| /******************************************************************************* |
| * 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 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; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEventField; |
| |
| /** |
| * Waking/wakeup handler. |
| * |
| * "sched_waking" and "sched_wakeup" tracepoints contain the same fields, and |
| * apply the same state transitions in our model, so they can both use this |
| * handler. |
| */ |
| public class SchedWakeupHandler extends KernelEventHandler { |
| |
| /** |
| * Constructor |
| * @param layout event layout |
| */ |
| public SchedWakeupHandler(IKernelAnalysisEventLayout layout) { |
| super(layout); |
| } |
| |
| @Override |
| public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { |
| Integer cpu = KernelEventHandlerUtils.getCpu(event); |
| ITmfEventField content = event.getContent(); |
| final Integer tid = content.getFieldValue(Integer.class, getLayout().fieldTid()); |
| if (tid == null) { |
| return; |
| } |
| final Integer prio = content.getFieldValue(Integer.class, getLayout().fieldPrio()); |
| Long targetCpu = event.getContent().getFieldValue(Long.class, getLayout().fieldTargetCpu()); |
| |
| String threadAttributeName = Attributes.buildThreadAttributeName(tid, cpu); |
| |
| if (cpu == null || targetCpu == null || threadAttributeName == null) { |
| return; |
| } |
| |
| final int threadNode = ss.getQuarkRelativeAndAdd(KernelEventHandlerUtils.getNodeThreads(ss), threadAttributeName); |
| |
| /* |
| * The process indicated in the event's payload is now ready to run. |
| * Assign it to the "wait for cpu" state, but only if it was not already |
| * running. |
| */ |
| ProcessStatus status = ProcessStatus.getStatusFromStateValue(ss.queryOngoingState(threadNode)); |
| long timestamp = KernelEventHandlerUtils.getTimestamp(event); |
| if (status != ProcessStatus.RUN && status != ProcessStatus.RUN_SYTEMCALL) { |
| ss.modifyAttribute(timestamp, ProcessStatus.WAIT_CPU.getStateValue().unboxValue(), threadNode); |
| } |
| |
| /* Set the thread's target run queue */ |
| int quark = ss.getQuarkRelativeAndAdd(threadNode, Attributes.CURRENT_CPU_RQ); |
| ss.modifyAttribute(timestamp, targetCpu.intValue(), quark); |
| |
| /* |
| * When a user changes a threads prio (e.g. with pthread_setschedparam), |
| * it shows in ftrace with a sched_wakeup. |
| */ |
| if (prio != null) { |
| quark = ss.getQuarkRelativeAndAdd(threadNode, Attributes.PRIO); |
| ss.modifyAttribute(timestamp, prio, quark); |
| } |
| } |
| } |