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1 | /******************************************************************************* |
2 | * Copyright (c) 2015 Keba AG | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Christian Mansky - Initial implementation | |
11 | *******************************************************************************/ | |
12 | ||
13 | package org.lttng.scope.lttng.kernel.core.event.aspect; | |
14 | ||
15 | import org.eclipse.jdt.annotation.NonNull; | |
16 | import org.eclipse.jdt.annotation.Nullable; | |
17 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; | |
18 | import org.eclipse.tracecompass.tmf.core.event.aspect.ITmfEventAspect; | |
19 | import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect; | |
20 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace; | |
21 | import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils; | |
22 | import org.lttng.scope.common.core.NonNullUtils; | |
23 | import org.lttng.scope.lttng.kernel.core.analysis.os.Attributes; | |
24 | import org.lttng.scope.lttng.kernel.core.analysis.os.KernelAnalysisModule; | |
25 | ||
26 | import ca.polymtl.dorsal.libdelorean.ITmfStateSystem; | |
27 | import ca.polymtl.dorsal.libdelorean.exceptions.AttributeNotFoundException; | |
28 | import ca.polymtl.dorsal.libdelorean.exceptions.StateSystemDisposedException; | |
29 | import ca.polymtl.dorsal.libdelorean.exceptions.TimeRangeException; | |
30 | import ca.polymtl.dorsal.libdelorean.interval.ITmfStateInterval; | |
31 | import ca.polymtl.dorsal.libdelorean.statevalue.ITmfStateValue; | |
32 | ||
33 | /** | |
34 | * This aspect finds the priority of the thread running from this event using | |
35 | * the {@link KernelAnalysisModule}. | |
36 | * | |
37 | * @author Christian Mansky | |
38 | */ | |
39 | public final class ThreadPriorityAspect implements ITmfEventAspect<Integer> { | |
40 | ||
41 | /** The singleton instance */ | |
42 | public static final ThreadPriorityAspect INSTANCE = new ThreadPriorityAspect(); | |
43 | ||
44 | private ThreadPriorityAspect() { | |
45 | } | |
46 | ||
47 | @Override | |
48 | public final String getName() { | |
49 | return NonNullUtils.nullToEmptyString(Messages.ThreadPriorityAspect_Name); | |
50 | } | |
51 | ||
52 | @Override | |
53 | public final String getHelpText() { | |
54 | return NonNullUtils.nullToEmptyString(Messages.ThreadPriorityAspect_HelpText); | |
55 | } | |
56 | ||
57 | @Override | |
58 | public @Nullable Integer resolve(ITmfEvent event) { | |
59 | final @NonNull ITmfTrace trace = event.getTrace(); | |
60 | KernelAnalysisModule kernelAnalysis = TmfTraceUtils.getAnalysisModuleOfClass(trace, KernelAnalysisModule.class, KernelAnalysisModule.ID); | |
61 | if (kernelAnalysis == null) { | |
62 | return null; | |
63 | } | |
64 | ||
65 | ITmfStateSystem ss = kernelAnalysis.getStateSystem(); | |
66 | if (ss == null) { | |
67 | return null; | |
68 | } | |
69 | ||
70 | Integer tid = KernelTidAspect.INSTANCE.resolve(event); | |
71 | if (tid == null) { | |
72 | return null; | |
73 | } | |
74 | ||
75 | final long ts = event.getTimestamp().getValue(); | |
76 | Integer execPrio = null; | |
77 | try { | |
78 | Integer cpu = 0; | |
79 | if (tid == 0) { | |
80 | /* Find the CPU this event is run on */ | |
81 | cpu = TmfTraceUtils.resolveIntEventAspectOfClassForEvent(trace, TmfCpuAspect.class, event); | |
82 | } | |
83 | int execPrioQuark = ss.getQuarkAbsolute(Attributes.THREADS, Attributes.buildThreadAttributeName(tid, cpu), Attributes.PRIO); | |
84 | ITmfStateInterval interval = ss.querySingleState(ts, execPrioQuark); | |
85 | ITmfStateValue prioValue = interval.getStateValue(); | |
86 | /* We know the prio must be an Integer */ | |
87 | execPrio = prioValue.unboxInt(); | |
88 | } catch (AttributeNotFoundException | StateSystemDisposedException | TimeRangeException e) { | |
89 | } | |
90 | return execPrio; | |
91 | } | |
92 | } |