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.NonNull;
  16 import org.eclipse.jdt.annotation.Nullable;
  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.internal.analysis.os.linux.core.kernel.Attributes;
  21 import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem;
  22 import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException;
  23 import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException;
  24 import org.eclipse.tracecompass.statesystem.core.exceptions.TimeRangeException;
  25 import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval;
  26 import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue;
  27 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  28 import org.eclipse.tracecompass.tmf.core.event.aspect.ITmfEventAspect;
  29 import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
  30 import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
  31 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  32
  33 /**
  34  * This aspect finds the priority of the thread running from this event using
  35  * the {@link KernelAnalysisModule}.
  36  *
  37  * @author Christian Mansky
  38  * @since 2.0
  39  */
  40 public final class ThreadPriorityAspect implements ITmfEventAspect {
  41
  42     /** The singleton instance */
  43     public static final ThreadPriorityAspect INSTANCE = new ThreadPriorityAspect();
  44
  45     private ThreadPriorityAspect() {
  46     }
  47
  48     @Override
  49     public final String getName() {
  50         return NonNullUtils.nullToEmptyString(Messages.AspectName_Prio);
  51     }
  52
  53     @Override
  54     public final String getHelpText() {
  55         return NonNullUtils.nullToEmptyString(Messages.AspectHelpText_Prio);
  56     }
  57
  58     @Override
  59     public @Nullable Integer resolve(ITmfEvent event) {
  60         final @NonNull ITmfTrace trace = event.getTrace();
  61         KernelAnalysisModule kernelAnalysis = TmfTraceUtils.getAnalysisModuleOfClass(trace, KernelAnalysisModule.class, KernelAnalysisModule.ID);
  62         if (kernelAnalysis == null) {
  63             return null;
  64         }
  65
  66         ITmfStateSystem ss = kernelAnalysis.getStateSystem();
  67         if (ss == null) {
  68             return null;
  69         }
  70
  71         Integer tid = KernelTidAspect.INSTANCE.resolve(event);
  72         if (tid == null) {
  73             return null;
  74         }
  75
  76         final long ts = event.getTimestamp().getValue();
  77         Integer execPrio = null;
  78         try {
  79             Integer cpu = 0;
  80             if (tid == 0) {
  81                 /* Find the CPU this event is run on */
  82                 cpu = TmfTraceUtils.resolveIntEventAspectOfClassForEvent(trace, TmfCpuAspect.class, event);
  83             }
  84             int execPrioQuark = ss.getQuarkAbsolute(Attributes.THREADS, Attributes.buildThreadAttributeName(tid, cpu), Attributes.PRIO);
  85             ITmfStateInterval interval = ss.querySingleState(ts, execPrioQuark);
  86             ITmfStateValue prioValue = interval.getStateValue();
  87             /* We know the prio must be an Integer */
  88             execPrio = prioValue.unboxInt();
  89         } catch (AttributeNotFoundException | StateSystemDisposedException | TimeRangeException e) {
  90         }
  91         return execPrio;
  92     }
  93 }