Commit | Line | Data |
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1e5ba5b5 RM |
1 | /* Get the system load averages. |
2 | Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93 | |
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 RM |
53 | Support from Michael K. Johnson. |
54 | ||
55 | In addition, to avoid nesting many #ifdefs, we internally set | |
56 | LDAV_DONE to indicate that the load average has been computed. | |
57 | ||
58 | We also #define LDAV_PRIVILEGED if a program will require | |
59 | special installation to be able to call getloadavg. */ | |
60 | ||
61 | #include <sys/types.h> | |
62 | ||
63 | /* Both the Emacs and non-Emacs sections want this. Some | |
64 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
65 | sparc.h's) use macros like FSCALE, defined here. */ | |
66 | #ifdef unix | |
67 | #include <sys/param.h> | |
68 | #endif | |
69 | ||
70 | ||
71 | #ifdef HAVE_CONFIG_H | |
72 | #include "config.h" | |
73 | #endif | |
74 | ||
75 | /* The existing Emacs configuration files define a macro called | |
76 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
77 | returns the load average multiplied by 100. What we actually want | |
78 | is a macro called LDAV_CVT, which returns the load average as an | |
79 | unmultiplied double. | |
80 | ||
81 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
82 | LOAD_AVE_CVT, but future machine config files should just define | |
83 | LDAV_CVT directly. */ | |
84 | ||
85 | #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) | |
86 | #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
87 | #endif | |
88 | ||
89 | #if !defined (BSD) && defined (ultrix) | |
90 | /* Ultrix behaves like BSD on Vaxen. */ | |
91 | #define BSD | |
92 | #endif | |
93 | ||
94 | #ifdef NeXT | |
95 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which | |
96 | conflicts with the definition understood in this file, that this | |
97 | really is BSD. */ | |
98 | #undef BSD | |
99 | ||
100 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
101 | defined to mean that the nlist method should be used, which is not true. */ | |
102 | #undef FSCALE | |
103 | #endif | |
104 | ||
105 | /* Set values that are different from the defaults, which are | |
106 | set a little farther down with #ifndef. */ | |
107 | ||
108 | ||
109 | /* Some shorthands. */ | |
110 | ||
111 | #if defined (HPUX) && !defined (hpux) | |
112 | #define hpux | |
113 | #endif | |
114 | ||
115 | #if defined(hp300) && !defined(hpux) | |
116 | #define MORE_BSD | |
117 | #endif | |
118 | ||
119 | #if defined(ultrix) && defined(mips) | |
120 | #define decstation | |
121 | #endif | |
122 | ||
123 | #if defined(sun) && defined(SVR4) | |
124 | #define SUNOS_5 | |
125 | #endif | |
126 | ||
d2a9653a | 127 | #if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
1e5ba5b5 RM |
128 | #define OSF_ALPHA |
129 | #endif | |
130 | ||
131 | #if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
132 | #define OSF_MIPS | |
133 | #include <sys/table.h> | |
134 | #endif | |
135 | ||
136 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
137 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
138 | that with a couple of other things and we'll have a unique match. */ | |
139 | #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) | |
140 | #define tek4300 /* Define by emacs, but not by other users. */ | |
141 | #endif | |
142 | ||
143 | ||
8eda6c51 | 144 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
5ac622b2 RM |
145 | #ifndef LOAD_AVE_TYPE |
146 | ||
8eda6c51 JB |
147 | #ifdef MORE_BSD |
148 | #define LOAD_AVE_TYPE long | |
149 | #endif | |
150 | ||
151 | #ifdef sun | |
152 | #define LOAD_AVE_TYPE long | |
153 | #endif | |
154 | ||
155 | #ifdef decstation | |
156 | #define LOAD_AVE_TYPE long | |
157 | #endif | |
158 | ||
159 | #ifdef _SEQUENT_ | |
160 | #define LOAD_AVE_TYPE long | |
161 | #endif | |
162 | ||
163 | #ifdef sgi | |
164 | #define LOAD_AVE_TYPE long | |
165 | #endif | |
166 | ||
167 | #ifdef SVR4 | |
168 | #define LOAD_AVE_TYPE long | |
169 | #endif | |
170 | ||
171 | #ifdef sony_news | |
172 | #define LOAD_AVE_TYPE long | |
173 | #endif | |
174 | ||
175 | #ifdef sequent | |
176 | #define LOAD_AVE_TYPE long | |
177 | #endif | |
178 | ||
179 | #ifdef OSF_ALPHA | |
180 | #define LOAD_AVE_TYPE long | |
181 | #endif | |
182 | ||
5ac622b2 | 183 | #if defined (ardent) && defined (titan) |
8eda6c51 JB |
184 | #define LOAD_AVE_TYPE long |
185 | #endif | |
186 | ||
5ac622b2 | 187 | #ifdef tek4300 |
1e5ba5b5 RM |
188 | #define LOAD_AVE_TYPE long |
189 | #endif | |
190 | ||
5ac622b2 | 191 | #endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 RM |
192 | |
193 | #ifndef FSCALE | |
194 | ||
195 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
196 | ||
197 | #ifdef MORE_BSD | |
198 | #define FSCALE 2048.0 | |
199 | #endif | |
200 | ||
201 | #if defined(MIPS) || defined(SVR4) || defined(decstation) | |
202 | #define FSCALE 256 | |
203 | #endif | |
204 | ||
205 | #if defined (sgi) || defined (sequent) | |
934d56b7 RM |
206 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
207 | above under #ifdef MIPS. But we want the sgi value. */ | |
208 | #undef FSCALE | |
1e5ba5b5 RM |
209 | #define FSCALE 1000.0 |
210 | #endif | |
211 | ||
212 | #if defined (ardent) && defined (titan) | |
213 | #define FSCALE 65536.0 | |
214 | #endif | |
215 | ||
216 | #ifdef tek4300 | |
217 | #define FSCALE 100.0 | |
218 | #endif | |
219 | ||
220 | #endif /* Not FSCALE. */ | |
221 | ||
222 | #if !defined (LDAV_CVT) && defined (FSCALE) | |
223 | #define LDAV_CVT(n) (((double) (n)) / FSCALE) | |
224 | #endif | |
225 | ||
8eda6c51 JB |
226 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ |
227 | #ifndef NLIST_STRUCT | |
228 | ||
229 | #ifdef MORE_BSD | |
230 | #define NLIST_STRUCT | |
231 | #endif | |
232 | ||
233 | #ifdef sun | |
234 | #define NLIST_STRUCT | |
235 | #endif | |
236 | ||
237 | #ifdef decstation | |
238 | #define NLIST_STRUCT | |
239 | #endif | |
240 | ||
241 | #ifdef hpux | |
242 | #define NLIST_STRUCT | |
243 | #endif | |
244 | ||
245 | #if defined (_SEQUENT_) || defined (sequent) | |
246 | #define NLIST_STRUCT | |
247 | #endif | |
248 | ||
249 | #ifdef sgi | |
250 | #define NLIST_STRUCT | |
251 | #endif | |
252 | ||
253 | #ifdef SVR4 | |
1e5ba5b5 RM |
254 | #define NLIST_STRUCT |
255 | #endif | |
256 | ||
8eda6c51 JB |
257 | #ifdef sony_news |
258 | #define NLIST_STRUCT | |
259 | #endif | |
260 | ||
261 | #ifdef OSF_ALPHA | |
262 | #define NLIST_STRUCT | |
263 | #endif | |
264 | ||
265 | #if defined (ardent) && defined (titan) | |
266 | #define NLIST_STRUCT | |
267 | #endif | |
268 | ||
269 | #ifdef tex4300 | |
270 | #define NLIST_STRUCT | |
271 | #endif | |
272 | ||
273 | #ifdef butterfly | |
274 | #define NLIST_STRUCT | |
275 | #endif | |
276 | ||
277 | #endif /* defined (NLIST_STRUCT) */ | |
278 | ||
1e5ba5b5 RM |
279 | |
280 | #if defined(sgi) || (defined(mips) && !defined(BSD)) | |
281 | #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
282 | #endif | |
283 | ||
284 | ||
285 | #if !defined (KERNEL_FILE) && defined (sequent) | |
286 | #define KERNEL_FILE "/dynix" | |
287 | #endif | |
288 | ||
289 | #if !defined (KERNEL_FILE) && defined (hpux) | |
290 | #define KERNEL_FILE "/hp-ux" | |
291 | #endif | |
292 | ||
293 | #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan))) | |
294 | #define KERNEL_FILE "/unix" | |
295 | #endif | |
296 | ||
297 | ||
298 | #if !defined (LDAV_SYMBOL) && defined (alliant) | |
299 | #define LDAV_SYMBOL "_Loadavg" | |
300 | #endif | |
301 | ||
302 | #if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan))) | |
303 | #define LDAV_SYMBOL "avenrun" | |
304 | #endif | |
305 | ||
306 | #ifdef HAVE_UNISTD_H | |
307 | #include <unistd.h> | |
308 | #endif | |
309 | ||
310 | #include <stdio.h> | |
311 | #include <errno.h> | |
312 | ||
313 | #ifndef errno | |
314 | extern int errno; | |
315 | #endif | |
316 | ||
317 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
318 | nlist method. */ | |
319 | #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) | |
320 | #define LOAD_AVE_TYPE double | |
321 | #endif | |
322 | ||
323 | #ifdef LOAD_AVE_TYPE | |
324 | ||
325 | #ifndef VMS | |
326 | #ifndef NLIST_STRUCT | |
327 | #include <a.out.h> | |
328 | #else /* NLIST_STRUCT */ | |
329 | #include <nlist.h> | |
330 | #endif /* NLIST_STRUCT */ | |
331 | ||
332 | #ifdef SUNOS_5 | |
333 | #include <fcntl.h> | |
334 | #include <kvm.h> | |
335 | #endif | |
336 | ||
337 | #ifndef KERNEL_FILE | |
338 | #define KERNEL_FILE "/vmunix" | |
339 | #endif /* KERNEL_FILE */ | |
340 | ||
341 | #ifndef LDAV_SYMBOL | |
342 | #define LDAV_SYMBOL "_avenrun" | |
343 | #endif /* LDAV_SYMBOL */ | |
344 | ||
345 | #else /* VMS */ | |
346 | ||
347 | #ifndef eunice | |
348 | #include <iodef.h> | |
349 | #include <descrip.h> | |
350 | #else /* eunice */ | |
351 | #include <vms/iodef.h> | |
352 | #endif /* eunice */ | |
353 | #endif /* VMS */ | |
354 | ||
355 | #ifndef LDAV_CVT | |
356 | #define LDAV_CVT(n) ((double) (n)) | |
357 | #endif /* !LDAV_CVT */ | |
358 | ||
359 | #endif /* LOAD_AVE_TYPE */ | |
360 | ||
361 | #ifdef NeXT | |
362 | #ifdef HAVE_MACH_MACH_H | |
363 | #include <mach/mach.h> | |
364 | #else | |
365 | #include <mach.h> | |
366 | #endif | |
367 | #endif /* NeXT */ | |
368 | ||
369 | #ifdef sgi | |
370 | #include <sys/sysmp.h> | |
371 | #endif /* sgi */ | |
372 | ||
373 | #ifdef UMAX | |
374 | #include <stdio.h> | |
375 | #include <signal.h> | |
376 | #include <sys/time.h> | |
377 | #include <sys/wait.h> | |
378 | #include <sys/syscall.h> | |
379 | ||
380 | #ifdef UMAX_43 | |
381 | #include <machine/cpu.h> | |
382 | #include <inq_stats/statistics.h> | |
383 | #include <inq_stats/sysstats.h> | |
384 | #include <inq_stats/cpustats.h> | |
385 | #include <inq_stats/procstats.h> | |
386 | #else /* Not UMAX_43. */ | |
387 | #include <sys/sysdefs.h> | |
388 | #include <sys/statistics.h> | |
389 | #include <sys/sysstats.h> | |
390 | #include <sys/cpudefs.h> | |
391 | #include <sys/cpustats.h> | |
392 | #include <sys/procstats.h> | |
393 | #endif /* Not UMAX_43. */ | |
394 | #endif /* UMAX */ | |
395 | ||
396 | #ifdef DGUX | |
397 | #include <sys/dg_sys_info.h> | |
398 | #endif | |
399 | ||
400 | #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
401 | #include <fcntl.h> | |
402 | #else | |
403 | #include <sys/file.h> | |
404 | #endif | |
405 | \f | |
406 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
407 | ||
408 | #ifdef NeXT | |
409 | static processor_set_t default_set; | |
410 | static int getloadavg_initialized; | |
411 | #endif /* NeXT */ | |
412 | ||
413 | #ifdef UMAX | |
414 | static unsigned int cpus = 0; | |
415 | static unsigned int samples; | |
416 | #endif /* UMAX */ | |
417 | ||
418 | #ifdef DGUX | |
419 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ | |
420 | #endif /* DGUX */ | |
421 | ||
422 | #ifdef LOAD_AVE_TYPE | |
423 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ | |
424 | static int channel; | |
425 | /* Nonzero iff channel is valid. */ | |
426 | static int getloadavg_initialized; | |
427 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
428 | static long offset; | |
429 | ||
430 | #if !defined(VMS) && !defined(sgi) | |
431 | static struct nlist nl[2]; | |
432 | #endif /* Not VMS or sgi */ | |
433 | ||
434 | #ifdef SUNOS_5 | |
435 | static kvm_t *kd; | |
436 | #endif /* SUNOS_5 */ | |
437 | ||
438 | #endif /* LOAD_AVE_TYPE */ | |
439 | \f | |
440 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
441 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 442 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
443 | or -1 if an error occurred. */ |
444 | ||
445 | int | |
446 | getloadavg (loadavg, nelem) | |
447 | double loadavg[]; | |
448 | int nelem; | |
449 | { | |
450 | int elem = 0; /* Return value. */ | |
451 | ||
7ee260fe RM |
452 | #ifdef NO_GET_LOAD_AVG |
453 | #define LDAV_DONE | |
454 | /* Set errno to zero to indicate that there was no particular error; | |
455 | this function just can't work at all on this system. */ | |
456 | errno = 0; | |
457 | elem = -1; | |
458 | #endif | |
459 | ||
22ddf250 | 460 | #if !defined (LDAV_DONE) && defined (__linux__) |
1e5ba5b5 RM |
461 | #define LDAV_DONE |
462 | #undef LOAD_AVE_TYPE | |
463 | ||
464 | #ifndef LINUX_LDAV_FILE | |
465 | #define LINUX_LDAV_FILE "/proc/loadavg" | |
466 | #endif | |
467 | ||
468 | char ldavgbuf[40]; | |
469 | double load_ave[3]; | |
470 | int fd, count; | |
471 | ||
472 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
473 | if (fd == -1) | |
474 | return -1; | |
475 | count = read (fd, ldavgbuf, 40); | |
476 | (void) close (fd); | |
477 | if (count <= 0) | |
478 | return -1; | |
479 | ||
480 | count = sscanf (ldavgbuf, "%lf %lf %lf", | |
481 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
482 | if (count < 1) | |
483 | return -1; | |
484 | ||
485 | for (elem = 0; elem < nelem && elem < count; elem++) | |
486 | loadavg[elem] = load_ave[elem]; | |
487 | ||
488 | return elem; | |
489 | ||
22ddf250 | 490 | #endif /* __linux__ */ |
1e5ba5b5 RM |
491 | |
492 | #if !defined (LDAV_DONE) && defined (NeXT) | |
493 | #define LDAV_DONE | |
494 | /* The NeXT code was adapted from iscreen 3.2. */ | |
495 | ||
496 | host_t host; | |
497 | struct processor_set_basic_info info; | |
498 | unsigned info_count; | |
499 | ||
039e9c8b DM |
500 | /* We only know how to get the 1-minute average for this system, |
501 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
502 | |
503 | if (!getloadavg_initialized) | |
504 | { | |
505 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
506 | getloadavg_initialized = 1; | |
507 | } | |
508 | ||
509 | if (getloadavg_initialized) | |
510 | { | |
511 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
512 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
513 | (processor_set_info_t) &info, &info_count) | |
514 | != KERN_SUCCESS) | |
515 | getloadavg_initialized = 0; | |
516 | else | |
517 | { | |
518 | if (nelem > 0) | |
519 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
520 | } | |
521 | } | |
522 | ||
523 | if (!getloadavg_initialized) | |
524 | return -1; | |
525 | #endif /* NeXT */ | |
526 | ||
527 | #if !defined (LDAV_DONE) && defined (UMAX) | |
528 | #define LDAV_DONE | |
529 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not | |
530 | have a /dev/kmem. Information about the workings of the running kernel | |
531 | can be gathered with inq_stats system calls. | |
532 | We only know how to get the 1-minute average for this system. */ | |
533 | ||
534 | struct proc_summary proc_sum_data; | |
535 | struct stat_descr proc_info; | |
536 | double load; | |
537 | register unsigned int i, j; | |
538 | ||
539 | if (cpus == 0) | |
540 | { | |
541 | register unsigned int c, i; | |
542 | struct cpu_config conf; | |
543 | struct stat_descr desc; | |
544 | ||
545 | desc.sd_next = 0; | |
546 | desc.sd_subsys = SUBSYS_CPU; | |
547 | desc.sd_type = CPUTYPE_CONFIG; | |
548 | desc.sd_addr = (char *) &conf; | |
549 | desc.sd_size = sizeof conf; | |
550 | ||
551 | if (inq_stats (1, &desc)) | |
552 | return -1; | |
553 | ||
554 | c = 0; | |
555 | for (i = 0; i < conf.config_maxclass; ++i) | |
556 | { | |
557 | struct class_stats stats; | |
558 | bzero ((char *) &stats, sizeof stats); | |
559 | ||
560 | desc.sd_type = CPUTYPE_CLASS; | |
561 | desc.sd_objid = i; | |
562 | desc.sd_addr = (char *) &stats; | |
563 | desc.sd_size = sizeof stats; | |
564 | ||
565 | if (inq_stats (1, &desc)) | |
566 | return -1; | |
567 | ||
568 | c += stats.class_numcpus; | |
569 | } | |
570 | cpus = c; | |
571 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
572 | } | |
573 | ||
574 | proc_info.sd_next = 0; | |
575 | proc_info.sd_subsys = SUBSYS_PROC; | |
576 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
577 | proc_info.sd_addr = (char *) &proc_sum_data; | |
578 | proc_info.sd_size = sizeof (struct proc_summary); | |
579 | proc_info.sd_sizeused = 0; | |
580 | ||
581 | if (inq_stats (1, &proc_info) != 0) | |
582 | return -1; | |
583 | ||
584 | load = proc_sum_data.ps_nrunnable; | |
585 | j = 0; | |
586 | for (i = samples - 1; i > 0; --i) | |
587 | { | |
588 | load += proc_sum_data.ps_nrun[j]; | |
589 | if (j++ == PS_NRUNSIZE) | |
590 | j = 0; | |
591 | } | |
592 | ||
593 | if (nelem > 0) | |
594 | loadavg[elem++] = load / samples / cpus; | |
595 | #endif /* UMAX */ | |
596 | ||
597 | #if !defined (LDAV_DONE) && defined (DGUX) | |
598 | #define LDAV_DONE | |
599 | /* This call can return -1 for an error, but with good args | |
600 | it's not supposed to fail. The first argument is for no | |
601 | apparent reason of type `long int *'. */ | |
602 | dg_sys_info ((long int *) &load_info, | |
603 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
604 | DG_SYS_INFO_LOAD_VERSION_0); | |
605 | ||
606 | if (nelem > 0) | |
607 | loadavg[elem++] = load_info.one_minute; | |
608 | if (nelem > 1) | |
609 | loadavg[elem++] = load_info.five_minute; | |
610 | if (nelem > 2) | |
611 | loadavg[elem++] = load_info.fifteen_minute; | |
612 | #endif /* DGUX */ | |
613 | ||
614 | #if !defined (LDAV_DONE) && defined (apollo) | |
615 | #define LDAV_DONE | |
616 | /* Apollo code from lisch@mentorg.com (Ray Lischner). | |
617 | ||
618 | This system call is not documented. The load average is obtained as | |
619 | three long integers, for the load average over the past minute, | |
620 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
621 | with 16 bits of integer part and 16 bits of fraction part. | |
622 | ||
623 | I'm not sure which operating system first supported this system call, | |
624 | but I know that SR10.2 supports it. */ | |
625 | ||
626 | extern void proc1_$get_loadav (); | |
627 | unsigned long load_ave[3]; | |
628 | ||
629 | proc1_$get_loadav (load_ave); | |
630 | ||
631 | if (nelem > 0) | |
632 | loadavg[elem++] = load_ave[0] / 65536.0; | |
633 | if (nelem > 1) | |
634 | loadavg[elem++] = load_ave[1] / 65536.0; | |
635 | if (nelem > 2) | |
636 | loadavg[elem++] = load_ave[2] / 65536.0; | |
637 | #endif /* apollo */ | |
638 | ||
639 | #if !defined (LDAV_DONE) && defined (OSF_MIPS) | |
640 | #define LDAV_DONE | |
1e5ba5b5 RM |
641 | |
642 | struct tbl_loadavg load_ave; | |
643 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
644 | loadavg[elem++] |
645 | = (load_ave.tl_lscale == 0 | |
646 | ? load_ave.tl_avenrun.d[0] | |
647 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
1e5ba5b5 RM |
648 | #endif /* OSF_MIPS */ |
649 | ||
650 | #if !defined (LDAV_DONE) && defined (VMS) | |
651 | /* VMS specific code -- read from the Load Ave driver. */ | |
652 | ||
653 | LOAD_AVE_TYPE load_ave[3]; | |
654 | static int getloadavg_initialized = 0; | |
655 | #ifdef eunice | |
656 | struct | |
657 | { | |
658 | int dsc$w_length; | |
659 | char *dsc$a_pointer; | |
660 | } descriptor; | |
661 | #endif | |
662 | ||
663 | /* Ensure that there is a channel open to the load ave device. */ | |
664 | if (!getloadavg_initialized) | |
665 | { | |
666 | /* Attempt to open the channel. */ | |
667 | #ifdef eunice | |
668 | descriptor.dsc$w_length = 18; | |
669 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
670 | #else | |
671 | $DESCRIPTOR (descriptor, "LAV0:"); | |
672 | #endif | |
673 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) | |
674 | getloadavg_initialized = 1; | |
675 | } | |
676 | ||
677 | /* Read the load average vector. */ | |
678 | if (getloadavg_initialized | |
679 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
680 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
681 | { | |
682 | sys$dassgn (channel); | |
683 | getloadavg_initialized = 0; | |
684 | } | |
685 | ||
686 | if (!getloadavg_initialized) | |
687 | return -1; | |
688 | #endif /* VMS */ | |
689 | ||
690 | #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) | |
691 | ||
692 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
693 | ||
694 | #define LDAV_PRIVILEGED /* This code requires special installation. */ | |
695 | ||
696 | LOAD_AVE_TYPE load_ave[3]; | |
697 | ||
698 | /* Get the address of LDAV_SYMBOL. */ | |
699 | if (offset == 0) | |
700 | { | |
1e5ba5b5 RM |
701 | #ifndef sgi |
702 | #ifndef NLIST_STRUCT | |
703 | strcpy (nl[0].n_name, LDAV_SYMBOL); | |
704 | strcpy (nl[1].n_name, ""); | |
705 | #else /* NLIST_STRUCT */ | |
706 | #ifdef NLIST_NAME_UNION | |
707 | nl[0].n_un.n_name = LDAV_SYMBOL; | |
708 | nl[1].n_un.n_name = 0; | |
709 | #else /* not NLIST_NAME_UNION */ | |
710 | nl[0].n_name = LDAV_SYMBOL; | |
711 | nl[1].n_name = 0; | |
712 | #endif /* not NLIST_NAME_UNION */ | |
713 | #endif /* NLIST_STRUCT */ | |
714 | ||
fb3ebe6c | 715 | #ifndef SUNOS_5 |
1e5ba5b5 RM |
716 | if (nlist (KERNEL_FILE, nl) >= 0) |
717 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | |
718 | { | |
719 | #ifdef FIXUP_KERNEL_SYMBOL_ADDR | |
720 | FIXUP_KERNEL_SYMBOL_ADDR (nl); | |
721 | #endif | |
722 | offset = nl[0].n_value; | |
723 | } | |
fb3ebe6c | 724 | #endif /* !SUNOS_5 */ |
1e5ba5b5 RM |
725 | #else /* sgi */ |
726 | int ldav_off; | |
727 | ||
728 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | |
729 | if (ldav_off != -1) | |
730 | offset = (long) ldav_off & 0x7fffffff; | |
731 | #endif /* sgi */ | |
1e5ba5b5 RM |
732 | } |
733 | ||
734 | /* Make sure we have /dev/kmem open. */ | |
735 | if (!getloadavg_initialized) | |
736 | { | |
737 | #ifndef SUNOS_5 | |
738 | channel = open ("/dev/kmem", 0); | |
739 | if (channel >= 0) | |
740 | getloadavg_initialized = 1; | |
741 | #else /* SUNOS_5 */ | |
fb3ebe6c DM |
742 | /* We pass 0 for the kernel, corefile, and swapfile names |
743 | to use the currently running kernel. */ | |
1e5ba5b5 RM |
744 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
745 | if (kd != 0) | |
746 | { | |
fb3ebe6c | 747 | /* nlist the currently running kernel. */ |
1e5ba5b5 | 748 | kvm_nlist (kd, nl); |
fb3ebe6c | 749 | offset = nl[0].n_value; |
1e5ba5b5 RM |
750 | getloadavg_initialized = 1; |
751 | } | |
752 | #endif /* SUNOS_5 */ | |
753 | } | |
754 | ||
755 | /* If we can, get the load average values. */ | |
756 | if (offset && getloadavg_initialized) | |
757 | { | |
758 | /* Try to read the load. */ | |
759 | #ifndef SUNOS_5 | |
760 | if (lseek (channel, offset, 0) == -1L | |
761 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
762 | != sizeof (load_ave)) | |
763 | { | |
764 | close (channel); | |
765 | getloadavg_initialized = 0; | |
766 | } | |
767 | #else /* SUNOS_5 */ | |
768 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) | |
769 | != sizeof (load_ave)) | |
770 | { | |
771 | kvm_close (kd); | |
772 | getloadavg_initialized = 0; | |
773 | } | |
774 | #endif /* SUNOS_5 */ | |
775 | } | |
776 | ||
777 | if (offset == 0 || !getloadavg_initialized) | |
778 | return -1; | |
779 | #endif /* LOAD_AVE_TYPE and not VMS */ | |
780 | ||
781 | #if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ | |
782 | if (nelem > 0) | |
783 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
784 | if (nelem > 1) | |
785 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
786 | if (nelem > 2) | |
787 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
788 | ||
789 | #define LDAV_DONE | |
790 | #endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
791 | ||
792 | #ifdef LDAV_DONE | |
793 | return elem; | |
794 | #else | |
795 | /* Set errno to zero to indicate that there was no particular error; | |
796 | this function just can't work at all on this system. */ | |
797 | errno = 0; | |
798 | return -1; | |
799 | #endif | |
800 | } | |
801 | \f | |
802 | #ifdef TEST | |
803 | void | |
804 | main (argc, argv) | |
805 | int argc; | |
806 | char **argv; | |
807 | { | |
808 | int naptime = 0; | |
809 | ||
810 | if (argc > 1) | |
811 | naptime = atoi (argv[1]); | |
812 | ||
1e5ba5b5 RM |
813 | while (1) |
814 | { | |
815 | double avg[3]; | |
816 | int loads; | |
817 | ||
818 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
819 | loads = getloadavg (avg, 3); | |
820 | if (loads == -1) | |
821 | { | |
822 | perror ("Error getting load average"); | |
823 | exit (1); | |
824 | } | |
825 | if (loads > 0) | |
826 | printf ("1-minute: %f ", avg[0]); | |
827 | if (loads > 1) | |
828 | printf ("5-minute: %f ", avg[1]); | |
829 | if (loads > 2) | |
830 | printf ("15-minute: %f ", avg[2]); | |
831 | if (loads > 0) | |
832 | putchar ('\n'); | |
db6730c7 RM |
833 | |
834 | if (naptime == 0) | |
835 | break; | |
1e5ba5b5 RM |
836 | sleep (naptime); |
837 | } | |
db6730c7 RM |
838 | |
839 | exit (0); | |
1e5ba5b5 RM |
840 | } |
841 | #endif /* TEST */ |