2 * Copyright (c) 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
29 * Copyright (c) 1980, 1992, 1993
30 * The Regents of the University of California. All rights reserved.
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
35 * 1. Redistributions of source code must retain the above copyright
36 * notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 * notice, this list of conditions and the following disclaimer in the
39 * documentation and/or other materials provided with the distribution.
40 * 3. All advertising materials mentioning features or use of this software
41 * must display the following acknowledgement:
42 * This product includes software developed by the University of
43 * California, Berkeley and its contributors.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 #include <sys/cdefs.h>
63 __FBSDID("$FreeBSD$");
66 static const char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93";
69 #include <sys/param.h>
70 #include <sys/sysctl.h>
71 #include <sys/resource.h>
84 struct statinfo cur, last;
86 static int linesperregion;
88 static int numbers = 0; /* default display bar graphs */
89 static int kbpt = 0; /* default ms/seek shown */
91 static int barlabels(int);
92 static void histogram(long double, int, double);
93 static int numlabels(int);
94 static int devstats(int, int, int);
95 static void stat1(int, int);
100 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
104 closeiostat(WINDOW *w)
116 if ((num_devices = devstat_getnumdevs(NULL)) < 0)
119 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
120 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
121 bzero(cur.dinfo, sizeof(struct devinfo));
122 bzero(last.dinfo, sizeof(struct devinfo));
125 * This value for maxshowdevs (100) is bogus. I'm not sure exactly
126 * how to calculate it, though.
128 if (dsinit(100, &cur, &last, NULL) != 1)
137 struct devinfo *tmp_dinfo;
140 len = sizeof(cur.cp_time);
141 if (sysctlbyname("kern.cp_time", &cur.cp_time, &len, NULL, 0)
142 || len != sizeof(cur.cp_time)) {
143 perror("kern.cp_time");
146 tmp_dinfo = last.dinfo;
147 last.dinfo = cur.dinfo;
148 cur.dinfo = tmp_dinfo;
150 last.snap_time = cur.snap_time;
153 * Here what we want to do is refresh our device stats.
154 * getdevs() returns 1 when the device list has changed.
155 * If the device list has changed, we want to go through
156 * the selection process again, in case a device that we
157 * were previously displaying has gone away.
159 switch (devstat_getdevs(NULL, &cur)) {
161 errx(1, "%s", devstat_errbuf);
164 cmdiostat("refresh", NULL);
169 num_devices = cur.dinfo->numdevs;
170 generation = cur.dinfo->generation;
182 wmove(wnd, row, 0); wclrtobot(wnd);
183 mvwaddstr(wnd, row++, INSET,
184 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
185 mvwaddstr(wnd, row++, 0, "cpu user|");
186 mvwaddstr(wnd, row++, 0, " nice|");
187 mvwaddstr(wnd, row++, 0, " system|");
188 mvwaddstr(wnd, row++, 0, "interrupt|");
189 mvwaddstr(wnd, row++, 0, " idle|");
191 row = numlabels(row + 1);
193 row = barlabels(row + 1);
199 int i, _col, regions, ndrives;
203 #define DRIVESPERLINE ((wnd->_maxx - INSET) / COLWIDTH)
204 for (ndrives = 0, i = 0; i < num_devices; i++)
205 if (dev_select[i].selected)
207 regions = howmany(ndrives, DRIVESPERLINE);
209 * Deduct -regions for blank line after each scrolling region.
211 linesperregion = (wnd->_maxy - row - regions) / regions;
213 * Minimum region contains space for two
214 * label lines and one line of statistics.
216 if (linesperregion < 3)
219 for (i = 0; i < num_devices; i++)
220 if (dev_select[i].selected) {
221 if (_col + COLWIDTH >= wnd->_maxx - INSET) {
222 _col = INSET, row += linesperregion + 1;
223 if (row > wnd->_maxy - (linesperregion + 1))
226 sprintf(tmpstr, "%s%d", dev_select[i].device_name,
227 dev_select[i].unit_number);
228 mvwaddstr(wnd, row, _col + 4, tmpstr);
229 mvwaddstr(wnd, row + 1, _col, " KB/t tps MB/s ");
233 row += linesperregion + 1;
243 mvwaddstr(wnd, row++, INSET,
244 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
245 linesperregion = 2 + kbpt;
246 for (i = 0; i < num_devices; i++)
247 if (dev_select[i].selected) {
248 if (row > wnd->_maxy - linesperregion)
250 sprintf(tmpstr, "%s%d", dev_select[i].device_name,
251 dev_select[i].unit_number);
252 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|",
254 mvwaddstr(wnd, row++, 0, " tps|");
256 mvwaddstr(wnd, row++, 0, " KB/t|");
268 #define X(fld) t = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = t
270 for(i = 0; i < CPUSTATES; i++) {
272 etime += cur.cp_time[i];
278 for (i = 0; i < CPUSTATES; i++)
282 for (i = 0; i < num_devices; i++)
283 if (dev_select[i].selected) {
284 if (row > wnd->_maxy - linesperregion)
286 row = devstats(row, INSET, i);
291 wmove(wnd, row + linesperregion, 0);
293 wmove(wnd, row + 3, 0);
295 for (i = 0; i < num_devices; i++)
296 if (dev_select[i].selected) {
297 if (_col + COLWIDTH >= wnd->_maxx - INSET) {
298 _col = INSET, row += linesperregion + 1;
299 if (row > wnd->_maxy - (linesperregion + 1))
301 wmove(wnd, row + linesperregion, 0);
303 wmove(wnd, row + 3, 0);
306 (void) devstats(row + 3, _col, i);
312 devstats(int row, int _col, int dn)
314 long double transfers_per_second;
315 long double kb_per_transfer, mb_per_second;
316 long double busy_seconds;
319 di = dev_select[dn].position;
321 busy_seconds = cur.snap_time - last.snap_time;
323 if (devstat_compute_statistics(&cur.dinfo->devices[di],
324 &last.dinfo->devices[di], busy_seconds,
325 DSM_KB_PER_TRANSFER, &kb_per_transfer,
326 DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
327 DSM_MB_PER_SECOND, &mb_per_second, DSM_NONE) != 0)
328 errx(1, "%s", devstat_errbuf);
331 mvwprintw(wnd, row, _col, " %5.2Lf %3.0Lf %5.2Lf ",
332 kb_per_transfer, transfers_per_second,
336 wmove(wnd, row++, _col);
337 histogram(mb_per_second, 50, .5);
338 wmove(wnd, row++, _col);
339 histogram(transfers_per_second, 50, .5);
341 wmove(wnd, row++, _col);
342 histogram(kb_per_transfer, 50, .5);
350 stat1(int row, int o)
356 for (i = 0; i < CPUSTATES; i++)
357 dtime += cur.cp_time[i];
360 wmove(wnd, row, INSET);
362 histogram(100.0 * cur.cp_time[o] / dtime, 50, CPUSCALE);
366 histogram(long double val, int colwidth, double scale)
370 int v = (int)(val * scale) + 0.5;
372 k = MIN(v, colwidth);
374 snprintf(buf, sizeof(buf), "%5.2Lf", val);
387 cmdiostat(const char *cmd, const char *args)
390 if (prefix(cmd, "kbpt"))
392 else if (prefix(cmd, "numbers"))
394 else if (prefix(cmd, "bars"))
396 else if (!dscmd(cmd, args, 100, &cur))