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34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #if defined(LIBC_SCCS) && !defined(lint)
39 static char sccsid[] = "@(#)kvm_getloadavg.c 8.1 (Berkeley) 6/4/93";
41 #endif /* LIBC_SCCS and not lint */
43 #include <sys/param.h>
45 #include <sys/resource.h>
52 #include "kvm_private.h"
54 static struct nlist nl[] = {
56 #define X_AVERUNNABLE 0
63 * kvm_getloadavg() -- Get system load averages, from live or dead kernels.
65 * Put `nelem' samples into `loadavg' array.
66 * Return number of samples retrieved, or -1 on error.
69 kvm_getloadavg(kd, loadavg, nelem)
74 struct loadavg loadinfo;
79 return (getloadavg(loadavg, nelem));
81 if (kvm_nlist(kd, nl) != 0) {
82 for (p = nl; p->n_type != 0; ++p);
83 _kvm_err(kd, kd->program,
84 "%s: no such symbol", p->n_name);
88 #define KREAD(kd, addr, obj) \
89 (kvm_read(kd, addr, (char *)(obj), sizeof(*obj)) != sizeof(*obj))
90 if (KREAD(kd, nl[X_AVERUNNABLE].n_value, &loadinfo)) {
91 _kvm_err(kd, kd->program, "can't read averunnable");
96 * Old kernels have fscale separately; if not found assume
99 if (!KREAD(kd, nl[X_FSCALE].n_value, &fscale))
100 loadinfo.fscale = fscale;
102 nelem = MIN(nelem, sizeof(loadinfo.ldavg) / sizeof(fixpt_t));
103 for (i = 0; i < nelem; i++)
104 loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale;