1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Copyright (c) 2018, Joyent, Inc.
29 */
30
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <strings.h>
34 #include <time.h>
35 #include <signal.h>
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <sys/time.h>
39 #include <sys/modctl.h>
40 #include <sys/systeminfo.h>
41 #include <limits.h>
42 #include <signal.h>
43 #include <fcntl.h>
44 #include <unistd.h>
45 #include <stropts.h>
46 #include <locale.h>
47 #include <libintl.h>
48 #include <libgen.h>
49 #include <nl_types.h>
50 #include <kstat.h>
51 #include <ctype.h>
52 #include <signal.h>
53 #include <errno.h>
54 #include <time.h>
55
56 #include "busstat.h"
57
58
59 /* Global defines */
60 static int delta = TRUE;
61 static int banner = TRUE;
62 static int max_pic_num = 1;
63 static int initial_read = TRUE;
64 static char *pgmname;
65 static kstat_ctl_t *kc; /* libkstat cookie */
66 static dev_node_t *dev_list_head = NULL;
67 static dev_node_t *dev_list_tail = NULL;
68
69 /*
70 * Global flags.
71 */
72 static char curr_dev_name[KSTAT_STRLEN];
73 static int curr_inst_num;
74
75 static void print_evt(void);
76 static void print_dev(int, char *);
77 static void parse_cmd(int);
78 static void parse_dev_inst(char *);
79 static void parse_pic_evt(char *);
80 static void add_dev_node(char *, int);
81 static void add_all_dev_node(char *);
82 static void add_evt_node(dev_node_t *);
83 static void modify_evt_node(dev_node_t *, char *);
84 static void prune_evt_nodes(dev_node_t *);
85 static void setup_evts(void);
86 static void set_evt(dev_node_t *);
87 static void read_evts(void);
88 static void read_r_evt_node(dev_node_t *, int, kstat_named_t *);
89 static void read_w_evt_node(dev_node_t *, int, kstat_named_t *);
90 static void check_dr_ops(void);
91 static void remove_dev_node(dev_node_t *);
92 static dev_node_t *find_dev_node(char *, int, int);
93 static kstat_t *find_pic_kstat(char *, int, char *);
94 static int64_t is_num(char *);
95 static void print_banner(void);
96 static void print_timestamp(void);
97 static void usage(void);
98 static void *safe_malloc(size_t);
99 static void set_timer(int);
100 static void handle_sig(int);
101 static int strisnum(const char *);
102
103 int
main(int argc,char ** argv)104 main(int argc, char **argv)
105 {
106 int c, i;
107 int interval = 1; /* Interval between displays */
108 int count = 0; /* Number of times to sample */
109 int write_evts = FALSE;
110 int pos = 0;
111
112 #if !defined(TEXT_DOMAIN)
113 #define TEXT_DOMAIN "SYS_TEST"
114 #endif
115
116 /* For I18N */
117 (void) setlocale(LC_ALL, "");
118 (void) textdomain(TEXT_DOMAIN);
119
120 pgmname = basename(argv[0]);
121
122 if ((kc = kstat_open()) == NULL) {
123 (void) fprintf(stderr, gettext("%s: could not "
124 "open /dev/kstat\n"), pgmname);
125 exit(1);
126 }
127
128 while ((c = getopt(argc, argv, "e:w:r:ahln")) != EOF) {
129 switch (c) {
130 case 'a':
131 delta = FALSE;
132 break;
133 case 'e':
134 (void) print_evt();
135 break;
136 case 'h':
137 usage();
138 break;
139 case 'l':
140 (void) print_dev(argc, argv[argc-1]);
141 break;
142 case 'n':
143 banner = FALSE;
144 break;
145 case 'r':
146 (void) parse_cmd(READ_EVT);
147 break;
148 case 'w':
149 (void) parse_cmd(WRITE_EVT);
150 write_evts = TRUE;
151 break;
152 default:
153 (void) fprintf(stderr, gettext("%s: invalid "
154 "option\n"), pgmname);
155 usage();
156 break;
157 }
158 }
159
160 if ((argc == 1) || (dev_list_head == NULL))
161 usage();
162
163 /*
164 * validate remaining operands are numeric.
165 */
166 pos = optind;
167 while (pos < argc) {
168 if (strisnum(argv[pos]) == 0) {
169 (void) fprintf(stderr,
170 gettext("%s: syntax error\n"),
171 pgmname);
172 usage();
173 }
174 pos++;
175 }
176
177 if (optind < argc) {
178 if ((interval = atoi(argv[optind])) == 0) {
179 (void) fprintf(stderr, gettext("%s: invalid "
180 "interval value\n"), pgmname);
181 exit(1);
182 }
183
184 optind++;
185 if (optind < argc)
186 if ((count = atoi(argv[optind])) <= 0) {
187 (void) fprintf(stderr, gettext("%s: "
188 "invalid iteration value.\n"),
189 pgmname);
190 exit(1);
191 }
192 }
193
194 set_timer(interval);
195
196 /*
197 * Set events for the first time.
198 */
199 if (write_evts == TRUE)
200 setup_evts();
201
202
203 if (count > 0) {
204 for (i = 0; i < count; i++) {
205 if (banner)
206 print_banner();
207
208 check_dr_ops();
209 read_evts();
210 (void) fflush(stdout);
211 (void) pause();
212 }
213 } else {
214 for (;;) {
215 if (banner)
216 print_banner();
217
218 check_dr_ops();
219 read_evts();
220 (void) fflush(stdout);
221 (void) pause();
222 }
223 }
224
225 read_evts();
226 return (0);
227 }
228
229
230 /*
231 * Display all the events that can be set on a device.
232 */
233 void
print_evt()234 print_evt()
235 {
236 kstat_t *cnt_ksp;
237 kstat_t *pic_ksp;
238 kstat_named_t *cnt_data;
239 kstat_named_t *pic_data;
240 char *device = NULL;
241 char *value;
242 int inst_num = -1;
243 int i = 0;
244 int j;
245
246 value = optarg;
247
248 /*
249 * Search through the value string for a numeric char which will
250 * be the device instance number, if the user specified one. If
251 * the user did not specify an instance then the return value from
252 * strscpn will be equal to the string length. In this case we
253 * use a default value of -1 for the kstat_lookup which causes
254 * the device number to be ignored during the search.
255 */
256 if (((i = strcspn(value, "0123456789")) > 0) && (i != strlen(value))) {
257
258 device = safe_malloc(sizeof (char) * i+1);
259 device[i] = '\0';
260 (void) strncpy(device, value, i);
261
262 value = value + i;
263 inst_num = atoi(value);
264 }
265
266 /*
267 * No instance specified.
268 */
269 if (device == NULL)
270 device = value;
271
272 /*
273 * Get the "counters" kstat, so that we can get
274 * the names of the "picN" kstats, which hold the
275 * event names.
276 */
277 if ((cnt_ksp = kstat_lookup(kc, device, inst_num, "counters"))
278 == NULL) {
279 (void) fprintf(stderr, gettext("%s: invalid device "
280 "name or instance (%s)\n"), pgmname, device);
281 exit(1);
282 }
283
284 if (kstat_read(kc, cnt_ksp, NULL) == FAIL) {
285 (void) fprintf(stderr, gettext("%s: could not read "
286 "kstat.\n"), pgmname);
287 exit(1);
288 }
289
290 cnt_data = (kstat_named_t *)cnt_ksp->ks_data;
291
292 /*
293 * Start at 1 as the first entry in the "counters"
294 * kstat is the pcr value/name. We are looking for the
295 * name of the "picN" kstats. For each one found store
296 * a pointer to it in pic_data[].
297 */
298 if (cnt_ksp->ks_ndata <= 1) {
299 (void) fprintf(stderr, gettext("%s: invalid kstat "
300 "structure.\n"), pgmname);
301 exit(1);
302 }
303
304 for (i = 1; i < cnt_ksp->ks_ndata; i++) {
305 if ((pic_ksp = find_pic_kstat(device, inst_num,
306 cnt_data[i].name)) == NULL) {
307
308 (void) fprintf(stderr, gettext("%s: could not read "
309 "pic kstat data structure for %s\n"),
310 pgmname, cnt_ksp->ks_module);
311
312 exit(1);
313 }
314
315 if (kstat_read(kc, pic_ksp, NULL) == FAIL) {
316 (void) fprintf(stderr, gettext("%s: could not read "
317 "pic kstat.\n"), pgmname);
318
319 exit(1);
320 }
321
322 pic_data = (kstat_named_t *)pic_ksp->ks_data;
323
324 (void) printf(gettext("pic%-8d\n"), i-1);
325
326 for (j = 0; j < pic_ksp->ks_ndata-1; j++) {
327 (void) printf("%-30s\n", pic_data[j].name);
328 }
329
330 (void) printf("\n");
331 }
332
333 exit(0);
334 }
335
336
337 /*
338 * Display the names and instances of the devices on the system
339 * which can support performance monitoring.
340 */
341 void
print_dev(int argc,char * str)342 print_dev(int argc, char *str)
343 {
344 kstat_t *ksp;
345 static int first_time = 1;
346
347 if ((argc > 2) || (strcmp(str, "-l") != 0)) {
348 (void) fprintf(stderr, gettext("%s: no arguments "
349 "permitted with -l option.\n"),
350 pgmname);
351 usage();
352 exit(1);
353 }
354
355 /*
356 * For each device node, print the node name (device
357 * name) and the instance numbers.
358 */
359 for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
360 if ((strcmp(ksp->ks_class, "bus") == 0) &&
361 (strcmp(ksp->ks_name, "counters") == 0)) {
362 if (first_time) {
363 (void) printf(gettext("Busstat "
364 "Device(s):\n"));
365 first_time = 0;
366 }
367 (void) printf("%s%d ", ksp->ks_module,
368 ksp->ks_instance);
369 }
370 }
371
372 if (first_time)
373 (void) fprintf(stderr, gettext("%s: No devices available "
374 "in system."), pgmname);
375
376 (void) printf("\n");
377
378 exit(0);
379 }
380
381 /*
382 * Parses the cmd line, checks all the values and
383 * creates the appropiate data structures.
384 */
385 void
parse_cmd(int mode)386 parse_cmd(int mode)
387 {
388 char *options = optarg, *value;
389 int arg_num = 0;
390
391 while ((value = (char *)strtok(options, ",=")) != NULL) {
392 /*
393 * First arg must be device name.
394 */
395 if (!arg_num) {
396 parse_dev_inst(value);
397 } else {
398 if (mode == READ_EVT) {
399 (void) fprintf(stderr, gettext("%s: "
400 "event names or pic values not "
401 "permitted with -r option.\n"),
402 pgmname);
403 usage();
404 exit(1);
405 }
406 /*
407 * Now dealing with pic values.
408 */
409 parse_pic_evt(value);
410 }
411 /*
412 * After first strtok call, must set first arg
413 * to null if wish to parse rest of string.
414 * See strtok man page.
415 */
416 if (options != NULL)
417 options = NULL;
418 arg_num++;
419 }
420 }
421
422
423 /*
424 * Parse the device name/instance section of the
425 * command line.
426 */
427 void
parse_dev_inst(char * value)428 parse_dev_inst(char *value)
429 {
430 int i;
431 char *device = NULL;
432 int malloc_flag = FALSE;
433
434 if (strlen(value) == 0) {
435 (void) fprintf(stderr, gettext("%s: No device name given.\n"),
436 pgmname);
437 exit(1);
438 }
439
440 /*
441 * Break string into device name and
442 * instance number (if given).
443 */
444 if ((i = strcspn(value, "0123456789")) > 0) {
445 if (i != strlen(value)) {
446 device = safe_malloc(sizeof (char) * i+1);
447 device[i] = '\0';
448
449 (void) strncpy(device, value, i);
450 malloc_flag = TRUE;
451
452 value = value + i;
453 }
454 }
455
456 /*
457 * No instance was specified so we assume
458 * the user wants to use ALL instances.
459 */
460 if (device == NULL) {
461 if ((device = value) == NULL) {
462 (void) fprintf(stderr, gettext("%s: no device "
463 "specified\n"), pgmname);
464 exit(1);
465 }
466
467 /*
468 * Set global flags.
469 */
470 (void) strcpy(curr_dev_name, device);
471 curr_inst_num = -1;
472
473 add_all_dev_node(device);
474 goto clean_up;
475 }
476
477 /*
478 * Set global flags.
479 */
480 (void) strcpy(curr_dev_name, device);
481 curr_inst_num = atoi(value);
482
483 add_dev_node(device, curr_inst_num);
484
485 clean_up:
486 if (malloc_flag) {
487 free(device);
488 }
489 }
490
491
492 /*
493 * Adds new event nodes to existing ones, modifies existing ones, or
494 * prunes existing ones.
495 *
496 * A specific instance call will overwrite an earlier all
497 * instances call, but *not* vice-versa.
498 *
499 * All the state transitions are given below.
500 *
501 *
502 * Call Type
503 * STATE | Specific Instance All Instances.
504 * ======================================================
505 * INIT | Change state to | Change state to ALL,
506 * | INST, add events | add events.
507 * | |
508 * INST | State unchanged, | No change.
509 * | Add events. |
510 * | |
511 * ALL | Change state to | State unchanged,
512 * | INST, replace events. | add events.
513 */
514 void
parse_pic_evt(char * value)515 parse_pic_evt(char *value)
516 {
517 dev_node_t *dev_node;
518 char *evt_name;
519 int pic_num;
520
521 if (strlen(value) <= PIC_STR_LEN) {
522 (void) fprintf(stderr, gettext("%s: no pic number "
523 "specified.\n"), pgmname);
524 exit(1);
525 }
526
527 if (strncmp(value, "pic", PIC_STR_LEN) != 0) {
528 (void) fprintf(stderr, gettext("%s: missing pic "
529 "specifier\n"), pgmname);
530 usage();
531 }
532
533 /*
534 * Step over the 'pic' part of the string to
535 * get the pic number.
536 */
537 value = value + PIC_STR_LEN;
538 pic_num = atoi(value);
539
540 if ((pic_num == -1) || (pic_num > max_pic_num -1)) {
541 (void) fprintf(stderr, gettext("%s: invalid pic "
542 "number.\n"), pgmname);
543 exit(1);
544 }
545
546 if ((evt_name = (char *)strtok(NULL, "=,")) == NULL) {
547 (void) fprintf(stderr, gettext("%s: no event "
548 "specified.\n"), pgmname);
549 exit(1);
550 }
551
552 /*
553 * Dealing with a specific instance.
554 */
555 if (curr_inst_num >= 0) {
556 if ((dev_node = find_dev_node(curr_dev_name,
557 curr_inst_num, pic_num)) == NULL) {
558 (void) fprintf(stderr, gettext("%s: could not find "
559 "data structures for %s\n"),
560 pgmname, curr_dev_name);
561 exit(1);
562 }
563
564 if (dev_node->r_w == EVT_READ) {
565 modify_evt_node(dev_node, evt_name);
566 dev_node->r_w = EVT_WRITE;
567 dev_node->state = STATE_INST;
568
569 } else if ((dev_node->r_w == EVT_WRITE) &&
570 (dev_node->state == STATE_ALL)) {
571
572 prune_evt_nodes(dev_node);
573 modify_evt_node(dev_node, evt_name);
574 dev_node->state = STATE_INST;
575
576 } else if ((dev_node->r_w == EVT_WRITE) &&
577 (dev_node->state == STATE_INST)) {
578
579 add_evt_node(dev_node);
580 modify_evt_node(dev_node, evt_name);
581 }
582
583 return;
584 }
585
586 /*
587 * Dealing with all instances of a specific device.
588 */
589 dev_node = dev_list_head;
590 while (dev_node != NULL) {
591 if ((strcmp(dev_node->name, curr_dev_name) == 0) &&
592 (dev_node->pic_num == pic_num)) {
593
594 if (dev_node->r_w == EVT_READ) {
595 modify_evt_node(dev_node,
596 evt_name);
597
598 dev_node->r_w = EVT_WRITE;
599 dev_node->state = STATE_ALL;
600
601 } else if ((dev_node->r_w == EVT_WRITE) &&
602 (dev_node->state == STATE_ALL)) {
603
604 add_evt_node(dev_node);
605 modify_evt_node(dev_node, evt_name);
606
607 }
608 }
609 dev_node = dev_node->next;
610 }
611 }
612
613
614 /*
615 * Create a dev_node structure for this device if one does not
616 * already exist.
617 */
618 void
add_dev_node(char * dev_name,int inst_num)619 add_dev_node(char *dev_name, int inst_num)
620 {
621 dev_node_t *new_dev_node;
622 kstat_named_t *cnt_data;
623 kstat_t *cnt_ksp;
624 kstat_t *pic_ksp;
625 int pic_num;
626
627
628 if ((cnt_ksp = kstat_lookup(kc, dev_name,
629 inst_num, "counters")) == NULL) {
630 (void) fprintf(stderr, gettext("%s: invalid device "
631 "name or instance (%s%d)\n"), pgmname,
632 dev_name, inst_num);
633 exit(1);
634 }
635
636 if (kstat_read(kc, cnt_ksp, NULL) == FAIL) {
637 (void) fprintf(stderr, gettext("%s : could not read counters "
638 "kstat for device %s.\n"), pgmname, dev_name);
639 exit(1);
640 }
641
642 cnt_data = (kstat_named_t *)cnt_ksp->ks_data;
643
644 if (cnt_ksp->ks_ndata <= 1) {
645 (void) fprintf(stderr, gettext("%s : invalid "
646 "kstat structure.\n"), pgmname);
647 exit(1);
648 }
649
650 /*
651 * max_pic_num used to format headers correctly
652 * for printing.
653 */
654 if (cnt_ksp->ks_ndata-1 > max_pic_num)
655 max_pic_num = cnt_ksp->ks_ndata-1;
656
657 /* for each pic... */
658 for (pic_num = 0; pic_num < cnt_ksp->ks_ndata-1; pic_num++) {
659 if (find_dev_node(dev_name, inst_num, pic_num) != NULL) {
660 /* Node already exists */
661 continue;
662 }
663
664 new_dev_node = safe_malloc(sizeof (dev_node_t));
665 bzero(new_dev_node, sizeof (dev_node_t));
666
667 (void) strcpy(new_dev_node->name, dev_name);
668 new_dev_node->dev_inst = inst_num;
669 new_dev_node->pic_num = pic_num;
670
671 new_dev_node->cnt_ksp = cnt_ksp;
672
673 if ((pic_ksp = find_pic_kstat(dev_name, inst_num,
674 cnt_data[pic_num+1].name)) == NULL) {
675
676 (void) fprintf(stderr, gettext("%s: could not find "
677 "pic kstat structure for %s.\n"),
678 pgmname, cnt_ksp->ks_module);
679 exit(1);
680 }
681
682 new_dev_node->pic_ksp = pic_ksp;
683
684 add_evt_node(new_dev_node);
685
686 new_dev_node->state = STATE_INIT;
687 new_dev_node->r_w = EVT_READ;
688
689 if (dev_list_head == NULL) {
690 dev_list_head = new_dev_node;
691 dev_list_tail = new_dev_node;
692
693 } else if (find_dev_node(dev_name, inst_num, pic_num) == NULL) {
694 dev_list_tail->next = new_dev_node;
695 dev_list_tail = new_dev_node;
696 }
697 }
698 }
699
700
701 /*
702 * Add all possible instances of a device.
703 */
704 void
add_all_dev_node(char * dev_name)705 add_all_dev_node(char *dev_name)
706 {
707 kstat_t *ksp;
708 int match = 0;
709
710 for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
711 if ((strcmp(ksp->ks_class, "bus") == 0) &&
712 (strcmp(ksp->ks_name, "counters") == 0) &&
713 (strcmp(ksp->ks_module, dev_name) == 0)) {
714 match = 1;
715 add_dev_node(dev_name, ksp->ks_instance);
716 }
717 }
718
719 if (match == 0) {
720 (void) fprintf(stderr,
721 gettext("%s: invalid device name (%s)\n"),
722 pgmname, dev_name);
723 exit(1);
724 }
725 }
726
727
728 /*
729 * Add an event node to a specified device node.
730 */
731 void
add_evt_node(dev_node_t * dev_node)732 add_evt_node(dev_node_t *dev_node)
733 {
734 evt_node_t *new_evt_node;
735 evt_node_t *curr_evt_node;
736
737 new_evt_node = safe_malloc(sizeof (evt_node_t));
738 bzero(new_evt_node, sizeof (evt_node_t));
739
740 (void) strcpy(new_evt_node->evt_name, "");
741
742 if (dev_node->evt_node == NULL) {
743 dev_node->evt_node = new_evt_node;
744 new_evt_node->next = new_evt_node;
745 return;
746 } else {
747 curr_evt_node = dev_node->evt_node;
748 while (curr_evt_node->next != dev_node->evt_node)
749 curr_evt_node = curr_evt_node->next;
750
751 curr_evt_node->next = new_evt_node;
752 new_evt_node->next = dev_node->evt_node;
753 }
754 }
755
756
757 /*
758 * Fill in or change the fields of an evt node.
759 */
760 void
modify_evt_node(dev_node_t * dev_node,char * evt_name)761 modify_evt_node(dev_node_t *dev_node, char *evt_name)
762 {
763 evt_node_t *evt_node;
764 kstat_t *pic_ksp;
765 kstat_named_t *pic_data;
766 int64_t evt_num = 0;
767 int evt_match = 0;
768 int i;
769
770 evt_node = dev_node->evt_node;
771
772 /*
773 * Find the last event node.
774 */
775 if (evt_node->next != evt_node) {
776 while (evt_node->next != dev_node->evt_node) {
777 evt_node = evt_node->next;
778 }
779 }
780
781 evt_node->prev_count = 0;
782 evt_node->total = 0;
783
784 pic_ksp = dev_node->pic_ksp;
785
786 if (kstat_read(kc, pic_ksp, NULL) == FAIL) {
787 (void) fprintf(stderr, gettext("%s: could not read "
788 "pic kstat.\n"), pgmname);
789 exit(1);
790 }
791
792 pic_data = (kstat_named_t *)dev_node->pic_ksp->ks_data;
793
794 /*
795 * The event can either be given as a event name (string) or
796 * as a pcr mask. If given as pcr mask, we try to match it
797 * to an event name, and use that name. Otherwise we just use
798 * the pcr mask value.
799 */
800 if ((evt_num = is_num(evt_name)) == EVT_STR) {
801 (void) strcpy(evt_node->evt_name, evt_name);
802
803 for (i = 0; i < dev_node->pic_ksp->ks_ndata; i++) {
804 if (strcmp(evt_name, pic_data[i].name) == 0) {
805 evt_node->evt_pcr_mask = pic_data[i].value.ui64;
806 return;
807 }
808 }
809
810 (void) fprintf(stderr,
811 gettext("%s: %s is not a valid event name.\n"),
812 pgmname, evt_name);
813 exit(1);
814
815 } else {
816 /*
817 * See if the pcr mask given by the user matches that for any
818 * existing event.
819 */
820 for (i = 0; i < dev_node->pic_ksp->ks_ndata; i++) {
821 if (evt_num == pic_data[i].value.ui64) {
822 (void) strcpy(evt_node->evt_name,
823 pic_data[i].name);
824 evt_match = 1;
825 break;
826 }
827 }
828
829 if (evt_match == 0)
830 (void) sprintf(evt_node->evt_name, "%llx", evt_num);
831
832 evt_node->evt_pcr_mask = evt_num;
833 }
834 }
835
836
837 /*
838 * Removes all bar one of the evt_nodes that are hanging off the
839 * specified dev_node.
840 */
841 void
prune_evt_nodes(dev_node_t * dev_node)842 prune_evt_nodes(dev_node_t *dev_node)
843 {
844 evt_node_t *next_evt_node;
845 evt_node_t *curr_evt_node;
846
847 /*
848 * Only one evt node, nothing for us to do.
849 */
850 if (dev_node->evt_node->next == dev_node->evt_node) {
851 return;
852 }
853
854 curr_evt_node = dev_node->evt_node->next;
855 dev_node->evt_node->next = dev_node->evt_node;
856
857 while (curr_evt_node != dev_node->evt_node) {
858 next_evt_node = curr_evt_node->next;
859 free(curr_evt_node);
860 curr_evt_node = next_evt_node;
861 }
862 }
863
864
865 /*
866 * Set the events for each pic on each device instance.
867 */
868 void
setup_evts()869 setup_evts()
870 {
871 dev_node_t *dev_node;
872
873 dev_node = dev_list_head;
874
875 while (dev_node != NULL) {
876 if (dev_node->r_w == EVT_WRITE)
877 set_evt(dev_node);
878
879 dev_node = dev_node->next;
880 }
881 }
882
883
884 /*
885 * Set the appropiate events. Only called for event nodes
886 * that are marked EVT_WRITE.
887 */
888 void
set_evt(dev_node_t * dev_node)889 set_evt(dev_node_t *dev_node)
890 {
891 kstat_named_t *cnt_data;
892 kstat_named_t *pic_data;
893 kstat_t *cnt_ksp;
894 kstat_t *pic_ksp;
895 evt_node_t *evt_node;
896 uint64_t clear_pcr_mask;
897 uint64_t pcr;
898 int pic_num;
899
900 cnt_ksp = dev_node->cnt_ksp;
901 pic_ksp = dev_node->pic_ksp;
902 pic_num = dev_node->pic_num;
903 evt_node = dev_node->evt_node;
904
905 /* Read the "counters" kstat */
906 if (kstat_read(kc, cnt_ksp, NULL) == FAIL) {
907 (void) fprintf(stderr, gettext("%s: could "
908 "not set event's.\n"), pgmname);
909 exit(1);
910 }
911
912 cnt_data = (kstat_named_t *)cnt_ksp->ks_data;
913
914 if (kstat_read(kc, pic_ksp, NULL) == FAIL) {
915 (void) fprintf(stderr, gettext("%s: could "
916 "not set event's.\n"), pgmname);
917 exit(1);
918 }
919
920 pic_data = (kstat_named_t *)pic_ksp->ks_data;
921 clear_pcr_mask = pic_data[pic_ksp->ks_ndata-1].value.ui64;
922
923 if ((pic_num < 0) || (pic_num > cnt_ksp->ks_ndata-1)) {
924 (void) fprintf(stderr,
925 gettext("%s: invalid pic #%d.\n"),
926 pgmname, pic_num);
927 exit(1);
928 }
929
930 /*
931 * Store the previous value that is on the pic
932 * so that we can calculate the delta value
933 * later.
934 */
935 evt_node->prev_count = cnt_data[pic_num+1].value.ui64;
936
937
938 /*
939 * Read the current pcr value from device.
940 */
941 pcr = cnt_data[0].value.ui64;
942
943 /*
944 * Clear the section of the pcr which corresponds to the
945 * pic we are setting events on. Also clear the pcr value
946 * which is stored in the instance node.
947 *
948 */
949 pcr = pcr & clear_pcr_mask;
950
951 /*
952 * Set the event.
953 */
954 pcr = pcr | evt_node->evt_pcr_mask;
955 cnt_data[0].value.ui64 = pcr;
956
957 /*
958 * Write the value back to the kstat, to make it
959 * visible to the underlying driver.
960 */
961 if (kstat_write(kc, cnt_ksp, NULL) == FAIL) {
962 (void) fprintf(stderr, gettext("%s: could not set events "
963 "(setting events requires root "
964 "permission).\n"), pgmname);
965 exit(1);
966 }
967 }
968
969
970 /*
971 * Works through the list of device nodes, reading events
972 * and where appropiate setting new events (multiplexing).
973 */
974 void
read_evts()975 read_evts()
976 {
977 dev_node_t *dev_node;
978 kstat_t *cnt_ksp;
979 kstat_named_t *cnt_data;
980 char tmp_str[30];
981 int iter = 0;
982
983 dev_node = dev_list_head;
984
985 while (dev_node != NULL) {
986 if (iter == 0)
987 print_timestamp();
988 /*
989 * First read of all the counters is done
990 * to establish a baseline for the counts.
991 * This data is not printed.
992 */
993 if ((!initial_read) && (iter == 0)) {
994 (void) snprintf(tmp_str, sizeof (tmp_str), "%s%d",
995 dev_node->name, dev_node->dev_inst);
996 (void) printf("%-7s", tmp_str);
997 }
998
999 cnt_ksp = (kstat_t *)dev_node->cnt_ksp;
1000
1001 if (kstat_read(kc, cnt_ksp, NULL) == FAIL) {
1002 (void) fprintf(stderr, gettext("%s: device %s%d "
1003 "(pic %d) no longer valid.\n"),
1004 pgmname, dev_node->name,
1005 dev_node->dev_inst,
1006 dev_node->pic_num);
1007 remove_dev_node(dev_node);
1008 dev_node = dev_list_head;
1009 continue;
1010 }
1011
1012 cnt_data = (kstat_named_t *)cnt_ksp->ks_data;
1013
1014 if (dev_node->r_w == EVT_READ) {
1015 read_r_evt_node(dev_node, dev_node->pic_num, cnt_data);
1016 iter++;
1017 } else {
1018 read_w_evt_node(dev_node, dev_node->pic_num, cnt_data);
1019 iter++;
1020 }
1021
1022 if ((!initial_read) && (iter == max_pic_num)) {
1023 iter = 0;
1024 (void) printf("\n");
1025 }
1026
1027 /*
1028 * If there is more than one event node
1029 * per-pic then we are multiplexing.
1030 */
1031 if ((dev_node->evt_node->next != dev_node->evt_node) &&
1032 (!initial_read)) {
1033 dev_node->evt_node = dev_node->evt_node->next;
1034 set_evt(dev_node);
1035 }
1036 dev_node = dev_node->next;
1037 }
1038 initial_read = FALSE;
1039 }
1040
1041
1042 /*
1043 * Read a node that is marked as EVT_READ
1044 */
1045 void
read_r_evt_node(dev_node_t * dev_node,int pic_num,kstat_named_t * cnt_data)1046 read_r_evt_node(dev_node_t *dev_node, int pic_num, kstat_named_t *cnt_data)
1047 {
1048 evt_node_t *evt_node;
1049 kstat_t *pic_ksp;
1050 kstat_named_t *pic_data;
1051 uint64_t pcr_read;
1052 uint64_t clear_pcr_mask;
1053 uint64_t delta_count;
1054 int i;
1055 int match = 0;
1056 int evt_blank = 1;
1057
1058 evt_node = dev_node->evt_node;
1059
1060 pic_ksp = (kstat_t *)dev_node->pic_ksp;
1061
1062 if (kstat_read(kc, pic_ksp, NULL) == FAIL) {
1063 (void) fprintf(stderr, gettext("%s: device %s%d "
1064 "(pic %d) no longer valid.\n"), pgmname,
1065 dev_node->name, dev_node->dev_inst,
1066 dev_node->pic_num);
1067 remove_dev_node(dev_node);
1068 return;
1069 }
1070
1071 pic_data = (kstat_named_t *)pic_ksp->ks_data;
1072 clear_pcr_mask = pic_data[pic_ksp->ks_ndata-1].value.ui64;
1073
1074 /*
1075 * Get PCR value from device. We extract the portion
1076 * of the PCR relating to the pic we are interested by
1077 * AND'ing the inverse of the clear mask for this pic.
1078 *
1079 * The clear mask is usually used to clear the appropiate
1080 * section of the PCR before we write events into it. So
1081 * by using the inverse of the mask, we zero everything
1082 * *but* the section we are interested in.
1083 */
1084 pcr_read = cnt_data[0].value.ui64;
1085 pcr_read = pcr_read & ~(clear_pcr_mask);
1086
1087 /*
1088 * If the event name is blank this is the first time that
1089 * this node has been accessed, so we read the pcr and
1090 * from that we get the event name if it exists.
1091 *
1092 * If the pcr read from the device does not match that
1093 * stored in the node, then it means that the event has
1094 * changed from its previous value, so we need to re-read
1095 * all the values.
1096 */
1097 if ((strcmp(evt_node->evt_name, "") == 0) ||
1098 (pcr_read != evt_node->evt_pcr_mask)) {
1099
1100 for (i = 0; i < pic_ksp->ks_ndata-1; i++) {
1101 if (pcr_read == pic_data[i].value.ui64) {
1102 match = TRUE;
1103 break;
1104 }
1105 }
1106
1107 /*
1108 * Able to resolve pcr value to a event name.
1109 */
1110 if (match) {
1111 (void) strcpy(evt_node->evt_name, pic_data[i].name);
1112 evt_node->evt_pcr_mask = pcr_read;
1113 evt_node->total = 0;
1114 evt_node->prev_count =
1115 cnt_data[pic_num+1].value.ui64;
1116
1117 if ((evt_blank) && (!initial_read)) {
1118 (void) printf("%s\t%-8d\t",
1119 evt_node->evt_name, 0);
1120 evt_blank = 0;
1121 }
1122
1123 } else {
1124 (void) sprintf(evt_node->evt_name, "0x%llx", pcr_read);
1125 evt_node->evt_pcr_mask = pcr_read;
1126 evt_node->total = 0;
1127 evt_node->prev_count =
1128 cnt_data[pic_num+1].value.ui64;
1129
1130 if ((evt_blank) && (!initial_read)) {
1131 (void) printf("%s\t%-8d\t",
1132 evt_node->evt_name, 0);
1133 evt_blank = 0;
1134 }
1135
1136 }
1137 } else {
1138 /* Deal with wraparound of the counters */
1139 if (cnt_data[pic_num+1].value.ui64 < evt_node->prev_count) {
1140
1141 delta_count = (UINT32_MAX-evt_node->prev_count) +
1142 cnt_data[pic_num+1].value.ui64;
1143 } else {
1144 /* Calcalate delta value */
1145 delta_count = cnt_data[pic_num+1].value.ui64
1146 - evt_node->prev_count;
1147 }
1148
1149
1150 /*
1151 * Store value so that we can calculate delta next
1152 * time through.
1153 */
1154 evt_node->prev_count = cnt_data[pic_num+1].value.ui64;
1155
1156 /* Update count total */
1157 evt_node->total += delta_count;
1158
1159 if (delta) {
1160 (void) printf("%-20s %-9lld ",
1161 evt_node->evt_name, delta_count);
1162 } else {
1163
1164 (void) printf("%-20s %-9lld ",
1165 evt_node->evt_name, evt_node->total);
1166 }
1167 }
1168 }
1169
1170
1171 /*
1172 * Read event nodes marked as EVT_WRITE
1173 */
1174 void
read_w_evt_node(dev_node_t * dev_node,int pic_num,kstat_named_t * cnt_data)1175 read_w_evt_node(dev_node_t *dev_node, int pic_num, kstat_named_t *cnt_data)
1176 {
1177 kstat_t *pic_ksp;
1178 kstat_named_t *pic_data;
1179 evt_node_t *evt_node;
1180 uint64_t delta_count;
1181 uint64_t pcr_read;
1182 uint64_t clear_pcr_mask;
1183
1184 evt_node = dev_node->evt_node;
1185
1186 pic_ksp = (kstat_t *)dev_node->pic_ksp;
1187
1188 if (kstat_read(kc, pic_ksp, NULL) == FAIL) {
1189 (void) fprintf(stderr, gettext("%s: could not read "
1190 "%s%d\n"), pgmname, dev_node->name,
1191 dev_node->dev_inst);
1192 remove_dev_node(dev_node);
1193 return;
1194 }
1195
1196 pic_data = (kstat_named_t *)pic_ksp->ks_data;
1197 clear_pcr_mask = pic_data[pic_ksp->ks_ndata-1].value.ui64;
1198
1199 /*
1200 * Get PCR value from device. We extract the portion
1201 * of the PCR relating to the pic we are interested by
1202 * AND'ing the inverse of the clear mask for this pic.
1203 *
1204 * The clear mask is usually used to clear the appropiate
1205 * section of the PCR before we write events into it. So
1206 * by using the inverse of the mask, we zero everything
1207 * *but* the section we are interested in.
1208 */
1209 pcr_read = cnt_data[0].value.ui64;
1210 pcr_read = pcr_read & ~(clear_pcr_mask);
1211
1212 /*
1213 * If the pcr value from the device does not match the
1214 * stored value, then the events on at least one of the
1215 * pics must have been change by another busstat instance.
1216 *
1217 * Regard this as a fatal error.
1218 */
1219 if (pcr_read != evt_node->evt_pcr_mask) {
1220 (void) fprintf(stderr, gettext("%s: events changed (possibly "
1221 "by another busstat).\n"), pgmname);
1222 exit(2);
1223 }
1224
1225 /*
1226 * Calculate delta, and then store value just read to allow us to
1227 * calculate delta next time around.
1228 */
1229 /* Deal with wraparound of the counters */
1230 if (cnt_data[pic_num+1].value.ui64 < evt_node->prev_count) {
1231
1232 delta_count = (UINT32_MAX-evt_node->prev_count) +
1233 cnt_data[pic_num+1].value.ui64;
1234 } else {
1235 /* Calcalate delta value */
1236 delta_count = cnt_data[pic_num+1].value.ui64
1237 - evt_node->prev_count;
1238 }
1239
1240 evt_node->prev_count = cnt_data[pic_num+1].value.ui64;
1241
1242 if (initial_read) {
1243 evt_node->total = 0;
1244
1245 } else {
1246 /* Update count total */
1247 evt_node->total += delta_count;
1248
1249 if (delta) {
1250 (void) printf("%-20s %-9lld ",
1251 evt_node->evt_name, delta_count);
1252 } else {
1253 (void) printf("%-20s %-9lld ",
1254 evt_node->evt_name, evt_node->total);
1255 }
1256 }
1257 }
1258
1259
1260 /*
1261 * Check to see if any DR operations have occured, and deal with the
1262 * consequences.
1263 *
1264 * Use the Kstat chain ID to check for DR operations. If the ID has
1265 * changed then some kstats on system have been modified, we check
1266 * all the data structures to see are they still valid. If they are
1267 * not we remove them.
1268 */
1269 void
check_dr_ops()1270 check_dr_ops()
1271 {
1272 dev_node_t *dev_node;
1273 kid_t new_id;
1274 kstat_t *ksp;
1275 int match = 0;
1276
1277 if ((new_id = kstat_chain_update(kc)) < 0) {
1278 (void) fprintf(stderr, gettext("%s: could not get "
1279 "kstat chain id\n"), pgmname);
1280 exit(1);
1281 }
1282
1283 if (new_id == 0) {
1284 /* Kstat chain has not changed. */
1285 return;
1286 }
1287
1288 /*
1289 * Scan the chain of device nodes, making sure that their associated
1290 * kstats are still present. If not we remove the appropiate node.
1291 */
1292 dev_node = dev_list_head;
1293
1294 while (dev_node != NULL) {
1295 for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
1296 if ((strcmp("bus", ksp->ks_class) == 0) &&
1297 (strcmp("counters", ksp->ks_name) == 0) &&
1298 (strcmp(dev_node->name, ksp->ks_module) == 0) &&
1299 (ksp->ks_instance == dev_node->dev_inst)) {
1300 match = 1;
1301 break;
1302 }
1303 }
1304 if (match == 0) {
1305 (void) fprintf(stderr, gettext("%s: device %s%d"
1306 " (pic %d) no longer valid.\n"), pgmname,
1307 dev_node->name, dev_node->dev_inst,
1308 dev_node->pic_num);
1309
1310 remove_dev_node(dev_node);
1311 }
1312 dev_node = dev_node->next;
1313 }
1314 }
1315
1316
1317
1318 /*
1319 * Remove a device node and its associated event nodes.
1320 */
1321 void
remove_dev_node(dev_node_t * dev_node)1322 remove_dev_node(dev_node_t *dev_node)
1323 {
1324 dev_node_t *curr_node;
1325 dev_node_t *prev_node;
1326 evt_node_t *curr_evt_node;
1327 evt_node_t *next_evt_node;
1328 evt_node_t *start_pos;
1329
1330 curr_node = dev_list_head;
1331
1332 if (curr_node == dev_node) {
1333 dev_list_head = dev_node->next;
1334
1335 if (dev_list_head == NULL) {
1336 (void) fprintf(stderr, gettext("%s: no "
1337 "devices left to monitor.\n"),
1338 pgmname);
1339 exit(1);
1340 }
1341
1342 /* Remove each event node first */
1343 start_pos = dev_node->evt_node;
1344 curr_evt_node = start_pos->next;
1345
1346 while (curr_evt_node != start_pos) {
1347 next_evt_node = curr_evt_node->next;
1348
1349 free(curr_evt_node);
1350 curr_evt_node = next_evt_node;
1351 }
1352
1353 free(start_pos);
1354 free(dev_node);
1355 return;
1356 }
1357
1358 /* Find the device node */
1359 prev_node = dev_list_head;
1360 curr_node = prev_node->next;
1361
1362 while (curr_node != NULL) {
1363 if (curr_node == dev_node) {
1364 prev_node->next = curr_node->next;
1365
1366 /* Remove each event node first */
1367 start_pos = dev_node->evt_node;
1368 curr_evt_node = start_pos->next;
1369
1370 while (curr_evt_node != start_pos) {
1371 next_evt_node = curr_evt_node->next;
1372
1373 free(curr_evt_node);
1374 curr_evt_node = next_evt_node;
1375 }
1376 free(start_pos);
1377
1378 free(dev_node);
1379 return;
1380 }
1381 prev_node = curr_node;
1382 curr_node = curr_node->next;
1383 }
1384 }
1385
1386
1387 /*
1388 * Find a device node in the linked list of dev_nodes. Match
1389 * is done on device name, and instance number.
1390 */
1391 dev_node_t *
find_dev_node(char * name,int inst_num,int pic_num)1392 find_dev_node(char *name, int inst_num, int pic_num)
1393 {
1394 dev_node_t *curr_node;
1395
1396 curr_node = dev_list_head;
1397
1398 while (curr_node != NULL) {
1399 if ((strcmp(curr_node->name, name) == 0) &&
1400 (curr_node->dev_inst == inst_num) &&
1401 (curr_node->pic_num == pic_num)) {
1402 return (curr_node);
1403 }
1404
1405 curr_node = curr_node->next;
1406 }
1407
1408 return (NULL);
1409 }
1410
1411
1412 /*
1413 * Determines whether the string represents a event name
1414 * or a numeric value. Numeric value can be dec, hex
1415 * or octal. All are converted to long int.
1416 */
1417 int64_t
is_num(char * name)1418 is_num(char *name)
1419 {
1420 char *remainder = NULL;
1421 int64_t num;
1422
1423 num = (int64_t)strtol(name, &remainder, 0);
1424
1425 if (name == remainder) {
1426 return (EVT_STR);
1427 } else {
1428 return (num);
1429 }
1430 }
1431
1432
1433 /*
1434 * Find a pointer to the specified picN kstat. First
1435 * search for the specific kstat, and if that can't
1436 * be found search for any picN kstat belonging to this device.
1437 */
1438 kstat_t *
find_pic_kstat(char * dev_name,int inst_num,char * pic)1439 find_pic_kstat(char *dev_name, int inst_num, char *pic)
1440 {
1441 kstat_t *ksp;
1442 kstat_t *p_ksp;
1443
1444 /* Look for specific picN kstat */
1445 if ((p_ksp = kstat_lookup(kc, dev_name, inst_num, pic)) == NULL) {
1446
1447 for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
1448 if ((strcmp(ksp->ks_class, "bus") == 0) &&
1449 (strcmp(ksp->ks_name, pic) == 0) &&
1450 (strcmp(ksp->ks_module, dev_name) == 0)) {
1451
1452 return (ksp);
1453 }
1454 }
1455 }
1456 return (p_ksp);
1457 }
1458
1459
1460 /*
1461 * Print column titles.
1462 * Can be turned off by -n option.
1463 */
1464 void
print_banner()1465 print_banner()
1466 {
1467 int i;
1468
1469 (void) printf("time dev ");
1470
1471 for (i = 0; i < max_pic_num; i++)
1472 (void) printf("event%d "
1473 "pic%d ", i, i);
1474
1475 (void) printf("\n");
1476
1477 banner = FALSE;
1478 }
1479
1480
1481 /*
1482 * Print the elapsed time in seconds, since the last call.
1483 */
1484 void
print_timestamp()1485 print_timestamp()
1486 {
1487 static hrtime_t curr_time = 0;
1488 static hrtime_t total_elapsed = 0;
1489 hrtime_t new_time = 0;
1490 hrtime_t elapsed = 0;
1491 hrtime_t rem = 0;
1492
1493 if (initial_read) {
1494 curr_time = (uint64_t)gethrtime();
1495 return;
1496 }
1497
1498 new_time = gethrtime();
1499
1500 elapsed = (new_time - curr_time)/NANO;
1501
1502 /* Round up time value if necessary */
1503 rem = (new_time - curr_time)%NANO;
1504 if (rem >= NANO/2)
1505 elapsed += 1;
1506
1507 total_elapsed += elapsed;
1508
1509 (void) printf("%-4llu ", total_elapsed);
1510
1511 curr_time = new_time;
1512 }
1513
1514
1515 void
usage()1516 usage()
1517 {
1518 (void) printf(gettext("Usage : busstat [-a] [-h] [-l] [-n]\n"
1519 " [-e device-inst]\n"
1520 " [-w device-inst "
1521 "[,pic0=<event>] [,picN=<event>] ]\n"
1522 " [-r device-inst]\n"
1523 " [ interval [count] ]\n"));
1524
1525 exit(2);
1526 }
1527
1528
1529 void *
safe_malloc(size_t size)1530 safe_malloc(size_t size)
1531 {
1532 void *a;
1533
1534 if ((a = malloc(size)) == NULL) {
1535 (void) fprintf(stderr,
1536 gettext("%s: out of memory.\n"), pgmname);
1537 exit(1);
1538 }
1539
1540 return (a);
1541 }
1542
1543 /*
1544 * Create and arm the timer.
1545 */
1546 void
set_timer(int interval)1547 set_timer(int interval)
1548 {
1549 timer_t t_id; /* Timer id */
1550 itimerspec_t time_struct;
1551 struct sigevent sig_struct;
1552 struct sigaction act;
1553
1554 bzero(&sig_struct, sizeof (struct sigevent));
1555 bzero(&act, sizeof (struct sigaction));
1556
1557 /* Create timer */
1558 sig_struct.sigev_notify = SIGEV_SIGNAL;
1559 sig_struct.sigev_signo = SIGUSR1;
1560 sig_struct.sigev_value.sival_int = 0;
1561
1562 if (timer_create(CLOCK_REALTIME, &sig_struct, &t_id) != 0) {
1563 (void) fprintf(stderr, gettext("%s: Timer creation failed.\n"),
1564 pgmname);
1565 exit(1);
1566 }
1567
1568 act.sa_handler = handle_sig;
1569
1570 if (sigaction(SIGUSR1, &act, NULL) != 0) {
1571 (void) fprintf(stderr, gettext("%s: could not setup signal "
1572 "handler"), pgmname);
1573 exit(1);
1574 }
1575
1576 time_struct.it_value.tv_sec = interval;
1577 time_struct.it_value.tv_nsec = 0;
1578 time_struct.it_interval.tv_sec = interval;
1579 time_struct.it_interval.tv_nsec = 0;
1580
1581 /* Arm timer */
1582 if ((timer_settime(t_id, 0, &time_struct, NULL)) != 0) {
1583 (void) fprintf(stderr, gettext("%s: Setting timer failed.\n"),
1584 pgmname);
1585 exit(1);
1586 }
1587 }
1588
1589
1590 /* ARGSUSED */
1591 void
handle_sig(int x)1592 handle_sig(int x)
1593 {
1594 }
1595
1596 /*
1597 * return a boolean value indicating whether or not
1598 * a string consists solely of characters which are
1599 * digits 0..9
1600 */
1601 int
strisnum(const char * s)1602 strisnum(const char *s)
1603 {
1604 for (; *s != '\0'; s++) {
1605 if (*s < '0' || *s > '9')
1606 return (0);
1607 }
1608 return (1);
1609 }
1610