1 /* Get the system load averages.
3 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994,
4 1995, 1997, 1999, 2000, 2003, 2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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) ((char *) NULL)
120 #ifndef HAVE_GETLOADAVG
122 /* The existing Emacs configuration files define a macro called
123 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
124 returns the load average multiplied by 100. What we actually want
125 is a macro called LDAV_CVT, which returns the load average as an
128 For backwards compatibility, we'll define LDAV_CVT in terms of
129 LOAD_AVE_CVT, but future machine config files should just define
130 LDAV_CVT directly. */
132 # if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT)
133 # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
136 # if !defined (BSD) && defined (ultrix)
137 /* Ultrix behaves like BSD on Vaxen. */
142 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
143 conflicts with the definition understood in this file, that this
147 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
148 defined to mean that the nlist method should be used, which is not true. */
152 /* Same issues as for NeXT apply to the HURD-based GNU system. */
156 # endif /* __GNU__ */
158 /* Set values that are different from the defaults, which are
159 set a little farther down with #ifndef. */
162 /* Some shorthands. */
164 # if defined (HPUX) && !defined (hpux)
168 # if defined (__hpux) && !defined (hpux)
172 # if defined (__sun) && !defined (sun)
176 # if defined (hp300) && !defined (hpux)
180 # if defined (ultrix) && defined (mips)
184 # if defined (__SVR4) && !defined (SVR4)
188 # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2)
192 # if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
194 # include <sys/mbuf.h>
195 # include <sys/socket.h>
196 # include <net/route.h>
197 # include <sys/table.h>
200 # if defined (__osf__) && (defined (mips) || defined (__mips__))
202 # include <sys/table.h>
205 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
206 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
207 that with a couple of other things and we'll have a unique match. */
208 # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
209 # define tek4300 /* Define by emacs, but not by other users. */
213 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
214 # ifndef LOAD_AVE_TYPE
217 # define LOAD_AVE_TYPE long
221 # define LOAD_AVE_TYPE long
225 # define LOAD_AVE_TYPE long
229 # define LOAD_AVE_TYPE long
233 # define LOAD_AVE_TYPE long
237 # define LOAD_AVE_TYPE long
241 # define LOAD_AVE_TYPE long
245 # define LOAD_AVE_TYPE long
249 # define LOAD_AVE_TYPE long
252 # if defined (ardent) && defined (titan)
253 # define LOAD_AVE_TYPE long
257 # define LOAD_AVE_TYPE long
260 # if defined (alliant) && defined (i860) /* Alliant FX/2800 */
261 # define LOAD_AVE_TYPE long
265 # define LOAD_AVE_TYPE long
269 # define LOAD_AVE_TYPE double
271 # define LDAV_CVT(n) (n)
275 # endif /* No LOAD_AVE_TYPE. */
278 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
279 according to ghazi@noc.rutgers.edu. */
281 # define FSCALE 1024.0
284 # if defined (alliant) && defined (i860) /* Alliant FX/2800 */
285 /* <sys/param.h> defines an incorrect value for FSCALE on an
286 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
288 # define FSCALE 100.0
294 /* SunOS and some others define FSCALE in sys/param.h. */
297 # define FSCALE 2048.0
300 # if defined (MIPS) || defined (SVR4) || defined (decstation)
304 # if defined (sgi) || defined (sequent)
305 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
306 above under #ifdef MIPS. But we want the sgi value. */
308 # define FSCALE 1000.0
311 # if defined (ardent) && defined (titan)
312 # define FSCALE 65536.0
316 # define FSCALE 100.0
320 # define FSCALE 65536.0
323 # endif /* Not FSCALE. */
325 # if !defined (LDAV_CVT) && defined (FSCALE)
326 # define LDAV_CVT(n) (((double) (n)) / FSCALE)
329 # ifndef NLIST_STRUCT
331 # define NLIST_STRUCT
335 # if defined (sgi) || (defined (mips) && !defined (BSD))
336 # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
340 # if !defined (KERNEL_FILE) && defined (sequent)
341 # define KERNEL_FILE "/dynix"
344 # if !defined (KERNEL_FILE) && defined (hpux)
345 # define KERNEL_FILE "/hp-ux"
348 # if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)))
349 # define KERNEL_FILE "/unix"
353 # if !defined (LDAV_SYMBOL) && defined (alliant)
354 # define LDAV_SYMBOL "_Loadavg"
357 # if !defined (LDAV_SYMBOL) && ((defined (hpux) && !defined (hp9000s300)) || defined (_SEQUENT_) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)) || defined (_AIX))
358 # define LDAV_SYMBOL "avenrun"
361 # ifdef HAVE_UNISTD_H
367 /* LOAD_AVE_TYPE should only get defined if we're going to use the
369 # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL))
370 # define LOAD_AVE_TYPE double
373 # ifdef LOAD_AVE_TYPE
377 # ifndef NLIST_STRUCT
379 # else /* NLIST_STRUCT */
381 # endif /* NLIST_STRUCT */
389 # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
390 # include <sys/pstat.h>
394 # define KERNEL_FILE "/vmunix"
395 # endif /* KERNEL_FILE */
398 # define LDAV_SYMBOL "_avenrun"
399 # endif /* LDAV_SYMBOL */
400 # endif /* __linux__ */
406 # include <descrip.h>
408 # include <vms/iodef.h>
413 # define LDAV_CVT(n) ((double) (n))
414 # endif /* !LDAV_CVT */
416 # endif /* LOAD_AVE_TYPE */
418 # if defined (__GNU__) && !defined (NeXT)
419 /* Note that NeXT Openstep defines __GNU__ even though it should not. */
420 /* GNU system acts much like NeXT, for load average purposes,
423 # define host_self mach_host_self
427 # ifdef HAVE_MACH_MACH_H
428 # include <mach/mach.h>
435 # include <sys/sysmp.h>
441 # include <sys/time.h>
442 # include <sys/wait.h>
443 # include <sys/syscall.h>
446 # include <machine/cpu.h>
447 # include <inq_stats/statistics.h>
448 # include <inq_stats/sysstats.h>
449 # include <inq_stats/cpustats.h>
450 # include <inq_stats/procstats.h>
451 # else /* Not UMAX_43. */
452 # include <sys/sysdefs.h>
453 # include <sys/statistics.h>
454 # include <sys/sysstats.h>
455 # include <sys/cpudefs.h>
456 # include <sys/cpustats.h>
457 # include <sys/procstats.h>
458 # endif /* Not UMAX_43. */
462 # include <sys/dg_sys_info.h>
465 # if defined (HAVE_FCNTL_H) || defined (_POSIX_VERSION)
468 # include <sys/file.h>
471 /* Avoid static vars inside a function since in HPUX they dump as pure. */
474 static processor_set_t default_set;
475 static int getloadavg_initialized;
479 static unsigned int cpus = 0;
480 static unsigned int samples;
484 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
487 # if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE)
488 /* File descriptor open to /dev/kmem or VMS load ave driver. */
490 /* Nonzero iff channel is valid. */
491 static int getloadavg_initialized;
492 /* Offset in kmem to seek to read load average, or 0 means invalid. */
495 # if !defined (VMS) && !defined (sgi) && !defined (__linux__)
496 static struct nlist nl[2];
497 # endif /* Not VMS or sgi */
501 # endif /* SUNOS_5 */
503 # endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */
505 /* Put the 1 minute, 5 minute and 15 minute load averages
506 into the first NELEM elements of LOADAVG.
507 Return the number written (never more than 3, but may be less than NELEM),
508 or -1 if an error occurred. */
511 getloadavg (double loadavg[], int nelem)
513 int elem = 0; /* Return value. */
515 # ifdef NO_GET_LOAD_AVG
517 /* Set errno to zero to indicate that there was no particular error;
518 this function just can't work at all on this system. */
523 # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT)
524 /* Use libkstat because we don't have to be root. */
533 ksp = kstat_lookup (kc, "unix", 0, "system_misc");
536 if (kstat_read (kc, ksp, 0) == -1)
540 kn = kstat_data_lookup (ksp, "avenrun_1min");
543 /* Return -1 if no load average information is available. */
549 loadavg[elem++] = (double) kn->value.ul / FSCALE;
553 kn = kstat_data_lookup (ksp, "avenrun_5min");
556 loadavg[elem++] = (double) kn->value.ul / FSCALE;
560 kn = kstat_data_lookup (ksp, "avenrun_15min");
562 loadavg[elem++] = (double) kn->value.ul / FSCALE;
568 # endif /* HAVE_LIBKSTAT */
570 # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
571 /* Use pstat_getdynamic() because we don't have to be root. */
573 # undef LOAD_AVE_TYPE
575 struct pst_dynamic dyn_info;
576 if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0)
579 loadavg[elem++] = dyn_info.psd_avg_1_min;
581 loadavg[elem++] = dyn_info.psd_avg_5_min;
583 loadavg[elem++] = dyn_info.psd_avg_15_min;
585 # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */
587 # if !defined (LDAV_DONE) && defined (__linux__)
589 # undef LOAD_AVE_TYPE
591 # ifndef LINUX_LDAV_FILE
592 # define LINUX_LDAV_FILE "/proc/loadavg"
600 fd = open (LINUX_LDAV_FILE, O_RDONLY);
603 count = read (fd, ldavgbuf, 40);
608 /* The following sscanf must use the C locale. */
609 old_locale = xstrdup (setlocale (LC_NUMERIC, NULL));
610 setlocale (LC_NUMERIC, "C");
611 count = sscanf (ldavgbuf, "%lf %lf %lf",
612 &load_ave[0], &load_ave[1], &load_ave[2]);
613 setlocale (LC_NUMERIC, old_locale);
618 for (elem = 0; elem < nelem && elem < count; elem++)
619 loadavg[elem] = load_ave[elem];
623 # endif /* __linux__ */
625 # if !defined (LDAV_DONE) && defined (__NetBSD__)
627 # undef LOAD_AVE_TYPE
629 # ifndef NETBSD_LDAV_FILE
630 # define NETBSD_LDAV_FILE "/kern/loadavg"
633 unsigned long int load_ave[3], scale;
637 fp = fopen (NETBSD_LDAV_FILE, "r");
640 count = fscanf (fp, "%lu %lu %lu %lu\n",
641 &load_ave[0], &load_ave[1], &load_ave[2],
647 for (elem = 0; elem < nelem; elem++)
648 loadavg[elem] = (double) load_ave[elem] / (double) scale;
652 # endif /* __NetBSD__ */
654 # if !defined (LDAV_DONE) && defined (NeXT)
656 /* The NeXT code was adapted from iscreen 3.2. */
659 struct processor_set_basic_info info;
662 /* We only know how to get the 1-minute average for this system,
663 so even if the caller asks for more than 1, we only return 1. */
665 if (!getloadavg_initialized)
667 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
668 getloadavg_initialized = 1;
671 if (getloadavg_initialized)
673 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
674 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
675 (processor_set_info_t) &info, &info_count)
677 getloadavg_initialized = 0;
681 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
685 if (!getloadavg_initialized)
689 # if !defined (LDAV_DONE) && defined (UMAX)
691 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
692 have a /dev/kmem. Information about the workings of the running kernel
693 can be gathered with inq_stats system calls.
694 We only know how to get the 1-minute average for this system. */
696 struct proc_summary proc_sum_data;
697 struct stat_descr proc_info;
699 register unsigned int i, j;
703 register unsigned int c, i;
704 struct cpu_config conf;
705 struct stat_descr desc;
708 desc.sd_subsys = SUBSYS_CPU;
709 desc.sd_type = CPUTYPE_CONFIG;
710 desc.sd_addr = (char *) &conf;
711 desc.sd_size = sizeof conf;
713 if (inq_stats (1, &desc))
717 for (i = 0; i < conf.config_maxclass; ++i)
719 struct class_stats stats;
720 bzero ((char *) &stats, sizeof stats);
722 desc.sd_type = CPUTYPE_CLASS;
724 desc.sd_addr = (char *) &stats;
725 desc.sd_size = sizeof stats;
727 if (inq_stats (1, &desc))
730 c += stats.class_numcpus;
733 samples = cpus < 2 ? 3 : (2 * cpus / 3);
736 proc_info.sd_next = 0;
737 proc_info.sd_subsys = SUBSYS_PROC;
738 proc_info.sd_type = PROCTYPE_SUMMARY;
739 proc_info.sd_addr = (char *) &proc_sum_data;
740 proc_info.sd_size = sizeof (struct proc_summary);
741 proc_info.sd_sizeused = 0;
743 if (inq_stats (1, &proc_info) != 0)
746 load = proc_sum_data.ps_nrunnable;
748 for (i = samples - 1; i > 0; --i)
750 load += proc_sum_data.ps_nrun[j];
751 if (j++ == PS_NRUNSIZE)
756 loadavg[elem++] = load / samples / cpus;
759 # if !defined (LDAV_DONE) && defined (DGUX)
761 /* This call can return -1 for an error, but with good args
762 it's not supposed to fail. The first argument is for no
763 apparent reason of type `long int *'. */
764 dg_sys_info ((long int *) &load_info,
765 DG_SYS_INFO_LOAD_INFO_TYPE,
766 DG_SYS_INFO_LOAD_VERSION_0);
769 loadavg[elem++] = load_info.one_minute;
771 loadavg[elem++] = load_info.five_minute;
773 loadavg[elem++] = load_info.fifteen_minute;
776 # if !defined (LDAV_DONE) && defined (apollo)
778 /* Apollo code from lisch@mentorg.com (Ray Lischner).
780 This system call is not documented. The load average is obtained as
781 three long integers, for the load average over the past minute,
782 five minutes, and fifteen minutes. Each value is a scaled integer,
783 with 16 bits of integer part and 16 bits of fraction part.
785 I'm not sure which operating system first supported this system call,
786 but I know that SR10.2 supports it. */
788 extern void proc1_$get_loadav ();
789 unsigned long load_ave[3];
791 proc1_$get_loadav (load_ave);
794 loadavg[elem++] = load_ave[0] / 65536.0;
796 loadavg[elem++] = load_ave[1] / 65536.0;
798 loadavg[elem++] = load_ave[2] / 65536.0;
801 # if !defined (LDAV_DONE) && defined (OSF_MIPS)
804 struct tbl_loadavg load_ave;
805 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
807 = (load_ave.tl_lscale == 0
808 ? load_ave.tl_avenrun.d[0]
809 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
810 # endif /* OSF_MIPS */
812 # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32))
815 /* A faithful emulation is going to have to be saved for a rainy day. */
816 for ( ; elem < nelem; elem++)
820 # endif /* __MSDOS__ || WINDOWS32 */
822 # if !defined (LDAV_DONE) && defined (OSF_ALPHA)
825 struct tbl_loadavg load_ave;
826 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
827 for (elem = 0; elem < nelem; elem++)
829 = (load_ave.tl_lscale == 0
830 ? load_ave.tl_avenrun.d[elem]
831 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
832 # endif /* OSF_ALPHA */
834 # if !defined (LDAV_DONE) && defined (VMS)
835 /* VMS specific code -- read from the Load Ave driver. */
837 LOAD_AVE_TYPE load_ave[3];
838 static int getloadavg_initialized = 0;
847 /* Ensure that there is a channel open to the load ave device. */
848 if (!getloadavg_initialized)
850 /* Attempt to open the channel. */
852 descriptor.dsc$w_length = 18;
853 descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE";
855 $DESCRIPTOR (descriptor, "LAV0:");
857 if (sys$assign (&descriptor, &channel, 0, 0) & 1)
858 getloadavg_initialized = 1;
861 /* Read the load average vector. */
862 if (getloadavg_initialized
863 && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0,
864 load_ave, 12, 0, 0, 0, 0) & 1))
866 sys$dassgn (channel);
867 getloadavg_initialized = 0;
870 if (!getloadavg_initialized)
874 # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) && !defined (VMS)
876 /* UNIX-specific code -- read the average from /dev/kmem. */
878 # define LDAV_PRIVILEGED /* This code requires special installation. */
880 LOAD_AVE_TYPE load_ave[3];
882 /* Get the address of LDAV_SYMBOL. */
886 # ifndef NLIST_STRUCT
887 strcpy (nl[0].n_name, LDAV_SYMBOL);
888 strcpy (nl[1].n_name, "");
889 # else /* NLIST_STRUCT */
890 # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
891 nl[0].n_un.n_name = LDAV_SYMBOL;
892 nl[1].n_un.n_name = 0;
893 # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
894 nl[0].n_name = LDAV_SYMBOL;
896 # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
897 # endif /* NLIST_STRUCT */
901 # if !(defined (_AIX) && !defined (ps2))
902 nlist (KERNEL_FILE, nl)
904 knlist (nl, 1, sizeof (nl[0]))
907 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
909 # ifdef FIXUP_KERNEL_SYMBOL_ADDR
910 FIXUP_KERNEL_SYMBOL_ADDR (nl);
912 offset = nl[0].n_value;
914 # endif /* !SUNOS_5 */
918 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
920 offset = (long) ldav_off & 0x7fffffff;
924 /* Make sure we have /dev/kmem open. */
925 if (!getloadavg_initialized)
928 channel = open ("/dev/kmem", 0);
931 /* Set the channel to close on exec, so it does not
932 litter any child's descriptor table. */
933 set_cloexec_flag (channel, true);
934 getloadavg_initialized = 1;
937 /* We pass 0 for the kernel, corefile, and swapfile names
938 to use the currently running kernel. */
939 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
942 /* nlist the currently running kernel. */
944 offset = nl[0].n_value;
945 getloadavg_initialized = 1;
947 # endif /* SUNOS_5 */
950 /* If we can, get the load average values. */
951 if (offset && getloadavg_initialized)
953 /* Try to read the load. */
955 if (lseek (channel, offset, 0) == -1L
956 || read (channel, (char *) load_ave, sizeof (load_ave))
957 != sizeof (load_ave))
960 getloadavg_initialized = 0;
963 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
964 != sizeof (load_ave))
967 getloadavg_initialized = 0;
969 # endif /* SUNOS_5 */
972 if (offset == 0 || !getloadavg_initialized)
974 # endif /* LOAD_AVE_TYPE and not VMS */
976 # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
978 loadavg[elem++] = LDAV_CVT (load_ave[0]);
980 loadavg[elem++] = LDAV_CVT (load_ave[1]);
982 loadavg[elem++] = LDAV_CVT (load_ave[2]);
985 # endif /* !LDAV_DONE && LOAD_AVE_TYPE */
990 /* Set errno to zero to indicate that there was no particular error;
991 this function just can't work at all on this system. */
997 #endif /* ! HAVE_GETLOADAVG */
1001 main (int argc, char **argv)
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]);