oshi.hardware.platform.unix.freebsd.FreeBsdGlobalMemory Maven / Gradle / Ivy
/**
* Oshi (https://github.com/dblock/oshi)
*
* Copyright (c) 2010 - 2016 The Oshi Project Team
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Maintainers:
* dblock[at]dblock[dot]org
* widdis[at]gmail[dot]com
* enrico.bianchi[at]gmail[dot]com
*
* Contributors:
* https://github.com/dblock/oshi/graphs/contributors
*/
package oshi.hardware.platform.unix.freebsd;
import oshi.hardware.common.AbstractGlobalMemory;
import oshi.util.ExecutingCommand;
import oshi.util.ParseUtil;
import oshi.util.platform.unix.freebsd.BsdSysctlUtil;
/**
* Memory obtained by /proc/meminfo and sysinfo.totalram
*
* @author alessandro[at]perucchi[dot]org
* @author widdis[at]gmail[dot]com
*/
public class FreeBsdGlobalMemory extends AbstractGlobalMemory {
private static final long serialVersionUID = 1L;
private static final long PAGESIZE = BsdSysctlUtil.sysctl("hw.pagesize", 4096);
/**
* {@inheritDoc}
*/
@Override
protected void updateMeminfo() {
if (this.memTotal == 0L) {
this.memTotal = BsdSysctlUtil.sysctl("hw.physmem", 0L);
}
// get pages of available memory
long inactive = BsdSysctlUtil.sysctl("vm.stats.vm.v_inactive_count", 0L);
long cache = BsdSysctlUtil.sysctl("vm.stats.vm.v_cache_count", 0L);
long free = BsdSysctlUtil.sysctl("vm.stats.vm.v_free_count", 0L);
this.memAvailable = (inactive + cache + free) * PAGESIZE;
}
/**
* {@inheritDoc}
*/
@Override
protected void updateSwap() {
this.swapTotal = BsdSysctlUtil.sysctl("vm.swap_total", 0L);
String swapInfo = ExecutingCommand.getAnswerAt("swapinfo -k", 1);
String[] split = swapInfo.split("\\s+");
if (split.length < 5) {
return;
}
this.swapUsed = ParseUtil.parseLongOrDefault(split[2], 0L) << 10;
}
}