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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.memory;
import org.junit.Assert;
import org.junit.Test;
import org.apache.spark.SparkConf;
import org.apache.spark.unsafe.memory.MemoryBlock;
public class TaskMemoryManagerSuite {
@Test
public void leakedPageMemoryIsDetected() {
final TaskMemoryManager manager = new TaskMemoryManager(
new StaticMemoryManager(
new SparkConf().set("spark.memory.offHeap.enabled", "false"),
Long.MAX_VALUE,
Long.MAX_VALUE,
1),
0);
final MemoryConsumer c = new TestMemoryConsumer(manager);
manager.allocatePage(4096, c); // leak memory
Assert.assertEquals(4096, manager.getMemoryConsumptionForThisTask());
Assert.assertEquals(4096, manager.cleanUpAllAllocatedMemory());
}
@Test
public void encodePageNumberAndOffsetOffHeap() {
final SparkConf conf = new SparkConf()
.set("spark.memory.offHeap.enabled", "true")
.set("spark.memory.offHeap.size", "1000");
final TaskMemoryManager manager = new TaskMemoryManager(new TestMemoryManager(conf), 0);
final MemoryConsumer c = new TestMemoryConsumer(manager, MemoryMode.OFF_HEAP);
final MemoryBlock dataPage = manager.allocatePage(256, c);
// In off-heap mode, an offset is an absolute address that may require more than 51 bits to
// encode. This test exercises that corner-case:
final long offset = ((1L << TaskMemoryManager.OFFSET_BITS) + 10);
final long encodedAddress = manager.encodePageNumberAndOffset(dataPage, offset);
Assert.assertEquals(null, manager.getPage(encodedAddress));
Assert.assertEquals(offset, manager.getOffsetInPage(encodedAddress));
}
@Test
public void encodePageNumberAndOffsetOnHeap() {
final TaskMemoryManager manager = new TaskMemoryManager(
new TestMemoryManager(new SparkConf().set("spark.memory.offHeap.enabled", "false")), 0);
final MemoryConsumer c = new TestMemoryConsumer(manager, MemoryMode.ON_HEAP);
final MemoryBlock dataPage = manager.allocatePage(256, c);
final long encodedAddress = manager.encodePageNumberAndOffset(dataPage, 64);
Assert.assertEquals(dataPage.getBaseObject(), manager.getPage(encodedAddress));
Assert.assertEquals(64, manager.getOffsetInPage(encodedAddress));
}
@Test
public void cooperativeSpilling() {
final TestMemoryManager memoryManager = new TestMemoryManager(new SparkConf());
memoryManager.limit(100);
final TaskMemoryManager manager = new TaskMemoryManager(memoryManager, 0);
TestMemoryConsumer c1 = new TestMemoryConsumer(manager);
TestMemoryConsumer c2 = new TestMemoryConsumer(manager);
c1.use(100);
Assert.assertEquals(100, c1.getUsed());
c2.use(100);
Assert.assertEquals(100, c2.getUsed());
Assert.assertEquals(0, c1.getUsed()); // spilled
c1.use(100);
Assert.assertEquals(100, c1.getUsed());
Assert.assertEquals(0, c2.getUsed()); // spilled
c1.use(50);
Assert.assertEquals(50, c1.getUsed()); // spilled
Assert.assertEquals(0, c2.getUsed());
c2.use(50);
Assert.assertEquals(50, c1.getUsed());
Assert.assertEquals(50, c2.getUsed());
c1.use(100);
Assert.assertEquals(100, c1.getUsed());
Assert.assertEquals(0, c2.getUsed()); // spilled
c1.free(20);
Assert.assertEquals(80, c1.getUsed());
c2.use(10);
Assert.assertEquals(80, c1.getUsed());
Assert.assertEquals(10, c2.getUsed());
c2.use(100);
Assert.assertEquals(100, c2.getUsed());
Assert.assertEquals(0, c1.getUsed()); // spilled
c1.free(0);
c2.free(100);
Assert.assertEquals(0, manager.cleanUpAllAllocatedMemory());
}
@Test
public void shouldNotForceSpillingInDifferentModes() {
final TestMemoryManager memoryManager = new TestMemoryManager(new SparkConf());
memoryManager.limit(100);
final TaskMemoryManager manager = new TaskMemoryManager(memoryManager, 0);
TestMemoryConsumer c1 = new TestMemoryConsumer(manager, MemoryMode.ON_HEAP);
TestMemoryConsumer c2 = new TestMemoryConsumer(manager, MemoryMode.OFF_HEAP);
c1.use(80);
Assert.assertEquals(80, c1.getUsed());
c2.use(80);
Assert.assertEquals(20, c2.getUsed()); // not enough memory
Assert.assertEquals(80, c1.getUsed()); // not spilled
c2.use(10);
Assert.assertEquals(10, c2.getUsed()); // spilled
Assert.assertEquals(80, c1.getUsed()); // not spilled
}
@Test
public void offHeapConfigurationBackwardsCompatibility() {
// Tests backwards-compatibility with the old `spark.unsafe.offHeap` configuration, which
// was deprecated in Spark 1.6 and replaced by `spark.memory.offHeap.enabled` (see SPARK-12251).
final SparkConf conf = new SparkConf()
.set("spark.unsafe.offHeap", "true")
.set("spark.memory.offHeap.size", "1000");
final TaskMemoryManager manager = new TaskMemoryManager(new TestMemoryManager(conf), 0);
Assert.assertSame(MemoryMode.OFF_HEAP, manager.tungstenMemoryMode);
}
}
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