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 $
29 * $DragonFly: src/usr.sbin/iostat/iostat.c,v 1.7 2005/09/01 19:08:38 swildner Exp $
32 * Parts of this program are derived from the original FreeBSD iostat
36 * Copyright (c) 1986, 1991, 1993
37 * The Regents of the University of California. All rights reserved.
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. All advertising materials mentioning features or use of this software
48 * must display the following acknowledgement:
49 * This product includes software developed by the University of
50 * California, Berkeley and its contributors.
51 * 4. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * Ideas for the new iostat statistics output modes taken from the NetBSD
72 * Copyright (c) 1996 John M. Vinopal
73 * All rights reserved.
75 * Redistribution and use in source and binary forms, with or without
76 * modification, are permitted provided that the following conditions
78 * 1. Redistributions of source code must retain the above copyright
79 * notice, this list of conditions and the following disclaimer.
80 * 2. Redistributions in binary form must reproduce the above copyright
81 * notice, this list of conditions and the following disclaimer in the
82 * documentation and/or other materials provided with the distribution.
83 * 3. All advertising materials mentioning features or use of this software
84 * must display the following acknowledgement:
85 * This product includes software developed for the NetBSD Project
87 * 4. The name of the author may not be used to endorse or promote products
88 * derived from this software without specific prior written permission.
90 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
91 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
92 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
93 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
94 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
95 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
96 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
97 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
98 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
99 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
103 #include <sys/user.h>
104 #include <sys/param.h>
105 #include <sys/errno.h>
118 struct statinfo cur, last;
119 uint64_t tk_nin, old_tk_nin, diff_tk_nin;
120 uint64_t tk_nout, old_tk_nout, diff_tk_nout;
121 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
122 double cp_time_total;
124 struct device_selection *dev_select;
126 int dflag = 0, Dflag=0, Iflag = 0, Cflag = 0, Tflag = 0, oflag = 0, Kflag = 0;
128 /* local function declarations */
129 static void usage(void);
130 static void phdr(int signo);
131 static void devstats(int perf_select);
132 static void cpustats(void);
138 * We also support the following 'traditional' syntax:
139 * iostat [drives] [wait [count]]
140 * This isn't mentioned in the man page, or the usage statement,
141 * but it is supported.
143 fprintf(stderr, "usage: iostat [-CdhIKoT] [-c count]"
145 "\t [-t type,if,pass] [-w wait] [drives]\n");
149 main(int argc, char **argv)
152 int tflag = 0, hflag = 0, cflag = 0, wflag = 0, nflag = 0;
153 int count = 0, waittime = 0;
154 struct devstat_match *matches;
159 int num_devices_specified;
160 int num_selected, num_selections;
161 long select_generation;
162 char **specified_devices;
163 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.
242 if ((dflag > 0) && (Cflag == 0) && (Tflag == 0))
244 else if ((dflag > 0) && (Tflag > 0) && (Cflag == 0))
249 if ((dflag > 0) && (Cflag == 0))
256 /* find out how many devices we have */
257 if ((num_devices = getnumdevs()) < 0)
258 err(1, "can't get number of devices");
260 if ((cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
262 err(1, "devinfo malloc failed");
263 if ((last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
265 err(1, "devinfo malloc failed");
266 bzero(cur.dinfo, sizeof(struct devinfo));
267 bzero(last.dinfo, sizeof(struct devinfo));
270 * Grab all the devices. We don't look to see if the list has
271 * changed here, since it almost certainly has. We only look for
274 if (getdevs(&cur) == -1)
275 errx(1, "%s", devstat_errbuf);
277 num_devices = cur.dinfo->numdevs;
278 generation = cur.dinfo->generation;
281 * If the user specified any devices on the command line, see if
282 * they are in the list of devices we have now.
284 if ((specified_devices = (char **)malloc(sizeof(char *))) == NULL)
285 err(1, "specified_devices malloc failed");
286 for (num_devices_specified = 0; *argv; ++argv) {
289 num_devices_specified++;
290 specified_devices = (char **)realloc(specified_devices,
292 num_devices_specified);
293 specified_devices[num_devices_specified - 1] = *argv;
296 if (nflag == 0 && maxshowdevs < num_devices_specified)
297 maxshowdevs = num_devices_specified;
301 if ((num_devices_specified == 0) && (num_matches == 0))
302 select_mode = DS_SELECT_ADD;
304 select_mode = DS_SELECT_ONLY;
307 * At this point, selectdevs will almost surely indicate that the
308 * device list has changed, so we don't look for return values of 0
309 * or 1. If we get back -1, though, there is an error.
311 if (selectdevs(&dev_select, &num_selected,
312 &num_selections, &select_generation,
313 generation, cur.dinfo->devices, num_devices,
314 matches, num_matches,
315 specified_devices, num_devices_specified,
316 select_mode, maxshowdevs, hflag) == -1)
317 errx(1, "%s", devstat_errbuf);
320 * Look for the traditional wait time and count arguments.
323 waittime = atoi(*argv);
325 /* Let the user know he goofed, but keep going anyway */
327 warnx("discarding previous wait interval, using"
328 " %d instead", waittime);
334 warnx("discarding previous count, using %d"
342 * If the user specified a count, but not an interval, we default
343 * to an interval of 1 second.
345 if ((wflag == 0) && (cflag > 0))
349 * If the user specified a wait time, but not a count, we want to
350 * go on ad infinitum. This can be redundant if the user uses the
351 * traditional method of specifying the wait, since in that case we
352 * already set count = -1 above. Oh well.
354 if ((wflag > 0) && (cflag == 0))
357 if (kinfo_get_sched_hz(&hz))
358 err(1, "kinfo_get_sched_hz");
359 if (kinfo_get_sched_stathz(&hz))
360 err(1, "kinfo_get_sched_stathz");
363 * If the user stops the program (control-Z) and then resumes it,
364 * print out the header again.
366 signal(SIGCONT, phdr);
368 for (headercount = 1;;) {
369 struct devinfo *tmp_dinfo;
371 if (!--headercount) {
375 if (kinfo_get_tty_tk_nin(&tk_nin))
376 err(1, "kinfo_get_tty_tk_nin");
377 if (kinfo_get_tty_tk_nout(&tk_nout))
378 err(1, "kinfo_get_tty_tk_nout");
379 if (kinfo_get_sched_cputime(&cp_time))
380 err(1, "kinfo_get_sched_cputime");
382 tmp_dinfo = last.dinfo;
383 last.dinfo = cur.dinfo;
384 cur.dinfo = tmp_dinfo;
386 last.busy_time = cur.busy_time;
389 * Here what we want to do is refresh our device stats.
390 * getdevs() returns 1 when the device list has changed.
391 * If the device list has changed, we want to go through
392 * the selection process again, in case a device that we
393 * were previously displaying has gone away.
395 switch (getdevs(&cur)) {
397 errx(1, "%s", devstat_errbuf);
402 num_devices = cur.dinfo->numdevs;
403 generation = cur.dinfo->generation;
404 retval = selectdevs(&dev_select, &num_selected,
405 &num_selections, &select_generation,
406 generation, cur.dinfo->devices,
407 num_devices, matches, num_matches,
409 num_devices_specified,
410 select_mode, maxshowdevs, hflag);
413 errx(1, "%s", devstat_errbuf);
429 * We only want to re-select devices if we're in 'top'
430 * mode. This is the only mode where the devices selected
431 * could actually change.
435 retval = selectdevs(&dev_select, &num_selected,
436 &num_selections, &select_generation,
437 generation, cur.dinfo->devices,
438 num_devices, matches, num_matches,
440 num_devices_specified,
441 select_mode, maxshowdevs, hflag);
444 errx(1,"%s", devstat_errbuf);
455 diff_tk_nin = tk_nin - old_tk_nin;
457 diff_tk_nout = tk_nout - old_tk_nout;
458 old_tk_nout = tk_nout;
460 diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
461 diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
462 diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
463 diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
464 diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
465 cp_time_total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
466 diff_cp_time.cp_sys + diff_cp_time.cp_intr +
467 diff_cp_time.cp_idle;
468 old_cp_time = cp_time;
470 if (cp_time_total == 0.0)
473 if ((dflag == 0) || (Tflag > 0))
474 printf("%4.0f%5.0f", diff_tk_nin / cp_time_total * 1e6,
475 diff_tk_nout / cp_time_total * 1e6);
477 if ((dflag == 0) || (Cflag > 0))
482 if (count >= 0 && --count <= 0)
492 phdr(__unused int signo)
497 if ((dflag == 0) || (Tflag > 0))
499 for (i = 0, printed=0;(i < num_devices) && (printed < maxshowdevs);i++){
501 if ((dev_select[i].selected != 0)
502 && (dev_select[i].selected <= maxshowdevs)) {
503 di = dev_select[i].position;
506 cur.dinfo->devices[di].device_name,
507 cur.dinfo->devices[di].unit_number);
511 cur.dinfo->devices[di].device_name,
512 cur.dinfo->devices[di].unit_number);
515 cur.dinfo->devices[di].device_name,
516 cur.dinfo->devices[di].unit_number);
520 if ((dflag == 0) || (Cflag > 0))
525 if ((dflag == 0) || (Tflag > 0))
528 for (i=0, printed = 0;(i < num_devices) && (printed < maxshowdevs);i++){
529 if ((dev_select[i].selected != 0)
530 && (dev_select[i].selected <= maxshowdevs)) {
533 printf(" sps tps msps ");
535 printf(" blk xfr msps ");
539 printf(" KB/t rtps MBr/s wtps MBw/s ");
541 printf(" KB/t tps MB/s ");
544 printf(" KB/t xfrs MB ");
549 if ((dflag == 0) || (Cflag > 0))
550 printf(" us ni sy in id\n");
557 devstats(int perf_select)
560 long double kb_per_transfer;
561 long double transfers_per_second;
562 long double transfers_per_secondr, transfers_per_secondw;
563 long double mb_per_second;
564 long double mb_per_secondr, mb_per_secondw;
565 u_int64_t total_bytes, total_transfers, total_blocks;
566 long double busy_seconds;
567 long double total_mb;
568 long double blocks_per_second, ms_per_transaction;
571 * Calculate elapsed time up front, since it's the same for all
574 busy_seconds = compute_etime(cur.busy_time, last.busy_time);
576 for (dn = 0; dn < num_devices; dn++) {
579 if (((perf_select == 0) && (dev_select[dn].selected == 0))
580 || (dev_select[dn].selected > maxshowdevs))
583 di = dev_select[dn].position;
585 if (compute_stats(&cur.dinfo->devices[di],
586 &last.dinfo->devices[di], busy_seconds,
587 &total_bytes, &total_transfers,
588 &total_blocks, &kb_per_transfer,
589 &transfers_per_second, &mb_per_second,
590 &blocks_per_second, &ms_per_transaction)!= 0)
591 errx(1, "%s", devstat_errbuf);
592 if (compute_stats_read(&cur.dinfo->devices[di],
593 &last.dinfo->devices[di], busy_seconds,
596 &transfers_per_secondr, &mb_per_secondr,
598 errx(1, "%s", devstat_errbuf);
599 if (compute_stats_write(&cur.dinfo->devices[di],
600 &last.dinfo->devices[di], busy_seconds,
603 &transfers_per_secondw, &mb_per_secondw,
605 errx(1, "%s", devstat_errbuf);
607 if (perf_select != 0) {
608 dev_select[dn].bytes = total_bytes;
609 if ((dev_select[dn].selected == 0)
610 || (dev_select[dn].selected > maxshowdevs))
615 int block_size = cur.dinfo->devices[di].block_size;
616 total_blocks = total_blocks * (block_size ?
617 block_size : 512) / 1024;
621 int msdig = (ms_per_transaction < 100.0) ? 1 : 0;
624 printf("%4.0Lf%4.0Lf%5.*Lf ",
626 transfers_per_second,
630 printf("%4.1ju%4.1ju%5.*Lf ",
631 (uintmax_t)total_blocks,
632 (uintmax_t)total_transfers,
638 printf(" %5.2Lf %4.0Lf %6.2Lf %4.0Lf %6.2Lf ",
640 transfers_per_secondr,
642 transfers_per_secondw,
645 printf(" %5.2Lf %4.0Lf %5.2Lf ",
647 transfers_per_second,
651 total_mb = total_bytes;
652 total_mb /= 1024 * 1024;
654 printf(" %5.2Lf %3.1ju %5.2Lf ",
656 (uintmax_t)total_transfers,
666 if (cp_time_total == 0.0)
669 printf(" %2.0f", 100. * diff_cp_time.cp_user / cp_time_total);
670 printf(" %2.0f", 100. * diff_cp_time.cp_nice / cp_time_total);
671 printf(" %2.0f", 100. * diff_cp_time.cp_sys / cp_time_total);
672 printf(" %2.0f", 100. * diff_cp_time.cp_intr / cp_time_total);
673 printf(" %2.0f", 100. * diff_cp_time.cp_idle / cp_time_total);