|
428
|
1 /* Get the system load averages.
|
|
|
2 Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995
|
|
|
3 Free Software Foundation, Inc.
|
|
|
4
|
|
|
5 This file is part of XEmacs.
|
|
|
6
|
|
|
7 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
8 under the terms of the GNU General Public License as published by the
|
|
|
9 Free Software Foundation; either version 2, or (at your option) any
|
|
|
10 later version.
|
|
|
11
|
|
|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
15 for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to
|
|
|
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
20 Boston, MA 02111-1307, USA. */
|
|
|
21
|
|
|
22 /* Compile-time symbols that this file uses:
|
|
|
23
|
|
|
24 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
|
|
|
25 KERNEL_FILE Pathname of the kernel to nlist.
|
|
|
26 LDAV_CVT() Scale the load average from the kernel.
|
|
|
27 Returns a double.
|
|
|
28 LDAV_SYMBOL Name of kernel symbol giving load average.
|
|
|
29 LOAD_AVE_TYPE Type of the load average array in the kernel.
|
|
|
30 Must be defined unless one of
|
|
|
31 apollo, DGUX, NeXT, or UMAX is defined;
|
|
|
32 otherwise, no load average is available.
|
|
|
33 NLIST_STRUCT Include nlist.h, not a.out.h, and
|
|
|
34 the nlist n_name element is a pointer,
|
|
|
35 not an array.
|
|
|
36 NLIST_NAME_UNION struct nlist has an n_un member, not n_name.
|
|
|
37 LINUX_LDAV_FILE [__linux__]: File containing load averages.
|
|
|
38
|
|
|
39 Specific system predefines this file uses, aside from setting
|
|
|
40 default values if not emacs:
|
|
|
41
|
|
|
42 apollo
|
|
|
43 BSD Real BSD, not just BSD-like.
|
|
|
44 convex
|
|
|
45 DGUX
|
|
|
46 hpux
|
|
|
47 MSDOS No-op for MSDOS.
|
|
|
48 NeXT
|
|
|
49 sgi
|
|
|
50 sequent Sequent Dynix 3.x.x (BSD)
|
|
|
51 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
|
|
|
52 sony_news NEWS-OS (works at least for 4.1C)
|
|
|
53 UMAX
|
|
|
54 UMAX4_3
|
|
|
55 WIN32 No-op for Windows95/NT.
|
|
|
56 __linux__ Linux: assumes /proc filesystem mounted.
|
|
|
57 Support from Michael K. Johnson.
|
|
|
58 __NetBSD__ NetBSD: assumes /kern filesystem mounted.
|
|
|
59 __OpenBSD__ OpenBSD: ditto.
|
|
|
60
|
|
|
61 In addition, to avoid nesting many #ifdefs, we internally set
|
|
|
62 LDAV_DONE to indicate that the load average has been computed.
|
|
|
63
|
|
|
64 We also #define LDAV_PRIVILEGED if a program will require
|
|
|
65 special installation to be able to call getloadavg. */
|
|
|
66
|
|
|
67 /* This should always be first. */
|
|
|
68 #ifdef HAVE_CONFIG_H
|
|
|
69 #include <config.h>
|
|
|
70 #endif
|
|
|
71
|
|
|
72 #ifndef WINDOWSNT
|
|
|
73 #ifndef __CYGWIN32__
|
|
|
74
|
|
|
75 #include <sys/types.h>
|
|
|
76
|
|
|
77 /* Both the Emacs and non-Emacs sections want this. Some
|
|
|
78 configuration files' definitions for the LOAD_AVE_CVT macro (like
|
|
|
79 sparc.h's) use macros like FSCALE, defined here. */
|
|
|
80 #ifdef unix
|
|
|
81 #include <sys/param.h>
|
|
|
82 #endif
|
|
|
83
|
|
|
84 #ifdef XEMACS
|
|
|
85 #include "lisp.h"
|
|
|
86 #include "sysfile.h" /* for encapsulated open, close, read, write */
|
|
|
87 #endif /* XEMACS */
|
|
|
88
|
|
|
89 /* Exclude all the code except the test program at the end
|
|
|
90 if the system has its own `getloadavg' function.
|
|
|
91
|
|
|
92 The declaration of `errno' is needed by the test program
|
|
|
93 as well as the function itself, so it comes first. */
|
|
|
94
|
|
|
95 #include <errno.h>
|
|
|
96
|
|
|
97 #ifndef HAVE_GETLOADAVG
|
|
|
98
|
|
|
99 /* The existing Emacs configuration files define a macro called
|
|
|
100 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
|
|
|
101 returns the load average multiplied by 100. What we actually want
|
|
|
102 is a macro called LDAV_CVT, which returns the load average as an
|
|
|
103 unmultiplied double.
|
|
|
104
|
|
|
105 For backwards compatibility, we'll define LDAV_CVT in terms of
|
|
|
106 LOAD_AVE_CVT, but future machine config files should just define
|
|
|
107 LDAV_CVT directly. */
|
|
|
108
|
|
|
109 #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
|
|
|
110 #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
|
|
|
111 #endif
|
|
|
112
|
|
|
113 #ifdef XEMACS
|
|
|
114 #if defined (HAVE_KSTAT_H)
|
|
|
115 #include <kstat.h>
|
|
|
116 #endif /* HAVE_KSTAT_H */
|
|
|
117 #endif /* XEMACS */
|
|
|
118
|
|
|
119 #if !defined (BSD) && defined (ultrix)
|
|
|
120 /* Ultrix behaves like BSD on Vaxen. */
|
|
|
121 #define BSD
|
|
|
122 #endif
|
|
|
123
|
|
|
124 #ifdef NeXT
|
|
|
125 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
|
|
|
126 conflicts with the definition understood in this file, that this
|
|
|
127 really is BSD. */
|
|
|
128 #undef BSD
|
|
|
129
|
|
|
130 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
|
|
|
131 defined to mean that the nlist method should be used, which is not true. */
|
|
|
132 #undef FSCALE
|
|
|
133 #endif
|
|
|
134
|
|
|
135 /* Set values that are different from the defaults, which are
|
|
|
136 set a little farther down with #ifndef. */
|
|
|
137
|
|
|
138
|
|
|
139 /* Some shorthands. */
|
|
|
140
|
|
|
141 #if defined (HPUX) && !defined (hpux)
|
|
|
142 #define hpux
|
|
|
143 #endif
|
|
|
144
|
|
|
145 #if defined(hp300) && !defined(hpux)
|
|
|
146 #define MORE_BSD
|
|
|
147 #endif
|
|
|
148
|
|
|
149 #if defined(ultrix) && defined(mips)
|
|
|
150 #define decstation
|
|
|
151 #endif
|
|
|
152
|
|
|
153 #if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
|
|
|
154 #define SUNOS_5
|
|
|
155 #endif
|
|
|
156
|
|
|
157 #if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
|
|
|
158 #define OSF_ALPHA
|
|
|
159 #include <netdb.h>
|
|
|
160 #include <netinet/in.h> /* Needed for Digital UNIX V3 */
|
|
|
161 #include <net/proto_net.h>
|
|
|
162 #include <sys/table.h>
|
|
|
163 #endif
|
|
|
164
|
|
|
165 #if defined (__osf__) && (defined (mips) || defined (__mips__))
|
|
|
166 #define OSF_MIPS
|
|
|
167 #include <sys/table.h>
|
|
|
168 #endif
|
|
|
169
|
|
|
170 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
|
|
|
171 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
|
|
|
172 that with a couple of other things and we'll have a unique match. */
|
|
|
173 #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
|
|
|
174 #define tek4300 /* Define by emacs, but not by other users. */
|
|
|
175 #endif
|
|
|
176
|
|
|
177
|
|
|
178 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
|
|
|
179 #ifndef LOAD_AVE_TYPE
|
|
|
180
|
|
|
181 #ifdef MORE_BSD
|
|
|
182 #define LOAD_AVE_TYPE long
|
|
|
183 #endif
|
|
|
184
|
|
|
185 #ifdef sun
|
|
|
186 #define LOAD_AVE_TYPE long
|
|
|
187 #endif
|
|
|
188
|
|
|
189 #ifdef decstation
|
|
|
190 #define LOAD_AVE_TYPE long
|
|
|
191 #endif
|
|
|
192
|
|
|
193 #ifdef _SEQUENT_
|
|
|
194 #define LOAD_AVE_TYPE long
|
|
|
195 #endif
|
|
|
196
|
|
|
197 #ifdef sgi
|
|
|
198 #define LOAD_AVE_TYPE long
|
|
|
199 #endif
|
|
|
200
|
|
|
201 #ifdef SVR4
|
|
|
202 #define LOAD_AVE_TYPE long
|
|
|
203 #endif
|
|
|
204
|
|
|
205 #ifdef sony_news
|
|
|
206 #define LOAD_AVE_TYPE long
|
|
|
207 #endif
|
|
|
208
|
|
|
209 #ifdef sequent
|
|
|
210 #define LOAD_AVE_TYPE long
|
|
|
211 #endif
|
|
|
212
|
|
|
213 #ifdef OSF_ALPHA
|
|
|
214 #define LOAD_AVE_TYPE long
|
|
|
215 #endif
|
|
|
216
|
|
|
217 #if defined (ardent) && defined (titan)
|
|
|
218 #define LOAD_AVE_TYPE long
|
|
|
219 #endif
|
|
|
220
|
|
|
221 #ifdef tek4300
|
|
|
222 #define LOAD_AVE_TYPE long
|
|
|
223 #endif
|
|
|
224
|
|
|
225 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
|
|
|
226 #define LOAD_AVE_TYPE long
|
|
|
227 #endif
|
|
|
228
|
|
|
229 #ifdef _AIX
|
|
|
230 #define LOAD_AVE_TYPE long
|
|
|
231 #endif
|
|
|
232
|
|
|
233 #ifdef convex
|
|
|
234 #define LOAD_AVE_TYPE double
|
|
|
235 #ifndef LDAV_CVT
|
|
|
236 #define LDAV_CVT(n) (n)
|
|
|
237 #endif
|
|
|
238 #endif
|
|
|
239
|
|
|
240 #endif /* No LOAD_AVE_TYPE. */
|
|
|
241
|
|
|
242 #ifdef OSF_ALPHA
|
|
|
243 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
|
|
|
244 according to ghazi@noc.rutgers.edu. */
|
|
|
245 #undef FSCALE
|
|
|
246 #define FSCALE 1024.0
|
|
|
247 #endif
|
|
|
248
|
|
|
249 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
|
|
|
250 /* <sys/param.h> defines an incorrect value for FSCALE on an
|
|
|
251 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
|
|
|
252 #undef FSCALE
|
|
|
253 #define FSCALE 100.0
|
|
|
254 #endif
|
|
|
255
|
|
|
256
|
|
|
257 #ifndef FSCALE
|
|
|
258
|
|
|
259 /* SunOS and some others define FSCALE in sys/param.h. */
|
|
|
260
|
|
|
261 #ifdef MORE_BSD
|
|
|
262 #define FSCALE 2048.0
|
|
|
263 #endif
|
|
|
264
|
|
|
265 #if defined(MIPS) || defined(SVR4) || defined(decstation)
|
|
|
266 #define FSCALE 256
|
|
|
267 #endif
|
|
|
268
|
|
|
269 #if defined (sgi) || defined (sequent)
|
|
|
270 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
|
|
|
271 above under #ifdef MIPS. But we want the sgi value. */
|
|
|
272 #undef FSCALE
|
|
|
273 #define FSCALE 1000.0
|
|
|
274 #endif
|
|
|
275
|
|
|
276 #if defined (ardent) && defined (titan)
|
|
|
277 #define FSCALE 65536.0
|
|
|
278 #endif
|
|
|
279
|
|
|
280 #ifdef tek4300
|
|
|
281 #define FSCALE 100.0
|
|
|
282 #endif
|
|
|
283
|
|
|
284 #ifdef _AIX
|
|
|
285 #define FSCALE 65536.0
|
|
|
286 #endif
|
|
|
287
|
|
|
288 #endif /* Not FSCALE. */
|
|
|
289
|
|
|
290 #if !defined (LDAV_CVT) && defined (FSCALE)
|
|
|
291 #define LDAV_CVT(n) (((double) (n)) / FSCALE)
|
|
|
292 #endif
|
|
|
293
|
|
|
294 /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */
|
|
|
295 #ifndef NLIST_STRUCT
|
|
|
296
|
|
|
297 #ifdef MORE_BSD
|
|
|
298 #define NLIST_STRUCT
|
|
|
299 #endif
|
|
|
300
|
|
|
301 #ifdef sun
|
|
|
302 #define NLIST_STRUCT
|
|
|
303 #endif
|
|
|
304
|
|
|
305 #ifdef decstation
|
|
|
306 #define NLIST_STRUCT
|
|
|
307 #endif
|
|
|
308
|
|
|
309 #ifdef hpux
|
|
|
310 #define NLIST_STRUCT
|
|
|
311 #endif
|
|
|
312
|
|
|
313 #if defined (_SEQUENT_) || defined (sequent)
|
|
|
314 #define NLIST_STRUCT
|
|
|
315 #endif
|
|
|
316
|
|
|
317 #ifdef sgi
|
|
|
318 #define NLIST_STRUCT
|
|
|
319 #endif
|
|
|
320
|
|
|
321 #ifdef SVR4
|
|
|
322 #define NLIST_STRUCT
|
|
|
323 #endif
|
|
|
324
|
|
|
325 #ifdef sony_news
|
|
|
326 #define NLIST_STRUCT
|
|
|
327 #endif
|
|
|
328
|
|
|
329 #ifdef OSF_ALPHA
|
|
|
330 #define NLIST_STRUCT
|
|
|
331 #endif
|
|
|
332
|
|
|
333 #if defined (ardent) && defined (titan)
|
|
|
334 #define NLIST_STRUCT
|
|
|
335 #endif
|
|
|
336
|
|
|
337 #ifdef tek4300
|
|
|
338 #define NLIST_STRUCT
|
|
|
339 #endif
|
|
|
340
|
|
|
341 #ifdef butterfly
|
|
|
342 #define NLIST_STRUCT
|
|
|
343 #endif
|
|
|
344
|
|
|
345 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
|
|
|
346 #define NLIST_STRUCT
|
|
|
347 #endif
|
|
|
348
|
|
|
349 #ifdef _AIX
|
|
|
350 #define NLIST_STRUCT
|
|
|
351 #endif
|
|
|
352
|
|
|
353 #endif /* defined (NLIST_STRUCT) */
|
|
|
354
|
|
|
355
|
|
|
356 #if defined(sgi) || (defined(mips) && !defined(BSD))
|
|
|
357 #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
|
|
|
358 #endif
|
|
|
359
|
|
|
360
|
|
|
361 #if !defined (KERNEL_FILE) && defined (sequent)
|
|
|
362 #define KERNEL_FILE "/dynix"
|
|
|
363 #endif
|
|
|
364
|
|
|
365 #if !defined (KERNEL_FILE) && defined (hpux)
|
|
|
366 #define KERNEL_FILE "/hp-ux"
|
|
|
367 #endif
|
|
|
368
|
|
|
369 #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan)))
|
|
|
370 #define KERNEL_FILE "/unix"
|
|
|
371 #endif
|
|
|
372
|
|
|
373
|
|
|
374 #if !defined (LDAV_SYMBOL) && defined (alliant)
|
|
|
375 #define LDAV_SYMBOL "_Loadavg"
|
|
|
376 #endif
|
|
|
377
|
|
|
378 #if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX))
|
|
|
379 #define LDAV_SYMBOL "avenrun"
|
|
|
380 #endif
|
|
|
381
|
|
|
382 #ifdef HAVE_UNISTD_H
|
|
|
383 #include <unistd.h>
|
|
|
384 #endif
|
|
|
385
|
|
|
386 #include <stdio.h>
|
|
|
387
|
|
|
388 /* LOAD_AVE_TYPE should only get defined if we're going to use the
|
|
|
389 nlist method. */
|
|
|
390 #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
|
|
|
391 #define LOAD_AVE_TYPE double
|
|
|
392 #endif
|
|
|
393
|
|
|
394 #ifdef LOAD_AVE_TYPE
|
|
|
395
|
|
|
396 #ifndef NLIST_STRUCT
|
|
|
397 #include <a.out.h>
|
|
|
398 #else /* NLIST_STRUCT */
|
|
|
399 #include <nlist.h>
|
|
|
400 #endif /* NLIST_STRUCT */
|
|
|
401
|
|
|
402 #ifdef SUNOS_5
|
|
|
403 #include <fcntl.h>
|
|
|
404 #include <kvm.h>
|
|
|
405 #endif
|
|
|
406
|
|
|
407 #ifndef KERNEL_FILE
|
|
|
408 #define KERNEL_FILE "/vmunix"
|
|
|
409 #endif /* KERNEL_FILE */
|
|
|
410
|
|
|
411 #ifndef LDAV_SYMBOL
|
|
|
412 #define LDAV_SYMBOL "_avenrun"
|
|
|
413 #endif /* LDAV_SYMBOL */
|
|
|
414
|
|
|
415 #ifndef LDAV_CVT
|
|
|
416 #define LDAV_CVT(n) ((double) (n))
|
|
|
417 #endif /* !LDAV_CVT */
|
|
|
418
|
|
|
419 #endif /* LOAD_AVE_TYPE */
|
|
|
420
|
|
|
421 #ifdef NeXT
|
|
|
422 #ifdef HAVE_MACH_MACH_H
|
|
|
423 #include <mach/mach.h>
|
|
|
424 #else
|
|
|
425 #include <mach.h>
|
|
|
426 #endif
|
|
|
427 #endif /* NeXT */
|
|
|
428
|
|
|
429 #ifdef sgi
|
|
|
430 #include <sys/sysmp.h>
|
|
|
431 #endif /* sgi */
|
|
|
432
|
|
|
433 #ifdef UMAX
|
|
|
434 #include <stdio.h>
|
|
|
435 #include <signal.h>
|
|
|
436 #include <sys/time.h>
|
|
|
437 #include <sys/wait.h>
|
|
|
438 #include <sys/syscall.h>
|
|
|
439
|
|
|
440 #ifdef UMAX_43
|
|
|
441 #include <machine/cpu.h>
|
|
|
442 #include <inq_stats/statistics.h>
|
|
|
443 #include <inq_stats/sysstats.h>
|
|
|
444 #include <inq_stats/cpustats.h>
|
|
|
445 #include <inq_stats/procstats.h>
|
|
|
446 #else /* Not UMAX_43. */
|
|
|
447 #include <sys/sysdefs.h>
|
|
|
448 #include <sys/statistics.h>
|
|
|
449 #include <sys/sysstats.h>
|
|
|
450 #include <sys/cpudefs.h>
|
|
|
451 #include <sys/cpustats.h>
|
|
|
452 #include <sys/procstats.h>
|
|
|
453 #endif /* Not UMAX_43. */
|
|
|
454 #endif /* UMAX */
|
|
|
455
|
|
|
456 #ifdef DGUX
|
|
|
457 #include <sys/dg_sys_info.h>
|
|
|
458 #endif
|
|
|
459
|
|
|
460 #ifdef XEMACS
|
|
|
461 #if defined (HAVE_SYS_PSTAT_H)
|
|
|
462 #include <sys/pstat.h>
|
|
|
463 #endif /* HAVE_SYS_PSTAT_H (on HPUX) */
|
|
|
464 #endif /* XEMACS */
|
|
|
465
|
|
|
466 #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
|
|
|
467 #include <fcntl.h>
|
|
|
468 #else
|
|
|
469 #include <sys/file.h>
|
|
|
470 #endif
|
|
|
471
|
|
|
472 /* Avoid static vars inside a function since in HPUX they dump as pure. */
|
|
|
473
|
|
|
474 #ifdef NeXT
|
|
|
475 static processor_set_t default_set;
|
|
|
476 static int getloadavg_initialized;
|
|
|
477 #endif /* NeXT */
|
|
|
478
|
|
|
479 #ifdef UMAX
|
|
|
480 static unsigned int cpus = 0;
|
|
|
481 static unsigned int samples;
|
|
|
482 #endif /* UMAX */
|
|
|
483
|
|
|
484 #ifdef DGUX
|
|
|
485 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
|
|
|
486 #endif /* DGUX */
|
|
|
487
|
|
|
488 #ifdef LOAD_AVE_TYPE
|
|
|
489 /* File descriptor open to /dev/kmem */
|
|
|
490 static int channel;
|
|
|
491 /* Nonzero iff channel is valid. */
|
|
|
492 static int getloadavg_initialized;
|
|
|
493 /* Offset in kmem to seek to read load average, or 0 means invalid. */
|
|
|
494 static long offset;
|
|
|
495
|
|
|
496 #ifndef sgi
|
|
|
497 static struct nlist nl[2];
|
|
|
498 #endif /* not sgi */
|
|
|
499
|
|
|
500 #ifdef SUNOS_5
|
|
|
501 static kvm_t *kd;
|
|
|
502 #endif /* SUNOS_5 */
|
|
|
503
|
|
|
504 #ifndef countof
|
|
|
505 # define countof(x) (sizeof (x) / sizeof (*(x)))
|
|
|
506 #endif
|
|
|
507
|
|
|
508 #endif /* LOAD_AVE_TYPE */
|
|
|
509
|
|
|
510 /* Put the 1 minute, 5 minute and 15 minute load averages
|
|
|
511 into the first NELEM elements of LOADAVG.
|
|
|
512 Return the number written (never more than 3, but may be less than NELEM),
|
|
|
513 or -1 if an error occurred. */
|
|
|
514
|
|
|
515 int
|
|
|
516 getloadavg (double loadavg[], int nelem)
|
|
|
517 {
|
|
|
518 int elem = 0; /* Return value. */
|
|
|
519
|
|
|
520 #ifdef NO_GET_LOAD_AVG
|
|
|
521 #define LDAV_DONE
|
|
|
522 /* Set errno to zero to indicate that there was no particular error;
|
|
|
523 this function just can't work at all on this system. */
|
|
|
524 errno = 0;
|
|
|
525 elem = -2;
|
|
|
526 #endif /* NO_GET_LOAD_AVG */
|
|
|
527
|
|
|
528 #if ! defined (LDAV_DONE) && defined (HAVE_KSTAT_H) && defined (HAVE_LIBKSTAT)
|
|
|
529 #define LDAV_DONE
|
|
|
530 /* getloadavg is best implemented using kstat (kernel stats), on
|
|
|
531 systems (like SunOS5) that support it, since you don't need special
|
|
|
532 privileges to use it.
|
|
|
533
|
|
|
534 Initial implementation courtesy Zlatko Calusic <zcalusic@carnet.hr>.
|
|
|
535 Integrated to XEmacs by Hrvoje Niksic <hniksic@xemacs.org>.
|
|
|
536 Additional cleanup by Hrvoje Niksic, based on code published by
|
|
|
537 Casper Dik <Casper.Dik@Holland.Sun.Com>. */
|
|
|
538 kstat_ctl_t *kc;
|
|
|
539 kstat_t *ksp;
|
|
|
540 static char *avestrings[] = { "avenrun_1min",
|
|
|
541 "avenrun_5min",
|
|
|
542 "avenrun_15min" };
|
|
|
543
|
|
|
544 if (nelem > countof (avestrings))
|
|
|
545 nelem = countof (avestrings);
|
|
|
546
|
|
|
547 kc = kstat_open ();
|
|
|
548 if (!kc)
|
|
|
549 return -1;
|
|
|
550 ksp = kstat_lookup (kc, "unix", 0, "system_misc");
|
|
|
551 if (!ksp)
|
|
|
552 {
|
|
|
553 kstat_close (kc);
|
|
|
554 return -1;
|
|
|
555 }
|
|
|
556 if (kstat_read (kc, ksp, 0) < 0)
|
|
|
557 {
|
|
|
558 kstat_close (kc);
|
|
|
559 return -1;
|
|
|
560 }
|
|
|
561 for (elem = 0; elem < nelem; elem++)
|
|
|
562 {
|
|
|
563 kstat_named_t *kn =
|
|
|
564 (kstat_named_t *) kstat_data_lookup (ksp, avestrings[elem]);
|
|
|
565 if (!kn)
|
|
|
566 {
|
|
|
567 kstat_close (kc);
|
|
|
568 return -1;
|
|
|
569 }
|
|
|
570 loadavg[elem] = (double)kn->value.ul / FSCALE;
|
|
|
571 }
|
|
|
572 kstat_close (kc);
|
|
|
573 #endif /* HAVE_KSTAT_H && HAVE_LIBKSTAT */
|
|
|
574
|
|
|
575 #if !defined (LDAV_DONE) && defined (HAVE_SYS_PSTAT_H)
|
|
|
576 #define LDAV_DONE
|
|
|
577 /* This is totally undocumented, and is not guaranteed to work, but
|
|
|
578 mayhap it might .... If it does work, it will work only on HP-UX
|
|
|
579 8.0 or later. -- Darryl Okahata <darrylo@sr.hp.com> */
|
|
|
580 #undef LOAD_AVE_TYPE /* Make sure these don't exist. */
|
|
|
581 #undef LOAD_AVE_CVT
|
|
|
582 #undef LDAV_SYMBOL
|
|
|
583 struct pst_dynamic procinfo;
|
|
|
584 union pstun statbuf;
|
|
|
585
|
|
|
586 statbuf.pst_dynamic = &procinfo;
|
|
|
587 if (pstat (PSTAT_DYNAMIC, statbuf, sizeof (struct pst_dynamic), 0, 0) == -1)
|
|
|
588 return (-1);
|
|
|
589 loadavg[elem++] = procinfo.psd_avg_1_min;
|
|
|
590 loadavg[elem++] = procinfo.psd_avg_5_min;
|
|
|
591 loadavg[elem++] = procinfo.psd_avg_15_min;
|
|
|
592 #endif /* HPUX */
|
|
|
593
|
|
|
594 #if !defined (LDAV_DONE) && defined (__linux__)
|
|
|
595 #define LDAV_DONE
|
|
|
596 #undef LOAD_AVE_TYPE
|
|
|
597
|
|
|
598 #ifndef LINUX_LDAV_FILE
|
|
|
599 #define LINUX_LDAV_FILE "/proc/loadavg"
|
|
|
600 #endif
|
|
|
601
|
|
|
602 char ldavgbuf[40];
|
|
|
603 double load_ave[3];
|
|
|
604 int fd, count;
|
|
|
605
|
|
|
606 fd = open (LINUX_LDAV_FILE, O_RDONLY);
|
|
|
607 if (fd == -1)
|
|
|
608 return -1;
|
|
|
609 count = read (fd, ldavgbuf, 40);
|
|
|
610 (void) close (fd);
|
|
|
611 if (count <= 0)
|
|
|
612 return -1;
|
|
|
613
|
|
|
614 count = sscanf (ldavgbuf, "%lf %lf %lf",
|
|
|
615 &load_ave[0], &load_ave[1], &load_ave[2]);
|
|
|
616 if (count < 1)
|
|
|
617 return -1;
|
|
|
618
|
|
|
619 for (elem = 0; elem < nelem && elem < count; elem++)
|
|
|
620 loadavg[elem] = load_ave[elem];
|
|
|
621 #endif /* __linux__ */
|
|
|
622
|
|
|
623 #if !defined (LDAV_DONE) && defined (__NetBSD__) || defined (__OpenBSD__)
|
|
|
624 #define LDAV_DONE
|
|
|
625 #undef LOAD_AVE_TYPE
|
|
|
626
|
|
|
627 #ifndef NETBSD_LDAV_FILE
|
|
|
628 #define NETBSD_LDAV_FILE "/kern/loadavg"
|
|
|
629 #endif
|
|
|
630
|
|
|
631 unsigned long int load_ave[3], scale;
|
|
|
632 int count;
|
|
|
633 FILE *fp;
|
|
|
634
|
|
|
635 fp = fopen (NETBSD_LDAV_FILE, "r");
|
|
|
636 if (fp == NULL)
|
|
|
637 return -1;
|
|
|
638 count = fscanf (fp, "%lu %lu %lu %lu\n",
|
|
|
639 &load_ave[0], &load_ave[1], &load_ave[2],
|
|
|
640 &scale);
|
|
|
641 (void) fclose (fp);
|
|
|
642 if (count != 4)
|
|
|
643 return -1;
|
|
|
644
|
|
|
645 for (elem = 0; elem < nelem; elem++)
|
|
|
646 loadavg[elem] = (double) load_ave[elem] / (double) scale;
|
|
|
647 #endif /* __NetBSD__ or __OpenBSD__ */
|
|
|
648
|
|
|
649 #if !defined (LDAV_DONE) && defined (NeXT)
|
|
|
650 #define LDAV_DONE
|
|
|
651 /* The NeXT code was adapted from iscreen 3.2. */
|
|
|
652
|
|
|
653 host_t host;
|
|
|
654 struct processor_set_basic_info info;
|
|
|
655 unsigned info_count;
|
|
|
656
|
|
|
657 /* We only know how to get the 1-minute average for this system,
|
|
|
658 so even if the caller asks for more than 1, we only return 1. */
|
|
|
659
|
|
|
660 if (!getloadavg_initialized)
|
|
|
661 {
|
|
|
662 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
|
|
|
663 getloadavg_initialized = 1;
|
|
|
664 }
|
|
|
665
|
|
|
666 if (getloadavg_initialized)
|
|
|
667 {
|
|
|
668 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
|
|
|
669 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
|
|
|
670 (processor_set_info_t) &info, &info_count)
|
|
|
671 != KERN_SUCCESS)
|
|
|
672 getloadavg_initialized = 0;
|
|
|
673 else
|
|
|
674 {
|
|
|
675 if (nelem > 0)
|
|
|
676 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
|
|
|
677 }
|
|
|
678 }
|
|
|
679
|
|
|
680 if (!getloadavg_initialized)
|
|
|
681 return -1;
|
|
|
682 #endif /* NeXT */
|
|
|
683
|
|
|
684 #if !defined (LDAV_DONE) && defined (UMAX)
|
|
|
685 #define LDAV_DONE
|
|
|
686 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
|
|
|
687 have a /dev/kmem. Information about the workings of the running kernel
|
|
|
688 can be gathered with inq_stats system calls.
|
|
|
689 We only know how to get the 1-minute average for this system. */
|
|
|
690
|
|
|
691 struct proc_summary proc_sum_data;
|
|
|
692 struct stat_descr proc_info;
|
|
|
693 double load;
|
|
|
694 REGISTER unsigned int i, j;
|
|
|
695
|
|
|
696 if (cpus == 0)
|
|
|
697 {
|
|
|
698 REGISTER unsigned int c, i;
|
|
|
699 struct cpu_config conf;
|
|
|
700 struct stat_descr desc;
|
|
|
701
|
|
|
702 desc.sd_next = 0;
|
|
|
703 desc.sd_subsys = SUBSYS_CPU;
|
|
|
704 desc.sd_type = CPUTYPE_CONFIG;
|
|
|
705 desc.sd_addr = (char *) &conf;
|
|
|
706 desc.sd_size = sizeof conf;
|
|
|
707
|
|
|
708 if (inq_stats (1, &desc))
|
|
|
709 return -1;
|
|
|
710
|
|
|
711 c = 0;
|
|
|
712 for (i = 0; i < conf.config_maxclass; ++i)
|
|
|
713 {
|
|
|
714 struct class_stats stats;
|
|
|
715 memset ((char *) &stats, 0, sizeof stats);
|
|
|
716
|
|
|
717 desc.sd_type = CPUTYPE_CLASS;
|
|
|
718 desc.sd_objid = i;
|
|
|
719 desc.sd_addr = (char *) &stats;
|
|
|
720 desc.sd_size = sizeof stats;
|
|
|
721
|
|
|
722 if (inq_stats (1, &desc))
|
|
|
723 return -1;
|
|
|
724
|
|
|
725 c += stats.class_numcpus;
|
|
|
726 }
|
|
|
727 cpus = c;
|
|
|
728 samples = cpus < 2 ? 3 : (2 * cpus / 3);
|
|
|
729 }
|
|
|
730
|
|
|
731 proc_info.sd_next = 0;
|
|
|
732 proc_info.sd_subsys = SUBSYS_PROC;
|
|
|
733 proc_info.sd_type = PROCTYPE_SUMMARY;
|
|
|
734 proc_info.sd_addr = (char *) &proc_sum_data;
|
|
|
735 proc_info.sd_size = sizeof (struct proc_summary);
|
|
|
736 proc_info.sd_sizeused = 0;
|
|
|
737
|
|
|
738 if (inq_stats (1, &proc_info) != 0)
|
|
|
739 return -1;
|
|
|
740
|
|
|
741 load = proc_sum_data.ps_nrunnable;
|
|
|
742 j = 0;
|
|
|
743 for (i = samples - 1; i > 0; --i)
|
|
|
744 {
|
|
|
745 load += proc_sum_data.ps_nrun[j];
|
|
|
746 if (j++ == PS_NRUNSIZE)
|
|
|
747 j = 0;
|
|
|
748 }
|
|
|
749
|
|
|
750 if (nelem > 0)
|
|
|
751 loadavg[elem++] = load / samples / cpus;
|
|
|
752 #endif /* UMAX */
|
|
|
753
|
|
|
754 #if !defined (LDAV_DONE) && defined (DGUX)
|
|
|
755 #define LDAV_DONE
|
|
|
756 /* This call can return -1 for an error, but with good args
|
|
|
757 it's not supposed to fail. The first argument is for no
|
|
|
758 apparent reason of type `long int *'. */
|
|
|
759 dg_sys_info ((long int *) &load_info,
|
|
|
760 DG_SYS_INFO_LOAD_INFO_TYPE,
|
|
|
761 DG_SYS_INFO_LOAD_VERSION_0);
|
|
|
762
|
|
|
763 if (nelem > 0)
|
|
|
764 loadavg[elem++] = load_info.one_minute;
|
|
|
765 if (nelem > 1)
|
|
|
766 loadavg[elem++] = load_info.five_minute;
|
|
|
767 if (nelem > 2)
|
|
|
768 loadavg[elem++] = load_info.fifteen_minute;
|
|
|
769 #endif /* DGUX */
|
|
|
770
|
|
|
771 #if !defined (LDAV_DONE) && defined (apollo)
|
|
|
772 #define LDAV_DONE
|
|
|
773 /* Apollo code from lisch@mentorg.com (Ray Lischner).
|
|
|
774
|
|
|
775 This system call is not documented. The load average is obtained as
|
|
|
776 three long integers, for the load average over the past minute,
|
|
|
777 five minutes, and fifteen minutes. Each value is a scaled integer,
|
|
|
778 with 16 bits of integer part and 16 bits of fraction part.
|
|
|
779
|
|
|
780 I'm not sure which operating system first supported this system call,
|
|
|
781 but I know that SR10.2 supports it. */
|
|
|
782
|
|
|
783 extern void proc1_$get_loadav ();
|
|
|
784 unsigned long load_ave[3];
|
|
|
785
|
|
|
786 proc1_$get_loadav (load_ave);
|
|
|
787
|
|
|
788 if (nelem > 0)
|
|
|
789 loadavg[elem++] = load_ave[0] / 65536.0;
|
|
|
790 if (nelem > 1)
|
|
|
791 loadavg[elem++] = load_ave[1] / 65536.0;
|
|
|
792 if (nelem > 2)
|
|
|
793 loadavg[elem++] = load_ave[2] / 65536.0;
|
|
|
794 #endif /* apollo */
|
|
|
795
|
|
|
796 #if !defined (LDAV_DONE) && defined (OSF_MIPS)
|
|
|
797 #define LDAV_DONE
|
|
|
798
|
|
|
799 struct tbl_loadavg load_ave;
|
|
|
800 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
|
801 loadavg[elem++]
|
|
|
802 = (load_ave.tl_lscale == 0
|
|
|
803 ? load_ave.tl_avenrun.d[0]
|
|
|
804 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
|
|
|
805 #endif /* OSF_MIPS */
|
|
|
806
|
|
|
807 #if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32))
|
|
|
808 #define LDAV_DONE
|
|
|
809
|
|
|
810 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
811 for ( ; elem < nelem; elem++)
|
|
|
812 {
|
|
|
813 loadavg[elem] = 0.0;
|
|
|
814 }
|
|
|
815 #endif /* MSDOS */
|
|
|
816
|
|
|
817 #if !defined (LDAV_DONE) && defined (OSF_ALPHA)
|
|
|
818 #define LDAV_DONE
|
|
|
819
|
|
|
820 struct tbl_loadavg load_ave;
|
|
|
821 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
|
822 for (elem = 0; elem < nelem; elem++)
|
|
|
823 loadavg[elem]
|
|
|
824 = (load_ave.tl_lscale == 0
|
|
|
825 ? load_ave.tl_avenrun.d[elem]
|
|
|
826 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
|
|
|
827 #endif /* OSF_ALPHA */
|
|
|
828
|
|
|
829 #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE)
|
|
|
830
|
|
|
831 /* UNIX-specific code -- read the average from /dev/kmem. */
|
|
|
832
|
|
|
833 #define LDAV_PRIVILEGED /* This code requires special installation. */
|
|
|
834
|
|
|
835 LOAD_AVE_TYPE load_ave[3];
|
|
|
836
|
|
|
837 /* Get the address of LDAV_SYMBOL. */
|
|
|
838 if (offset == 0)
|
|
|
839 {
|
|
|
840 #ifndef sgi
|
|
|
841 #ifndef NLIST_STRUCT
|
|
|
842 strcpy (nl[0].n_name, LDAV_SYMBOL);
|
|
|
843 strcpy (nl[1].n_name, "");
|
|
|
844 #else /* NLIST_STRUCT */
|
|
|
845 #ifdef NLIST_NAME_UNION
|
|
|
846 nl[0].n_un.n_name = LDAV_SYMBOL;
|
|
|
847 nl[1].n_un.n_name = 0;
|
|
|
848 #else /* not NLIST_NAME_UNION */
|
|
|
849 nl[0].n_name = (char *) LDAV_SYMBOL;
|
|
|
850 nl[1].n_name = 0;
|
|
|
851 #endif /* not NLIST_NAME_UNION */
|
|
|
852 #endif /* NLIST_STRUCT */
|
|
|
853
|
|
|
854 #ifndef SUNOS_5
|
|
|
855 if (
|
|
|
856 #if !(defined (_AIX) && !defined (ps2))
|
|
|
857 nlist (KERNEL_FILE, nl)
|
|
|
858 #else /* _AIX */
|
|
|
859 knlist (nl, 1, sizeof (nl[0]))
|
|
|
860 #endif
|
|
|
861 >= 0)
|
|
|
862 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
|
|
|
863 {
|
|
|
864 #ifdef FIXUP_KERNEL_SYMBOL_ADDR
|
|
|
865 FIXUP_KERNEL_SYMBOL_ADDR (nl);
|
|
|
866 #endif
|
|
|
867 offset = nl[0].n_value;
|
|
|
868 }
|
|
|
869 #endif /* !SUNOS_5 */
|
|
|
870 #else /* sgi */
|
|
|
871 int ldav_off;
|
|
|
872
|
|
|
873 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
|
|
|
874 if (ldav_off != -1)
|
|
|
875 offset = (long) ldav_off & 0x7fffffff;
|
|
|
876 #endif /* sgi */
|
|
|
877 }
|
|
|
878
|
|
|
879 /* Make sure we have /dev/kmem open. */
|
|
|
880 if (!getloadavg_initialized)
|
|
|
881 {
|
|
|
882 #ifndef SUNOS_5
|
|
|
883 channel = open ("/dev/kmem", 0);
|
|
|
884 if (channel >= 0)
|
|
|
885 {
|
|
|
886 /* Set the channel to close on exec, so it does not
|
|
|
887 litter any child's descriptor table. */
|
|
|
888 #ifdef FD_SETFD
|
|
|
889 #ifndef FD_CLOEXEC
|
|
|
890 #define FD_CLOEXEC 1
|
|
|
891 #endif
|
|
|
892 (void) fcntl (channel, F_SETFD, FD_CLOEXEC);
|
|
|
893 #endif
|
|
|
894 getloadavg_initialized = 1;
|
|
|
895 }
|
|
|
896 #else /* SUNOS_5 */
|
|
|
897 /* We pass 0 for the kernel, corefile, and swapfile names
|
|
|
898 to use the currently running kernel. */
|
|
|
899 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
|
|
|
900 if (kd != 0)
|
|
|
901 {
|
|
|
902 /* nlist the currently running kernel. */
|
|
|
903 kvm_nlist (kd, nl);
|
|
|
904 offset = nl[0].n_value;
|
|
|
905 getloadavg_initialized = 1;
|
|
|
906 }
|
|
|
907 #endif /* SUNOS_5 */
|
|
|
908 }
|
|
|
909
|
|
|
910 /* If we can, get the load average values. */
|
|
|
911 if (offset && getloadavg_initialized)
|
|
|
912 {
|
|
|
913 /* Try to read the load. */
|
|
|
914 #ifndef SUNOS_5
|
|
|
915 if (lseek (channel, offset, 0) == -1L
|
|
|
916 || read (channel, (char *) load_ave, sizeof (load_ave))
|
|
|
917 != sizeof (load_ave))
|
|
|
918 {
|
|
|
919 close (channel);
|
|
|
920 getloadavg_initialized = 0;
|
|
|
921 }
|
|
|
922 #else /* SUNOS_5 */
|
|
|
923 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
|
|
|
924 != sizeof (load_ave))
|
|
|
925 {
|
|
|
926 kvm_close (kd);
|
|
|
927 getloadavg_initialized = 0;
|
|
|
928 }
|
|
|
929 #endif /* SUNOS_5 */
|
|
|
930 }
|
|
|
931
|
|
|
932 if (offset == 0 || !getloadavg_initialized)
|
|
|
933 return -1;
|
|
|
934
|
|
|
935 if (nelem > 0)
|
|
|
936 loadavg[elem++] = LDAV_CVT (load_ave[0]);
|
|
|
937 if (nelem > 1)
|
|
|
938 loadavg[elem++] = LDAV_CVT (load_ave[1]);
|
|
|
939 if (nelem > 2)
|
|
|
940 loadavg[elem++] = LDAV_CVT (load_ave[2]);
|
|
|
941
|
|
|
942 #define LDAV_DONE
|
|
|
943 #endif /* !LDAV_DONE && LOAD_AVE_TYPE */
|
|
|
944
|
|
|
945 return elem;
|
|
|
946 }
|
|
|
947
|
|
|
948 #endif /* ! HAVE_GETLOADAVG */
|
|
|
949
|
|
|
950 #ifdef TEST
|
|
|
951 void
|
|
|
952 main (int argc, char **argv)
|
|
|
953 {
|
|
|
954 int naptime = 0;
|
|
|
955
|
|
|
956 if (argc > 1)
|
|
|
957 naptime = atoi (argv[1]);
|
|
|
958
|
|
|
959 while (1)
|
|
|
960 {
|
|
|
961 double avg[3];
|
|
|
962 int loads;
|
|
|
963
|
|
|
964 errno = 0; /* Don't be misled if it doesn't set errno. */
|
|
|
965 loads = getloadavg (avg, 3);
|
|
|
966 if (loads == -1)
|
|
|
967 {
|
|
|
968 perror ("Error getting load average");
|
|
|
969 exit (1);
|
|
|
970 }
|
|
|
971 if (loads > 0)
|
|
|
972 printf ("1-minute: %f ", avg[0]);
|
|
|
973 if (loads > 1)
|
|
|
974 printf ("5-minute: %f ", avg[1]);
|
|
|
975 if (loads > 2)
|
|
|
976 printf ("15-minute: %f ", avg[2]);
|
|
|
977 if (loads > 0)
|
|
|
978 putchar ('\n');
|
|
|
979
|
|
|
980 if (naptime == 0)
|
|
|
981 break;
|
|
|
982 sleep (naptime);
|
|
|
983 }
|
|
|
984
|
|
|
985 exit (0);
|
|
|
986 }
|
|
|
987 #endif /* TEST */
|
|
|
988
|
|
|
989 #else
|
|
|
990
|
|
|
991 /* Emulate getloadavg. */
|
|
|
992 int
|
|
|
993 getloadavg (double loadavg[], int nelem)
|
|
|
994 {
|
|
|
995 int i;
|
|
|
996
|
|
|
997 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
998 for (i = 0; i < nelem; i++)
|
|
|
999 {
|
|
|
1000 loadavg[i] = 0.0;
|
|
|
1001 }
|
|
|
1002 return i;
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 #endif /*__GNUWIN32__*/
|
|
|
1006 #endif /* WINDOWSNT */
|
