| /******************************************************************************* |
| * Copyright (c) 2016 EfficiOS Inc., Alexandre Montplaisir |
| * |
| * 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 |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.analysis.os.linux.core.kernel.handlers; |
| |
| import org.eclipse.tracecompass.analysis.os.linux.core.model.ProcessStatus; |
| 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.tmf.core.event.ITmfEvent; |
| |
| /** |
| * Handler for task migration events. Normally moves a (non-running) process |
| * from one run queue to another. |
| * |
| * @author Alexandre Montplaisir |
| */ |
| public class SchedMigrateTaskHandler extends KernelEventHandler { |
| |
| /** |
| * Constructor |
| * |
| * @param layout |
| * The event layout to use |
| */ |
| public SchedMigrateTaskHandler(IKernelAnalysisEventLayout layout) { |
| super(layout); |
| } |
| |
| @Override |
| public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { |
| Long tid = event.getContent().getFieldValue(Long.class, getLayout().fieldTid()); |
| Long destCpu = event.getContent().getFieldValue(Long.class, getLayout().fieldDestCpu()); |
| |
| if (tid == null || destCpu == null) { |
| return; |
| } |
| |
| long t = event.getTimestamp().toNanos(); |
| |
| String threadAttributeName = Attributes.buildThreadAttributeName(tid.intValue(), null); |
| if (threadAttributeName == null) { |
| /* Swapper threads do not get migrated */ |
| return; |
| } |
| int threadNode = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeThreads(ss), threadAttributeName); |
| |
| /* |
| * Put the thread in the "wait for cpu" state. Some older versions of |
| * the kernel/tracers may not have the corresponding sched_waking events |
| * that also does so, so we can set it at the migrate, if applicable. |
| */ |
| ss.modifyAttribute(t, ProcessStatus.WAIT_CPU.getStateValue().unboxValue(), threadNode); |
| |
| /* Update the thread's running queue to the new one indicated by the event */ |
| int quark = ss.getQuarkRelativeAndAdd(threadNode, Attributes.CURRENT_CPU_RQ); |
| ss.modifyAttribute(t, destCpu.intValue(), quark); |
| } |
| |
| } |