analysis/org.eclipse.tracecompass.analysis.os.linux.core/src/org/eclipse/tracecompass/internal/analysis/os/linux/core/kernel/handlers/IPIEntryHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2016 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *******************************************************************************/
   9
  10 package org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.handlers;
  11
  12 import org.eclipse.tracecompass.analysis.os.linux.core.kernel.StateValues;
  13 import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
  14 import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder;
  15 import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException;
  16 import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue;
  17 import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue;
  18 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  19
  20 /**
  21  * IPI Entry Handler
  22  *
  23  * @author Matthew Khouzam
  24  */
  25 public class IPIEntryHandler extends KernelEventHandler {
  26
  27     /**
  28      * Constructor
  29      *
  30      * @param layout
  31      *            event layout
  32      */
  33     public IPIEntryHandler(IKernelAnalysisEventLayout layout) {
  34         super(layout);
  35     }
  36
  37     @Override
  38     public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException {
  39
  40         Integer cpu = KernelEventHandlerUtils.getCpu(event);
  41         if (cpu == null) {
  42             return;
  43         }
  44         Integer irqId = ((Long) event.getContent().getField(getLayout().fieldIPIVector()).getValue()).intValue();
  45
  46         /*
  47          * Mark this IRQ as active in the resource tree. The state value = the
  48          * CPU on which this IRQ is sitting
  49          */
  50         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeIRQs(cpu, ss), irqId.toString());
  51
  52         ITmfStateValue value = TmfStateValue.newValueInt(cpu.intValue());
  53         long timestamp = KernelEventHandlerUtils.getTimestamp(event);
  54         ss.modifyAttribute(timestamp, value, quark);
  55
  56         /* Change the status of the running process to interrupted */
  57         quark = KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss);
  58         value = StateValues.PROCESS_STATUS_INTERRUPTED_VALUE;
  59         ss.modifyAttribute(timestamp, value, quark);
  60
  61         /* Change the status of the CPU to interrupted */
  62         quark = KernelEventHandlerUtils.getCurrentCPUNode(cpu, ss);
  63         value = StateValues.CPU_STATUS_IRQ_VALUE;
  64         ss.modifyAttribute(timestamp, value, quark);
  65     }
  66
  67 }