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866e5b51 | 1 | /******************************************************************************* |
93a45b54 | 2 | * Copyright (c) 2011, 2014 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 | ||
b3151232 | 16 | import java.io.IOException; |
0594c61c | 17 | import java.util.ArrayList; |
fe75d403 | 18 | import java.util.HashSet; |
0594c61c | 19 | import java.util.List; |
866e5b51 FC |
20 | import java.util.PriorityQueue; |
21 | import java.util.Set; | |
866e5b51 | 22 | |
866e5b51 | 23 | import org.eclipse.linuxtools.ctf.core.event.EventDefinition; |
53359017 | 24 | import org.eclipse.linuxtools.ctf.core.event.IEventDeclaration; |
a9d52b8f | 25 | import org.eclipse.linuxtools.internal.ctf.core.Activator; |
ce2388e0 FC |
26 | import org.eclipse.linuxtools.internal.ctf.core.trace.StreamInputReaderTimestampComparator; |
27 | ||
53359017 MK |
28 | import com.google.common.collect.ImmutableSet; |
29 | import com.google.common.collect.ImmutableSet.Builder; | |
30 | ||
866e5b51 | 31 | /** |
d37aaa7f | 32 | * A CTF trace reader. Reads the events of a trace. |
1d7277f3 | 33 | * |
d37aaa7f FC |
34 | * @version 1.0 |
35 | * @author Matthew Khouzam | |
36 | * @author Alexandre Montplaisir | |
866e5b51 | 37 | */ |
dd9752d5 | 38 | public class CTFTraceReader implements AutoCloseable { |
866e5b51 | 39 | |
fe75d403 MK |
40 | private static final int MIN_PRIO_SIZE = 16; |
41 | ||
866e5b51 FC |
42 | // ------------------------------------------------------------------------ |
43 | // Attributes | |
44 | // ------------------------------------------------------------------------ | |
45 | ||
46 | /** | |
47 | * The trace to read from. | |
48 | */ | |
93a45b54 | 49 | private final CTFTrace fTrace; |
866e5b51 FC |
50 | |
51 | /** | |
52 | * Vector of all the trace file readers. | |
53 | */ | |
d84419e1 | 54 | private final List<CTFStreamInputReader> fStreamInputReaders = new ArrayList<>(); |
866e5b51 FC |
55 | |
56 | /** | |
57 | * Priority queue to order the trace file readers by timestamp. | |
58 | */ | |
d84419e1 | 59 | private PriorityQueue<CTFStreamInputReader> fPrio; |
866e5b51 FC |
60 | |
61 | /** | |
62 | * Array to count the number of event per trace file. | |
63 | */ | |
93a45b54 | 64 | private long[] fEventCountPerTraceFile; |
866e5b51 FC |
65 | |
66 | /** | |
67 | * Timestamp of the first event in the trace | |
68 | */ | |
93a45b54 | 69 | private long fStartTime; |
866e5b51 FC |
70 | |
71 | /** | |
72 | * Timestamp of the last event read so far | |
73 | */ | |
93a45b54 | 74 | private long fEndTime; |
866e5b51 FC |
75 | |
76 | // ------------------------------------------------------------------------ | |
77 | // Constructors | |
78 | // ------------------------------------------------------------------------ | |
79 | ||
80 | /** | |
81 | * Constructs a TraceReader to read a trace. | |
82 | * | |
83 | * @param trace | |
84 | * The trace to read from. | |
db8e8f7d AM |
85 | * @throws CTFReaderException |
86 | * if an error occurs | |
866e5b51 | 87 | */ |
db8e8f7d | 88 | public CTFTraceReader(CTFTrace trace) throws CTFReaderException { |
93a45b54 MK |
89 | fTrace = trace; |
90 | fStreamInputReaders.clear(); | |
866e5b51 FC |
91 | |
92 | /** | |
93 | * Create the trace file readers. | |
94 | */ | |
95 | createStreamInputReaders(); | |
96 | ||
97 | /** | |
98 | * Populate the timestamp-based priority queue. | |
99 | */ | |
100 | populateStreamInputReaderHeap(); | |
101 | ||
102 | /** | |
bfe038ff MK |
103 | * Get the start Time of this trace bear in mind that the trace could be |
104 | * empty. | |
866e5b51 | 105 | */ |
93a45b54 | 106 | fStartTime = 0; |
33656d8e | 107 | if (hasMoreEvents()) { |
0af5eb9a | 108 | fStartTime = getTopStream().getCurrentEvent().getTimestamp(); |
93a45b54 | 109 | setEndTime(fStartTime); |
33656d8e | 110 | } |
866e5b51 FC |
111 | } |
112 | ||
113 | /** | |
114 | * Copy constructor | |
be6df2d8 AM |
115 | * |
116 | * @return The new CTFTraceReader | |
6a5251eb MK |
117 | * @throws CTFReaderException |
118 | * if an error occurs | |
866e5b51 | 119 | */ |
db8e8f7d | 120 | public CTFTraceReader copyFrom() throws CTFReaderException { |
866e5b51 FC |
121 | CTFTraceReader newReader = null; |
122 | ||
93a45b54 MK |
123 | newReader = new CTFTraceReader(fTrace); |
124 | newReader.fStartTime = fStartTime; | |
125 | newReader.setEndTime(fEndTime); | |
866e5b51 FC |
126 | return newReader; |
127 | } | |
128 | ||
5d1c6919 PT |
129 | /** |
130 | * Dispose the CTFTraceReader | |
db8e8f7d | 131 | * |
dd9752d5 | 132 | * @since 3.0 |
5d1c6919 | 133 | */ |
dd9752d5 AM |
134 | @Override |
135 | public void close() { | |
d84419e1 | 136 | for (CTFStreamInputReader reader : fStreamInputReaders) { |
5d1c6919 | 137 | if (reader != null) { |
b3151232 MK |
138 | try { |
139 | reader.close(); | |
140 | } catch (IOException e) { | |
141 | Activator.logError(e.getMessage(), e); | |
142 | } | |
5d1c6919 PT |
143 | } |
144 | } | |
93a45b54 | 145 | fStreamInputReaders.clear(); |
5d1c6919 PT |
146 | } |
147 | ||
866e5b51 FC |
148 | // ------------------------------------------------------------------------ |
149 | // Getters/Setters/Predicates | |
150 | // ------------------------------------------------------------------------ | |
151 | ||
152 | /** | |
153 | * Return the start time of this trace (== timestamp of the first event) | |
154 | * | |
0d9a6d76 | 155 | * @return the trace start time |
866e5b51 FC |
156 | */ |
157 | public long getStartTime() { | |
93a45b54 | 158 | return fStartTime; |
866e5b51 FC |
159 | } |
160 | ||
6f4e8ec0 AM |
161 | /** |
162 | * Set the trace's end time | |
163 | * | |
164 | * @param endTime | |
165 | * The end time to use | |
166 | */ | |
0594c61c | 167 | protected final void setEndTime(long endTime) { |
93a45b54 | 168 | fEndTime = endTime; |
6f4e8ec0 AM |
169 | } |
170 | ||
0594c61c AM |
171 | /** |
172 | * Get the priority queue of this trace reader. | |
173 | * | |
174 | * @return The priority queue of input readers | |
175 | * @since 2.0 | |
176 | */ | |
d84419e1 | 177 | protected PriorityQueue<CTFStreamInputReader> getPrio() { |
93a45b54 | 178 | return fPrio; |
0594c61c AM |
179 | } |
180 | ||
866e5b51 FC |
181 | // ------------------------------------------------------------------------ |
182 | // Operations | |
183 | // ------------------------------------------------------------------------ | |
184 | ||
185 | /** | |
186 | * Creates one trace file reader per trace file contained in the trace. | |
db8e8f7d AM |
187 | * |
188 | * @throws CTFReaderException | |
189 | * if an error occurs | |
866e5b51 | 190 | */ |
db8e8f7d | 191 | private void createStreamInputReaders() throws CTFReaderException { |
866e5b51 FC |
192 | /* |
193 | * For each stream. | |
194 | */ | |
d84419e1 AM |
195 | for (CTFStream stream : fTrace.getStreams()) { |
196 | Set<CTFStreamInput> streamInputs = stream.getStreamInputs(); | |
866e5b51 FC |
197 | |
198 | /* | |
199 | * For each trace file of the stream. | |
200 | */ | |
d84419e1 | 201 | for (CTFStreamInput streamInput : streamInputs) { |
866e5b51 FC |
202 | |
203 | /* | |
05ce5fef | 204 | * Create a reader and add it to the group. |
866e5b51 | 205 | */ |
05ce5fef | 206 | fStreamInputReaders.add(new CTFStreamInputReader(streamInput)); |
866e5b51 FC |
207 | } |
208 | } | |
209 | ||
210 | /* | |
211 | * Create the array to count the number of event per trace file. | |
212 | */ | |
93a45b54 | 213 | fEventCountPerTraceFile = new long[fStreamInputReaders.size()]; |
866e5b51 FC |
214 | } |
215 | ||
fe75d403 MK |
216 | /** |
217 | * Update the priority queue to make it match the parent trace | |
218 | * | |
219 | * @throws CTFReaderException | |
220 | * An error occured | |
221 | * | |
222 | * @since 3.0 | |
223 | */ | |
224 | public void update() throws CTFReaderException { | |
d84419e1 AM |
225 | Set<CTFStreamInputReader> readers = new HashSet<>(); |
226 | for (CTFStream stream : fTrace.getStreams()) { | |
227 | Set<CTFStreamInput> streamInputs = stream.getStreamInputs(); | |
228 | for (CTFStreamInput streamInput : streamInputs) { | |
fe75d403 MK |
229 | /* |
230 | * Create a reader. | |
231 | */ | |
d84419e1 | 232 | CTFStreamInputReader streamInputReader = new CTFStreamInputReader( |
fe75d403 MK |
233 | streamInput); |
234 | ||
235 | /* | |
236 | * Add it to the group. | |
237 | */ | |
238 | if (!fStreamInputReaders.contains(streamInputReader)) { | |
239 | streamInputReader.readNextEvent(); | |
240 | fStreamInputReaders.add(streamInputReader); | |
241 | readers.add(streamInputReader); | |
242 | } | |
243 | } | |
244 | } | |
245 | long[] temp = fEventCountPerTraceFile; | |
246 | fEventCountPerTraceFile = new long[readers.size() + temp.length]; | |
d84419e1 | 247 | for (CTFStreamInputReader reader : readers) { |
fe75d403 MK |
248 | fPrio.add(reader); |
249 | } | |
250 | for (int i = 0; i < temp.length; i++) { | |
251 | fEventCountPerTraceFile[i] = temp[i]; | |
252 | } | |
253 | } | |
254 | ||
53359017 MK |
255 | /** |
256 | * Gets an iterable of the stream input readers, useful for foreaches | |
257 | * | |
258 | * @return the iterable of the stream input readers | |
259 | * @since 3.0 | |
260 | */ | |
261 | public Iterable<IEventDeclaration> getEventDeclarations() { | |
262 | ImmutableSet.Builder<IEventDeclaration> builder = new Builder<>(); | |
d84419e1 | 263 | for (CTFStreamInputReader sir : fStreamInputReaders) { |
53359017 MK |
264 | builder.addAll(sir.getEventDeclarations()); |
265 | } | |
266 | return builder.build(); | |
267 | } | |
268 | ||
866e5b51 FC |
269 | /** |
270 | * Initializes the priority queue used to choose the trace file with the | |
271 | * lower next event timestamp. | |
db8e8f7d AM |
272 | * |
273 | * @throws CTFReaderException | |
274 | * if an error occurs | |
866e5b51 | 275 | */ |
db8e8f7d | 276 | private void populateStreamInputReaderHeap() throws CTFReaderException { |
93a45b54 | 277 | if (fStreamInputReaders.isEmpty()) { |
fe75d403 MK |
278 | fPrio = new PriorityQueue<>(MIN_PRIO_SIZE, |
279 | new StreamInputReaderTimestampComparator()); | |
b5354daa MAL |
280 | return; |
281 | } | |
282 | ||
866e5b51 FC |
283 | /* |
284 | * Create the priority queue with a size twice as bigger as the number | |
285 | * of reader in order to avoid constant resizing. | |
286 | */ | |
93a45b54 | 287 | fPrio = new PriorityQueue<>( |
fe75d403 | 288 | Math.max(fStreamInputReaders.size() * 2, MIN_PRIO_SIZE), |
866e5b51 FC |
289 | new StreamInputReaderTimestampComparator()); |
290 | ||
291 | int pos = 0; | |
292 | ||
d84419e1 | 293 | for (CTFStreamInputReader reader : fStreamInputReaders) { |
866e5b51 FC |
294 | /* |
295 | * Add each trace file reader in the priority queue, if we are able | |
296 | * to read an event from it. | |
297 | */ | |
bfe038ff | 298 | reader.setParent(this); |
6a5251eb MK |
299 | CTFResponse readNextEvent = reader.readNextEvent(); |
300 | if (readNextEvent == CTFResponse.OK || readNextEvent == CTFResponse.WAIT) { | |
93a45b54 | 301 | fPrio.add(reader); |
866e5b51 | 302 | |
93a45b54 | 303 | fEventCountPerTraceFile[pos] = 0; |
866e5b51 FC |
304 | reader.setName(pos); |
305 | ||
306 | pos++; | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
311 | /** | |
312 | * Get the current event, which is the current event of the trace file | |
313 | * reader with the lowest timestamp. | |
314 | * | |
315 | * @return An event definition, or null of the trace reader reached the end | |
316 | * of the trace. | |
317 | */ | |
318 | public EventDefinition getCurrentEventDef() { | |
d84419e1 | 319 | CTFStreamInputReader top = getTopStream(); |
866e5b51 FC |
320 | return (top != null) ? top.getCurrentEvent() : null; |
321 | } | |
322 | ||
323 | /** | |
324 | * Go to the next event. | |
325 | * | |
326 | * @return True if an event was read. | |
db8e8f7d AM |
327 | * @throws CTFReaderException |
328 | * if an error occurs | |
866e5b51 | 329 | */ |
db8e8f7d | 330 | public boolean advance() throws CTFReaderException { |
866e5b51 FC |
331 | /* |
332 | * Remove the reader from the top of the priority queue. | |
333 | */ | |
d84419e1 | 334 | CTFStreamInputReader top = fPrio.poll(); |
866e5b51 FC |
335 | |
336 | /* | |
337 | * If the queue was empty. | |
338 | */ | |
339 | if (top == null) { | |
340 | return false; | |
341 | } | |
866e5b51 FC |
342 | /* |
343 | * Read the next event of this reader. | |
344 | */ | |
6a5251eb MK |
345 | switch (top.readNextEvent()) { |
346 | case OK: { | |
866e5b51 FC |
347 | /* |
348 | * Add it back in the queue. | |
349 | */ | |
93a45b54 MK |
350 | fPrio.add(top); |
351 | final long topEnd = fTrace.timestampCyclesToNanos(top.getCurrentEvent().getTimestamp()); | |
352 | setEndTime(Math.max(topEnd, getEndTime())); | |
353 | fEventCountPerTraceFile[top.getName()]++; | |
866e5b51 | 354 | |
bfe038ff | 355 | if (top.getCurrentEvent() != null) { |
93a45b54 MK |
356 | fEndTime = Math.max(top.getCurrentEvent().getTimestamp(), |
357 | fEndTime); | |
bfe038ff | 358 | } |
6a5251eb MK |
359 | break; |
360 | } | |
361 | case WAIT: { | |
362 | fPrio.add(top); | |
363 | break; | |
364 | } | |
365 | case FINISH: | |
366 | break; | |
367 | case ERROR: | |
368 | default: | |
369 | // something bad happend | |
bfe038ff | 370 | } |
866e5b51 FC |
371 | /* |
372 | * If there is no reader in the queue, it means the trace reader reached | |
373 | * the end of the trace. | |
374 | */ | |
bfe038ff | 375 | return hasMoreEvents(); |
866e5b51 FC |
376 | } |
377 | ||
378 | /** | |
379 | * Go to the last event in the trace. | |
db8e8f7d AM |
380 | * |
381 | * @throws CTFReaderException | |
382 | * if an error occurs | |
866e5b51 | 383 | */ |
db8e8f7d | 384 | public void goToLastEvent() throws CTFReaderException { |
93a45b54 MK |
385 | seek(getEndTime()); |
386 | while (fPrio.size() > 1) { | |
387 | advance(); | |
866e5b51 FC |
388 | } |
389 | } | |
390 | ||
391 | /** | |
ecb12461 EB |
392 | * Seeks to a given timestamp. It will seek to the nearest event greater or |
393 | * equal to timestamp. If a trace is [10 20 30 40] and you are looking for | |
394 | * 19, it will give you 20. If you want 20, you will get 20, if you want 21, | |
395 | * you will get 30. The value -inf will seek to the first element and the | |
396 | * value +inf will seek to the end of the file (past the last event). | |
866e5b51 FC |
397 | * |
398 | * @param timestamp | |
399 | * the timestamp to seek to | |
6a5251eb MK |
400 | * @return true if there are events above or equal the seek timestamp, false |
401 | * if seek at the end of the trace (no valid event). | |
db8e8f7d AM |
402 | * @throws CTFReaderException |
403 | * if an error occurs | |
866e5b51 | 404 | */ |
db8e8f7d | 405 | public boolean seek(long timestamp) throws CTFReaderException { |
866e5b51 FC |
406 | /* |
407 | * Remove all the trace readers from the priority queue | |
408 | */ | |
93a45b54 | 409 | fPrio.clear(); |
d84419e1 | 410 | for (CTFStreamInputReader streamInputReader : fStreamInputReaders) { |
866e5b51 FC |
411 | /* |
412 | * Seek the trace reader. | |
413 | */ | |
bfe038ff | 414 | streamInputReader.seek(timestamp); |
ce2388e0 FC |
415 | |
416 | /* | |
417 | * Add it to the priority queue if there is a current event. | |
418 | */ | |
ce2388e0 | 419 | if (streamInputReader.getCurrentEvent() != null) { |
93a45b54 | 420 | fPrio.add(streamInputReader); |
ce2388e0 FC |
421 | } |
422 | } | |
866e5b51 FC |
423 | return hasMoreEvents(); |
424 | } | |
425 | ||
9ac2eb62 | 426 | /** |
ecb12461 | 427 | * Gets the stream with the oldest event |
9ac2eb62 MK |
428 | * |
429 | * @return the stream with the oldest event | |
d84419e1 | 430 | * @since 3.0 |
9ac2eb62 | 431 | */ |
d84419e1 | 432 | public CTFStreamInputReader getTopStream() { |
93a45b54 | 433 | return fPrio.peek(); |
ce2388e0 FC |
434 | } |
435 | ||
866e5b51 FC |
436 | /** |
437 | * Does the trace have more events? | |
438 | * | |
439 | * @return true if yes. | |
440 | */ | |
0594c61c | 441 | public final boolean hasMoreEvents() { |
93a45b54 | 442 | return fPrio.size() > 0; |
866e5b51 FC |
443 | } |
444 | ||
445 | /** | |
446 | * Prints the event count stats. | |
447 | */ | |
448 | public void printStats() { | |
449 | printStats(60); | |
450 | } | |
451 | ||
452 | /** | |
453 | * Prints the event count stats. | |
454 | * | |
455 | * @param width | |
456 | * Width of the display. | |
457 | */ | |
458 | public void printStats(int width) { | |
459 | int numEvents = 0; | |
460 | if (width == 0) { | |
461 | return; | |
462 | } | |
463 | ||
93a45b54 | 464 | for (long i : fEventCountPerTraceFile) { |
866e5b51 FC |
465 | numEvents += i; |
466 | } | |
467 | ||
93a45b54 | 468 | for (int j = 0; j < fEventCountPerTraceFile.length; j++) { |
d84419e1 | 469 | CTFStreamInputReader se = fStreamInputReaders.get(j); |
866e5b51 | 470 | |
93a45b54 | 471 | long len = (width * fEventCountPerTraceFile[se.getName()]) |
866e5b51 FC |
472 | / numEvents; |
473 | ||
0594c61c AM |
474 | StringBuilder sb = new StringBuilder(se.getFilename()); |
475 | sb.append("\t["); //$NON-NLS-1$ | |
866e5b51 FC |
476 | |
477 | for (int i = 0; i < len; i++) { | |
478 | sb.append('+'); | |
479 | } | |
480 | ||
bfe038ff | 481 | for (long i = len; i < width; i++) { |
866e5b51 FC |
482 | sb.append(' '); |
483 | } | |
484 | ||
93a45b54 | 485 | sb.append("]\t" + fEventCountPerTraceFile[se.getName()] + " Events"); //$NON-NLS-1$//$NON-NLS-2$ |
4311ac8b | 486 | Activator.log(sb.toString()); |
866e5b51 FC |
487 | } |
488 | } | |
489 | ||
9ac2eb62 | 490 | /** |
ecb12461 | 491 | * Gets the last event timestamp that was read. This is NOT necessarily the |
9ac2eb62 MK |
492 | * last event in a trace, just the last one read so far. |
493 | * | |
494 | * @return the last event | |
495 | */ | |
866e5b51 | 496 | public long getEndTime() { |
93a45b54 | 497 | return fEndTime; |
866e5b51 FC |
498 | } |
499 | ||
6a5251eb MK |
500 | /** |
501 | * Sets a trace to be live or not | |
502 | * | |
503 | * @param live | |
504 | * whether the trace is live | |
505 | * @since 3.0 | |
506 | */ | |
507 | public void setLive(boolean live) { | |
d84419e1 | 508 | for (CTFStreamInputReader s : fPrio) { |
6a5251eb MK |
509 | s.setLive(live); |
510 | } | |
511 | } | |
512 | ||
513 | /** | |
514 | * Get if the trace is to read live or not | |
515 | * | |
516 | * @return whether the trace is live or not | |
517 | * @since 3.0 | |
518 | * | |
519 | */ | |
520 | public boolean isLive() { | |
0af5eb9a | 521 | return getTopStream().isLive(); |
6a5251eb MK |
522 | } |
523 | ||
866e5b51 FC |
524 | @Override |
525 | public int hashCode() { | |
526 | final int prime = 31; | |
527 | int result = 1; | |
93a45b54 MK |
528 | result = (prime * result) + (int) (fStartTime ^ (fStartTime >>> 32)); |
529 | result = (prime * result) + fStreamInputReaders.hashCode(); | |
530 | result = (prime * result) + ((fTrace == null) ? 0 : fTrace.hashCode()); | |
866e5b51 FC |
531 | return result; |
532 | } | |
533 | ||
534 | @Override | |
535 | public boolean equals(Object obj) { | |
536 | if (this == obj) { | |
537 | return true; | |
538 | } | |
539 | if (obj == null) { | |
540 | return false; | |
541 | } | |
07002e0a | 542 | if (!(obj instanceof CTFTraceReader)) { |
866e5b51 FC |
543 | return false; |
544 | } | |
545 | CTFTraceReader other = (CTFTraceReader) obj; | |
93a45b54 | 546 | if (!fStreamInputReaders.equals(other.fStreamInputReaders)) { |
866e5b51 FC |
547 | return false; |
548 | } | |
93a45b54 MK |
549 | if (fTrace == null) { |
550 | if (other.fTrace != null) { | |
866e5b51 FC |
551 | return false; |
552 | } | |
93a45b54 | 553 | } else if (!fTrace.equals(other.fTrace)) { |
866e5b51 FC |
554 | return false; |
555 | } | |
556 | return true; | |
557 | } | |
558 | ||
866e5b51 FC |
559 | @Override |
560 | public String toString() { | |
561 | /* Only for debugging, shouldn't be externalized */ | |
93a45b54 | 562 | return "CTFTraceReader [trace=" + fTrace + ']'; //$NON-NLS-1$ |
866e5b51 FC |
563 | } |
564 | ||
9ac2eb62 MK |
565 | /** |
566 | * Gets the parent trace | |
567 | * | |
568 | * @return the parent trace | |
569 | */ | |
866e5b51 | 570 | public CTFTrace getTrace() { |
93a45b54 | 571 | return fTrace; |
866e5b51 FC |
572 | } |
573 | } |