org.eclipse.linuxtools.ctf.core.tests/src/org/eclipse/linuxtools/ctf/core/tests/headless/ReadTrace.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2013 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.text.DateFormat;
  16 import java.text.SimpleDateFormat;
  17 import java.util.Date;
  18 import java.util.Vector;
  19
  20 import org.eclipse.linuxtools.ctf.core.event.EventDefinition;
  21 import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException;
  22 import org.eclipse.linuxtools.ctf.core.trace.CTFTrace;
  23 import org.eclipse.linuxtools.ctf.core.trace.CTFTraceReader;
  24
  25 @SuppressWarnings("javadoc")
  26 public class ReadTrace {
  27
  28     /**
  29      * @param args
  30      */
  31     public static void main(String[] args) {
  32         final String TRACE_PATH = "traces/kernel";
  33
  34         // Change this to enable text output
  35         final boolean USE_TEXT = false;
  36
  37         final int LOOP_COUNT = 1;
  38
  39         // Work variables
  40         Long nbEvent = 0L;
  41         Vector<Double> benchs = new Vector<Double>();
  42         CTFTrace trace = null;
  43         long start, stop;
  44         for (int loops = 0; loops < LOOP_COUNT; loops++) {
  45             try {
  46                 nbEvent = 0L;
  47                 trace = new CTFTrace(TRACE_PATH);
  48             } catch (CTFReaderException e) {
  49                 // do nothing
  50             }
  51             start = System.nanoTime();
  52             if (USE_TEXT) {
  53                 System.out.println("Event, " + " Time, " + " type, " + " CPU ");
  54             }
  55             if (trace != null) {
  56                 CTFTraceReader traceReader = new CTFTraceReader(trace);
  57
  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                     // long endTime = traceReader.getEndTime();
  71                     // long timestamp = traceReader.getCurrentEventDef().getTimestamp();
  72                     traceReader.advance();
  73                 }
  74                 // Map<Long, Stream> streams = traceReader.getTrace().getStreams();
  75             }
  76             stop = System.nanoTime();
  77
  78             System.out.print('.');
  79             double time = (stop - start) / (double) nbEvent;
  80             benchs.add(time);
  81         }
  82         System.out.println("");
  83         double avg = 0;
  84         for (Double val : benchs) {
  85             avg += val;
  86         }
  87         avg /= benchs.size();
  88         System.out.println("Time to read " + nbEvent + " events = " + avg
  89                 + " ns/event");
  90         for (Double val : benchs) {
  91             System.out.print(val);
  92             System.out.print(", ");
  93         }
  94     }
  95
  96     /**
  97      * @param timestamp
  98      *            the timestamp in UTC to convert to nanoseconds.
  99      * @return formatted string.
 100      */
 101     private static String formatDate(long timestamp) {
 102         Date d = new Date(timestamp / 1000000);
 103         DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.");
 104         String output = df.format(d) + (timestamp % 1000000000);
 105         return output;
 106     }
 107 }