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.Attributes;
  18 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelAnalysisModule;
  19 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelTidAspect;
  20 import org.eclipse.tracecompass.common.core.NonNullUtils;
  21 import org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.handlers.KernelEventHandlerUtils;
  22 import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem;
  23 import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException;
  24 import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException;
  25 import org.eclipse.tracecompass.statesystem.core.exceptions.TimeRangeException;
  26 import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval;
  27 import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue;
  28 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  29 import org.eclipse.tracecompass.tmf.core.event.aspect.ITmfEventAspect;
  30 import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
  31 import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
  32 import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
  33
  34 /**
  35  * This aspect finds the priority of the thread running from this event using
  36  * the {@link KernelAnalysisModule}.
  37  *
  38  * @author Christian Mansky
  39  * @since 2.0
  40  */
  41 public final class ThreadPriorityAspect implements ITmfEventAspect {
  42
  43     /** The singleton instance */
  44     public static final ThreadPriorityAspect INSTANCE = new ThreadPriorityAspect();
  45
  46     private ThreadPriorityAspect() {
  47     }
  48
  49     @Override
  50     public final String getName() {
  51         return NonNullUtils.nullToEmptyString(Messages.AspectName_Prio);
  52     }
  53
  54     @Override
  55     public final String getHelpText() {
  56         return NonNullUtils.nullToEmptyString(Messages.AspectHelpText_Prio);
  57     }
  58
  59     @Override
  60     public @Nullable Integer resolve(ITmfEvent event) {
  61         final @NonNull ITmfTrace trace = event.getTrace();
  62         KernelAnalysisModule kernelAnalysis = TmfTraceUtils.getAnalysisModuleOfClass(trace, KernelAnalysisModule.class, KernelAnalysisModule.ID);
  63         if (kernelAnalysis == null) {
  64             return null;
  65         }
  66
  67         ITmfStateSystem ss = kernelAnalysis.getStateSystem();
  68         if (ss == null) {
  69             return null;
  70         }
  71
  72         Integer tid = KernelTidAspect.INSTANCE.resolve(event);
  73         if (tid == null) {
  74             return null;
  75         }
  76
  77         final long ts = event.getTimestamp().getValue();
  78         Integer execPrio = null;
  79         try {
  80             Integer cpu = 0;
  81             if (tid == 0) {
  82                 /* Find the CPU this event is run on */
  83                 cpu = TmfTraceUtils.resolveIntEventAspectOfClassForEvent(trace, TmfCpuAspect.class, event);
  84             }
  85             int execPrioQuark = ss.getQuarkAbsolute(Attributes.THREADS, KernelEventHandlerUtils.buildThreadAttributeName(tid, cpu), Attributes.PRIO);
  86             ITmfStateInterval interval = ss.querySingleState(ts, execPrioQuark);
  87             ITmfStateValue prioValue = interval.getStateValue();
  88             /* We know the prio must be an Integer */
  89             execPrio = prioValue.unboxInt();
  90         } catch (AttributeNotFoundException | StateSystemDisposedException | TimeRangeException e) {
  91         }
  92         return execPrio;
  93     }
  94 }