1 /* Get the system load averages.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995,
3 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
6 NOTE: The canonical source of this file is maintained with gnulib.
7 Bugs can be reported to bug-gnulib@gnu.org.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
24 /* Compile-time symbols that this file uses:
26 HAVE_PSTAT_GETDYNAMIC Define this if your system has the
27 pstat_getdynamic function. I think it
28 is unique to HPUX9. The best way to get the
29 definition is through the AC_FUNC_GETLOADAVG
30 macro that comes with autoconf 2.13 or newer.
31 If that isn't an option, then just put
32 AC_CHECK_FUNCS(pstat_getdynamic) in your
34 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
35 KERNEL_FILE Pathname of the kernel to nlist.
36 LDAV_CVT() Scale the load average from the kernel.
38 LDAV_SYMBOL Name of kernel symbol giving load average.
39 LOAD_AVE_TYPE Type of the load average array in the kernel.
40 Must be defined unless one of
41 apollo, DGUX, NeXT, or UMAX is defined;
43 otherwise, no load average is available.
44 HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults
46 NLIST_STRUCT Include nlist.h, not a.out.h, and
47 the nlist n_name element is a pointer,
49 HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'.
50 LINUX_LDAV_FILE [__linux__]: File containing load averages.
51 HAVE_LOCALE_H locale.h is available.
52 HAVE_SETLOCALE The `setlocale' function is available.
54 Specific system predefines this file uses, aside from setting
55 default values if not emacs:
58 BSD Real BSD, not just BSD-like.
61 eunice UNIX emulator under VMS.
63 __MSDOS__ No-op for MSDOS.
66 sequent Sequent Dynix 3.x.x (BSD)
67 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
68 sony_news NEWS-OS (works at least for 4.1C)
72 WINDOWS32 No-op for Windows95/NT.
73 __linux__ Linux: assumes /proc filesystem mounted.
74 Support from Michael K. Johnson.
75 __NetBSD__ NetBSD: assumes /kern filesystem mounted.
77 In addition, to avoid nesting many #ifdefs, we internally set
78 LDAV_DONE to indicate that the load average has been computed.
80 We also #define LDAV_PRIVILEGED if a program will require
81 special installation to be able to call getloadavg. */
83 /* This should always be first. */
88 #include <sys/types.h>
90 /* Both the Emacs and non-Emacs sections want this. Some
91 configuration files' definitions for the LOAD_AVE_CVT macro (like
92 sparc.h's) use macros like FSCALE, defined here. */
93 #if defined (unix) || defined (__unix)
94 # include <sys/param.h>
98 /* Exclude all the code except the test program at the end
99 if the system has its own `getloadavg' function.
101 The declaration of `errno' is needed by the test program
102 as well as the function itself, so it comes first. */
113 #ifndef HAVE_SETLOCALE
114 # define setlocale(Category, Locale) /* empty */
117 #ifndef HAVE_GETLOADAVG
119 /* The existing Emacs configuration files define a macro called
120 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
121 returns the load average multiplied by 100. What we actually want
122 is a macro called LDAV_CVT, which returns the load average as an
125 For backwards compatibility, we'll define LDAV_CVT in terms of
126 LOAD_AVE_CVT, but future machine config files should just define
127 LDAV_CVT directly. */
129 # if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
130 # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
133 # if !defined (BSD) && defined (ultrix)
134 /* Ultrix behaves like BSD on Vaxen. */
139 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
140 conflicts with the definition understood in this file, that this
144 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
145 defined to mean that the nlist method should be used, which is not true. */
149 /* Same issues as for NeXT apply to the HURD-based GNU system. */
153 # endif /* __GNU__ */
155 /* Set values that are different from the defaults, which are
156 set a little farther down with #ifndef. */
159 /* Some shorthands. */
161 # if defined (HPUX) && !defined (hpux)
165 # if defined (__hpux) && !defined (hpux)
169 # if defined (__sun) && !defined (sun)
173 # if defined(hp300) && !defined(hpux)
177 # if defined(ultrix) && defined(mips)
181 # if defined (__SVR4) && !defined (SVR4)
185 # if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
189 # if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
191 # include <sys/mbuf.h>
192 # include <sys/socket.h>
193 # include <net/route.h>
194 # include <sys/table.h>
197 # if defined (__osf__) && (defined (mips) || defined (__mips__))
199 # include <sys/table.h>
202 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
203 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
204 that with a couple of other things and we'll have a unique match. */
205 # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
206 # define tek4300 /* Define by emacs, but not by other users. */
210 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
211 # ifndef LOAD_AVE_TYPE
214 # define LOAD_AVE_TYPE long
218 # define LOAD_AVE_TYPE long
222 # define LOAD_AVE_TYPE long
226 # define LOAD_AVE_TYPE long
230 # define LOAD_AVE_TYPE long
234 # define LOAD_AVE_TYPE long
238 # define LOAD_AVE_TYPE long
242 # define LOAD_AVE_TYPE long
246 # define LOAD_AVE_TYPE long
249 # if defined (ardent) && defined (titan)
250 # define LOAD_AVE_TYPE long
254 # define LOAD_AVE_TYPE long
257 # if defined(alliant) && defined(i860) /* Alliant FX/2800 */
258 # define LOAD_AVE_TYPE long
262 # define LOAD_AVE_TYPE long
266 # define LOAD_AVE_TYPE double
268 # define LDAV_CVT(n) (n)
272 # endif /* No LOAD_AVE_TYPE. */
275 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
276 according to ghazi@noc.rutgers.edu. */
278 # define FSCALE 1024.0
281 # if defined(alliant) && defined(i860) /* Alliant FX/2800 */
282 /* <sys/param.h> defines an incorrect value for FSCALE on an
283 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
285 # define FSCALE 100.0
291 /* SunOS and some others define FSCALE in sys/param.h. */
294 # define FSCALE 2048.0
297 # if defined(MIPS) || defined(SVR4) || defined(decstation)
301 # if defined (sgi) || defined (sequent)
302 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
303 above under #ifdef MIPS. But we want the sgi value. */
305 # define FSCALE 1000.0
308 # if defined (ardent) && defined (titan)
309 # define FSCALE 65536.0
313 # define FSCALE 100.0
317 # define FSCALE 65536.0
320 # endif /* Not FSCALE. */
322 # if !defined (LDAV_CVT) && defined (FSCALE)
323 # define LDAV_CVT(n) (((double) (n)) / FSCALE)
326 # ifndef NLIST_STRUCT
328 # define NLIST_STRUCT
332 # if defined(sgi) || (defined(mips) && !defined(BSD))
333 # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
337 # if !defined (KERNEL_FILE) && defined (sequent)
338 # define KERNEL_FILE "/dynix"
341 # if !defined (KERNEL_FILE) && defined (hpux)
342 # define KERNEL_FILE "/hp-ux"
345 # if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || (defined (ardent) && defined (titan)))
346 # define KERNEL_FILE "/unix"
350 # if !defined (LDAV_SYMBOL) && defined (alliant)
351 # define LDAV_SYMBOL "_Loadavg"
354 # if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX))
355 # define LDAV_SYMBOL "avenrun"
361 /* LOAD_AVE_TYPE should only get defined if we're going to use the
363 # if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
364 # define LOAD_AVE_TYPE double
367 # ifdef LOAD_AVE_TYPE
371 # ifndef NLIST_STRUCT
373 # else /* NLIST_STRUCT */
375 # endif /* NLIST_STRUCT */
383 # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
384 # include <sys/pstat.h>
388 # define KERNEL_FILE "/vmunix"
389 # endif /* KERNEL_FILE */
392 # define LDAV_SYMBOL "_avenrun"
393 # endif /* LDAV_SYMBOL */
394 # endif /* __linux__ */
400 # include <descrip.h>
402 # include <vms/iodef.h>
407 # define LDAV_CVT(n) ((double) (n))
408 # endif /* !LDAV_CVT */
410 # endif /* LOAD_AVE_TYPE */
412 # if defined(__GNU__) && !defined (NeXT)
413 /* Note that NeXT Openstep defines __GNU__ even though it should not. */
414 /* GNU system acts much like NeXT, for load average purposes,
417 # define host_self mach_host_self
421 # ifdef HAVE_MACH_MACH_H
422 # include <mach/mach.h>
429 # include <sys/sysmp.h>
435 # include <sys/time.h>
436 # include <sys/wait.h>
437 # include <sys/syscall.h>
440 # include <machine/cpu.h>
441 # include <inq_stats/statistics.h>
442 # include <inq_stats/sysstats.h>
443 # include <inq_stats/cpustats.h>
444 # include <inq_stats/procstats.h>
445 # else /* Not UMAX_43. */
446 # include <sys/sysdefs.h>
447 # include <sys/statistics.h>
448 # include <sys/sysstats.h>
449 # include <sys/cpudefs.h>
450 # include <sys/cpustats.h>
451 # include <sys/procstats.h>
452 # endif /* Not UMAX_43. */
456 # include <sys/dg_sys_info.h>
459 # if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
462 # include <sys/file.h>
465 /* Avoid static vars inside a function since in HPUX they dump as pure. */
468 static processor_set_t default_set
;
469 static int getloadavg_initialized
;
473 static unsigned int cpus
= 0;
474 static unsigned int samples
;
478 static struct dg_sys_info_load_info load_info
; /* what-a-mouthful! */
481 #if !defined(HAVE_LIBKSTAT) && defined(LOAD_AVE_TYPE)
482 /* File descriptor open to /dev/kmem or VMS load ave driver. */
484 /* Nonzero if channel is valid. */
485 static int getloadavg_initialized
;
486 /* Offset in kmem to seek to read load average, or 0 means invalid. */
489 # if !defined(VMS) && !defined(sgi) && !defined(__linux__)
490 static struct nlist name_list
[2];
491 # endif /* Not VMS or sgi */
495 # endif /* SUNOS_5 */
497 #endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */
499 /* Put the 1 minute, 5 minute and 15 minute load averages
500 into the first NELEM elements of LOADAVG.
501 Return the number written (never more than 3, but may be less than NELEM),
502 or -1 if an error occurred. */
505 getloadavg (loadavg
, nelem
)
509 int elem
= 0; /* Return value. */
511 # ifdef NO_GET_LOAD_AVG
513 /* Set errno to zero to indicate that there was no particular error;
514 this function just can't work at all on this system. */
519 # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT)
520 /* Use libkstat because we don't have to be root. */
529 ksp
= kstat_lookup (kc
, "unix", 0, "system_misc");
532 if (kstat_read (kc
, ksp
, 0) == -1)
536 kn
= kstat_data_lookup (ksp
, "avenrun_1min");
539 /* Return -1 if no load average information is available. */
545 loadavg
[elem
++] = (double) kn
->value
.ul
/FSCALE
;
549 kn
= kstat_data_lookup (ksp
, "avenrun_5min");
552 loadavg
[elem
++] = (double) kn
->value
.ul
/FSCALE
;
556 kn
= kstat_data_lookup (ksp
, "avenrun_15min");
558 loadavg
[elem
++] = (double) kn
->value
.ul
/FSCALE
;
564 # endif /* HAVE_LIBKSTAT */
566 # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
567 /* Use pstat_getdynamic() because we don't have to be root. */
569 # undef LOAD_AVE_TYPE
571 struct pst_dynamic dyn_info
;
572 if (pstat_getdynamic (&dyn_info
, sizeof (dyn_info
), 0, 0) < 0)
575 loadavg
[elem
++] = dyn_info
.psd_avg_1_min
;
577 loadavg
[elem
++] = dyn_info
.psd_avg_5_min
;
579 loadavg
[elem
++] = dyn_info
.psd_avg_15_min
;
581 # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */
583 # if !defined (LDAV_DONE) && defined (__linux__)
585 # undef LOAD_AVE_TYPE
587 # ifndef LINUX_LDAV_FILE
588 # define LINUX_LDAV_FILE "/proc/loadavg"
595 fd
= open (LINUX_LDAV_FILE
, O_RDONLY
);
598 count
= read (fd
, ldavgbuf
, 40);
603 /* The following sscanf must use the C locale. */
604 setlocale (LC_NUMERIC
, "C");
605 count
= sscanf (ldavgbuf
, "%lf %lf %lf",
606 &load_ave
[0], &load_ave
[1], &load_ave
[2]);
607 setlocale (LC_NUMERIC
, "");
611 for (elem
= 0; elem
< nelem
&& elem
< count
; elem
++)
612 loadavg
[elem
] = load_ave
[elem
];
616 # endif /* __linux__ */
618 # if !defined (LDAV_DONE) && defined (__NetBSD__)
620 # undef LOAD_AVE_TYPE
622 # ifndef NETBSD_LDAV_FILE
623 # define NETBSD_LDAV_FILE "/kern/loadavg"
626 unsigned long int load_ave
[3], scale
;
630 fp
= fopen (NETBSD_LDAV_FILE
, "r");
633 count
= fscanf (fp
, "%lu %lu %lu %lu\n",
634 &load_ave
[0], &load_ave
[1], &load_ave
[2],
640 for (elem
= 0; elem
< nelem
; elem
++)
641 loadavg
[elem
] = (double) load_ave
[elem
] / (double) scale
;
645 # endif /* __NetBSD__ */
647 # if !defined (LDAV_DONE) && defined (NeXT)
649 /* The NeXT code was adapted from iscreen 3.2. */
652 struct processor_set_basic_info info
;
655 /* We only know how to get the 1-minute average for this system,
656 so even if the caller asks for more than 1, we only return 1. */
658 if (!getloadavg_initialized
)
660 if (processor_set_default (host_self (), &default_set
) == KERN_SUCCESS
)
661 getloadavg_initialized
= 1;
664 if (getloadavg_initialized
)
666 info_count
= PROCESSOR_SET_BASIC_INFO_COUNT
;
667 if (processor_set_info (default_set
, PROCESSOR_SET_BASIC_INFO
, &host
,
668 (processor_set_info_t
) &info
, &info_count
)
670 getloadavg_initialized
= 0;
674 loadavg
[elem
++] = (double) info
.load_average
/ LOAD_SCALE
;
678 if (!getloadavg_initialized
)
682 # if !defined (LDAV_DONE) && defined (UMAX)
684 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
685 have a /dev/kmem. Information about the workings of the running kernel
686 can be gathered with inq_stats system calls.
687 We only know how to get the 1-minute average for this system. */
689 struct proc_summary proc_sum_data
;
690 struct stat_descr proc_info
;
692 register unsigned int i
, j
;
696 register unsigned int c
, i
;
697 struct cpu_config conf
;
698 struct stat_descr desc
;
701 desc
.sd_subsys
= SUBSYS_CPU
;
702 desc
.sd_type
= CPUTYPE_CONFIG
;
703 desc
.sd_addr
= (char *) &conf
;
704 desc
.sd_size
= sizeof conf
;
706 if (inq_stats (1, &desc
))
710 for (i
= 0; i
< conf
.config_maxclass
; ++i
)
712 struct class_stats stats
;
713 memset (&stats
, 0, sizeof stats
);
715 desc
.sd_type
= CPUTYPE_CLASS
;
717 desc
.sd_addr
= (char *) &stats
;
718 desc
.sd_size
= sizeof stats
;
720 if (inq_stats (1, &desc
))
723 c
+= stats
.class_numcpus
;
726 samples
= cpus
< 2 ? 3 : (2 * cpus
/ 3);
729 proc_info
.sd_next
= 0;
730 proc_info
.sd_subsys
= SUBSYS_PROC
;
731 proc_info
.sd_type
= PROCTYPE_SUMMARY
;
732 proc_info
.sd_addr
= (char *) &proc_sum_data
;
733 proc_info
.sd_size
= sizeof (struct proc_summary
);
734 proc_info
.sd_sizeused
= 0;
736 if (inq_stats (1, &proc_info
) != 0)
739 load
= proc_sum_data
.ps_nrunnable
;
741 for (i
= samples
- 1; i
> 0; --i
)
743 load
+= proc_sum_data
.ps_nrun
[j
];
744 if (j
++ == PS_NRUNSIZE
)
749 loadavg
[elem
++] = load
/ samples
/ cpus
;
752 # if !defined (LDAV_DONE) && defined (DGUX)
754 /* This call can return -1 for an error, but with good args
755 it's not supposed to fail. The first argument is for no
756 apparent reason of type `long int *'. */
757 dg_sys_info ((long int *) &load_info
,
758 DG_SYS_INFO_LOAD_INFO_TYPE
,
759 DG_SYS_INFO_LOAD_VERSION_0
);
762 loadavg
[elem
++] = load_info
.one_minute
;
764 loadavg
[elem
++] = load_info
.five_minute
;
766 loadavg
[elem
++] = load_info
.fifteen_minute
;
769 # if !defined (LDAV_DONE) && defined (apollo)
771 /* Apollo code from lisch@mentorg.com (Ray Lischner).
773 This system call is not documented. The load average is obtained as
774 three long integers, for the load average over the past minute,
775 five minutes, and fifteen minutes. Each value is a scaled integer,
776 with 16 bits of integer part and 16 bits of fraction part.
778 I'm not sure which operating system first supported this system call,
779 but I know that SR10.2 supports it. */
781 extern void proc1_$
get_loadav ();
782 unsigned long load_ave
[3];
784 proc1_$
get_loadav (load_ave
);
787 loadavg
[elem
++] = load_ave
[0] / 65536.0;
789 loadavg
[elem
++] = load_ave
[1] / 65536.0;
791 loadavg
[elem
++] = load_ave
[2] / 65536.0;
794 # if !defined (LDAV_DONE) && defined (OSF_MIPS)
797 struct tbl_loadavg load_ave
;
798 table (TBL_LOADAVG
, 0, &load_ave
, 1, sizeof (load_ave
));
800 = (load_ave
.tl_lscale
== 0
801 ? load_ave
.tl_avenrun
.d
[0]
802 : (load_ave
.tl_avenrun
.l
[0] / (double) load_ave
.tl_lscale
));
803 # endif /* OSF_MIPS */
805 # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32))
808 /* A faithful emulation is going to have to be saved for a rainy day. */
809 for ( ; elem
< nelem
; elem
++)
813 # endif /* __MSDOS__ || WINDOWS32 */
815 # if !defined (LDAV_DONE) && defined (OSF_ALPHA)
818 struct tbl_loadavg load_ave
;
819 table (TBL_LOADAVG
, 0, &load_ave
, 1, sizeof (load_ave
));
820 for (elem
= 0; elem
< nelem
; elem
++)
822 = (load_ave
.tl_lscale
== 0
823 ? load_ave
.tl_avenrun
.d
[elem
]
824 : (load_ave
.tl_avenrun
.l
[elem
] / (double) load_ave
.tl_lscale
));
825 # endif /* OSF_ALPHA */
827 # if !defined (LDAV_DONE) && defined (VMS)
828 /* VMS specific code -- read from the Load Ave driver. */
830 LOAD_AVE_TYPE load_ave
[3];
831 static int getloadavg_initialized
= 0;
840 /* Ensure that there is a channel open to the load ave device. */
841 if (!getloadavg_initialized
)
843 /* Attempt to open the channel. */
845 descriptor
.dsc$w_length
= 18;
846 descriptor
.dsc$a_pointer
= "$$VMS_LOAD_AVERAGE";
848 $
DESCRIPTOR (descriptor
, "LAV0:");
850 if (sys$
assign (&descriptor
, &channel
, 0, 0) & 1)
851 getloadavg_initialized
= 1;
854 /* Read the load average vector. */
855 if (getloadavg_initialized
856 && !(sys$
qiow (0, channel
, IO$_READVBLK
, 0, 0, 0,
857 load_ave
, 12, 0, 0, 0, 0) & 1))
859 sys$
dassgn (channel
);
860 getloadavg_initialized
= 0;
863 if (!getloadavg_initialized
)
867 # if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS)
869 /* UNIX-specific code -- read the average from /dev/kmem. */
871 # define LDAV_PRIVILEGED /* This code requires special installation. */
873 LOAD_AVE_TYPE load_ave
[3];
875 /* Get the address of LDAV_SYMBOL. */
879 # ifndef NLIST_STRUCT
880 strcpy (name_list
[0].n_name
, LDAV_SYMBOL
);
881 strcpy (name_list
[1].n_name
, "");
882 # else /* NLIST_STRUCT */
883 # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
884 name_list
[0].n_un
.n_name
= LDAV_SYMBOL
;
885 name_list
[1].n_un
.n_name
= 0;
886 # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
887 name_list
[0].n_name
= LDAV_SYMBOL
;
888 name_list
[1].n_name
= 0;
889 # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
890 # endif /* NLIST_STRUCT */
894 # if !(defined (_AIX) && !defined (ps2))
895 nlist (KERNEL_FILE
, name_list
)
897 knlist (name_list
, 1, sizeof (name_list
[0]))
900 /* Omit "&& name_list[0].n_type != 0 " -- it breaks on Sun386i. */
902 # ifdef FIXUP_KERNEL_SYMBOL_ADDR
903 FIXUP_KERNEL_SYMBOL_ADDR (name_list
);
905 offset
= name_list
[0].n_value
;
907 # endif /* !SUNOS_5 */
911 ldav_off
= sysmp (MP_KERNADDR
, MPKA_AVENRUN
);
913 offset
= (long) ldav_off
& 0x7fffffff;
917 /* Make sure we have /dev/kmem open. */
918 if (!getloadavg_initialized
)
921 channel
= open ("/dev/kmem", 0);
924 /* Set the channel to close on exec, so it does not
925 litter any child's descriptor table. */
928 # define FD_CLOEXEC 1
930 (void) fcntl (channel
, F_SETFD
, FD_CLOEXEC
);
932 getloadavg_initialized
= 1;
935 /* We pass 0 for the kernel, corefile, and swapfile names
936 to use the currently running kernel. */
937 kd
= kvm_open (0, 0, 0, O_RDONLY
, 0);
940 /* nlist the currently running kernel. */
941 kvm_nlist (kd
, name_list
);
942 offset
= name_list
[0].n_value
;
943 getloadavg_initialized
= 1;
945 # endif /* SUNOS_5 */
948 /* If we can, get the load average values. */
949 if (offset
&& getloadavg_initialized
)
951 /* Try to read the load. */
953 if (lseek (channel
, offset
, 0) == -1L
954 || read (channel
, (char *) load_ave
, sizeof (load_ave
))
955 != sizeof (load_ave
))
958 getloadavg_initialized
= 0;
961 if (kvm_read (kd
, offset
, (char *) load_ave
, sizeof (load_ave
))
962 != sizeof (load_ave
))
965 getloadavg_initialized
= 0;
967 # endif /* SUNOS_5 */
970 if (offset
== 0 || !getloadavg_initialized
)
972 # endif /* LOAD_AVE_TYPE and not VMS */
974 # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
976 loadavg
[elem
++] = LDAV_CVT (load_ave
[0]);
978 loadavg
[elem
++] = LDAV_CVT (load_ave
[1]);
980 loadavg
[elem
++] = LDAV_CVT (load_ave
[2]);
983 # endif /* !LDAV_DONE && LOAD_AVE_TYPE */
988 /* Set errno to zero to indicate that there was no particular error;
989 this function just can't work at all on this system. */
995 #endif /* ! HAVE_GETLOADAVG */
1006 naptime
= atoi (argv
[1]);
1013 errno
= 0; /* Don't be misled if it doesn't set errno. */
1014 loads
= getloadavg (avg
, 3);
1017 perror ("Error getting load average");
1021 printf ("1-minute: %f ", avg
[0]);
1023 printf ("5-minute: %f ", avg
[1]);
1025 printf ("15-minute: %f ", avg
[2]);