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1 | /******************************************************************************* |
2 | * Copyright (c) 2014 École Polytechnique de Montréal | |
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 | * Mohamad Gebai - Initial API and implementation | |
11 | * Geneviève Bastien - Initial API and implementation | |
12 | *******************************************************************************/ | |
13 | ||
14 | package org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.vm.module; | |
15 | ||
16 | import java.util.Comparator; | |
17 | import java.util.HashSet; | |
18 | import java.util.Set; | |
19 | ||
20 | import org.eclipse.core.runtime.IProgressMonitor; | |
21 | import org.eclipse.jdt.annotation.NonNull; | |
22 | import org.eclipse.jdt.annotation.Nullable; | |
23 | import org.eclipse.tracecompass.common.core.NonNullUtils; | |
24 | import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.vm.VcpuStateValues; | |
25 | import org.eclipse.tracecompass.internal.lttng2.kernel.core.analysis.vm.VmAttributes; | |
26 | import org.eclipse.tracecompass.lttng2.kernel.core.analysis.kernel.LttngKernelAnalysis; | |
27 | import org.eclipse.tracecompass.lttng2.kernel.core.analysis.kernel.LttngKernelThreadInformationProvider; | |
28 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem; | |
29 | import org.eclipse.tracecompass.statesystem.core.StateSystemUtils; | |
30 | import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException; | |
31 | import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException; | |
32 | import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval; | |
33 | import org.eclipse.tracecompass.statesystem.core.interval.TmfStateInterval; | |
34 | import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue; | |
35 | import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue; | |
36 | import org.eclipse.tracecompass.tmf.core.analysis.IAnalysisModule; | |
37 | import org.eclipse.tracecompass.tmf.core.statesystem.ITmfStateProvider; | |
38 | import org.eclipse.tracecompass.tmf.core.statesystem.TmfStateSystemAnalysisModule; | |
39 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace; | |
40 | import org.eclipse.tracecompass.tmf.core.trace.TmfTraceManager; | |
41 | import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils; | |
42 | import org.eclipse.tracecompass.tmf.core.trace.experiment.TmfExperiment; | |
43 | import org.eclipse.tracecompass.tmf.core.trace.experiment.TmfExperimentUtils; | |
44 | ||
45 | import com.google.common.collect.ImmutableSet; | |
46 | import com.google.common.collect.Multimap; | |
47 | import com.google.common.collect.TreeMultimap; | |
48 | ||
49 | /** | |
50 | * Module for the virtual machine CPU analysis. It tracks the status of the | |
51 | * virtual CPUs for each guest of the experiment. | |
52 | * | |
53 | * @author Mohamad Gebai | |
54 | * @author Geneviève Bastien | |
55 | */ | |
56 | public class VirtualMachineCpuAnalysis extends TmfStateSystemAnalysisModule { | |
57 | ||
58 | // TODO: Update with event layout when requirements are back */ | |
59 | static final Set<String> REQUIRED_EVENTS = NonNullUtils.checkNotNull(ImmutableSet.<String> of( | |
60 | // LttngStrings.SCHED_SWITCH | |
61 | )); | |
62 | ||
63 | /* State value for a preempted virtual CPU */ | |
64 | private static final ITmfStateValue VCPU_PREEMPT_VALUE = TmfStateValue.newValueInt(VcpuStateValues.VCPU_PREEMPT); | |
65 | ||
66 | /** | |
67 | * Constructor | |
68 | */ | |
69 | public VirtualMachineCpuAnalysis() { | |
70 | super(); | |
71 | } | |
72 | ||
73 | @Override | |
74 | protected ITmfStateProvider createStateProvider() { | |
75 | ITmfTrace trace = getTrace(); | |
76 | if (!(trace instanceof TmfExperiment)) { | |
77 | throw new IllegalStateException(); | |
78 | } | |
79 | return new VirtualMachineStateProvider((TmfExperiment) trace); | |
80 | } | |
81 | ||
82 | @Override | |
83 | protected @NonNull StateSystemBackendType getBackendType() { | |
84 | return StateSystemBackendType.FULL; | |
85 | } | |
86 | ||
87 | @Override | |
88 | public String getHelpText() { | |
89 | return Messages.getMessage(Messages.VirtualMachineCPUAnalysis_Help); | |
90 | } | |
91 | ||
92 | @Override | |
93 | protected Iterable<IAnalysisModule> getDependentAnalyses() { | |
94 | Set<IAnalysisModule> modules = new HashSet<>(); | |
95 | /* Depends on the LTTng Kernel analysis modules */ | |
96 | for (ITmfTrace trace : TmfTraceManager.getTraceSet(getTrace())) { | |
97 | for (LttngKernelAnalysis module : TmfTraceUtils.getAnalysisModulesOfClass(trace, LttngKernelAnalysis.class)) { | |
98 | modules.add(module); | |
99 | } | |
100 | } | |
101 | return modules; | |
102 | } | |
103 | ||
104 | private static Multimap<Integer, ITmfStateInterval> createThreadMultimap() { | |
105 | ||
106 | /* | |
107 | * Create the multimap for threads with the appropriate comparator | |
108 | * objects for keys and values | |
109 | */ | |
110 | final Multimap<Integer, ITmfStateInterval> map = NonNullUtils.checkNotNull(TreeMultimap.<Integer, ITmfStateInterval> create( | |
111 | new Comparator<Integer>() { | |
112 | @Override | |
113 | public int compare(@Nullable Integer arg0, @Nullable Integer arg1) { | |
114 | /* | |
115 | * Keys do not have to be sorted, just use natural | |
116 | * sorting | |
117 | */ | |
118 | if (arg0 == null || arg1 == null) { | |
119 | return -1; | |
120 | } | |
121 | return arg0.compareTo(arg1); | |
122 | } | |
123 | }, new Comparator<ITmfStateInterval>() { | |
124 | @Override | |
125 | public int compare(@Nullable ITmfStateInterval arg0, @Nullable ITmfStateInterval arg1) { | |
126 | if (arg0 == null || arg1 == null) { | |
127 | return 0; | |
128 | } | |
129 | if (arg1.getStateValue() == VCPU_PREEMPT_VALUE && arg0.getStateValue() != VCPU_PREEMPT_VALUE) { | |
130 | /* | |
131 | * For VCPU_PREEMPT state values, the state has to | |
132 | * be after any other state that it overlaps, | |
133 | * because those intervals usually decorate the | |
134 | * other intervals. | |
135 | */ | |
136 | if (((Long) arg0.getEndTime()).compareTo(arg1.getStartTime()) < 0) { | |
137 | return -1; | |
138 | } | |
139 | return ((Long) arg0.getStartTime()).compareTo(arg1.getEndTime()); | |
140 | } | |
141 | /* Otherwise, we use ordering by start time */ | |
142 | return (((Long) arg0.getStartTime()).compareTo(arg1.getStartTime())); | |
143 | } | |
144 | })); | |
145 | return map; | |
146 | } | |
147 | ||
148 | /** | |
149 | * Get the status intervals for the threads from a virtual machine. Those | |
150 | * intervals are correlated with the data from the virtual CPU's preemption | |
151 | * status. | |
152 | * | |
153 | * This method uses the Linux Kernel Analysis data for the thread's status | |
154 | * intervals. | |
155 | * | |
156 | * @param vmQuark | |
157 | * The quark of the virtual machine | |
158 | * @param start | |
159 | * The start time of the period to get the intervals from | |
160 | * @param end | |
161 | * The end time of the period to get the intervals from | |
162 | * @param resolution | |
163 | * The resolution | |
164 | * @param monitor | |
165 | * A progress monitor for this task | |
166 | * @return A map of status intervals for the machine's threads, including | |
167 | * preempted intervals. Intervals from the thread status and the CPU | |
168 | * preemption status overlap and are ordered such that CPU | |
169 | * preemption intervals are after any interval they overlap with | |
170 | */ | |
171 | public Multimap<Integer, ITmfStateInterval> getUpdatedThreadIntervals(int vmQuark, long start, long end, long resolution, IProgressMonitor monitor) { | |
172 | ||
173 | final Multimap<Integer, ITmfStateInterval> map = createThreadMultimap(); | |
174 | ||
175 | ITmfStateSystem ss = getStateSystem(); | |
176 | if (ss == null) { | |
177 | return map; | |
178 | } | |
179 | ITmfTrace trace = getTrace(); | |
180 | if (!(trace instanceof TmfExperiment)) { | |
181 | return map; | |
182 | } | |
183 | ||
184 | String vmHostId = NonNullUtils.checkNotNull(ss.getAttributeName(vmQuark)); | |
185 | LttngKernelAnalysis kernelModule = TmfExperimentUtils.getAnalysisModuleOfClassForHost((TmfExperiment) trace, vmHostId, LttngKernelAnalysis.class); | |
186 | if (kernelModule == null) { | |
187 | return map; | |
188 | } | |
189 | ||
190 | /* | |
191 | * Initialize the map with the original status intervals from the kernel | |
192 | * module | |
193 | */ | |
194 | for (Integer tid : LttngKernelThreadInformationProvider.getThreadIds(kernelModule)) { | |
195 | if (tid == null) { | |
196 | throw new IllegalStateException(); | |
197 | } | |
198 | map.putAll(tid, LttngKernelThreadInformationProvider.getStatusIntervalsForThread(kernelModule, tid, start, end, resolution, monitor)); | |
199 | if (monitor.isCanceled()) { | |
200 | return map; | |
201 | } | |
202 | } | |
203 | ||
204 | try { | |
205 | /* Correlate thread information with virtual CPU information */ | |
206 | for (Integer vcpuQuark : ss.getSubAttributes(vmQuark, false)) { | |
207 | Long virtualCPU = Long.parseLong(ss.getAttributeName(vcpuQuark)); | |
208 | Integer statusQuark = ss.getQuarkRelative(vcpuQuark, VmAttributes.STATUS); | |
209 | ||
210 | for (ITmfStateInterval cpuInterval : StateSystemUtils.queryHistoryRange(ss, statusQuark, start, end - 1, resolution, monitor)) { | |
211 | ITmfStateValue stateValue = cpuInterval.getStateValue(); | |
212 | switch (stateValue.getType()) { | |
213 | case INTEGER: | |
214 | int value = stateValue.unboxInt(); | |
215 | /* | |
216 | * If the current CPU is either preempted or in | |
217 | * hypervisor mode, add preempted intervals to running | |
218 | * processes | |
219 | */ | |
220 | if ((value & (VcpuStateValues.VCPU_PREEMPT | VcpuStateValues.VCPU_VMM)) == 0) { | |
221 | break; | |
222 | } | |
223 | Integer threadOnCpu = LttngKernelThreadInformationProvider.getThreadOnCpu(kernelModule, virtualCPU, cpuInterval.getStartTime()); | |
224 | if (threadOnCpu != null) { | |
225 | map.put(threadOnCpu, new TmfStateInterval(cpuInterval.getStartTime(), cpuInterval.getEndTime(), threadOnCpu, VCPU_PREEMPT_VALUE)); | |
226 | } | |
227 | break; | |
228 | case DOUBLE: | |
229 | case LONG: | |
230 | case NULL: | |
231 | case STRING: | |
232 | default: | |
233 | break; | |
234 | } | |
235 | ||
236 | } | |
237 | } | |
238 | } catch (AttributeNotFoundException | StateSystemDisposedException e) { | |
239 | } | |
240 | return NonNullUtils.checkNotNull(map); | |
241 | } | |
242 | ||
243 | } |