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1 | /* |
2 | * Copyright (C) 2015, EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
da8308fe | 19 | package org.lttng.ust.agent.benchmarks.jul.handler; |
7ac7128a AM |
20 | |
21 | import java.util.LinkedList; | |
22 | import java.util.List; | |
23 | import java.util.logging.Handler; | |
24 | import java.util.logging.Level; | |
25 | import java.util.logging.Logger; | |
26 | ||
27 | import org.junit.After; | |
28 | import org.junit.Before; | |
29 | import org.junit.Test; | |
30 | ||
d4e2e87c | 31 | public abstract class JulHandlerBenchmarkBase { |
7ac7128a AM |
32 | |
33 | // ------------------------------------------------------------------------ | |
34 | // Configurable test parameters | |
35 | // ------------------------------------------------------------------------ | |
36 | ||
37 | /** Nb of runs per test, result will be averaged */ | |
38 | private static final int NB_RUNS = 10; | |
39 | ||
40 | /** Trace/log events per run */ | |
41 | private static final int NB_ITER = 100000; | |
42 | ||
43 | /** Which tests to run (for different number of threads) */ | |
44 | private static final int[] NB_THREADS = {1, 1, 2, 3, 4, 5, 6, 7, 8}; | |
45 | ||
46 | // ------------------------------------------------------------------------ | |
47 | // Attributes | |
48 | // ------------------------------------------------------------------------ | |
49 | ||
86316987 | 50 | protected Logger logger; |
7ac7128a AM |
51 | protected Handler handler; |
52 | ||
53 | // ------------------------------------------------------------------------ | |
54 | // Maintenance methods | |
55 | // ------------------------------------------------------------------------ | |
56 | ||
57 | @Before | |
58 | public void setup() { | |
59 | /* Set up the logger */ | |
60 | logger = Logger.getLogger("Test logger"); | |
61 | logger.setUseParentHandlers(false); | |
62 | logger.setLevel(Level.ALL); | |
63 | ||
64 | /* Sub-classes' @Before will setup the Handler */ | |
65 | } | |
66 | ||
67 | @After | |
68 | public void teardown() { | |
7ac7128a | 69 | if (handler != null) { |
86316987 | 70 | logger.removeHandler(handler); |
7ac7128a AM |
71 | handler.close(); |
72 | } | |
73 | handler = null; | |
74 | logger = null; | |
75 | } | |
76 | ||
77 | // ------------------------------------------------------------------------ | |
78 | // Test methods | |
79 | // ------------------------------------------------------------------------ | |
80 | ||
81 | @Test | |
82 | public void runBenchmark() { | |
83 | if (handler != null) { | |
84 | logger.addHandler(handler); | |
85 | } | |
86 | ||
87 | System.out.println(); | |
88 | System.out.println("Running benchmark: " + this.getClass().getCanonicalName()); | |
89 | for (int i : NB_THREADS) { | |
90 | runTest(logger, i); | |
91 | } | |
92 | } | |
93 | ||
94 | private static void runTest(Logger log, int nbThreads) { | |
95 | long start, end, average, total = 0; | |
96 | for (int i = 0; i < NB_RUNS; i++) { | |
97 | Runner runner = new Runner(nbThreads, NB_ITER, log); | |
98 | ||
99 | start = System.nanoTime(); | |
100 | runner.run(); | |
101 | end = System.nanoTime(); | |
102 | ||
103 | total += (end - start); | |
104 | } | |
105 | average = total / NB_RUNS; | |
106 | System.out.println(nbThreads + " threads, average = " + average / NB_ITER + " ns/event"); | |
107 | } | |
108 | ||
109 | // ------------------------------------------------------------------------ | |
110 | // Helper classes | |
111 | // ------------------------------------------------------------------------ | |
112 | ||
113 | private static class Runner implements Runnable { | |
114 | ||
115 | private final List<Worker> workers = new LinkedList<>(); | |
116 | private final List<Thread> workerThreads = new LinkedList<>(); | |
117 | ||
118 | public Runner(int nbThreads, int nbIter, Logger log) { | |
119 | ||
120 | for (int id = 0; id < nbThreads; id++) { | |
121 | Worker curWorker = new Worker(id, nbIter, log); | |
122 | workers.add(curWorker); | |
123 | workerThreads.add(new Thread(curWorker, "worker " + id)); | |
124 | } | |
125 | } | |
126 | ||
127 | @Override | |
128 | public void run() { | |
129 | for (Thread curThread : workerThreads) { | |
130 | curThread.start(); | |
131 | } | |
132 | ||
133 | for (Thread curThread : workerThreads) { | |
134 | try { | |
135 | curThread.join(); | |
136 | } catch (InterruptedException e) { | |
137 | e.printStackTrace(); | |
138 | } | |
139 | } | |
140 | } | |
141 | ||
142 | private static class Worker implements Runnable { | |
143 | ||
144 | private final Logger log; | |
145 | private final int threadId; | |
146 | private final int nbIter; | |
147 | ||
148 | public Worker(int threadId, int nbIter, Logger log) { | |
149 | this.log = log; | |
150 | this.threadId = threadId; | |
151 | this.nbIter = nbIter; | |
152 | } | |
153 | ||
154 | @Override | |
155 | public void run() { | |
156 | for (int i = 0; i < nbIter; i++) { | |
157 | log.info("Thread " + threadId + ", iteration " + i); | |
158 | } | |
159 | } | |
160 | ||
161 | } | |
162 | } | |
163 | } |