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
28 * $FreeBSD: src/usr.bin/systat/iostat.c,v 1.9.2.1 2000/07/02 10:03:17 ps Exp $
29 * $DragonFly: src/usr.bin/systat/iostat.c,v 1.3 2003/10/04 20:36:51 hmp Exp $
31 * @(#)iostat.c 8.1 (Berkeley) 6/6/93
34 * Copyright (c) 1980, 1992, 1993
35 * The Regents of the University of California. All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66 #include <sys/param.h>
67 #include <sys/dkstat.h>
79 static struct nlist namelist[] = {
83 #define X_MBDINIT (X_CP_TIME+1)
85 #define X_UBDINIT (X_CP_TIME+2)
89 #define X_VBDINIT (X_CP_TIME+1)
95 struct statinfo cur, last;
97 static int linesperregion;
99 static int numbers = 0; /* default display bar graphs */
100 static int kbpt = 0; /* default ms/seek shown */
102 static int barlabels(int);
103 static void histogram(long double, int, double);
104 static int numlabels(int);
105 static int devstats(int, int, int);
106 static void stat1(int, int);
111 return (subwin(stdscr, LINES-1-5, 0, 5, 0));
115 closeiostat(WINDOW *w)
127 if (num_devices = getnumdevs() < 0)
130 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
131 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
132 bzero(cur.dinfo, sizeof(struct devinfo));
133 bzero(last.dinfo, sizeof(struct devinfo));
136 * This value for maxshowdevs (100) is bogus. I'm not sure exactly
137 * how to calculate it, though.
139 if (dsinit(100, &cur, &last, NULL) != 1)
142 if (kvm_nlist(kd, namelist)) {
153 struct devinfo *tmp_dinfo;
155 NREAD(X_CP_TIME, cur.cp_time, sizeof(cur.cp_time));
156 tmp_dinfo = last.dinfo;
157 last.dinfo = cur.dinfo;
158 cur.dinfo = tmp_dinfo;
160 last.busy_time = cur.busy_time;
163 * Here what we want to do is refresh our device stats.
164 * getdevs() returns 1 when the device list has changed.
165 * If the device list has changed, we want to go through
166 * the selection process again, in case a device that we
167 * were previously displaying has gone away.
169 switch (getdevs(&cur)) {
171 errx(1, "%s", devstat_errbuf);
174 cmdiostat("refresh", NULL);
179 num_devices = cur.dinfo->numdevs;
180 generation = cur.dinfo->generation;
192 wmove(wnd, row, 0); wclrtobot(wnd);
193 mvwaddstr(wnd, row++, INSET,
194 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
195 mvwaddstr(wnd, row++, 0, "cpu user|");
196 mvwaddstr(wnd, row++, 0, " nice|");
197 mvwaddstr(wnd, row++, 0, " system|");
198 mvwaddstr(wnd, row++, 0, "interrupt|");
199 mvwaddstr(wnd, row++, 0, " idle|");
201 row = numlabels(row + 1);
203 row = barlabels(row + 1);
209 int i, col, regions, ndrives;
213 #define DRIVESPERLINE ((wnd->_maxx - INSET) / COLWIDTH)
214 for (ndrives = 0, i = 0; i < num_devices; i++)
215 if (dev_select[i].selected)
217 regions = howmany(ndrives, DRIVESPERLINE);
219 * Deduct -regions for blank line after each scrolling region.
221 linesperregion = (wnd->_maxy - row - regions) / regions;
223 * Minimum region contains space for two
224 * label lines and one line of statistics.
226 if (linesperregion < 3)
229 for (i = 0; i < num_devices; i++)
230 if (dev_select[i].selected) {
231 if (col + COLWIDTH >= wnd->_maxx - INSET) {
232 col = INSET, row += linesperregion + 1;
233 if (row > wnd->_maxy - (linesperregion + 1))
236 sprintf(tmpstr, "%s%d", dev_select[i].device_name,
237 dev_select[i].unit_number);
238 mvwaddstr(wnd, row, col + 4, tmpstr);
239 mvwaddstr(wnd, row + 1, col, " KB/t tps MB/s ");
243 row += linesperregion + 1;
253 mvwaddstr(wnd, row++, INSET,
254 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
255 linesperregion = 2 + kbpt;
256 for (i = 0; i < num_devices; i++)
257 if (dev_select[i].selected) {
258 if (row > wnd->_maxy - linesperregion)
260 sprintf(tmpstr, "%s%d", dev_select[i].device_name,
261 dev_select[i].unit_number);
262 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|",
264 mvwaddstr(wnd, row++, 0, " tps|");
266 mvwaddstr(wnd, row++, 0, " KB/t|");
276 register int i, row, col;
278 #define X(fld) t = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = t
280 for(i = 0; i < CPUSTATES; i++) {
282 etime += cur.cp_time[i];
288 for (i = 0; i < CPUSTATES; i++)
292 for (i = 0; i < num_devices; i++)
293 if (dev_select[i].selected) {
294 if (row > wnd->_maxy - linesperregion)
296 row = devstats(row, INSET, i);
301 wmove(wnd, row + linesperregion, 0);
303 wmove(wnd, row + 3, 0);
305 for (i = 0; i < num_devices; i++)
306 if (dev_select[i].selected) {
307 if (col + COLWIDTH >= wnd->_maxx - INSET) {
308 col = INSET, row += linesperregion + 1;
309 if (row > wnd->_maxy - (linesperregion + 1))
311 wmove(wnd, row + linesperregion, 0);
313 wmove(wnd, row + 3, 0);
316 (void) devstats(row + 3, col, i);
322 devstats(int row, int col, int dn)
324 long double transfers_per_second;
325 long double kb_per_transfer, mb_per_second;
326 long double busy_seconds;
329 di = dev_select[dn].position;
331 busy_seconds = compute_etime(cur.busy_time, last.busy_time);
333 if (compute_stats(&cur.dinfo->devices[di], &last.dinfo->devices[di],
334 busy_seconds, NULL, NULL, NULL,
335 &kb_per_transfer, &transfers_per_second,
336 &mb_per_second, NULL, NULL) != 0)
337 errx(1, "%s", devstat_errbuf);
340 mvwprintw(wnd, row, col, " %5.2Lf %3.0Lf %5.2Lf ",
341 kb_per_transfer, transfers_per_second,
345 wmove(wnd, row++, col);
346 histogram(mb_per_second, 50, .5);
347 wmove(wnd, row++, col);
348 histogram(transfers_per_second, 50, .5);
350 wmove(wnd, row++, col);
351 histogram(kb_per_transfer, 50, .5);
359 stat1(int row, int o)
365 for (i = 0; i < CPUSTATES; i++)
366 time += cur.cp_time[i];
369 wmove(wnd, row, INSET);
371 histogram(100.0 * cur.cp_time[o] / time, 50, CPUSCALE);
375 histogram(long double val, int colwidth, double scale)
379 register int v = (int)(val * scale) + 0.5;
381 k = MIN(v, colwidth);
383 snprintf(buf, sizeof(buf), "%5.2Lf", val);
396 cmdiostat(char *cmd, char *args)
399 if (prefix(cmd, "kbpt"))
401 else if (prefix(cmd, "numbers"))
403 else if (prefix(cmd, "bars"))
405 else if (!dscmd(cmd, args, 100, &cur))