| 1 | package org.lttng.ust.tests; |
| 2 | |
| 3 | import java.io.IOException; |
| 4 | import java.util.logging.FileHandler; |
| 5 | import java.util.logging.Handler; |
| 6 | import java.util.logging.Level; |
| 7 | import java.util.logging.Logger; |
| 8 | import java.util.logging.SimpleFormatter; |
| 9 | |
| 10 | import org.lttng.ust.LTTngUst; |
| 11 | |
| 12 | public class Benchmark { |
| 13 | |
| 14 | /** Nb of runs per test, result will be averaged */ |
| 15 | private static final int NB_RUNS = 5; |
| 16 | |
| 17 | /** Trace/log events per run */ |
| 18 | private static final int NB_ITER = 1000000; |
| 19 | |
| 20 | /** Which tests to run (for different number of threads) */ |
| 21 | private static final int[] nbThreads = {1, 1, 2, 3, 4, 5, 6, 7, 8}; |
| 22 | |
| 23 | private static Runner runner; |
| 24 | private static Logger log; |
| 25 | |
| 26 | public static void main(String[] args) throws SecurityException, IOException { |
| 27 | |
| 28 | final Handler fh; |
| 29 | |
| 30 | /* Set up the logger */ |
| 31 | log = Logger.getLogger("Test logger"); |
| 32 | log.setUseParentHandlers(false); |
| 33 | fh = new FileHandler("/tmp/log", false); |
| 34 | fh.setFormatter(new SimpleFormatter()); |
| 35 | // log.addHandler(fh); |
| 36 | log.setLevel(Level.ALL); |
| 37 | |
| 38 | /* Set up the tracer */ |
| 39 | LTTngUst.init(); |
| 40 | System.out.println("Press a key to start."); |
| 41 | System.in.read(); |
| 42 | |
| 43 | for (int i : nbThreads) { |
| 44 | runTest(i); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | |
| 49 | private static void runTest(int nbThreads) throws SecurityException, IOException { |
| 50 | long start, end, average, total = 0; |
| 51 | for (int i = 0; i < NB_RUNS; i++) { |
| 52 | runner = new Runner(nbThreads, NB_ITER, log); |
| 53 | |
| 54 | start = System.nanoTime(); |
| 55 | runner.run(); |
| 56 | end = System.nanoTime(); |
| 57 | |
| 58 | total += (end - start); |
| 59 | } |
| 60 | average = total / NB_RUNS; |
| 61 | System.out.println(nbThreads + " threads, average = " + average / NB_ITER + " ns/event"); |
| 62 | } |
| 63 | } |