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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1986, 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
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. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | char copyright[] = | |
36 | "@(#) Copyright (c) 1986, 1991 The Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)iostat.c 5.9 (Berkeley) 6/27/91"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | #include <sys/param.h> | |
45 | #include <sys/buf.h> | |
46 | #include <sys/dkstat.h> | |
47 | #include <signal.h> | |
48 | #include <fcntl.h> | |
49 | #include <nlist.h> | |
50 | #include <unistd.h> | |
51 | #include <stdio.h> | |
52 | #include <ctype.h> | |
53 | #include <stdlib.h> | |
54 | #include <string.h> | |
55 | #include <paths.h> | |
56 | #include <kvm.h> | |
57 | ||
58 | struct nlist nl[] = { | |
59 | #define X_DK_TIME 0 | |
60 | { "_dk_time" }, | |
61 | #define X_DK_XFER 1 | |
62 | { "_dk_xfer" }, | |
63 | #define X_DK_WDS 2 | |
64 | { "_dk_wds" }, | |
65 | #define X_TK_NIN 3 | |
66 | { "_tk_nin" }, | |
67 | #define X_TK_NOUT 4 | |
68 | { "_tk_nout" }, | |
69 | #define X_DK_SEEK 5 | |
70 | { "_dk_seek" }, | |
71 | #define X_CP_TIME 6 | |
72 | { "_cp_time" }, | |
73 | #define X_DK_WPMS 7 | |
74 | { "_dk_wpms" }, | |
75 | #define X_HZ 8 | |
76 | { "_hz" }, | |
77 | #define X_PHZ 9 | |
78 | { "_phz" }, | |
79 | #define X_DK_NDRIVE 10 | |
80 | { "_dk_ndrive" }, | |
81 | #define X_END 10 | |
82 | #ifdef hp300 | |
83 | #define X_HPDINIT (X_END+1) | |
84 | { "_hp_dinit" }, | |
85 | #endif | |
86 | #ifdef tahoe | |
87 | #define X_VBDINIT (X_END+1) | |
88 | { "_vbdinit" }, | |
89 | #endif | |
90 | #ifdef vax | |
91 | { "_mbdinit" }, | |
92 | #define X_MBDINIT (X_END+1) | |
93 | { "_ubdinit" }, | |
94 | #define X_UBDINIT (X_END+2) | |
95 | #endif | |
96 | #ifdef __386BSD__ | |
97 | #define X_ISA_BIO (X_END+1) | |
98 | { "_isa_devtab_bio" }, | |
99 | #endif /* __386BSD__ */ | |
100 | { NULL }, | |
101 | }; | |
102 | ||
103 | struct _disk { | |
104 | long cp_time[CPUSTATES]; | |
105 | long *dk_time; | |
106 | long *dk_wds; | |
107 | long *dk_seek; | |
108 | long *dk_xfer; | |
109 | long tk_nin; | |
110 | long tk_nout; | |
111 | } cur, last; | |
112 | ||
113 | double etime; | |
114 | long *dk_wpms; | |
115 | int dk_ndrive, *dr_select, hz, kmemfd, ndrives; | |
116 | char **dr_name; | |
117 | ||
118 | #define nlread(x, v) \ | |
119 | kvm_read((void *)nl[x].n_value, (void *)&(v), sizeof(v)) | |
120 | ||
121 | #include "names.c" /* XXX */ | |
122 | ||
123 | static void cpustats __P((void)), dkstats __P((void)), phdr __P((int)); | |
124 | static void usage __P((void)), err __P((const char *, ...)); | |
125 | ||
126 | main(argc, argv) | |
127 | int argc; | |
128 | char **argv; | |
129 | { | |
130 | register int i; | |
131 | long tmp; | |
132 | int ch, hdrcnt, reps, interval, phz, ndrives; | |
133 | char **cp, *memfile, *namelist, buf[30]; | |
134 | ||
135 | interval = reps = 0; | |
136 | namelist = memfile = NULL; | |
137 | while ((ch = getopt(argc, argv, "c:M:N:w:")) != EOF) | |
138 | switch(ch) { | |
139 | case 'c': | |
140 | reps = atoi(optarg); | |
141 | break; | |
142 | case 'M': | |
143 | memfile = optarg; | |
144 | break; | |
145 | case 'N': | |
146 | namelist = optarg; | |
147 | break; | |
148 | case 'w': | |
149 | interval = atoi(optarg); | |
150 | break; | |
151 | case '?': | |
152 | default: | |
153 | usage(); | |
154 | } | |
155 | argc -= optind; | |
156 | argv += optind; | |
157 | ||
158 | if (kvm_openfiles(namelist, memfile, NULL) == -1) | |
159 | err("kvm_openfiles: %s", kvm_geterr()); | |
160 | if (kvm_nlist(nl) == -1) | |
161 | err("kvm_nlist: %s", kvm_geterr()); | |
162 | if (nl[X_DK_NDRIVE].n_type == 0) | |
163 | err("dk_ndrive not found in namelist"); | |
164 | (void)nlread(X_DK_NDRIVE, dk_ndrive); | |
165 | if (dk_ndrive <= 0) | |
166 | err("invalid dk_ndrive %d\n", dk_ndrive); | |
167 | ||
168 | cur.dk_time = calloc(dk_ndrive, sizeof(long)); | |
169 | cur.dk_wds = calloc(dk_ndrive, sizeof(long)); | |
170 | cur.dk_seek = calloc(dk_ndrive, sizeof(long)); | |
171 | cur.dk_xfer = calloc(dk_ndrive, sizeof(long)); | |
172 | last.dk_time = calloc(dk_ndrive, sizeof(long)); | |
173 | last.dk_wds = calloc(dk_ndrive, sizeof(long)); | |
174 | last.dk_seek = calloc(dk_ndrive, sizeof(long)); | |
175 | last.dk_xfer = calloc(dk_ndrive, sizeof(long)); | |
176 | dr_select = calloc(dk_ndrive, sizeof(int)); | |
177 | dr_name = calloc(dk_ndrive, sizeof(char *)); | |
178 | dk_wpms = calloc(dk_ndrive, sizeof(long)); | |
179 | ||
180 | for (i = 0; i < dk_ndrive; i++) { | |
181 | (void)sprintf(buf, "dk%d", i); | |
182 | dr_name[i] = strdup(buf); | |
183 | } | |
184 | read_names(); | |
185 | (void)nlread(X_HZ, hz); | |
186 | (void)nlread(X_PHZ, phz); | |
187 | if (phz) | |
188 | hz = phz; | |
189 | (void)kvm_read((void *)nl[X_DK_WPMS].n_value, dk_wpms, | |
190 | dk_ndrive * sizeof(dk_wpms)); | |
191 | ||
192 | /* | |
193 | * Choose drives to be displayed. Priority goes to (in order) drives | |
194 | * supplied as arguments and default drives. If everything isn't | |
195 | * filled in and there are drives not taken care of, display the first | |
196 | * few that fit. | |
197 | * | |
198 | * The backward compatibility #ifdefs permit the syntax: | |
199 | * iostat [ drives ] [ interval [ count ] ] | |
200 | */ | |
201 | #define BACKWARD_COMPATIBILITY | |
202 | for (ndrives = 0; *argv; ++argv) { | |
203 | #ifdef BACKWARD_COMPATIBILITY | |
204 | if (isdigit(**argv)) | |
205 | break; | |
206 | #endif | |
207 | for (i = 0; i < dk_ndrive; i++) { | |
208 | if (strcmp(dr_name[i], *argv)) | |
209 | continue; | |
210 | dr_select[i] = 1; | |
211 | ++ndrives; | |
212 | } | |
213 | } | |
214 | #ifdef BACKWARD_COMPATIBILITY | |
215 | if (*argv) { | |
216 | interval = atoi(*argv); | |
217 | if (*++argv) | |
218 | reps = atoi(*argv); | |
219 | } | |
220 | #endif | |
221 | ||
222 | if (interval) { | |
223 | if (!reps) | |
224 | reps = -1; | |
225 | } else | |
226 | if (reps) | |
227 | interval = 1; | |
228 | ||
229 | for (i = 0; i < dk_ndrive && ndrives < 4; i++) { | |
230 | if (dr_select[i] || dk_wpms[i] == 0) | |
231 | continue; | |
232 | for (cp = defdrives; *cp; cp++) | |
233 | if (strcmp(dr_name[i], *cp) == 0) { | |
234 | dr_select[i] = 1; | |
235 | ++ndrives; | |
236 | break; | |
237 | } | |
238 | } | |
239 | for (i = 0; i < dk_ndrive && ndrives < 4; i++) { | |
240 | if (dr_select[i]) | |
241 | continue; | |
242 | dr_select[i] = 1; | |
243 | ++ndrives; | |
244 | } | |
245 | ||
246 | (void)signal(SIGCONT, phdr); | |
247 | ||
248 | for (hdrcnt = 1;;) { | |
249 | if (!--hdrcnt) { | |
250 | phdr(0); | |
251 | hdrcnt = 20; | |
252 | } | |
253 | (void)kvm_read((void *)nl[X_DK_TIME].n_value, | |
254 | cur.dk_time, dk_ndrive * sizeof(long)); | |
255 | (void)kvm_read((void *)nl[X_DK_XFER].n_value, | |
256 | cur.dk_xfer, dk_ndrive * sizeof(long)); | |
257 | (void)kvm_read((void *)nl[X_DK_WDS].n_value, | |
258 | cur.dk_wds, dk_ndrive * sizeof(long)); | |
259 | (void)kvm_read((void *)nl[X_DK_SEEK].n_value, | |
260 | cur.dk_seek, dk_ndrive * sizeof(long)); | |
261 | (void)kvm_read((void *)nl[X_TK_NIN].n_value, | |
262 | &cur.tk_nin, sizeof(cur.tk_nin)); | |
263 | (void)kvm_read((void *)nl[X_TK_NOUT].n_value, | |
264 | &cur.tk_nout, sizeof(cur.tk_nout)); | |
265 | (void)kvm_read((void *)nl[X_CP_TIME].n_value, | |
266 | cur.cp_time, sizeof(cur.cp_time)); | |
267 | for (i = 0; i < dk_ndrive; i++) { | |
268 | if (!dr_select[i]) | |
269 | continue; | |
270 | #define X(fld) tmp = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = tmp | |
271 | X(dk_xfer); | |
272 | X(dk_seek); | |
273 | X(dk_wds); | |
274 | X(dk_time); | |
275 | } | |
276 | tmp = cur.tk_nin; | |
277 | cur.tk_nin -= last.tk_nin; | |
278 | last.tk_nin = tmp; | |
279 | tmp = cur.tk_nout; | |
280 | cur.tk_nout -= last.tk_nout; | |
281 | last.tk_nout = tmp; | |
282 | etime = 0; | |
283 | for (i = 0; i < CPUSTATES; i++) { | |
284 | X(cp_time); | |
285 | etime += cur.cp_time[i]; | |
286 | } | |
287 | if (etime == 0.0) | |
288 | etime = 1.0; | |
289 | etime /= (float)hz; | |
290 | (void)printf("%4.0f%5.0f", | |
291 | cur.tk_nin / etime, cur.tk_nout / etime); | |
292 | dkstats(); | |
293 | cpustats(); | |
294 | (void)printf("\n"); | |
295 | (void)fflush(stdout); | |
296 | ||
297 | if (reps >= 0 && --reps <= 0) | |
298 | break; | |
299 | (void)sleep(interval); | |
300 | } | |
301 | exit(0); | |
302 | } | |
303 | ||
304 | /* ARGUSED */ | |
305 | void | |
306 | phdr(notused) | |
307 | int notused; | |
308 | { | |
309 | register int i; | |
310 | ||
311 | (void)printf(" tty"); | |
312 | for (i = 0; i < dk_ndrive; i++) | |
313 | if (dr_select[i]) | |
314 | (void)printf(" %3.3s ", dr_name[i]); | |
315 | (void)printf(" cpu\n tin tout"); | |
316 | for (i = 0; i < dk_ndrive; i++) | |
317 | if (dr_select[i]) | |
318 | (void)printf(" sps tps msps "); | |
319 | (void)printf(" us ni sy id\n"); | |
320 | } | |
321 | ||
322 | void | |
323 | dkstats() | |
324 | { | |
325 | register int dn; | |
326 | double atime, itime, msps, words, xtime; | |
327 | ||
328 | for (dn = 0; dn < dk_ndrive; ++dn) { | |
329 | if (!dr_select[dn]) | |
330 | continue; | |
331 | words = cur.dk_wds[dn] * 32; /* words xfer'd */ | |
332 | (void)printf("%4.0f", /* sectors */ | |
333 | words / (DEV_BSIZE / 2) / etime); | |
334 | ||
335 | (void)printf("%4.0f", cur.dk_xfer[dn] / etime); | |
336 | ||
337 | if (dk_wpms[dn] && cur.dk_xfer[dn]) { | |
338 | atime = cur.dk_time[dn]; /* ticks disk busy */ | |
339 | atime /= (float)hz; /* ticks to seconds */ | |
340 | xtime = words / dk_wpms[dn]; /* transfer time */ | |
341 | itime = atime - xtime; /* time not xfer'ing */ | |
342 | if (itime < 0) | |
343 | msps = 0; | |
344 | else | |
345 | msps = itime * 1000 / cur.dk_xfer[dn]; | |
346 | } else | |
347 | msps = 0; | |
348 | (void)printf("%5.1f ", msps); | |
349 | } | |
350 | } | |
351 | ||
352 | void | |
353 | cpustats() | |
354 | { | |
355 | register int state; | |
356 | double time; | |
357 | ||
358 | time = 0; | |
359 | for (state = 0; state < CPUSTATES; ++state) | |
360 | time += cur.cp_time[state]; | |
361 | for (state = 0; state < CPUSTATES; ++state) | |
362 | (void)printf("%3.0f", | |
363 | 100. * cur.cp_time[state] / (time ? time : 1)); | |
364 | } | |
365 | ||
366 | void | |
367 | usage() | |
368 | { | |
369 | (void)fprintf(stderr, | |
370 | "usage: iostat [-c count] [-M core] [-N system] [-w wait] [drives]\n"); | |
371 | exit(1); | |
372 | } | |
373 | ||
374 | #if __STDC__ | |
375 | #include <stdarg.h> | |
376 | #else | |
377 | #include <varargs.h> | |
378 | #endif | |
379 | ||
380 | void | |
381 | #if __STDC__ | |
382 | err(const char *fmt, ...) | |
383 | #else | |
384 | err(fmt, va_alist) | |
385 | char *fmt; | |
386 | va_dcl | |
387 | #endif | |
388 | { | |
389 | va_list ap; | |
390 | #if __STDC__ | |
391 | va_start(ap, fmt); | |
392 | #else | |
393 | va_start(ap); | |
394 | #endif | |
395 | (void)fprintf(stderr, "iostat: "); | |
396 | (void)vfprintf(stderr, fmt, ap); | |
397 | va_end(ap); | |
398 | (void)fprintf(stderr, "\n"); | |
399 | exit(1); | |
400 | /* NOTREACHED */ | |
401 | } |