ctf: Make events immutable
[deliverable/tracecompass.git] / org.eclipse.linuxtools.ctf.core.tests / src / org / eclipse / linuxtools / ctf / core / tests / headless / ReadTrace.java
1 /*******************************************************************************
2 * Copyright (c) 2012, 2014 Ericsson
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 * Matthew Khouzam - Initial API and implementation
11 *******************************************************************************/
12
13 package org.eclipse.linuxtools.ctf.core.tests.headless;
14
15 import java.io.FileNotFoundException;
16 import java.text.DateFormat;
17 import java.text.SimpleDateFormat;
18 import java.util.Date;
19 import java.util.Vector;
20
21 import org.eclipse.linuxtools.ctf.core.event.EventDefinition;
22 import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException;
23 import org.eclipse.linuxtools.ctf.core.trace.CTFTrace;
24 import org.eclipse.linuxtools.ctf.core.trace.CTFTraceReader;
25
26 @SuppressWarnings("javadoc")
27 public class ReadTrace {
28
29 /**
30 * @param args
31 * @throws FileNotFoundException
32 */
33 public static void main(String[] args) throws FileNotFoundException {
34 final String TRACE_PATH = "traces/kernel";
35
36 // Change this to enable text output
37 final boolean USE_TEXT = false;
38
39 final int LOOP_COUNT = 10;
40
41 // Work variables
42 long nbEvent = 0L;
43 Vector<Double> benchs = new Vector<>();
44 CTFTrace trace = null;
45 long start, stop;
46 for (int loops = 0; loops < LOOP_COUNT; loops++) {
47 try {
48 nbEvent = 0L;
49 trace = new CTFTrace(TRACE_PATH);
50 } catch (CTFReaderException e) {
51 throw new FileNotFoundException(TRACE_PATH);
52 }
53 start = System.nanoTime();
54 if (USE_TEXT) {
55 System.out.println("Event, " + " Time, " + " type, " + " CPU ");
56 }
57 try (CTFTraceReader traceReader = new CTFTraceReader(trace);) {
58 start = System.nanoTime();
59
60 while (traceReader.hasMoreEvents()) {
61 EventDefinition ed = traceReader.getCurrentEventDef();
62 nbEvent++;
63 if (USE_TEXT) {
64 String output = formatDate(ed.getTimestamp()
65 + trace.getOffset());
66 System.out.println(nbEvent + ", "
67 + output + ", " + ed.getDeclaration().getName()
68 + ", " + ed.getCPU() + ed.getFields().toString());
69 }
70
71 traceReader.advance();
72 }
73
74 stop = System.nanoTime();
75
76 System.out.print('.');
77 double time = (stop - start) / (double) nbEvent;
78 benchs.add(time);
79 } catch (CTFReaderException e) {
80 System.out.println("error");
81 }
82 }
83 System.out.println("");
84 double avg = 0;
85 for (Double val : benchs) {
86 avg += val;
87 }
88 avg /= benchs.size();
89 System.out.println("Time to read " + nbEvent + " events = " + avg
90 + " ns/event");
91 for (Double val : benchs) {
92 System.out.print(val);
93 System.out.print(", ");
94 }
95 }
96
97 /**
98 * @param timestamp
99 * the timestamp in UTC to convert to nanoseconds.
100 * @return formatted string.
101 */
102 private static String formatDate(long timestamp) {
103 Date d = new Date(timestamp / 1000000);
104 DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.");
105 String output = df.format(d) + (timestamp % 1000000000);
106 return output;
107 }
108 }
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