| /******************************************************************************* |
| * Copyright (c) 2015 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Matthew Khouzam - Initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.handlers; |
| |
| import java.util.List; |
| |
| import org.eclipse.jdt.annotation.Nullable; |
| import org.eclipse.tracecompass.analysis.os.linux.core.kernel.StateValues; |
| import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout; |
| import org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.Attributes; |
| import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder; |
| import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException; |
| import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue; |
| import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; |
| |
| /** |
| * Soft Irq exit handler |
| */ |
| public class SoftIrqExitHandler extends KernelEventHandler { |
| |
| /** |
| * Constructor |
| * |
| * @param layout |
| * event layout |
| */ |
| public SoftIrqExitHandler(IKernelAnalysisEventLayout layout) { |
| super(layout); |
| } |
| |
| @Override |
| public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { |
| Integer cpu = KernelEventHandlerUtils.getCpu(event); |
| if (cpu == null) { |
| return; |
| } |
| |
| Integer softIrqId = ((Long) event.getContent().getField(getLayout().fieldVec()).getValue()).intValue(); |
| int currentThreadNode = KernelEventHandlerUtils.getCurrentThreadNode(cpu, ss); |
| /* Put this SoftIRQ back to inactive (= -1) in the resource tree */ |
| int quark = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeSoftIRQs(cpu, ss), softIrqId.toString()); |
| long timestamp = KernelEventHandlerUtils.getTimestamp(event); |
| |
| /* Update the aggregate IRQ entry to set it to this CPU */ |
| boolean softIrqRaised = isSoftIrqRaised(ss.queryOngoingState(quark)); |
| ss.modifyAttribute(timestamp, softIrqRaised ? StateValues.SOFT_IRQ_RAISED_VALUE.unboxValue() : TmfStateValue.nullValue().unboxValue(), quark); |
| |
| int aggregateQuark = ss.getQuarkAbsoluteAndAdd(Attributes.SOFT_IRQS, softIrqId.toString()); |
| ITmfStateValue aggregateValue = KernelEventHandlerUtils.getAggregate(ss, Attributes.SOFT_IRQS, softIrqId); |
| ss.modifyAttribute(timestamp, aggregateValue.unboxValue(), aggregateQuark); |
| |
| /* Set the CPU status back to "busy" or "idle" */ |
| KernelEventHandlerUtils.updateCpuStatus(timestamp, cpu, ss); |
| |
| List<Integer> softIrqs = ss.getSubAttributes(ss.getParentAttributeQuark(quark), false); |
| /* Only set status to running and no exit if ALL softirqs are exited. */ |
| for (Integer softIrq : softIrqs) { |
| if (!ss.queryOngoingState(softIrq).isNull()) { |
| return; |
| } |
| } |
| /* Set the previous process back to running */ |
| KernelEventHandlerUtils.setProcessToRunning(timestamp, currentThreadNode, ss); |
| } |
| |
| /** |
| * This checks if the running <stong>bit</strong> is set |
| * |
| * @param state |
| * the state to check |
| * @return true if in a softirq. The softirq may be pre-empted by an irq |
| */ |
| private static boolean isSoftIrqRaised(@Nullable ITmfStateValue state) { |
| return (state != null && |
| !state.isNull() && |
| (state.unboxInt() & StateValues.CPU_STATUS_SOFT_IRQ_RAISED) == StateValues.CPU_STATUS_SOFT_IRQ_RAISED); |
| } |
| |
| } |