/
ModelListener.java
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/
ModelListener.java
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/*******************************************************************************
* Copyright (c) 2016 École Polytechnique de Montréal
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License 2.0 which
* accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.tracecompass.internal.analysis.callstack.core.model;
import java.lang.ref.WeakReference;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.WeakHashMap;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelAnalysisModule;
import org.eclipse.tracecompass.analysis.os.linux.core.tid.TidAnalysisModule;
import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem;
import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException;
import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval;
import org.eclipse.tracecompass.tmf.core.analysis.IAnalysisModule;
import org.eclipse.tracecompass.tmf.core.analysis.ITmfNewAnalysisModuleListener;
import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
/**
* Listener for the {@link CompositeHostModel} that waits for new modules and
* adds them to the appropriate model concept.
*
* @author Geneviève Bastien
*/
public class ModelListener implements ITmfNewAnalysisModuleListener {
private static final Comparator<ITmfStateInterval> INTERVAL_COMPARATOR = new Comparator<ITmfStateInterval>() {
@Override
public int compare(@Nullable ITmfStateInterval o1, @Nullable ITmfStateInterval o2) {
if (o1 == null) {
return 1;
}
if (o2 == null) {
return -1;
}
return o1.getEndTime() < o2.getEndTime() ? -1 : o1.getEndTime() == o2.getEndTime() ? 0 : 1;
}
};
/**
* Interface to be implemented by module wrapper to return the module.
* Package-private, as only the composite model should need this
*/
interface IModuleWrapper {
Optional<IAnalysisModule> getModule();
}
private Map<TidAnalysisModule, TidAnalysisWrapper> fTidModules = new WeakHashMap<>();
@Override
public void moduleCreated(@Nullable IAnalysisModule module) {
if (module instanceof ICpuTimeProvider) {
ICpuTimeProvider provider = (ICpuTimeProvider) module;
for (String hostId : provider.getHostIds()) {
IHostModel model = ModelManager.getModelFor(hostId);
if (model instanceof CompositeHostModel) {
((CompositeHostModel) model).setCpuTimeProvider(provider);
}
}
}
if (module instanceof IThreadOnCpuProvider) {
IThreadOnCpuProvider provider = (IThreadOnCpuProvider) module;
for (String hostId : provider.getHostIds()) {
IHostModel model = ModelManager.getModelFor(hostId);
if (model instanceof CompositeHostModel) {
((CompositeHostModel) model).setThreadOnCpuProvider(provider);
}
}
}
if (module instanceof TidAnalysisModule) {
TidAnalysisModule provider = (TidAnalysisModule) module;
ITmfTrace trace = provider.getTrace();
if (trace != null) {
IHostModel model = ModelManager.getModelFor(trace.getHostId());
TidAnalysisWrapper tidAnalysisWrapper = new TidAnalysisWrapper(provider, trace.getHostId());
fTidModules.put(provider, tidAnalysisWrapper);
((CompositeHostModel) model).setThreadOnCpuProvider(trace, tidAnalysisWrapper);
((CompositeHostModel) model).setCpuTimeProvider(trace, tidAnalysisWrapper);
}
}
if (module instanceof ISamplingDataProvider) {
ISamplingDataProvider provider = (ISamplingDataProvider) module;
for (String hostId : provider.getHostIds()) {
IHostModel model = ModelManager.getModelFor(hostId);
if (model instanceof CompositeHostModel) {
((CompositeHostModel) model).setSamplingDataProvider(provider);
}
}
}
if (module instanceof KernelAnalysisModule) {
KernelAnalysisModule provider = (KernelAnalysisModule) module;
ITmfTrace trace = provider.getTrace();
if (trace != null) {
IHostModel model = ModelManager.getModelFor(trace.getHostId());
((CompositeHostModel) model).setKernelModule(trace, provider);
}
}
}
private static class TidAnalysisWrapper implements IThreadOnCpuProvider, ICpuTimeProvider, IModuleWrapper {
private final WeakReference<@Nullable TidAnalysisModule> fModule;
private final Collection<String> fHostIds;
public TidAnalysisWrapper(TidAnalysisModule module, String hostId) {
fHostIds = Collections.singleton(hostId);
fModule = new WeakReference<>(module);
}
@Override
public @Nullable Integer getThreadOnCpuAtTime(int cpu, long time, boolean block) {
TidAnalysisModule module = fModule.get();
if (module == null) {
return null;
}
// Wait for the module to be queryable if blocking is requested
while (block && !module.isQueryable(time)) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// just get out of the loop
break;
}
}
return module.getThreadOnCpuAtTime(cpu, time);
}
@Override
public @NonNull Collection<String> getHostIds() {
return fHostIds;
}
@Override
public long getCpuTime(int tid, long start, long realEnd) {
TidAnalysisModule module = fModule.get();
if (module == null) {
return IHostModel.TIME_UNKNOWN;
}
ITmfStateSystem stateSystem = module.getStateSystem();
if (stateSystem == null) {
return IHostModel.TIME_UNKNOWN;
}
long cpuTime = 0;
if (tid < 0) {
return IHostModel.TIME_UNKNOWN;
}
long time = Long.max(start, stateSystem.getStartTime());
final long end = Math.min(realEnd, stateSystem.getCurrentEndTime());
boolean found = false;
try {
while (time < end) {
found = false;
// check if the process was on a CPU at the time
List<ITmfStateInterval> states = stateSystem.queryFullState(time);
for (ITmfStateInterval interval : states) {
if (interval.getStateValue().unboxLong() == tid) {
long endTime = Math.min(end, interval.getEndTime() + 1);
cpuTime += endTime - time;
time = endTime + 1;
found = true;
}
}
if (!found) {
Collections.sort(states, INTERVAL_COMPARATOR);
while (time < end && !found) {
ITmfStateInterval interval = states.remove(0);
time = interval.getEndTime() + 1;
if (time > end) {
continue;
}
ITmfStateInterval next = stateSystem.querySingleState(time, interval.getAttribute());
if (next.getStateValue().unboxLong() == tid) {
long endTime = Math.min(end, next.getEndTime() + 1);
cpuTime += endTime - time;
time = endTime + 1;
found = true;
} else {
int pos = Collections.binarySearch(states, next, INTERVAL_COMPARATOR);
if (pos < 0) {
states.add(-pos - 1, next);
} else {
states.add(interval);
}
}
}
}
}
} catch (StateSystemDisposedException e) {
return IHostModel.TIME_UNKNOWN;
}
return cpuTime;
}
@SuppressWarnings("null")
@Override
public Optional<IAnalysisModule> getModule() {
TidAnalysisModule module = fModule.get();
return module == null ? Optional.empty() : Optional.of(module);
}
}
}