2 * Copyright (c) 1997, 1998 Kenneth D. Merry.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * $FreeBSD: src/usr.sbin/iostat/iostat.c,v 1.17.2.2 2001/07/19 04:15:42 kris Exp $
31 * Parts of this program are derived from the original FreeBSD iostat
35 * Copyright (c) 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * Ideas for the new iostat statistics output modes taken from the NetBSD
67 * Copyright (c) 1996 John M. Vinopal
68 * All rights reserved.
70 * Redistribution and use in source and binary forms, with or without
71 * modification, are permitted provided that the following conditions
73 * 1. Redistributions of source code must retain the above copyright
74 * notice, this list of conditions and the following disclaimer.
75 * 2. Redistributions in binary form must reproduce the above copyright
76 * notice, this list of conditions and the following disclaimer in the
77 * documentation and/or other materials provided with the distribution.
78 * 3. All advertising materials mentioning features or use of this software
79 * must display the following acknowledgement:
80 * This product includes software developed for the NetBSD Project
82 * 4. The name of the author may not be used to endorse or promote products
83 * derived from this software without specific prior written permission.
85 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
86 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
87 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
88 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
89 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
90 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
91 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
92 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
93 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
98 #include <sys/param.h>
99 #include <sys/errno.h>
100 #include <sys/ttycom.h>
113 struct statinfo cur, last;
114 uint64_t tk_nin, old_tk_nin, diff_tk_nin;
115 uint64_t tk_nout, old_tk_nout, diff_tk_nout;
116 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
117 double cp_time_total;
119 struct device_selection *dev_select;
121 int dflag = 0, Dflag=0, Iflag = 0, Cflag = 0, Tflag = 0, oflag = 0, Kflag = 0;
123 /* local function declarations */
124 static void usage(void);
125 static void phdr(int signo);
126 static void devstats(int perf_select);
127 static void cpustats(void);
128 static void adddeletion(const char *prefix,
129 int num_selected, char ***deletions, int *num_deletions);
135 * We also support the following 'traditional' syntax:
136 * iostat [drives] [wait [count]]
137 * This isn't mentioned in the man page, or the usage statement,
138 * but it is supported.
140 fprintf(stderr, "usage: iostat [-CdhIKoT] [-c count]"
142 "\t [-t type,if,pass] [-w wait] [drives]\n");
146 main(int argc, char **argv)
149 int tflag = 0, hflag = 0, cflag = 0, wflag = 0, nflag = 0;
150 int count = 0, waittime = 0;
151 struct devstat_match *matches;
153 int num_deletions = 0;
157 int num_devices_specified;
158 int num_selected, num_selections;
159 long select_generation;
161 char **specified_devices;
162 devstat_select_mode select_mode;
168 while ((c = getopt(argc, argv, "c:CdDhIKM:n:N:ot:Tw:")) != -1) {
172 count = atoi(optarg);
174 errx(1, "count %d is < 1", count);
196 maxshowdevs = atoi(optarg);
198 errx(1, "number of devices %d is < 0",
206 if (buildmatch(optarg, &matches,
208 errx(1, "%s", devstat_errbuf);
215 waittime = atoi(optarg);
217 errx(1, "wait time is < 1");
230 * Make sure that the userland devstat version matches the kernel
231 * devstat version. If not, exit and print a message informing
232 * the user of his mistake.
234 if (checkversion() < 0)
235 errx(1, "%s", devstat_errbuf);
238 * Figure out how many devices we should display.
244 if ((dflag > 0) && (Cflag == 0) && (Tflag == 0))
246 else if ((dflag > 0) && (Tflag > 0) && (Cflag == 0))
251 if ((dflag > 0) && (Cflag == 0))
256 if (ioctl(1, TIOCGWINSZ, &ws) >= 0 && ws.ws_col > 80)
257 maxshowdevs += (ws.ws_col - 80) / 17;
260 /* find out how many devices we have */
261 if ((num_devices = getnumdevs()) < 0)
262 err(1, "can't get number of devices");
264 if ((cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
266 err(1, "devinfo malloc failed");
267 if ((last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
269 err(1, "devinfo malloc failed");
270 bzero(cur.dinfo, sizeof(struct devinfo));
271 bzero(last.dinfo, sizeof(struct devinfo));
274 * Grab all the devices. We don't look to see if the list has
275 * changed here, since it almost certainly has. We only look for
278 if (getdevs(&cur) == -1)
279 errx(1, "%s", devstat_errbuf);
281 num_devices = cur.dinfo->numdevs;
282 generation = cur.dinfo->generation;
285 * If the user specified any devices on the command line, see if
286 * they are in the list of devices we have now.
288 if ((specified_devices = (char **)malloc(sizeof(char *))) == NULL)
289 err(1, "specified_devices malloc failed");
290 for (num_devices_specified = 0; *argv; ++argv) {
293 num_devices_specified++;
294 specified_devices = (char **)realloc(specified_devices,
296 num_devices_specified);
297 specified_devices[num_devices_specified - 1] = *argv;
300 if (nflag == 0 && maxshowdevs < num_devices_specified)
301 maxshowdevs = num_devices_specified;
305 if ((num_devices_specified == 0) && (num_matches == 0))
306 select_mode = DS_SELECT_ADD;
308 select_mode = DS_SELECT_ONLY;
311 * At this point, selectdevs will almost surely indicate that the
312 * device list has changed, so we don't look for return values of 0
313 * or 1. If we get back -1, though, there is an error.
315 if (selectdevs(&dev_select, &num_selected,
316 &num_selections, &select_generation,
317 generation, cur.dinfo->devices, num_devices,
318 matches, num_matches,
319 specified_devices, num_devices_specified,
320 select_mode, maxshowdevs, hflag) == -1) {
321 errx(1, "%s", devstat_errbuf);
325 * These devices are not usually desired
327 if (select_mode == DS_SELECT_ADD) {
328 adddeletion("md", num_selected, &deletions, &num_deletions);
329 adddeletion("pass", num_selected, &deletions, &num_deletions);
330 adddeletion("sg", num_selected, &deletions, &num_deletions);
331 if (selectdevs(&dev_select, &num_selected,
332 &num_selections, &select_generation,
333 generation, cur.dinfo->devices, num_devices,
334 matches, num_matches,
335 deletions, num_deletions,
336 DS_SELECT_REMOVE, maxshowdevs, hflag) == -1) {
337 errx(1, "%s", devstat_errbuf);
339 select_mode = DS_SELECT_ADDONLY;
343 * Look for the traditional wait time and count arguments.
346 waittime = atoi(*argv);
348 /* Let the user know he goofed, but keep going anyway */
350 warnx("discarding previous wait interval, using"
351 " %d instead", waittime);
357 warnx("discarding previous count, using %d"
365 * If the user specified a count, but not an interval, we default
366 * to an interval of 1 second.
368 if ((wflag == 0) && (cflag > 0))
372 * If the user specified a wait time, but not a count, we want to
373 * go on ad infinitum. This can be redundant if the user uses the
374 * traditional method of specifying the wait, since in that case we
375 * already set count = -1 above. Oh well.
377 if ((wflag > 0) && (cflag == 0))
380 if (kinfo_get_sched_hz(&hz))
381 err(1, "kinfo_get_sched_hz");
382 if (kinfo_get_sched_stathz(&hz))
383 err(1, "kinfo_get_sched_stathz");
386 * If the user stops the program (control-Z) and then resumes it,
387 * print out the header again.
389 signal(SIGCONT, phdr);
391 for (headercount = 1;;) {
392 struct devinfo *tmp_dinfo;
394 if (!--headercount) {
398 if (kinfo_get_tty_tk_nin(&tk_nin))
399 err(1, "kinfo_get_tty_tk_nin");
400 if (kinfo_get_tty_tk_nout(&tk_nout))
401 err(1, "kinfo_get_tty_tk_nout");
402 if (kinfo_get_sched_cputime(&cp_time))
403 err(1, "kinfo_get_sched_cputime");
405 tmp_dinfo = last.dinfo;
406 last.dinfo = cur.dinfo;
407 cur.dinfo = tmp_dinfo;
409 last.busy_time = cur.busy_time;
412 * Here what we want to do is refresh our device stats.
413 * getdevs() returns 1 when the device list has changed.
414 * If the device list has changed, we want to go through
415 * the selection process again, in case a device that we
416 * were previously displaying has gone away.
418 switch (getdevs(&cur)) {
420 errx(1, "%s", devstat_errbuf);
425 num_devices = cur.dinfo->numdevs;
426 generation = cur.dinfo->generation;
427 retval = selectdevs(&dev_select, &num_selected,
428 &num_selections, &select_generation,
429 generation, cur.dinfo->devices,
430 num_devices, matches, num_matches,
432 num_devices_specified,
433 select_mode, maxshowdevs, hflag);
436 errx(1, "%s", devstat_errbuf);
452 * We only want to re-select devices if we're in 'top'
453 * mode. This is the only mode where the devices selected
454 * could actually change.
458 retval = selectdevs(&dev_select, &num_selected,
459 &num_selections, &select_generation,
460 generation, cur.dinfo->devices,
461 num_devices, matches, num_matches,
463 num_devices_specified,
464 select_mode, maxshowdevs, hflag);
467 errx(1,"%s", devstat_errbuf);
478 diff_tk_nin = tk_nin - old_tk_nin;
480 diff_tk_nout = tk_nout - old_tk_nout;
481 old_tk_nout = tk_nout;
483 diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
484 diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
485 diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
486 diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
487 diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
488 cp_time_total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
489 diff_cp_time.cp_sys + diff_cp_time.cp_intr +
490 diff_cp_time.cp_idle;
491 old_cp_time = cp_time;
493 if (cp_time_total == 0.0)
496 if ((dflag == 0) || (Tflag > 0))
497 printf("%4.0f%5.0f", diff_tk_nin / cp_time_total * 1e6,
498 diff_tk_nout / cp_time_total * 1e6);
500 if ((dflag == 0) || (Cflag > 0))
505 if (count >= 0 && --count <= 0)
515 adddeletion(const char *prefix, int num_selected,
516 char ***deletions, int *num_deletions)
520 for (i = 0; i < num_selected; i++) {
523 if (strcmp(prefix, dev_select[i].device_name) != 0)
525 snprintf(tmpstr, sizeof(tmpstr), "%s%d",
526 dev_select[i].device_name, dev_select[i].unit_number);
528 *deletions = realloc(*deletions,
529 *num_deletions * sizeof(char *));
530 (*deletions)[*num_deletions - 1] = strdup(tmpstr);
536 phdr(__unused int signo)
541 if ((dflag == 0) || (Tflag > 0))
543 for (i = 0, printed=0;(i < num_devices) && (printed < maxshowdevs);i++){
545 if (dev_select[i].selected != 0) {
546 di = dev_select[i].position;
549 cur.dinfo->devices[di].device_name,
550 cur.dinfo->devices[di].unit_number);
554 cur.dinfo->devices[di].device_name,
555 cur.dinfo->devices[di].unit_number);
558 cur.dinfo->devices[di].device_name,
559 cur.dinfo->devices[di].unit_number);
563 if ((dflag == 0) || (Cflag > 0))
568 if ((dflag == 0) || (Tflag > 0))
571 for (i=0, printed = 0;(i < num_devices) && (printed < maxshowdevs);i++){
572 if (dev_select[i].selected != 0) {
575 printf(" sps tps msps ");
577 printf(" blk xfr msps ");
581 printf(" KB/t rtps MBr/s wtps MBw/s ");
583 printf(" KB/t tps MB/s ");
586 printf(" KB/t xfrs MB ");
591 if ((dflag == 0) || (Cflag > 0))
592 printf(" us ni sy in id\n");
599 devstats(int perf_select)
602 long double kb_per_transfer;
603 long double transfers_per_second;
604 long double transfers_per_secondr, transfers_per_secondw;
605 long double mb_per_second;
606 long double mb_per_secondr, mb_per_secondw;
607 u_int64_t total_bytes, total_transfers, total_blocks;
608 long double busy_seconds;
609 long double total_mb;
610 long double blocks_per_second, ms_per_transaction;
613 * Calculate elapsed time up front, since it's the same for all
616 busy_seconds = compute_etime(cur.busy_time, last.busy_time);
618 for (dn = 0; dn < num_devices; dn++) {
621 if (perf_select == 0 && dev_select[dn].selected == 0)
624 di = dev_select[dn].position;
626 if (compute_stats(&cur.dinfo->devices[di],
627 &last.dinfo->devices[di], busy_seconds,
628 &total_bytes, &total_transfers,
629 &total_blocks, &kb_per_transfer,
630 &transfers_per_second, &mb_per_second,
631 &blocks_per_second, &ms_per_transaction)!= 0)
632 errx(1, "%s", devstat_errbuf);
633 if (compute_stats_read(&cur.dinfo->devices[di],
634 &last.dinfo->devices[di], busy_seconds,
637 &transfers_per_secondr, &mb_per_secondr,
639 errx(1, "%s", devstat_errbuf);
640 if (compute_stats_write(&cur.dinfo->devices[di],
641 &last.dinfo->devices[di], busy_seconds,
644 &transfers_per_secondw, &mb_per_secondw,
646 errx(1, "%s", devstat_errbuf);
648 if (perf_select != 0) {
649 dev_select[dn].bytes = total_bytes;
650 if (dev_select[dn].selected == 0)
655 int block_size = cur.dinfo->devices[di].block_size;
656 total_blocks = total_blocks * (block_size ?
657 block_size : 512) / 1024;
661 int msdig = (ms_per_transaction < 100.0) ? 1 : 0;
664 printf("%4.0Lf%4.0Lf%5.*Lf ",
666 transfers_per_second,
670 printf("%4.1ju%4.1ju%5.*Lf ",
671 (uintmax_t)total_blocks,
672 (uintmax_t)total_transfers,
678 printf(" %5.2Lf %4.0Lf %6.2Lf %4.0Lf %6.2Lf ",
680 transfers_per_secondr,
682 transfers_per_secondw,
685 printf(" %5.2Lf %4.0Lf %5.2Lf ",
687 transfers_per_second,
691 total_mb = total_bytes;
692 total_mb /= 1024 * 1024;
694 printf(" %5.2Lf %3.1ju %5.2Lf ",
696 (uintmax_t)total_transfers,
706 if (cp_time_total == 0.0)
709 printf(" %2.0f", 100. * diff_cp_time.cp_user / cp_time_total);
710 printf(" %2.0f", 100. * diff_cp_time.cp_nice / cp_time_total);
711 printf(" %2.0f", 100. * diff_cp_time.cp_sys / cp_time_total);
712 printf(" %2.0f", 100. * diff_cp_time.cp_intr / cp_time_total);
713 printf(" %2.0f", 100. * diff_cp_time.cp_idle / cp_time_total);