org.eclipse.linuxtools.lttng.tests/src/org/eclipse/linuxxtools/lttng/tests/headless/LttngTraceTest.java

   1 package org.eclipse.linuxxtools.lttng.tests.headless;
   2 /*******************************************************************************
   3  * Copyright (c) 2009 Ericsson
   4  *
   5  * All rights reserved. This program and the accompanying materials are
   6  * made available under the terms of the Eclipse Public License v1.0 which
   7  * accompanies this distribution, and is available at
   8  * http://www.eclipse.org/legal/epl-v10.html
   9  *
  10  * Contributors:
  11  *   William Bourque (wbourque@gmail.com) - Initial API and implementation
  12  *******************************************************************************/
  13
  14 import org.eclipse.linuxtools.lttng.event.LttngEvent;
  15 import org.eclipse.linuxtools.lttng.event.LttngLocation;
  16 import org.eclipse.linuxtools.lttng.event.LttngTimestamp;
  17 import org.eclipse.linuxtools.lttng.trace.LTTngTextTrace;
  18 import org.eclipse.linuxtools.lttng.trace.LTTngTrace;
  19 import org.eclipse.linuxtools.tmf.trace.TmfContext;
  20 import org.eclipse.linuxtools.tmf.trace.TmfTrace;
  21
  22
  23 @SuppressWarnings("nls")
  24 public class LttngTraceTest {
  25
  26         /**
  27          * @param args
  28          */
  29         public static void main(String[] args) {
  30
  31                 // Path of the trace
  32         final String TRACE_PATH = "/home/francois/Desktop/Workspaces/LTTngTraces/trace_2GB";
  33
  34         // *** Change to true to use the "fake" LttngTextTrace instead of LTTngTrace
  35         // To use this, you need a ".txt" trace.
  36         // You can get it using LTTv with the command "lttv -m textDump -t /tmp/sometrace > mytrace.txt"
  37         final boolean USE_TEXT_TRACE = false;
  38
  39         // *** Change this to run several time over the same trace
  40         final int NB_OF_PASS = 1;
  41
  42         // *** Change this to true to parse all the events in the trace
  43         //      Otherwise, events are just read
  44         final boolean PARSE_EVENTS = true;
  45
  46
  47         // Work variables
  48         TmfTrace<LttngEvent> tmptrace = null;
  49         LttngEvent tmpevent = null;
  50         TmfContext tmpContext = null;
  51         Long nbEvent = 0L;
  52
  53                 try {
  54                         // ** Use TextTrace (slow!) if it was asked
  55                         if ( USE_TEXT_TRACE ) {
  56                                 tmptrace = new LTTngTextTrace(TRACE_PATH, true);
  57                         } else {
  58                                 tmptrace = new LTTngTrace(TRACE_PATH, null, true, true);
  59                         }
  60
  61                         LttngTimestamp tmpTime = new LttngTimestamp(0L);
  62             tmpContext = new TmfContext(new LttngLocation(0L), 0);
  63
  64
  65             long startTime = System.nanoTime();
  66             System.out.println("Start: " + startTime);
  67             for ( int nb=0; nb<NB_OF_PASS; nb++) {
  68
  69                                 // Seek to the beginning of the trace
  70                             tmpContext = tmptrace.seekEvent( tmpTime  );
  71                                 tmpevent = (LttngEvent)tmptrace.getNextEvent(tmpContext);
  72
  73                                 while ( tmpevent != null ) {
  74                                         tmpevent = (LttngEvent)tmptrace.getNextEvent(tmpContext);
  75
  76                                         // Parse the events if it was asked
  77                                         if ( (tmpevent != null) && (PARSE_EVENTS) ) {
  78                                                 tmpevent.getContent().getFields();
  79
  80                                                 // *** Uncomment the following to print the parsed content
  81                             // Warning : this is VERY intensive
  82                                                 //
  83 //                                              System.out.println(tmpevent.toString());
  84                                                 //System.out.println(testEvent.getContent().toString());
  85                                         }
  86
  87                                         nbEvent++;
  88                                 }
  89                         }
  90
  91                         System.out.println("NB events : " + nbEvent);
  92
  93             long endTime = System.nanoTime();
  94             long elapsed = endTime - startTime;
  95                         System.out.println("End: " + endTime);
  96                         System.out.println("Elapsed: " + elapsed + ", Average: " + (elapsed/nbEvent) + "ns/evt");
  97
  98                 }
  99                 catch (Exception e) {
 100                         e.printStackTrace();
 101                 }
 102
 103         }
 104
 105 }