org.eclipse.tracecompass.tmf.ctf.core.tests/src/org/eclipse/tracecompass/tmf/ctf/core/tests/temp/headless/Benchmark.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.tracecompass.tmf.ctf.core.tests.temp.headless;
  14
  15 import java.util.Vector;
  16
  17 import org.eclipse.tracecompass.tmf.core.exceptions.TmfTraceException;
  18 import org.eclipse.tracecompass.tmf.ctf.core.context.CtfTmfContext;
  19 import org.eclipse.tracecompass.tmf.ctf.core.event.CtfTmfEvent;
  20 import org.eclipse.tracecompass.tmf.ctf.core.trace.CtfTmfTrace;
  21
  22 /**
  23  * Test and benchmark reading a CTF LTTng kernel trace.
  24  *
  25  * @author Matthew Khouzam
  26  */
  27 public class Benchmark {
  28
  29     /**
  30      * Run the benchmark.
  31      *
  32      * @param args The command-line arguments
  33      */
  34     public static void main(final String[] args) {
  35         final String TRACE_PATH = "testfiles/kernel";
  36         final int NUM_LOOPS = 100;
  37
  38         // Change this to enable text output
  39         final boolean USE_TEXT = true;
  40
  41         // Work variables
  42         long nbEvent = 0L;
  43         final Vector<Double> benchs = new Vector<>();
  44         long start, stop;
  45         for (int loops = 0; loops < NUM_LOOPS; loops++) {
  46             nbEvent = 0L;
  47             try (CtfTmfTrace trace = new CtfTmfTrace();) {
  48                 try {
  49                     trace.initTrace(null, TRACE_PATH, CtfTmfEvent.class);
  50                 } catch (final TmfTraceException e) {
  51                     loops = NUM_LOOPS + 1;
  52                     break;
  53                 }
  54
  55                 start = System.nanoTime();
  56                 if (nbEvent != -1) {
  57                     final CtfTmfContext traceReader = (CtfTmfContext) trace.seekEvent(0);
  58
  59                     start = System.nanoTime();
  60                     CtfTmfEvent current = traceReader.getCurrentEvent();
  61                     while (current != null) {
  62                         nbEvent++;
  63                         if (USE_TEXT) {
  64
  65                             System.out.println("Event " + nbEvent + " Time "
  66                                     + current.getTimestamp().toString() + " type " + current.getType().getName()
  67                                     + " on CPU " + current.getCPU() + " " + current.getContent().toString());
  68                         }
  69                         // advance the trace to the next event.
  70                         boolean hasMore = traceReader.advance();
  71                         if (hasMore) {
  72                             // you can know the trace has more events.
  73                         }
  74                         current = traceReader.getCurrentEvent();
  75                     }
  76                 }
  77                 stop = System.nanoTime();
  78                 System.out.print('.');
  79                 final double time = (stop - start) / (double) nbEvent;
  80                 benchs.add(time);
  81             } // trace.close()
  82         }
  83         System.out.println("");
  84         double avg = 0;
  85         for (final double val : benchs) {
  86             avg += val;
  87         }
  88         avg /= benchs.size();
  89         System.out.println("Time to read = " + avg + " events/ns");
  90         for (final Double val : benchs) {
  91             System.out.print(val);
  92             System.out.print(", ");
  93         }
  94
  95     }
  96
  97 }