X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=tests%2Forg.simantics.db.tests%2Fsrc%2Forg%2Fsimantics%2Fdb%2Ftests%2Fperformance%2Fjava%2FThreadLocalTest.java;fp=tests%2Forg.simantics.db.tests%2Fsrc%2Forg%2Fsimantics%2Fdb%2Ftests%2Fperformance%2Fjava%2FThreadLocalTest.java;h=e14618f2f6da3648d9605e87a05eea356e406e50;hb=67fd62f9c742337ec80eef658192db198a0efaac;hp=0000000000000000000000000000000000000000;hpb=cde82ba81327d5515fdca362f7f4c70f5103ae80;p=simantics%2Fplatform.git

diff --git a/tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/ThreadLocalTest.java b/tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/ThreadLocalTest.java
new file mode 100644
index 000000000..e14618f2f
--- /dev/null
+++ b/tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/ThreadLocalTest.java
@@ -0,0 +1,142 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.tests.performance.java;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.simantics.db.testing.base.TestCommonPerf;
+
+
+/**
+ *
+ */
+public class ThreadLocalTest extends TestCommonPerf {
+
+	public void test() throws Exception {
+
+		final ThreadLocal<AtomicInteger> local = new ThreadLocal<AtomicInteger>();
+		
+		class CounterThread extends Thread {
+
+			final private Semaphore start;
+			final private AtomicInteger counter;
+			final private CountDownLatch latch;
+			
+			public CounterThread(Semaphore start, CountDownLatch latch, AtomicInteger counter) {
+				this.start = start;
+				this.counter = counter;
+				this.latch = latch;
+			}
+			
+			@Override
+			public void run() {
+				
+				local.set(new AtomicInteger());
+				
+				try {
+					start.acquire();
+				} catch (InterruptedException e) {
+					e.printStackTrace();
+				}
+
+				int work = 0;
+				for(int i=0;i<1000000;i++) {
+					for(int j=0;j<100;j++) local.get().incrementAndGet();
+				}
+				
+				latch.countDown();
+				
+				System.out.println("work=" + work);
+				
+			}
+			
+		}
+		
+		CountDownLatch latch = new CountDownLatch(8);
+		AtomicInteger counter = new AtomicInteger(0);
+		Semaphore starter = new Semaphore(0);
+		
+		for(int i=0;i<8;i++) new CounterThread(starter, latch, counter).start();
+		
+		Thread.sleep(500);
+
+		starter.release(8);
+		long start = System.nanoTime();
+		latch.await();
+		long duration = System.nanoTime() - start;
+
+		System.out.println("counter=" + counter.get());
+		
+		System.out.println("Finished in " + 1e-9*duration + "s.");
+		
+	}
+	
+	public void test2() throws Exception {
+
+		class CounterThread extends Thread {
+
+			final private Semaphore start;
+			final private AtomicInteger counter;
+			final private CountDownLatch latch;
+			
+			public CounterThread(Semaphore start, CountDownLatch latch, AtomicInteger counter) {
+				this.start = start;
+				this.counter = counter;
+				this.latch = latch;
+			}
+			
+			@Override
+			public void run() {
+				
+				AtomicInteger ai = new AtomicInteger();
+				
+				try {
+					start.acquire();
+				} catch (InterruptedException e) {
+					e.printStackTrace();
+				}
+
+				int work = 0;
+				for(int i=0;i<1000000;i++) {
+					for(int j=0;j<100;j++) ai.incrementAndGet();
+				}
+				
+				latch.countDown();
+				
+				System.out.println("work=" + work);
+				
+			}
+			
+		}
+		
+		CountDownLatch latch = new CountDownLatch(8);
+		AtomicInteger counter = new AtomicInteger(0);
+		Semaphore starter = new Semaphore(0);
+		
+		for(int i=0;i<8;i++) new CounterThread(starter, latch, counter).start();
+		
+		Thread.sleep(500);
+
+		starter.release(8);
+		long start = System.nanoTime();
+		latch.await();
+		long duration = System.nanoTime() - start;
+
+		System.out.println("counter=" + counter.get());
+		
+		System.out.println("Finished in " + 1e-9*duration + "s.");
+		
+	}
+
+}