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34 #if defined(LIBC_SCCS) && !defined(lint)
36 static char sccsid[] = "@(#)kvm_getloadavg.c 8.1 (Berkeley) 6/4/93";
38 static const char rcsid[] =
41 #endif /* LIBC_SCCS and not lint */
43 #include <sys/param.h>
45 #include <sys/resource.h>
47 #include <sys/sysctl.h>
48 #include <vm/vm_param.h>
56 #include "kvm_private.h"
58 static struct nlist nl[] = {
60 #define X_AVERUNNABLE 0
67 * kvm_getloadavg() -- Get system load averages, from live or dead kernels.
69 * Put `nelem' samples into `loadavg' array.
70 * Return number of samples retrieved, or -1 on error.
73 kvm_getloadavg(kd, loadavg, nelem)
78 struct loadavg loadinfo;
83 return (getloadavg(loadavg, nelem));
85 if (kvm_nlist(kd, nl) != 0) {
86 for (p = nl; p->n_type != 0; ++p);
87 _kvm_err(kd, kd->program,
88 "%s: no such symbol", p->n_name);
92 #define KREAD(kd, addr, obj) \
93 (kvm_read(kd, addr, (char *)(obj), sizeof(*obj)) != sizeof(*obj))
94 if (KREAD(kd, nl[X_AVERUNNABLE].n_value, &loadinfo)) {
95 _kvm_err(kd, kd->program, "can't read averunnable");
100 * Old kernels have fscale separately; if not found assume
101 * running new format.
103 if (!KREAD(kd, nl[X_FSCALE].n_value, &fscale))
104 loadinfo.fscale = fscale;
106 nelem = MIN(nelem, sizeof(loadinfo.ldavg) / sizeof(fixpt_t));
107 for (i = 0; i < nelem; i++)
108 loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale;