| 1 | package org.lttng.ust.agent.jul.benchmarks.handler; |
| 2 | |
| 3 | import java.util.LinkedList; |
| 4 | import java.util.List; |
| 5 | import java.util.logging.Handler; |
| 6 | import java.util.logging.Level; |
| 7 | import java.util.logging.Logger; |
| 8 | |
| 9 | import org.junit.After; |
| 10 | import org.junit.Before; |
| 11 | import org.junit.Test; |
| 12 | |
| 13 | public abstract class AbstractJulBenchmark { |
| 14 | |
| 15 | // ------------------------------------------------------------------------ |
| 16 | // Configurable test parameters |
| 17 | // ------------------------------------------------------------------------ |
| 18 | |
| 19 | /** Nb of runs per test, result will be averaged */ |
| 20 | private static final int NB_RUNS = 10; |
| 21 | |
| 22 | /** Trace/log events per run */ |
| 23 | private static final int NB_ITER = 100000; |
| 24 | |
| 25 | /** Which tests to run (for different number of threads) */ |
| 26 | private static final int[] NB_THREADS = {1, 1, 2, 3, 4, 5, 6, 7, 8}; |
| 27 | |
| 28 | // ------------------------------------------------------------------------ |
| 29 | // Attributes |
| 30 | // ------------------------------------------------------------------------ |
| 31 | |
| 32 | protected Logger logger; |
| 33 | protected Handler handler; |
| 34 | |
| 35 | // ------------------------------------------------------------------------ |
| 36 | // Maintenance methods |
| 37 | // ------------------------------------------------------------------------ |
| 38 | |
| 39 | @Before |
| 40 | public void setup() { |
| 41 | /* Set up the logger */ |
| 42 | logger = Logger.getLogger("Test logger"); |
| 43 | logger.setUseParentHandlers(false); |
| 44 | logger.setLevel(Level.ALL); |
| 45 | |
| 46 | /* Sub-classes' @Before will setup the Handler */ |
| 47 | } |
| 48 | |
| 49 | @After |
| 50 | public void teardown() { |
| 51 | if (handler != null) { |
| 52 | logger.removeHandler(handler); |
| 53 | handler.close(); |
| 54 | } |
| 55 | handler = null; |
| 56 | logger = null; |
| 57 | } |
| 58 | |
| 59 | // ------------------------------------------------------------------------ |
| 60 | // Test methods |
| 61 | // ------------------------------------------------------------------------ |
| 62 | |
| 63 | @Test |
| 64 | public void runBenchmark() { |
| 65 | if (handler != null) { |
| 66 | logger.addHandler(handler); |
| 67 | } |
| 68 | |
| 69 | System.out.println(); |
| 70 | System.out.println("Running benchmark: " + this.getClass().getCanonicalName()); |
| 71 | for (int i : NB_THREADS) { |
| 72 | runTest(logger, i); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | private static void runTest(Logger log, int nbThreads) { |
| 77 | long start, end, average, total = 0; |
| 78 | for (int i = 0; i < NB_RUNS; i++) { |
| 79 | Runner runner = new Runner(nbThreads, NB_ITER, log); |
| 80 | |
| 81 | start = System.nanoTime(); |
| 82 | runner.run(); |
| 83 | end = System.nanoTime(); |
| 84 | |
| 85 | total += (end - start); |
| 86 | } |
| 87 | average = total / NB_RUNS; |
| 88 | System.out.println(nbThreads + " threads, average = " + average / NB_ITER + " ns/event"); |
| 89 | } |
| 90 | |
| 91 | // ------------------------------------------------------------------------ |
| 92 | // Helper classes |
| 93 | // ------------------------------------------------------------------------ |
| 94 | |
| 95 | private static class Runner implements Runnable { |
| 96 | |
| 97 | private final List<Worker> workers = new LinkedList<>(); |
| 98 | private final List<Thread> workerThreads = new LinkedList<>(); |
| 99 | |
| 100 | public Runner(int nbThreads, int nbIter, Logger log) { |
| 101 | |
| 102 | for (int id = 0; id < nbThreads; id++) { |
| 103 | Worker curWorker = new Worker(id, nbIter, log); |
| 104 | workers.add(curWorker); |
| 105 | workerThreads.add(new Thread(curWorker, "worker " + id)); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | @Override |
| 110 | public void run() { |
| 111 | for (Thread curThread : workerThreads) { |
| 112 | curThread.start(); |
| 113 | } |
| 114 | |
| 115 | for (Thread curThread : workerThreads) { |
| 116 | try { |
| 117 | curThread.join(); |
| 118 | } catch (InterruptedException e) { |
| 119 | e.printStackTrace(); |
| 120 | } |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | private static class Worker implements Runnable { |
| 125 | |
| 126 | private final Logger log; |
| 127 | private final int threadId; |
| 128 | private final int nbIter; |
| 129 | |
| 130 | public Worker(int threadId, int nbIter, Logger log) { |
| 131 | this.log = log; |
| 132 | this.threadId = threadId; |
| 133 | this.nbIter = nbIter; |
| 134 | } |
| 135 | |
| 136 | @Override |
| 137 | public void run() { |
| 138 | for (int i = 0; i < nbIter; i++) { |
| 139 | log.info("Thread " + threadId + ", iteration " + i); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | } |
| 144 | } |
| 145 | } |