8061281: Microbenchmark suite build support, directory layout and sample benchmarks

8061282: Migrate jmh-jdk-microbenchmarks into the JDK Co-authored-by: Magnus Ihse Bursie <magnus.ihse.bursie@oracle.com> Co-authored-by: Erik Joelsson <erik.joelsson@oracle.com> Co-authored-by: Staffan Friberg <sfriberg@kth.se> Reviewed-by: ecaspole, mchung, erikj, ihse
2025-08-28 15:24:43 +02:00 · 2018-11-16 23:39:51 +01:00 · 2018-11-16 23:39:51 +01:00 · 7a30c97753
commit 7a30c97753
parent 14b7467279
247 changed files with 26097 additions and 13 deletions
--- a/test/micro/org/openjdk/bench/java/lang/ThreadStartJoin.java
+++ b/test/micro/org/openjdk/bench/java/lang/ThreadStartJoin.java
@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.openjdk.bench.java.lang;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.TearDown;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Test to launch and gather threads. Measure time for different parts.
+ */
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.MICROSECONDS)
+@State(Scope.Benchmark)
+public class ThreadStartJoin {
+
+    private static final int THREADS = Runtime.getRuntime().availableProcessors();
+
+    private Thread[] ts;
+
+    @Benchmark
+    public void test() throws InterruptedException {
+        ts = new TestThread[THREADS];
+
+        for (int i = 0; i < THREADS; i++) {
+            ts[i] = new TestThread();
+        }
+
+        for (int i = 0; i < THREADS; i++) {
+            ts[i].start();
+        }
+
+        for (Thread mythread : ts) {
+            mythread.join();
+
+            if (mythread.isAlive()) {
+                throw new IllegalStateException("Couldn't join in time in LPHhello.");
+            }
+        }
+    }
+
+    @TearDown
+    public final void cleanup() {
+        if (ts != null) {
+            for (Thread t : ts) {
+                if (t != null) {
+                    t.interrupt();
+                }
+            }
+            ts = null;
+        }
+    }
+
+    static final class TestThread extends Thread {
+        private static int num = 0;
+
+        public TestThread() {
+            super(TestThread.name());
+        }
+
+        private synchronized static String name() {
+            return "TestThread-" + num++;
+        }
+
+        public void run() {
+            // do nothing
+        }
+
+    }
+
+}