1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003-2008, Joseph Koshy
5 * Copyright (c) 2007 The FreeBSD Foundation
6 * All rights reserved.
7 *
8 * Portions of this software were developed by A. Joseph Koshy under
9 * sponsorship from the FreeBSD Foundation and Google, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/cpuset.h>
35 #include <sys/event.h>
36 #include <sys/queue.h>
37 #include <sys/socket.h>
38 #include <sys/stat.h>
39 #include <sys/sysctl.h>
40 #include <sys/time.h>
41 #include <sys/ttycom.h>
42 #include <sys/user.h>
43 #include <sys/wait.h>
44
45 #include <assert.h>
46 #include <curses.h>
47 #include <err.h>
48 #include <errno.h>
49 #include <fcntl.h>
50 #include <kvm.h>
51 #include <libgen.h>
52 #include <limits.h>
53 #include <math.h>
54 #include <pmc.h>
55 #include <pmclog.h>
56 #include <regex.h>
57 #include <signal.h>
58 #include <stdarg.h>
59 #include <stdbool.h>
60 #include <stdint.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <sysexits.h>
65 #include <unistd.h>
66
67 #include <libpmcstat.h>
68
69 #include "pmcstat.h"
70
71 /*
72 * A given invocation of pmcstat(8) can manage multiple PMCs of both
73 * the system-wide and per-process variety. Each of these could be in
74 * 'counting mode' or in 'sampling mode'.
75 *
76 * For 'counting mode' PMCs, pmcstat(8) will periodically issue a
77 * pmc_read() at the configured time interval and print out the value
78 * of the requested PMCs.
79 *
80 * For 'sampling mode' PMCs it can log to a file for offline analysis,
81 * or can analyse sampling data "on the fly", either by converting
82 * samples to printed textual form or by creating gprof(1) compatible
83 * profiles, one per program executed. When creating gprof(1)
84 * profiles it can optionally merge entries from multiple processes
85 * for a given executable into a single profile file.
86 *
87 * pmcstat(8) can also execute a command line and attach PMCs to the
88 * resulting child process. The protocol used is as follows:
89 *
90 * - parent creates a socketpair for two way communication and
91 * fork()s.
92 * - subsequently:
93 *
94 * /Parent/ /Child/
95 *
96 * - Wait for child's token.
97 * - Sends token.
98 * - Awaits signal to start.
99 * - Attaches PMCs to the child's pid
100 * and starts them. Sets up
101 * monitoring for the child.
102 * - Signals child to start.
103 * - Receives signal, attempts exec().
104 *
105 * After this point normal processing can happen.
106 */
107
108 /* Globals */
109
110 int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT;
111 int pmcstat_displaywidth = DEFAULT_DISPLAY_WIDTH;
112 static int pmcstat_sockpair[NSOCKPAIRFD];
113 static int pmcstat_kq;
114 static kvm_t *pmcstat_kvm;
115 static struct kinfo_proc *pmcstat_plist;
116 struct pmcstat_args args;
117 static bool libpmc_initialized = false;
118
119 static void
pmcstat_get_cpumask(const char * cpuspec,cpuset_t * cpumask)120 pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask)
121 {
122 int cpu;
123 const char *s;
124 char *end;
125
126 CPU_ZERO(cpumask);
127 s = cpuspec;
128
129 do {
130 cpu = strtol(s, &end, 0);
131 if (cpu < 0 || end == s)
132 errx(EX_USAGE,
133 "ERROR: Illegal CPU specification \"%s\".",
134 cpuspec);
135 CPU_SET(cpu, cpumask);
136 s = end + strspn(end, ", \t");
137 } while (*s);
138 assert(!CPU_EMPTY(cpumask));
139 }
140
141 void
pmcstat_cleanup(void)142 pmcstat_cleanup(void)
143 {
144 struct pmcstat_ev *ev;
145
146 /* release allocated PMCs. */
147 STAILQ_FOREACH(ev, &args.pa_events, ev_next)
148 if (ev->ev_pmcid != PMC_ID_INVALID) {
149 if (pmc_stop(ev->ev_pmcid) < 0)
150 err(EX_OSERR,
151 "ERROR: cannot stop pmc 0x%x \"%s\"",
152 ev->ev_pmcid, ev->ev_name);
153 if (pmc_release(ev->ev_pmcid) < 0)
154 err(EX_OSERR,
155 "ERROR: cannot release pmc 0x%x \"%s\"",
156 ev->ev_pmcid, ev->ev_name);
157 }
158
159 /* de-configure the log file if present. */
160 if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE))
161 (void) pmc_configure_logfile(-1);
162
163 if (args.pa_logparser) {
164 pmclog_close(args.pa_logparser);
165 args.pa_logparser = NULL;
166 }
167
168 pmcstat_log_shutdown_logging();
169 }
170
171 void
pmcstat_find_targets(const char * spec)172 pmcstat_find_targets(const char *spec)
173 {
174 int n, nproc, pid, rv;
175 struct pmcstat_target *pt;
176 char errbuf[_POSIX2_LINE_MAX], *end;
177 static struct kinfo_proc *kp;
178 regex_t reg;
179 regmatch_t regmatch;
180
181 /* First check if we've been given a process id. */
182 pid = strtol(spec, &end, 0);
183 if (end != spec && pid >= 0) {
184 if ((pt = malloc(sizeof(*pt))) == NULL)
185 goto outofmemory;
186 pt->pt_pid = pid;
187 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
188 return;
189 }
190
191 /* Otherwise treat arg as a regular expression naming processes. */
192 if (pmcstat_kvm == NULL) {
193 if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0,
194 errbuf)) == NULL)
195 err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"",
196 errbuf);
197 if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC,
198 0, &nproc)) == NULL)
199 err(EX_OSERR, "ERROR: Cannot get process list: %s",
200 kvm_geterr(pmcstat_kvm));
201 } else
202 nproc = 0;
203
204 if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) {
205 regerror(rv, ®, errbuf, sizeof(errbuf));
206 err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s",
207 spec, errbuf);
208 }
209
210 for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) {
211 if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) {
212 if ((pt = malloc(sizeof(*pt))) == NULL)
213 goto outofmemory;
214 pt->pt_pid = kp->ki_pid;
215 SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next);
216 } else if (rv != REG_NOMATCH) {
217 regerror(rv, ®, errbuf, sizeof(errbuf));
218 errx(EX_SOFTWARE, "ERROR: Regex evaluation failed: %s",
219 errbuf);
220 }
221 }
222
223 regfree(®);
224
225 return;
226
227 outofmemory:
228 errx(EX_SOFTWARE, "Out of memory.");
229 /*NOTREACHED*/
230 }
231
232 void
pmcstat_kill_process(void)233 pmcstat_kill_process(void)
234 {
235 struct pmcstat_target *pt;
236
237 assert(args.pa_flags & FLAG_HAS_COMMANDLINE);
238
239 /*
240 * If a command line was specified, it would be the very first
241 * in the list, before any other processes specified by -t.
242 */
243 pt = SLIST_FIRST(&args.pa_targets);
244 assert(pt != NULL);
245
246 if (kill(pt->pt_pid, SIGINT) != 0)
247 err(EX_OSERR, "ERROR: cannot signal child process");
248 }
249
250 void
pmcstat_start_pmcs(void)251 pmcstat_start_pmcs(void)
252 {
253 struct pmcstat_ev *ev;
254
255 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
256
257 assert(ev->ev_pmcid != PMC_ID_INVALID);
258
259 if (pmc_start(ev->ev_pmcid) < 0) {
260 warn("ERROR: Cannot start pmc 0x%x \"%s\"",
261 ev->ev_pmcid, ev->ev_name);
262 pmcstat_cleanup();
263 exit(EX_OSERR);
264 }
265 }
266 }
267
268 void
pmcstat_print_headers(void)269 pmcstat_print_headers(void)
270 {
271 struct pmcstat_ev *ev;
272 int c, w;
273
274 (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX);
275
276 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
277 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
278 continue;
279
280 c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
281
282 if (ev->ev_fieldskip != 0)
283 (void) fprintf(args.pa_printfile, "%*s",
284 ev->ev_fieldskip, "");
285 w = ev->ev_fieldwidth - ev->ev_fieldskip - 2;
286
287 if (c == 's')
288 (void) fprintf(args.pa_printfile, "s/%02d/%-*s ",
289 ev->ev_cpu, w-3, ev->ev_name);
290 else
291 (void) fprintf(args.pa_printfile, "p/%*s ", w,
292 ev->ev_name);
293 }
294
295 (void) fflush(args.pa_printfile);
296 }
297
298 void
pmcstat_print_counters(void)299 pmcstat_print_counters(void)
300 {
301 int extra_width;
302 struct pmcstat_ev *ev;
303 pmc_value_t value;
304
305 extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
306
307 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
308
309 /* skip sampling mode counters */
310 if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
311 continue;
312
313 if (pmc_read(ev->ev_pmcid, &value) < 0)
314 err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"",
315 ev->ev_name);
316
317 (void) fprintf(args.pa_printfile, "%*ju ",
318 ev->ev_fieldwidth + extra_width,
319 (uintmax_t) ev->ev_cumulative ? value :
320 (value - ev->ev_saved));
321
322 if (ev->ev_cumulative == 0)
323 ev->ev_saved = value;
324 extra_width = 0;
325 }
326
327 (void) fflush(args.pa_printfile);
328 }
329
330 /*
331 * Print output
332 */
333
334 void
pmcstat_print_pmcs(void)335 pmcstat_print_pmcs(void)
336 {
337 static int linecount = 0;
338
339 /* check if we need to print a header line */
340 if (++linecount > pmcstat_displayheight) {
341 (void) fprintf(args.pa_printfile, "\n");
342 linecount = 1;
343 }
344 if (linecount == 1)
345 pmcstat_print_headers();
346 (void) fprintf(args.pa_printfile, "\n");
347
348 pmcstat_print_counters();
349 }
350
351 void
pmcstat_show_usage(void)352 pmcstat_show_usage(void)
353 {
354 errx(EX_USAGE,
355 "[options] [commandline]\n"
356 "\t Measure process and/or system performance using hardware\n"
357 "\t performance monitoring counters.\n"
358 "\t Options include:\n"
359 "\t -C\t\t (toggle) show cumulative counts\n"
360 "\t -D path\t create profiles in directory \"path\"\n"
361 "\t -E\t\t (toggle) show counts at process exit\n"
362 "\t -F file\t write a system-wide callgraph (Kcachegrind format)"
363 " to \"file\"\n"
364 "\t -G file\t write a system-wide callgraph to \"file\"\n"
365 "\t -I\t\t don't resolve leaf function name, show address instead\n"
366 "\t -L\t\t list all counters available on this host\n"
367 "\t -M file\t print executable/gmon file map to \"file\"\n"
368 "\t -N\t\t (toggle) capture callchains\n"
369 "\t -O file\t send log output to \"file\"\n"
370 "\t -P spec\t allocate a process-private sampling PMC\n"
371 "\t -R file\t read events from \"file\"\n"
372 "\t -S spec\t allocate a system-wide sampling PMC\n"
373 "\t -T\t\t start in top mode\n"
374 "\t -U \t\t merged user kernel stack capture\n"
375 "\t -W\t\t (toggle) show counts per context switch\n"
376 "\t -a file\t print sampled PCs and callgraph to \"file\"\n"
377 "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n"
378 "\t -d\t\t (toggle) track descendants\n"
379 "\t -e\t\t use wide history counter for gprof(1) output\n"
380 "\t -f spec\t pass \"spec\" to as plugin option\n"
381 "\t -g\t\t produce gprof(1) compatible profiles\n"
382 "\t -i lwp\t\t filter on thread id \"lwp\" in post-processing\n"
383 "\t -l secs\t set duration time\n"
384 "\t -m file\t print sampled PCs to \"file\"\n"
385 "\t -n rate\t set sampling rate\n"
386 "\t -o file\t send print output to \"file\"\n"
387 "\t -p spec\t allocate a process-private counting PMC\n"
388 "\t -q\t\t suppress verbosity\n"
389 "\t -r fsroot\t specify FS root directory\n"
390 "\t -s spec\t allocate a system-wide counting PMC\n"
391 "\t -t process-spec attach to running processes matching "
392 "\"process-spec\"\n"
393 "\t -u spec \t provide short description of counters matching spec\n"
394 "\t -v\t\t increase verbosity\n"
395 "\t -w secs\t set printing time interval\n"
396 "\t -z depth\t limit callchain display depth"
397 );
398 }
399
400 /*
401 * At exit handler for top mode
402 */
403
404 void
pmcstat_topexit(void)405 pmcstat_topexit(void)
406 {
407 if (!args.pa_toptty)
408 return;
409
410 /*
411 * Shutdown ncurses.
412 */
413 clrtoeol();
414 refresh();
415 endwin();
416 }
417
418 static inline void
libpmc_initialize(int * npmc)419 libpmc_initialize(int *npmc)
420 {
421
422 if (libpmc_initialized)
423 return;
424 if (pmc_init() < 0)
425 err(EX_UNAVAILABLE, "ERROR: Initialization of the pmc(3)"
426 " library failed");
427
428 /* assume all CPUs are identical */
429 if ((*npmc = pmc_npmc(0)) < 0)
430 err(EX_OSERR, "ERROR: Cannot determine the number of PMCs on "
431 "CPU %d", 0);
432 libpmc_initialized = true;
433 }
434 /*
435 * Main
436 */
437
438 int
main(int argc,char ** argv)439 main(int argc, char **argv)
440 {
441 cpuset_t cpumask, dommask, rootmask;
442 double interval;
443 double duration;
444 int option, npmc;
445 int c, check_driver_stats;
446 int do_callchain, do_descendants, do_logproccsw, do_logprocexit;
447 int do_print, do_read, do_listcounters, do_descr, domains;
448 int do_userspace, i;
449 size_t len;
450 int graphdepth;
451 int pipefd[2], rfd;
452 int use_cumulative_counts;
453 short cf, cb;
454 uint64_t current_sampling_count;
455 char *end, *event;
456 const char *errmsg, *graphfilename;
457 enum pmcstat_state runstate;
458 struct pmc_driverstats ds_start, ds_end;
459 struct pmcstat_ev *ev;
460 struct sigaction sa;
461 struct kevent kev;
462 struct winsize ws;
463 struct stat sb;
464 uint32_t caps;
465
466 check_driver_stats = 0;
467 current_sampling_count = 0;
468 do_callchain = 1;
469 do_descr = 0;
470 do_descendants = 0;
471 do_userspace = 0;
472 do_logproccsw = 0;
473 do_logprocexit = 0;
474 do_listcounters = 0;
475 domains = 0;
476 use_cumulative_counts = 0;
477 graphfilename = "-";
478 args.pa_required = 0;
479 args.pa_flags = 0;
480 args.pa_verbosity = 1;
481 args.pa_logfd = -1;
482 args.pa_fsroot = "";
483 args.pa_samplesdir = ".";
484 args.pa_printfile = stderr;
485 args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH;
486 args.pa_graphfile = NULL;
487 args.pa_interval = DEFAULT_WAIT_INTERVAL;
488 args.pa_mapfilename = NULL;
489 args.pa_inputpath = NULL;
490 args.pa_outputpath = NULL;
491 args.pa_pplugin = PMCSTAT_PL_NONE;
492 args.pa_plugin = PMCSTAT_PL_NONE;
493 args.pa_ctdumpinstr = 1;
494 args.pa_topmode = PMCSTAT_TOP_DELTA;
495 args.pa_toptty = 0;
496 args.pa_topcolor = 0;
497 args.pa_mergepmc = 0;
498 args.pa_duration = 0.0;
499 STAILQ_INIT(&args.pa_events);
500 SLIST_INIT(&args.pa_targets);
501 bzero(&ds_start, sizeof(ds_start));
502 bzero(&ds_end, sizeof(ds_end));
503 ev = NULL;
504 event = NULL;
505 caps = 0;
506 CPU_ZERO(&cpumask);
507
508 len = sizeof(domains);
509 if (sysctlbyname("vm.ndomains", &domains, &len, NULL, 0) == -1)
510 err(EX_OSERR, "ERROR: Cannot get number of domains");
511
512 /*
513 * The initial CPU mask specifies the root mask of this process
514 * which is usually all CPUs in the system.
515 */
516 if (cpuset_getaffinity(CPU_LEVEL_ROOT, CPU_WHICH_PID, -1,
517 sizeof(rootmask), &rootmask) == -1)
518 err(EX_OSERR, "ERROR: Cannot determine the root set of CPUs");
519 CPU_COPY(&rootmask, &cpumask);
520
521 while ((option = getopt(argc, argv,
522 "ACD:EF:G:ILM:NO:P:R:S:TUWZa:c:def:gi:l:m:n:o:p:qr:s:t:u:vw:z:")) != -1)
523 switch (option) {
524 case 'A':
525 args.pa_flags |= FLAG_SKIP_TOP_FN_RES;
526 break;
527
528 case 'a': /* Annotate + callgraph */
529 args.pa_flags |= FLAG_DO_ANNOTATE;
530 args.pa_plugin = PMCSTAT_PL_ANNOTATE_CG;
531 graphfilename = optarg;
532 break;
533
534 case 'C': /* cumulative values */
535 use_cumulative_counts = !use_cumulative_counts;
536 args.pa_required |= FLAG_HAS_COUNTING_PMCS;
537 break;
538
539 case 'c': /* CPU */
540 if (optarg[0] == '*' && optarg[1] == '\0')
541 CPU_COPY(&rootmask, &cpumask);
542 else
543 pmcstat_get_cpumask(optarg, &cpumask);
544
545 args.pa_flags |= FLAGS_HAS_CPUMASK;
546 args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
547 break;
548
549 case 'D':
550 if (stat(optarg, &sb) < 0)
551 err(EX_OSERR, "ERROR: Cannot stat \"%s\"",
552 optarg);
553 if (!S_ISDIR(sb.st_mode))
554 errx(EX_USAGE,
555 "ERROR: \"%s\" is not a directory.",
556 optarg);
557 args.pa_samplesdir = optarg;
558 args.pa_flags |= FLAG_HAS_SAMPLESDIR;
559 args.pa_required |= FLAG_DO_GPROF;
560 break;
561
562 case 'd': /* toggle descendents */
563 do_descendants = !do_descendants;
564 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
565 break;
566
567 case 'E': /* log process exit */
568 do_logprocexit = !do_logprocexit;
569 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
570 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
571 break;
572
573 case 'e': /* wide gprof metrics */
574 args.pa_flags |= FLAG_DO_WIDE_GPROF_HC;
575 break;
576
577 case 'F': /* produce a system-wide calltree */
578 args.pa_flags |= FLAG_DO_CALLGRAPHS;
579 args.pa_plugin = PMCSTAT_PL_CALLTREE;
580 graphfilename = optarg;
581 break;
582
583 case 'f': /* plugins options */
584 if (args.pa_plugin == PMCSTAT_PL_NONE)
585 err(EX_USAGE, "ERROR: Need -g/-G/-m/-T.");
586 pmcstat_pluginconfigure_log(optarg);
587 break;
588
589 case 'G': /* produce a system-wide callgraph */
590 args.pa_flags |= FLAG_DO_CALLGRAPHS;
591 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
592 graphfilename = optarg;
593 break;
594
595 case 'g': /* produce gprof compatible profiles */
596 args.pa_flags |= FLAG_DO_GPROF;
597 args.pa_pplugin = PMCSTAT_PL_CALLGRAPH;
598 args.pa_plugin = PMCSTAT_PL_GPROF;
599 break;
600
601 case 'i':
602 args.pa_flags |= FLAG_FILTER_THREAD_ID;
603 args.pa_tid = strtol(optarg, &end, 0);
604 break;
605
606 case 'I':
607 args.pa_flags |= FLAG_SHOW_OFFSET;
608 break;
609
610 case 'L':
611 do_listcounters = 1;
612 break;
613
614 case 'l': /* time duration in seconds */
615 duration = strtod(optarg, &end);
616 if (*end != '\0' || duration <= 0)
617 errx(EX_USAGE, "ERROR: Illegal duration time "
618 "value \"%s\".", optarg);
619 args.pa_flags |= FLAG_HAS_DURATION;
620 args.pa_duration = duration;
621 break;
622
623 case 'm':
624 args.pa_flags |= FLAG_DO_ANNOTATE;
625 args.pa_plugin = PMCSTAT_PL_ANNOTATE;
626 graphfilename = optarg;
627 break;
628
629 case 'M': /* mapfile */
630 args.pa_mapfilename = optarg;
631 break;
632
633 case 'N':
634 do_callchain = !do_callchain;
635 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
636 break;
637
638 case 'p': /* process virtual counting PMC */
639 case 's': /* system-wide counting PMC */
640 case 'P': /* process virtual sampling PMC */
641 case 'S': /* system-wide sampling PMC */
642 caps = 0;
643 if ((ev = malloc(sizeof(*ev))) == NULL)
644 errx(EX_SOFTWARE, "ERROR: Out of memory.");
645
646 switch (option) {
647 case 'p': ev->ev_mode = PMC_MODE_TC; break;
648 case 's': ev->ev_mode = PMC_MODE_SC; break;
649 case 'P': ev->ev_mode = PMC_MODE_TS; break;
650 case 'S': ev->ev_mode = PMC_MODE_SS; break;
651 }
652
653 if (option == 'P' || option == 'p') {
654 args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
655 args.pa_required |= (FLAG_HAS_COMMANDLINE |
656 FLAG_HAS_TARGET);
657 }
658
659 if (option == 'P' || option == 'S') {
660 args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
661 args.pa_required |= (FLAG_HAS_PIPE |
662 FLAG_HAS_OUTPUT_LOGFILE);
663 }
664
665 if (option == 'p' || option == 's')
666 args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
667
668 if (option == 's' || option == 'S')
669 args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
670
671 ev->ev_spec = strdup(optarg);
672 if (ev->ev_spec == NULL)
673 errx(EX_SOFTWARE, "ERROR: Out of memory.");
674
675 if (option == 'S' || option == 'P')
676 ev->ev_count = current_sampling_count ? current_sampling_count : pmc_pmu_sample_rate_get(ev->ev_spec);
677 else
678 ev->ev_count = 0;
679
680 if (option == 'S' || option == 's')
681 ev->ev_cpu = CPU_FFS(&cpumask) - 1;
682 else
683 ev->ev_cpu = PMC_CPU_ANY;
684
685 ev->ev_flags = 0;
686 if (do_callchain) {
687 ev->ev_flags |= PMC_F_CALLCHAIN;
688 if (do_userspace)
689 ev->ev_flags |= PMC_F_USERCALLCHAIN;
690 }
691 if (do_descendants)
692 ev->ev_flags |= PMC_F_DESCENDANTS;
693 if (do_logprocexit)
694 ev->ev_flags |= PMC_F_LOG_PROCEXIT;
695 if (do_logproccsw)
696 ev->ev_flags |= PMC_F_LOG_PROCCSW;
697
698 ev->ev_cumulative = use_cumulative_counts;
699
700 ev->ev_saved = 0LL;
701 ev->ev_pmcid = PMC_ID_INVALID;
702
703 /* extract event name */
704 c = strcspn(optarg, ", \t");
705 ev->ev_name = malloc(c + 1);
706 if (ev->ev_name == NULL)
707 errx(EX_SOFTWARE, "ERROR: Out of memory.");
708 (void) strncpy(ev->ev_name, optarg, c);
709 *(ev->ev_name + c) = '\0';
710
711 libpmc_initialize(&npmc);
712
713 if (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) {
714 /*
715 * We need to check the capabilities of the
716 * desired event to determine if it should be
717 * allocated on every CPU, or only a subset of
718 * them. This requires allocating a PMC now.
719 */
720 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
721 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid,
722 ev->ev_count) < 0)
723 err(EX_OSERR, "ERROR: Cannot allocate "
724 "system-mode pmc with specification"
725 " \"%s\"", ev->ev_spec);
726 if (pmc_capabilities(ev->ev_pmcid, &caps)) {
727 pmc_release(ev->ev_pmcid);
728 err(EX_OSERR, "ERROR: Cannot get pmc "
729 "capabilities");
730 }
731
732 /*
733 * Release the PMC now that we have caps; we
734 * will reallocate shortly.
735 */
736 pmc_release(ev->ev_pmcid);
737 ev->ev_pmcid = PMC_ID_INVALID;
738 }
739
740 STAILQ_INSERT_TAIL(&args.pa_events, ev, ev_next);
741
742 if ((caps & PMC_CAP_SYSWIDE) == PMC_CAP_SYSWIDE) {
743 CPU_ZERO(&cpumask);
744 CPU_SET(0, &cpumask);
745 args.pa_flags |= FLAGS_HAS_CPUMASK;
746 }
747 if ((caps & PMC_CAP_DOMWIDE) == PMC_CAP_DOMWIDE) {
748 CPU_ZERO(&cpumask);
749 /*
750 * Get number of domains and allocate one
751 * counter in each.
752 * First already allocated.
753 */
754 for (i = 1; i < domains; i++) {
755 CPU_ZERO(&dommask);
756 cpuset_getaffinity(CPU_LEVEL_WHICH,
757 CPU_WHICH_DOMAIN, i, sizeof(dommask),
758 &dommask);
759 CPU_SET(CPU_FFS(&dommask) - 1, &cpumask);
760 }
761 args.pa_flags |= FLAGS_HAS_CPUMASK;
762 }
763 if (option == 's' || option == 'S') {
764 CPU_CLR(ev->ev_cpu, &cpumask);
765 pmcstat_clone_event_descriptor(ev, &cpumask, &args);
766 CPU_SET(ev->ev_cpu, &cpumask);
767 }
768
769 break;
770
771 case 'n': /* sampling count */
772 current_sampling_count = strtol(optarg, &end, 0);
773 if (*end != '\0' || current_sampling_count <= 0)
774 errx(EX_USAGE,
775 "ERROR: Illegal count value \"%s\".",
776 optarg);
777 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
778 break;
779
780 case 'o': /* outputfile */
781 if (args.pa_printfile != NULL &&
782 args.pa_printfile != stdout &&
783 args.pa_printfile != stderr)
784 (void) fclose(args.pa_printfile);
785 if ((args.pa_printfile = fopen(optarg, "w")) == NULL)
786 errx(EX_OSERR,
787 "ERROR: cannot open \"%s\" for writing.",
788 optarg);
789 args.pa_flags |= FLAG_DO_PRINT;
790 break;
791
792 case 'O': /* sampling output */
793 if (args.pa_outputpath)
794 errx(EX_USAGE,
795 "ERROR: option -O may only be specified once.");
796 args.pa_outputpath = optarg;
797 args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE;
798 break;
799
800 case 'q': /* quiet mode */
801 args.pa_verbosity = 0;
802 break;
803
804 case 'r': /* root FS path */
805 args.pa_fsroot = optarg;
806 break;
807
808 case 'R': /* read an existing log file */
809 if (args.pa_inputpath != NULL)
810 errx(EX_USAGE,
811 "ERROR: option -R may only be specified once.");
812 args.pa_inputpath = optarg;
813 if (args.pa_printfile == stderr)
814 args.pa_printfile = stdout;
815 args.pa_flags |= FLAG_READ_LOGFILE;
816 break;
817
818 case 't': /* target pid or process name */
819 pmcstat_find_targets(optarg);
820
821 args.pa_flags |= FLAG_HAS_TARGET;
822 args.pa_required |= FLAG_HAS_PROCESS_PMCS;
823 break;
824
825 case 'T': /* top mode */
826 args.pa_flags |= FLAG_DO_TOP;
827 args.pa_plugin = PMCSTAT_PL_CALLGRAPH;
828 args.pa_ctdumpinstr = 0;
829 args.pa_mergepmc = 1;
830 if (args.pa_printfile == stderr)
831 args.pa_printfile = stdout;
832 break;
833
834 case 'u':
835 do_descr = 1;
836 event = optarg;
837 break;
838 case 'U': /* toggle user-space callchain capture */
839 do_userspace = !do_userspace;
840 args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
841 break;
842 case 'v': /* verbose */
843 args.pa_verbosity++;
844 break;
845
846 case 'w': /* wait interval */
847 interval = strtod(optarg, &end);
848 if (*end != '\0' || interval <= 0)
849 errx(EX_USAGE,
850 "ERROR: Illegal wait interval value \"%s\".",
851 optarg);
852 args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
853 args.pa_interval = interval;
854 break;
855
856 case 'W': /* toggle LOG_CSW */
857 do_logproccsw = !do_logproccsw;
858 args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
859 FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE);
860 break;
861
862 case 'z':
863 graphdepth = strtod(optarg, &end);
864 if (*end != '\0' || graphdepth <= 0)
865 errx(EX_USAGE,
866 "ERROR: Illegal callchain depth \"%s\".",
867 optarg);
868 args.pa_graphdepth = graphdepth;
869 args.pa_required |= FLAG_DO_CALLGRAPHS;
870 break;
871
872 case '?':
873 default:
874 pmcstat_show_usage();
875 break;
876
877 }
878 if ((do_listcounters | do_descr) &&
879 pmc_pmu_enabled() == 0)
880 errx(EX_USAGE, "pmu features not supported on host or hwpmc not loaded");
881 if (do_listcounters) {
882 pmc_pmu_print_counters(NULL);
883 } else if (do_descr) {
884 pmc_pmu_print_counter_desc(event);
885 }
886 if (do_listcounters | do_descr)
887 exit(0);
888
889 args.pa_argc = (argc -= optind);
890 args.pa_argv = (argv += optind);
891
892 /* If we read from logfile and no specified CPU mask use
893 * the maximum CPU count.
894 */
895 if ((args.pa_flags & FLAG_READ_LOGFILE) &&
896 (args.pa_flags & FLAGS_HAS_CPUMASK) == 0)
897 CPU_FILL(&cpumask);
898
899 args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */
900
901 if (argc) /* command line present */
902 args.pa_flags |= FLAG_HAS_COMMANDLINE;
903
904 if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS |
905 FLAG_DO_ANNOTATE | FLAG_DO_TOP))
906 args.pa_flags |= FLAG_DO_ANALYSIS;
907
908 /*
909 * Check invocation syntax.
910 */
911
912 /* disallow -O and -R together */
913 if (args.pa_outputpath && args.pa_inputpath)
914 errx(EX_USAGE,
915 "ERROR: options -O and -R are mutually exclusive.");
916
917 /* disallow -T and -l together */
918 if ((args.pa_flags & FLAG_HAS_DURATION) &&
919 (args.pa_flags & FLAG_DO_TOP))
920 errx(EX_USAGE, "ERROR: options -T and -l are mutually "
921 "exclusive.");
922
923 /* -a and -m require -R */
924 if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL)
925 errx(EX_USAGE, "ERROR: option %s requires an input file",
926 args.pa_plugin == PMCSTAT_PL_ANNOTATE ? "-m" : "-a");
927
928 /* -m option is not allowed combined with -g or -G. */
929 if (args.pa_flags & FLAG_DO_ANNOTATE &&
930 args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS))
931 errx(EX_USAGE,
932 "ERROR: option -m and -g | -G are mutually exclusive");
933
934 if (args.pa_flags & FLAG_READ_LOGFILE) {
935 errmsg = NULL;
936 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
937 errmsg = "a command line specification";
938 else if (args.pa_flags & FLAG_HAS_TARGET)
939 errmsg = "option -t";
940 else if (!STAILQ_EMPTY(&args.pa_events))
941 errmsg = "a PMC event specification";
942 if (errmsg)
943 errx(EX_USAGE,
944 "ERROR: option -R may not be used with %s.",
945 errmsg);
946 } else if (STAILQ_EMPTY(&args.pa_events))
947 /* All other uses require a PMC spec. */
948 pmcstat_show_usage();
949
950 /* check for -t pid without a process PMC spec */
951 if ((args.pa_flags & FLAG_HAS_TARGET) &&
952 (args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
953 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
954 errx(EX_USAGE,
955 "ERROR: option -t requires a process mode PMC to be specified."
956 );
957
958 /* check for process-mode options without a command or -t pid */
959 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
960 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
961 errx(EX_USAGE,
962 "ERROR: options -d, -E, -p, -P, and -W require a command line or target process."
963 );
964
965 /* check for -p | -P without a target process of some sort */
966 if ((args.pa_required & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) &&
967 (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0)
968 errx(EX_USAGE,
969 "ERROR: options -P and -p require a target process or a command line."
970 );
971
972 /* check for process-mode options without a process-mode PMC */
973 if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
974 (args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
975 errx(EX_USAGE,
976 "ERROR: options -d, -E, -t, and -W require a process mode PMC to be specified."
977 );
978
979 /* check for -c cpu with no system mode PMCs or logfile. */
980 if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
981 (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 &&
982 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
983 errx(EX_USAGE,
984 "ERROR: option -c requires at least one system mode PMC to be specified."
985 );
986
987 /* check for counting mode options without a counting PMC */
988 if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
989 (args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
990 errx(EX_USAGE,
991 "ERROR: options -C, -W and -o require at least one counting mode PMC to be specified."
992 );
993
994 /* check for sampling mode options without a sampling PMC spec */
995 if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
996 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
997 errx(EX_USAGE,
998 "ERROR: options -N, -n and -O require at least one sampling mode PMC to be specified."
999 );
1000
1001 /* check if -g/-G/-m/-T are being used correctly */
1002 if ((args.pa_flags & FLAG_DO_ANALYSIS) &&
1003 !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE)))
1004 errx(EX_USAGE,
1005 "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified."
1006 );
1007
1008 /* check if -e was specified without -g */
1009 if ((args.pa_flags & FLAG_DO_WIDE_GPROF_HC) &&
1010 !(args.pa_flags & FLAG_DO_GPROF))
1011 errx(EX_USAGE,
1012 "ERROR: option -e requires gprof mode to be specified."
1013 );
1014
1015 /* check if -O was spuriously specified */
1016 if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) &&
1017 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0)
1018 errx(EX_USAGE,
1019 "ERROR: option -O is used only with options -E, -P, -S and -W."
1020 );
1021
1022 /* -D only applies to gprof output mode (-g) */
1023 if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) &&
1024 (args.pa_flags & FLAG_DO_GPROF) == 0)
1025 errx(EX_USAGE, "ERROR: option -D is only used with -g.");
1026
1027 /* -M mapfile requires -g or -R */
1028 if (args.pa_mapfilename != NULL &&
1029 (args.pa_flags & FLAG_DO_GPROF) == 0 &&
1030 (args.pa_flags & FLAG_READ_LOGFILE) == 0)
1031 errx(EX_USAGE, "ERROR: option -M is only used with -g/-R.");
1032
1033 /*
1034 * Disallow textual output of sampling PMCs if counting PMCs
1035 * have also been asked for, mostly because the combined output
1036 * is difficult to make sense of.
1037 */
1038 if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1039 (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1040 ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0))
1041 errx(EX_USAGE,
1042 "ERROR: option -O is required if counting and sampling PMCs are specified together."
1043 );
1044
1045 /*
1046 * If we have a callgraph be created, select the outputfile.
1047 */
1048 if (args.pa_flags & FLAG_DO_CALLGRAPHS) {
1049 if (strcmp(graphfilename, "-") == 0)
1050 args.pa_graphfile = args.pa_printfile;
1051 else {
1052 args.pa_graphfile = fopen(graphfilename, "w");
1053 if (args.pa_graphfile == NULL)
1054 err(EX_OSERR,
1055 "ERROR: cannot open \"%s\" for writing",
1056 graphfilename);
1057 }
1058 }
1059 if (args.pa_flags & FLAG_DO_ANNOTATE) {
1060 args.pa_graphfile = fopen(graphfilename, "w");
1061 if (args.pa_graphfile == NULL)
1062 err(EX_OSERR, "ERROR: cannot open \"%s\" for writing",
1063 graphfilename);
1064 }
1065
1066 /* if we've been asked to process a log file, skip init */
1067 if ((args.pa_flags & FLAG_READ_LOGFILE) == 0)
1068 libpmc_initialize(&npmc);
1069
1070 /* Allocate a kqueue */
1071 if ((pmcstat_kq = kqueue()) < 0)
1072 err(EX_OSERR, "ERROR: Cannot allocate kqueue");
1073
1074 /* Setup the logfile as the source. */
1075 if (args.pa_flags & FLAG_READ_LOGFILE) {
1076 /*
1077 * Print the log in textual form if we haven't been
1078 * asked to generate profiling information.
1079 */
1080 if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0)
1081 args.pa_flags |= FLAG_DO_PRINT;
1082
1083 pmcstat_log_initialize_logging();
1084 rfd = pmcstat_open_log(args.pa_inputpath,
1085 PMCSTAT_OPEN_FOR_READ);
1086 if ((args.pa_logparser = pmclog_open(rfd)) == NULL)
1087 err(EX_OSERR, "ERROR: Cannot create parser");
1088 if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0)
1089 err(EX_OSERR, "ERROR: fcntl(2) failed");
1090 EV_SET(&kev, rfd, EVFILT_READ, EV_ADD,
1091 0, 0, NULL);
1092 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1093 err(EX_OSERR, "ERROR: Cannot register kevent");
1094 }
1095 /*
1096 * Configure the specified log file or setup a default log
1097 * consumer via a pipe.
1098 */
1099 if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) {
1100 if (args.pa_outputpath)
1101 args.pa_logfd = pmcstat_open_log(args.pa_outputpath,
1102 PMCSTAT_OPEN_FOR_WRITE);
1103 else {
1104 /*
1105 * process the log on the fly by reading it in
1106 * through a pipe.
1107 */
1108 if (pipe(pipefd) < 0)
1109 err(EX_OSERR, "ERROR: pipe(2) failed");
1110
1111 if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0)
1112 err(EX_OSERR, "ERROR: fcntl(2) failed");
1113
1114 EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
1115 0, 0, NULL);
1116
1117 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1118 err(EX_OSERR, "ERROR: Cannot register kevent");
1119
1120 args.pa_logfd = pipefd[WRITEPIPEFD];
1121
1122 args.pa_flags |= FLAG_HAS_PIPE;
1123 if ((args.pa_flags & FLAG_DO_TOP) == 0)
1124 args.pa_flags |= FLAG_DO_PRINT;
1125 args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
1126 }
1127
1128 if (pmc_configure_logfile(args.pa_logfd) < 0)
1129 err(EX_OSERR, "ERROR: Cannot configure log file");
1130 }
1131
1132 /* remember to check for driver errors if we are sampling or logging */
1133 check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) ||
1134 (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE);
1135
1136 /*
1137 if (args.pa_flags & FLAG_READ_LOGFILE) {
1138 * Allocate PMCs.
1139 */
1140
1141 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1142 if (pmc_allocate(ev->ev_spec, ev->ev_mode,
1143 ev->ev_flags, ev->ev_cpu, &ev->ev_pmcid,
1144 ev->ev_count) < 0)
1145 err(EX_OSERR,
1146 "ERROR: Cannot allocate %s-mode pmc with specification \"%s\"",
1147 PMC_IS_SYSTEM_MODE(ev->ev_mode) ?
1148 "system" : "process", ev->ev_spec);
1149
1150 if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
1151 pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
1152 err(EX_OSERR,
1153 "ERROR: Cannot set sampling count for PMC \"%s\"",
1154 ev->ev_name);
1155 }
1156
1157 /* compute printout widths */
1158 STAILQ_FOREACH(ev, &args.pa_events, ev_next) {
1159 int counter_width;
1160 int display_width;
1161 int header_width;
1162
1163 (void) pmc_width(ev->ev_pmcid, &counter_width);
1164 header_width = strlen(ev->ev_name) + 2; /* prefix '%c/' */
1165 display_width = (int) floor(counter_width / 3.32193) + 1;
1166
1167 if (PMC_IS_SYSTEM_MODE(ev->ev_mode))
1168 header_width += 3; /* 2 digit CPU number + '/' */
1169
1170 if (header_width > display_width) {
1171 ev->ev_fieldskip = 0;
1172 ev->ev_fieldwidth = header_width;
1173 } else {
1174 ev->ev_fieldskip = display_width -
1175 header_width;
1176 ev->ev_fieldwidth = display_width;
1177 }
1178 }
1179
1180 /*
1181 * If our output is being set to a terminal, register a handler
1182 * for window size changes.
1183 */
1184
1185 if (isatty(fileno(args.pa_printfile))) {
1186
1187 if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0)
1188 err(EX_OSERR, "ERROR: Cannot determine window size");
1189
1190 pmcstat_displayheight = ws.ws_row - 1;
1191 pmcstat_displaywidth = ws.ws_col - 1;
1192
1193 EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1194
1195 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1196 err(EX_OSERR,
1197 "ERROR: Cannot register kevent for SIGWINCH");
1198
1199 args.pa_toptty = 1;
1200 }
1201
1202 /*
1203 * Listen to key input in top mode.
1204 */
1205 if (args.pa_flags & FLAG_DO_TOP) {
1206 EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL);
1207 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1208 err(EX_OSERR, "ERROR: Cannot register kevent");
1209 }
1210
1211 EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1212 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1213 err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
1214
1215 EV_SET(&kev, SIGIO, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1216 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1217 err(EX_OSERR, "ERROR: Cannot register kevent for SIGIO");
1218
1219 /*
1220 * An exec() failure of a forked child is signalled by the
1221 * child sending the parent a SIGCHLD. We don't register an
1222 * actual signal handler for SIGCHLD, but instead use our
1223 * kqueue to pick up the signal.
1224 */
1225 EV_SET(&kev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
1226 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1227 err(EX_OSERR, "ERROR: Cannot register kevent for SIGCHLD");
1228
1229 /*
1230 * Setup a timer if we have counting mode PMCs needing to be printed or
1231 * top mode plugin is active.
1232 */
1233 if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) &&
1234 (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) ||
1235 (args.pa_flags & FLAG_DO_TOP)) {
1236 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1237 args.pa_interval * 1000, NULL);
1238
1239 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1240 err(EX_OSERR,
1241 "ERROR: Cannot register kevent for timer");
1242 }
1243
1244 /*
1245 * Setup a duration timer if we have sampling mode PMCs and
1246 * a duration time is set
1247 */
1248 if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) &&
1249 (args.pa_flags & FLAG_HAS_DURATION)) {
1250 EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
1251 args.pa_duration * 1000, NULL);
1252
1253 if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
1254 err(EX_OSERR, "ERROR: Cannot register kevent for "
1255 "time duration");
1256 }
1257
1258 /* attach PMCs to the target process, starting it if specified */
1259 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1260 pmcstat_create_process(pmcstat_sockpair, &args, pmcstat_kq);
1261
1262 if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0)
1263 err(EX_OSERR, "ERROR: Cannot retrieve driver statistics");
1264
1265 /* Attach process pmcs to the target process. */
1266 if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) {
1267 if (SLIST_EMPTY(&args.pa_targets))
1268 errx(EX_DATAERR,
1269 "ERROR: No matching target processes.");
1270 if (args.pa_flags & FLAG_HAS_PROCESS_PMCS)
1271 pmcstat_attach_pmcs(&args);
1272
1273 if (pmcstat_kvm) {
1274 kvm_close(pmcstat_kvm);
1275 pmcstat_kvm = NULL;
1276 }
1277 }
1278
1279 /* start the pmcs */
1280 pmcstat_start_pmcs();
1281
1282 /* start the (commandline) process if needed */
1283 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1284 pmcstat_start_process(pmcstat_sockpair);
1285
1286 /* initialize logging */
1287 pmcstat_log_initialize_logging();
1288
1289 /* Handle SIGINT using the kqueue loop */
1290 sa.sa_handler = SIG_IGN;
1291 sa.sa_flags = 0;
1292 (void) sigemptyset(&sa.sa_mask);
1293
1294 if (sigaction(SIGINT, &sa, NULL) < 0)
1295 err(EX_OSERR, "ERROR: Cannot install signal handler");
1296
1297 /*
1298 * Setup the top mode display.
1299 */
1300 if (args.pa_flags & FLAG_DO_TOP) {
1301 args.pa_flags &= ~FLAG_DO_PRINT;
1302
1303 if (args.pa_toptty) {
1304 /*
1305 * Init ncurses.
1306 */
1307 initscr();
1308 if(has_colors() == TRUE) {
1309 args.pa_topcolor = 1;
1310 start_color();
1311 use_default_colors();
1312 pair_content(0, &cf, &cb);
1313 init_pair(1, COLOR_RED, cb);
1314 init_pair(2, COLOR_YELLOW, cb);
1315 init_pair(3, COLOR_GREEN, cb);
1316 }
1317 cbreak();
1318 noecho();
1319 nonl();
1320 nodelay(stdscr, 1);
1321 intrflush(stdscr, FALSE);
1322 keypad(stdscr, TRUE);
1323 clear();
1324 /* Get terminal width / height with ncurses. */
1325 getmaxyx(stdscr,
1326 pmcstat_displayheight, pmcstat_displaywidth);
1327 pmcstat_displayheight--; pmcstat_displaywidth--;
1328 atexit(pmcstat_topexit);
1329 }
1330 }
1331
1332 /*
1333 * loop till either the target process (if any) exits, or we
1334 * are killed by a SIGINT or we reached the time duration.
1335 */
1336 runstate = PMCSTAT_RUNNING;
1337 do_print = do_read = 0;
1338 do {
1339 if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
1340 if (errno != EINTR)
1341 err(EX_OSERR, "ERROR: kevent failed");
1342 else
1343 continue;
1344 }
1345
1346 if (kev.flags & EV_ERROR)
1347 errc(EX_OSERR, kev.data, "ERROR: kevent failed");
1348
1349 switch (kev.filter) {
1350 case EVFILT_PROC: /* target has exited */
1351 runstate = pmcstat_close_log(&args);
1352 do_print = 1;
1353 break;
1354
1355 case EVFILT_READ: /* log file data is present */
1356 if (kev.ident == (unsigned)fileno(stdin) &&
1357 (args.pa_flags & FLAG_DO_TOP)) {
1358 if (pmcstat_keypress_log())
1359 runstate = pmcstat_close_log(&args);
1360 } else {
1361 do_read = 0;
1362 runstate = pmcstat_process_log();
1363 }
1364 break;
1365
1366 case EVFILT_SIGNAL:
1367 if (kev.ident == SIGCHLD) {
1368 /*
1369 * The child process sends us a
1370 * SIGCHLD if its exec() failed. We
1371 * wait for it to exit and then exit
1372 * ourselves.
1373 */
1374 (void) wait(&c);
1375 runstate = PMCSTAT_FINISHED;
1376 } else if (kev.ident == SIGIO) {
1377 /*
1378 * We get a SIGIO if a PMC loses all
1379 * of its targets, or if logfile
1380 * writes encounter an error.
1381 */
1382 runstate = pmcstat_close_log(&args);
1383 do_print = 1; /* print PMCs at exit */
1384 } else if (kev.ident == SIGINT) {
1385 /* Kill the child process if we started it */
1386 if (args.pa_flags & FLAG_HAS_COMMANDLINE)
1387 pmcstat_kill_process();
1388 runstate = pmcstat_close_log(&args);
1389 } else if (kev.ident == SIGWINCH) {
1390 if (ioctl(fileno(args.pa_printfile),
1391 TIOCGWINSZ, &ws) < 0)
1392 err(EX_OSERR,
1393 "ERROR: Cannot determine window size");
1394 pmcstat_displayheight = ws.ws_row - 1;
1395 pmcstat_displaywidth = ws.ws_col - 1;
1396 } else
1397 assert(0);
1398
1399 break;
1400
1401 case EVFILT_TIMER:
1402 /* time duration reached, exit */
1403 if (args.pa_flags & FLAG_HAS_DURATION) {
1404 runstate = PMCSTAT_FINISHED;
1405 break;
1406 }
1407 /* print out counting PMCs */
1408 if ((args.pa_flags & FLAG_DO_TOP) &&
1409 (args.pa_flags & FLAG_HAS_PIPE) &&
1410 pmc_flush_logfile() == 0)
1411 do_read = 1;
1412 do_print = 1;
1413 break;
1414
1415 }
1416
1417 if (do_print && !do_read) {
1418 if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) {
1419 pmcstat_print_pmcs();
1420 if (runstate == PMCSTAT_FINISHED &&
1421 /* final newline */
1422 (args.pa_flags & FLAG_DO_PRINT) == 0)
1423 (void) fprintf(args.pa_printfile, "\n");
1424 }
1425 if (args.pa_flags & FLAG_DO_TOP)
1426 pmcstat_display_log();
1427 do_print = 0;
1428 }
1429
1430 } while (runstate != PMCSTAT_FINISHED);
1431
1432 if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) {
1433 pmcstat_topexit();
1434 args.pa_toptty = 0;
1435 }
1436
1437 /* flush any pending log entries */
1438 if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE))
1439 pmc_close_logfile();
1440
1441 pmcstat_cleanup();
1442
1443 /* check if the driver lost any samples or events */
1444 if (check_driver_stats) {
1445 if (pmc_get_driver_stats(&ds_end) < 0)
1446 err(EX_OSERR,
1447 "ERROR: Cannot retrieve driver statistics");
1448 if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull &&
1449 args.pa_verbosity > 0)
1450 warnx(
1451 "WARNING: sampling was paused at least %u time%s.\n"
1452 "Please consider tuning the \"kern.hwpmc.nsamples\" tunable.",
1453 ds_end.pm_intr_bufferfull -
1454 ds_start.pm_intr_bufferfull,
1455 ((ds_end.pm_intr_bufferfull -
1456 ds_start.pm_intr_bufferfull) != 1) ? "s" : ""
1457 );
1458 if (ds_start.pm_buffer_requests_failed !=
1459 ds_end.pm_buffer_requests_failed &&
1460 args.pa_verbosity > 0)
1461 warnx(
1462 "WARNING: at least %u event%s were discarded while running.\n"
1463 "Please consider tuning the \"kern.hwpmc.nbuffers_pcpu\" tunable.",
1464 ds_end.pm_buffer_requests_failed -
1465 ds_start.pm_buffer_requests_failed,
1466 ((ds_end.pm_buffer_requests_failed -
1467 ds_start.pm_buffer_requests_failed) != 1) ? "s" : ""
1468 );
1469 }
1470
1471 exit(EX_OK);
1472 }
1473