lttng/org.lttng.scope.lttng.kernel.core/src/org/lttng/scope/lttng/kernel/core/analysis/os/handlers/internal/IPIExitHandler.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.lttng.scope.lttng.kernel.core.analysis.os.handlers.internal;
  11
  12 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  13 import org.lttng.scope.lttng.kernel.core.trace.layout.ILttngKernelEventLayout;
  14
  15 import ca.polymtl.dorsal.libdelorean.ITmfStateSystemBuilder;
  16 import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException;
  17 import ca.polymtl.dorsal.libdelorean.statevalue.TmfStateValue;
  18
  19 /**
  20  * IPI Exit Handler
  21  *
  22  * @author Matthew Khouzam
  23  */
  24 public class IPIExitHandler extends KernelEventHandler {
  25
  26     /**
  27      * Constructor
  28      *
  29      * @param layout
  30      *            event layout
  31      */
  32     public IPIExitHandler(ILttngKernelEventLayout layout) {
  33         super(layout);
  34     }
  35
  36     @Override
  37     public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException {
  38         Integer cpu = KernelEventHandlerUtils.getCpu(event);
  39         if (cpu == null) {
  40             return;
  41         }
  42         int currentThreadNode = KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss);
  43         Integer irqId = ((Long) event.getContent().getField(getLayout().fieldIPIVector()).getValue()).intValue();
  44         /* Put this IRQ back to inactive in the resource tree */
  45         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeIRQs(cpu, ss), irqId.toString());
  46         TmfStateValue value = TmfStateValue.nullValue();
  47         long timestamp = KernelEventHandlerUtils.getTimestamp(event);
  48         ss.modifyAttribute(timestamp, value, quark);
  49
  50         /* Set the previous process back to running */
  51         KernelEventHandlerUtils.setProcessToRunning(timestamp, currentThreadNode, ss);
  52
  53         /* Set the CPU status back to running or "idle" */
  54         KernelEventHandlerUtils.cpuExitInterrupt(timestamp, cpu, ss);
  55     }
  56 }