Commit | Line | Data |
---|---|---|
1e5ba5b5 | 1 | /* Get the system load averages. |
df3dd7d6 | 2 | Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995 |
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 | ||
22 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. | |
23 | KERNEL_FILE Pathname of the kernel to nlist. | |
24 | LDAV_CVT() Scale the load average from the kernel. | |
25 | Returns a double. | |
26 | LDAV_SYMBOL Name of kernel symbol giving load average. | |
27 | LOAD_AVE_TYPE Type of the load average array in the kernel. | |
28 | Must be defined unless one of | |
29 | apollo, DGUX, NeXT, or UMAX is defined; | |
30 | otherwise, no load average is available. | |
31 | NLIST_STRUCT Include nlist.h, not a.out.h, and | |
32 | the nlist n_name element is a pointer, | |
33 | not an array. | |
34 | NLIST_NAME_UNION struct nlist has an n_un member, not n_name. | |
22ddf250 | 35 | LINUX_LDAV_FILE [__linux__]: File containing load averages. |
1e5ba5b5 RM |
36 | |
37 | Specific system predefines this file uses, aside from setting | |
38 | default values if not emacs: | |
39 | ||
40 | apollo | |
41 | BSD Real BSD, not just BSD-like. | |
91bf5fad | 42 | convex |
1e5ba5b5 RM |
43 | DGUX |
44 | eunice UNIX emulator under VMS. | |
45 | hpux | |
26ff97e7 | 46 | MSDOS No-op for MSDOS. |
1e5ba5b5 RM |
47 | NeXT |
48 | sgi | |
49 | sequent Sequent Dynix 3.x.x (BSD) | |
50 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | |
51 | sony_news NEWS-OS (works at least for 4.1C) | |
52 | UMAX | |
53 | UMAX4_3 | |
54 | VMS | |
26ff97e7 | 55 | WIN32 No-op for Windows95/NT. |
22ddf250 | 56 | __linux__ Linux: assumes /proc filesystem mounted. |
1e5ba5b5 | 57 | Support from Michael K. Johnson. |
9eb8034b | 58 | __NetBSD__ NetBSD: assumes /kern filesystem mounted. |
1e5ba5b5 RM |
59 | |
60 | In addition, to avoid nesting many #ifdefs, we internally set | |
61 | LDAV_DONE to indicate that the load average has been computed. | |
62 | ||
63 | We also #define LDAV_PRIVILEGED if a program will require | |
64 | special installation to be able to call getloadavg. */ | |
65 | ||
df3dd7d6 RM |
66 | /* This should always be first. */ |
67 | #ifdef HAVE_CONFIG_H | |
68 | #include <config.h> | |
69 | #endif | |
70 | ||
1e5ba5b5 RM |
71 | #include <sys/types.h> |
72 | ||
73 | /* Both the Emacs and non-Emacs sections want this. Some | |
74 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
75 | sparc.h's) use macros like FSCALE, defined here. */ | |
76 | #ifdef unix | |
77 | #include <sys/param.h> | |
78 | #endif | |
79 | ||
80 | ||
04402ae3 | 81 | /* Exclude all the code except the test program at the end |
39c5a83f RM |
82 | if the system has its own `getloadavg' function. |
83 | ||
84 | The declaration of `errno' is needed by the test program | |
85 | as well as the function itself, so it comes first. */ | |
86 | ||
87 | #include <errno.h> | |
88 | ||
89 | #ifndef errno | |
90 | extern int errno; | |
91 | #endif | |
04402ae3 RM |
92 | |
93 | #ifndef HAVE_GETLOADAVG | |
94 | ||
95 | ||
1e5ba5b5 RM |
96 | /* The existing Emacs configuration files define a macro called |
97 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
98 | returns the load average multiplied by 100. What we actually want | |
99 | is a macro called LDAV_CVT, which returns the load average as an | |
100 | unmultiplied double. | |
101 | ||
102 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
103 | LOAD_AVE_CVT, but future machine config files should just define | |
104 | LDAV_CVT directly. */ | |
105 | ||
106 | #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) | |
107 | #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
108 | #endif | |
109 | ||
110 | #if !defined (BSD) && defined (ultrix) | |
111 | /* Ultrix behaves like BSD on Vaxen. */ | |
112 | #define BSD | |
113 | #endif | |
114 | ||
115 | #ifdef NeXT | |
116 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which | |
117 | conflicts with the definition understood in this file, that this | |
118 | really is BSD. */ | |
119 | #undef BSD | |
120 | ||
121 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
122 | defined to mean that the nlist method should be used, which is not true. */ | |
123 | #undef FSCALE | |
124 | #endif | |
125 | ||
126 | /* Set values that are different from the defaults, which are | |
127 | set a little farther down with #ifndef. */ | |
128 | ||
129 | ||
130 | /* Some shorthands. */ | |
131 | ||
132 | #if defined (HPUX) && !defined (hpux) | |
133 | #define hpux | |
134 | #endif | |
135 | ||
136 | #if defined(hp300) && !defined(hpux) | |
137 | #define MORE_BSD | |
138 | #endif | |
139 | ||
140 | #if defined(ultrix) && defined(mips) | |
141 | #define decstation | |
142 | #endif | |
143 | ||
6f32ea6a | 144 | #if (defined(sun) && defined(SVR4)) || defined (SOLARIS2) |
1e5ba5b5 RM |
145 | #define SUNOS_5 |
146 | #endif | |
147 | ||
d2a9653a | 148 | #if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
1e5ba5b5 | 149 | #define OSF_ALPHA |
bbd619d7 | 150 | #include <sys/table.h> |
1e5ba5b5 RM |
151 | #endif |
152 | ||
153 | #if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
154 | #define OSF_MIPS | |
155 | #include <sys/table.h> | |
156 | #endif | |
157 | ||
158 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
159 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
160 | that with a couple of other things and we'll have a unique match. */ | |
161 | #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) | |
162 | #define tek4300 /* Define by emacs, but not by other users. */ | |
163 | #endif | |
164 | ||
165 | ||
8eda6c51 | 166 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
5ac622b2 RM |
167 | #ifndef LOAD_AVE_TYPE |
168 | ||
8eda6c51 JB |
169 | #ifdef MORE_BSD |
170 | #define LOAD_AVE_TYPE long | |
171 | #endif | |
172 | ||
173 | #ifdef sun | |
174 | #define LOAD_AVE_TYPE long | |
175 | #endif | |
176 | ||
177 | #ifdef decstation | |
178 | #define LOAD_AVE_TYPE long | |
179 | #endif | |
180 | ||
181 | #ifdef _SEQUENT_ | |
182 | #define LOAD_AVE_TYPE long | |
183 | #endif | |
184 | ||
185 | #ifdef sgi | |
186 | #define LOAD_AVE_TYPE long | |
187 | #endif | |
188 | ||
189 | #ifdef SVR4 | |
190 | #define LOAD_AVE_TYPE long | |
191 | #endif | |
192 | ||
193 | #ifdef sony_news | |
194 | #define LOAD_AVE_TYPE long | |
195 | #endif | |
196 | ||
197 | #ifdef sequent | |
198 | #define LOAD_AVE_TYPE long | |
199 | #endif | |
200 | ||
201 | #ifdef OSF_ALPHA | |
202 | #define LOAD_AVE_TYPE long | |
203 | #endif | |
204 | ||
5ac622b2 | 205 | #if defined (ardent) && defined (titan) |
8eda6c51 JB |
206 | #define LOAD_AVE_TYPE long |
207 | #endif | |
208 | ||
5ac622b2 | 209 | #ifdef tek4300 |
1e5ba5b5 RM |
210 | #define LOAD_AVE_TYPE long |
211 | #endif | |
212 | ||
59c0e567 RM |
213 | #if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
214 | #define LOAD_AVE_TYPE long | |
215 | #endif | |
216 | ||
bc77c95c RM |
217 | #ifdef _AIX |
218 | #define LOAD_AVE_TYPE long | |
219 | #endif | |
220 | ||
91bf5fad RM |
221 | #ifdef convex |
222 | #define LOAD_AVE_TYPE double | |
223 | #ifndef LDAV_CVT | |
224 | #define LDAV_CVT(n) (n) | |
225 | #endif | |
226 | #endif | |
227 | ||
5ac622b2 | 228 | #endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 229 | |
f870f3fe RM |
230 | #ifdef OSF_ALPHA |
231 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, | |
232 | according to ghazi@noc.rutgers.edu. */ | |
233 | #undef FSCALE | |
234 | #define FSCALE 1024.0 | |
235 | #endif | |
236 | ||
bf074c06 RM |
237 | #if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
238 | /* <sys/param.h> defines an incorrect value for FSCALE on an | |
239 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
240 | #undef FSCALE | |
241 | #define FSCALE 100.0 | |
242 | #endif | |
243 | ||
f870f3fe | 244 | |
1e5ba5b5 RM |
245 | #ifndef FSCALE |
246 | ||
247 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
248 | ||
249 | #ifdef MORE_BSD | |
250 | #define FSCALE 2048.0 | |
251 | #endif | |
252 | ||
253 | #if defined(MIPS) || defined(SVR4) || defined(decstation) | |
254 | #define FSCALE 256 | |
255 | #endif | |
256 | ||
257 | #if defined (sgi) || defined (sequent) | |
934d56b7 RM |
258 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
259 | above under #ifdef MIPS. But we want the sgi value. */ | |
260 | #undef FSCALE | |
1e5ba5b5 RM |
261 | #define FSCALE 1000.0 |
262 | #endif | |
263 | ||
264 | #if defined (ardent) && defined (titan) | |
265 | #define FSCALE 65536.0 | |
266 | #endif | |
267 | ||
268 | #ifdef tek4300 | |
269 | #define FSCALE 100.0 | |
59c0e567 RM |
270 | #endif |
271 | ||
bc77c95c RM |
272 | #ifdef _AIX |
273 | #define FSCALE 65536.0 | |
274 | #endif | |
275 | ||
1e5ba5b5 RM |
276 | #endif /* Not FSCALE. */ |
277 | ||
278 | #if !defined (LDAV_CVT) && defined (FSCALE) | |
279 | #define LDAV_CVT(n) (((double) (n)) / FSCALE) | |
280 | #endif | |
281 | ||
8eda6c51 JB |
282 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ |
283 | #ifndef NLIST_STRUCT | |
284 | ||
285 | #ifdef MORE_BSD | |
286 | #define NLIST_STRUCT | |
287 | #endif | |
288 | ||
289 | #ifdef sun | |
290 | #define NLIST_STRUCT | |
291 | #endif | |
292 | ||
293 | #ifdef decstation | |
294 | #define NLIST_STRUCT | |
295 | #endif | |
296 | ||
297 | #ifdef hpux | |
298 | #define NLIST_STRUCT | |
299 | #endif | |
300 | ||
301 | #if defined (_SEQUENT_) || defined (sequent) | |
302 | #define NLIST_STRUCT | |
303 | #endif | |
304 | ||
305 | #ifdef sgi | |
306 | #define NLIST_STRUCT | |
307 | #endif | |
308 | ||
309 | #ifdef SVR4 | |
1e5ba5b5 RM |
310 | #define NLIST_STRUCT |
311 | #endif | |
312 | ||
8eda6c51 JB |
313 | #ifdef sony_news |
314 | #define NLIST_STRUCT | |
315 | #endif | |
316 | ||
317 | #ifdef OSF_ALPHA | |
318 | #define NLIST_STRUCT | |
319 | #endif | |
320 | ||
321 | #if defined (ardent) && defined (titan) | |
322 | #define NLIST_STRUCT | |
323 | #endif | |
324 | ||
59c0e567 | 325 | #ifdef tek4300 |
8eda6c51 JB |
326 | #define NLIST_STRUCT |
327 | #endif | |
328 | ||
329 | #ifdef butterfly | |
330 | #define NLIST_STRUCT | |
331 | #endif | |
332 | ||
59c0e567 RM |
333 | #if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
334 | #define NLIST_STRUCT | |
335 | #endif | |
336 | ||
bc77c95c RM |
337 | #ifdef _AIX |
338 | #define NLIST_STRUCT | |
339 | #endif | |
340 | ||
8eda6c51 JB |
341 | #endif /* defined (NLIST_STRUCT) */ |
342 | ||
1e5ba5b5 RM |
343 | |
344 | #if defined(sgi) || (defined(mips) && !defined(BSD)) | |
345 | #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
346 | #endif | |
347 | ||
348 | ||
349 | #if !defined (KERNEL_FILE) && defined (sequent) | |
350 | #define KERNEL_FILE "/dynix" | |
351 | #endif | |
352 | ||
353 | #if !defined (KERNEL_FILE) && defined (hpux) | |
354 | #define KERNEL_FILE "/hp-ux" | |
355 | #endif | |
356 | ||
357 | #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan))) | |
358 | #define KERNEL_FILE "/unix" | |
359 | #endif | |
360 | ||
361 | ||
362 | #if !defined (LDAV_SYMBOL) && defined (alliant) | |
363 | #define LDAV_SYMBOL "_Loadavg" | |
364 | #endif | |
365 | ||
bc77c95c | 366 | #if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) |
1e5ba5b5 RM |
367 | #define LDAV_SYMBOL "avenrun" |
368 | #endif | |
369 | ||
370 | #ifdef HAVE_UNISTD_H | |
371 | #include <unistd.h> | |
372 | #endif | |
373 | ||
374 | #include <stdio.h> | |
1e5ba5b5 RM |
375 | |
376 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
377 | nlist method. */ | |
378 | #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) | |
379 | #define LOAD_AVE_TYPE double | |
380 | #endif | |
381 | ||
382 | #ifdef LOAD_AVE_TYPE | |
383 | ||
384 | #ifndef VMS | |
385 | #ifndef NLIST_STRUCT | |
386 | #include <a.out.h> | |
387 | #else /* NLIST_STRUCT */ | |
388 | #include <nlist.h> | |
389 | #endif /* NLIST_STRUCT */ | |
390 | ||
391 | #ifdef SUNOS_5 | |
392 | #include <fcntl.h> | |
393 | #include <kvm.h> | |
4e98d4fa | 394 | #include <kstat.h> |
1e5ba5b5 RM |
395 | #endif |
396 | ||
397 | #ifndef KERNEL_FILE | |
398 | #define KERNEL_FILE "/vmunix" | |
399 | #endif /* KERNEL_FILE */ | |
400 | ||
401 | #ifndef LDAV_SYMBOL | |
402 | #define LDAV_SYMBOL "_avenrun" | |
403 | #endif /* LDAV_SYMBOL */ | |
404 | ||
405 | #else /* VMS */ | |
406 | ||
407 | #ifndef eunice | |
408 | #include <iodef.h> | |
409 | #include <descrip.h> | |
410 | #else /* eunice */ | |
411 | #include <vms/iodef.h> | |
412 | #endif /* eunice */ | |
413 | #endif /* VMS */ | |
414 | ||
415 | #ifndef LDAV_CVT | |
416 | #define LDAV_CVT(n) ((double) (n)) | |
417 | #endif /* !LDAV_CVT */ | |
418 | ||
419 | #endif /* LOAD_AVE_TYPE */ | |
420 | ||
421 | #ifdef NeXT | |
422 | #ifdef HAVE_MACH_MACH_H | |
423 | #include <mach/mach.h> | |
424 | #else | |
425 | #include <mach.h> | |
426 | #endif | |
427 | #endif /* NeXT */ | |
428 | ||
429 | #ifdef sgi | |
430 | #include <sys/sysmp.h> | |
431 | #endif /* sgi */ | |
432 | ||
433 | #ifdef UMAX | |
434 | #include <stdio.h> | |
435 | #include <signal.h> | |
436 | #include <sys/time.h> | |
437 | #include <sys/wait.h> | |
438 | #include <sys/syscall.h> | |
439 | ||
440 | #ifdef UMAX_43 | |
441 | #include <machine/cpu.h> | |
442 | #include <inq_stats/statistics.h> | |
443 | #include <inq_stats/sysstats.h> | |
444 | #include <inq_stats/cpustats.h> | |
445 | #include <inq_stats/procstats.h> | |
446 | #else /* Not UMAX_43. */ | |
447 | #include <sys/sysdefs.h> | |
448 | #include <sys/statistics.h> | |
449 | #include <sys/sysstats.h> | |
450 | #include <sys/cpudefs.h> | |
451 | #include <sys/cpustats.h> | |
452 | #include <sys/procstats.h> | |
453 | #endif /* Not UMAX_43. */ | |
454 | #endif /* UMAX */ | |
455 | ||
456 | #ifdef DGUX | |
457 | #include <sys/dg_sys_info.h> | |
458 | #endif | |
459 | ||
460 | #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
461 | #include <fcntl.h> | |
462 | #else | |
463 | #include <sys/file.h> | |
464 | #endif | |
465 | \f | |
466 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
467 | ||
468 | #ifdef NeXT | |
469 | static processor_set_t default_set; | |
470 | static int getloadavg_initialized; | |
471 | #endif /* NeXT */ | |
472 | ||
473 | #ifdef UMAX | |
474 | static unsigned int cpus = 0; | |
475 | static unsigned int samples; | |
476 | #endif /* UMAX */ | |
477 | ||
478 | #ifdef DGUX | |
479 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ | |
480 | #endif /* DGUX */ | |
481 | ||
482 | #ifdef LOAD_AVE_TYPE | |
483 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ | |
484 | static int channel; | |
485 | /* Nonzero iff channel is valid. */ | |
486 | static int getloadavg_initialized; | |
487 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
488 | static long offset; | |
489 | ||
490 | #if !defined(VMS) && !defined(sgi) | |
491 | static struct nlist nl[2]; | |
492 | #endif /* Not VMS or sgi */ | |
493 | ||
494 | #ifdef SUNOS_5 | |
495 | static kvm_t *kd; | |
496 | #endif /* SUNOS_5 */ | |
497 | ||
498 | #endif /* LOAD_AVE_TYPE */ | |
499 | \f | |
500 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
501 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 502 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
503 | or -1 if an error occurred. */ |
504 | ||
505 | int | |
506 | getloadavg (loadavg, nelem) | |
507 | double loadavg[]; | |
508 | int nelem; | |
509 | { | |
510 | int elem = 0; /* Return value. */ | |
511 | ||
7ee260fe RM |
512 | #ifdef NO_GET_LOAD_AVG |
513 | #define LDAV_DONE | |
514 | /* Set errno to zero to indicate that there was no particular error; | |
515 | this function just can't work at all on this system. */ | |
516 | errno = 0; | |
517 | elem = -1; | |
518 | #endif | |
519 | ||
4e98d4fa RS |
520 | #if !defined (LDAV_DONE) && defined (SUNOS_5) |
521 | /* Use libkstat because we don't have to be root. */ | |
522 | #define LDAV_DONE | |
523 | kstat_ctl_t *kc; | |
524 | kstat_t *ksp; | |
525 | kstat_named_t *kn; | |
526 | ||
527 | kc = kstat_open (); | |
528 | if (kc == 0) return -1; | |
529 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); | |
530 | if (ksp == 0 ) return -1; | |
531 | if (kstat_read (kc, ksp, 0) == -1) return -1; | |
532 | ||
533 | ||
534 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
535 | if (kn == 0) | |
536 | { | |
537 | /* Return -1 if no load average information is available. */ | |
538 | nelem = 0; | |
539 | elem = -1; | |
540 | } | |
541 | ||
542 | if (nelem >= 1) | |
543 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
544 | ||
545 | if (nelem >= 2) | |
546 | { | |
547 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
548 | if (kn != 0) | |
549 | { | |
550 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
551 | ||
552 | if (nelem >= 3) | |
553 | { | |
554 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | |
555 | if (kn != 0) | |
556 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
557 | } | |
558 | } | |
559 | } | |
560 | ||
561 | kstat_close (kc); | |
562 | #endif /* SUNOS_5 */ | |
563 | ||
22ddf250 | 564 | #if !defined (LDAV_DONE) && defined (__linux__) |
1e5ba5b5 RM |
565 | #define LDAV_DONE |
566 | #undef LOAD_AVE_TYPE | |
567 | ||
568 | #ifndef LINUX_LDAV_FILE | |
569 | #define LINUX_LDAV_FILE "/proc/loadavg" | |
570 | #endif | |
571 | ||
572 | char ldavgbuf[40]; | |
573 | double load_ave[3]; | |
574 | int fd, count; | |
575 | ||
576 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
577 | if (fd == -1) | |
578 | return -1; | |
579 | count = read (fd, ldavgbuf, 40); | |
580 | (void) close (fd); | |
581 | if (count <= 0) | |
582 | return -1; | |
583 | ||
584 | count = sscanf (ldavgbuf, "%lf %lf %lf", | |
585 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
586 | if (count < 1) | |
587 | return -1; | |
588 | ||
589 | for (elem = 0; elem < nelem && elem < count; elem++) | |
590 | loadavg[elem] = load_ave[elem]; | |
591 | ||
592 | return elem; | |
593 | ||
22ddf250 | 594 | #endif /* __linux__ */ |
1e5ba5b5 | 595 | |
9eb8034b RM |
596 | #if !defined (LDAV_DONE) && defined (__NetBSD__) |
597 | #define LDAV_DONE | |
598 | #undef LOAD_AVE_TYPE | |
599 | ||
600 | #ifndef NETBSD_LDAV_FILE | |
601 | #define NETBSD_LDAV_FILE "/kern/loadavg" | |
602 | #endif | |
603 | ||
604 | unsigned long int load_ave[3], scale; | |
605 | int count; | |
606 | FILE *fp; | |
607 | ||
8f090e85 | 608 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
609 | if (fp == NULL) |
610 | return -1; | |
611 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
612 | &load_ave[0], &load_ave[1], &load_ave[2], | |
613 | &scale); | |
614 | (void) fclose (fp); | |
615 | if (count != 4) | |
616 | return -1; | |
617 | ||
618 | for (elem = 0; elem < nelem; elem++) | |
619 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
620 | ||
621 | return elem; | |
622 | ||
623 | #endif /* __NetBSD__ */ | |
624 | ||
1e5ba5b5 RM |
625 | #if !defined (LDAV_DONE) && defined (NeXT) |
626 | #define LDAV_DONE | |
627 | /* The NeXT code was adapted from iscreen 3.2. */ | |
628 | ||
629 | host_t host; | |
630 | struct processor_set_basic_info info; | |
631 | unsigned info_count; | |
632 | ||
039e9c8b DM |
633 | /* We only know how to get the 1-minute average for this system, |
634 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
635 | |
636 | if (!getloadavg_initialized) | |
637 | { | |
638 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
639 | getloadavg_initialized = 1; | |
640 | } | |
641 | ||
642 | if (getloadavg_initialized) | |
643 | { | |
644 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
645 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
646 | (processor_set_info_t) &info, &info_count) | |
647 | != KERN_SUCCESS) | |
648 | getloadavg_initialized = 0; | |
649 | else | |
650 | { | |
651 | if (nelem > 0) | |
652 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
653 | } | |
654 | } | |
655 | ||
656 | if (!getloadavg_initialized) | |
657 | return -1; | |
658 | #endif /* NeXT */ | |
659 | ||
660 | #if !defined (LDAV_DONE) && defined (UMAX) | |
661 | #define LDAV_DONE | |
662 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not | |
663 | have a /dev/kmem. Information about the workings of the running kernel | |
664 | can be gathered with inq_stats system calls. | |
665 | We only know how to get the 1-minute average for this system. */ | |
666 | ||
667 | struct proc_summary proc_sum_data; | |
668 | struct stat_descr proc_info; | |
669 | double load; | |
670 | register unsigned int i, j; | |
671 | ||
672 | if (cpus == 0) | |
673 | { | |
674 | register unsigned int c, i; | |
675 | struct cpu_config conf; | |
676 | struct stat_descr desc; | |
677 | ||
678 | desc.sd_next = 0; | |
679 | desc.sd_subsys = SUBSYS_CPU; | |
680 | desc.sd_type = CPUTYPE_CONFIG; | |
681 | desc.sd_addr = (char *) &conf; | |
682 | desc.sd_size = sizeof conf; | |
683 | ||
684 | if (inq_stats (1, &desc)) | |
685 | return -1; | |
686 | ||
687 | c = 0; | |
688 | for (i = 0; i < conf.config_maxclass; ++i) | |
689 | { | |
690 | struct class_stats stats; | |
691 | bzero ((char *) &stats, sizeof stats); | |
692 | ||
693 | desc.sd_type = CPUTYPE_CLASS; | |
694 | desc.sd_objid = i; | |
695 | desc.sd_addr = (char *) &stats; | |
696 | desc.sd_size = sizeof stats; | |
697 | ||
698 | if (inq_stats (1, &desc)) | |
699 | return -1; | |
700 | ||
701 | c += stats.class_numcpus; | |
702 | } | |
703 | cpus = c; | |
704 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
705 | } | |
706 | ||
707 | proc_info.sd_next = 0; | |
708 | proc_info.sd_subsys = SUBSYS_PROC; | |
709 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
710 | proc_info.sd_addr = (char *) &proc_sum_data; | |
711 | proc_info.sd_size = sizeof (struct proc_summary); | |
712 | proc_info.sd_sizeused = 0; | |
713 | ||
714 | if (inq_stats (1, &proc_info) != 0) | |
715 | return -1; | |
716 | ||
717 | load = proc_sum_data.ps_nrunnable; | |
718 | j = 0; | |
719 | for (i = samples - 1; i > 0; --i) | |
720 | { | |
721 | load += proc_sum_data.ps_nrun[j]; | |
722 | if (j++ == PS_NRUNSIZE) | |
723 | j = 0; | |
724 | } | |
725 | ||
726 | if (nelem > 0) | |
727 | loadavg[elem++] = load / samples / cpus; | |
728 | #endif /* UMAX */ | |
729 | ||
730 | #if !defined (LDAV_DONE) && defined (DGUX) | |
731 | #define LDAV_DONE | |
732 | /* This call can return -1 for an error, but with good args | |
733 | it's not supposed to fail. The first argument is for no | |
734 | apparent reason of type `long int *'. */ | |
735 | dg_sys_info ((long int *) &load_info, | |
736 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
737 | DG_SYS_INFO_LOAD_VERSION_0); | |
738 | ||
739 | if (nelem > 0) | |
740 | loadavg[elem++] = load_info.one_minute; | |
741 | if (nelem > 1) | |
742 | loadavg[elem++] = load_info.five_minute; | |
743 | if (nelem > 2) | |
744 | loadavg[elem++] = load_info.fifteen_minute; | |
745 | #endif /* DGUX */ | |
746 | ||
747 | #if !defined (LDAV_DONE) && defined (apollo) | |
748 | #define LDAV_DONE | |
749 | /* Apollo code from lisch@mentorg.com (Ray Lischner). | |
750 | ||
751 | This system call is not documented. The load average is obtained as | |
752 | three long integers, for the load average over the past minute, | |
753 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
754 | with 16 bits of integer part and 16 bits of fraction part. | |
755 | ||
756 | I'm not sure which operating system first supported this system call, | |
757 | but I know that SR10.2 supports it. */ | |
758 | ||
759 | extern void proc1_$get_loadav (); | |
760 | unsigned long load_ave[3]; | |
761 | ||
762 | proc1_$get_loadav (load_ave); | |
763 | ||
764 | if (nelem > 0) | |
765 | loadavg[elem++] = load_ave[0] / 65536.0; | |
766 | if (nelem > 1) | |
767 | loadavg[elem++] = load_ave[1] / 65536.0; | |
768 | if (nelem > 2) | |
769 | loadavg[elem++] = load_ave[2] / 65536.0; | |
770 | #endif /* apollo */ | |
771 | ||
772 | #if !defined (LDAV_DONE) && defined (OSF_MIPS) | |
773 | #define LDAV_DONE | |
1e5ba5b5 RM |
774 | |
775 | struct tbl_loadavg load_ave; | |
776 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
777 | loadavg[elem++] |
778 | = (load_ave.tl_lscale == 0 | |
779 | ? load_ave.tl_avenrun.d[0] | |
780 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
1e5ba5b5 RM |
781 | #endif /* OSF_MIPS */ |
782 | ||
26ff97e7 | 783 | #if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32)) |
a7ee71e8 RS |
784 | #define LDAV_DONE |
785 | ||
786 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
26ff97e7 | 787 | for ( ; elem < nelem; elem++) |
a7ee71e8 RS |
788 | { |
789 | loadavg[elem] = 0.0; | |
790 | } | |
791 | #endif /* MSDOS */ | |
792 | ||
bbd619d7 RS |
793 | #if !defined (LDAV_DONE) && defined (OSF_ALPHA) |
794 | #define LDAV_DONE | |
795 | ||
796 | struct tbl_loadavg load_ave; | |
797 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
798 | for (elem = 0; elem < nelem; elem++) | |
799 | loadavg[elem] | |
800 | = (load_ave.tl_lscale == 0 | |
801 | ? load_ave.tl_avenrun.d[elem] | |
802 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
803 | #endif /* OSF_ALPHA */ | |
804 | ||
1e5ba5b5 RM |
805 | #if !defined (LDAV_DONE) && defined (VMS) |
806 | /* VMS specific code -- read from the Load Ave driver. */ | |
807 | ||
808 | LOAD_AVE_TYPE load_ave[3]; | |
809 | static int getloadavg_initialized = 0; | |
810 | #ifdef eunice | |
811 | struct | |
812 | { | |
813 | int dsc$w_length; | |
814 | char *dsc$a_pointer; | |
815 | } descriptor; | |
816 | #endif | |
817 | ||
818 | /* Ensure that there is a channel open to the load ave device. */ | |
819 | if (!getloadavg_initialized) | |
820 | { | |
821 | /* Attempt to open the channel. */ | |
822 | #ifdef eunice | |
823 | descriptor.dsc$w_length = 18; | |
824 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
825 | #else | |
826 | $DESCRIPTOR (descriptor, "LAV0:"); | |
827 | #endif | |
828 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) | |
829 | getloadavg_initialized = 1; | |
830 | } | |
831 | ||
832 | /* Read the load average vector. */ | |
833 | if (getloadavg_initialized | |
834 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
835 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
836 | { | |
837 | sys$dassgn (channel); | |
838 | getloadavg_initialized = 0; | |
839 | } | |
840 | ||
841 | if (!getloadavg_initialized) | |
842 | return -1; | |
843 | #endif /* VMS */ | |
844 | ||
845 | #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) | |
846 | ||
847 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
848 | ||
849 | #define LDAV_PRIVILEGED /* This code requires special installation. */ | |
850 | ||
851 | LOAD_AVE_TYPE load_ave[3]; | |
852 | ||
853 | /* Get the address of LDAV_SYMBOL. */ | |
854 | if (offset == 0) | |
855 | { | |
1e5ba5b5 RM |
856 | #ifndef sgi |
857 | #ifndef NLIST_STRUCT | |
858 | strcpy (nl[0].n_name, LDAV_SYMBOL); | |
859 | strcpy (nl[1].n_name, ""); | |
860 | #else /* NLIST_STRUCT */ | |
861 | #ifdef NLIST_NAME_UNION | |
862 | nl[0].n_un.n_name = LDAV_SYMBOL; | |
863 | nl[1].n_un.n_name = 0; | |
864 | #else /* not NLIST_NAME_UNION */ | |
865 | nl[0].n_name = LDAV_SYMBOL; | |
866 | nl[1].n_name = 0; | |
867 | #endif /* not NLIST_NAME_UNION */ | |
868 | #endif /* NLIST_STRUCT */ | |
869 | ||
fb3ebe6c | 870 | #ifndef SUNOS_5 |
bc77c95c | 871 | if ( |
ae333800 | 872 | #if !(defined (_AIX) && !defined (ps2)) |
bc77c95c RM |
873 | nlist (KERNEL_FILE, nl) |
874 | #else /* _AIX */ | |
875 | knlist (nl, 1, sizeof (nl[0])) | |
876 | #endif | |
877 | >= 0) | |
878 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | |
879 | { | |
1e5ba5b5 | 880 | #ifdef FIXUP_KERNEL_SYMBOL_ADDR |
bc77c95c | 881 | FIXUP_KERNEL_SYMBOL_ADDR (nl); |
1e5ba5b5 | 882 | #endif |
bc77c95c RM |
883 | offset = nl[0].n_value; |
884 | } | |
885 | #endif /* !SUNOS_5 */ | |
886 | #else /* sgi */ | |
887 | int ldav_off; | |
1e5ba5b5 | 888 | |
bc77c95c RM |
889 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); |
890 | if (ldav_off != -1) | |
891 | offset = (long) ldav_off & 0x7fffffff; | |
1e5ba5b5 | 892 | #endif /* sgi */ |
bc77c95c | 893 | } |
1e5ba5b5 RM |
894 | |
895 | /* Make sure we have /dev/kmem open. */ | |
896 | if (!getloadavg_initialized) | |
897 | { | |
898 | #ifndef SUNOS_5 | |
899 | channel = open ("/dev/kmem", 0); | |
900 | if (channel >= 0) | |
00f7bd72 RM |
901 | { |
902 | /* Set the channel to close on exec, so it does not | |
903 | litter any child's descriptor table. */ | |
904 | #ifdef FD_SETFD | |
905 | #ifndef FD_CLOEXEC | |
906 | #define FD_CLOEXEC 1 | |
907 | #endif | |
908 | (void) fcntl (channel, F_SETFD, FD_CLOEXEC); | |
909 | #endif | |
910 | getloadavg_initialized = 1; | |
911 | } | |
1e5ba5b5 | 912 | #else /* SUNOS_5 */ |
fb3ebe6c DM |
913 | /* We pass 0 for the kernel, corefile, and swapfile names |
914 | to use the currently running kernel. */ | |
1e5ba5b5 | 915 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
26ff97e7 | 916 | if (kd != 0) |
1e5ba5b5 | 917 | { |
fb3ebe6c | 918 | /* nlist the currently running kernel. */ |
1e5ba5b5 | 919 | kvm_nlist (kd, nl); |
fb3ebe6c | 920 | offset = nl[0].n_value; |
1e5ba5b5 RM |
921 | getloadavg_initialized = 1; |
922 | } | |
923 | #endif /* SUNOS_5 */ | |
924 | } | |
925 | ||
926 | /* If we can, get the load average values. */ | |
927 | if (offset && getloadavg_initialized) | |
928 | { | |
929 | /* Try to read the load. */ | |
930 | #ifndef SUNOS_5 | |
931 | if (lseek (channel, offset, 0) == -1L | |
932 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
933 | != sizeof (load_ave)) | |
934 | { | |
935 | close (channel); | |
936 | getloadavg_initialized = 0; | |
937 | } | |
938 | #else /* SUNOS_5 */ | |
939 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) | |
940 | != sizeof (load_ave)) | |
941 | { | |
942 | kvm_close (kd); | |
943 | getloadavg_initialized = 0; | |
944 | } | |
945 | #endif /* SUNOS_5 */ | |
946 | } | |
947 | ||
948 | if (offset == 0 || !getloadavg_initialized) | |
949 | return -1; | |
950 | #endif /* LOAD_AVE_TYPE and not VMS */ | |
951 | ||
952 | #if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ | |
953 | if (nelem > 0) | |
954 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
955 | if (nelem > 1) | |
956 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
957 | if (nelem > 2) | |
958 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
959 | ||
960 | #define LDAV_DONE | |
961 | #endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
962 | ||
963 | #ifdef LDAV_DONE | |
964 | return elem; | |
965 | #else | |
966 | /* Set errno to zero to indicate that there was no particular error; | |
967 | this function just can't work at all on this system. */ | |
968 | errno = 0; | |
969 | return -1; | |
970 | #endif | |
971 | } | |
04402ae3 RM |
972 | |
973 | #endif /* ! HAVE_GETLOADAVG */ | |
1e5ba5b5 RM |
974 | \f |
975 | #ifdef TEST | |
976 | void | |
977 | main (argc, argv) | |
978 | int argc; | |
979 | char **argv; | |
980 | { | |
981 | int naptime = 0; | |
982 | ||
983 | if (argc > 1) | |
984 | naptime = atoi (argv[1]); | |
985 | ||
1e5ba5b5 RM |
986 | while (1) |
987 | { | |
988 | double avg[3]; | |
989 | int loads; | |
990 | ||
991 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
992 | loads = getloadavg (avg, 3); | |
993 | if (loads == -1) | |
994 | { | |
995 | perror ("Error getting load average"); | |
996 | exit (1); | |
997 | } | |
998 | if (loads > 0) | |
999 | printf ("1-minute: %f ", avg[0]); | |
1000 | if (loads > 1) | |
1001 | printf ("5-minute: %f ", avg[1]); | |
1002 | if (loads > 2) | |
1003 | printf ("15-minute: %f ", avg[2]); | |
1004 | if (loads > 0) | |
1005 | putchar ('\n'); | |
db6730c7 RM |
1006 | |
1007 | if (naptime == 0) | |
1008 | break; | |
1e5ba5b5 RM |
1009 | sleep (naptime); |
1010 | } | |
db6730c7 RM |
1011 | |
1012 | exit (0); | |
1e5ba5b5 RM |
1013 | } |
1014 | #endif /* TEST */ |