth = strtod(optarg, &end);
889 if (*end != '\0' || graphdepth <= 0)
891 "ERROR: Illegal callchain depth \"%s\".",
893 args.pa_graphdepth = graphdepth;
894 args.pa_required |= FLAG_DO_CALLGRAPHS;
899 pmcstat_show_usage();
904 args.pa_argc = (argc -= optind);
905 args.pa_argv = (argv += optind);
907 /* If we read from logfile and no specified CPU mask use
908 * the maximum CPU count.
910 if ((args.pa_flags & FLAG_READ_LOGFILE) &&
911 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0)
914 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
916 if (argc) /* command line present */
917 args.pa_flags |= FLAG_HAS_COMMANDLINE;
919 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS |
920 FLAG_DO_ANNOTATE | FLAG_DO_TOP))
921 args.pa_flags |= FLAG_DO_ANALYSIS;
924 * Check invocation syntax.
927 /* disallow -O and -R together */
928 if (args.pa_outputpath && args.pa_inputpath)
930 "ERROR: options -O and -R are mutually exclusive.");
932 /* disallow -T and -l together */
933 if ((args.pa_flags & FLAG_HAS_DURATION) &&
934 (args.pa_flags & FLAG_DO_TOP))
935 errx(EX_USAGE, "ERROR: options -T and -l are mutually "
938 /* -m option is allowed with -R only. */
939 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL)
940 errx(EX_USAGE, "ERROR: option -m requires an input file");
942 /* -m option is not allowed combined with -g or -G. */
943 if (args.pa_flags & FLAG_DO_ANNOTATE &&
944 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
946 "ERROR: option -m and -g | -G are mutually exclusive");
948 if (args.pa_flags & FLAG_READ_LOGFILE) {
950 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
951 errmsg = "a command line specification";
952 else if (args.pa_flags & FLAG_HAS_TARGET)
953 errmsg = "option -t";
954 else if (!STAILQ_EMPTY(&args.pa_events))
955 errmsg = "a PMC event specification";
958 "ERROR: option -R may not be used with %s.",
960 } else if (STAILQ_EMPTY(&args.pa_events))
961 /* All other uses require a PMC spec. */
962 pmcstat_show_usage();
964 /* check for -t pid without a process PMC spec */
965 if ((args.pa_required & FLAG_HAS_TARGET) &&
966 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
968 "ERROR: option -t requires a process mode PMC to be specified."
971 /* check for process-mode options without a command or -t pid */
972 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
973 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
975 "ERROR: options -d, -E, -p, -P, and -W require a command line or target process."
978 /* check for -p | -P without a target process of some sort */
979 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) &&
980 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
982 "ERROR: options -P and -p require a target process or a command line."
985 /* check for process-mode options without a process-mode PMC */
986 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
987 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
989 "ERROR: options -d, -E, and -W require a process mode PMC to be specified."
992 /* check for -c cpu with no system mode PMCs or logfile. */
993 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
994 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
995 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
997 "ERROR: option -c requires at least one system mode PMC to be specified."
1000 /* check for counting mode options without a counting PMC */
1001 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
1002 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
1004 "ERROR: options -C, -W and -o require at least one counting mode PMC to be specified."
1007 /* check for sampling mode options without a sampling PMC spec */
1008 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
1009 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
1011 "ERROR: options -N, -n and -O require at least one sampling mode PMC to be specified."
1014 /* check if -g/-G/-m/-T are being used correctly */
1015 if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
1016 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
1018 "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified."
1021 /* check if -O was spuriously specified */
1022 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) &&
1023 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0)
1025 "ERROR: option -O is used only with options -E, -P, -S and -W."
1028 /* -k kernel path require -g/-G/-m/-T or -R */
1029 if ((args.pa_flags & FLAG_HAS_KERNELPATH) &&
1030 (args.pa_flags & FLAG_DO_ANALYSIS) == 0 &&
1031 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
1032 errx(EX_USAGE, "ERROR: option -k is only used with -g/-R/-m/-T.");
1034 /* -D only applies to gprof output mode (-g) */
1035 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) &&
1036 (args.pa_flags & FLAG_DO_GPROF) == 0)
1037 errx(EX_USAGE, "ERROR: option -D is only used with -g.");
1039 /* -M mapfile requires -g or -R */
1040 if (args.pa_mapfilename != NULL &&
1041 (args.pa_flags & FLAG_DO_GPROF) == 0 &&
1042 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
1043 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R.");
1046 * Disallow textual output of sampling PMCs if counting PMCs
1047 * have also been asked for, mostly because the combined output
1048 * is difficult to make sense of.
1050 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1051 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1052 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0))
1054 "ERROR: option -O is required if counting and sampling PMCs are specified together."
1058 * Check if "-k kerneldir" was specified, and if whether
1059 * 'kerneldir' actually refers to a file. If so, use
1060 * `dirname path` to determine the kernel directory.
1062 if (args.pa_flags & FLAG_HAS_KERNELPATH) {
1063 (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot,
1065 if (stat(buffer, &sb) < 0)
1066 err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"",
1068 if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode))
1069 errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.",
1071 if (!S_ISDIR(sb.st_mode)) {
1072 tmp = args.pa_kernel;
1073 args.pa_kernel = strdup(dirname(args.pa_kernel));
1075 (void) snprintf(buffer, sizeof(buffer), "%s%s",
1076 args.pa_fsroot, args.pa_kernel);
1077 if (stat(buffer, &sb) < 0)
1078 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
1080 if (!S_ISDIR(sb.st_mode))
1082 "ERROR: \"%s\" is not a directory.",
1088 * If we have a callgraph be created, select the outputfile.
1090 if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
1091 if (strcmp(graphfilename, "-") == 0)
1092 args.pa_graphfile = args.pa_printfile;
1094 args.pa_graphfile = fopen(graphfilename, "w");
1095 if (args.pa_graphfile == NULL)
1097 "ERROR: cannot open \"%s\" for writing",
1101 if (args.pa_flags & FLAG_DO_ANNOTATE) {
1102 args.pa_graphfile = fopen(graphfilename, "w");
1103 if (args.pa_graphfile == NULL)
1104 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing",
1108 /* if we've been asked to process a log file, skip init */
1109 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) {
1112 "ERROR: Initialization of the pmc(3) library failed"
1115 if ((npmc = pmc_npmc(0)) < 0) /* assume all CPUs are identical */
1117 "ERROR: Cannot determine the number of PMCs on CPU %d",
1121 /* Allocate a kqueue */
1122 if ((pmcstat_kq = kqueue()) < 0)
1123 err(EX_OSERR, "ERROR: Cannot allocate kqueue");
1125 /* Setup the logfile as the source. */
1126 if (args.pa_flags & FLAG_READ_LOGFILE) {
1128 * Print the log in textual form if we haven't been
1129 * asked to generate profiling information.
1131 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
1132 args.pa_flags |= FLAG_DO_PRINT;
1134 pmcstat_initialize_logging();
1135 rfd = pmcstat_open_log(args.pa_inputpath,
1136 PMCSTAT_OPEN_FOR_READ);
1137 if ((args.pa_logparser = pmclog_open(rfd)) == NULL)
1138 err(EX_OSERR, "ERROR: Cannot create parser");
1139 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0)
1140 err(EX_OSERR, "ERROR: fcntl(2) failed");
1141 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD,
1143 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1144 err(EX_OSERR, "ERROR: Cannot register kevent");
1147 * Configure the specified log file or setup a default log
1148 * consumer via a pipe.
1150 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) {
1151 if (args.pa_outputpath)
1152 args.pa_logfd = pmcstat_open_log(args.pa_outputpath,
1153 PMCSTAT_OPEN_FOR_WRITE);
1156 * process the log on the fly by reading it in
1159 if (pipe(pipefd) < 0)
1160 err(EX_OSERR, "ERROR: pipe(2) failed");
1162 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0)
1163 err(EX_OSERR, "ERROR: fcntl(2) failed");
1165 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
1168 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1169 err(EX_OSERR, "ERROR: Cannot register kevent");
1171 args.pa_logfd = pipefd[WRITEPIPEFD];
1173 args.pa_flags |= FLAG_HAS_PIPE;
1174 if ((args.pa_flags & FLAG_DO_TOP) == 0)
1175 args.pa_flags |= FLAG_DO_PRINT;
1176 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
1179 if (pmc_configure_logfile(args.pa_logfd) < 0)
1180 err(EX_OSERR, "ERROR: Cannot configure log file");
1183 /* remember to check for driver errors if we are sampling or logging */
1184 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) ||
1185 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE);
1188 if (args.pa_flags & FLAG_READ_LOGFILE) {
1192 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1193 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
1194 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid) < 0)
1196 "ERROR: Cannot allocate %s-mode pmc with specification \"%s\"",
1197 PMC_IS_SYSTEM_MODE(ev->ev_mode) ?
1198 "system" : "process", ev->ev_spec);
1200 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
1201 pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
1203 "ERROR: Cannot set sampling count for PMC \"%s\"",
1207 /* compute printout widths */
1208 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1213 (void) pmc_width(ev->ev_pmcid, &counter_width);
1214 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */
1215 display_width = (int) floor(counter_width / 3.32193) + 1;
1217 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
1218 header_width += 3; /* 2 digit CPU number + '/' */
1220 if (header_width > display_width) {
1221 ev->ev_fieldskip = 0;
1222 ev->ev_fieldwidth = header_width;
1224 ev->ev_fieldskip = display_width -
1226 ev->ev_fieldwidth = display_width;
1231 * If our output is being set to a terminal, register a handler
1232 * for window size changes.
1235 if (isatty(fileno(args.pa_printfile))) {
1237 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0)
1238 err(EX_OSERR, "ERROR: Cannot determine window size");
1240 pmcstat_displayheight = ws.ws_row - 1;
1241 pmcstat_displaywidth = ws.ws_col - 1;
1243 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1245 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1247 "ERROR: Cannot register kevent for SIGWINCH");
1253 * Listen to key input in top mode.
1255 if (args.pa_flags & FLAG_DO_TOP) {
1256 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL);
1257 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1258 err(EX_OSERR, "ERROR: Cannot register kevent");
1261 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1262 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1263 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
1265 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1266 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1267 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO");
1270 * An exec() failure of a forked child is signalled by the
1271 * child sending the parent a SIGCHLD. We don't register an
1272 * actual signal handler for SIGCHLD, but instead use our
1273 * kqueue to pick up the signal.
1275 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1276 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1277 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD");
1280 * Setup a timer if we have counting mode PMCs needing to be printed or
1281 * top mode plugin is active.
1283 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1284 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) ||
1285 (args.pa_flags & FLAG_DO_TOP)) {
1286 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1287 args.pa_interval * 1000, NULL);
1289 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1291 "ERROR: Cannot register kevent for timer");
1295 * Setup a duration timer if we have sampling mode PMCs and
1296 * a duration time is set
1298 if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1299 (args.pa_flags & FLAG_HAS_DURATION)) {
1300 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1301 args.pa_duration * 1000, NULL);
1303 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1304 err(EX_OSERR, "ERROR: Cannot register kevent for "
1308 /* attach PMCs to the target process, starting it if specified */
1309 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1310 pmcstat_create_process();
1312 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0)
1313 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics");
1315 /* Attach process pmcs to the target process. */
1316 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) {
1317 if (SLIST_EMPTY(&args.pa_targets))
1319 "ERROR: No matching target processes.");
1320 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS)
1321 pmcstat_attach_pmcs();
1324 kvm_close(pmcstat_kvm);
1329 /* start the pmcs */
1330 pmcstat_start_pmcs();
1332 /* start the (commandline) process if needed */
1333 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1334 pmcstat_start_process();
1336 /* initialize logging */
1337 pmcstat_initialize_logging();
1339 /* Handle SIGINT using the kqueue loop */
1340 sa.sa_handler = SIG_IGN;
1342 (void) sigemptyset(&sa.sa_mask);
1344 if (sigaction(SIGINT, &sa, NULL) < 0)
1345 err(EX_OSERR, "ERROR: Cannot install signal handler");
1348 * Setup the top mode display.
1350 if (args.pa_flags & FLAG_DO_TOP) {
1351 args.pa_flags &= ~FLAG_DO_PRINT;
1353 if (args.pa_toptty) {
1358 if(has_colors() == TRUE) {
1359 args.pa_topcolor = 1;
1361 use_default_colors();
1362 pair_content(0, &cf, &cb);
1363 init_pair(1, COLOR_RED, cb);
1364 init_pair(2, COLOR_YELLOW, cb);
1365 init_pair(3, COLOR_GREEN, cb);
1371 intrflush(stdscr, FALSE);
1372 keypad(stdscr, TRUE);
1374 /* Get terminal width / height with ncurses. */
1376 pmcstat_displayheight, pmcstat_displaywidth);
1377 pmcstat_displayheight--; pmcstat_displaywidth--;
1378 atexit(pmcstat_topexit);
1383 * loop till either the target process (if any) exits, or we
1384 * are killed by a SIGINT or we reached the time duration.
1386 runstate = PMCSTAT_RUNNING;
1387 do_print = do_read = 0;
1389 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
1391 err(EX_OSERR, "ERROR: kevent failed");
1396 if (kev.flags & EV_ERROR)
1397 errc(EX_OSERR, kev.data, "ERROR: kevent failed");
1399 switch (kev.filter) {
1400 case EVFILT_PROC: /* target has exited */
1401 runstate = pmcstat_close_log();
1405 case EVFILT_READ: /* log file data is present */
1406 if (kev.ident == (unsigned)fileno(stdin) &&
1407 (args.pa_flags & FLAG_DO_TOP)) {
1408 if (pmcstat_keypress_log())
1409 runstate = pmcstat_close_log();
1412 runstate = pmcstat_process_log();
1417 if (kev.ident == SIGCHLD) {
1419 * The child process sends us a
1420 * SIGCHLD if its exec() failed. We
1421 * wait for it to exit and then exit
1425 runstate = PMCSTAT_FINISHED;
1426 } else if (kev.ident == SIGIO) {
1428 * We get a SIGIO if a PMC loses all
1429 * of its targets, or if logfile
1430 * writes encounter an error.
1432 runstate = pmcstat_close_log();
1433 do_print = 1; /* print PMCs at exit */
1434 } else if (kev.ident == SIGINT) {
1435 /* Kill the child process if we started it */
1436 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1437 pmcstat_kill_process();
1438 runstate = pmcstat_close_log();
1439 } else if (kev.ident == SIGWINCH) {
1440 if (ioctl(fileno(args.pa_printfile),
1441 TIOCGWINSZ, &ws) < 0)
1443 "ERROR: Cannot determine window size");
1444 pmcstat_displayheight = ws.ws_row - 1;
1445 pmcstat_displaywidth = ws.ws_col - 1;
1452 /* time duration reached, exit */
1453 if (args.pa_flags & FLAG_HAS_DURATION) {
1454 runstate = PMCSTAT_FINISHED;
1457 /* print out counting PMCs */
1458 if ((args.pa_flags & FLAG_DO_TOP) &&
1459 pmc_flush_logfile() == 0)
1466 if (do_print && !do_read) {
1467 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) {
1468 pmcstat_print_pmcs();
1469 if (runstate == PMCSTAT_FINISHED &&
1471 (args.pa_flags & FLAG_DO_PRINT) == 0)
1472 (void) fprintf(args.pa_printfile, "\n");
1474 if (args.pa_flags & FLAG_DO_TOP)
1475 pmcstat_display_log();
1479 } while (runstate != PMCSTAT_FINISHED);
1481 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) {
1486 /* flush any pending log entries */
1487 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE))
1488 pmc_close_logfile();
1492 free(args.pa_kernel);
1494 /* check if the driver lost any samples or events */
1495 if (check_driver_stats) {
1496 if (pmc_get_driver_stats(&ds_end) < 0)
1498 "ERROR: Cannot retrieve driver statistics");
1499 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
1500 args.pa_verbosity > 0)
1501 warnx("WARNING: some samples were dropped.\n"
1502 "Please consider tuning the \"kern.hwpmc.nsamples\" tunable."
1504 if (ds_start.pm_buffer_requests_failed !=
1505 ds_end.pm_buffer_requests_failed &&
1506 args.pa_verbosity > 0)
1507 warnx("WARNING: some events were discarded.\n"
1508 "Please consider tuning the \"kern.hwpmc.nbuffers\" tunable."