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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package com.sun.tools.visualvm.modules.tracer.monitor;
import com.sun.tools.visualvm.application.Application;
import com.sun.tools.visualvm.application.jvm.Jvm;
import com.sun.tools.visualvm.application.jvm.MonitoredData;
import com.sun.tools.visualvm.modules.tracer.ItemValueFormatter;
import com.sun.tools.visualvm.modules.tracer.ProbeItemDescriptor;
import com.sun.tools.visualvm.modules.tracer.TracerProbeDescriptor;
import com.sun.tools.visualvm.tools.jmx.JmxModel;
import com.sun.tools.visualvm.tools.jmx.JmxModel.ConnectionState;
import com.sun.tools.visualvm.tools.jmx.JmxModelFactory;
import com.sun.tools.visualvm.tools.jmx.JvmMXBeans;
import com.sun.tools.visualvm.tools.jmx.JvmMXBeansFactory;
import java.lang.management.OperatingSystemMXBean;
import javax.swing.Icon;
/**
*
* @author Jiri Sedlacek
*/
class CpuMonitorProbe extends MonitorProbe {
private static final String NAME = "Cpu & GC";
private static final String DESCR = "Monitors CPU usage and GC activity.";
private static final int POSITION = 10;
private final boolean cpuSupported;
private final boolean gcSupported;
private final int processorsCount;
private long prevUpTime = -1;
private long prevProcessCpuTime = -1;
private long prevProcessGcTime = -1;
CpuMonitorProbe(MonitoredDataResolver resolver, Application application,
Jvm jvm) {
super(2, createItemDescriptors(), resolver);
cpuSupported = jvm.isCpuMonitoringSupported();
gcSupported = jvm.isCollectionTimeSupported();
int pCount = 1;
JmxModel jmxModel = JmxModelFactory.getJmxModelFor(application);
if (jmxModel != null && jmxModel.getConnectionState() == ConnectionState.CONNECTED) {
JvmMXBeans mxbeans = JvmMXBeansFactory.getJvmMXBeans(jmxModel);
if (mxbeans != null) {
OperatingSystemMXBean osbean = mxbeans.getOperatingSystemMXBean();
if (osbean != null) pCount = osbean.getAvailableProcessors();
}
}
processorsCount = pCount;
}
long[] getValues(MonitoredData data) {
long cpuUsage = -1;
long gcUsage = -1;
long upTime = data.getUpTime() * 1000000;
long processCpuTime = cpuSupported ?
data.getProcessCpuTime() / processorsCount : -1;
long processGcTime = gcSupported ?
data.getCollectionTime() * 1000000 / processorsCount : -1;
if (prevUpTime != -1) {
long upTimeDiff = upTime - prevUpTime;
if (cpuSupported && prevProcessCpuTime != -1) {
long processTimeDiff = processCpuTime - prevProcessCpuTime;
cpuUsage = upTimeDiff > 0 ? Math.min((long)(1000 * (float)processTimeDiff /
(float)upTimeDiff), 1000) : 0;
}
if (gcSupported && prevProcessGcTime != -1) {
long processGcTimeDiff = processGcTime - prevProcessGcTime;
gcUsage = upTimeDiff > 0 ? Math.min((long)(1000 * (float)processGcTimeDiff /
(float)upTimeDiff), 1000) : 0;
if (cpuUsage != -1 && cpuUsage < gcUsage) gcUsage = cpuUsage;
}
}
prevUpTime = upTime;
prevProcessCpuTime = processCpuTime;
prevProcessGcTime = processGcTime;
return new long[] {
Math.max(cpuUsage, 0),
Math.max(gcUsage, 0)
};
}
static final TracerProbeDescriptor createDescriptor(Icon icon, boolean available,
Jvm jvm) {
return new TracerProbeDescriptor(NAME, DESCR, icon, POSITION, available &&
jvm.isCpuMonitoringSupported() ||
jvm.isCollectionTimeSupported());
}
private static final ProbeItemDescriptor[] createItemDescriptors() {
return new ProbeItemDescriptor[] {
ProbeItemDescriptor.continuousLineItem("CPU usage",
"Monitors relative CPU usage (%)",
ItemValueFormatter.DEFAULT_PERCENT, 1d, 0, 1000),
ProbeItemDescriptor.continuousLineItem("GC activity",
"Monitors relative GC activity (%)",
ItemValueFormatter.DEFAULT_PERCENT, 1d, 0, 1000)
};
}
}