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

   1 package org.eclipse.linuxtools.lttng.core.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.internal.lttng.core.event.LttngEvent;
  15 import org.eclipse.linuxtools.internal.lttng.core.event.LttngLocation;
  16 import org.eclipse.linuxtools.internal.lttng.core.event.LttngTimestamp;
  17 import org.eclipse.linuxtools.internal.lttng.core.trace.LTTngTextTrace;
  18 import org.eclipse.linuxtools.internal.lttng.core.trace.LTTngTrace;
  19 import org.eclipse.linuxtools.tmf.core.trace.ITmfContext;
  20 import org.eclipse.linuxtools.tmf.core.trace.TmfContext;
  21 import org.eclipse.linuxtools.tmf.core.trace.TmfTrace;
  22
  23
  24 @SuppressWarnings("nls")
  25 public class LttngTraceTest {
  26
  27         /**
  28          * @param args
  29          */
  30         public static void main(String[] args) {
  31
  32                 // Path of the trace
  33         final String TRACE_PATH = "/home/francois/Desktop/Workspaces/LTTngTraces/trace_2GB";
  34         final String TRACE_NAME = "trace_2GB";
  35
  36         // *** Change to true to use the "fake" LttngTextTrace instead of LTTngTrace
  37         // To use this, you need a ".txt" trace.
  38         // You can get it using LTTv with the command "lttv -m textDump -t /tmp/sometrace > mytrace.txt"
  39         final boolean USE_TEXT_TRACE = false;
  40
  41         // *** Change this to run several time over the same trace
  42         final int NB_OF_PASS = 1;
  43
  44         // *** Change this to true to parse all the events in the trace
  45         //      Otherwise, events are just read
  46         final boolean PARSE_EVENTS = true;
  47
  48
  49         // Work variables
  50         TmfTrace<LttngEvent> tmptrace = null;
  51         LttngEvent tmpevent = null;
  52         ITmfContext tmpContext = null;
  53         Long nbEvent = 0L;
  54
  55                 try {
  56                         // ** Use TextTrace (slow!) if it was asked
  57                         if ( USE_TEXT_TRACE ) {
  58                                 tmptrace = new LTTngTextTrace(TRACE_NAME, TRACE_PATH, true);
  59                         } else {
  60                                 tmptrace = new LTTngTrace(TRACE_NAME, TRACE_PATH, null, true, true);
  61                         }
  62
  63                         LttngTimestamp tmpTime = new LttngTimestamp(0L);
  64             tmpContext = new TmfContext(new LttngLocation(0L), 0);
  65
  66
  67             long startTime = System.nanoTime();
  68             System.out.println("Start: " + startTime);
  69             for ( int nb=0; nb<NB_OF_PASS; nb++) {
  70
  71                                 // Seek to the beginning of the trace
  72                             tmpContext = tmptrace.seekEvent( tmpTime  );
  73                                 tmpevent = (LttngEvent)tmptrace.getNextEvent(tmpContext);
  74
  75                                 while ( tmpevent != null ) {
  76                                         tmpevent = (LttngEvent)tmptrace.getNextEvent(tmpContext);
  77
  78                                         // Parse the events if it was asked
  79                                         if ( (tmpevent != null) && (PARSE_EVENTS) ) {
  80                                                 tmpevent.getContent().getFields();
  81
  82                                                 // *** Uncomment the following to print the parsed content
  83                             // Warning : this is VERY intensive
  84                                                 //
  85 //                                              System.out.println(tmpevent.toString());
  86                                                 //System.out.println(testEvent.getContent().toString());
  87                                         }
  88
  89                                         nbEvent++;
  90                                 }
  91                         }
  92
  93                         System.out.println("NB events : " + nbEvent);
  94
  95             long endTime = System.nanoTime();
  96             long elapsed = endTime - startTime;
  97                         System.out.println("End: " + endTime);
  98                         System.out.println("Elapsed: " + elapsed + ", Average: " + (elapsed/nbEvent) + "ns/evt");
  99
 100                 }
 101                 catch (Exception e) {
 102                         e.printStackTrace();
 103                 }
 104
 105         }
 106
 107 }