| /******************************************************************************* |
| * 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 static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull; |
| |
| import org.eclipse.tracecompass.analysis.os.linux.core.kernel.StateValues; |
| 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.statesystem.core.statevalue.ITmfStateValue; |
| import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEventField; |
| |
| /** |
| * Scheduler switch event handler |
| */ |
| public class SchedSwitchHandler extends KernelEventHandler { |
| |
| /** |
| * Constructor |
| * |
| * @param layout |
| * event layout |
| */ |
| public SchedSwitchHandler(IKernelAnalysisEventLayout layout) { |
| super(layout); |
| } |
| |
| @Override |
| public void handleEvent(ITmfStateSystemBuilder ss, ITmfEvent event) throws AttributeNotFoundException { |
| Integer cpu = KernelEventHandlerUtils.getCpu(event); |
| if (cpu == null) { |
| return; |
| } |
| |
| ITmfEventField content = event.getContent(); |
| String prevProcessName = checkNotNull((String) content.getField(getLayout().fieldPrevComm()).getValue()); |
| Integer prevTid = content.getFieldValue(Integer.class, getLayout().fieldPrevTid()); |
| Long prevState = content.getFieldValue(Long.class, getLayout().fieldPrevState()); |
| Integer prevPrio = content.getFieldValue(Integer.class, getLayout().fieldPrevPrio()); |
| String nextProcessName = content.getFieldValue(String.class, getLayout().fieldNextComm()); |
| Integer nextTid = content.getFieldValue(Integer.class, getLayout().fieldNextTid()); |
| Integer nextPrio = content.getFieldValue(Integer.class, getLayout().fieldNextPrio()); |
| |
| /* Will never return null since "cpu" is null checked */ |
| if (prevTid == null || prevState == null || nextTid == null) { |
| return; |
| } |
| String formerThreadAttributeName = Attributes.buildThreadAttributeName(prevTid, cpu); |
| String currenThreadAttributeName = Attributes.buildThreadAttributeName(nextTid, cpu); |
| |
| int nodeThreads = KernelEventHandlerUtils.getNodeThreads(ss); |
| int formerThreadNode = ss.getQuarkRelativeAndAdd(nodeThreads, formerThreadAttributeName); |
| int newCurrentThreadNode = ss.getQuarkRelativeAndAdd(nodeThreads, currenThreadAttributeName); |
| |
| long timestamp = KernelEventHandlerUtils.getTimestamp(event); |
| /* |
| * Set the status of the process that got scheduled out. This will also |
| * set it's current CPU run queue accordingly. |
| */ |
| setOldProcessStatus(ss, prevState, formerThreadNode, cpu, timestamp); |
| |
| /* Set the status of the new scheduled process */ |
| KernelEventHandlerUtils.setProcessToRunning(timestamp, newCurrentThreadNode, ss); |
| |
| /* |
| * Set the current CPU run queue of the new process. Should be already |
| * set if we've seen the previous sched_wakeup, but doesn't hurt to set |
| * it here too. |
| */ |
| int quark = ss.getQuarkRelativeAndAdd(newCurrentThreadNode, Attributes.CURRENT_CPU_RQ); |
| ss.modifyAttribute(timestamp, cpu, quark); |
| |
| /* Set the exec name of the former process */ |
| setProcessExecName(ss, prevProcessName, formerThreadNode, timestamp); |
| |
| /* Set the exec name of the new process */ |
| if (nextProcessName != null) { |
| setProcessExecName(ss, nextProcessName, newCurrentThreadNode, timestamp); |
| } |
| |
| /* Set the current prio for the former process */ |
| if (prevPrio != null) { |
| setProcessPrio(ss, prevPrio, formerThreadNode, timestamp); |
| } |
| |
| /* Set the current prio for the new process */ |
| if (nextPrio != null) { |
| setProcessPrio(ss, nextPrio, newCurrentThreadNode, timestamp); |
| } |
| |
| /* Set the current scheduled process on the relevant CPU */ |
| int currentCPUNode = KernelEventHandlerUtils.getCurrentCPUNode(cpu, ss); |
| setCpuProcess(ss, nextTid, timestamp, currentCPUNode); |
| |
| /* Set the status of the CPU itself */ |
| setCpuStatus(ss, nextTid, newCurrentThreadNode, timestamp, currentCPUNode, cpu); |
| } |
| |
| private static void setOldProcessStatus(ITmfStateSystemBuilder ss, Long prevState, Integer formerThreadNode, int cpu, long timestamp) { |
| ITmfStateValue value = ProcessStatus.getStatusFromKernelState(prevState).getStateValue(); |
| |
| ss.modifyAttribute(timestamp, value.unboxValue(), formerThreadNode); |
| |
| boolean staysOnRunQueue = ProcessStatus.WAIT_CPU.getStateValue().equals(value); |
| int quark = ss.getQuarkRelativeAndAdd(formerThreadNode, Attributes.CURRENT_CPU_RQ); |
| if (staysOnRunQueue) { |
| /* |
| * Set the thread's run queue. This will often be redundant with |
| * previous events, but it may be the first time we see the |
| * information too. |
| */ |
| value = TmfStateValue.newValueInt(cpu); |
| } else { |
| value = TmfStateValue.nullValue(); |
| } |
| ss.modifyAttribute(timestamp, value.unboxValue(), quark); |
| } |
| |
| private static void setCpuStatus(ITmfStateSystemBuilder ss, Integer nextTid, Integer newCurrentThreadNode, long timestamp, int currentCPUNode, int cpu) { |
| if (nextTid > 0) { |
| /* Check if the entering process is in kernel or user mode */ |
| int quark = ss.getQuarkRelativeAndAdd(newCurrentThreadNode, Attributes.SYSTEM_CALL); |
| ITmfStateValue value; |
| ITmfStateValue queryOngoingState = ss.queryOngoingState(quark); |
| if (queryOngoingState.isNull()) { |
| value = StateValues.CPU_STATUS_RUN_USERMODE_VALUE; |
| } else { |
| value = StateValues.CPU_STATUS_RUN_SYSCALL_VALUE; |
| } |
| ss.modifyAttribute(timestamp, value.unboxValue(), currentCPUNode); |
| } else { |
| KernelEventHandlerUtils.updateCpuStatus(timestamp, cpu, ss); |
| } |
| } |
| |
| private static void setCpuProcess(ITmfStateSystemBuilder ss, Integer nextTid, long timestamp, int currentCPUNode) { |
| int quark; |
| quark = ss.getQuarkRelativeAndAdd(currentCPUNode, Attributes.CURRENT_THREAD); |
| ss.modifyAttribute(timestamp, nextTid, quark); |
| } |
| |
| private static void setProcessPrio(ITmfStateSystemBuilder ss, Integer prio, Integer threadNode, long timestamp) { |
| int quark; |
| quark = ss.getQuarkRelativeAndAdd(threadNode, Attributes.PRIO); |
| ss.modifyAttribute(timestamp, prio, quark); |
| } |
| |
| private static void setProcessExecName(ITmfStateSystemBuilder ss, String processName, Integer threadNode, long timestamp) { |
| int quark; |
| quark = ss.getQuarkRelativeAndAdd(threadNode, Attributes.EXEC_NAME); |
| ss.modifyAttribute(timestamp, processName, quark); |
| } |
| |
| } |