org.eclipse.linuxtools.tmf.core.tests/perf/org/eclipse/linuxtools/tmf/core/tests/perf/synchronization/TimestampTransformBenchmark.java

   1 /*******************************************************************************
   2  * Copyright (c) 2014 École Polytechnique de Montréal
   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  *   Francis Giraldeau - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.core.tests.perf.synchronization;
  14
  15 import org.eclipse.linuxtools.tmf.core.synchronization.ITmfTimestampTransform;
  16 import org.eclipse.linuxtools.tmf.core.synchronization.TimestampTransformFactory;
  17 import org.eclipse.test.performance.Dimension;
  18 import org.eclipse.test.performance.Performance;
  19 import org.eclipse.test.performance.PerformanceMeter;
  20 import org.junit.Test;
  21
  22 /**
  23  * Test the performance of linear transforms classes
  24  *
  25  * @author Francis Giraldeau
  26  */
  27 public class TimestampTransformBenchmark {
  28
  29     private static final String TEST_ID = "org.eclipse.linuxtools#Trace synchronization#";
  30     private static final String TEST_SUMMARY = "Timestamp Transform: ";
  31
  32     /** Number of transformations done for each transform: 50 millions */
  33     private static final long NB_TRANSFORMATIONS = 50000000L;
  34
  35     /**
  36      * Test the timestamp transform performances
  37      */
  38     @Test
  39     public void testTimestampTransformPerformance() {
  40         ITmfTimestampTransform transform = TimestampTransformFactory.getDefaultTransform();
  41         doTimestampTransformRun("Identity transform", transform, 10);
  42
  43         transform = TimestampTransformFactory.createWithOffset(123456789);
  44         doTimestampTransformRun("Transform with offset", transform, 10);
  45
  46         transform = TimestampTransformFactory.createLinear(Math.PI, 1234);
  47         doTimestampTransformRun("Linear transform", transform, 5);
  48
  49         transform = TimestampTransformFactory.createLinear(10000.1234545565635, -4312278758437L);
  50         doTimestampTransformRun("Linear transform with larger slope and negative offset", transform, 5);
  51     }
  52
  53     private static void doTimestampTransformRun(String testName, ITmfTimestampTransform xform, long loopCount) {
  54         Performance perf = Performance.getDefault();
  55         PerformanceMeter pm = perf.createPerformanceMeter(TEST_ID + testName);
  56         perf.tagAsSummary(pm, TEST_SUMMARY + testName, Dimension.CPU_TIME);
  57
  58         for (int x = 0; x < loopCount; x++) {
  59             /**
  60              * We use timestamps with values in the order of 10^18, which about
  61              * corresponds to timestamps in nanoseconds since epoch
  62              */
  63             long time = (long) Math.pow(10, 18);
  64             pm.start();
  65             /**
  66              * Apply the timestamp transform NB_TRANSFORMATIONS times, with
  67              * timestamps incremented by 200 each time
  68              */
  69             for (long i = 0; i < NB_TRANSFORMATIONS; i++) {
  70                 xform.transform(time);
  71                 time += 200;
  72             }
  73             pm.stop();
  74         }
  75         pm.commit();
  76     }
  77
  78 }