Commit | Line | Data |
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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 | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
18 | ||
19 | /* Compile-time symbols that this file uses: | |
20 | ||
21 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. | |
22 | KERNEL_FILE Pathname of the kernel to nlist. | |
23 | LDAV_CVT() Scale the load average from the kernel. | |
24 | Returns a double. | |
25 | LDAV_SYMBOL Name of kernel symbol giving load average. | |
26 | LOAD_AVE_TYPE Type of the load average array in the kernel. | |
27 | Must be defined unless one of | |
28 | apollo, DGUX, NeXT, or UMAX is defined; | |
29 | otherwise, no load average is available. | |
30 | NLIST_STRUCT Include nlist.h, not a.out.h, and | |
31 | the nlist n_name element is a pointer, | |
32 | not an array. | |
33 | NLIST_NAME_UNION struct nlist has an n_un member, not n_name. | |
22ddf250 | 34 | LINUX_LDAV_FILE [__linux__]: File containing load averages. |
1e5ba5b5 RM |
35 | |
36 | Specific system predefines this file uses, aside from setting | |
37 | default values if not emacs: | |
38 | ||
39 | apollo | |
40 | BSD Real BSD, not just BSD-like. | |
41 | DGUX | |
42 | eunice UNIX emulator under VMS. | |
43 | hpux | |
44 | NeXT | |
45 | sgi | |
46 | sequent Sequent Dynix 3.x.x (BSD) | |
47 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | |
48 | sony_news NEWS-OS (works at least for 4.1C) | |
49 | UMAX | |
50 | UMAX4_3 | |
51 | VMS | |
22ddf250 | 52 | __linux__ Linux: assumes /proc filesystem mounted. |
1e5ba5b5 | 53 | Support from Michael K. Johnson. |
9eb8034b | 54 | __NetBSD__ NetBSD: assumes /kern filesystem mounted. |
1e5ba5b5 RM |
55 | |
56 | In addition, to avoid nesting many #ifdefs, we internally set | |
57 | LDAV_DONE to indicate that the load average has been computed. | |
58 | ||
59 | We also #define LDAV_PRIVILEGED if a program will require | |
60 | special installation to be able to call getloadavg. */ | |
61 | ||
df3dd7d6 RM |
62 | /* This should always be first. */ |
63 | #ifdef HAVE_CONFIG_H | |
64 | #include <config.h> | |
65 | #endif | |
66 | ||
1e5ba5b5 RM |
67 | #include <sys/types.h> |
68 | ||
69 | /* Both the Emacs and non-Emacs sections want this. Some | |
70 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
71 | sparc.h's) use macros like FSCALE, defined here. */ | |
72 | #ifdef unix | |
73 | #include <sys/param.h> | |
74 | #endif | |
75 | ||
76 | ||
04402ae3 | 77 | /* Exclude all the code except the test program at the end |
39c5a83f RM |
78 | if the system has its own `getloadavg' function. |
79 | ||
80 | The declaration of `errno' is needed by the test program | |
81 | as well as the function itself, so it comes first. */ | |
82 | ||
83 | #include <errno.h> | |
84 | ||
85 | #ifndef errno | |
86 | extern int errno; | |
87 | #endif | |
04402ae3 RM |
88 | |
89 | #ifndef HAVE_GETLOADAVG | |
90 | ||
91 | ||
1e5ba5b5 RM |
92 | /* The existing Emacs configuration files define a macro called |
93 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
94 | returns the load average multiplied by 100. What we actually want | |
95 | is a macro called LDAV_CVT, which returns the load average as an | |
96 | unmultiplied double. | |
97 | ||
98 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
99 | LOAD_AVE_CVT, but future machine config files should just define | |
100 | LDAV_CVT directly. */ | |
101 | ||
102 | #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) | |
103 | #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
104 | #endif | |
105 | ||
106 | #if !defined (BSD) && defined (ultrix) | |
107 | /* Ultrix behaves like BSD on Vaxen. */ | |
108 | #define BSD | |
109 | #endif | |
110 | ||
111 | #ifdef NeXT | |
112 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which | |
113 | conflicts with the definition understood in this file, that this | |
114 | really is BSD. */ | |
115 | #undef BSD | |
116 | ||
117 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
118 | defined to mean that the nlist method should be used, which is not true. */ | |
119 | #undef FSCALE | |
120 | #endif | |
121 | ||
122 | /* Set values that are different from the defaults, which are | |
123 | set a little farther down with #ifndef. */ | |
124 | ||
125 | ||
126 | /* Some shorthands. */ | |
127 | ||
128 | #if defined (HPUX) && !defined (hpux) | |
129 | #define hpux | |
130 | #endif | |
131 | ||
132 | #if defined(hp300) && !defined(hpux) | |
133 | #define MORE_BSD | |
134 | #endif | |
135 | ||
136 | #if defined(ultrix) && defined(mips) | |
137 | #define decstation | |
138 | #endif | |
139 | ||
140 | #if defined(sun) && defined(SVR4) | |
141 | #define SUNOS_5 | |
142 | #endif | |
143 | ||
d2a9653a | 144 | #if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
1e5ba5b5 | 145 | #define OSF_ALPHA |
bbd619d7 | 146 | #include <sys/table.h> |
1e5ba5b5 RM |
147 | #endif |
148 | ||
149 | #if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
150 | #define OSF_MIPS | |
151 | #include <sys/table.h> | |
152 | #endif | |
153 | ||
154 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
155 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
156 | that with a couple of other things and we'll have a unique match. */ | |
157 | #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) | |
158 | #define tek4300 /* Define by emacs, but not by other users. */ | |
159 | #endif | |
160 | ||
161 | ||
8eda6c51 | 162 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
5ac622b2 RM |
163 | #ifndef LOAD_AVE_TYPE |
164 | ||
8eda6c51 JB |
165 | #ifdef MORE_BSD |
166 | #define LOAD_AVE_TYPE long | |
167 | #endif | |
168 | ||
169 | #ifdef sun | |
170 | #define LOAD_AVE_TYPE long | |
171 | #endif | |
172 | ||
173 | #ifdef decstation | |
174 | #define LOAD_AVE_TYPE long | |
175 | #endif | |
176 | ||
177 | #ifdef _SEQUENT_ | |
178 | #define LOAD_AVE_TYPE long | |
179 | #endif | |
180 | ||
181 | #ifdef sgi | |
182 | #define LOAD_AVE_TYPE long | |
183 | #endif | |
184 | ||
185 | #ifdef SVR4 | |
186 | #define LOAD_AVE_TYPE long | |
187 | #endif | |
188 | ||
189 | #ifdef sony_news | |
190 | #define LOAD_AVE_TYPE long | |
191 | #endif | |
192 | ||
193 | #ifdef sequent | |
194 | #define LOAD_AVE_TYPE long | |
195 | #endif | |
196 | ||
197 | #ifdef OSF_ALPHA | |
198 | #define LOAD_AVE_TYPE long | |
199 | #endif | |
200 | ||
5ac622b2 | 201 | #if defined (ardent) && defined (titan) |
8eda6c51 JB |
202 | #define LOAD_AVE_TYPE long |
203 | #endif | |
204 | ||
5ac622b2 | 205 | #ifdef tek4300 |
1e5ba5b5 RM |
206 | #define LOAD_AVE_TYPE long |
207 | #endif | |
208 | ||
59c0e567 RM |
209 | #if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
210 | #define LOAD_AVE_TYPE long | |
211 | #endif | |
212 | ||
5ac622b2 | 213 | #endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 214 | |
f870f3fe RM |
215 | #ifdef OSF_ALPHA |
216 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, | |
217 | according to ghazi@noc.rutgers.edu. */ | |
218 | #undef FSCALE | |
219 | #define FSCALE 1024.0 | |
220 | #endif | |
221 | ||
bf074c06 RM |
222 | #if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
223 | /* <sys/param.h> defines an incorrect value for FSCALE on an | |
224 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
225 | #undef FSCALE | |
226 | #define FSCALE 100.0 | |
227 | #endif | |
228 | ||
f870f3fe | 229 | |
1e5ba5b5 RM |
230 | #ifndef FSCALE |
231 | ||
232 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
233 | ||
234 | #ifdef MORE_BSD | |
235 | #define FSCALE 2048.0 | |
236 | #endif | |
237 | ||
238 | #if defined(MIPS) || defined(SVR4) || defined(decstation) | |
239 | #define FSCALE 256 | |
240 | #endif | |
241 | ||
242 | #if defined (sgi) || defined (sequent) | |
934d56b7 RM |
243 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
244 | above under #ifdef MIPS. But we want the sgi value. */ | |
245 | #undef FSCALE | |
1e5ba5b5 RM |
246 | #define FSCALE 1000.0 |
247 | #endif | |
248 | ||
249 | #if defined (ardent) && defined (titan) | |
250 | #define FSCALE 65536.0 | |
251 | #endif | |
252 | ||
253 | #ifdef tek4300 | |
254 | #define FSCALE 100.0 | |
59c0e567 RM |
255 | #endif |
256 | ||
1e5ba5b5 RM |
257 | #endif /* Not FSCALE. */ |
258 | ||
259 | #if !defined (LDAV_CVT) && defined (FSCALE) | |
260 | #define LDAV_CVT(n) (((double) (n)) / FSCALE) | |
261 | #endif | |
262 | ||
8eda6c51 JB |
263 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ |
264 | #ifndef NLIST_STRUCT | |
265 | ||
266 | #ifdef MORE_BSD | |
267 | #define NLIST_STRUCT | |
268 | #endif | |
269 | ||
270 | #ifdef sun | |
271 | #define NLIST_STRUCT | |
272 | #endif | |
273 | ||
274 | #ifdef decstation | |
275 | #define NLIST_STRUCT | |
276 | #endif | |
277 | ||
278 | #ifdef hpux | |
279 | #define NLIST_STRUCT | |
280 | #endif | |
281 | ||
282 | #if defined (_SEQUENT_) || defined (sequent) | |
283 | #define NLIST_STRUCT | |
284 | #endif | |
285 | ||
286 | #ifdef sgi | |
287 | #define NLIST_STRUCT | |
288 | #endif | |
289 | ||
290 | #ifdef SVR4 | |
1e5ba5b5 RM |
291 | #define NLIST_STRUCT |
292 | #endif | |
293 | ||
8eda6c51 JB |
294 | #ifdef sony_news |
295 | #define NLIST_STRUCT | |
296 | #endif | |
297 | ||
298 | #ifdef OSF_ALPHA | |
299 | #define NLIST_STRUCT | |
300 | #endif | |
301 | ||
302 | #if defined (ardent) && defined (titan) | |
303 | #define NLIST_STRUCT | |
304 | #endif | |
305 | ||
59c0e567 | 306 | #ifdef tek4300 |
8eda6c51 JB |
307 | #define NLIST_STRUCT |
308 | #endif | |
309 | ||
310 | #ifdef butterfly | |
311 | #define NLIST_STRUCT | |
312 | #endif | |
313 | ||
59c0e567 RM |
314 | #if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
315 | #define NLIST_STRUCT | |
316 | #endif | |
317 | ||
8eda6c51 JB |
318 | #endif /* defined (NLIST_STRUCT) */ |
319 | ||
1e5ba5b5 RM |
320 | |
321 | #if defined(sgi) || (defined(mips) && !defined(BSD)) | |
322 | #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
323 | #endif | |
324 | ||
325 | ||
326 | #if !defined (KERNEL_FILE) && defined (sequent) | |
327 | #define KERNEL_FILE "/dynix" | |
328 | #endif | |
329 | ||
330 | #if !defined (KERNEL_FILE) && defined (hpux) | |
331 | #define KERNEL_FILE "/hp-ux" | |
332 | #endif | |
333 | ||
334 | #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan))) | |
335 | #define KERNEL_FILE "/unix" | |
336 | #endif | |
337 | ||
338 | ||
339 | #if !defined (LDAV_SYMBOL) && defined (alliant) | |
340 | #define LDAV_SYMBOL "_Loadavg" | |
341 | #endif | |
342 | ||
343 | #if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan))) | |
344 | #define LDAV_SYMBOL "avenrun" | |
345 | #endif | |
346 | ||
347 | #ifdef HAVE_UNISTD_H | |
348 | #include <unistd.h> | |
349 | #endif | |
350 | ||
351 | #include <stdio.h> | |
1e5ba5b5 RM |
352 | |
353 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
354 | nlist method. */ | |
355 | #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) | |
356 | #define LOAD_AVE_TYPE double | |
357 | #endif | |
358 | ||
359 | #ifdef LOAD_AVE_TYPE | |
360 | ||
361 | #ifndef VMS | |
362 | #ifndef NLIST_STRUCT | |
363 | #include <a.out.h> | |
364 | #else /* NLIST_STRUCT */ | |
365 | #include <nlist.h> | |
366 | #endif /* NLIST_STRUCT */ | |
367 | ||
368 | #ifdef SUNOS_5 | |
369 | #include <fcntl.h> | |
370 | #include <kvm.h> | |
371 | #endif | |
372 | ||
373 | #ifndef KERNEL_FILE | |
374 | #define KERNEL_FILE "/vmunix" | |
375 | #endif /* KERNEL_FILE */ | |
376 | ||
377 | #ifndef LDAV_SYMBOL | |
378 | #define LDAV_SYMBOL "_avenrun" | |
379 | #endif /* LDAV_SYMBOL */ | |
380 | ||
381 | #else /* VMS */ | |
382 | ||
383 | #ifndef eunice | |
384 | #include <iodef.h> | |
385 | #include <descrip.h> | |
386 | #else /* eunice */ | |
387 | #include <vms/iodef.h> | |
388 | #endif /* eunice */ | |
389 | #endif /* VMS */ | |
390 | ||
391 | #ifndef LDAV_CVT | |
392 | #define LDAV_CVT(n) ((double) (n)) | |
393 | #endif /* !LDAV_CVT */ | |
394 | ||
395 | #endif /* LOAD_AVE_TYPE */ | |
396 | ||
397 | #ifdef NeXT | |
398 | #ifdef HAVE_MACH_MACH_H | |
399 | #include <mach/mach.h> | |
400 | #else | |
401 | #include <mach.h> | |
402 | #endif | |
403 | #endif /* NeXT */ | |
404 | ||
405 | #ifdef sgi | |
406 | #include <sys/sysmp.h> | |
407 | #endif /* sgi */ | |
408 | ||
409 | #ifdef UMAX | |
410 | #include <stdio.h> | |
411 | #include <signal.h> | |
412 | #include <sys/time.h> | |
413 | #include <sys/wait.h> | |
414 | #include <sys/syscall.h> | |
415 | ||
416 | #ifdef UMAX_43 | |
417 | #include <machine/cpu.h> | |
418 | #include <inq_stats/statistics.h> | |
419 | #include <inq_stats/sysstats.h> | |
420 | #include <inq_stats/cpustats.h> | |
421 | #include <inq_stats/procstats.h> | |
422 | #else /* Not UMAX_43. */ | |
423 | #include <sys/sysdefs.h> | |
424 | #include <sys/statistics.h> | |
425 | #include <sys/sysstats.h> | |
426 | #include <sys/cpudefs.h> | |
427 | #include <sys/cpustats.h> | |
428 | #include <sys/procstats.h> | |
429 | #endif /* Not UMAX_43. */ | |
430 | #endif /* UMAX */ | |
431 | ||
432 | #ifdef DGUX | |
433 | #include <sys/dg_sys_info.h> | |
434 | #endif | |
435 | ||
436 | #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
437 | #include <fcntl.h> | |
438 | #else | |
439 | #include <sys/file.h> | |
440 | #endif | |
441 | \f | |
442 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
443 | ||
444 | #ifdef NeXT | |
445 | static processor_set_t default_set; | |
446 | static int getloadavg_initialized; | |
447 | #endif /* NeXT */ | |
448 | ||
449 | #ifdef UMAX | |
450 | static unsigned int cpus = 0; | |
451 | static unsigned int samples; | |
452 | #endif /* UMAX */ | |
453 | ||
454 | #ifdef DGUX | |
455 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ | |
456 | #endif /* DGUX */ | |
457 | ||
458 | #ifdef LOAD_AVE_TYPE | |
459 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ | |
460 | static int channel; | |
461 | /* Nonzero iff channel is valid. */ | |
462 | static int getloadavg_initialized; | |
463 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
464 | static long offset; | |
465 | ||
466 | #if !defined(VMS) && !defined(sgi) | |
467 | static struct nlist nl[2]; | |
468 | #endif /* Not VMS or sgi */ | |
469 | ||
470 | #ifdef SUNOS_5 | |
471 | static kvm_t *kd; | |
472 | #endif /* SUNOS_5 */ | |
473 | ||
474 | #endif /* LOAD_AVE_TYPE */ | |
475 | \f | |
476 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
477 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 478 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
479 | or -1 if an error occurred. */ |
480 | ||
481 | int | |
482 | getloadavg (loadavg, nelem) | |
483 | double loadavg[]; | |
484 | int nelem; | |
485 | { | |
486 | int elem = 0; /* Return value. */ | |
487 | ||
7ee260fe RM |
488 | #ifdef NO_GET_LOAD_AVG |
489 | #define LDAV_DONE | |
490 | /* Set errno to zero to indicate that there was no particular error; | |
491 | this function just can't work at all on this system. */ | |
492 | errno = 0; | |
493 | elem = -1; | |
494 | #endif | |
495 | ||
22ddf250 | 496 | #if !defined (LDAV_DONE) && defined (__linux__) |
1e5ba5b5 RM |
497 | #define LDAV_DONE |
498 | #undef LOAD_AVE_TYPE | |
499 | ||
500 | #ifndef LINUX_LDAV_FILE | |
501 | #define LINUX_LDAV_FILE "/proc/loadavg" | |
502 | #endif | |
503 | ||
504 | char ldavgbuf[40]; | |
505 | double load_ave[3]; | |
506 | int fd, count; | |
507 | ||
508 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
509 | if (fd == -1) | |
510 | return -1; | |
511 | count = read (fd, ldavgbuf, 40); | |
512 | (void) close (fd); | |
513 | if (count <= 0) | |
514 | return -1; | |
515 | ||
516 | count = sscanf (ldavgbuf, "%lf %lf %lf", | |
517 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
518 | if (count < 1) | |
519 | return -1; | |
520 | ||
521 | for (elem = 0; elem < nelem && elem < count; elem++) | |
522 | loadavg[elem] = load_ave[elem]; | |
523 | ||
524 | return elem; | |
525 | ||
22ddf250 | 526 | #endif /* __linux__ */ |
1e5ba5b5 | 527 | |
9eb8034b RM |
528 | #if !defined (LDAV_DONE) && defined (__NetBSD__) |
529 | #define LDAV_DONE | |
530 | #undef LOAD_AVE_TYPE | |
531 | ||
532 | #ifndef NETBSD_LDAV_FILE | |
533 | #define NETBSD_LDAV_FILE "/kern/loadavg" | |
534 | #endif | |
535 | ||
536 | unsigned long int load_ave[3], scale; | |
537 | int count; | |
538 | FILE *fp; | |
539 | ||
8f090e85 | 540 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
541 | if (fp == NULL) |
542 | return -1; | |
543 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
544 | &load_ave[0], &load_ave[1], &load_ave[2], | |
545 | &scale); | |
546 | (void) fclose (fp); | |
547 | if (count != 4) | |
548 | return -1; | |
549 | ||
550 | for (elem = 0; elem < nelem; elem++) | |
551 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
552 | ||
553 | return elem; | |
554 | ||
555 | #endif /* __NetBSD__ */ | |
556 | ||
1e5ba5b5 RM |
557 | #if !defined (LDAV_DONE) && defined (NeXT) |
558 | #define LDAV_DONE | |
559 | /* The NeXT code was adapted from iscreen 3.2. */ | |
560 | ||
561 | host_t host; | |
562 | struct processor_set_basic_info info; | |
563 | unsigned info_count; | |
564 | ||
039e9c8b DM |
565 | /* We only know how to get the 1-minute average for this system, |
566 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
567 | |
568 | if (!getloadavg_initialized) | |
569 | { | |
570 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
571 | getloadavg_initialized = 1; | |
572 | } | |
573 | ||
574 | if (getloadavg_initialized) | |
575 | { | |
576 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
577 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
578 | (processor_set_info_t) &info, &info_count) | |
579 | != KERN_SUCCESS) | |
580 | getloadavg_initialized = 0; | |
581 | else | |
582 | { | |
583 | if (nelem > 0) | |
584 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
585 | } | |
586 | } | |
587 | ||
588 | if (!getloadavg_initialized) | |
589 | return -1; | |
590 | #endif /* NeXT */ | |
591 | ||
592 | #if !defined (LDAV_DONE) && defined (UMAX) | |
593 | #define LDAV_DONE | |
594 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not | |
595 | have a /dev/kmem. Information about the workings of the running kernel | |
596 | can be gathered with inq_stats system calls. | |
597 | We only know how to get the 1-minute average for this system. */ | |
598 | ||
599 | struct proc_summary proc_sum_data; | |
600 | struct stat_descr proc_info; | |
601 | double load; | |
602 | register unsigned int i, j; | |
603 | ||
604 | if (cpus == 0) | |
605 | { | |
606 | register unsigned int c, i; | |
607 | struct cpu_config conf; | |
608 | struct stat_descr desc; | |
609 | ||
610 | desc.sd_next = 0; | |
611 | desc.sd_subsys = SUBSYS_CPU; | |
612 | desc.sd_type = CPUTYPE_CONFIG; | |
613 | desc.sd_addr = (char *) &conf; | |
614 | desc.sd_size = sizeof conf; | |
615 | ||
616 | if (inq_stats (1, &desc)) | |
617 | return -1; | |
618 | ||
619 | c = 0; | |
620 | for (i = 0; i < conf.config_maxclass; ++i) | |
621 | { | |
622 | struct class_stats stats; | |
623 | bzero ((char *) &stats, sizeof stats); | |
624 | ||
625 | desc.sd_type = CPUTYPE_CLASS; | |
626 | desc.sd_objid = i; | |
627 | desc.sd_addr = (char *) &stats; | |
628 | desc.sd_size = sizeof stats; | |
629 | ||
630 | if (inq_stats (1, &desc)) | |
631 | return -1; | |
632 | ||
633 | c += stats.class_numcpus; | |
634 | } | |
635 | cpus = c; | |
636 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
637 | } | |
638 | ||
639 | proc_info.sd_next = 0; | |
640 | proc_info.sd_subsys = SUBSYS_PROC; | |
641 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
642 | proc_info.sd_addr = (char *) &proc_sum_data; | |
643 | proc_info.sd_size = sizeof (struct proc_summary); | |
644 | proc_info.sd_sizeused = 0; | |
645 | ||
646 | if (inq_stats (1, &proc_info) != 0) | |
647 | return -1; | |
648 | ||
649 | load = proc_sum_data.ps_nrunnable; | |
650 | j = 0; | |
651 | for (i = samples - 1; i > 0; --i) | |
652 | { | |
653 | load += proc_sum_data.ps_nrun[j]; | |
654 | if (j++ == PS_NRUNSIZE) | |
655 | j = 0; | |
656 | } | |
657 | ||
658 | if (nelem > 0) | |
659 | loadavg[elem++] = load / samples / cpus; | |
660 | #endif /* UMAX */ | |
661 | ||
662 | #if !defined (LDAV_DONE) && defined (DGUX) | |
663 | #define LDAV_DONE | |
664 | /* This call can return -1 for an error, but with good args | |
665 | it's not supposed to fail. The first argument is for no | |
666 | apparent reason of type `long int *'. */ | |
667 | dg_sys_info ((long int *) &load_info, | |
668 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
669 | DG_SYS_INFO_LOAD_VERSION_0); | |
670 | ||
671 | if (nelem > 0) | |
672 | loadavg[elem++] = load_info.one_minute; | |
673 | if (nelem > 1) | |
674 | loadavg[elem++] = load_info.five_minute; | |
675 | if (nelem > 2) | |
676 | loadavg[elem++] = load_info.fifteen_minute; | |
677 | #endif /* DGUX */ | |
678 | ||
679 | #if !defined (LDAV_DONE) && defined (apollo) | |
680 | #define LDAV_DONE | |
681 | /* Apollo code from lisch@mentorg.com (Ray Lischner). | |
682 | ||
683 | This system call is not documented. The load average is obtained as | |
684 | three long integers, for the load average over the past minute, | |
685 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
686 | with 16 bits of integer part and 16 bits of fraction part. | |
687 | ||
688 | I'm not sure which operating system first supported this system call, | |
689 | but I know that SR10.2 supports it. */ | |
690 | ||
691 | extern void proc1_$get_loadav (); | |
692 | unsigned long load_ave[3]; | |
693 | ||
694 | proc1_$get_loadav (load_ave); | |
695 | ||
696 | if (nelem > 0) | |
697 | loadavg[elem++] = load_ave[0] / 65536.0; | |
698 | if (nelem > 1) | |
699 | loadavg[elem++] = load_ave[1] / 65536.0; | |
700 | if (nelem > 2) | |
701 | loadavg[elem++] = load_ave[2] / 65536.0; | |
702 | #endif /* apollo */ | |
703 | ||
704 | #if !defined (LDAV_DONE) && defined (OSF_MIPS) | |
705 | #define LDAV_DONE | |
1e5ba5b5 RM |
706 | |
707 | struct tbl_loadavg load_ave; | |
708 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
709 | loadavg[elem++] |
710 | = (load_ave.tl_lscale == 0 | |
711 | ? load_ave.tl_avenrun.d[0] | |
712 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
1e5ba5b5 RM |
713 | #endif /* OSF_MIPS */ |
714 | ||
bbd619d7 RS |
715 | #if !defined (LDAV_DONE) && defined (OSF_ALPHA) |
716 | #define LDAV_DONE | |
717 | ||
718 | struct tbl_loadavg load_ave; | |
719 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
720 | for (elem = 0; elem < nelem; elem++) | |
721 | loadavg[elem] | |
722 | = (load_ave.tl_lscale == 0 | |
723 | ? load_ave.tl_avenrun.d[elem] | |
724 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
725 | #endif /* OSF_ALPHA */ | |
726 | ||
1e5ba5b5 RM |
727 | #if !defined (LDAV_DONE) && defined (VMS) |
728 | /* VMS specific code -- read from the Load Ave driver. */ | |
729 | ||
730 | LOAD_AVE_TYPE load_ave[3]; | |
731 | static int getloadavg_initialized = 0; | |
732 | #ifdef eunice | |
733 | struct | |
734 | { | |
735 | int dsc$w_length; | |
736 | char *dsc$a_pointer; | |
737 | } descriptor; | |
738 | #endif | |
739 | ||
740 | /* Ensure that there is a channel open to the load ave device. */ | |
741 | if (!getloadavg_initialized) | |
742 | { | |
743 | /* Attempt to open the channel. */ | |
744 | #ifdef eunice | |
745 | descriptor.dsc$w_length = 18; | |
746 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
747 | #else | |
748 | $DESCRIPTOR (descriptor, "LAV0:"); | |
749 | #endif | |
750 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) | |
751 | getloadavg_initialized = 1; | |
752 | } | |
753 | ||
754 | /* Read the load average vector. */ | |
755 | if (getloadavg_initialized | |
756 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
757 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
758 | { | |
759 | sys$dassgn (channel); | |
760 | getloadavg_initialized = 0; | |
761 | } | |
762 | ||
763 | if (!getloadavg_initialized) | |
764 | return -1; | |
765 | #endif /* VMS */ | |
766 | ||
767 | #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) | |
768 | ||
769 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
770 | ||
771 | #define LDAV_PRIVILEGED /* This code requires special installation. */ | |
772 | ||
773 | LOAD_AVE_TYPE load_ave[3]; | |
774 | ||
775 | /* Get the address of LDAV_SYMBOL. */ | |
776 | if (offset == 0) | |
777 | { | |
1e5ba5b5 RM |
778 | #ifndef sgi |
779 | #ifndef NLIST_STRUCT | |
780 | strcpy (nl[0].n_name, LDAV_SYMBOL); | |
781 | strcpy (nl[1].n_name, ""); | |
782 | #else /* NLIST_STRUCT */ | |
783 | #ifdef NLIST_NAME_UNION | |
784 | nl[0].n_un.n_name = LDAV_SYMBOL; | |
785 | nl[1].n_un.n_name = 0; | |
786 | #else /* not NLIST_NAME_UNION */ | |
787 | nl[0].n_name = LDAV_SYMBOL; | |
788 | nl[1].n_name = 0; | |
789 | #endif /* not NLIST_NAME_UNION */ | |
790 | #endif /* NLIST_STRUCT */ | |
791 | ||
fb3ebe6c | 792 | #ifndef SUNOS_5 |
1e5ba5b5 RM |
793 | if (nlist (KERNEL_FILE, nl) >= 0) |
794 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | |
795 | { | |
796 | #ifdef FIXUP_KERNEL_SYMBOL_ADDR | |
797 | FIXUP_KERNEL_SYMBOL_ADDR (nl); | |
798 | #endif | |
799 | offset = nl[0].n_value; | |
800 | } | |
fb3ebe6c | 801 | #endif /* !SUNOS_5 */ |
1e5ba5b5 RM |
802 | #else /* sgi */ |
803 | int ldav_off; | |
804 | ||
805 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | |
806 | if (ldav_off != -1) | |
807 | offset = (long) ldav_off & 0x7fffffff; | |
808 | #endif /* sgi */ | |
1e5ba5b5 RM |
809 | } |
810 | ||
811 | /* Make sure we have /dev/kmem open. */ | |
812 | if (!getloadavg_initialized) | |
813 | { | |
814 | #ifndef SUNOS_5 | |
815 | channel = open ("/dev/kmem", 0); | |
816 | if (channel >= 0) | |
817 | getloadavg_initialized = 1; | |
818 | #else /* SUNOS_5 */ | |
fb3ebe6c DM |
819 | /* We pass 0 for the kernel, corefile, and swapfile names |
820 | to use the currently running kernel. */ | |
1e5ba5b5 RM |
821 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
822 | if (kd != 0) | |
823 | { | |
fb3ebe6c | 824 | /* nlist the currently running kernel. */ |
1e5ba5b5 | 825 | kvm_nlist (kd, nl); |
fb3ebe6c | 826 | offset = nl[0].n_value; |
1e5ba5b5 RM |
827 | getloadavg_initialized = 1; |
828 | } | |
829 | #endif /* SUNOS_5 */ | |
830 | } | |
831 | ||
832 | /* If we can, get the load average values. */ | |
833 | if (offset && getloadavg_initialized) | |
834 | { | |
835 | /* Try to read the load. */ | |
836 | #ifndef SUNOS_5 | |
837 | if (lseek (channel, offset, 0) == -1L | |
838 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
839 | != sizeof (load_ave)) | |
840 | { | |
841 | close (channel); | |
842 | getloadavg_initialized = 0; | |
843 | } | |
844 | #else /* SUNOS_5 */ | |
845 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) | |
846 | != sizeof (load_ave)) | |
847 | { | |
848 | kvm_close (kd); | |
849 | getloadavg_initialized = 0; | |
850 | } | |
851 | #endif /* SUNOS_5 */ | |
852 | } | |
853 | ||
854 | if (offset == 0 || !getloadavg_initialized) | |
855 | return -1; | |
856 | #endif /* LOAD_AVE_TYPE and not VMS */ | |
857 | ||
858 | #if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ | |
859 | if (nelem > 0) | |
860 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
861 | if (nelem > 1) | |
862 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
863 | if (nelem > 2) | |
864 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
865 | ||
866 | #define LDAV_DONE | |
867 | #endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
868 | ||
869 | #ifdef LDAV_DONE | |
870 | return elem; | |
871 | #else | |
872 | /* Set errno to zero to indicate that there was no particular error; | |
873 | this function just can't work at all on this system. */ | |
874 | errno = 0; | |
875 | return -1; | |
876 | #endif | |
877 | } | |
04402ae3 RM |
878 | |
879 | #endif /* ! HAVE_GETLOADAVG */ | |
1e5ba5b5 RM |
880 | \f |
881 | #ifdef TEST | |
882 | void | |
883 | main (argc, argv) | |
884 | int argc; | |
885 | char **argv; | |
886 | { | |
887 | int naptime = 0; | |
888 | ||
889 | if (argc > 1) | |
890 | naptime = atoi (argv[1]); | |
891 | ||
1e5ba5b5 RM |
892 | while (1) |
893 | { | |
894 | double avg[3]; | |
895 | int loads; | |
896 | ||
897 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
898 | loads = getloadavg (avg, 3); | |
899 | if (loads == -1) | |
900 | { | |
901 | perror ("Error getting load average"); | |
902 | exit (1); | |
903 | } | |
904 | if (loads > 0) | |
905 | printf ("1-minute: %f ", avg[0]); | |
906 | if (loads > 1) | |
907 | printf ("5-minute: %f ", avg[1]); | |
908 | if (loads > 2) | |
909 | printf ("15-minute: %f ", avg[2]); | |
910 | if (loads > 0) | |
911 | putchar ('\n'); | |
db6730c7 RM |
912 | |
913 | if (naptime == 0) | |
914 | break; | |
1e5ba5b5 RM |
915 | sleep (naptime); |
916 | } | |
db6730c7 RM |
917 | |
918 | exit (0); | |
1e5ba5b5 RM |
919 | } |
920 | #endif /* TEST */ |