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/*******************************************************************************
* Copyright (c) 2016 École Polytechnique de Montréal
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*******************************************************************************/
package org.eclipse.tracecompass.incubator.internal.virtual.machine.analysis.core.fused.handlers;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
import org.eclipse.tracecompass.incubator.internal.virtual.machine.analysis.core.fused.FusedAttributes;
import org.eclipse.tracecompass.incubator.internal.virtual.machine.analysis.core.model.VirtualMachine;
import org.eclipse.tracecompass.incubator.internal.virtual.machine.analysis.core.virtual.resources.StateValues;
import org.eclipse.tracecompass.statesystem.core.ITmfStateSystemBuilder;
import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect;
import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;
/**
* @author Cédric Biancheri
*/
public class SchedWakeupHandler extends VMKernelEventHandler {
public SchedWakeupHandler(IKernelAnalysisEventLayout layout, FusedVirtualMachineStateProvider sp) {
super(layout, sp);
}
@Override
public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) {
Integer cpu = TmfTraceUtils.resolveIntEventAspectOfClassForEvent(event.getTrace(), TmfCpuAspect.class, event);
if (cpu == null) {
return;
}
FusedVirtualMachineStateProvider sp = getStateProvider();
VirtualMachine host = sp.getCurrentMachine(event);
if (host != null && host.isGuest()) {
Integer physicalCPU = sp.getPhysicalCPU(host, cpu);
if (physicalCPU != null) {
cpu = physicalCPU;
} else {
return;
}
}
String machineHost = event.getTrace().getHostId();
final int tid = ((Long) event.getContent().getField(getLayout().fieldTid()).getValue()).intValue();
final int prio = ((Long) event.getContent().getField(getLayout().fieldPrio()).getValue()).intValue();
String threadAttributeName = FusedVMEventHandlerUtils.buildThreadAttributeName(tid, cpu);
if (threadAttributeName == null) {
return;
}
final int threadNode = ss.getQuarkRelativeAndAdd(FusedVMEventHandlerUtils.getNodeThreads(ss), machineHost, 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.
*/
int quark = ss.getQuarkRelativeAndAdd(threadNode, FusedAttributes.STATUS);
Object value = ss.queryOngoing(quark);
if (!(value instanceof Integer)) {
return;
}
int status = (int) value;
long timestamp = FusedVMEventHandlerUtils.getTimestamp(event);
if (status != StateValues.PROCESS_STATUS_RUN_SYSCALL &&
status != StateValues.PROCESS_STATUS_RUN_USERMODE) {
ss.modifyAttribute(timestamp, StateValues.PROCESS_STATUS_WAIT_FOR_CPU, quark);
}
/*
* When a user changes a threads prio (e.g. with pthread_setschedparam),
* it shows in ftrace with a sched_wakeup.
*/
quark = ss.getQuarkRelativeAndAdd(threadNode, FusedAttributes.PRIO);
ss.modifyAttribute(timestamp, prio, quark);
}
}
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