1 /* Get the system load averages.
3 Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2010 Free Software
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 3 of the License, or
12 (at your option) any later version.
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, see <http://www.gnu.org/licenses/>. */
22 /* Compile-time symbols that this file uses:
24 HAVE_PSTAT_GETDYNAMIC Define this if your system has the
25 pstat_getdynamic function. I think it
26 is unique to HPUX9. The best way to get the
27 definition is through the AC_FUNC_GETLOADAVG
28 macro that comes with autoconf 2.13 or newer.
29 If that isn't an option, then just put
30 AC_CHECK_FUNCS(pstat_getdynamic) in your
32 HAVE_LIBPERFSTAT Define this if your system has the
33 perfstat_cpu_total function in libperfstat (AIX).
34 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
35 KERNEL_FILE Name of the kernel file 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.
47 N_NAME_POINTER 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__, __CYGWIN__]: File containing
53 Specific system predefines this file uses, aside from setting
54 default values if not emacs:
57 BSD Real BSD, not just BSD-like.
60 eunice UNIX emulator under VMS.
62 __MSDOS__ No-op for MSDOS.
65 sequent Sequent Dynix 3.x.x (BSD)
66 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
67 sony_news NEWS-OS (works at least for 4.1C)
71 WINDOWS32 No-op for Windows95/NT.
72 __linux__ Linux: assumes /proc file system mounted.
73 Support from Michael K. Johnson.
74 __CYGWIN__ Cygwin emulates linux /proc/loadavg.
75 __NetBSD__ NetBSD: assumes /kern file system 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 /* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems
84 with partially-configured source directories. */
86 #ifndef CONFIGURING_GETLOADAVG
97 /* Exclude all the code except the test program at the end
98 if the system has its own `getloadavg' function. */
100 #ifndef HAVE_GETLOADAVG
102 # include <sys/types.h>
104 /* Both the Emacs and non-Emacs sections want this. Some
105 configuration files' definitions for the LOAD_AVE_CVT macro (like
106 sparc.h's) use macros like FSCALE, defined here. */
107 # if defined (unix) || defined (__unix)
108 # include <sys/param.h>
111 # include "c-strtod.h"
112 # include "cloexec.h"
113 # include "intprops.h"
116 /* The existing Emacs configuration files define a macro called
117 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
118 returns the load average multiplied by 100. What we actually want
119 is a macro called LDAV_CVT, which returns the load average as an
122 For backwards compatibility, we'll define LDAV_CVT in terms of
123 LOAD_AVE_CVT, but future machine config files should just define
124 LDAV_CVT directly. */
126 # if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT)
127 # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
130 # if !defined (BSD) && defined (ultrix)
131 /* Ultrix behaves like BSD on Vaxen. */
136 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
137 conflicts with the definition understood in this file, that this
141 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
142 defined to mean that the nlist method should be used, which is not true. */
146 /* Same issues as for NeXT apply to the HURD-based GNU system. */
150 # endif /* __GNU__ */
152 /* Set values that are different from the defaults, which are
153 set a little farther down with #ifndef. */
156 /* Some shorthands. */
158 # if defined (HPUX) && !defined (hpux)
162 # if defined (__hpux) && !defined (hpux)
166 # if defined (__sun) && !defined (sun)
170 # if defined (hp300) && !defined (hpux)
174 # if defined (ultrix) && defined (mips)
178 # if defined (__SVR4) && !defined (SVR4)
182 # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2)
186 # if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
188 # include <sys/mbuf.h>
189 # include <sys/socket.h>
190 # include <net/route.h>
191 # include <sys/table.h>
192 /* Tru64 4.0D's table.h redefines sys */
196 # if defined (__osf__) && (defined (mips) || defined (__mips__))
198 # include <sys/table.h>
201 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
202 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
203 that with a couple of other things and we'll have a unique match. */
204 # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
205 # define tek4300 /* Define by emacs, but not by other users. */
209 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
210 # ifndef LOAD_AVE_TYPE
213 # define LOAD_AVE_TYPE long
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
248 # if defined (ardent) && defined (titan)
249 # define LOAD_AVE_TYPE long
253 # define LOAD_AVE_TYPE long
256 # if defined (alliant) && defined (i860) /* Alliant FX/2800 */
257 # define LOAD_AVE_TYPE long
260 # if defined _AIX && ! defined HAVE_LIBPERFSTAT
261 # define LOAD_AVE_TYPE long
265 # define LOAD_AVE_TYPE double
267 # define LDAV_CVT(n) (n)
271 # endif /* No LOAD_AVE_TYPE. */
274 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
275 according to ghazi@noc.rutgers.edu. */
277 # define FSCALE 1024.0
280 # if defined (alliant) && defined (i860) /* Alliant FX/2800 */
281 /* <sys/param.h> defines an incorrect value for FSCALE on an
282 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
284 # define FSCALE 100.0
290 /* SunOS and some others define FSCALE in sys/param.h. */
293 # define FSCALE 2048.0
296 # if defined (MIPS) || defined (SVR4) || defined (decstation)
300 # if defined (sgi) || defined (sequent)
301 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
302 above under #ifdef MIPS. But we want the sgi value. */
304 # define FSCALE 1000.0
307 # if defined (ardent) && defined (titan)
308 # define FSCALE 65536.0
312 # define FSCALE 100.0
315 # if defined _AIX && !defined HAVE_LIBPERFSTAT
316 # define FSCALE 65536.0
319 # endif /* Not FSCALE. */
321 # if !defined (LDAV_CVT) && defined (FSCALE)
322 # define LDAV_CVT(n) (((double) (n)) / FSCALE)
325 # ifndef NLIST_STRUCT
327 # define NLIST_STRUCT
331 # if defined (sgi) || (defined (mips) && !defined (BSD))
332 # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
336 # if !defined (KERNEL_FILE) && defined (sequent)
337 # define KERNEL_FILE "/dynix"
340 # if !defined (KERNEL_FILE) && defined (hpux)
341 # define KERNEL_FILE "/hp-ux"
344 # if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)))
345 # define KERNEL_FILE "/unix"
349 # if !defined (LDAV_SYMBOL) && defined (alliant)
350 # define LDAV_SYMBOL "_Loadavg"
353 # if !defined (LDAV_SYMBOL) && ((defined (hpux) && !defined (hp9000s300)) || defined (_SEQUENT_) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)) || (defined (_AIX) && !defined(HAVE_LIBPERFSTAT)))
354 # define LDAV_SYMBOL "avenrun"
359 /* LOAD_AVE_TYPE should only get defined if we're going to use the
361 # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL))
362 # define LOAD_AVE_TYPE double
365 # ifdef LOAD_AVE_TYPE
369 # ifndef NLIST_STRUCT
371 # else /* NLIST_STRUCT */
373 # endif /* NLIST_STRUCT */
381 # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
382 # include <sys/pstat.h>
386 # define KERNEL_FILE "/vmunix"
387 # endif /* KERNEL_FILE */
390 # define LDAV_SYMBOL "_avenrun"
391 # endif /* LDAV_SYMBOL */
392 # endif /* __linux__ */
398 # include <descrip.h>
400 # include <vms/iodef.h>
405 # define LDAV_CVT(n) ((double) (n))
406 # endif /* !LDAV_CVT */
408 # endif /* LOAD_AVE_TYPE */
410 # if defined HAVE_LIBPERFSTAT
411 # include <sys/protosw.h>
412 # include <libperfstat.h>
413 # include <sys/proc.h>
419 # if defined (__GNU__) && !defined (NeXT)
420 /* Note that NeXT Openstep defines __GNU__ even though it should not. */
421 /* GNU system acts much like NeXT, for load average purposes,
424 # define host_self mach_host_self
428 # ifdef HAVE_MACH_MACH_H
429 # include <mach/mach.h>
436 # 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 # include "fcntl--.h"
467 /* Avoid static vars inside a function since in HPUX they dump as pure. */
470 static processor_set_t default_set;
471 static bool getloadavg_initialized;
475 static unsigned int cpus = 0;
476 static unsigned int samples;
480 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
483 # if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE)
484 /* File descriptor open to /dev/kmem or VMS load ave driver. */
486 /* True iff channel is valid. */
487 static bool getloadavg_initialized;
488 /* Offset in kmem to seek to read load average, or 0 means invalid. */
491 # if ! defined __VMS && ! defined sgi && ! defined __linux__
492 static struct nlist nl[2];
497 # endif /* SUNOS_5 */
499 # endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */
501 /* Put the 1 minute, 5 minute and 15 minute load averages
502 into the first NELEM elements of LOADAVG.
503 Return the number written (never more than 3, but may be less than NELEM),
504 or -1 if an error occurred. */
507 getloadavg (double loadavg[], int 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 HAVE_LIBPERFSTAT
585 # undef LOAD_AVE_TYPE
586 /* Use perfstat_cpu_total because we don't have to be root. */
588 perfstat_cpu_total_t cpu_stats;
589 int result = perfstat_cpu_total (NULL, &cpu_stats, sizeof cpu_stats, 1);
592 loadavg[0] = cpu_stats.loadavg[0] / (double)(1 << SBITS);
593 loadavg[1] = cpu_stats.loadavg[1] / (double)(1 << SBITS);
594 loadavg[2] = cpu_stats.loadavg[2] / (double)(1 << SBITS);
599 # if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__))
601 # undef LOAD_AVE_TYPE
603 # ifndef LINUX_LDAV_FILE
604 # define LINUX_LDAV_FILE "/proc/loadavg"
607 char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")];
608 char const *ptr = ldavgbuf;
611 fd = open (LINUX_LDAV_FILE, O_RDONLY);
614 count = read (fd, ldavgbuf, sizeof ldavgbuf - 1);
618 ldavgbuf[count] = '\0';
620 for (elem = 0; elem < nelem; elem++)
626 d = c_strtod (ptr, &endptr);
627 if (ptr == endptr || (d == 0 && errno != 0))
639 # endif /* __linux__ || __CYGWIN__ */
641 # if !defined (LDAV_DONE) && defined (__NetBSD__)
643 # undef LOAD_AVE_TYPE
645 # ifndef NETBSD_LDAV_FILE
646 # define NETBSD_LDAV_FILE "/kern/loadavg"
649 unsigned long int load_ave[3], scale;
653 fp = fopen (NETBSD_LDAV_FILE, "r");
656 count = fscanf (fp, "%lu %lu %lu %lu\n",
657 &load_ave[0], &load_ave[1], &load_ave[2],
663 for (elem = 0; elem < nelem; elem++)
664 loadavg[elem] = (double) load_ave[elem] / (double) scale;
668 # endif /* __NetBSD__ */
670 # if !defined (LDAV_DONE) && defined (NeXT)
672 /* The NeXT code was adapted from iscreen 3.2. */
675 struct processor_set_basic_info info;
676 unsigned int info_count;
678 /* We only know how to get the 1-minute average for this system,
679 so even if the caller asks for more than 1, we only return 1. */
681 if (!getloadavg_initialized)
683 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
684 getloadavg_initialized = true;
687 if (getloadavg_initialized)
689 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
690 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
691 (processor_set_info_t) &info, &info_count)
693 getloadavg_initialized = false;
697 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
701 if (!getloadavg_initialized)
705 # if !defined (LDAV_DONE) && defined (UMAX)
707 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
708 have a /dev/kmem. Information about the workings of the running kernel
709 can be gathered with inq_stats system calls.
710 We only know how to get the 1-minute average for this system. */
712 struct proc_summary proc_sum_data;
713 struct stat_descr proc_info;
715 register unsigned int i, j;
719 register unsigned int c, i;
720 struct cpu_config conf;
721 struct stat_descr desc;
724 desc.sd_subsys = SUBSYS_CPU;
725 desc.sd_type = CPUTYPE_CONFIG;
726 desc.sd_addr = (char *) &conf;
727 desc.sd_size = sizeof conf;
729 if (inq_stats (1, &desc))
733 for (i = 0; i < conf.config_maxclass; ++i)
735 struct class_stats stats;
736 bzero ((char *) &stats, sizeof stats);
738 desc.sd_type = CPUTYPE_CLASS;
740 desc.sd_addr = (char *) &stats;
741 desc.sd_size = sizeof stats;
743 if (inq_stats (1, &desc))
746 c += stats.class_numcpus;
749 samples = cpus < 2 ? 3 : (2 * cpus / 3);
752 proc_info.sd_next = 0;
753 proc_info.sd_subsys = SUBSYS_PROC;
754 proc_info.sd_type = PROCTYPE_SUMMARY;
755 proc_info.sd_addr = (char *) &proc_sum_data;
756 proc_info.sd_size = sizeof (struct proc_summary);
757 proc_info.sd_sizeused = 0;
759 if (inq_stats (1, &proc_info) != 0)
762 load = proc_sum_data.ps_nrunnable;
764 for (i = samples - 1; i > 0; --i)
766 load += proc_sum_data.ps_nrun[j];
767 if (j++ == PS_NRUNSIZE)
772 loadavg[elem++] = load / samples / cpus;
775 # if !defined (LDAV_DONE) && defined (DGUX)
777 /* This call can return -1 for an error, but with good args
778 it's not supposed to fail. The first argument is for no
779 apparent reason of type `long int *'. */
780 dg_sys_info ((long int *) &load_info,
781 DG_SYS_INFO_LOAD_INFO_TYPE,
782 DG_SYS_INFO_LOAD_VERSION_0);
785 loadavg[elem++] = load_info.one_minute;
787 loadavg[elem++] = load_info.five_minute;
789 loadavg[elem++] = load_info.fifteen_minute;
792 # if !defined (LDAV_DONE) && defined (apollo)
794 /* Apollo code from lisch@mentorg.com (Ray Lischner).
796 This system call is not documented. The load average is obtained as
797 three long integers, for the load average over the past minute,
798 five minutes, and fifteen minutes. Each value is a scaled integer,
799 with 16 bits of integer part and 16 bits of fraction part.
801 I'm not sure which operating system first supported this system call,
802 but I know that SR10.2 supports it. */
804 extern void proc1_$get_loadav ();
805 unsigned long load_ave[3];
807 proc1_$get_loadav (load_ave);
810 loadavg[elem++] = load_ave[0] / 65536.0;
812 loadavg[elem++] = load_ave[1] / 65536.0;
814 loadavg[elem++] = load_ave[2] / 65536.0;
817 # if !defined (LDAV_DONE) && defined (OSF_MIPS)
820 struct tbl_loadavg load_ave;
821 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
823 = (load_ave.tl_lscale == 0
824 ? load_ave.tl_avenrun.d[0]
825 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
826 # endif /* OSF_MIPS */
828 # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32))
831 /* A faithful emulation is going to have to be saved for a rainy day. */
832 for ( ; elem < nelem; elem++)
836 # endif /* __MSDOS__ || WINDOWS32 */
838 # if !defined (LDAV_DONE) && defined (OSF_ALPHA)
841 struct tbl_loadavg load_ave;
842 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
843 for (elem = 0; elem < nelem; elem++)
845 = (load_ave.tl_lscale == 0
846 ? load_ave.tl_avenrun.d[elem]
847 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
848 # endif /* OSF_ALPHA */
850 # if ! defined LDAV_DONE && defined __VMS
851 /* VMS specific code -- read from the Load Ave driver. */
853 LOAD_AVE_TYPE load_ave[3];
854 static bool getloadavg_initialized;
863 /* Ensure that there is a channel open to the load ave device. */
864 if (!getloadavg_initialized)
866 /* Attempt to open the channel. */
868 descriptor.dsc$w_length = 18;
869 descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE";
871 $DESCRIPTOR (descriptor, "LAV0:");
873 if (sys$assign (&descriptor, &channel, 0, 0) & 1)
874 getloadavg_initialized = true;
877 /* Read the load average vector. */
878 if (getloadavg_initialized
879 && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0,
880 load_ave, 12, 0, 0, 0, 0) & 1))
882 sys$dassgn (channel);
883 getloadavg_initialized = false;
886 if (!getloadavg_initialized)
888 # endif /* ! defined LDAV_DONE && defined __VMS */
890 # if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS
892 /* UNIX-specific code -- read the average from /dev/kmem. */
894 # define LDAV_PRIVILEGED /* This code requires special installation. */
896 LOAD_AVE_TYPE load_ave[3];
898 /* Get the address of LDAV_SYMBOL. */
902 # if ! defined NLIST_STRUCT || ! defined N_NAME_POINTER
903 strcpy (nl[0].n_name, LDAV_SYMBOL);
904 strcpy (nl[1].n_name, "");
905 # else /* NLIST_STRUCT */
906 # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
907 nl[0].n_un.n_name = LDAV_SYMBOL;
908 nl[1].n_un.n_name = 0;
909 # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
910 nl[0].n_name = LDAV_SYMBOL;
912 # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
913 # endif /* NLIST_STRUCT */
917 # if !(defined (_AIX) && !defined (ps2))
918 nlist (KERNEL_FILE, nl)
920 knlist (nl, 1, sizeof (nl[0]))
923 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
925 # ifdef FIXUP_KERNEL_SYMBOL_ADDR
926 FIXUP_KERNEL_SYMBOL_ADDR (nl);
928 offset = nl[0].n_value;
930 # endif /* !SUNOS_5 */
934 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
936 offset = (long int) ldav_off & 0x7fffffff;
940 /* Make sure we have /dev/kmem open. */
941 if (!getloadavg_initialized)
944 channel = open ("/dev/kmem", O_RDONLY);
947 /* Set the channel to close on exec, so it does not
948 litter any child's descriptor table. */
949 set_cloexec_flag (channel, true);
950 getloadavg_initialized = true;
953 /* We pass 0 for the kernel, corefile, and swapfile names
954 to use the currently running kernel. */
955 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
958 /* nlist the currently running kernel. */
960 offset = nl[0].n_value;
961 getloadavg_initialized = true;
963 # endif /* SUNOS_5 */
966 /* If we can, get the load average values. */
967 if (offset && getloadavg_initialized)
969 /* Try to read the load. */
971 if (lseek (channel, offset, 0) == -1L
972 || read (channel, (char *) load_ave, sizeof (load_ave))
973 != sizeof (load_ave))
976 getloadavg_initialized = false;
979 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
980 != sizeof (load_ave))
983 getloadavg_initialized = false;
985 # endif /* SUNOS_5 */
988 if (offset == 0 || !getloadavg_initialized)
990 # endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */
992 # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
994 loadavg[elem++] = LDAV_CVT (load_ave[0]);
996 loadavg[elem++] = LDAV_CVT (load_ave[1]);
998 loadavg[elem++] = LDAV_CVT (load_ave[2]);
1001 # endif /* !LDAV_DONE && LOAD_AVE_TYPE */
1003 # if !defined LDAV_DONE
1004 /* Set errno to zero to indicate that there was no particular error;
1005 this function just can't work at all on this system. */
1012 #endif /* ! HAVE_GETLOADAVG */
1016 main (int argc, char **argv)
1021 naptime = atoi (argv[1]);
1028 errno = 0; /* Don't be misled if it doesn't set errno. */
1029 loads = getloadavg (avg, 3);
1032 perror ("Error getting load average");
1033 return EXIT_FAILURE;
1036 printf ("1-minute: %f ", avg[0]);
1038 printf ("5-minute: %f ", avg[1]);
1040 printf ("15-minute: %f ", avg[2]);
1049 return EXIT_SUCCESS;