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Current Path: /usr/src/lib/libkvm

📁 ..
📄 Makefile(1.16 KB)
📄 Makefile.depend(272 B)
📄 kvm.3(4.95 KB)
📄 kvm.c(12.12 KB)
📄 kvm.h(4.11 KB)
📄 kvm_aarch64.h(2.57 KB)
📄 kvm_amd64.c(8.44 KB)
📄 kvm_amd64.h(3.66 KB)
📄 kvm_arm.c(6.93 KB)
📄 kvm_arm.h(5.18 KB)
📄 kvm_cptime.c(3.79 KB)
📄 kvm_getcptime.3(2.55 KB)
📄 kvm_geterr.3(2.97 KB)
📄 kvm_getloadavg.3(2.43 KB)
📄 kvm_getloadavg.c(3.22 KB)
📄 kvm_getpcpu.3(4.61 KB)
📄 kvm_getprocs.3(5.08 KB)
📄 kvm_getswapinfo.3(3.34 KB)
📄 kvm_getswapinfo.c(6.94 KB)
📄 kvm_i386.c(10.36 KB)
📄 kvm_i386.h(3.15 KB)
📄 kvm_kerndisp.3(2.15 KB)
📄 kvm_minidump_aarch64.c(7.93 KB)
📄 kvm_minidump_amd64.c(11.77 KB)
📄 kvm_minidump_arm.c(7.74 KB)
📄 kvm_minidump_i386.c(8.65 KB)
📄 kvm_minidump_mips.c(9.58 KB)
📄 kvm_minidump_powerpc64.c(6.37 KB)
📄 kvm_minidump_powerpc64_hpt.c(16.44 KB)
📄 kvm_minidump_riscv.c(7.84 KB)
📄 kvm_mips.h(4.34 KB)
📄 kvm_native.3(2.12 KB)
📄 kvm_nlist.3(3.6 KB)
📄 kvm_open.3(6.68 KB)
📄 kvm_pcpu.c(8.93 KB)
📄 kvm_powerpc.c(6.02 KB)
📄 kvm_powerpc64.c(6.84 KB)
📄 kvm_powerpc64.h(2.52 KB)
📄 kvm_private.c(21.63 KB)
📄 kvm_private.h(6.92 KB)
📄 kvm_proc.c(20.6 KB)
📄 kvm_read.3(3.27 KB)
📄 kvm_riscv.h(3.56 KB)
📄 kvm_vnet.c(6.56 KB)
📁 tests

Editing: kvm_getloadavg.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
__SCCSID("@(#)kvm_getloadavg.c	8.1 (Berkeley) 6/4/93");

#include <sys/param.h>
#include <sys/time.h>
#include <sys/resource.h>

#include <stdlib.h>
#include <limits.h>
#include <nlist.h>
#include <kvm.h>

#include "kvm_private.h"

static struct nlist nl[] = {
	{ .n_name = "_averunnable" },
#define	X_AVERUNNABLE	0
	{ .n_name = "_fscale" },
#define	X_FSCALE	1
	{ .n_name = "" },
};

/*
 * kvm_getloadavg() -- Get system load averages, from live or dead kernels.
 *
 * Put `nelem' samples into `loadavg' array.
 * Return number of samples retrieved, or -1 on error.
 */
int
kvm_getloadavg(kvm_t *kd, double loadavg[], int nelem)
{
	struct loadavg loadinfo;
	struct nlist *p;
	int fscale, i;

if (ISALIVE(kd))
		return (getloadavg(loadavg, nelem));

if (!kd->arch->ka_native(kd)) {
		_kvm_err(kd, kd->program,
		    "cannot read loadavg from non-native core");
		return (-1);
	}

if (kvm_nlist(kd, nl) != 0) {
		for (p = nl; p->n_type != 0; ++p);
		_kvm_err(kd, kd->program,
		    "%s: no such symbol", p->n_name);
		return (-1);
	}

#define KREAD(kd, addr, obj) \
	(kvm_read(kd, addr, (char *)(obj), sizeof(*obj)) != sizeof(*obj))
	if (KREAD(kd, nl[X_AVERUNNABLE].n_value, &loadinfo)) {
		_kvm_err(kd, kd->program, "can't read averunnable");
		return (-1);
	}

/*
	 * Old kernels have fscale separately; if not found assume
	 * running new format.
	 */
	if (!KREAD(kd, nl[X_FSCALE].n_value, &fscale))
		loadinfo.fscale = fscale;

nelem = MIN(nelem, (int)(sizeof(loadinfo.ldavg) / sizeof(fixpt_t)));
	for (i = 0; i < nelem; i++)
		loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale;
	return (nelem);
}

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Editing: kvm_getloadavg.c

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