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, 2005, 2006, 2007, 2008 Free Software
7 NOTE: The canonical source of this file is maintained with gnulib.
8 Bugs can be reported to bug-gnulib@gnu.org.
10 This program is free software: you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* Compile-time symbols that this file uses:
25 HAVE_PSTAT_GETDYNAMIC Define this if your system has the
26 pstat_getdynamic function. I think it
27 is unique to HPUX9. The best way to get the
28 definition is through the AC_FUNC_GETLOADAVG
29 macro that comes with autoconf 2.13 or newer.
30 If that isn't an option, then just put
31 AC_CHECK_FUNCS(pstat_getdynamic) in your
33 HAVE_LIBPERFSTAT Define this if your system has the
34 perfstat_cpu_total function in libperfstat (AIX).
35 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
36 KERNEL_FILE Name of the kernel file to nlist.
37 LDAV_CVT() Scale the load average from the kernel.
39 LDAV_SYMBOL Name of kernel symbol giving load average.
40 LOAD_AVE_TYPE Type of the load average array in the kernel.
41 Must be defined unless one of
42 apollo, DGUX, NeXT, or UMAX is defined;
44 otherwise, no load average is available.
45 HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults
47 NLIST_STRUCT Include nlist.h, not a.out.h, and
48 the nlist n_name element is a pointer,
50 HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'.
51 LINUX_LDAV_FILE [__linux__, __CYGWIN__]: File containing
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 file system mounted.
74 Support from Michael K. Johnson.
75 __CYGWIN__ Cygwin emulates linux /proc/loadavg.
76 __NetBSD__ NetBSD: assumes /kern file system mounted.
78 In addition, to avoid nesting many #ifdefs, we internally set
79 LDAV_DONE to indicate that the load average has been computed.
81 We also #define LDAV_PRIVILEGED if a program will require
82 special installation to be able to call getloadavg. */
84 /* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems
85 with partially-configured source directories. */
87 #ifndef CONFIGURING_GETLOADAVG
98 /* Exclude all the code except the test program at the end
99 if the system has its own `getloadavg' function. */
101 #ifndef HAVE_GETLOADAVG
103 # include <sys/types.h>
105 /* Both the Emacs and non-Emacs sections want this. Some
106 configuration files' definitions for the LOAD_AVE_CVT macro (like
107 sparc.h's) use macros like FSCALE, defined here. */
108 # if defined (unix) || defined (__unix)
109 # include <sys/param.h>
112 # include "c-strtod.h"
113 # include "cloexec.h"
114 # include "intprops.h"
117 /* The existing Emacs configuration files define a macro called
118 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
119 returns the load average multiplied by 100. What we actually want
120 is a macro called LDAV_CVT, which returns the load average as an
123 For backwards compatibility, we'll define LDAV_CVT in terms of
124 LOAD_AVE_CVT, but future machine config files should just define
125 LDAV_CVT directly. */
127 # if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT)
128 # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
131 # if !defined (BSD) && defined (ultrix)
132 /* Ultrix behaves like BSD on Vaxen. */
137 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
138 conflicts with the definition understood in this file, that this
142 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
143 defined to mean that the nlist method should be used, which is not true. */
147 /* Same issues as for NeXT apply to the HURD-based GNU system. */
151 # endif /* __GNU__ */
153 /* Set values that are different from the defaults, which are
154 set a little farther down with #ifndef. */
157 /* Some shorthands. */
159 # if defined (HPUX) && !defined (hpux)
163 # if defined (__hpux) && !defined (hpux)
167 # if defined (__sun) && !defined (sun)
171 # if defined (hp300) && !defined (hpux)
175 # if defined (ultrix) && defined (mips)
179 # if defined (__SVR4) && !defined (SVR4)
183 # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2)
187 # if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
189 # include <sys/mbuf.h>
190 # include <sys/socket.h>
191 # include <net/route.h>
192 # include <sys/table.h>
193 /* Tru64 4.0D's table.h redefines sys */
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
261 # if defined _AIX && ! defined HAVE_LIBPERFSTAT
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
316 # if defined _AIX && !defined HAVE_LIBPERFSTAT
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) && !defined(HAVE_LIBPERFSTAT)))
355 # define LDAV_SYMBOL "avenrun"
360 /* LOAD_AVE_TYPE should only get defined if we're going to use the
362 # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL))
363 # define LOAD_AVE_TYPE double
366 # ifdef LOAD_AVE_TYPE
370 # ifndef NLIST_STRUCT
372 # else /* NLIST_STRUCT */
374 # endif /* NLIST_STRUCT */
382 # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
383 # include <sys/pstat.h>
387 # define KERNEL_FILE "/vmunix"
388 # endif /* KERNEL_FILE */
391 # define LDAV_SYMBOL "_avenrun"
392 # endif /* LDAV_SYMBOL */
393 # endif /* __linux__ */
399 # include <descrip.h>
401 # include <vms/iodef.h>
406 # define LDAV_CVT(n) ((double) (n))
407 # endif /* !LDAV_CVT */
409 # endif /* LOAD_AVE_TYPE */
411 # if defined HAVE_LIBPERFSTAT
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++)
623 double d = c_strtod (ptr, &endptr);
636 # endif /* __linux__ || __CYGWIN__ */
638 # if !defined (LDAV_DONE) && defined (__NetBSD__)
640 # undef LOAD_AVE_TYPE
642 # ifndef NETBSD_LDAV_FILE
643 # define NETBSD_LDAV_FILE "/kern/loadavg"
646 unsigned long int load_ave[3], scale;
650 fp = fopen (NETBSD_LDAV_FILE, "r");
653 count = fscanf (fp, "%lu %lu %lu %lu\n",
654 &load_ave[0], &load_ave[1], &load_ave[2],
660 for (elem = 0; elem < nelem; elem++)
661 loadavg[elem] = (double) load_ave[elem] / (double) scale;
665 # endif /* __NetBSD__ */
667 # if !defined (LDAV_DONE) && defined (NeXT)
669 /* The NeXT code was adapted from iscreen 3.2. */
672 struct processor_set_basic_info info;
673 unsigned int info_count;
675 /* We only know how to get the 1-minute average for this system,
676 so even if the caller asks for more than 1, we only return 1. */
678 if (!getloadavg_initialized)
680 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
681 getloadavg_initialized = true;
684 if (getloadavg_initialized)
686 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
687 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
688 (processor_set_info_t) &info, &info_count)
690 getloadavg_initialized = false;
694 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
698 if (!getloadavg_initialized)
702 # if !defined (LDAV_DONE) && defined (UMAX)
704 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
705 have a /dev/kmem. Information about the workings of the running kernel
706 can be gathered with inq_stats system calls.
707 We only know how to get the 1-minute average for this system. */
709 struct proc_summary proc_sum_data;
710 struct stat_descr proc_info;
712 register unsigned int i, j;
716 register unsigned int c, i;
717 struct cpu_config conf;
718 struct stat_descr desc;
721 desc.sd_subsys = SUBSYS_CPU;
722 desc.sd_type = CPUTYPE_CONFIG;
723 desc.sd_addr = (char *) &conf;
724 desc.sd_size = sizeof conf;
726 if (inq_stats (1, &desc))
730 for (i = 0; i < conf.config_maxclass; ++i)
732 struct class_stats stats;
733 bzero ((char *) &stats, sizeof stats);
735 desc.sd_type = CPUTYPE_CLASS;
737 desc.sd_addr = (char *) &stats;
738 desc.sd_size = sizeof stats;
740 if (inq_stats (1, &desc))
743 c += stats.class_numcpus;
746 samples = cpus < 2 ? 3 : (2 * cpus / 3);
749 proc_info.sd_next = 0;
750 proc_info.sd_subsys = SUBSYS_PROC;
751 proc_info.sd_type = PROCTYPE_SUMMARY;
752 proc_info.sd_addr = (char *) &proc_sum_data;
753 proc_info.sd_size = sizeof (struct proc_summary);
754 proc_info.sd_sizeused = 0;
756 if (inq_stats (1, &proc_info) != 0)
759 load = proc_sum_data.ps_nrunnable;
761 for (i = samples - 1; i > 0; --i)
763 load += proc_sum_data.ps_nrun[j];
764 if (j++ == PS_NRUNSIZE)
769 loadavg[elem++] = load / samples / cpus;
772 # if !defined (LDAV_DONE) && defined (DGUX)
774 /* This call can return -1 for an error, but with good args
775 it's not supposed to fail. The first argument is for no
776 apparent reason of type `long int *'. */
777 dg_sys_info ((long int *) &load_info,
778 DG_SYS_INFO_LOAD_INFO_TYPE,
779 DG_SYS_INFO_LOAD_VERSION_0);
782 loadavg[elem++] = load_info.one_minute;
784 loadavg[elem++] = load_info.five_minute;
786 loadavg[elem++] = load_info.fifteen_minute;
789 # if !defined (LDAV_DONE) && defined (apollo)
791 /* Apollo code from lisch@mentorg.com (Ray Lischner).
793 This system call is not documented. The load average is obtained as
794 three long integers, for the load average over the past minute,
795 five minutes, and fifteen minutes. Each value is a scaled integer,
796 with 16 bits of integer part and 16 bits of fraction part.
798 I'm not sure which operating system first supported this system call,
799 but I know that SR10.2 supports it. */
801 extern void proc1_$get_loadav ();
802 unsigned long load_ave[3];
804 proc1_$get_loadav (load_ave);
807 loadavg[elem++] = load_ave[0] / 65536.0;
809 loadavg[elem++] = load_ave[1] / 65536.0;
811 loadavg[elem++] = load_ave[2] / 65536.0;
814 # if !defined (LDAV_DONE) && defined (OSF_MIPS)
817 struct tbl_loadavg load_ave;
818 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
820 = (load_ave.tl_lscale == 0
821 ? load_ave.tl_avenrun.d[0]
822 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
823 # endif /* OSF_MIPS */
825 # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32))
828 /* A faithful emulation is going to have to be saved for a rainy day. */
829 for ( ; elem < nelem; elem++)
833 # endif /* __MSDOS__ || WINDOWS32 */
835 # if !defined (LDAV_DONE) && defined (OSF_ALPHA)
838 struct tbl_loadavg load_ave;
839 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
840 for (elem = 0; elem < nelem; elem++)
842 = (load_ave.tl_lscale == 0
843 ? load_ave.tl_avenrun.d[elem]
844 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
845 # endif /* OSF_ALPHA */
847 # if ! defined LDAV_DONE && defined __VMS
848 /* VMS specific code -- read from the Load Ave driver. */
850 LOAD_AVE_TYPE load_ave[3];
851 static bool getloadavg_initialized;
860 /* Ensure that there is a channel open to the load ave device. */
861 if (!getloadavg_initialized)
863 /* Attempt to open the channel. */
865 descriptor.dsc$w_length = 18;
866 descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE";
868 $DESCRIPTOR (descriptor, "LAV0:");
870 if (sys$assign (&descriptor, &channel, 0, 0) & 1)
871 getloadavg_initialized = true;
874 /* Read the load average vector. */
875 if (getloadavg_initialized
876 && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0,
877 load_ave, 12, 0, 0, 0, 0) & 1))
879 sys$dassgn (channel);
880 getloadavg_initialized = false;
883 if (!getloadavg_initialized)
885 # endif /* ! defined LDAV_DONE && defined __VMS */
887 # if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS
889 /* UNIX-specific code -- read the average from /dev/kmem. */
891 # define LDAV_PRIVILEGED /* This code requires special installation. */
893 LOAD_AVE_TYPE load_ave[3];
895 /* Get the address of LDAV_SYMBOL. */
899 # ifndef NLIST_STRUCT
900 strcpy (nl[0].n_name, LDAV_SYMBOL);
901 strcpy (nl[1].n_name, "");
902 # else /* NLIST_STRUCT */
903 # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
904 nl[0].n_un.n_name = LDAV_SYMBOL;
905 nl[1].n_un.n_name = 0;
906 # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
907 nl[0].n_name = LDAV_SYMBOL;
909 # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
910 # endif /* NLIST_STRUCT */
914 # if !(defined (_AIX) && !defined (ps2))
915 nlist (KERNEL_FILE, nl)
917 knlist (nl, 1, sizeof (nl[0]))
920 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
922 # ifdef FIXUP_KERNEL_SYMBOL_ADDR
923 FIXUP_KERNEL_SYMBOL_ADDR (nl);
925 offset = nl[0].n_value;
927 # endif /* !SUNOS_5 */
931 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
933 offset = (long int) ldav_off & 0x7fffffff;
937 /* Make sure we have /dev/kmem open. */
938 if (!getloadavg_initialized)
941 channel = open ("/dev/kmem", O_RDONLY);
944 /* Set the channel to close on exec, so it does not
945 litter any child's descriptor table. */
946 set_cloexec_flag (channel, true);
947 getloadavg_initialized = true;
950 /* We pass 0 for the kernel, corefile, and swapfile names
951 to use the currently running kernel. */
952 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
955 /* nlist the currently running kernel. */
957 offset = nl[0].n_value;
958 getloadavg_initialized = true;
960 # endif /* SUNOS_5 */
963 /* If we can, get the load average values. */
964 if (offset && getloadavg_initialized)
966 /* Try to read the load. */
968 if (lseek (channel, offset, 0) == -1L
969 || read (channel, (char *) load_ave, sizeof (load_ave))
970 != sizeof (load_ave))
973 getloadavg_initialized = false;
976 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
977 != sizeof (load_ave))
980 getloadavg_initialized = false;
982 # endif /* SUNOS_5 */
985 if (offset == 0 || !getloadavg_initialized)
987 # endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */
989 # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
991 loadavg[elem++] = LDAV_CVT (load_ave[0]);
993 loadavg[elem++] = LDAV_CVT (load_ave[1]);
995 loadavg[elem++] = LDAV_CVT (load_ave[2]);
998 # endif /* !LDAV_DONE && LOAD_AVE_TYPE */
1000 # if !defined LDAV_DONE
1001 /* Set errno to zero to indicate that there was no particular error;
1002 this function just can't work at all on this system. */
1009 #endif /* ! HAVE_GETLOADAVG */
1013 main (int argc, char **argv)
1018 naptime = atoi (argv[1]);
1025 errno = 0; /* Don't be misled if it doesn't set errno. */
1026 loads = getloadavg (avg, 3);
1029 perror ("Error getting load average");
1030 return EXIT_FAILURE;
1033 printf ("1-minute: %f ", avg[0]);
1035 printf ("5-minute: %f ", avg[1]);
1037 printf ("15-minute: %f ", avg[2]);
1046 return EXIT_SUCCESS;