analysis/org.eclipse.tracecompass.analysis.os.linux.core/src/org/eclipse/tracecompass/analysis/os/linux/core/kernelmemoryusage/KernelMemoryAnalysisModule.java

   1 /**********************************************************************
   2  * Copyright (c) 2016 École Polytechnique de Montréal
   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 package org.eclipse.tracecompass.analysis.os.linux.core.kernelmemoryusage;
  10
  11 import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull;
  12
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
  15 import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelTrace;
  16 import org.eclipse.tracecompass.tmf.core.statesystem.ITmfStateProvider;
  17 import org.eclipse.tracecompass.tmf.core.statesystem.TmfStateSystemAnalysisModule;
  18 import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
  19
  20 /**
  21  * This analysis module creates a stateprovider that keeps track of the memory
  22  * allocated and deallocated by the kernel
  23  *
  24  * @author Samuel Gagnon
  25  * @since 2.0
  26  */
  27 public class KernelMemoryAnalysisModule extends TmfStateSystemAnalysisModule {
  28
  29     /**
  30      * Analysis ID, it should match that in the plugin.xml file
  31      */
  32     public static final @NonNull String ID = "org.eclipse.tracecompass.analysis.os.linux.core.kernelmemory"; //$NON-NLS-1$
  33
  34     /**
  35      * Each thread attribute in the tree has an attribute for keeping the lowest memory
  36      * value for that thread during the trace. (Those values can be negative because we
  37      * don't have access to a memory dump before the trace)
  38      */
  39     public static final @NonNull String THREAD_LOWEST_MEMORY_VALUE = "lowestMemory"; //$NON-NLS-1$
  40
  41     @Override
  42     protected @NonNull ITmfStateProvider createStateProvider() {
  43         ITmfTrace trace = checkNotNull(getTrace());
  44         IKernelAnalysisEventLayout layout;
  45
  46         if (trace instanceof IKernelTrace) {
  47             layout = ((IKernelTrace) trace).getKernelEventLayout();
  48         } else {
  49             /* Fall-back to the base LttngEventLayout */
  50             layout = IKernelAnalysisEventLayout.DEFAULT_LAYOUT;
  51         }
  52         return new KernelMemoryStateProvider(trace, layout);
  53     }
  54 }