Commit | Line | Data |
---|---|---|
1e5ba5b5 | 1 | /* Get the system load averages. |
0b5538bd | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, |
0a64641e | 3 | 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
429ab54e | 4 | Free Software Foundation, Inc. |
1e5ba5b5 | 5 | |
87c35974 DL |
6 | NOTE: The canonical source of this file is maintained with gnulib. |
7 | Bugs can be reported to bug-gnulib@gnu.org. | |
8 | ||
1e5ba5b5 RM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
4fc5845f | 21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
0468655b | 22 | USA. */ |
1e5ba5b5 RM |
23 | |
24 | /* Compile-time symbols that this file uses: | |
25 | ||
579c8381 JM |
26 | HAVE_PSTAT_GETDYNAMIC Define this if your system has the |
27 | pstat_getdynamic function. I think it | |
28 | is unique to HPUX9. The best way to get the | |
29 | definition is through the AC_FUNC_GETLOADAVG | |
30 | macro that comes with autoconf 2.13 or newer. | |
31 | If that isn't an option, then just put | |
32 | AC_CHECK_FUNCS(pstat_getdynamic) in your | |
33 | configure.in file. | |
1e5ba5b5 RM |
34 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. |
35 | KERNEL_FILE Pathname of the kernel to nlist. | |
36 | LDAV_CVT() Scale the load average from the kernel. | |
37 | Returns a double. | |
38 | LDAV_SYMBOL Name of kernel symbol giving load average. | |
39 | LOAD_AVE_TYPE Type of the load average array in the kernel. | |
40 | Must be defined unless one of | |
41 | apollo, DGUX, NeXT, or UMAX is defined; | |
102f4b17 | 42 | or we have libkstat; |
1e5ba5b5 | 43 | otherwise, no load average is available. |
87c35974 DL |
44 | HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults |
45 | to this. | |
1e5ba5b5 RM |
46 | NLIST_STRUCT Include nlist.h, not a.out.h, and |
47 | the nlist n_name element is a pointer, | |
48 | not an array. | |
87c35974 | 49 | HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'. |
22ddf250 | 50 | LINUX_LDAV_FILE [__linux__]: File containing load averages. |
87c35974 DL |
51 | HAVE_LOCALE_H locale.h is available. |
52 | HAVE_SETLOCALE The `setlocale' function is available. | |
1e5ba5b5 RM |
53 | |
54 | Specific system predefines this file uses, aside from setting | |
55 | default values if not emacs: | |
56 | ||
57 | apollo | |
58 | BSD Real BSD, not just BSD-like. | |
91bf5fad | 59 | convex |
1e5ba5b5 RM |
60 | DGUX |
61 | eunice UNIX emulator under VMS. | |
62 | hpux | |
383ebe49 | 63 | __MSDOS__ No-op for MSDOS. |
1e5ba5b5 RM |
64 | NeXT |
65 | sgi | |
66 | sequent Sequent Dynix 3.x.x (BSD) | |
67 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | |
68 | sony_news NEWS-OS (works at least for 4.1C) | |
69 | UMAX | |
70 | UMAX4_3 | |
71 | VMS | |
383ebe49 | 72 | WINDOWS32 No-op for Windows95/NT. |
22ddf250 | 73 | __linux__ Linux: assumes /proc filesystem mounted. |
1e5ba5b5 | 74 | Support from Michael K. Johnson. |
9eb8034b | 75 | __NetBSD__ NetBSD: assumes /kern filesystem mounted. |
1e5ba5b5 RM |
76 | |
77 | In addition, to avoid nesting many #ifdefs, we internally set | |
78 | LDAV_DONE to indicate that the load average has been computed. | |
79 | ||
80 | We also #define LDAV_PRIVILEGED if a program will require | |
81 | special installation to be able to call getloadavg. */ | |
82 | ||
df3dd7d6 RM |
83 | /* This should always be first. */ |
84 | #ifdef HAVE_CONFIG_H | |
3da4f367 | 85 | # include <config.h> |
df3dd7d6 RM |
86 | #endif |
87 | ||
1e5ba5b5 RM |
88 | #include <sys/types.h> |
89 | ||
90 | /* Both the Emacs and non-Emacs sections want this. Some | |
91 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
92 | sparc.h's) use macros like FSCALE, defined here. */ | |
2b86fcb1 | 93 | #if defined (unix) || defined (__unix) |
3da4f367 | 94 | # include <sys/param.h> |
1e5ba5b5 RM |
95 | #endif |
96 | ||
97 | ||
04402ae3 | 98 | /* Exclude all the code except the test program at the end |
39c5a83f RM |
99 | if the system has its own `getloadavg' function. |
100 | ||
101 | The declaration of `errno' is needed by the test program | |
102 | as well as the function itself, so it comes first. */ | |
103 | ||
104 | #include <errno.h> | |
105 | ||
106 | #ifndef errno | |
107 | extern int errno; | |
108 | #endif | |
04402ae3 | 109 | |
87c35974 DL |
110 | #ifdef HAVE_LOCALE_H |
111 | # include <locale.h> | |
112 | #endif | |
113 | #ifndef HAVE_SETLOCALE | |
114 | # define setlocale(Category, Locale) /* empty */ | |
115 | #endif | |
04402ae3 | 116 | |
87c35974 | 117 | #ifndef HAVE_GETLOADAVG |
04402ae3 | 118 | |
1e5ba5b5 RM |
119 | /* The existing Emacs configuration files define a macro called |
120 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
121 | returns the load average multiplied by 100. What we actually want | |
122 | is a macro called LDAV_CVT, which returns the load average as an | |
123 | unmultiplied double. | |
124 | ||
125 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
126 | LOAD_AVE_CVT, but future machine config files should just define | |
127 | LDAV_CVT directly. */ | |
128 | ||
3da4f367 JM |
129 | # if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) |
130 | # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
131 | # endif | |
1e5ba5b5 | 132 | |
3da4f367 | 133 | # if !defined (BSD) && defined (ultrix) |
1e5ba5b5 | 134 | /* Ultrix behaves like BSD on Vaxen. */ |
3da4f367 JM |
135 | # define BSD |
136 | # endif | |
1e5ba5b5 | 137 | |
3da4f367 | 138 | # ifdef NeXT |
1e5ba5b5 RM |
139 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which |
140 | conflicts with the definition understood in this file, that this | |
141 | really is BSD. */ | |
3da4f367 | 142 | # undef BSD |
1e5ba5b5 RM |
143 | |
144 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
145 | defined to mean that the nlist method should be used, which is not true. */ | |
3da4f367 JM |
146 | # undef FSCALE |
147 | # endif | |
1e5ba5b5 | 148 | |
432eec29 RS |
149 | /* Same issues as for NeXT apply to the HURD-based GNU system. */ |
150 | # ifdef __GNU__ | |
151 | # undef BSD | |
152 | # undef FSCALE | |
153 | # endif /* __GNU__ */ | |
154 | ||
1e5ba5b5 RM |
155 | /* Set values that are different from the defaults, which are |
156 | set a little farther down with #ifndef. */ | |
157 | ||
158 | ||
159 | /* Some shorthands. */ | |
160 | ||
3da4f367 JM |
161 | # if defined (HPUX) && !defined (hpux) |
162 | # define hpux | |
163 | # endif | |
1e5ba5b5 | 164 | |
3da4f367 JM |
165 | # if defined (__hpux) && !defined (hpux) |
166 | # define hpux | |
167 | # endif | |
73a46a9c | 168 | |
3da4f367 JM |
169 | # if defined (__sun) && !defined (sun) |
170 | # define sun | |
171 | # endif | |
73a46a9c | 172 | |
3da4f367 JM |
173 | # if defined(hp300) && !defined(hpux) |
174 | # define MORE_BSD | |
175 | # endif | |
1e5ba5b5 | 176 | |
3da4f367 JM |
177 | # if defined(ultrix) && defined(mips) |
178 | # define decstation | |
179 | # endif | |
1e5ba5b5 | 180 | |
3da4f367 JM |
181 | # if defined (__SVR4) && !defined (SVR4) |
182 | # define SVR4 | |
183 | # endif | |
1e5ba5b5 | 184 | |
3da4f367 JM |
185 | # if (defined(sun) && defined(SVR4)) || defined (SOLARIS2) |
186 | # define SUNOS_5 | |
187 | # endif | |
1e5ba5b5 | 188 | |
3da4f367 JM |
189 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
190 | # define OSF_ALPHA | |
e3cbb35e RS |
191 | # include <sys/mbuf.h> |
192 | # include <sys/socket.h> | |
193 | # include <net/route.h> | |
3da4f367 JM |
194 | # include <sys/table.h> |
195 | # endif | |
196 | ||
197 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
198 | # define OSF_MIPS | |
199 | # include <sys/table.h> | |
200 | # endif | |
1e5ba5b5 RM |
201 | |
202 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
203 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
204 | that with a couple of other things and we'll have a unique match. */ | |
3da4f367 JM |
205 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) |
206 | # define tek4300 /* Define by emacs, but not by other users. */ | |
207 | # endif | |
1e5ba5b5 RM |
208 | |
209 | ||
8eda6c51 | 210 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
3da4f367 | 211 | # ifndef LOAD_AVE_TYPE |
5ac622b2 | 212 | |
3da4f367 JM |
213 | # ifdef MORE_BSD |
214 | # define LOAD_AVE_TYPE long | |
215 | # endif | |
8eda6c51 | 216 | |
3da4f367 JM |
217 | # ifdef sun |
218 | # define LOAD_AVE_TYPE long | |
219 | # endif | |
8eda6c51 | 220 | |
3da4f367 JM |
221 | # ifdef decstation |
222 | # define LOAD_AVE_TYPE long | |
223 | # endif | |
8eda6c51 | 224 | |
3da4f367 JM |
225 | # ifdef _SEQUENT_ |
226 | # define LOAD_AVE_TYPE long | |
227 | # endif | |
8eda6c51 | 228 | |
3da4f367 JM |
229 | # ifdef sgi |
230 | # define LOAD_AVE_TYPE long | |
231 | # endif | |
8eda6c51 | 232 | |
3da4f367 JM |
233 | # ifdef SVR4 |
234 | # define LOAD_AVE_TYPE long | |
235 | # endif | |
8eda6c51 | 236 | |
3da4f367 JM |
237 | # ifdef sony_news |
238 | # define LOAD_AVE_TYPE long | |
239 | # endif | |
8eda6c51 | 240 | |
3da4f367 JM |
241 | # ifdef sequent |
242 | # define LOAD_AVE_TYPE long | |
243 | # endif | |
8eda6c51 | 244 | |
3da4f367 JM |
245 | # ifdef OSF_ALPHA |
246 | # define LOAD_AVE_TYPE long | |
247 | # endif | |
8eda6c51 | 248 | |
3da4f367 JM |
249 | # if defined (ardent) && defined (titan) |
250 | # define LOAD_AVE_TYPE long | |
251 | # endif | |
8eda6c51 | 252 | |
3da4f367 JM |
253 | # ifdef tek4300 |
254 | # define LOAD_AVE_TYPE long | |
255 | # endif | |
1e5ba5b5 | 256 | |
3da4f367 JM |
257 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
258 | # define LOAD_AVE_TYPE long | |
259 | # endif | |
59c0e567 | 260 | |
3da4f367 JM |
261 | # ifdef _AIX |
262 | # define LOAD_AVE_TYPE long | |
263 | # endif | |
bc77c95c | 264 | |
3da4f367 JM |
265 | # ifdef convex |
266 | # define LOAD_AVE_TYPE double | |
267 | # ifndef LDAV_CVT | |
268 | # define LDAV_CVT(n) (n) | |
269 | # endif | |
270 | # endif | |
91bf5fad | 271 | |
3da4f367 | 272 | # endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 273 | |
3da4f367 | 274 | # ifdef OSF_ALPHA |
f870f3fe RM |
275 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, |
276 | according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
277 | # undef FSCALE |
278 | # define FSCALE 1024.0 | |
279 | # endif | |
f870f3fe | 280 | |
3da4f367 | 281 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
bf074c06 RM |
282 | /* <sys/param.h> defines an incorrect value for FSCALE on an |
283 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
284 | # undef FSCALE |
285 | # define FSCALE 100.0 | |
286 | # endif | |
bf074c06 | 287 | |
f870f3fe | 288 | |
3da4f367 | 289 | # ifndef FSCALE |
1e5ba5b5 RM |
290 | |
291 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
292 | ||
3da4f367 JM |
293 | # ifdef MORE_BSD |
294 | # define FSCALE 2048.0 | |
295 | # endif | |
1e5ba5b5 | 296 | |
3da4f367 JM |
297 | # if defined(MIPS) || defined(SVR4) || defined(decstation) |
298 | # define FSCALE 256 | |
299 | # endif | |
1e5ba5b5 | 300 | |
3da4f367 | 301 | # if defined (sgi) || defined (sequent) |
934d56b7 RM |
302 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
303 | above under #ifdef MIPS. But we want the sgi value. */ | |
3da4f367 | 304 | # undef FSCALE |
87c35974 | 305 | # define FSCALE 1000.0 |
3da4f367 | 306 | # endif |
1e5ba5b5 | 307 | |
3da4f367 JM |
308 | # if defined (ardent) && defined (titan) |
309 | # define FSCALE 65536.0 | |
310 | # endif | |
1e5ba5b5 | 311 | |
3da4f367 JM |
312 | # ifdef tek4300 |
313 | # define FSCALE 100.0 | |
314 | # endif | |
59c0e567 | 315 | |
3da4f367 JM |
316 | # ifdef _AIX |
317 | # define FSCALE 65536.0 | |
318 | # endif | |
bc77c95c | 319 | |
3da4f367 | 320 | # endif /* Not FSCALE. */ |
1e5ba5b5 | 321 | |
3da4f367 | 322 | # if !defined (LDAV_CVT) && defined (FSCALE) |
87c35974 | 323 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) |
3da4f367 | 324 | # endif |
1e5ba5b5 | 325 | |
87c35974 DL |
326 | # ifndef NLIST_STRUCT |
327 | # if HAVE_NLIST_H | |
328 | # define NLIST_STRUCT | |
329 | # endif | |
330 | # endif | |
1e5ba5b5 | 331 | |
3da4f367 JM |
332 | # if defined(sgi) || (defined(mips) && !defined(BSD)) |
333 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
334 | # endif | |
1e5ba5b5 RM |
335 | |
336 | ||
3da4f367 JM |
337 | # if !defined (KERNEL_FILE) && defined (sequent) |
338 | # define KERNEL_FILE "/dynix" | |
339 | # endif | |
1e5ba5b5 | 340 | |
3da4f367 JM |
341 | # if !defined (KERNEL_FILE) && defined (hpux) |
342 | # define KERNEL_FILE "/hp-ux" | |
343 | # endif | |
1e5ba5b5 | 344 | |
3da4f367 JM |
345 | # if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || (defined (ardent) && defined (titan))) |
346 | # define KERNEL_FILE "/unix" | |
347 | # endif | |
1e5ba5b5 RM |
348 | |
349 | ||
3da4f367 JM |
350 | # if !defined (LDAV_SYMBOL) && defined (alliant) |
351 | # define LDAV_SYMBOL "_Loadavg" | |
352 | # endif | |
1e5ba5b5 | 353 | |
3da4f367 JM |
354 | # if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) |
355 | # define LDAV_SYMBOL "avenrun" | |
356 | # endif | |
1e5ba5b5 | 357 | |
3da4f367 JM |
358 | # ifdef HAVE_UNISTD_H |
359 | # include <unistd.h> | |
360 | # endif | |
1e5ba5b5 | 361 | |
3da4f367 | 362 | # include <stdio.h> |
1e5ba5b5 RM |
363 | |
364 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
365 | nlist method. */ | |
3da4f367 JM |
366 | # if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) |
367 | # define LOAD_AVE_TYPE double | |
368 | # endif | |
369 | ||
370 | # ifdef LOAD_AVE_TYPE | |
371 | ||
372 | # ifndef VMS | |
373 | # ifndef __linux__ | |
374 | # ifndef NLIST_STRUCT | |
375 | # include <a.out.h> | |
376 | # else /* NLIST_STRUCT */ | |
377 | # include <nlist.h> | |
378 | # endif /* NLIST_STRUCT */ | |
379 | ||
380 | # ifdef SUNOS_5 | |
381 | # include <fcntl.h> | |
382 | # include <kvm.h> | |
383 | # include <kstat.h> | |
384 | # endif | |
385 | ||
386 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | |
387 | # include <sys/pstat.h> | |
388 | # endif | |
389 | ||
390 | # ifndef KERNEL_FILE | |
391 | # define KERNEL_FILE "/vmunix" | |
392 | # endif /* KERNEL_FILE */ | |
393 | ||
394 | # ifndef LDAV_SYMBOL | |
395 | # define LDAV_SYMBOL "_avenrun" | |
396 | # endif /* LDAV_SYMBOL */ | |
397 | # endif /* __linux__ */ | |
398 | ||
399 | # else /* VMS */ | |
400 | ||
401 | # ifndef eunice | |
402 | # include <iodef.h> | |
403 | # include <descrip.h> | |
404 | # else /* eunice */ | |
405 | # include <vms/iodef.h> | |
406 | # endif /* eunice */ | |
407 | # endif /* VMS */ | |
408 | ||
409 | # ifndef LDAV_CVT | |
410 | # define LDAV_CVT(n) ((double) (n)) | |
411 | # endif /* !LDAV_CVT */ | |
412 | ||
413 | # endif /* LOAD_AVE_TYPE */ | |
414 | ||
d282be16 RS |
415 | # if defined(__GNU__) && !defined (NeXT) |
416 | /* Note that NeXT Openstep defines __GNU__ even though it should not. */ | |
417 | /* GNU system acts much like NeXT, for load average purposes, | |
418 | but not exactly. */ | |
2c30b2fc MB |
419 | # define NeXT |
420 | # define host_self mach_host_self | |
421 | # endif | |
422 | ||
db94bf9c | 423 | # ifdef NeXT |
3da4f367 JM |
424 | # ifdef HAVE_MACH_MACH_H |
425 | # include <mach/mach.h> | |
426 | # else | |
427 | # include <mach.h> | |
428 | # endif | |
429 | # endif /* NeXT */ | |
430 | ||
431 | # ifdef sgi | |
432 | # include <sys/sysmp.h> | |
433 | # endif /* sgi */ | |
434 | ||
435 | # ifdef UMAX | |
436 | # include <stdio.h> | |
437 | # include <signal.h> | |
438 | # include <sys/time.h> | |
439 | # include <sys/wait.h> | |
440 | # include <sys/syscall.h> | |
441 | ||
442 | # ifdef UMAX_43 | |
443 | # include <machine/cpu.h> | |
444 | # include <inq_stats/statistics.h> | |
445 | # include <inq_stats/sysstats.h> | |
446 | # include <inq_stats/cpustats.h> | |
447 | # include <inq_stats/procstats.h> | |
448 | # else /* Not UMAX_43. */ | |
449 | # include <sys/sysdefs.h> | |
450 | # include <sys/statistics.h> | |
451 | # include <sys/sysstats.h> | |
452 | # include <sys/cpudefs.h> | |
453 | # include <sys/cpustats.h> | |
454 | # include <sys/procstats.h> | |
455 | # endif /* Not UMAX_43. */ | |
456 | # endif /* UMAX */ | |
457 | ||
458 | # ifdef DGUX | |
459 | # include <sys/dg_sys_info.h> | |
460 | # endif | |
461 | ||
462 | # if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
463 | # include <fcntl.h> | |
464 | # else | |
465 | # include <sys/file.h> | |
466 | # endif | |
1e5ba5b5 RM |
467 | \f |
468 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
469 | ||
db94bf9c | 470 | # ifdef NeXT |
1e5ba5b5 RM |
471 | static processor_set_t default_set; |
472 | static int getloadavg_initialized; | |
3da4f367 | 473 | # endif /* NeXT */ |
1e5ba5b5 | 474 | |
3da4f367 | 475 | # ifdef UMAX |
1e5ba5b5 RM |
476 | static unsigned int cpus = 0; |
477 | static unsigned int samples; | |
3da4f367 | 478 | # endif /* UMAX */ |
1e5ba5b5 | 479 | |
3da4f367 | 480 | # ifdef DGUX |
1e5ba5b5 | 481 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ |
3da4f367 | 482 | # endif /* DGUX */ |
1e5ba5b5 | 483 | |
102f4b17 | 484 | #if !defined(HAVE_LIBKSTAT) && defined(LOAD_AVE_TYPE) |
1e5ba5b5 RM |
485 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ |
486 | static int channel; | |
e0f24100 | 487 | /* Nonzero if channel is valid. */ |
1e5ba5b5 RM |
488 | static int getloadavg_initialized; |
489 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
490 | static long offset; | |
491 | ||
87c35974 | 492 | # if !defined(VMS) && !defined(sgi) && !defined(__linux__) |
f100213e | 493 | static struct nlist name_list[2]; |
87c35974 | 494 | # endif /* Not VMS or sgi */ |
1e5ba5b5 | 495 | |
87c35974 | 496 | # ifdef SUNOS_5 |
1e5ba5b5 | 497 | static kvm_t *kd; |
87c35974 | 498 | # endif /* SUNOS_5 */ |
1e5ba5b5 | 499 | |
432eec29 | 500 | #endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ |
1e5ba5b5 RM |
501 | \f |
502 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
503 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 504 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
505 | or -1 if an error occurred. */ |
506 | ||
507 | int | |
508 | getloadavg (loadavg, nelem) | |
509 | double loadavg[]; | |
510 | int nelem; | |
511 | { | |
512 | int elem = 0; /* Return value. */ | |
513 | ||
3da4f367 JM |
514 | # ifdef NO_GET_LOAD_AVG |
515 | # define LDAV_DONE | |
7ee260fe RM |
516 | /* Set errno to zero to indicate that there was no particular error; |
517 | this function just can't work at all on this system. */ | |
518 | errno = 0; | |
519 | elem = -1; | |
3da4f367 | 520 | # endif |
7ee260fe | 521 | |
6b2e9efd | 522 | # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) |
4e98d4fa | 523 | /* Use libkstat because we don't have to be root. */ |
3da4f367 | 524 | # define LDAV_DONE |
4e98d4fa RS |
525 | kstat_ctl_t *kc; |
526 | kstat_t *ksp; | |
527 | kstat_named_t *kn; | |
528 | ||
529 | kc = kstat_open (); | |
3da4f367 JM |
530 | if (kc == 0) |
531 | return -1; | |
4e98d4fa | 532 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); |
3da4f367 JM |
533 | if (ksp == 0 ) |
534 | return -1; | |
535 | if (kstat_read (kc, ksp, 0) == -1) | |
536 | return -1; | |
73a46a9c | 537 | |
4e98d4fa RS |
538 | |
539 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
540 | if (kn == 0) | |
541 | { | |
542 | /* Return -1 if no load average information is available. */ | |
543 | nelem = 0; | |
544 | elem = -1; | |
545 | } | |
546 | ||
547 | if (nelem >= 1) | |
548 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
549 | ||
550 | if (nelem >= 2) | |
551 | { | |
552 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
553 | if (kn != 0) | |
554 | { | |
555 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
556 | ||
557 | if (nelem >= 3) | |
558 | { | |
559 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | |
560 | if (kn != 0) | |
561 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
562 | } | |
563 | } | |
564 | } | |
565 | ||
566 | kstat_close (kc); | |
6b2e9efd | 567 | # endif /* HAVE_LIBKSTAT */ |
4e98d4fa | 568 | |
3da4f367 JM |
569 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
570 | /* Use pstat_getdynamic() because we don't have to be root. */ | |
571 | # define LDAV_DONE | |
572 | # undef LOAD_AVE_TYPE | |
1e5ba5b5 | 573 | |
3da4f367 JM |
574 | struct pst_dynamic dyn_info; |
575 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | |
576 | return -1; | |
577 | if (nelem > 0) | |
578 | loadavg[elem++] = dyn_info.psd_avg_1_min; | |
579 | if (nelem > 1) | |
580 | loadavg[elem++] = dyn_info.psd_avg_5_min; | |
581 | if (nelem > 2) | |
582 | loadavg[elem++] = dyn_info.psd_avg_15_min; | |
583 | ||
584 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | |
585 | ||
586 | # if !defined (LDAV_DONE) && defined (__linux__) | |
587 | # define LDAV_DONE | |
588 | # undef LOAD_AVE_TYPE | |
589 | ||
590 | # ifndef LINUX_LDAV_FILE | |
591 | # define LINUX_LDAV_FILE "/proc/loadavg" | |
592 | # endif | |
1e5ba5b5 RM |
593 | |
594 | char ldavgbuf[40]; | |
595 | double load_ave[3]; | |
596 | int fd, count; | |
597 | ||
598 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
599 | if (fd == -1) | |
600 | return -1; | |
601 | count = read (fd, ldavgbuf, 40); | |
602 | (void) close (fd); | |
603 | if (count <= 0) | |
604 | return -1; | |
605 | ||
87c35974 DL |
606 | /* The following sscanf must use the C locale. */ |
607 | setlocale (LC_NUMERIC, "C"); | |
1e5ba5b5 RM |
608 | count = sscanf (ldavgbuf, "%lf %lf %lf", |
609 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
87c35974 | 610 | setlocale (LC_NUMERIC, ""); |
1e5ba5b5 RM |
611 | if (count < 1) |
612 | return -1; | |
613 | ||
614 | for (elem = 0; elem < nelem && elem < count; elem++) | |
615 | loadavg[elem] = load_ave[elem]; | |
616 | ||
617 | return elem; | |
618 | ||
3da4f367 | 619 | # endif /* __linux__ */ |
1e5ba5b5 | 620 | |
3da4f367 JM |
621 | # if !defined (LDAV_DONE) && defined (__NetBSD__) |
622 | # define LDAV_DONE | |
623 | # undef LOAD_AVE_TYPE | |
9eb8034b | 624 | |
3da4f367 JM |
625 | # ifndef NETBSD_LDAV_FILE |
626 | # define NETBSD_LDAV_FILE "/kern/loadavg" | |
627 | # endif | |
9eb8034b RM |
628 | |
629 | unsigned long int load_ave[3], scale; | |
630 | int count; | |
631 | FILE *fp; | |
632 | ||
8f090e85 | 633 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
634 | if (fp == NULL) |
635 | return -1; | |
636 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
637 | &load_ave[0], &load_ave[1], &load_ave[2], | |
638 | &scale); | |
639 | (void) fclose (fp); | |
640 | if (count != 4) | |
641 | return -1; | |
642 | ||
643 | for (elem = 0; elem < nelem; elem++) | |
644 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
645 | ||
646 | return elem; | |
647 | ||
3da4f367 | 648 | # endif /* __NetBSD__ */ |
9eb8034b | 649 | |
db94bf9c | 650 | # if !defined (LDAV_DONE) && defined (NeXT) |
3da4f367 | 651 | # define LDAV_DONE |
1e5ba5b5 RM |
652 | /* The NeXT code was adapted from iscreen 3.2. */ |
653 | ||
654 | host_t host; | |
655 | struct processor_set_basic_info info; | |
656 | unsigned info_count; | |
657 | ||
039e9c8b DM |
658 | /* We only know how to get the 1-minute average for this system, |
659 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
660 | |
661 | if (!getloadavg_initialized) | |
662 | { | |
663 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
664 | getloadavg_initialized = 1; | |
665 | } | |
666 | ||
667 | if (getloadavg_initialized) | |
668 | { | |
669 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
670 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
3da4f367 | 671 | (processor_set_info_t) &info, &info_count) |
1e5ba5b5 RM |
672 | != KERN_SUCCESS) |
673 | getloadavg_initialized = 0; | |
674 | else | |
675 | { | |
676 | if (nelem > 0) | |
677 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
678 | } | |
679 | } | |
680 | ||
681 | if (!getloadavg_initialized) | |
682 | return -1; | |
3da4f367 | 683 | # endif /* NeXT */ |
1e5ba5b5 | 684 | |
3da4f367 JM |
685 | # if !defined (LDAV_DONE) && defined (UMAX) |
686 | # define LDAV_DONE | |
1e5ba5b5 RM |
687 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not |
688 | have a /dev/kmem. Information about the workings of the running kernel | |
689 | can be gathered with inq_stats system calls. | |
690 | We only know how to get the 1-minute average for this system. */ | |
691 | ||
692 | struct proc_summary proc_sum_data; | |
693 | struct stat_descr proc_info; | |
694 | double load; | |
695 | register unsigned int i, j; | |
696 | ||
697 | if (cpus == 0) | |
698 | { | |
699 | register unsigned int c, i; | |
700 | struct cpu_config conf; | |
701 | struct stat_descr desc; | |
702 | ||
703 | desc.sd_next = 0; | |
704 | desc.sd_subsys = SUBSYS_CPU; | |
705 | desc.sd_type = CPUTYPE_CONFIG; | |
706 | desc.sd_addr = (char *) &conf; | |
707 | desc.sd_size = sizeof conf; | |
708 | ||
709 | if (inq_stats (1, &desc)) | |
710 | return -1; | |
711 | ||
712 | c = 0; | |
713 | for (i = 0; i < conf.config_maxclass; ++i) | |
714 | { | |
715 | struct class_stats stats; | |
72af86bd | 716 | memset (&stats, 0, sizeof stats); |
1e5ba5b5 RM |
717 | |
718 | desc.sd_type = CPUTYPE_CLASS; | |
719 | desc.sd_objid = i; | |
720 | desc.sd_addr = (char *) &stats; | |
721 | desc.sd_size = sizeof stats; | |
722 | ||
723 | if (inq_stats (1, &desc)) | |
724 | return -1; | |
725 | ||
726 | c += stats.class_numcpus; | |
727 | } | |
728 | cpus = c; | |
729 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
730 | } | |
731 | ||
732 | proc_info.sd_next = 0; | |
733 | proc_info.sd_subsys = SUBSYS_PROC; | |
734 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
735 | proc_info.sd_addr = (char *) &proc_sum_data; | |
736 | proc_info.sd_size = sizeof (struct proc_summary); | |
737 | proc_info.sd_sizeused = 0; | |
738 | ||
739 | if (inq_stats (1, &proc_info) != 0) | |
740 | return -1; | |
741 | ||
742 | load = proc_sum_data.ps_nrunnable; | |
743 | j = 0; | |
744 | for (i = samples - 1; i > 0; --i) | |
745 | { | |
746 | load += proc_sum_data.ps_nrun[j]; | |
747 | if (j++ == PS_NRUNSIZE) | |
748 | j = 0; | |
749 | } | |
750 | ||
751 | if (nelem > 0) | |
752 | loadavg[elem++] = load / samples / cpus; | |
3da4f367 | 753 | # endif /* UMAX */ |
1e5ba5b5 | 754 | |
3da4f367 JM |
755 | # if !defined (LDAV_DONE) && defined (DGUX) |
756 | # define LDAV_DONE | |
1e5ba5b5 RM |
757 | /* This call can return -1 for an error, but with good args |
758 | it's not supposed to fail. The first argument is for no | |
759 | apparent reason of type `long int *'. */ | |
760 | dg_sys_info ((long int *) &load_info, | |
761 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
762 | DG_SYS_INFO_LOAD_VERSION_0); | |
763 | ||
764 | if (nelem > 0) | |
765 | loadavg[elem++] = load_info.one_minute; | |
766 | if (nelem > 1) | |
767 | loadavg[elem++] = load_info.five_minute; | |
768 | if (nelem > 2) | |
769 | loadavg[elem++] = load_info.fifteen_minute; | |
3da4f367 | 770 | # endif /* DGUX */ |
1e5ba5b5 | 771 | |
3da4f367 JM |
772 | # if !defined (LDAV_DONE) && defined (apollo) |
773 | # define LDAV_DONE | |
1e5ba5b5 RM |
774 | /* Apollo code from lisch@mentorg.com (Ray Lischner). |
775 | ||
776 | This system call is not documented. The load average is obtained as | |
777 | three long integers, for the load average over the past minute, | |
778 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
779 | with 16 bits of integer part and 16 bits of fraction part. | |
780 | ||
781 | I'm not sure which operating system first supported this system call, | |
782 | but I know that SR10.2 supports it. */ | |
783 | ||
784 | extern void proc1_$get_loadav (); | |
785 | unsigned long load_ave[3]; | |
786 | ||
787 | proc1_$get_loadav (load_ave); | |
788 | ||
789 | if (nelem > 0) | |
790 | loadavg[elem++] = load_ave[0] / 65536.0; | |
791 | if (nelem > 1) | |
792 | loadavg[elem++] = load_ave[1] / 65536.0; | |
793 | if (nelem > 2) | |
794 | loadavg[elem++] = load_ave[2] / 65536.0; | |
3da4f367 | 795 | # endif /* apollo */ |
1e5ba5b5 | 796 | |
3da4f367 JM |
797 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) |
798 | # define LDAV_DONE | |
1e5ba5b5 RM |
799 | |
800 | struct tbl_loadavg load_ave; | |
801 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
802 | loadavg[elem++] |
803 | = (load_ave.tl_lscale == 0 | |
804 | ? load_ave.tl_avenrun.d[0] | |
805 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
3da4f367 | 806 | # endif /* OSF_MIPS */ |
1e5ba5b5 | 807 | |
383ebe49 | 808 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) |
3da4f367 | 809 | # define LDAV_DONE |
a7ee71e8 RS |
810 | |
811 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
26ff97e7 | 812 | for ( ; elem < nelem; elem++) |
a7ee71e8 RS |
813 | { |
814 | loadavg[elem] = 0.0; | |
815 | } | |
383ebe49 | 816 | # endif /* __MSDOS__ || WINDOWS32 */ |
a7ee71e8 | 817 | |
3da4f367 JM |
818 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) |
819 | # define LDAV_DONE | |
bbd619d7 RS |
820 | |
821 | struct tbl_loadavg load_ave; | |
822 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
823 | for (elem = 0; elem < nelem; elem++) | |
824 | loadavg[elem] | |
825 | = (load_ave.tl_lscale == 0 | |
826 | ? load_ave.tl_avenrun.d[elem] | |
827 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
3da4f367 | 828 | # endif /* OSF_ALPHA */ |
bbd619d7 | 829 | |
3da4f367 | 830 | # if !defined (LDAV_DONE) && defined (VMS) |
1e5ba5b5 RM |
831 | /* VMS specific code -- read from the Load Ave driver. */ |
832 | ||
833 | LOAD_AVE_TYPE load_ave[3]; | |
834 | static int getloadavg_initialized = 0; | |
3da4f367 | 835 | # ifdef eunice |
1e5ba5b5 RM |
836 | struct |
837 | { | |
838 | int dsc$w_length; | |
839 | char *dsc$a_pointer; | |
840 | } descriptor; | |
3da4f367 | 841 | # endif |
1e5ba5b5 RM |
842 | |
843 | /* Ensure that there is a channel open to the load ave device. */ | |
844 | if (!getloadavg_initialized) | |
845 | { | |
846 | /* Attempt to open the channel. */ | |
3da4f367 | 847 | # ifdef eunice |
1e5ba5b5 RM |
848 | descriptor.dsc$w_length = 18; |
849 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
3da4f367 | 850 | # else |
1e5ba5b5 | 851 | $DESCRIPTOR (descriptor, "LAV0:"); |
3da4f367 | 852 | # endif |
1e5ba5b5 RM |
853 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) |
854 | getloadavg_initialized = 1; | |
855 | } | |
856 | ||
857 | /* Read the load average vector. */ | |
858 | if (getloadavg_initialized | |
859 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
860 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
861 | { | |
862 | sys$dassgn (channel); | |
863 | getloadavg_initialized = 0; | |
864 | } | |
865 | ||
866 | if (!getloadavg_initialized) | |
867 | return -1; | |
3da4f367 | 868 | # endif /* VMS */ |
1e5ba5b5 | 869 | |
3da4f367 | 870 | # if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) |
1e5ba5b5 RM |
871 | |
872 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
873 | ||
3da4f367 | 874 | # define LDAV_PRIVILEGED /* This code requires special installation. */ |
1e5ba5b5 RM |
875 | |
876 | LOAD_AVE_TYPE load_ave[3]; | |
877 | ||
878 | /* Get the address of LDAV_SYMBOL. */ | |
879 | if (offset == 0) | |
880 | { | |
3da4f367 JM |
881 | # ifndef sgi |
882 | # ifndef NLIST_STRUCT | |
f100213e CY |
883 | strcpy (name_list[0].n_name, LDAV_SYMBOL); |
884 | strcpy (name_list[1].n_name, ""); | |
3da4f367 | 885 | # else /* NLIST_STRUCT */ |
87c35974 | 886 | # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME |
f100213e CY |
887 | name_list[0].n_un.n_name = LDAV_SYMBOL; |
888 | name_list[1].n_un.n_name = 0; | |
87c35974 | 889 | # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
f100213e CY |
890 | name_list[0].n_name = LDAV_SYMBOL; |
891 | name_list[1].n_name = 0; | |
87c35974 | 892 | # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
3da4f367 | 893 | # endif /* NLIST_STRUCT */ |
1e5ba5b5 | 894 | |
3da4f367 | 895 | # ifndef SUNOS_5 |
bc77c95c | 896 | if ( |
3da4f367 | 897 | # if !(defined (_AIX) && !defined (ps2)) |
f100213e | 898 | nlist (KERNEL_FILE, name_list) |
3da4f367 | 899 | # else /* _AIX */ |
f100213e | 900 | knlist (name_list, 1, sizeof (name_list[0])) |
3da4f367 | 901 | # endif |
bc77c95c | 902 | >= 0) |
f100213e | 903 | /* Omit "&& name_list[0].n_type != 0 " -- it breaks on Sun386i. */ |
bc77c95c | 904 | { |
3da4f367 | 905 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR |
f100213e | 906 | FIXUP_KERNEL_SYMBOL_ADDR (name_list); |
3da4f367 | 907 | # endif |
f100213e | 908 | offset = name_list[0].n_value; |
bc77c95c | 909 | } |
3da4f367 JM |
910 | # endif /* !SUNOS_5 */ |
911 | # else /* sgi */ | |
912 | int ldav_off; | |
913 | ||
914 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | |
915 | if (ldav_off != -1) | |
916 | offset = (long) ldav_off & 0x7fffffff; | |
917 | # endif /* sgi */ | |
918 | } | |
1e5ba5b5 RM |
919 | |
920 | /* Make sure we have /dev/kmem open. */ | |
921 | if (!getloadavg_initialized) | |
922 | { | |
3da4f367 | 923 | # ifndef SUNOS_5 |
1e5ba5b5 RM |
924 | channel = open ("/dev/kmem", 0); |
925 | if (channel >= 0) | |
00f7bd72 RM |
926 | { |
927 | /* Set the channel to close on exec, so it does not | |
928 | litter any child's descriptor table. */ | |
071b0719 | 929 | # ifdef F_SETFD |
3da4f367 JM |
930 | # ifndef FD_CLOEXEC |
931 | # define FD_CLOEXEC 1 | |
932 | # endif | |
00f7bd72 | 933 | (void) fcntl (channel, F_SETFD, FD_CLOEXEC); |
3da4f367 | 934 | # endif |
00f7bd72 RM |
935 | getloadavg_initialized = 1; |
936 | } | |
3da4f367 | 937 | # else /* SUNOS_5 */ |
fb3ebe6c DM |
938 | /* We pass 0 for the kernel, corefile, and swapfile names |
939 | to use the currently running kernel. */ | |
1e5ba5b5 | 940 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
26ff97e7 | 941 | if (kd != 0) |
1e5ba5b5 | 942 | { |
fb3ebe6c | 943 | /* nlist the currently running kernel. */ |
f100213e CY |
944 | kvm_nlist (kd, name_list); |
945 | offset = name_list[0].n_value; | |
1e5ba5b5 RM |
946 | getloadavg_initialized = 1; |
947 | } | |
3da4f367 | 948 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
949 | } |
950 | ||
951 | /* If we can, get the load average values. */ | |
952 | if (offset && getloadavg_initialized) | |
953 | { | |
954 | /* Try to read the load. */ | |
3da4f367 | 955 | # ifndef SUNOS_5 |
1e5ba5b5 RM |
956 | if (lseek (channel, offset, 0) == -1L |
957 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
958 | != sizeof (load_ave)) | |
959 | { | |
960 | close (channel); | |
961 | getloadavg_initialized = 0; | |
962 | } | |
3da4f367 | 963 | # else /* SUNOS_5 */ |
1e5ba5b5 RM |
964 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) |
965 | != sizeof (load_ave)) | |
966 | { | |
967 | kvm_close (kd); | |
968 | getloadavg_initialized = 0; | |
969 | } | |
3da4f367 | 970 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
971 | } |
972 | ||
973 | if (offset == 0 || !getloadavg_initialized) | |
974 | return -1; | |
3da4f367 | 975 | # endif /* LOAD_AVE_TYPE and not VMS */ |
1e5ba5b5 | 976 | |
3da4f367 | 977 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ |
1e5ba5b5 RM |
978 | if (nelem > 0) |
979 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
980 | if (nelem > 1) | |
981 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
982 | if (nelem > 2) | |
983 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
984 | ||
3da4f367 JM |
985 | # define LDAV_DONE |
986 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
1e5ba5b5 | 987 | |
3da4f367 | 988 | # ifdef LDAV_DONE |
1e5ba5b5 | 989 | return elem; |
3da4f367 | 990 | # else |
1e5ba5b5 RM |
991 | /* Set errno to zero to indicate that there was no particular error; |
992 | this function just can't work at all on this system. */ | |
993 | errno = 0; | |
994 | return -1; | |
3da4f367 | 995 | # endif |
1e5ba5b5 | 996 | } |
04402ae3 RM |
997 | |
998 | #endif /* ! HAVE_GETLOADAVG */ | |
1e5ba5b5 RM |
999 | \f |
1000 | #ifdef TEST | |
87c35974 | 1001 | void |
1e5ba5b5 RM |
1002 | main (argc, argv) |
1003 | int argc; | |
1004 | char **argv; | |
1005 | { | |
1006 | int naptime = 0; | |
1007 | ||
1008 | if (argc > 1) | |
1009 | naptime = atoi (argv[1]); | |
1010 | ||
1e5ba5b5 RM |
1011 | while (1) |
1012 | { | |
1013 | double avg[3]; | |
1014 | int loads; | |
1015 | ||
1016 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
1017 | loads = getloadavg (avg, 3); | |
1018 | if (loads == -1) | |
1019 | { | |
1020 | perror ("Error getting load average"); | |
1021 | exit (1); | |
1022 | } | |
1023 | if (loads > 0) | |
1024 | printf ("1-minute: %f ", avg[0]); | |
1025 | if (loads > 1) | |
1026 | printf ("5-minute: %f ", avg[1]); | |
1027 | if (loads > 2) | |
1028 | printf ("15-minute: %f ", avg[2]); | |
1029 | if (loads > 0) | |
1030 | putchar ('\n'); | |
db6730c7 RM |
1031 | |
1032 | if (naptime == 0) | |
1033 | break; | |
1e5ba5b5 RM |
1034 | sleep (naptime); |
1035 | } | |
db6730c7 RM |
1036 | |
1037 | exit (0); | |
1e5ba5b5 RM |
1038 | } |
1039 | #endif /* TEST */ | |
ab5796a9 MB |
1040 | |
1041 | /* arch-tag: 2b37a242-6289-41f4-8cd5-0e73fd615db1 | |
1042 | (do not change this comment) */ |