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866e5b51 | 1 | /******************************************************************************* |
4bd7f2db | 2 | * Copyright (c) 2011, 2013 Ericsson, Ecole Polytechnique de Montreal and others |
866e5b51 FC |
3 | * |
4 | * All rights reserved. This program and the accompanying materials are made | |
5 | * 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 | * | |
4311ac8b MAL |
9 | * Contributors: |
10 | * Matthew Khouzam - Initial API and implementation | |
11 | * Alexandre Montplaisir - Initial API and implementation | |
866e5b51 FC |
12 | *******************************************************************************/ |
13 | ||
14 | package org.eclipse.linuxtools.ctf.core.trace; | |
15 | ||
16 | import java.util.Collection; | |
17 | import java.util.PriorityQueue; | |
18 | import java.util.Set; | |
19 | import java.util.Vector; | |
20 | ||
866e5b51 | 21 | import org.eclipse.linuxtools.ctf.core.event.EventDefinition; |
a9d52b8f | 22 | import org.eclipse.linuxtools.internal.ctf.core.Activator; |
ce2388e0 FC |
23 | import org.eclipse.linuxtools.internal.ctf.core.trace.StreamInputReaderTimestampComparator; |
24 | ||
866e5b51 | 25 | /** |
d37aaa7f | 26 | * A CTF trace reader. Reads the events of a trace. |
1d7277f3 | 27 | * |
d37aaa7f FC |
28 | * @version 1.0 |
29 | * @author Matthew Khouzam | |
30 | * @author Alexandre Montplaisir | |
866e5b51 | 31 | */ |
866e5b51 FC |
32 | public class CTFTraceReader { |
33 | ||
34 | // ------------------------------------------------------------------------ | |
35 | // Attributes | |
36 | // ------------------------------------------------------------------------ | |
37 | ||
38 | /** | |
39 | * The trace to read from. | |
40 | */ | |
41 | private final CTFTrace trace; | |
42 | ||
43 | /** | |
44 | * Vector of all the trace file readers. | |
45 | */ | |
46 | private final Vector<StreamInputReader> streamInputReaders = new Vector<StreamInputReader>(); | |
47 | ||
48 | /** | |
49 | * Priority queue to order the trace file readers by timestamp. | |
50 | */ | |
51 | protected PriorityQueue<StreamInputReader> prio; | |
52 | ||
53 | /** | |
54 | * Array to count the number of event per trace file. | |
55 | */ | |
bfe038ff | 56 | private long[] eventCountPerTraceFile; |
866e5b51 FC |
57 | |
58 | /** | |
59 | * Timestamp of the first event in the trace | |
60 | */ | |
61 | private long startTime; | |
62 | ||
63 | /** | |
64 | * Timestamp of the last event read so far | |
65 | */ | |
66 | private long endTime; | |
67 | ||
68 | // ------------------------------------------------------------------------ | |
69 | // Constructors | |
70 | // ------------------------------------------------------------------------ | |
71 | ||
72 | /** | |
73 | * Constructs a TraceReader to read a trace. | |
74 | * | |
75 | * @param trace | |
76 | * The trace to read from. | |
866e5b51 FC |
77 | */ |
78 | public CTFTraceReader(CTFTrace trace) { | |
79 | this.trace = trace; | |
bfe038ff | 80 | streamInputReaders.clear(); |
866e5b51 FC |
81 | |
82 | /** | |
83 | * Create the trace file readers. | |
84 | */ | |
85 | createStreamInputReaders(); | |
86 | ||
87 | /** | |
88 | * Populate the timestamp-based priority queue. | |
89 | */ | |
90 | populateStreamInputReaderHeap(); | |
91 | ||
92 | /** | |
bfe038ff MK |
93 | * Get the start Time of this trace bear in mind that the trace could be |
94 | * empty. | |
866e5b51 | 95 | */ |
33656d8e MK |
96 | this.startTime = 0;// prio.peek().getPacketReader().getCurrentPacket().getTimestampBegin(); |
97 | if (hasMoreEvents()) { | |
aa572e22 | 98 | this.startTime = prio.peek().getCurrentEvent().getTimestamp(); |
1191a574 | 99 | this.setEndTime(this.startTime); |
33656d8e | 100 | } |
866e5b51 FC |
101 | } |
102 | ||
103 | /** | |
104 | * Copy constructor | |
be6df2d8 AM |
105 | * |
106 | * @return The new CTFTraceReader | |
866e5b51 FC |
107 | */ |
108 | public CTFTraceReader copyFrom() { | |
109 | CTFTraceReader newReader = null; | |
110 | ||
111 | newReader = new CTFTraceReader(this.trace); | |
112 | newReader.startTime = this.startTime; | |
1191a574 | 113 | newReader.setEndTime(this.endTime); |
866e5b51 FC |
114 | return newReader; |
115 | } | |
116 | ||
5d1c6919 PT |
117 | /** |
118 | * Dispose the CTFTraceReader | |
119 | * @since 2.0 | |
120 | */ | |
121 | public void dispose() { | |
122 | for (StreamInputReader reader : streamInputReaders) { | |
123 | if (reader != null) { | |
124 | reader.dispose(); | |
125 | } | |
126 | } | |
127 | streamInputReaders.clear(); | |
128 | } | |
129 | ||
866e5b51 FC |
130 | // ------------------------------------------------------------------------ |
131 | // Getters/Setters/Predicates | |
132 | // ------------------------------------------------------------------------ | |
133 | ||
134 | /** | |
135 | * Return the start time of this trace (== timestamp of the first event) | |
136 | * | |
0d9a6d76 | 137 | * @return the trace start time |
866e5b51 FC |
138 | */ |
139 | public long getStartTime() { | |
140 | return this.startTime; | |
141 | } | |
142 | ||
6f4e8ec0 AM |
143 | /** |
144 | * Set the trace's end time | |
145 | * | |
146 | * @param endTime | |
147 | * The end time to use | |
148 | */ | |
149 | protected void setEndTime(long endTime) { | |
150 | this.endTime = endTime; | |
151 | } | |
152 | ||
153 | ||
866e5b51 FC |
154 | // ------------------------------------------------------------------------ |
155 | // Operations | |
156 | // ------------------------------------------------------------------------ | |
157 | ||
158 | /** | |
159 | * Creates one trace file reader per trace file contained in the trace. | |
160 | */ | |
161 | private void createStreamInputReaders() { | |
162 | Collection<Stream> streams = this.trace.getStreams().values(); | |
163 | ||
164 | /* | |
165 | * For each stream. | |
166 | */ | |
167 | for (Stream stream : streams) { | |
168 | Set<StreamInput> streamInputs = stream.getStreamInputs(); | |
169 | ||
170 | /* | |
171 | * For each trace file of the stream. | |
172 | */ | |
173 | for (StreamInput streamInput : streamInputs) { | |
174 | /* | |
175 | * Create a reader. | |
176 | */ | |
177 | StreamInputReader streamInputReader = new StreamInputReader( | |
178 | streamInput); | |
179 | ||
180 | /* | |
181 | * Add it to the group. | |
182 | */ | |
183 | this.streamInputReaders.add(streamInputReader); | |
184 | } | |
185 | } | |
186 | ||
187 | /* | |
188 | * Create the array to count the number of event per trace file. | |
189 | */ | |
bfe038ff | 190 | this.eventCountPerTraceFile = new long[this.streamInputReaders.size()]; |
866e5b51 FC |
191 | } |
192 | ||
193 | /** | |
194 | * Initializes the priority queue used to choose the trace file with the | |
195 | * lower next event timestamp. | |
196 | */ | |
197 | private void populateStreamInputReaderHeap() { | |
198 | /* | |
199 | * Create the priority queue with a size twice as bigger as the number | |
200 | * of reader in order to avoid constant resizing. | |
201 | */ | |
202 | this.prio = new PriorityQueue<StreamInputReader>( | |
203 | this.streamInputReaders.size() * 2, | |
204 | new StreamInputReaderTimestampComparator()); | |
205 | ||
206 | int pos = 0; | |
207 | ||
208 | for (StreamInputReader reader : this.streamInputReaders) { | |
209 | /* | |
210 | * Add each trace file reader in the priority queue, if we are able | |
211 | * to read an event from it. | |
212 | */ | |
bfe038ff | 213 | reader.setParent(this); |
866e5b51 FC |
214 | if (reader.readNextEvent()) { |
215 | this.prio.add(reader); | |
216 | ||
217 | this.eventCountPerTraceFile[pos] = 0; | |
218 | reader.setName(pos); | |
219 | ||
220 | pos++; | |
221 | } | |
222 | } | |
223 | } | |
224 | ||
225 | /** | |
226 | * Get the current event, which is the current event of the trace file | |
227 | * reader with the lowest timestamp. | |
228 | * | |
229 | * @return An event definition, or null of the trace reader reached the end | |
230 | * of the trace. | |
231 | */ | |
232 | public EventDefinition getCurrentEventDef() { | |
ce2388e0 | 233 | StreamInputReader top = getTopStream(); |
866e5b51 FC |
234 | |
235 | return (top != null) ? top.getCurrentEvent() : null; | |
236 | } | |
237 | ||
238 | /** | |
239 | * Go to the next event. | |
240 | * | |
241 | * @return True if an event was read. | |
242 | */ | |
243 | public boolean advance() { | |
ce2388e0 FC |
244 | /* |
245 | * Index the | |
246 | */ | |
866e5b51 FC |
247 | /* |
248 | * Remove the reader from the top of the priority queue. | |
249 | */ | |
250 | StreamInputReader top = this.prio.poll(); | |
251 | ||
252 | /* | |
253 | * If the queue was empty. | |
254 | */ | |
255 | if (top == null) { | |
256 | return false; | |
257 | } | |
866e5b51 FC |
258 | /* |
259 | * Read the next event of this reader. | |
260 | */ | |
261 | if (top.readNextEvent()) { | |
262 | /* | |
263 | * Add it back in the queue. | |
264 | */ | |
265 | this.prio.add(top); | |
1d7277f3 | 266 | final long topEnd = this.trace.timestampCyclesToNanos(top.getCurrentEvent().getTimestamp()); |
9ac2eb62 | 267 | this.setEndTime(Math.max(topEnd, this.getEndTime())); |
866e5b51 | 268 | this.eventCountPerTraceFile[top.getName()]++; |
866e5b51 | 269 | |
bfe038ff MK |
270 | if (top.getCurrentEvent() != null) { |
271 | this.endTime = Math.max(top.getCurrentEvent().getTimestamp(), | |
272 | this.endTime); | |
273 | } | |
274 | } | |
866e5b51 FC |
275 | /* |
276 | * If there is no reader in the queue, it means the trace reader reached | |
277 | * the end of the trace. | |
278 | */ | |
bfe038ff | 279 | return hasMoreEvents(); |
866e5b51 FC |
280 | } |
281 | ||
282 | /** | |
283 | * Go to the last event in the trace. | |
866e5b51 | 284 | */ |
bfe038ff MK |
285 | public void goToLastEvent() { |
286 | seek(this.getEndTime()); | |
287 | while (this.prio.size() > 1) { | |
288 | this.advance(); | |
866e5b51 FC |
289 | } |
290 | } | |
291 | ||
292 | /** | |
293 | * Seeks to a given timestamp It will go to the event just after the | |
294 | * timestamp or the timestamp itself. if a if a trace is 10 20 30 40 and | |
295 | * you're looking for 19, it'll give you 20, it you want 20, you'll get 20, | |
296 | * if you want 21, you'll get 30. You want -inf, you'll get the first | |
297 | * element, you want +inf, you'll get the end of the file with no events. | |
298 | * | |
299 | * @param timestamp | |
300 | * the timestamp to seek to | |
0d9a6d76 | 301 | * @return true if the trace has more events following the timestamp |
866e5b51 FC |
302 | */ |
303 | public boolean seek(long timestamp) { | |
304 | /* | |
305 | * Remove all the trace readers from the priority queue | |
306 | */ | |
307 | this.prio.clear(); | |
866e5b51 FC |
308 | for (StreamInputReader streamInputReader : this.streamInputReaders) { |
309 | /* | |
310 | * Seek the trace reader. | |
311 | */ | |
bfe038ff | 312 | streamInputReader.seek(timestamp); |
ce2388e0 FC |
313 | |
314 | /* | |
315 | * Add it to the priority queue if there is a current event. | |
316 | */ | |
317 | ||
318 | } | |
319 | for (StreamInputReader streamInputReader : this.streamInputReaders) { | |
320 | if (streamInputReader.getCurrentEvent() != null) { | |
321 | this.prio.add(streamInputReader); | |
866e5b51 | 322 | |
ce2388e0 FC |
323 | } |
324 | } | |
866e5b51 FC |
325 | return hasMoreEvents(); |
326 | } | |
327 | ||
be6df2d8 AM |
328 | // /** |
329 | // * Go to the first entry of a trace | |
330 | // * | |
331 | // * @return 0, the first index. | |
332 | // */ | |
333 | // private long goToZero() { | |
334 | // long tempIndex; | |
335 | // for (StreamInputReader streamInputReader : this.streamInputReaders) { | |
336 | // /* | |
337 | // * Seek the trace reader. | |
338 | // */ | |
339 | // streamInputReader.seek(0); | |
340 | // } | |
341 | // tempIndex = 0; | |
342 | // return tempIndex; | |
343 | // } | |
2b7f6f09 | 344 | |
9ac2eb62 MK |
345 | /** |
346 | * gets the stream with the oldest event | |
347 | * | |
348 | * @return the stream with the oldest event | |
349 | */ | |
ce2388e0 FC |
350 | public StreamInputReader getTopStream() { |
351 | return this.prio.peek(); | |
352 | } | |
353 | ||
866e5b51 FC |
354 | /** |
355 | * Does the trace have more events? | |
356 | * | |
357 | * @return true if yes. | |
358 | */ | |
359 | public boolean hasMoreEvents() { | |
360 | return this.prio.size() > 0; | |
361 | } | |
362 | ||
363 | /** | |
364 | * Prints the event count stats. | |
365 | */ | |
366 | public void printStats() { | |
367 | printStats(60); | |
368 | } | |
369 | ||
370 | /** | |
371 | * Prints the event count stats. | |
372 | * | |
373 | * @param width | |
374 | * Width of the display. | |
375 | */ | |
376 | public void printStats(int width) { | |
377 | int numEvents = 0; | |
378 | if (width == 0) { | |
379 | return; | |
380 | } | |
381 | ||
bfe038ff | 382 | for (long i : this.eventCountPerTraceFile) { |
866e5b51 FC |
383 | numEvents += i; |
384 | } | |
385 | ||
386 | for (int j = 0; j < this.eventCountPerTraceFile.length; j++) { | |
387 | StreamInputReader se = this.streamInputReaders.get(j); | |
388 | ||
bfe038ff | 389 | long len = (width * this.eventCountPerTraceFile[se.getName()]) |
866e5b51 FC |
390 | / numEvents; |
391 | ||
ce2388e0 | 392 | StringBuilder sb = new StringBuilder(se.getFilename() + "\t["); //$NON-NLS-1$ |
866e5b51 FC |
393 | |
394 | for (int i = 0; i < len; i++) { | |
395 | sb.append('+'); | |
396 | } | |
397 | ||
bfe038ff | 398 | for (long i = len; i < width; i++) { |
866e5b51 FC |
399 | sb.append(' '); |
400 | } | |
401 | ||
402 | sb.append("]\t" + this.eventCountPerTraceFile[se.getName()] + " Events"); //$NON-NLS-1$//$NON-NLS-2$ | |
4311ac8b | 403 | Activator.log(sb.toString()); |
866e5b51 FC |
404 | } |
405 | } | |
406 | ||
9ac2eb62 MK |
407 | /** |
408 | * gets the last event timestamp that was read. This is NOT necessarily the | |
409 | * last event in a trace, just the last one read so far. | |
410 | * | |
411 | * @return the last event | |
412 | */ | |
866e5b51 FC |
413 | public long getEndTime() { |
414 | return this.endTime; | |
415 | } | |
416 | ||
417 | @Override | |
418 | public int hashCode() { | |
419 | final int prime = 31; | |
420 | int result = 1; | |
866e5b51 | 421 | result = (prime * result) + (int) (startTime ^ (startTime >>> 32)); |
77fdc5df | 422 | result = (prime * result) + streamInputReaders.hashCode(); |
866e5b51 FC |
423 | result = (prime * result) + ((trace == null) ? 0 : trace.hashCode()); |
424 | return result; | |
425 | } | |
426 | ||
427 | @Override | |
428 | public boolean equals(Object obj) { | |
429 | if (this == obj) { | |
430 | return true; | |
431 | } | |
432 | if (obj == null) { | |
433 | return false; | |
434 | } | |
07002e0a | 435 | if (!(obj instanceof CTFTraceReader)) { |
866e5b51 FC |
436 | return false; |
437 | } | |
438 | CTFTraceReader other = (CTFTraceReader) obj; | |
77fdc5df | 439 | if (!streamInputReaders.equals(other.streamInputReaders)) { |
866e5b51 FC |
440 | return false; |
441 | } | |
442 | if (trace == null) { | |
443 | if (other.trace != null) { | |
444 | return false; | |
445 | } | |
446 | } else if (!trace.equals(other.trace)) { | |
447 | return false; | |
448 | } | |
449 | return true; | |
450 | } | |
451 | ||
866e5b51 FC |
452 | @Override |
453 | public String toString() { | |
454 | /* Only for debugging, shouldn't be externalized */ | |
455 | return "CTFTraceReader [trace=" + trace + ']'; //$NON-NLS-1$ | |
456 | } | |
457 | ||
9ac2eb62 MK |
458 | /** |
459 | * Gets the parent trace | |
460 | * | |
461 | * @return the parent trace | |
462 | */ | |
866e5b51 FC |
463 | public CTFTrace getTrace() { |
464 | return trace; | |
465 | } | |
466 | } |