lttng/org.lttng.scope.lttng.kernel.core/src/org/lttng/scope/lttng/kernel/core/analysis/os/handlers/internal/SoftIrqRaiseHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015 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  * Contributors:
  10  *    Matthew Khouzam - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.lttng.scope.lttng.kernel.core.analysis.os.handlers.internal;
  14
  15 import org.eclipse.jdt.annotation.Nullable;
  16 import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
  17 import org.lttng.scope.lttng.kernel.core.analysis.os.StateValues;
  18 import org.lttng.scope.lttng.kernel.core.trace.layout.ILttngKernelEventLayout;
  19
  20 import ca.polymtl.dorsal.libdelorean.ITmfStateSystemBuilder;
  21 import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException;
  22 import ca.polymtl.dorsal.libdelorean.statevalue.ITmfStateValue;
  23
  24 /**
  25  * Raise a soft irq event
  26  */
  27 public class SoftIrqRaiseHandler extends KernelEventHandler {
  28
  29     /**
  30      * Constructor
  31      *
  32      * @param layout
  33      *            event layout
  34      */
  35     public SoftIrqRaiseHandler(ILttngKernelEventLayout layout) {
  36         super(layout);
  37     }
  38
  39     @Override
  40     public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException {
  41         Integer softIrqId = ((Long) event.getContent().getField(getLayout().fieldVec()).getValue()).intValue();
  42         Integer cpu = KernelEventHandlerUtils.getCpu(event);
  43         if (cpu == null) {
  44             return;
  45         }
  46         /*
  47          * Mark this SoftIRQ as *raised* in the resource tree.
  48          */
  49         int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeSoftIRQs(cpu, ss), softIrqId.toString());
  50
  51         ITmfStateValue value = (isInSoftirq(ss.queryOngoingState(quark)) ?
  52                 StateValues.SOFT_IRQ_RAISED_RUNNING_VALUE :
  53                 StateValues.SOFT_IRQ_RAISED_VALUE);
  54         ss.modifyAttribute(KernelEventHandlerUtils.getTimestamp(event), value, quark);
  55
  56     }
  57
  58     private static boolean isInSoftirq(@Nullable ITmfStateValue state) {
  59         return (state != null &&
  60                 !state.isNull() &&
  61                 (state.unboxInt() & StateValues.CPU_STATUS_SOFTIRQ) == StateValues.CPU_STATUS_SOFTIRQ);
  62     }
  63 }