@Test(timeout = 5 * 60 * 1000)
public void testJNIMemoryManagerHeapExpansion() {
LinkedList<RefCountedTester> heldRefs = new LinkedList<RefCountedTester>();
JNIMemoryManager mgr = JNIMemoryManager.getMgr();
mgr.flush();
mgr.setMinimumReferencesToCache(1024);
int maxItems = 10000;
// 10000 should cause several heap expansions to occur
for (int i = 0; i < maxItems; i++) {
heldRefs.add(RefCountedTester.make());
}
assertEquals("didn't pin as many as it should", maxItems, mgr.getNumPinnedObjects());
// now release them.
heldRefs.clear();
while (mgr.getNumPinnedObjects() != 0) {
MemoryTestHelper.forceJavaHeapWeakReferenceClear();
// Do a collection
mgr.gc(true);
}
assertEquals("didn't pin as many as it should", 0, mgr.getNumPinnedObjects());
// this should cause the heap to shrink, and then grow
for (int i = 0; i < maxItems / 2; i++) {
heldRefs.add(RefCountedTester.make());
}
assertEquals("didn't pin as many as it should", maxItems / 2, mgr.getNumPinnedObjects());
// now release them.
heldRefs.clear();
// and force a collection
while (mgr.getNumPinnedObjects() != 0) {
MemoryTestHelper.forceJavaHeapWeakReferenceClear();
// Do a collection
mgr.gc(true);
}
assertEquals("didn't pin as many as it should", 0, mgr.getNumPinnedObjects());
}
@Test
public void testCopyReferenceLoadTest() {
assertEquals(0, JNIMemoryManager.getMgr().getNumPinnedObjects());
RefCounted obj = RefCountedTester.make();
for (int i = 0; i < 100000; i++) {
RefCounted copy = obj.copyReference();
copy.delete();
}
obj.delete();
assertEquals(0, JNIMemoryManager.getMgr().getNumPinnedObjects());
}
@Test
public void testCopyReferenceLoadTestMultiThreaded() throws InterruptedException {
assertEquals(0, JNIMemoryManager.getMgr().getNumPinnedObjects());
final RefCounted obj = RefCountedTester.make();
final int NUM_THREADS = 100;
final int NUM_ITERS = 10000;
final AtomicBoolean start = new AtomicBoolean(false);
Thread[] threads = new Thread[NUM_THREADS];
for (int i = 0; i < threads.length; i++) {
threads[i] =
new Thread(
new Runnable() {
public void run() {
synchronized (start) {
while (!start.get())
try {
start.wait();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
// System.out.println("Thread started:
// "+Thread.currentThread().getName());
for (int i = 0; i < NUM_ITERS; i++) {
RefCounted copy = obj.copyReference();
copy.delete();
}
}
},
"thread_" + i);
}
for (int i = 0; i < threads.length; i++) {
threads[i].start();
}
synchronized (start) {
start.set(true);
start.notifyAll();
}
for (int i = 0; i < threads.length; i++) {
threads[i].join();
// System.out.println("Thread finished: "+threads[i].getName());
}
obj.delete();
assertEquals(0, JNIMemoryManager.getMgr().getNumPinnedObjects());
}
@Test(timeout = 60 * 1000)
public void testReferenceCountingLoadTestOfDeath() throws InterruptedException {
assertEquals(
"should be no objects for collection", 0, JNIReference.getMgr().getNumPinnedObjects());
RefCountedTester obj = RefCountedTester.make();
for (int i = 0; i < 1000; i++) {
RefCountedTester copy = obj.copyReference();
assertNotNull("could not copy reference", copy);
}
obj = null;
// Force a java collection
while (JNIReference.getMgr().getNumPinnedObjects() > 0)
MemoryTestHelper.forceJavaHeapWeakReferenceClear();
assertEquals("Looks like we leaked an object", 0, JNIReference.getMgr().getNumPinnedObjects());
}