Commit | Line | Data |
---|---|---|
1e5ba5b5 | 1 | /* Get the system load averages. |
39c5a83f | 2 | Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994 |
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 | ||
62 | #include <sys/types.h> | |
63 | ||
64 | /* Both the Emacs and non-Emacs sections want this. Some | |
65 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
66 | sparc.h's) use macros like FSCALE, defined here. */ | |
67 | #ifdef unix | |
68 | #include <sys/param.h> | |
69 | #endif | |
70 | ||
71 | ||
72 | #ifdef HAVE_CONFIG_H | |
82cb56fb | 73 | #if defined (emacs) || defined (CONFIG_BROKETS) |
3070929a RM |
74 | /* We use <config.h> instead of "config.h" so that a compilation |
75 | using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h | |
82cb56fb | 76 | (which it would do because it found this file in $srcdir). */ |
3070929a | 77 | #include <config.h> |
82cb56fb RM |
78 | #else |
79 | #include "config.h" | |
80 | #endif | |
1e5ba5b5 RM |
81 | #endif |
82 | ||
04402ae3 | 83 | /* Exclude all the code except the test program at the end |
39c5a83f RM |
84 | if the system has its own `getloadavg' function. |
85 | ||
86 | The declaration of `errno' is needed by the test program | |
87 | as well as the function itself, so it comes first. */ | |
88 | ||
89 | #include <errno.h> | |
90 | ||
91 | #ifndef errno | |
92 | extern int errno; | |
93 | #endif | |
04402ae3 RM |
94 | |
95 | #ifndef HAVE_GETLOADAVG | |
96 | ||
97 | ||
1e5ba5b5 RM |
98 | /* The existing Emacs configuration files define a macro called |
99 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
100 | returns the load average multiplied by 100. What we actually want | |
101 | is a macro called LDAV_CVT, which returns the load average as an | |
102 | unmultiplied double. | |
103 | ||
104 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
105 | LOAD_AVE_CVT, but future machine config files should just define | |
106 | LDAV_CVT directly. */ | |
107 | ||
108 | #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) | |
109 | #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
110 | #endif | |
111 | ||
112 | #if !defined (BSD) && defined (ultrix) | |
113 | /* Ultrix behaves like BSD on Vaxen. */ | |
114 | #define BSD | |
115 | #endif | |
116 | ||
117 | #ifdef NeXT | |
118 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which | |
119 | conflicts with the definition understood in this file, that this | |
120 | really is BSD. */ | |
121 | #undef BSD | |
122 | ||
123 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
124 | defined to mean that the nlist method should be used, which is not true. */ | |
125 | #undef FSCALE | |
126 | #endif | |
127 | ||
128 | /* Set values that are different from the defaults, which are | |
129 | set a little farther down with #ifndef. */ | |
130 | ||
131 | ||
132 | /* Some shorthands. */ | |
133 | ||
134 | #if defined (HPUX) && !defined (hpux) | |
135 | #define hpux | |
136 | #endif | |
137 | ||
138 | #if defined(hp300) && !defined(hpux) | |
139 | #define MORE_BSD | |
140 | #endif | |
141 | ||
142 | #if defined(ultrix) && defined(mips) | |
143 | #define decstation | |
144 | #endif | |
145 | ||
146 | #if defined(sun) && defined(SVR4) | |
147 | #define SUNOS_5 | |
148 | #endif | |
149 | ||
d2a9653a | 150 | #if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
1e5ba5b5 RM |
151 | #define OSF_ALPHA |
152 | #endif | |
153 | ||
154 | #if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
155 | #define OSF_MIPS | |
156 | #include <sys/table.h> | |
157 | #endif | |
158 | ||
159 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
160 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
161 | that with a couple of other things and we'll have a unique match. */ | |
162 | #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) | |
163 | #define tek4300 /* Define by emacs, but not by other users. */ | |
164 | #endif | |
165 | ||
166 | ||
8eda6c51 | 167 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
5ac622b2 RM |
168 | #ifndef LOAD_AVE_TYPE |
169 | ||
8eda6c51 JB |
170 | #ifdef MORE_BSD |
171 | #define LOAD_AVE_TYPE long | |
172 | #endif | |
173 | ||
174 | #ifdef sun | |
175 | #define LOAD_AVE_TYPE long | |
176 | #endif | |
177 | ||
178 | #ifdef decstation | |
179 | #define LOAD_AVE_TYPE long | |
180 | #endif | |
181 | ||
182 | #ifdef _SEQUENT_ | |
183 | #define LOAD_AVE_TYPE long | |
184 | #endif | |
185 | ||
186 | #ifdef sgi | |
187 | #define LOAD_AVE_TYPE long | |
188 | #endif | |
189 | ||
190 | #ifdef SVR4 | |
191 | #define LOAD_AVE_TYPE long | |
192 | #endif | |
193 | ||
194 | #ifdef sony_news | |
195 | #define LOAD_AVE_TYPE long | |
196 | #endif | |
197 | ||
198 | #ifdef sequent | |
199 | #define LOAD_AVE_TYPE long | |
200 | #endif | |
201 | ||
202 | #ifdef OSF_ALPHA | |
203 | #define LOAD_AVE_TYPE long | |
204 | #endif | |
205 | ||
5ac622b2 | 206 | #if defined (ardent) && defined (titan) |
8eda6c51 JB |
207 | #define LOAD_AVE_TYPE long |
208 | #endif | |
209 | ||
5ac622b2 | 210 | #ifdef tek4300 |
1e5ba5b5 RM |
211 | #define LOAD_AVE_TYPE long |
212 | #endif | |
213 | ||
5ac622b2 | 214 | #endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 215 | |
f870f3fe RM |
216 | #ifdef OSF_ALPHA |
217 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, | |
218 | according to ghazi@noc.rutgers.edu. */ | |
219 | #undef FSCALE | |
220 | #define FSCALE 1024.0 | |
221 | #endif | |
222 | ||
223 | ||
1e5ba5b5 RM |
224 | #ifndef FSCALE |
225 | ||
226 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
227 | ||
228 | #ifdef MORE_BSD | |
229 | #define FSCALE 2048.0 | |
230 | #endif | |
231 | ||
232 | #if defined(MIPS) || defined(SVR4) || defined(decstation) | |
233 | #define FSCALE 256 | |
234 | #endif | |
235 | ||
236 | #if defined (sgi) || defined (sequent) | |
934d56b7 RM |
237 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
238 | above under #ifdef MIPS. But we want the sgi value. */ | |
239 | #undef FSCALE | |
1e5ba5b5 RM |
240 | #define FSCALE 1000.0 |
241 | #endif | |
242 | ||
243 | #if defined (ardent) && defined (titan) | |
244 | #define FSCALE 65536.0 | |
245 | #endif | |
246 | ||
247 | #ifdef tek4300 | |
248 | #define FSCALE 100.0 | |
249 | #endif | |
250 | ||
251 | #endif /* Not FSCALE. */ | |
252 | ||
253 | #if !defined (LDAV_CVT) && defined (FSCALE) | |
254 | #define LDAV_CVT(n) (((double) (n)) / FSCALE) | |
255 | #endif | |
256 | ||
8eda6c51 JB |
257 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ |
258 | #ifndef NLIST_STRUCT | |
259 | ||
260 | #ifdef MORE_BSD | |
261 | #define NLIST_STRUCT | |
262 | #endif | |
263 | ||
264 | #ifdef sun | |
265 | #define NLIST_STRUCT | |
266 | #endif | |
267 | ||
268 | #ifdef decstation | |
269 | #define NLIST_STRUCT | |
270 | #endif | |
271 | ||
272 | #ifdef hpux | |
273 | #define NLIST_STRUCT | |
274 | #endif | |
275 | ||
276 | #if defined (_SEQUENT_) || defined (sequent) | |
277 | #define NLIST_STRUCT | |
278 | #endif | |
279 | ||
280 | #ifdef sgi | |
281 | #define NLIST_STRUCT | |
282 | #endif | |
283 | ||
284 | #ifdef SVR4 | |
1e5ba5b5 RM |
285 | #define NLIST_STRUCT |
286 | #endif | |
287 | ||
8eda6c51 JB |
288 | #ifdef sony_news |
289 | #define NLIST_STRUCT | |
290 | #endif | |
291 | ||
292 | #ifdef OSF_ALPHA | |
293 | #define NLIST_STRUCT | |
294 | #endif | |
295 | ||
296 | #if defined (ardent) && defined (titan) | |
297 | #define NLIST_STRUCT | |
298 | #endif | |
299 | ||
300 | #ifdef tex4300 | |
301 | #define NLIST_STRUCT | |
302 | #endif | |
303 | ||
304 | #ifdef butterfly | |
305 | #define NLIST_STRUCT | |
306 | #endif | |
307 | ||
308 | #endif /* defined (NLIST_STRUCT) */ | |
309 | ||
1e5ba5b5 RM |
310 | |
311 | #if defined(sgi) || (defined(mips) && !defined(BSD)) | |
312 | #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
313 | #endif | |
314 | ||
315 | ||
316 | #if !defined (KERNEL_FILE) && defined (sequent) | |
317 | #define KERNEL_FILE "/dynix" | |
318 | #endif | |
319 | ||
320 | #if !defined (KERNEL_FILE) && defined (hpux) | |
321 | #define KERNEL_FILE "/hp-ux" | |
322 | #endif | |
323 | ||
324 | #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan))) | |
325 | #define KERNEL_FILE "/unix" | |
326 | #endif | |
327 | ||
328 | ||
329 | #if !defined (LDAV_SYMBOL) && defined (alliant) | |
330 | #define LDAV_SYMBOL "_Loadavg" | |
331 | #endif | |
332 | ||
333 | #if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan))) | |
334 | #define LDAV_SYMBOL "avenrun" | |
335 | #endif | |
336 | ||
337 | #ifdef HAVE_UNISTD_H | |
338 | #include <unistd.h> | |
339 | #endif | |
340 | ||
341 | #include <stdio.h> | |
1e5ba5b5 RM |
342 | |
343 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
344 | nlist method. */ | |
345 | #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) | |
346 | #define LOAD_AVE_TYPE double | |
347 | #endif | |
348 | ||
349 | #ifdef LOAD_AVE_TYPE | |
350 | ||
351 | #ifndef VMS | |
352 | #ifndef NLIST_STRUCT | |
353 | #include <a.out.h> | |
354 | #else /* NLIST_STRUCT */ | |
355 | #include <nlist.h> | |
356 | #endif /* NLIST_STRUCT */ | |
357 | ||
358 | #ifdef SUNOS_5 | |
359 | #include <fcntl.h> | |
360 | #include <kvm.h> | |
361 | #endif | |
362 | ||
363 | #ifndef KERNEL_FILE | |
364 | #define KERNEL_FILE "/vmunix" | |
365 | #endif /* KERNEL_FILE */ | |
366 | ||
367 | #ifndef LDAV_SYMBOL | |
368 | #define LDAV_SYMBOL "_avenrun" | |
369 | #endif /* LDAV_SYMBOL */ | |
370 | ||
371 | #else /* VMS */ | |
372 | ||
373 | #ifndef eunice | |
374 | #include <iodef.h> | |
375 | #include <descrip.h> | |
376 | #else /* eunice */ | |
377 | #include <vms/iodef.h> | |
378 | #endif /* eunice */ | |
379 | #endif /* VMS */ | |
380 | ||
381 | #ifndef LDAV_CVT | |
382 | #define LDAV_CVT(n) ((double) (n)) | |
383 | #endif /* !LDAV_CVT */ | |
384 | ||
385 | #endif /* LOAD_AVE_TYPE */ | |
386 | ||
387 | #ifdef NeXT | |
388 | #ifdef HAVE_MACH_MACH_H | |
389 | #include <mach/mach.h> | |
390 | #else | |
391 | #include <mach.h> | |
392 | #endif | |
393 | #endif /* NeXT */ | |
394 | ||
395 | #ifdef sgi | |
396 | #include <sys/sysmp.h> | |
397 | #endif /* sgi */ | |
398 | ||
399 | #ifdef UMAX | |
400 | #include <stdio.h> | |
401 | #include <signal.h> | |
402 | #include <sys/time.h> | |
403 | #include <sys/wait.h> | |
404 | #include <sys/syscall.h> | |
405 | ||
406 | #ifdef UMAX_43 | |
407 | #include <machine/cpu.h> | |
408 | #include <inq_stats/statistics.h> | |
409 | #include <inq_stats/sysstats.h> | |
410 | #include <inq_stats/cpustats.h> | |
411 | #include <inq_stats/procstats.h> | |
412 | #else /* Not UMAX_43. */ | |
413 | #include <sys/sysdefs.h> | |
414 | #include <sys/statistics.h> | |
415 | #include <sys/sysstats.h> | |
416 | #include <sys/cpudefs.h> | |
417 | #include <sys/cpustats.h> | |
418 | #include <sys/procstats.h> | |
419 | #endif /* Not UMAX_43. */ | |
420 | #endif /* UMAX */ | |
421 | ||
422 | #ifdef DGUX | |
423 | #include <sys/dg_sys_info.h> | |
424 | #endif | |
425 | ||
426 | #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
427 | #include <fcntl.h> | |
428 | #else | |
429 | #include <sys/file.h> | |
430 | #endif | |
431 | \f | |
432 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
433 | ||
434 | #ifdef NeXT | |
435 | static processor_set_t default_set; | |
436 | static int getloadavg_initialized; | |
437 | #endif /* NeXT */ | |
438 | ||
439 | #ifdef UMAX | |
440 | static unsigned int cpus = 0; | |
441 | static unsigned int samples; | |
442 | #endif /* UMAX */ | |
443 | ||
444 | #ifdef DGUX | |
445 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ | |
446 | #endif /* DGUX */ | |
447 | ||
448 | #ifdef LOAD_AVE_TYPE | |
449 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ | |
450 | static int channel; | |
451 | /* Nonzero iff channel is valid. */ | |
452 | static int getloadavg_initialized; | |
453 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
454 | static long offset; | |
455 | ||
456 | #if !defined(VMS) && !defined(sgi) | |
457 | static struct nlist nl[2]; | |
458 | #endif /* Not VMS or sgi */ | |
459 | ||
460 | #ifdef SUNOS_5 | |
461 | static kvm_t *kd; | |
462 | #endif /* SUNOS_5 */ | |
463 | ||
464 | #endif /* LOAD_AVE_TYPE */ | |
465 | \f | |
466 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
467 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 468 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
469 | or -1 if an error occurred. */ |
470 | ||
471 | int | |
472 | getloadavg (loadavg, nelem) | |
473 | double loadavg[]; | |
474 | int nelem; | |
475 | { | |
476 | int elem = 0; /* Return value. */ | |
477 | ||
7ee260fe RM |
478 | #ifdef NO_GET_LOAD_AVG |
479 | #define LDAV_DONE | |
480 | /* Set errno to zero to indicate that there was no particular error; | |
481 | this function just can't work at all on this system. */ | |
482 | errno = 0; | |
483 | elem = -1; | |
484 | #endif | |
485 | ||
22ddf250 | 486 | #if !defined (LDAV_DONE) && defined (__linux__) |
1e5ba5b5 RM |
487 | #define LDAV_DONE |
488 | #undef LOAD_AVE_TYPE | |
489 | ||
490 | #ifndef LINUX_LDAV_FILE | |
491 | #define LINUX_LDAV_FILE "/proc/loadavg" | |
492 | #endif | |
493 | ||
494 | char ldavgbuf[40]; | |
495 | double load_ave[3]; | |
496 | int fd, count; | |
497 | ||
498 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
499 | if (fd == -1) | |
500 | return -1; | |
501 | count = read (fd, ldavgbuf, 40); | |
502 | (void) close (fd); | |
503 | if (count <= 0) | |
504 | return -1; | |
505 | ||
506 | count = sscanf (ldavgbuf, "%lf %lf %lf", | |
507 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
508 | if (count < 1) | |
509 | return -1; | |
510 | ||
511 | for (elem = 0; elem < nelem && elem < count; elem++) | |
512 | loadavg[elem] = load_ave[elem]; | |
513 | ||
514 | return elem; | |
515 | ||
22ddf250 | 516 | #endif /* __linux__ */ |
1e5ba5b5 | 517 | |
9eb8034b RM |
518 | #if !defined (LDAV_DONE) && defined (__NetBSD__) |
519 | #define LDAV_DONE | |
520 | #undef LOAD_AVE_TYPE | |
521 | ||
522 | #ifndef NETBSD_LDAV_FILE | |
523 | #define NETBSD_LDAV_FILE "/kern/loadavg" | |
524 | #endif | |
525 | ||
526 | unsigned long int load_ave[3], scale; | |
527 | int count; | |
528 | FILE *fp; | |
529 | ||
8f090e85 | 530 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
531 | if (fp == NULL) |
532 | return -1; | |
533 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
534 | &load_ave[0], &load_ave[1], &load_ave[2], | |
535 | &scale); | |
536 | (void) fclose (fp); | |
537 | if (count != 4) | |
538 | return -1; | |
539 | ||
540 | for (elem = 0; elem < nelem; elem++) | |
541 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
542 | ||
543 | return elem; | |
544 | ||
545 | #endif /* __NetBSD__ */ | |
546 | ||
1e5ba5b5 RM |
547 | #if !defined (LDAV_DONE) && defined (NeXT) |
548 | #define LDAV_DONE | |
549 | /* The NeXT code was adapted from iscreen 3.2. */ | |
550 | ||
551 | host_t host; | |
552 | struct processor_set_basic_info info; | |
553 | unsigned info_count; | |
554 | ||
039e9c8b DM |
555 | /* We only know how to get the 1-minute average for this system, |
556 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
557 | |
558 | if (!getloadavg_initialized) | |
559 | { | |
560 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
561 | getloadavg_initialized = 1; | |
562 | } | |
563 | ||
564 | if (getloadavg_initialized) | |
565 | { | |
566 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
567 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
568 | (processor_set_info_t) &info, &info_count) | |
569 | != KERN_SUCCESS) | |
570 | getloadavg_initialized = 0; | |
571 | else | |
572 | { | |
573 | if (nelem > 0) | |
574 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
575 | } | |
576 | } | |
577 | ||
578 | if (!getloadavg_initialized) | |
579 | return -1; | |
580 | #endif /* NeXT */ | |
581 | ||
582 | #if !defined (LDAV_DONE) && defined (UMAX) | |
583 | #define LDAV_DONE | |
584 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not | |
585 | have a /dev/kmem. Information about the workings of the running kernel | |
586 | can be gathered with inq_stats system calls. | |
587 | We only know how to get the 1-minute average for this system. */ | |
588 | ||
589 | struct proc_summary proc_sum_data; | |
590 | struct stat_descr proc_info; | |
591 | double load; | |
592 | register unsigned int i, j; | |
593 | ||
594 | if (cpus == 0) | |
595 | { | |
596 | register unsigned int c, i; | |
597 | struct cpu_config conf; | |
598 | struct stat_descr desc; | |
599 | ||
600 | desc.sd_next = 0; | |
601 | desc.sd_subsys = SUBSYS_CPU; | |
602 | desc.sd_type = CPUTYPE_CONFIG; | |
603 | desc.sd_addr = (char *) &conf; | |
604 | desc.sd_size = sizeof conf; | |
605 | ||
606 | if (inq_stats (1, &desc)) | |
607 | return -1; | |
608 | ||
609 | c = 0; | |
610 | for (i = 0; i < conf.config_maxclass; ++i) | |
611 | { | |
612 | struct class_stats stats; | |
613 | bzero ((char *) &stats, sizeof stats); | |
614 | ||
615 | desc.sd_type = CPUTYPE_CLASS; | |
616 | desc.sd_objid = i; | |
617 | desc.sd_addr = (char *) &stats; | |
618 | desc.sd_size = sizeof stats; | |
619 | ||
620 | if (inq_stats (1, &desc)) | |
621 | return -1; | |
622 | ||
623 | c += stats.class_numcpus; | |
624 | } | |
625 | cpus = c; | |
626 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
627 | } | |
628 | ||
629 | proc_info.sd_next = 0; | |
630 | proc_info.sd_subsys = SUBSYS_PROC; | |
631 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
632 | proc_info.sd_addr = (char *) &proc_sum_data; | |
633 | proc_info.sd_size = sizeof (struct proc_summary); | |
634 | proc_info.sd_sizeused = 0; | |
635 | ||
636 | if (inq_stats (1, &proc_info) != 0) | |
637 | return -1; | |
638 | ||
639 | load = proc_sum_data.ps_nrunnable; | |
640 | j = 0; | |
641 | for (i = samples - 1; i > 0; --i) | |
642 | { | |
643 | load += proc_sum_data.ps_nrun[j]; | |
644 | if (j++ == PS_NRUNSIZE) | |
645 | j = 0; | |
646 | } | |
647 | ||
648 | if (nelem > 0) | |
649 | loadavg[elem++] = load / samples / cpus; | |
650 | #endif /* UMAX */ | |
651 | ||
652 | #if !defined (LDAV_DONE) && defined (DGUX) | |
653 | #define LDAV_DONE | |
654 | /* This call can return -1 for an error, but with good args | |
655 | it's not supposed to fail. The first argument is for no | |
656 | apparent reason of type `long int *'. */ | |
657 | dg_sys_info ((long int *) &load_info, | |
658 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
659 | DG_SYS_INFO_LOAD_VERSION_0); | |
660 | ||
661 | if (nelem > 0) | |
662 | loadavg[elem++] = load_info.one_minute; | |
663 | if (nelem > 1) | |
664 | loadavg[elem++] = load_info.five_minute; | |
665 | if (nelem > 2) | |
666 | loadavg[elem++] = load_info.fifteen_minute; | |
667 | #endif /* DGUX */ | |
668 | ||
669 | #if !defined (LDAV_DONE) && defined (apollo) | |
670 | #define LDAV_DONE | |
671 | /* Apollo code from lisch@mentorg.com (Ray Lischner). | |
672 | ||
673 | This system call is not documented. The load average is obtained as | |
674 | three long integers, for the load average over the past minute, | |
675 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
676 | with 16 bits of integer part and 16 bits of fraction part. | |
677 | ||
678 | I'm not sure which operating system first supported this system call, | |
679 | but I know that SR10.2 supports it. */ | |
680 | ||
681 | extern void proc1_$get_loadav (); | |
682 | unsigned long load_ave[3]; | |
683 | ||
684 | proc1_$get_loadav (load_ave); | |
685 | ||
686 | if (nelem > 0) | |
687 | loadavg[elem++] = load_ave[0] / 65536.0; | |
688 | if (nelem > 1) | |
689 | loadavg[elem++] = load_ave[1] / 65536.0; | |
690 | if (nelem > 2) | |
691 | loadavg[elem++] = load_ave[2] / 65536.0; | |
692 | #endif /* apollo */ | |
693 | ||
694 | #if !defined (LDAV_DONE) && defined (OSF_MIPS) | |
695 | #define LDAV_DONE | |
1e5ba5b5 RM |
696 | |
697 | struct tbl_loadavg load_ave; | |
698 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
699 | loadavg[elem++] |
700 | = (load_ave.tl_lscale == 0 | |
701 | ? load_ave.tl_avenrun.d[0] | |
702 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
1e5ba5b5 RM |
703 | #endif /* OSF_MIPS */ |
704 | ||
705 | #if !defined (LDAV_DONE) && defined (VMS) | |
706 | /* VMS specific code -- read from the Load Ave driver. */ | |
707 | ||
708 | LOAD_AVE_TYPE load_ave[3]; | |
709 | static int getloadavg_initialized = 0; | |
710 | #ifdef eunice | |
711 | struct | |
712 | { | |
713 | int dsc$w_length; | |
714 | char *dsc$a_pointer; | |
715 | } descriptor; | |
716 | #endif | |
717 | ||
718 | /* Ensure that there is a channel open to the load ave device. */ | |
719 | if (!getloadavg_initialized) | |
720 | { | |
721 | /* Attempt to open the channel. */ | |
722 | #ifdef eunice | |
723 | descriptor.dsc$w_length = 18; | |
724 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
725 | #else | |
726 | $DESCRIPTOR (descriptor, "LAV0:"); | |
727 | #endif | |
728 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) | |
729 | getloadavg_initialized = 1; | |
730 | } | |
731 | ||
732 | /* Read the load average vector. */ | |
733 | if (getloadavg_initialized | |
734 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
735 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
736 | { | |
737 | sys$dassgn (channel); | |
738 | getloadavg_initialized = 0; | |
739 | } | |
740 | ||
741 | if (!getloadavg_initialized) | |
742 | return -1; | |
743 | #endif /* VMS */ | |
744 | ||
745 | #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) | |
746 | ||
747 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
748 | ||
749 | #define LDAV_PRIVILEGED /* This code requires special installation. */ | |
750 | ||
751 | LOAD_AVE_TYPE load_ave[3]; | |
752 | ||
753 | /* Get the address of LDAV_SYMBOL. */ | |
754 | if (offset == 0) | |
755 | { | |
1e5ba5b5 RM |
756 | #ifndef sgi |
757 | #ifndef NLIST_STRUCT | |
758 | strcpy (nl[0].n_name, LDAV_SYMBOL); | |
759 | strcpy (nl[1].n_name, ""); | |
760 | #else /* NLIST_STRUCT */ | |
761 | #ifdef NLIST_NAME_UNION | |
762 | nl[0].n_un.n_name = LDAV_SYMBOL; | |
763 | nl[1].n_un.n_name = 0; | |
764 | #else /* not NLIST_NAME_UNION */ | |
765 | nl[0].n_name = LDAV_SYMBOL; | |
766 | nl[1].n_name = 0; | |
767 | #endif /* not NLIST_NAME_UNION */ | |
768 | #endif /* NLIST_STRUCT */ | |
769 | ||
fb3ebe6c | 770 | #ifndef SUNOS_5 |
1e5ba5b5 RM |
771 | if (nlist (KERNEL_FILE, nl) >= 0) |
772 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | |
773 | { | |
774 | #ifdef FIXUP_KERNEL_SYMBOL_ADDR | |
775 | FIXUP_KERNEL_SYMBOL_ADDR (nl); | |
776 | #endif | |
777 | offset = nl[0].n_value; | |
778 | } | |
fb3ebe6c | 779 | #endif /* !SUNOS_5 */ |
1e5ba5b5 RM |
780 | #else /* sgi */ |
781 | int ldav_off; | |
782 | ||
783 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | |
784 | if (ldav_off != -1) | |
785 | offset = (long) ldav_off & 0x7fffffff; | |
786 | #endif /* sgi */ | |
1e5ba5b5 RM |
787 | } |
788 | ||
789 | /* Make sure we have /dev/kmem open. */ | |
790 | if (!getloadavg_initialized) | |
791 | { | |
792 | #ifndef SUNOS_5 | |
793 | channel = open ("/dev/kmem", 0); | |
794 | if (channel >= 0) | |
795 | getloadavg_initialized = 1; | |
796 | #else /* SUNOS_5 */ | |
fb3ebe6c DM |
797 | /* We pass 0 for the kernel, corefile, and swapfile names |
798 | to use the currently running kernel. */ | |
1e5ba5b5 RM |
799 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
800 | if (kd != 0) | |
801 | { | |
fb3ebe6c | 802 | /* nlist the currently running kernel. */ |
1e5ba5b5 | 803 | kvm_nlist (kd, nl); |
fb3ebe6c | 804 | offset = nl[0].n_value; |
1e5ba5b5 RM |
805 | getloadavg_initialized = 1; |
806 | } | |
807 | #endif /* SUNOS_5 */ | |
808 | } | |
809 | ||
810 | /* If we can, get the load average values. */ | |
811 | if (offset && getloadavg_initialized) | |
812 | { | |
813 | /* Try to read the load. */ | |
814 | #ifndef SUNOS_5 | |
815 | if (lseek (channel, offset, 0) == -1L | |
816 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
817 | != sizeof (load_ave)) | |
818 | { | |
819 | close (channel); | |
820 | getloadavg_initialized = 0; | |
821 | } | |
822 | #else /* SUNOS_5 */ | |
823 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) | |
824 | != sizeof (load_ave)) | |
825 | { | |
826 | kvm_close (kd); | |
827 | getloadavg_initialized = 0; | |
828 | } | |
829 | #endif /* SUNOS_5 */ | |
830 | } | |
831 | ||
832 | if (offset == 0 || !getloadavg_initialized) | |
833 | return -1; | |
834 | #endif /* LOAD_AVE_TYPE and not VMS */ | |
835 | ||
836 | #if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ | |
837 | if (nelem > 0) | |
838 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
839 | if (nelem > 1) | |
840 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
841 | if (nelem > 2) | |
842 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
843 | ||
844 | #define LDAV_DONE | |
845 | #endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
846 | ||
847 | #ifdef LDAV_DONE | |
848 | return elem; | |
849 | #else | |
850 | /* Set errno to zero to indicate that there was no particular error; | |
851 | this function just can't work at all on this system. */ | |
852 | errno = 0; | |
853 | return -1; | |
854 | #endif | |
855 | } | |
04402ae3 RM |
856 | |
857 | #endif /* ! HAVE_GETLOADAVG */ | |
1e5ba5b5 RM |
858 | \f |
859 | #ifdef TEST | |
860 | void | |
861 | main (argc, argv) | |
862 | int argc; | |
863 | char **argv; | |
864 | { | |
865 | int naptime = 0; | |
866 | ||
867 | if (argc > 1) | |
868 | naptime = atoi (argv[1]); | |
869 | ||
1e5ba5b5 RM |
870 | while (1) |
871 | { | |
872 | double avg[3]; | |
873 | int loads; | |
874 | ||
875 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
876 | loads = getloadavg (avg, 3); | |
877 | if (loads == -1) | |
878 | { | |
879 | perror ("Error getting load average"); | |
880 | exit (1); | |
881 | } | |
882 | if (loads > 0) | |
883 | printf ("1-minute: %f ", avg[0]); | |
884 | if (loads > 1) | |
885 | printf ("5-minute: %f ", avg[1]); | |
886 | if (loads > 2) | |
887 | printf ("15-minute: %f ", avg[2]); | |
888 | if (loads > 0) | |
889 | putchar ('\n'); | |
db6730c7 RM |
890 | |
891 | if (naptime == 0) | |
892 | break; | |
1e5ba5b5 RM |
893 | sleep (naptime); |
894 | } | |
db6730c7 RM |
895 | |
896 | exit (0); | |
1e5ba5b5 RM |
897 | } |
898 | #endif /* TEST */ |