1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1998 Kenneth D. Merry.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30 /*
31 * Copyright (c) 1980, 1992, 1993
32 * The Regents of the University of California. All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 * 3. Neither the name of the University nor the names of its contributors
43 * may be used to endorse or promote products derived from this software
44 * without specific prior written permission.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 */
58
59
60
61 #include <sys/param.h>
62 #include <sys/sysctl.h>
63 #include <sys/resource.h>
64
65 #include <devstat.h>
66 #include <err.h>
67 #include <nlist.h>
68 #include <paths.h>
69 #include <stdbool.h>
70 #include <stdlib.h>
71 #include <string.h>
72
73 #include "systat.h"
74 #include "extern.h"
75 #include "devs.h"
76
77 static int linesperregion;
78 static double etime;
79 static bool numbers = false; /* default display bar graphs */
80 static bool kbpt = false; /* default ms/seek shown */
81
82 static int barlabels(int);
83 static void histogram(long double, int, double);
84 static int numlabels(int);
85 static int devstats(int, int, int);
86 static void stat1(int, int);
87
88 WINDOW *
openiostat(void)89 openiostat(void)
90 {
91 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
92 }
93
94 void
closeiostat(WINDOW * w)95 closeiostat(WINDOW *w)
96 {
97 if (w == NULL)
98 return;
99 wclear(w);
100 wrefresh(w);
101 delwin(w);
102 }
103
104 int
initiostat(void)105 initiostat(void)
106 {
107 /*
108 * This value for maxshowdevs (100) is bogus. I'm not sure exactly
109 * how to calculate it, though.
110 */
111 if (dsinit(7) != 1)
112 return(0);
113
114 return(1);
115 }
116
117 void
fetchiostat(void)118 fetchiostat(void)
119 {
120 struct devinfo *tmp_dinfo;
121 size_t len;
122
123 len = sizeof(cur_dev.cp_time);
124 if (sysctlbyname("kern.cp_time", &cur_dev.cp_time, &len, NULL, 0)
125 || len != sizeof(cur_dev.cp_time)) {
126 perror("kern.cp_time");
127 exit (1);
128 }
129 tmp_dinfo = last_dev.dinfo;
130 last_dev.dinfo = cur_dev.dinfo;
131 cur_dev.dinfo = tmp_dinfo;
132
133 last_dev.snap_time = cur_dev.snap_time;
134
135 /*
136 * Here what we want to do is refresh our device stats.
137 * getdevs() returns 1 when the device list has changed.
138 * If the device list has changed, we want to go through
139 * the selection process again, in case a device that we
140 * were previously displaying has gone away.
141 */
142 switch (devstat_getdevs(NULL, &cur_dev)) {
143 case -1:
144 errx(1, "%s", devstat_errbuf);
145 break;
146 case 1:
147 cmdiostat("refresh", NULL);
148 break;
149 default:
150 break;
151 }
152 num_devices = cur_dev.dinfo->numdevs;
153 generation = cur_dev.dinfo->generation;
154
155 }
156
157 #define INSET 10
158
159 void
labeliostat(void)160 labeliostat(void)
161 {
162 int row;
163
164 row = 0;
165 wmove(wnd, row, 0); wclrtobot(wnd);
166 mvwaddstr(wnd, row++, INSET,
167 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
168 mvwaddstr(wnd, row++, 0, "cpu user|");
169 mvwaddstr(wnd, row++, 0, " nice|");
170 mvwaddstr(wnd, row++, 0, " system|");
171 mvwaddstr(wnd, row++, 0, "interrupt|");
172 mvwaddstr(wnd, row++, 0, " idle|");
173 if (numbers)
174 row = numlabels(row + 1);
175 else
176 row = barlabels(row + 1);
177 }
178
179 static int
numlabels(int row)180 numlabels(int row)
181 {
182 int i, _col, regions, ndrives;
183 char tmpstr[32];
184
185 #define COLWIDTH 17
186 #define DRIVESPERLINE ((getmaxx(wnd) - 1 - INSET) / COLWIDTH)
187 for (ndrives = 0, i = 0; i < num_devices; i++)
188 if (dev_select[i].selected)
189 ndrives++;
190 regions = howmany(ndrives, DRIVESPERLINE);
191 /*
192 * Deduct -regions for blank line after each scrolling region.
193 */
194 linesperregion = (getmaxy(wnd) - 1 - row - regions) / regions;
195 /*
196 * Minimum region contains space for two
197 * label lines and one line of statistics.
198 */
199 if (linesperregion < 3)
200 linesperregion = 3;
201 _col = INSET;
202 for (i = 0; i < num_devices; i++)
203 if (dev_select[i].selected) {
204 if (_col + COLWIDTH >= getmaxx(wnd) - 1 - INSET) {
205 _col = INSET, row += linesperregion + 1;
206 if (row > getmaxy(wnd) - 1 - (linesperregion + 1))
207 break;
208 }
209 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dev_select[i].device_name,
210 dev_select[i].unit_number);
211 mvwaddstr(wnd, row, _col + 4, tmpstr);
212 mvwaddstr(wnd, row + 1, _col, " KB/t tps MB/s ");
213 _col += COLWIDTH;
214 }
215 if (_col)
216 row += linesperregion + 1;
217 return (row);
218 }
219
220 static int
barlabels(int row)221 barlabels(int row)
222 {
223 int i;
224 char tmpstr[32];
225
226 mvwaddstr(wnd, row++, INSET,
227 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
228 linesperregion = 2 + kbpt;
229 for (i = 0; i < num_devices; i++)
230 if (dev_select[i].selected) {
231 if (row > getmaxy(wnd) - 1 - linesperregion)
232 break;
233 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dev_select[i].device_name,
234 dev_select[i].unit_number);
235 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|",
236 tmpstr);
237 mvwaddstr(wnd, row++, 0, " tps|");
238 if (kbpt)
239 mvwaddstr(wnd, row++, 0, " KB/t|");
240 }
241 return (row);
242 }
243
244 void
showiostat(void)245 showiostat(void)
246 {
247 long t;
248 int i, row, _col;
249
250 #define X(fld) t = cur_dev.fld[i]; cur_dev.fld[i] -= last_dev.fld[i]; last_dev.fld[i] = t
251 etime = 0;
252 for(i = 0; i < CPUSTATES; i++) {
253 X(cp_time);
254 etime += cur_dev.cp_time[i];
255 }
256 if (etime == 0.0)
257 etime = 1.0;
258 etime /= hertz;
259 row = 1;
260 for (i = 0; i < CPUSTATES; i++)
261 stat1(row++, i);
262 if (!numbers) {
263 row += 2;
264 for (i = 0; i < num_devices; i++)
265 if (dev_select[i].selected) {
266 if (row > getmaxy(wnd) - linesperregion)
267 break;
268 row = devstats(row, INSET, i);
269 }
270 return;
271 }
272 _col = INSET;
273 wmove(wnd, row + linesperregion, 0);
274 wdeleteln(wnd);
275 wmove(wnd, row + 3, 0);
276 winsertln(wnd);
277 for (i = 0; i < num_devices; i++)
278 if (dev_select[i].selected) {
279 if (_col + COLWIDTH >= getmaxx(wnd) - 1 - INSET) {
280 _col = INSET, row += linesperregion + 1;
281 if (row > getmaxy(wnd) - 1 - (linesperregion + 1))
282 break;
283 wmove(wnd, row + linesperregion, 0);
284 wdeleteln(wnd);
285 wmove(wnd, row + 3, 0);
286 winsertln(wnd);
287 }
288 (void) devstats(row + 3, _col, i);
289 _col += COLWIDTH;
290 }
291 }
292
293 static int
devstats(int row,int _col,int dn)294 devstats(int row, int _col, int dn)
295 {
296 long double transfers_per_second;
297 long double kb_per_transfer, mb_per_second;
298 long double busy_seconds;
299 int di;
300
301 di = dev_select[dn].position;
302
303 busy_seconds = cur_dev.snap_time - last_dev.snap_time;
304
305 if (devstat_compute_statistics(&cur_dev.dinfo->devices[di],
306 &last_dev.dinfo->devices[di], busy_seconds,
307 DSM_KB_PER_TRANSFER, &kb_per_transfer,
308 DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
309 DSM_MB_PER_SECOND, &mb_per_second, DSM_NONE) != 0)
310 errx(1, "%s", devstat_errbuf);
311
312 if (numbers) {
313 mvwprintw(wnd, row, _col, " %5.2Lf %3.0Lf %5.2Lf ",
314 kb_per_transfer, transfers_per_second,
315 mb_per_second);
316 return(row);
317 }
318 wmove(wnd, row++, _col);
319 histogram(mb_per_second, 50, .5);
320 wmove(wnd, row++, _col);
321 histogram(transfers_per_second, 50, .5);
322 if (kbpt) {
323 wmove(wnd, row++, _col);
324 histogram(kb_per_transfer, 50, .5);
325 }
326
327 return(row);
328
329 }
330
331 static void
stat1(int row,int o)332 stat1(int row, int o)
333 {
334 int i;
335 double dtime;
336
337 dtime = 0.0;
338 for (i = 0; i < CPUSTATES; i++)
339 dtime += cur_dev.cp_time[i];
340 if (dtime == 0.0)
341 dtime = 1.0;
342 wmove(wnd, row, INSET);
343 #define CPUSCALE 0.5
344 histogram(100.0 * cur_dev.cp_time[o] / dtime, 50, CPUSCALE);
345 }
346
347 static void
histogram(long double val,int colwidth,double scale)348 histogram(long double val, int colwidth, double scale)
349 {
350 char buf[10];
351 int k;
352 int v = (int)(val * scale) + 0.5;
353
354 k = MIN(v, colwidth);
355 if (v > colwidth) {
356 snprintf(buf, sizeof(buf), "%5.2Lf", val);
357 k -= strlen(buf);
358 while (k--)
359 waddch(wnd, 'X');
360 waddstr(wnd, buf);
361 return;
362 }
363 while (k--)
364 waddch(wnd, 'X');
365 wclrtoeol(wnd);
366 }
367
368 int
cmdiostat(const char * cmd,const char * args)369 cmdiostat(const char *cmd, const char *args)
370 {
371
372 if (prefix(cmd, "kbpt"))
373 kbpt = !kbpt;
374 else if (prefix(cmd, "numbers"))
375 numbers = true;
376 else if (prefix(cmd, "bars"))
377 numbers = false;
378 else if (!dscmd(cmd, args, 100, &cur_dev))
379 return (0);
380 wclear(wnd);
381 labeliostat();
382 refresh();
383 return (1);
384 }
385