iostat.c revision 1.27 1 /* $NetBSD: iostat.c,v 1.27 2002/06/30 00:10:35 sommerfeld Exp $ */
2
3 /*
4 * Copyright (c) 1996 John M. Vinopal
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. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the NetBSD Project
18 * by John M. Vinopal.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*-
36 * Copyright (c) 1986, 1991, 1993
37 * The Regents of the University of California. All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
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.
54 *
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
65 * SUCH DAMAGE.
66 */
67
68 #include <sys/cdefs.h>
69 #ifndef lint
70 __COPYRIGHT("@(#) Copyright (c) 1986, 1991, 1993\n\
71 The Regents of the University of California. All rights reserved.\n");
72 #endif /* not lint */
73
74 #ifndef lint
75 #if 0
76 static char sccsid[] = "@(#)iostat.c 8.3 (Berkeley) 4/28/95";
77 #else
78 __RCSID("$NetBSD: iostat.c,v 1.27 2002/06/30 00:10:35 sommerfeld Exp $");
79 #endif
80 #endif /* not lint */
81
82 #include <sys/types.h>
83 #include <sys/sched.h>
84 #include <sys/dkstat.h>
85 #include <sys/time.h>
86
87 #include <err.h>
88 #include <ctype.h>
89 #include <signal.h>
90 #include <stdio.h>
91 #include <stdlib.h>
92 #include <string.h>
93 #include <unistd.h>
94
95 #include "dkstats.h"
96
97 /* Namelist and memory files. */
98 char *nlistf, *memf;
99
100 int hz, reps, interval;
101 static int todo = 0;
102
103 #define ISSET(x, a) ((x) & (a))
104 #define SHOW_CPU 1<<0
105 #define SHOW_TTY 1<<1
106 #define SHOW_STATS_1 1<<2
107 #define SHOW_STATS_2 1<<3
108 #define SHOW_STATS_X 1<<4
109 #define SHOW_TOTALS 1<<7
110 #define SHOW_STATS_ALL (SHOW_STATS_1 | SHOW_STATS_2 | SHOW_STATS_X)
111
112 static void cpustats(void);
113 static void disk_stats(double);
114 static void disk_stats2(double);
115 static void disk_statsx(double);
116 static void header(int);
117 static void usage(void);
118 static void display(void);
119 static void selectdrives(int, char **);
120
121 int main(int, char **);
122
123 int
124 main(int argc, char *argv[])
125 {
126 int ch, hdrcnt;
127 struct timeval tv;
128
129 while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:x")) != -1)
130 switch(ch) {
131 case 'c':
132 if ((reps = atoi(optarg)) <= 0)
133 errx(1, "repetition count <= 0.");
134 break;
135 case 'C':
136 todo |= SHOW_CPU;
137 break;
138 case 'd':
139 todo &= ~SHOW_STATS_ALL;
140 todo |= SHOW_STATS_1;
141 break;
142 case 'D':
143 todo &= ~SHOW_STATS_ALL;
144 todo |= SHOW_STATS_2;
145 break;
146 case 'I':
147 todo |= SHOW_TOTALS;
148 break;
149 case 'M':
150 memf = optarg;
151 break;
152 case 'N':
153 nlistf = optarg;
154 break;
155 case 'T':
156 todo |= SHOW_TTY;
157 break;
158 case 'w':
159 if ((interval = atoi(optarg)) <= 0)
160 errx(1, "interval <= 0.");
161 break;
162 case 'x':
163 todo &= ~SHOW_STATS_ALL;
164 todo |= SHOW_STATS_X;
165 break;
166 case '?':
167 default:
168 usage();
169 }
170 argc -= optind;
171 argv += optind;
172
173 if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL))
174 todo |= SHOW_CPU | SHOW_TTY | SHOW_STATS_1;
175 if (ISSET(todo, SHOW_STATS_X)) {
176 todo &= ~(SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL);
177 todo |= SHOW_STATS_X;
178 }
179
180 dkinit(0);
181 dkreadstats();
182 selectdrives(argc, argv);
183
184 tv.tv_sec = interval;
185 tv.tv_usec = 0;
186
187 /* print a new header on sigcont */
188 (void)signal(SIGCONT, header);
189
190 for (hdrcnt = 1;;) {
191 if (!--hdrcnt) {
192 header(0);
193 hdrcnt = 20;
194 }
195
196 if (!ISSET(todo, SHOW_TOTALS))
197 dkswap();
198 display();
199
200 if (reps >= 0 && --reps <= 0)
201 break;
202 select(0, NULL, NULL, NULL, &tv);
203 dkreadstats();
204 }
205 exit(0);
206 }
207
208 static void
209 header(int signo)
210 {
211 int i;
212
213 if (ISSET(todo, SHOW_STATS_X))
214 return;
215
216 /* Main Headers. */
217 if (ISSET(todo, SHOW_TTY))
218 (void)printf(" tty");
219
220 if (ISSET(todo, SHOW_STATS_1))
221 for (i = 0; i < dk_ndrive; i++)
222 if (cur.dk_select[i])
223 (void)printf(
224 " %7.7s ", cur.dk_name[i]);
225
226 if (ISSET(todo, SHOW_STATS_2))
227 for (i = 0; i < dk_ndrive; i++)
228 if (cur.dk_select[i])
229 (void)printf(
230 " %7.7s ", cur.dk_name[i]);
231
232 if (ISSET(todo, SHOW_CPU))
233 (void)printf(" cpu");
234
235 printf("\n");
236
237 /* Sub-Headers. */
238 if (ISSET(todo, SHOW_TTY))
239 printf(" tin tout");
240
241 if (ISSET(todo, SHOW_STATS_1)) {
242 for (i = 0; i < dk_ndrive; i++)
243 if (cur.dk_select[i]) {
244 if (ISSET(todo, SHOW_TOTALS))
245 (void)printf(" KB/t xfr MB ");
246 else
247 (void)printf(" KB/t t/s MB/s ");
248 }
249 }
250
251 if (ISSET(todo, SHOW_STATS_2))
252 for (i = 0; i < dk_ndrive; i++)
253 if (cur.dk_select[i])
254 (void)printf(" KB xfr time ");
255
256 if (ISSET(todo, SHOW_CPU))
257 (void)printf(" us ni sy in id");
258 printf("\n");
259 }
260
261 static void
262 disk_stats(double etime)
263 {
264 int dn;
265 double atime, mbps;
266
267 for (dn = 0; dn < dk_ndrive; ++dn) {
268 if (!cur.dk_select[dn])
269 continue;
270
271 /* average Kbytes per transfer. */
272 if (cur.dk_xfer[dn])
273 mbps = (cur.dk_bytes[dn] / (1024.0)) / cur.dk_xfer[dn];
274 else
275 mbps = 0.0;
276 (void)printf(" %5.2f", mbps);
277
278 /* average transfers per second. */
279 (void)printf(" %3.0f", cur.dk_xfer[dn] / etime);
280
281 /* time busy in disk activity */
282 atime = (double)cur.dk_time[dn].tv_sec +
283 ((double)cur.dk_time[dn].tv_usec / (double)1000000);
284
285 /* Megabytes per second. */
286 if (atime != 0.0)
287 mbps = cur.dk_bytes[dn] / (double)(1024 * 1024);
288 else
289 mbps = 0;
290 (void)printf(" %4.2f ", mbps / etime);
291 }
292 }
293
294 static void
295 disk_stats2(double etime)
296 {
297 int dn;
298 double atime;
299
300 for (dn = 0; dn < dk_ndrive; ++dn) {
301 if (!cur.dk_select[dn])
302 continue;
303
304 /* average kbytes per second. */
305 (void)printf(" %4.0f", cur.dk_bytes[dn] / (1024.0) / etime);
306
307 /* average transfers per second. */
308 (void)printf(" %3.0f", cur.dk_xfer[dn] / etime);
309
310 /* average time busy in disk activity */
311 atime = (double)cur.dk_time[dn].tv_sec +
312 ((double)cur.dk_time[dn].tv_usec / (double)1000000);
313 (void)printf(" %4.2f ", atime / etime);
314 }
315 }
316
317 static void
318 disk_statsx(double etime)
319 {
320 int dn;
321 double atime, kbps;
322
323 if (ISSET(todo, SHOW_TOTALS))
324 (void)printf("device KB/t xfr time MB");
325 else
326 (void)printf("device KB/t t/s time MB/s");
327
328 for (dn = 0; dn < dk_ndrive; ++dn) {
329 (void)printf("\n");
330 (void)printf("%-8.8s", cur.dk_name[dn]);
331
332 /* average Kbytes per transfer */
333 if (cur.dk_xfer[dn])
334 kbps = (cur.dk_bytes[dn] / (1024.0)) / cur.dk_xfer[dn];
335 else
336 kbps = 0.0;
337 (void)printf(" %8.2f", kbps);
338
339 /* average transfers (per second) */
340 (void)printf(" %8.0f", cur.dk_xfer[dn] / etime);
341
342 /* time busy in disk activity */
343 atime = (double)cur.dk_time[dn].tv_sec +
344 ((double)cur.dk_time[dn].tv_usec / (double)1000000);
345 (void)printf(" %8.2f", atime / etime);
346
347 /* average megabytes (per second) */
348 (void)printf(" %8.2f",
349 cur.dk_bytes[dn] / (1024.0 * 1024) / etime);
350
351 }
352 }
353
354 static void
355 cpustats(void)
356 {
357 int state;
358 double time;
359
360 time = 0;
361 for (state = 0; state < CPUSTATES; ++state)
362 time += cur.cp_time[state];
363 if (!time)
364 time = 1.0;
365 /* States are generally never 100% and can use %3.0f. */
366 for (state = 0; state < CPUSTATES; ++state)
367 printf(" %2.0f", 100. * cur.cp_time[state] / time);
368 }
369
370 static void
371 usage(void)
372 {
373
374 (void)fprintf(stderr, "usage: iostat [-CdDITx] [-c count] [-M core] \
375 [-N system] [-w wait] [drives]\n");
376 exit(1);
377 }
378
379 static void
380 display(void)
381 {
382 double etime;
383
384 /* Sum up the elapsed ticks. */
385 etime = cur.cp_etime;
386
387 /* If we're showing totals only, then don't divide by the
388 * system time.
389 */
390 if (ISSET(todo, SHOW_TOTALS))
391 etime = 1.0;
392
393 if (ISSET(todo, SHOW_TTY))
394 printf("%4.0f %4.0f", cur.tk_nin / etime, cur.tk_nout / etime);
395
396 if (ISSET(todo, SHOW_STATS_1))
397 disk_stats(etime);
398
399 if (ISSET(todo, SHOW_STATS_2))
400 disk_stats2(etime);
401
402 if (ISSET(todo, SHOW_STATS_X))
403 disk_statsx(etime);
404
405 if (ISSET(todo, SHOW_CPU))
406 cpustats();
407
408 (void)printf("\n");
409 (void)fflush(stdout);
410 }
411
412 static void
413 selectdrives(int argc, char *argv[])
414 {
415 int i, ndrives;
416
417 /*
418 * Choose drives to be displayed. Priority goes to (in order) drives
419 * supplied as arguments and default drives. If everything isn't
420 * filled in and there are drives not taken care of, display the first
421 * few that fit.
422 *
423 * The backward compatibility #ifdefs permit the syntax:
424 * iostat [ drives ] [ interval [ count ] ]
425 */
426 if (ISSET(todo, SHOW_STATS_X)) {
427 for (i = 0; i < dk_ndrive; i++)
428 cur.dk_select[i] = 1;
429 }
430
431 #define BACKWARD_COMPATIBILITY
432 for (ndrives = 0; *argv; ++argv) {
433 #ifdef BACKWARD_COMPATIBILITY
434 if (isdigit(**argv))
435 break;
436 #endif
437 if (!ISSET(todo, SHOW_STATS_X))
438 for (i = 0; i < dk_ndrive; i++) {
439 if (strcmp(cur.dk_name[i], *argv))
440 continue;
441 cur.dk_select[i] = 1;
442 ++ndrives;
443 }
444 }
445 #ifdef BACKWARD_COMPATIBILITY
446 if (*argv) {
447 interval = atoi(*argv);
448 if (*++argv)
449 reps = atoi(*argv);
450 }
451 #endif
452
453 if (interval) {
454 if (!reps)
455 reps = -1;
456 } else
457 if (reps)
458 interval = 1;
459
460 /* Pick up to 4 drives if none specified. */
461 if (ndrives == 0)
462 for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
463 if (cur.dk_select[i])
464 continue;
465 cur.dk_select[i] = 1;
466 ++ndrives;
467 }
468 }
469