org.eclipse.linuxtools.tmf.core.tests/src/org/eclipse/linuxtools/tmf/core/tests/ctfadaptor/headless/Benchmark.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 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 package org.eclipse.linuxtools.tmf.core.tests.ctfadaptor.headless;
  13
  14 import java.text.DateFormat;
  15 import java.text.SimpleDateFormat;
  16 import java.util.Date;
  17 import java.util.Vector;
  18
  19 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfIterator;
  20 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfEvent;
  21 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfTrace;
  22 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
  23
  24 public class Benchmark {
  25
  26     /**
  27      * @param args
  28      */
  29     @SuppressWarnings("nls")
  30     public static void main(final String[] args) {
  31         final String TRACE_PATH = "testfiles/kernel";
  32         final int NUM_LOOPS = 100;
  33
  34         // Change this to enable text output
  35         final boolean USE_TEXT = true;
  36
  37 //        try {
  38 //            System.in.read();
  39 //        } catch (final IOException e1) {
  40 //            e1.printStackTrace();
  41 //        }
  42         // Work variables
  43         Long nbEvent = 0L;
  44         final Vector<Double> benchs = new Vector<Double>();
  45         CtfTmfTrace trace = null;
  46         long start, stop;
  47         for (int loops = 0; loops < NUM_LOOPS; loops++) {
  48             nbEvent = 0L;
  49             trace = new CtfTmfTrace();
  50             try {
  51                 trace.initTrace(null, TRACE_PATH, CtfTmfEvent.class);
  52             } catch (final TmfTraceException e) {
  53                 loops = NUM_LOOPS +1;
  54                 break;
  55             }
  56
  57             start = System.nanoTime();
  58             if (nbEvent != -1) {
  59                 final CtfIterator traceReader = (CtfIterator) trace.seekEvent(0);
  60
  61                 start = System.nanoTime();
  62                 CtfTmfEvent current = traceReader.getCurrentEvent();
  63                 while (current != null) {
  64                     nbEvent++;
  65                     if (USE_TEXT) {
  66
  67                         System.out.println("Event " + traceReader.getRank() + " Time "
  68                                 + current.getTimestamp().toString() + " type " + current.getEventName()
  69                                 + " on CPU " + current.getSource() + " " + current.getContent().toString()) ;
  70                     }
  71                     traceReader.advance();
  72                     current = traceReader.getCurrentEvent();
  73                 }
  74             }
  75             stop = System.nanoTime();
  76             System.out.print('.');
  77             final double time = (stop - start) / (double) nbEvent;
  78             benchs.add(time);
  79         }
  80         System.out.println("");
  81         double avg = 0;
  82         for (final Double val : benchs) {
  83             avg += val;
  84         }
  85         avg /= benchs.size();
  86         System.out.println("Time to read = " + avg + " events/ns");
  87         for (final Double val : benchs) {
  88             System.out.print(val);
  89             System.out.print(", ");
  90         }
  91
  92     }
  93
  94     /**
  95      * @param timestamp
  96      *            the timestamp in UTC to convert to nanoseconds.
  97      * @return formatted string.
  98      */
  99     private static String formatDate(final long timestamp) {
 100         final Date d = new Date(timestamp / 1000000);
 101         final DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss."); //$NON-NLS-1$
 102         final String output = df.format(d) + (timestamp % 1000000000);
 103         return output;
 104     }
 105
 106 }