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/param.h>
104 #include <sys/errno.h>
117 struct statinfo cur, last;
118 uint64_t tk_nin, old_tk_nin, diff_tk_nin;
119 uint64_t tk_nout, old_tk_nout, diff_tk_nout;
120 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
121 double cp_time_total;
123 struct device_selection *dev_select;
125 int dflag = 0, Iflag = 0, Cflag = 0, Tflag = 0, oflag = 0, Kflag = 0;
127 /* local function declarations */
128 static void usage(void);
129 static void phdr(int signo);
130 static void devstats(int perf_select);
131 static void cpustats(void);
137 * We also support the following 'traditional' syntax:
138 * iostat [drives] [wait [count]]
139 * This isn't mentioned in the man page, or the usage statement,
140 * but it is supported.
142 fprintf(stderr, "usage: iostat [-CdhIKoT] [-c count]"
144 "\t [-t type,if,pass] [-w wait] [drives]\n");
148 main(int argc, char **argv)
151 int tflag = 0, hflag = 0, cflag = 0, wflag = 0, nflag = 0;
152 int count = 0, waittime = 0;
153 struct devstat_match *matches;
158 int num_devices_specified;
159 int num_selected, num_selections;
160 long select_generation;
161 char **specified_devices;
162 devstat_select_mode select_mode;
167 while ((c = getopt(argc, argv, "c:CdhIKM:n:N:ot:Tw:")) != -1) {
171 count = atoi(optarg);
173 errx(1, "count %d is < 1", count);
192 maxshowdevs = atoi(optarg);
194 errx(1, "number of devices %d is < 0",
202 if (buildmatch(optarg, &matches,
204 errx(1, "%s", devstat_errbuf);
211 waittime = atoi(optarg);
213 errx(1, "wait time is < 1");
226 * Make sure that the userland devstat version matches the kernel
227 * devstat version. If not, exit and print a message informing
228 * the user of his mistake.
230 if (checkversion() < 0)
231 errx(1, "%s", devstat_errbuf);
234 * Figure out how many devices we should display.
238 if ((dflag > 0) && (Cflag == 0) && (Tflag == 0))
240 else if ((dflag > 0) && (Tflag > 0) && (Cflag == 0))
245 if ((dflag > 0) && (Cflag == 0))
252 /* find out how many devices we have */
253 if ((num_devices = getnumdevs()) < 0)
254 err(1, "can't get number of devices");
256 if ((cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
258 err(1, "devinfo malloc failed");
259 if ((last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
261 err(1, "devinfo malloc failed");
262 bzero(cur.dinfo, sizeof(struct devinfo));
263 bzero(last.dinfo, sizeof(struct devinfo));
266 * Grab all the devices. We don't look to see if the list has
267 * changed here, since it almost certainly has. We only look for
270 if (getdevs(&cur) == -1)
271 errx(1, "%s", devstat_errbuf);
273 num_devices = cur.dinfo->numdevs;
274 generation = cur.dinfo->generation;
277 * If the user specified any devices on the command line, see if
278 * they are in the list of devices we have now.
280 if ((specified_devices = (char **)malloc(sizeof(char *))) == NULL)
281 err(1, "specified_devices malloc failed");
282 for (num_devices_specified = 0; *argv; ++argv) {
285 num_devices_specified++;
286 specified_devices = (char **)realloc(specified_devices,
288 num_devices_specified);
289 specified_devices[num_devices_specified - 1] = *argv;
292 if (nflag == 0 && maxshowdevs < num_devices_specified)
293 maxshowdevs = num_devices_specified;
297 if ((num_devices_specified == 0) && (num_matches == 0))
298 select_mode = DS_SELECT_ADD;
300 select_mode = DS_SELECT_ONLY;
303 * At this point, selectdevs will almost surely indicate that the
304 * device list has changed, so we don't look for return values of 0
305 * or 1. If we get back -1, though, there is an error.
307 if (selectdevs(&dev_select, &num_selected,
308 &num_selections, &select_generation,
309 generation, cur.dinfo->devices, num_devices,
310 matches, num_matches,
311 specified_devices, num_devices_specified,
312 select_mode, maxshowdevs, hflag) == -1)
313 errx(1, "%s", devstat_errbuf);
316 * Look for the traditional wait time and count arguments.
319 waittime = atoi(*argv);
321 /* Let the user know he goofed, but keep going anyway */
323 warnx("discarding previous wait interval, using"
324 " %d instead", waittime);
330 warnx("discarding previous count, using %d"
338 * If the user specified a count, but not an interval, we default
339 * to an interval of 1 second.
341 if ((wflag == 0) && (cflag > 0))
345 * If the user specified a wait time, but not a count, we want to
346 * go on ad infinitum. This can be redundant if the user uses the
347 * traditional method of specifying the wait, since in that case we
348 * already set count = -1 above. Oh well.
350 if ((wflag > 0) && (cflag == 0))
353 if (kinfo_get_sched_hz(&hz))
354 err(1, "kinfo_get_sched_hz");
355 if (kinfo_get_sched_stathz(&hz))
356 err(1, "kinfo_get_sched_stathz");
359 * If the user stops the program (control-Z) and then resumes it,
360 * print out the header again.
362 signal(SIGCONT, phdr);
364 for (headercount = 1;;) {
365 struct devinfo *tmp_dinfo;
367 if (!--headercount) {
371 if (kinfo_get_tty_tk_nin(&tk_nin))
372 err(1, "kinfo_get_tty_tk_nin");
373 if (kinfo_get_tty_tk_nout(&tk_nout))
374 err(1, "kinfo_get_tty_tk_nout");
375 if (kinfo_get_sched_cputime(&cp_time))
376 err(1, "kinfo_get_sched_cputime");
378 tmp_dinfo = last.dinfo;
379 last.dinfo = cur.dinfo;
380 cur.dinfo = tmp_dinfo;
382 last.busy_time = cur.busy_time;
385 * Here what we want to do is refresh our device stats.
386 * getdevs() returns 1 when the device list has changed.
387 * If the device list has changed, we want to go through
388 * the selection process again, in case a device that we
389 * were previously displaying has gone away.
391 switch (getdevs(&cur)) {
393 errx(1, "%s", devstat_errbuf);
398 num_devices = cur.dinfo->numdevs;
399 generation = cur.dinfo->generation;
400 retval = selectdevs(&dev_select, &num_selected,
401 &num_selections, &select_generation,
402 generation, cur.dinfo->devices,
403 num_devices, matches, num_matches,
405 num_devices_specified,
406 select_mode, maxshowdevs, hflag);
409 errx(1, "%s", devstat_errbuf);
425 * We only want to re-select devices if we're in 'top'
426 * mode. This is the only mode where the devices selected
427 * could actually change.
431 retval = selectdevs(&dev_select, &num_selected,
432 &num_selections, &select_generation,
433 generation, cur.dinfo->devices,
434 num_devices, matches, num_matches,
436 num_devices_specified,
437 select_mode, maxshowdevs, hflag);
440 errx(1,"%s", devstat_errbuf);
451 diff_tk_nin = tk_nin - old_tk_nin;
453 diff_tk_nout = tk_nout - old_tk_nout;
454 old_tk_nout = tk_nout;
456 diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
457 diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
458 diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
459 diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
460 diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
461 cp_time_total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
462 diff_cp_time.cp_sys + diff_cp_time.cp_intr +
463 diff_cp_time.cp_idle;
464 old_cp_time = cp_time;
466 if (cp_time_total == 0.0)
469 if ((dflag == 0) || (Tflag > 0))
470 printf("%4.0f%5.0f", diff_tk_nin / cp_time_total * 1e6,
471 diff_tk_nout / cp_time_total * 1e6);
473 if ((dflag == 0) || (Cflag > 0))
478 if (count >= 0 && --count <= 0)
488 phdr(__unused int signo)
493 if ((dflag == 0) || (Tflag > 0))
495 for (i = 0, printed=0;(i < num_devices) && (printed < maxshowdevs);i++){
497 if ((dev_select[i].selected != 0)
498 && (dev_select[i].selected <= maxshowdevs)) {
499 di = dev_select[i].position;
502 cur.dinfo->devices[di].device_name,
503 cur.dinfo->devices[di].unit_number);
506 cur.dinfo->devices[di].device_name,
507 cur.dinfo->devices[di].unit_number);
511 if ((dflag == 0) || (Cflag > 0))
516 if ((dflag == 0) || (Tflag > 0))
519 for (i=0, printed = 0;(i < num_devices) && (printed < maxshowdevs);i++){
520 if ((dev_select[i].selected != 0)
521 && (dev_select[i].selected <= maxshowdevs)) {
524 printf(" sps tps msps ");
526 printf(" blk xfr msps ");
529 printf(" KB/t tps MB/s ");
531 printf(" KB/t xfrs MB ");
536 if ((dflag == 0) || (Cflag > 0))
537 printf(" us ni sy in id\n");
544 devstats(int perf_select)
547 long double transfers_per_second;
548 long double kb_per_transfer, mb_per_second;
549 u_int64_t total_bytes, total_transfers, total_blocks;
550 long double busy_seconds;
551 long double total_mb;
552 long double blocks_per_second, ms_per_transaction;
555 * Calculate elapsed time up front, since it's the same for all
558 busy_seconds = compute_etime(cur.busy_time, last.busy_time);
560 for (dn = 0; dn < num_devices; dn++) {
563 if (((perf_select == 0) && (dev_select[dn].selected == 0))
564 || (dev_select[dn].selected > maxshowdevs))
567 di = dev_select[dn].position;
569 if (compute_stats(&cur.dinfo->devices[di],
570 &last.dinfo->devices[di], busy_seconds,
571 &total_bytes, &total_transfers,
572 &total_blocks, &kb_per_transfer,
573 &transfers_per_second, &mb_per_second,
574 &blocks_per_second, &ms_per_transaction)!= 0)
575 errx(1, "%s", devstat_errbuf);
577 if (perf_select != 0) {
578 dev_select[dn].bytes = total_bytes;
579 if ((dev_select[dn].selected == 0)
580 || (dev_select[dn].selected > maxshowdevs))
585 int block_size = cur.dinfo->devices[di].block_size;
586 total_blocks = total_blocks * (block_size ?
587 block_size : 512) / 1024;
591 int msdig = (ms_per_transaction < 100.0) ? 1 : 0;
594 printf("%4.0Lf%4.0Lf%5.*Lf ",
596 transfers_per_second,
600 printf("%4.1qu%4.1qu%5.*Lf ",
607 printf(" %5.2Lf %4.0Lf %5.2Lf ",
609 transfers_per_second,
612 total_mb = total_bytes;
613 total_mb /= 1024 * 1024;
615 printf(" %5.2Lf %3.1qu %5.2Lf ",
627 if (cp_time_total == 0.0)
630 printf(" %2.0f", 100. * diff_cp_time.cp_user / cp_time_total);
631 printf(" %2.0f", 100. * diff_cp_time.cp_nice / cp_time_total);
632 printf(" %2.0f", 100. * diff_cp_time.cp_sys / cp_time_total);
633 printf(" %2.0f", 100. * diff_cp_time.cp_intr / cp_time_total);
634 printf(" %2.0f", 100. * diff_cp_time.cp_idle / cp_time_total);