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