analysis/org.eclipse.tracecompass.analysis.os.linux.core/src/org/eclipse/tracecompass/analysis/os/linux/core/event/aspect/ThreadPriorityAspect.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015 Keba AG
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Christian Mansky - Initial implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.analysis.os.linux.core.event.aspect;
  14
  15 import org.eclipse.jdt.annotation.Nullable;
  16 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.Attributes;
  17 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelAnalysisModule;
  18 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelTidAspect;
  19 import org.eclipse.tracecompass.common.core.NonNullUtils;
  20 import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem;
  21 import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException;
  22 import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException;
  23 import org.eclipse.tracecompass.statesystem.core.exceptions.TimeRangeException;
  24 import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval;
  25 import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue;
  26 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  27 import org.eclipse.tracecompass.tmf.core.event.aspect.ITmfEventAspect;
  28 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  29
  30 /**
  31  * This aspect finds the priority of the thread running from this event using
  32  * the {@link KernelAnalysisModule}.
  33  *
  34  * @author Christian Mansky
  35  * @since 2.0
  36  */
  37 public final class ThreadPriorityAspect implements ITmfEventAspect {
  38
  39     /** The singleton instance */
  40     public static final ThreadPriorityAspect INSTANCE = new ThreadPriorityAspect();
  41
  42     private ThreadPriorityAspect() {
  43     }
  44
  45     @Override
  46     public final String getName() {
  47         return NonNullUtils.nullToEmptyString(Messages.AspectName_Prio);
  48     }
  49
  50     @Override
  51     public final String getHelpText() {
  52         return NonNullUtils.nullToEmptyString(Messages.AspectHelpText_Prio);
  53     }
  54
  55     @Override
  56     public @Nullable Integer resolve(ITmfEvent event) {
  57         KernelAnalysisModule kernelAnalysis = TmfTraceUtils.getAnalysisModuleOfClass(event.getTrace(), KernelAnalysisModule.class, KernelAnalysisModule.ID);
  58         if (kernelAnalysis == null) {
  59             return null;
  60         }
  61
  62         ITmfStateSystem ss = kernelAnalysis.getStateSystem();
  63         if (ss == null) {
  64             return null;
  65         }
  66
  67         Integer tid = KernelTidAspect.INSTANCE.resolve(event);
  68         if (tid == null) {
  69             return null;
  70         }
  71
  72         final long ts = event.getTimestamp().getValue();
  73         Integer execPrio = null;
  74         try {
  75             int execPrioQuark = ss.getQuarkAbsolute(Attributes.THREADS, tid.toString(), Attributes.PRIO);
  76             ITmfStateInterval interval = ss.querySingleState(ts, execPrioQuark);
  77             ITmfStateValue prioValue = interval.getStateValue();
  78             /* We know the prio must be an Integer */
  79             execPrio = prioValue.unboxInt();
  80         } catch (AttributeNotFoundException | StateSystemDisposedException | TimeRangeException e) {
  81         }
  82         return execPrio;
  83     }
  84 }