Added missing org.simantics.db.{tests,testing} plug-ins.

[simantics/platform.git] / tests / org.simantics.db.tests / src / org / simantics / db / tests / performance / java / SynchronizedAccessTest.java

diff --git a/tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/SynchronizedAccessTest.java b/tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/SynchronizedAccessTest.java
new file mode 100644 (file)
index 0000000..f1ab3e1
--- /dev/null
+++ b/tests/org.simantics.db.tests/src/org/simantics/db/tests/performance/java/SynchronizedAccessTest.java
@@ -0,0 +1,191 @@
+/*******************************************************************************
+ * 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 gnu.trove.map.hash.TIntIntHashMap;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import org.simantics.db.testing.base.TestCommonPerf;
+
+
+public class SynchronizedAccessTest extends TestCommonPerf {
+
+       public void perform3(int threads) throws InterruptedException {
+
+               final Lock lock = new ReentrantLock(false);
+               final TIntIntHashMap map = new TIntIntHashMap();
+               
+               class CounterThread extends Thread {
+
+                       final private int index;
+                       final private Semaphore start;
+                       final private CountDownLatch latch;
+                       
+                       public CounterThread(int index, Semaphore start, CountDownLatch latch) {
+                               this.index = index;
+                               this.start = start;
+                               this.latch = latch;
+                       }
+                       
+                       @Override
+                       public void run() {
+                               
+                               try {
+                                       start.acquire();
+                               } catch (InterruptedException e) {
+                                       e.printStackTrace();
+                               }
+                               
+                               for(int i=0;i<1000000;i++) {
+                                       lock.lock();
+                                       map.put(i, i);
+                                       lock.unlock();
+                               }
+                               
+                               latch.countDown();
+                               
+                       }
+                       
+               }
+               
+               CountDownLatch latch = new CountDownLatch(threads);
+               Semaphore starter = new Semaphore(0);
+               
+               for(int i=0;i<threads;i++) new CounterThread(i, starter, latch).start();
+               
+               Thread.sleep(500);
+               
+               starter.release(threads);
+               long start = System.nanoTime();
+               latch.await();
+               long duration = System.nanoTime() - start;
+               System.err.println("took " + 1e-9*duration);
+               
+       }
+
+       public void perform2(int threads) throws InterruptedException {
+
+               final TIntIntHashMap map = new TIntIntHashMap();
+               
+               class CounterThread extends Thread {
+
+                       final private int index;
+                       final private Semaphore start;
+                       final private CountDownLatch latch;
+                       
+                       public CounterThread(int index, Semaphore start, CountDownLatch latch) {
+                               this.index = index;
+                               this.start = start;
+                               this.latch = latch;
+                       }
+                       
+                       @Override
+                       public void run() {
+                               
+                               try {
+                                       start.acquire();
+                               } catch (InterruptedException e) {
+                                       e.printStackTrace();
+                               }
+                               
+                               for(int i=0;i<1000000;i++) {
+                                       synchronized(map) {
+                                               map.put(i, i);
+                                       }
+                               }
+                               
+                               latch.countDown();
+                               
+                       }
+                       
+               }
+               
+               CountDownLatch latch = new CountDownLatch(threads);
+               Semaphore starter = new Semaphore(0);
+               
+               for(int i=0;i<threads;i++) new CounterThread(i, starter, latch).start();
+               
+               Thread.sleep(500);
+               
+               starter.release(threads);
+               long start = System.nanoTime();
+               latch.await();
+               long duration = System.nanoTime() - start;
+               System.err.println("took " + 1e-9*duration);
+               
+       }
+
+       public void perform(int threads) throws InterruptedException {
+
+               class CounterThread extends Thread {
+
+                       final private int index;
+                       final private Semaphore start;
+                       final private CountDownLatch latch;
+                       
+                       public CounterThread(int index, Semaphore start, CountDownLatch latch) {
+                               this.index = index;
+                               this.start = start;
+                               this.latch = latch;
+                       }
+                       
+                       @Override
+                       public void run() {
+                               
+                               try {
+                                       start.acquire();
+                               } catch (InterruptedException e) {
+                                       e.printStackTrace();
+                               }
+
+                               final TIntIntHashMap map = new TIntIntHashMap();
+                               
+                               for(int i=0;i<1000000;i++) {
+                                       synchronized(map) {
+                                               map.put(i, i);
+                                       }
+                               }
+                               
+                               latch.countDown();
+                               
+                       }
+                       
+               }
+               
+               CountDownLatch latch = new CountDownLatch(threads);
+               Semaphore starter = new Semaphore(0);
+               
+               for(int i=0;i<threads;i++) new CounterThread(i, starter, latch).start();
+               
+               Thread.sleep(500);
+               
+               starter.release(threads);
+               long start = System.nanoTime();
+               latch.await();
+               long duration = System.nanoTime() - start;
+               System.err.println("took " + 1e-9*duration);
+               
+       }
+       
+       public void test() throws Exception {
+
+               for(int i=0;i<5;i++) perform(4);
+               for(int i=0;i<5;i++) perform2(4);
+               for(int i=0;i<5;i++) perform3(4);
+               
+       }
+
+}