lttng/org.lttng.scope.lttng.kernel.core/src/org/lttng/scope/lttng/kernel/core/analysis/os/handlers/internal/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.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.analysis.os.StateValues;
  14 import org.lttng.scope.lttng.kernel.core.trace.layout.ILttngKernelEventLayout;
  15
  16 import ca.polymtl.dorsal.libdelorean.ITmfStateSystemBuilder;
  17 import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException;
  18 import ca.polymtl.dorsal.libdelorean.statevalue.ITmfStateValue;
  19 import ca.polymtl.dorsal.libdelorean.statevalue.TmfStateValue;
  20
  21 /**
  22  * IPI Entry Handler
  23  *
  24  * @author Matthew Khouzam
  25  */
  26 public class IPIEntryHandler extends KernelEventHandler {
  27
  28     /**
  29      * Constructor
  30      *
  31      * @param layout
  32      *            event layout
  33      */
  34     public IPIEntryHandler(ILttngKernelEventLayout layout) {
  35         super(layout);
  36     }
  37
  38     @Override
  39     public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException {
  40
  41         Integer cpu = KernelEventHandlerUtils.getCpu(event);
  42         if (cpu == null) {
  43             return;
  44         }
  45         Integer irqId = ((Long) event.getContent().getField(getLayout().fieldIPIVector()).getValue()).intValue();
  46
  47         /*
  48          * Mark this IRQ as active in the resource tree. The state value = the
  49          * CPU on which this IRQ is sitting
  50          */
  51         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeIRQs(cpu, ss), irqId.toString());
  52
  53         ITmfStateValue value = TmfStateValue.newValueInt(cpu.intValue());
  54         long timestamp = KernelEventHandlerUtils.getTimestamp(event);
  55         ss.modifyAttribute(timestamp, value, quark);
  56
  57         /* Change the status of the running process to interrupted */
  58         quark = KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss);
  59         value = StateValues.PROCESS_STATUS_INTERRUPTED_VALUE;
  60         ss.modifyAttribute(timestamp, value, quark);
  61
  62         /* Change the status of the CPU to interrupted */
  63         quark = KernelEventHandlerUtils.getCurrentCPUNode(cpu, ss);
  64         value = StateValues.CPU_STATUS_IRQ_VALUE;
  65         ss.modifyAttribute(timestamp, value, quark);
  66     }
  67
  68 }