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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
* 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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* 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.tools.visualvm.modules.tracer.dtrace;
import com.sun.tools.visualvm.application.Application;
import com.sun.tools.visualvm.modules.tracer.ItemValueFormatter;
import com.sun.tools.visualvm.modules.tracer.ProbeItemDescriptor;
import com.sun.tools.visualvm.modules.tracer.TracerProbe;
import com.sun.tools.visualvm.modules.tracer.TracerProbeDescriptor;
import com.sun.tools.visualvm.modules.tracer.TracerProgressObject;
import com.sun.tools.visualvm.tools.jmx.JmxModel;
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.ThreadMXBean;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.swing.Icon;
import org.openide.util.Exceptions;
import org.opensolaris.os.dtrace.Aggregate;
import org.opensolaris.os.dtrace.Aggregation;
import org.opensolaris.os.dtrace.AggregationRecord;
import org.opensolaris.os.dtrace.Consumer;
import org.opensolaris.os.dtrace.DTraceException;
/**
*
* @author Tomas Hurka
*/
class JVMOverheadProbe extends TracerProbe.SessionAware<Application> {
private static final String NAME = "JVM overhead";
private static final String DESCR = "Monitors JVM overhead.";
private static final int POSITION = 16;
private static final String AGGREG_VALUE = "threads";
private static final int probes = 1;
private final int processorsCount;
private long lastValues[];
private DTracePackage dtrace;
private long lastTime;
private ThreadMXBean threads;
private Set<Long> threadIds;
JVMOverheadProbe(DTracePackage dt) {
super(createItemDescriptors());
processorsCount = getItemsCount();
dtrace = dt;
}
static final TracerProbeDescriptor createDescriptor(Icon icon, boolean available) {
return new TracerProbeDescriptor(NAME, DESCR, icon, POSITION, available);
}
private static final ProbeItemDescriptor[] createItemDescriptors() {
ProbeItemDescriptor[] descs = new ProbeItemDescriptor[probes];
descs[0] = ProbeItemDescriptor.continuousLineItem("JVM overhead",
"Monitors relative JVM overhead (%)",
ItemValueFormatter.DEFAULT_PERCENT, 1d, 0, 1000);
return descs;
}
@Override
protected TracerProgressObject sessionInitializing(Application dataSource, int refresh) {
lastTime = 0;
lastValues = null;
return super.sessionInitializing(dataSource, refresh);
}
@Override
protected void sessionRunning(Application dataSource) {
JmxModel model = JmxModelFactory.getJmxModelFor(dataSource);
JvmMXBeans beans = JvmMXBeansFactory.getJvmMXBeans(model);
threads = beans.getThreadMXBean();
threadIds = new HashSet();
long[] tids = threads.getAllThreadIds();
for (long tid : tids) {
threadIds.add(Long.valueOf(tid));
}
// System.out.println(threadIds);
super.sessionRunning(dataSource);
}
@Override
public long[] getItemValues(long timestamp) {
long time;
long vals[];
long diffs[] = new long[probes];
try {
time = System.currentTimeMillis();
vals = getCurrentValues();
if (lastValues != null) {
long delta = time - lastTime;
for (int i = 0; i < vals.length; i++) {
diffs[i] = (vals[i] - lastValues[i]) / (1000 * delta);
}
} else {
long[] tids = threads.getAllThreadIds();
for (long tid : tids) {
threadIds.add(Long.valueOf(tid));
}
// System.out.println(threadIds);
}
} catch (DTraceException ex) {
Exceptions.printStackTrace(ex);
return diffs;
}
lastTime = time;
lastValues = vals;
return diffs;
}
private long[] getCurrentValues() throws DTraceException {
long vals[] = new long[probes];
Consumer c = dtrace.getConsumer();
Aggregate result = c.getAggregate();
Aggregation agg = result.getAggregation(AGGREG_VALUE);
if (agg != null) {
List<AggregationRecord> records = agg.getRecords();
long time = 0;
for (AggregationRecord record : records) {
Number tid = (Number) record.getTuple().get(0).getValue();
Number val = record.getValue().getValue();
if (!threadIds.contains(Long.valueOf(tid.longValue()))) {
time += val.longValue();
// System.out.println("VM thread id: " + tid.longValue());
}
}
vals[0] = time / processorsCount;
}
return vals;
}
}