Commit | Line | Data |
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1e5ba5b5 | 1 | /* Get the system load averages. |
2c30b2fc | 2 | Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995, 1997 |
1e5ba5b5 RM |
3 | Free Software Foundation, Inc. |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2, or (at your option) | |
8 | any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
0468655b KH |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
18 | USA. */ | |
1e5ba5b5 RM |
19 | |
20 | /* Compile-time symbols that this file uses: | |
21 | ||
579c8381 JM |
22 | HAVE_PSTAT_GETDYNAMIC Define this if your system has the |
23 | pstat_getdynamic function. I think it | |
24 | is unique to HPUX9. The best way to get the | |
25 | definition is through the AC_FUNC_GETLOADAVG | |
26 | macro that comes with autoconf 2.13 or newer. | |
27 | If that isn't an option, then just put | |
28 | AC_CHECK_FUNCS(pstat_getdynamic) in your | |
29 | configure.in file. | |
1e5ba5b5 RM |
30 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. |
31 | KERNEL_FILE Pathname of the kernel to nlist. | |
32 | LDAV_CVT() Scale the load average from the kernel. | |
33 | Returns a double. | |
34 | LDAV_SYMBOL Name of kernel symbol giving load average. | |
35 | LOAD_AVE_TYPE Type of the load average array in the kernel. | |
36 | Must be defined unless one of | |
37 | apollo, DGUX, NeXT, or UMAX is defined; | |
102f4b17 | 38 | or we have libkstat; |
1e5ba5b5 RM |
39 | otherwise, no load average is available. |
40 | NLIST_STRUCT Include nlist.h, not a.out.h, and | |
41 | the nlist n_name element is a pointer, | |
42 | not an array. | |
43 | NLIST_NAME_UNION struct nlist has an n_un member, not n_name. | |
22ddf250 | 44 | LINUX_LDAV_FILE [__linux__]: File containing load averages. |
1e5ba5b5 RM |
45 | |
46 | Specific system predefines this file uses, aside from setting | |
47 | default values if not emacs: | |
48 | ||
49 | apollo | |
50 | BSD Real BSD, not just BSD-like. | |
91bf5fad | 51 | convex |
1e5ba5b5 RM |
52 | DGUX |
53 | eunice UNIX emulator under VMS. | |
54 | hpux | |
383ebe49 | 55 | __MSDOS__ No-op for MSDOS. |
1e5ba5b5 RM |
56 | NeXT |
57 | sgi | |
58 | sequent Sequent Dynix 3.x.x (BSD) | |
59 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | |
60 | sony_news NEWS-OS (works at least for 4.1C) | |
61 | UMAX | |
62 | UMAX4_3 | |
63 | VMS | |
383ebe49 | 64 | WINDOWS32 No-op for Windows95/NT. |
22ddf250 | 65 | __linux__ Linux: assumes /proc filesystem mounted. |
1e5ba5b5 | 66 | Support from Michael K. Johnson. |
9eb8034b | 67 | __NetBSD__ NetBSD: assumes /kern filesystem mounted. |
1e5ba5b5 RM |
68 | |
69 | In addition, to avoid nesting many #ifdefs, we internally set | |
70 | LDAV_DONE to indicate that the load average has been computed. | |
71 | ||
72 | We also #define LDAV_PRIVILEGED if a program will require | |
73 | special installation to be able to call getloadavg. */ | |
74 | ||
df3dd7d6 RM |
75 | /* This should always be first. */ |
76 | #ifdef HAVE_CONFIG_H | |
3da4f367 | 77 | # include <config.h> |
df3dd7d6 RM |
78 | #endif |
79 | ||
1e5ba5b5 RM |
80 | #include <sys/types.h> |
81 | ||
82 | /* Both the Emacs and non-Emacs sections want this. Some | |
83 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
84 | sparc.h's) use macros like FSCALE, defined here. */ | |
2b86fcb1 | 85 | #if defined (unix) || defined (__unix) |
3da4f367 | 86 | # include <sys/param.h> |
1e5ba5b5 RM |
87 | #endif |
88 | ||
89 | ||
04402ae3 | 90 | /* Exclude all the code except the test program at the end |
39c5a83f RM |
91 | if the system has its own `getloadavg' function. |
92 | ||
93 | The declaration of `errno' is needed by the test program | |
94 | as well as the function itself, so it comes first. */ | |
95 | ||
96 | #include <errno.h> | |
97 | ||
98 | #ifndef errno | |
99 | extern int errno; | |
100 | #endif | |
04402ae3 RM |
101 | |
102 | #ifndef HAVE_GETLOADAVG | |
103 | ||
104 | ||
1e5ba5b5 RM |
105 | /* The existing Emacs configuration files define a macro called |
106 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
107 | returns the load average multiplied by 100. What we actually want | |
108 | is a macro called LDAV_CVT, which returns the load average as an | |
109 | unmultiplied double. | |
110 | ||
111 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
112 | LOAD_AVE_CVT, but future machine config files should just define | |
113 | LDAV_CVT directly. */ | |
114 | ||
3da4f367 JM |
115 | # if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) |
116 | # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
117 | # endif | |
1e5ba5b5 | 118 | |
3da4f367 | 119 | # if !defined (BSD) && defined (ultrix) |
1e5ba5b5 | 120 | /* Ultrix behaves like BSD on Vaxen. */ |
3da4f367 JM |
121 | # define BSD |
122 | # endif | |
1e5ba5b5 | 123 | |
3da4f367 | 124 | # ifdef NeXT |
1e5ba5b5 RM |
125 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which |
126 | conflicts with the definition understood in this file, that this | |
127 | really is BSD. */ | |
3da4f367 | 128 | # undef BSD |
1e5ba5b5 RM |
129 | |
130 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
131 | defined to mean that the nlist method should be used, which is not true. */ | |
3da4f367 JM |
132 | # undef FSCALE |
133 | # endif | |
1e5ba5b5 | 134 | |
432eec29 RS |
135 | /* Same issues as for NeXT apply to the HURD-based GNU system. */ |
136 | # ifdef __GNU__ | |
137 | # undef BSD | |
138 | # undef FSCALE | |
139 | # endif /* __GNU__ */ | |
140 | ||
1e5ba5b5 RM |
141 | /* Set values that are different from the defaults, which are |
142 | set a little farther down with #ifndef. */ | |
143 | ||
144 | ||
145 | /* Some shorthands. */ | |
146 | ||
3da4f367 JM |
147 | # if defined (HPUX) && !defined (hpux) |
148 | # define hpux | |
149 | # endif | |
1e5ba5b5 | 150 | |
3da4f367 JM |
151 | # if defined (__hpux) && !defined (hpux) |
152 | # define hpux | |
153 | # endif | |
73a46a9c | 154 | |
3da4f367 JM |
155 | # if defined (__sun) && !defined (sun) |
156 | # define sun | |
157 | # endif | |
73a46a9c | 158 | |
3da4f367 JM |
159 | # if defined(hp300) && !defined(hpux) |
160 | # define MORE_BSD | |
161 | # endif | |
1e5ba5b5 | 162 | |
3da4f367 JM |
163 | # if defined(ultrix) && defined(mips) |
164 | # define decstation | |
165 | # endif | |
1e5ba5b5 | 166 | |
3da4f367 JM |
167 | # if defined (__SVR4) && !defined (SVR4) |
168 | # define SVR4 | |
169 | # endif | |
1e5ba5b5 | 170 | |
3da4f367 JM |
171 | # if (defined(sun) && defined(SVR4)) || defined (SOLARIS2) |
172 | # define SUNOS_5 | |
173 | # endif | |
1e5ba5b5 | 174 | |
3da4f367 JM |
175 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
176 | # define OSF_ALPHA | |
e3cbb35e RS |
177 | # include <sys/mbuf.h> |
178 | # include <sys/socket.h> | |
179 | # include <net/route.h> | |
3da4f367 JM |
180 | # include <sys/table.h> |
181 | # endif | |
182 | ||
183 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
184 | # define OSF_MIPS | |
185 | # include <sys/table.h> | |
186 | # endif | |
1e5ba5b5 RM |
187 | |
188 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
189 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
190 | that with a couple of other things and we'll have a unique match. */ | |
3da4f367 JM |
191 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) |
192 | # define tek4300 /* Define by emacs, but not by other users. */ | |
193 | # endif | |
1e5ba5b5 RM |
194 | |
195 | ||
8eda6c51 | 196 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
3da4f367 | 197 | # ifndef LOAD_AVE_TYPE |
5ac622b2 | 198 | |
3da4f367 JM |
199 | # ifdef MORE_BSD |
200 | # define LOAD_AVE_TYPE long | |
201 | # endif | |
8eda6c51 | 202 | |
3da4f367 JM |
203 | # ifdef sun |
204 | # define LOAD_AVE_TYPE long | |
205 | # endif | |
8eda6c51 | 206 | |
3da4f367 JM |
207 | # ifdef decstation |
208 | # define LOAD_AVE_TYPE long | |
209 | # endif | |
8eda6c51 | 210 | |
3da4f367 JM |
211 | # ifdef _SEQUENT_ |
212 | # define LOAD_AVE_TYPE long | |
213 | # endif | |
8eda6c51 | 214 | |
3da4f367 JM |
215 | # ifdef sgi |
216 | # define LOAD_AVE_TYPE long | |
217 | # endif | |
8eda6c51 | 218 | |
3da4f367 JM |
219 | # ifdef SVR4 |
220 | # define LOAD_AVE_TYPE long | |
221 | # endif | |
8eda6c51 | 222 | |
3da4f367 JM |
223 | # ifdef sony_news |
224 | # define LOAD_AVE_TYPE long | |
225 | # endif | |
8eda6c51 | 226 | |
3da4f367 JM |
227 | # ifdef sequent |
228 | # define LOAD_AVE_TYPE long | |
229 | # endif | |
8eda6c51 | 230 | |
3da4f367 JM |
231 | # ifdef OSF_ALPHA |
232 | # define LOAD_AVE_TYPE long | |
233 | # endif | |
8eda6c51 | 234 | |
3da4f367 JM |
235 | # if defined (ardent) && defined (titan) |
236 | # define LOAD_AVE_TYPE long | |
237 | # endif | |
8eda6c51 | 238 | |
3da4f367 JM |
239 | # ifdef tek4300 |
240 | # define LOAD_AVE_TYPE long | |
241 | # endif | |
1e5ba5b5 | 242 | |
3da4f367 JM |
243 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
244 | # define LOAD_AVE_TYPE long | |
245 | # endif | |
59c0e567 | 246 | |
3da4f367 JM |
247 | # ifdef _AIX |
248 | # define LOAD_AVE_TYPE long | |
249 | # endif | |
bc77c95c | 250 | |
3da4f367 JM |
251 | # ifdef convex |
252 | # define LOAD_AVE_TYPE double | |
253 | # ifndef LDAV_CVT | |
254 | # define LDAV_CVT(n) (n) | |
255 | # endif | |
256 | # endif | |
91bf5fad | 257 | |
3da4f367 | 258 | # endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 259 | |
3da4f367 | 260 | # ifdef OSF_ALPHA |
f870f3fe RM |
261 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, |
262 | according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
263 | # undef FSCALE |
264 | # define FSCALE 1024.0 | |
265 | # endif | |
f870f3fe | 266 | |
3da4f367 | 267 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
bf074c06 RM |
268 | /* <sys/param.h> defines an incorrect value for FSCALE on an |
269 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
270 | # undef FSCALE |
271 | # define FSCALE 100.0 | |
272 | # endif | |
bf074c06 | 273 | |
f870f3fe | 274 | |
3da4f367 | 275 | # ifndef FSCALE |
1e5ba5b5 RM |
276 | |
277 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
278 | ||
3da4f367 JM |
279 | # ifdef MORE_BSD |
280 | # define FSCALE 2048.0 | |
281 | # endif | |
1e5ba5b5 | 282 | |
3da4f367 JM |
283 | # if defined(MIPS) || defined(SVR4) || defined(decstation) |
284 | # define FSCALE 256 | |
285 | # endif | |
1e5ba5b5 | 286 | |
3da4f367 | 287 | # if defined (sgi) || defined (sequent) |
934d56b7 RM |
288 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
289 | above under #ifdef MIPS. But we want the sgi value. */ | |
3da4f367 JM |
290 | # undef FSCALE |
291 | # define FSCALE 1000.0 | |
292 | # endif | |
1e5ba5b5 | 293 | |
3da4f367 JM |
294 | # if defined (ardent) && defined (titan) |
295 | # define FSCALE 65536.0 | |
296 | # endif | |
1e5ba5b5 | 297 | |
3da4f367 JM |
298 | # ifdef tek4300 |
299 | # define FSCALE 100.0 | |
300 | # endif | |
59c0e567 | 301 | |
3da4f367 JM |
302 | # ifdef _AIX |
303 | # define FSCALE 65536.0 | |
304 | # endif | |
bc77c95c | 305 | |
3da4f367 | 306 | # endif /* Not FSCALE. */ |
1e5ba5b5 | 307 | |
3da4f367 JM |
308 | # if !defined (LDAV_CVT) && defined (FSCALE) |
309 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) | |
310 | # endif | |
1e5ba5b5 | 311 | |
8eda6c51 | 312 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ |
3da4f367 | 313 | # ifndef NLIST_STRUCT |
8eda6c51 | 314 | |
3da4f367 JM |
315 | # ifdef MORE_BSD |
316 | # define NLIST_STRUCT | |
317 | # endif | |
8eda6c51 | 318 | |
3da4f367 JM |
319 | # ifdef sun |
320 | # define NLIST_STRUCT | |
321 | # endif | |
8eda6c51 | 322 | |
3da4f367 JM |
323 | # ifdef decstation |
324 | # define NLIST_STRUCT | |
325 | # endif | |
8eda6c51 | 326 | |
3da4f367 JM |
327 | # ifdef hpux |
328 | # define NLIST_STRUCT | |
329 | # endif | |
8eda6c51 | 330 | |
3da4f367 JM |
331 | # if defined (_SEQUENT_) || defined (sequent) |
332 | # define NLIST_STRUCT | |
333 | # endif | |
8eda6c51 | 334 | |
3da4f367 JM |
335 | # ifdef sgi |
336 | # define NLIST_STRUCT | |
337 | # endif | |
8eda6c51 | 338 | |
3da4f367 JM |
339 | # ifdef SVR4 |
340 | # define NLIST_STRUCT | |
341 | # endif | |
1e5ba5b5 | 342 | |
3da4f367 JM |
343 | # ifdef sony_news |
344 | # define NLIST_STRUCT | |
345 | # endif | |
8eda6c51 | 346 | |
3da4f367 JM |
347 | # ifdef OSF_ALPHA |
348 | # define NLIST_STRUCT | |
349 | # endif | |
8eda6c51 | 350 | |
3da4f367 JM |
351 | # if defined (ardent) && defined (titan) |
352 | # define NLIST_STRUCT | |
353 | # endif | |
8eda6c51 | 354 | |
3da4f367 JM |
355 | # ifdef tek4300 |
356 | # define NLIST_STRUCT | |
357 | # endif | |
8eda6c51 | 358 | |
3da4f367 JM |
359 | # ifdef butterfly |
360 | # define NLIST_STRUCT | |
361 | # endif | |
8eda6c51 | 362 | |
3da4f367 JM |
363 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
364 | # define NLIST_STRUCT | |
365 | # endif | |
59c0e567 | 366 | |
3da4f367 JM |
367 | # ifdef _AIX |
368 | # define NLIST_STRUCT | |
369 | # endif | |
bc77c95c | 370 | |
3da4f367 | 371 | # endif /* defined (NLIST_STRUCT) */ |
8eda6c51 | 372 | |
1e5ba5b5 | 373 | |
3da4f367 JM |
374 | # if defined(sgi) || (defined(mips) && !defined(BSD)) |
375 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
376 | # endif | |
1e5ba5b5 RM |
377 | |
378 | ||
3da4f367 JM |
379 | # if !defined (KERNEL_FILE) && defined (sequent) |
380 | # define KERNEL_FILE "/dynix" | |
381 | # endif | |
1e5ba5b5 | 382 | |
3da4f367 JM |
383 | # if !defined (KERNEL_FILE) && defined (hpux) |
384 | # define KERNEL_FILE "/hp-ux" | |
385 | # endif | |
1e5ba5b5 | 386 | |
3da4f367 JM |
387 | # if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || (defined (ardent) && defined (titan))) |
388 | # define KERNEL_FILE "/unix" | |
389 | # endif | |
1e5ba5b5 RM |
390 | |
391 | ||
3da4f367 JM |
392 | # if !defined (LDAV_SYMBOL) && defined (alliant) |
393 | # define LDAV_SYMBOL "_Loadavg" | |
394 | # endif | |
1e5ba5b5 | 395 | |
3da4f367 JM |
396 | # if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) |
397 | # define LDAV_SYMBOL "avenrun" | |
398 | # endif | |
1e5ba5b5 | 399 | |
3da4f367 JM |
400 | # ifdef HAVE_UNISTD_H |
401 | # include <unistd.h> | |
402 | # endif | |
1e5ba5b5 | 403 | |
3da4f367 | 404 | # include <stdio.h> |
1e5ba5b5 RM |
405 | |
406 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
407 | nlist method. */ | |
3da4f367 JM |
408 | # if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) |
409 | # define LOAD_AVE_TYPE double | |
410 | # endif | |
411 | ||
412 | # ifdef LOAD_AVE_TYPE | |
413 | ||
414 | # ifndef VMS | |
415 | # ifndef __linux__ | |
416 | # ifndef NLIST_STRUCT | |
417 | # include <a.out.h> | |
418 | # else /* NLIST_STRUCT */ | |
419 | # include <nlist.h> | |
420 | # endif /* NLIST_STRUCT */ | |
421 | ||
422 | # ifdef SUNOS_5 | |
423 | # include <fcntl.h> | |
424 | # include <kvm.h> | |
425 | # include <kstat.h> | |
426 | # endif | |
427 | ||
428 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | |
429 | # include <sys/pstat.h> | |
430 | # endif | |
431 | ||
432 | # ifndef KERNEL_FILE | |
433 | # define KERNEL_FILE "/vmunix" | |
434 | # endif /* KERNEL_FILE */ | |
435 | ||
436 | # ifndef LDAV_SYMBOL | |
437 | # define LDAV_SYMBOL "_avenrun" | |
438 | # endif /* LDAV_SYMBOL */ | |
439 | # endif /* __linux__ */ | |
440 | ||
441 | # else /* VMS */ | |
442 | ||
443 | # ifndef eunice | |
444 | # include <iodef.h> | |
445 | # include <descrip.h> | |
446 | # else /* eunice */ | |
447 | # include <vms/iodef.h> | |
448 | # endif /* eunice */ | |
449 | # endif /* VMS */ | |
450 | ||
451 | # ifndef LDAV_CVT | |
452 | # define LDAV_CVT(n) ((double) (n)) | |
453 | # endif /* !LDAV_CVT */ | |
454 | ||
455 | # endif /* LOAD_AVE_TYPE */ | |
456 | ||
d282be16 RS |
457 | # if defined(__GNU__) && !defined (NeXT) |
458 | /* Note that NeXT Openstep defines __GNU__ even though it should not. */ | |
459 | /* GNU system acts much like NeXT, for load average purposes, | |
460 | but not exactly. */ | |
2c30b2fc MB |
461 | # define NeXT |
462 | # define host_self mach_host_self | |
463 | # endif | |
464 | ||
3da4f367 JM |
465 | # ifdef NeXT |
466 | # ifdef HAVE_MACH_MACH_H | |
467 | # include <mach/mach.h> | |
468 | # else | |
469 | # include <mach.h> | |
470 | # endif | |
471 | # endif /* NeXT */ | |
472 | ||
473 | # ifdef sgi | |
474 | # include <sys/sysmp.h> | |
475 | # endif /* sgi */ | |
476 | ||
477 | # ifdef UMAX | |
478 | # include <stdio.h> | |
479 | # include <signal.h> | |
480 | # include <sys/time.h> | |
481 | # include <sys/wait.h> | |
482 | # include <sys/syscall.h> | |
483 | ||
484 | # ifdef UMAX_43 | |
485 | # include <machine/cpu.h> | |
486 | # include <inq_stats/statistics.h> | |
487 | # include <inq_stats/sysstats.h> | |
488 | # include <inq_stats/cpustats.h> | |
489 | # include <inq_stats/procstats.h> | |
490 | # else /* Not UMAX_43. */ | |
491 | # include <sys/sysdefs.h> | |
492 | # include <sys/statistics.h> | |
493 | # include <sys/sysstats.h> | |
494 | # include <sys/cpudefs.h> | |
495 | # include <sys/cpustats.h> | |
496 | # include <sys/procstats.h> | |
497 | # endif /* Not UMAX_43. */ | |
498 | # endif /* UMAX */ | |
499 | ||
500 | # ifdef DGUX | |
501 | # include <sys/dg_sys_info.h> | |
502 | # endif | |
503 | ||
504 | # if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
505 | # include <fcntl.h> | |
506 | # else | |
507 | # include <sys/file.h> | |
508 | # endif | |
1e5ba5b5 | 509 | \f |
102f4b17 | 510 | |
1e5ba5b5 RM |
511 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ |
512 | ||
3da4f367 | 513 | # ifdef NeXT |
1e5ba5b5 RM |
514 | static processor_set_t default_set; |
515 | static int getloadavg_initialized; | |
3da4f367 | 516 | # endif /* NeXT */ |
1e5ba5b5 | 517 | |
3da4f367 | 518 | # ifdef UMAX |
1e5ba5b5 RM |
519 | static unsigned int cpus = 0; |
520 | static unsigned int samples; | |
3da4f367 | 521 | # endif /* UMAX */ |
1e5ba5b5 | 522 | |
3da4f367 | 523 | # ifdef DGUX |
1e5ba5b5 | 524 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ |
3da4f367 | 525 | # endif /* DGUX */ |
1e5ba5b5 | 526 | |
102f4b17 | 527 | #if !defined(HAVE_LIBKSTAT) && defined(LOAD_AVE_TYPE) |
1e5ba5b5 RM |
528 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ |
529 | static int channel; | |
530 | /* Nonzero iff channel is valid. */ | |
531 | static int getloadavg_initialized; | |
532 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
533 | static long offset; | |
534 | ||
102f4b17 | 535 | #if !defined(VMS) && !defined(sgi) && !defined(__linux__) |
1e5ba5b5 | 536 | static struct nlist nl[2]; |
432eec29 | 537 | #endif /* Not VMS or sgi */ |
1e5ba5b5 | 538 | |
102f4b17 | 539 | #ifdef SUNOS_5 |
1e5ba5b5 | 540 | static kvm_t *kd; |
102f4b17 | 541 | #endif /* SUNOS_5 */ |
1e5ba5b5 | 542 | |
432eec29 | 543 | #endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ |
1e5ba5b5 RM |
544 | \f |
545 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
546 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 547 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
548 | or -1 if an error occurred. */ |
549 | ||
550 | int | |
551 | getloadavg (loadavg, nelem) | |
552 | double loadavg[]; | |
553 | int nelem; | |
554 | { | |
555 | int elem = 0; /* Return value. */ | |
556 | ||
3da4f367 JM |
557 | # ifdef NO_GET_LOAD_AVG |
558 | # define LDAV_DONE | |
7ee260fe RM |
559 | /* Set errno to zero to indicate that there was no particular error; |
560 | this function just can't work at all on this system. */ | |
561 | errno = 0; | |
562 | elem = -1; | |
3da4f367 | 563 | # endif |
7ee260fe | 564 | |
6b2e9efd | 565 | # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) |
4e98d4fa | 566 | /* Use libkstat because we don't have to be root. */ |
3da4f367 | 567 | # define LDAV_DONE |
4e98d4fa RS |
568 | kstat_ctl_t *kc; |
569 | kstat_t *ksp; | |
570 | kstat_named_t *kn; | |
571 | ||
572 | kc = kstat_open (); | |
3da4f367 JM |
573 | if (kc == 0) |
574 | return -1; | |
4e98d4fa | 575 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); |
3da4f367 JM |
576 | if (ksp == 0 ) |
577 | return -1; | |
578 | if (kstat_read (kc, ksp, 0) == -1) | |
579 | return -1; | |
73a46a9c | 580 | |
4e98d4fa RS |
581 | |
582 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
583 | if (kn == 0) | |
584 | { | |
585 | /* Return -1 if no load average information is available. */ | |
586 | nelem = 0; | |
587 | elem = -1; | |
588 | } | |
589 | ||
590 | if (nelem >= 1) | |
591 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
592 | ||
593 | if (nelem >= 2) | |
594 | { | |
595 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
596 | if (kn != 0) | |
597 | { | |
598 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
599 | ||
600 | if (nelem >= 3) | |
601 | { | |
602 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | |
603 | if (kn != 0) | |
604 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
605 | } | |
606 | } | |
607 | } | |
608 | ||
609 | kstat_close (kc); | |
6b2e9efd | 610 | # endif /* HAVE_LIBKSTAT */ |
4e98d4fa | 611 | |
3da4f367 JM |
612 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
613 | /* Use pstat_getdynamic() because we don't have to be root. */ | |
614 | # define LDAV_DONE | |
615 | # undef LOAD_AVE_TYPE | |
1e5ba5b5 | 616 | |
3da4f367 JM |
617 | struct pst_dynamic dyn_info; |
618 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | |
619 | return -1; | |
620 | if (nelem > 0) | |
621 | loadavg[elem++] = dyn_info.psd_avg_1_min; | |
622 | if (nelem > 1) | |
623 | loadavg[elem++] = dyn_info.psd_avg_5_min; | |
624 | if (nelem > 2) | |
625 | loadavg[elem++] = dyn_info.psd_avg_15_min; | |
626 | ||
627 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | |
628 | ||
629 | # if !defined (LDAV_DONE) && defined (__linux__) | |
630 | # define LDAV_DONE | |
631 | # undef LOAD_AVE_TYPE | |
632 | ||
633 | # ifndef LINUX_LDAV_FILE | |
634 | # define LINUX_LDAV_FILE "/proc/loadavg" | |
635 | # endif | |
1e5ba5b5 RM |
636 | |
637 | char ldavgbuf[40]; | |
638 | double load_ave[3]; | |
639 | int fd, count; | |
640 | ||
641 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
642 | if (fd == -1) | |
643 | return -1; | |
644 | count = read (fd, ldavgbuf, 40); | |
645 | (void) close (fd); | |
646 | if (count <= 0) | |
647 | return -1; | |
648 | ||
649 | count = sscanf (ldavgbuf, "%lf %lf %lf", | |
650 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
651 | if (count < 1) | |
652 | return -1; | |
653 | ||
654 | for (elem = 0; elem < nelem && elem < count; elem++) | |
655 | loadavg[elem] = load_ave[elem]; | |
656 | ||
657 | return elem; | |
658 | ||
3da4f367 | 659 | # endif /* __linux__ */ |
1e5ba5b5 | 660 | |
3da4f367 JM |
661 | # if !defined (LDAV_DONE) && defined (__NetBSD__) |
662 | # define LDAV_DONE | |
663 | # undef LOAD_AVE_TYPE | |
9eb8034b | 664 | |
3da4f367 JM |
665 | # ifndef NETBSD_LDAV_FILE |
666 | # define NETBSD_LDAV_FILE "/kern/loadavg" | |
667 | # endif | |
9eb8034b RM |
668 | |
669 | unsigned long int load_ave[3], scale; | |
670 | int count; | |
671 | FILE *fp; | |
672 | ||
8f090e85 | 673 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
674 | if (fp == NULL) |
675 | return -1; | |
676 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
677 | &load_ave[0], &load_ave[1], &load_ave[2], | |
678 | &scale); | |
679 | (void) fclose (fp); | |
680 | if (count != 4) | |
681 | return -1; | |
682 | ||
683 | for (elem = 0; elem < nelem; elem++) | |
684 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
685 | ||
686 | return elem; | |
687 | ||
3da4f367 | 688 | # endif /* __NetBSD__ */ |
9eb8034b | 689 | |
3da4f367 JM |
690 | # if !defined (LDAV_DONE) && defined (NeXT) |
691 | # define LDAV_DONE | |
1e5ba5b5 RM |
692 | /* The NeXT code was adapted from iscreen 3.2. */ |
693 | ||
694 | host_t host; | |
695 | struct processor_set_basic_info info; | |
696 | unsigned info_count; | |
697 | ||
039e9c8b DM |
698 | /* We only know how to get the 1-minute average for this system, |
699 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
700 | |
701 | if (!getloadavg_initialized) | |
702 | { | |
703 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
704 | getloadavg_initialized = 1; | |
705 | } | |
706 | ||
707 | if (getloadavg_initialized) | |
708 | { | |
709 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
710 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
3da4f367 | 711 | (processor_set_info_t) &info, &info_count) |
1e5ba5b5 RM |
712 | != KERN_SUCCESS) |
713 | getloadavg_initialized = 0; | |
714 | else | |
715 | { | |
716 | if (nelem > 0) | |
717 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
718 | } | |
719 | } | |
720 | ||
721 | if (!getloadavg_initialized) | |
722 | return -1; | |
3da4f367 | 723 | # endif /* NeXT */ |
1e5ba5b5 | 724 | |
3da4f367 JM |
725 | # if !defined (LDAV_DONE) && defined (UMAX) |
726 | # define LDAV_DONE | |
1e5ba5b5 RM |
727 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not |
728 | have a /dev/kmem. Information about the workings of the running kernel | |
729 | can be gathered with inq_stats system calls. | |
730 | We only know how to get the 1-minute average for this system. */ | |
731 | ||
732 | struct proc_summary proc_sum_data; | |
733 | struct stat_descr proc_info; | |
734 | double load; | |
735 | register unsigned int i, j; | |
736 | ||
737 | if (cpus == 0) | |
738 | { | |
739 | register unsigned int c, i; | |
740 | struct cpu_config conf; | |
741 | struct stat_descr desc; | |
742 | ||
743 | desc.sd_next = 0; | |
744 | desc.sd_subsys = SUBSYS_CPU; | |
745 | desc.sd_type = CPUTYPE_CONFIG; | |
746 | desc.sd_addr = (char *) &conf; | |
747 | desc.sd_size = sizeof conf; | |
748 | ||
749 | if (inq_stats (1, &desc)) | |
750 | return -1; | |
751 | ||
752 | c = 0; | |
753 | for (i = 0; i < conf.config_maxclass; ++i) | |
754 | { | |
755 | struct class_stats stats; | |
756 | bzero ((char *) &stats, sizeof stats); | |
757 | ||
758 | desc.sd_type = CPUTYPE_CLASS; | |
759 | desc.sd_objid = i; | |
760 | desc.sd_addr = (char *) &stats; | |
761 | desc.sd_size = sizeof stats; | |
762 | ||
763 | if (inq_stats (1, &desc)) | |
764 | return -1; | |
765 | ||
766 | c += stats.class_numcpus; | |
767 | } | |
768 | cpus = c; | |
769 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
770 | } | |
771 | ||
772 | proc_info.sd_next = 0; | |
773 | proc_info.sd_subsys = SUBSYS_PROC; | |
774 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
775 | proc_info.sd_addr = (char *) &proc_sum_data; | |
776 | proc_info.sd_size = sizeof (struct proc_summary); | |
777 | proc_info.sd_sizeused = 0; | |
778 | ||
779 | if (inq_stats (1, &proc_info) != 0) | |
780 | return -1; | |
781 | ||
782 | load = proc_sum_data.ps_nrunnable; | |
783 | j = 0; | |
784 | for (i = samples - 1; i > 0; --i) | |
785 | { | |
786 | load += proc_sum_data.ps_nrun[j]; | |
787 | if (j++ == PS_NRUNSIZE) | |
788 | j = 0; | |
789 | } | |
790 | ||
791 | if (nelem > 0) | |
792 | loadavg[elem++] = load / samples / cpus; | |
3da4f367 | 793 | # endif /* UMAX */ |
1e5ba5b5 | 794 | |
3da4f367 JM |
795 | # if !defined (LDAV_DONE) && defined (DGUX) |
796 | # define LDAV_DONE | |
1e5ba5b5 RM |
797 | /* This call can return -1 for an error, but with good args |
798 | it's not supposed to fail. The first argument is for no | |
799 | apparent reason of type `long int *'. */ | |
800 | dg_sys_info ((long int *) &load_info, | |
801 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
802 | DG_SYS_INFO_LOAD_VERSION_0); | |
803 | ||
804 | if (nelem > 0) | |
805 | loadavg[elem++] = load_info.one_minute; | |
806 | if (nelem > 1) | |
807 | loadavg[elem++] = load_info.five_minute; | |
808 | if (nelem > 2) | |
809 | loadavg[elem++] = load_info.fifteen_minute; | |
3da4f367 | 810 | # endif /* DGUX */ |
1e5ba5b5 | 811 | |
3da4f367 JM |
812 | # if !defined (LDAV_DONE) && defined (apollo) |
813 | # define LDAV_DONE | |
1e5ba5b5 RM |
814 | /* Apollo code from lisch@mentorg.com (Ray Lischner). |
815 | ||
816 | This system call is not documented. The load average is obtained as | |
817 | three long integers, for the load average over the past minute, | |
818 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
819 | with 16 bits of integer part and 16 bits of fraction part. | |
820 | ||
821 | I'm not sure which operating system first supported this system call, | |
822 | but I know that SR10.2 supports it. */ | |
823 | ||
824 | extern void proc1_$get_loadav (); | |
825 | unsigned long load_ave[3]; | |
826 | ||
827 | proc1_$get_loadav (load_ave); | |
828 | ||
829 | if (nelem > 0) | |
830 | loadavg[elem++] = load_ave[0] / 65536.0; | |
831 | if (nelem > 1) | |
832 | loadavg[elem++] = load_ave[1] / 65536.0; | |
833 | if (nelem > 2) | |
834 | loadavg[elem++] = load_ave[2] / 65536.0; | |
3da4f367 | 835 | # endif /* apollo */ |
1e5ba5b5 | 836 | |
3da4f367 JM |
837 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) |
838 | # define LDAV_DONE | |
1e5ba5b5 RM |
839 | |
840 | struct tbl_loadavg load_ave; | |
841 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
842 | loadavg[elem++] |
843 | = (load_ave.tl_lscale == 0 | |
844 | ? load_ave.tl_avenrun.d[0] | |
845 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
3da4f367 | 846 | # endif /* OSF_MIPS */ |
1e5ba5b5 | 847 | |
383ebe49 | 848 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) |
3da4f367 | 849 | # define LDAV_DONE |
a7ee71e8 RS |
850 | |
851 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
26ff97e7 | 852 | for ( ; elem < nelem; elem++) |
a7ee71e8 RS |
853 | { |
854 | loadavg[elem] = 0.0; | |
855 | } | |
383ebe49 | 856 | # endif /* __MSDOS__ || WINDOWS32 */ |
a7ee71e8 | 857 | |
3da4f367 JM |
858 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) |
859 | # define LDAV_DONE | |
bbd619d7 RS |
860 | |
861 | struct tbl_loadavg load_ave; | |
862 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
863 | for (elem = 0; elem < nelem; elem++) | |
864 | loadavg[elem] | |
865 | = (load_ave.tl_lscale == 0 | |
866 | ? load_ave.tl_avenrun.d[elem] | |
867 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
3da4f367 | 868 | # endif /* OSF_ALPHA */ |
bbd619d7 | 869 | |
3da4f367 | 870 | # if !defined (LDAV_DONE) && defined (VMS) |
1e5ba5b5 RM |
871 | /* VMS specific code -- read from the Load Ave driver. */ |
872 | ||
873 | LOAD_AVE_TYPE load_ave[3]; | |
874 | static int getloadavg_initialized = 0; | |
3da4f367 | 875 | # ifdef eunice |
1e5ba5b5 RM |
876 | struct |
877 | { | |
878 | int dsc$w_length; | |
879 | char *dsc$a_pointer; | |
880 | } descriptor; | |
3da4f367 | 881 | # endif |
1e5ba5b5 RM |
882 | |
883 | /* Ensure that there is a channel open to the load ave device. */ | |
884 | if (!getloadavg_initialized) | |
885 | { | |
886 | /* Attempt to open the channel. */ | |
3da4f367 | 887 | # ifdef eunice |
1e5ba5b5 RM |
888 | descriptor.dsc$w_length = 18; |
889 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
3da4f367 | 890 | # else |
1e5ba5b5 | 891 | $DESCRIPTOR (descriptor, "LAV0:"); |
3da4f367 | 892 | # endif |
1e5ba5b5 RM |
893 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) |
894 | getloadavg_initialized = 1; | |
895 | } | |
896 | ||
897 | /* Read the load average vector. */ | |
898 | if (getloadavg_initialized | |
899 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
900 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
901 | { | |
902 | sys$dassgn (channel); | |
903 | getloadavg_initialized = 0; | |
904 | } | |
905 | ||
906 | if (!getloadavg_initialized) | |
907 | return -1; | |
3da4f367 | 908 | # endif /* VMS */ |
1e5ba5b5 | 909 | |
3da4f367 | 910 | # if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) |
1e5ba5b5 RM |
911 | |
912 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
913 | ||
3da4f367 | 914 | # define LDAV_PRIVILEGED /* This code requires special installation. */ |
1e5ba5b5 RM |
915 | |
916 | LOAD_AVE_TYPE load_ave[3]; | |
917 | ||
918 | /* Get the address of LDAV_SYMBOL. */ | |
919 | if (offset == 0) | |
920 | { | |
3da4f367 JM |
921 | # ifndef sgi |
922 | # ifndef NLIST_STRUCT | |
1e5ba5b5 RM |
923 | strcpy (nl[0].n_name, LDAV_SYMBOL); |
924 | strcpy (nl[1].n_name, ""); | |
3da4f367 JM |
925 | # else /* NLIST_STRUCT */ |
926 | # ifdef NLIST_NAME_UNION | |
1e5ba5b5 RM |
927 | nl[0].n_un.n_name = LDAV_SYMBOL; |
928 | nl[1].n_un.n_name = 0; | |
3da4f367 | 929 | # else /* not NLIST_NAME_UNION */ |
1e5ba5b5 RM |
930 | nl[0].n_name = LDAV_SYMBOL; |
931 | nl[1].n_name = 0; | |
3da4f367 JM |
932 | # endif /* not NLIST_NAME_UNION */ |
933 | # endif /* NLIST_STRUCT */ | |
1e5ba5b5 | 934 | |
3da4f367 | 935 | # ifndef SUNOS_5 |
bc77c95c | 936 | if ( |
3da4f367 | 937 | # if !(defined (_AIX) && !defined (ps2)) |
bc77c95c | 938 | nlist (KERNEL_FILE, nl) |
3da4f367 | 939 | # else /* _AIX */ |
bc77c95c | 940 | knlist (nl, 1, sizeof (nl[0])) |
3da4f367 | 941 | # endif |
bc77c95c RM |
942 | >= 0) |
943 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | |
944 | { | |
3da4f367 | 945 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR |
bc77c95c | 946 | FIXUP_KERNEL_SYMBOL_ADDR (nl); |
3da4f367 | 947 | # endif |
bc77c95c RM |
948 | offset = nl[0].n_value; |
949 | } | |
3da4f367 JM |
950 | # endif /* !SUNOS_5 */ |
951 | # else /* sgi */ | |
952 | int ldav_off; | |
953 | ||
954 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | |
955 | if (ldav_off != -1) | |
956 | offset = (long) ldav_off & 0x7fffffff; | |
957 | # endif /* sgi */ | |
958 | } | |
1e5ba5b5 RM |
959 | |
960 | /* Make sure we have /dev/kmem open. */ | |
961 | if (!getloadavg_initialized) | |
962 | { | |
3da4f367 | 963 | # ifndef SUNOS_5 |
1e5ba5b5 RM |
964 | channel = open ("/dev/kmem", 0); |
965 | if (channel >= 0) | |
00f7bd72 RM |
966 | { |
967 | /* Set the channel to close on exec, so it does not | |
968 | litter any child's descriptor table. */ | |
071b0719 | 969 | # ifdef F_SETFD |
3da4f367 JM |
970 | # ifndef FD_CLOEXEC |
971 | # define FD_CLOEXEC 1 | |
972 | # endif | |
00f7bd72 | 973 | (void) fcntl (channel, F_SETFD, FD_CLOEXEC); |
3da4f367 | 974 | # endif |
00f7bd72 RM |
975 | getloadavg_initialized = 1; |
976 | } | |
3da4f367 | 977 | # else /* SUNOS_5 */ |
fb3ebe6c DM |
978 | /* We pass 0 for the kernel, corefile, and swapfile names |
979 | to use the currently running kernel. */ | |
1e5ba5b5 | 980 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
26ff97e7 | 981 | if (kd != 0) |
1e5ba5b5 | 982 | { |
fb3ebe6c | 983 | /* nlist the currently running kernel. */ |
1e5ba5b5 | 984 | kvm_nlist (kd, nl); |
fb3ebe6c | 985 | offset = nl[0].n_value; |
1e5ba5b5 RM |
986 | getloadavg_initialized = 1; |
987 | } | |
3da4f367 | 988 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
989 | } |
990 | ||
991 | /* If we can, get the load average values. */ | |
992 | if (offset && getloadavg_initialized) | |
993 | { | |
994 | /* Try to read the load. */ | |
3da4f367 | 995 | # ifndef SUNOS_5 |
1e5ba5b5 RM |
996 | if (lseek (channel, offset, 0) == -1L |
997 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
998 | != sizeof (load_ave)) | |
999 | { | |
1000 | close (channel); | |
1001 | getloadavg_initialized = 0; | |
1002 | } | |
3da4f367 | 1003 | # else /* SUNOS_5 */ |
1e5ba5b5 RM |
1004 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) |
1005 | != sizeof (load_ave)) | |
1006 | { | |
1007 | kvm_close (kd); | |
1008 | getloadavg_initialized = 0; | |
1009 | } | |
3da4f367 | 1010 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
1011 | } |
1012 | ||
1013 | if (offset == 0 || !getloadavg_initialized) | |
1014 | return -1; | |
3da4f367 | 1015 | # endif /* LOAD_AVE_TYPE and not VMS */ |
1e5ba5b5 | 1016 | |
3da4f367 | 1017 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ |
1e5ba5b5 RM |
1018 | if (nelem > 0) |
1019 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
1020 | if (nelem > 1) | |
1021 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
1022 | if (nelem > 2) | |
1023 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
1024 | ||
3da4f367 JM |
1025 | # define LDAV_DONE |
1026 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
1e5ba5b5 | 1027 | |
3da4f367 | 1028 | # ifdef LDAV_DONE |
1e5ba5b5 | 1029 | return elem; |
3da4f367 | 1030 | # else |
1e5ba5b5 RM |
1031 | /* Set errno to zero to indicate that there was no particular error; |
1032 | this function just can't work at all on this system. */ | |
1033 | errno = 0; | |
1034 | return -1; | |
3da4f367 | 1035 | # endif |
1e5ba5b5 | 1036 | } |
04402ae3 RM |
1037 | |
1038 | #endif /* ! HAVE_GETLOADAVG */ | |
1e5ba5b5 RM |
1039 | \f |
1040 | #ifdef TEST | |
75c0d095 | 1041 | int |
1e5ba5b5 RM |
1042 | main (argc, argv) |
1043 | int argc; | |
1044 | char **argv; | |
1045 | { | |
1046 | int naptime = 0; | |
1047 | ||
1048 | if (argc > 1) | |
1049 | naptime = atoi (argv[1]); | |
1050 | ||
1e5ba5b5 RM |
1051 | while (1) |
1052 | { | |
1053 | double avg[3]; | |
1054 | int loads; | |
1055 | ||
1056 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
1057 | loads = getloadavg (avg, 3); | |
1058 | if (loads == -1) | |
1059 | { | |
1060 | perror ("Error getting load average"); | |
1061 | exit (1); | |
1062 | } | |
1063 | if (loads > 0) | |
1064 | printf ("1-minute: %f ", avg[0]); | |
1065 | if (loads > 1) | |
1066 | printf ("5-minute: %f ", avg[1]); | |
1067 | if (loads > 2) | |
1068 | printf ("15-minute: %f ", avg[2]); | |
1069 | if (loads > 0) | |
1070 | putchar ('\n'); | |
db6730c7 RM |
1071 | |
1072 | if (naptime == 0) | |
1073 | break; | |
1e5ba5b5 RM |
1074 | sleep (naptime); |
1075 | } | |
db6730c7 RM |
1076 | |
1077 | exit (0); | |
1e5ba5b5 RM |
1078 | } |
1079 | #endif /* TEST */ |