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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.shuffle.unsafe;
import org.junit.Test;
import static org.junit.Assert.*;
import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
import org.apache.spark.unsafe.memory.MemoryAllocator;
import org.apache.spark.unsafe.memory.MemoryBlock;
import org.apache.spark.unsafe.memory.TaskMemoryManager;
import static org.apache.spark.shuffle.unsafe.PackedRecordPointer.*;
public class PackedRecordPointerSuite {
@Test
public void heap() {
final TaskMemoryManager memoryManager =
new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
final MemoryBlock page0 = memoryManager.allocatePage(128);
final MemoryBlock page1 = memoryManager.allocatePage(128);
final long addressInPage1 = memoryManager.encodePageNumberAndOffset(page1,
page1.getBaseOffset() + 42);
PackedRecordPointer packedPointer = new PackedRecordPointer();
packedPointer.set(PackedRecordPointer.packPointer(addressInPage1, 360));
assertEquals(360, packedPointer.getPartitionId());
final long recordPointer = packedPointer.getRecordPointer();
assertEquals(1, TaskMemoryManager.decodePageNumber(recordPointer));
assertEquals(page1.getBaseOffset() + 42, memoryManager.getOffsetInPage(recordPointer));
assertEquals(addressInPage1, recordPointer);
memoryManager.cleanUpAllAllocatedMemory();
}
@Test
public void offHeap() {
final TaskMemoryManager memoryManager =
new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.UNSAFE));
final MemoryBlock page0 = memoryManager.allocatePage(128);
final MemoryBlock page1 = memoryManager.allocatePage(128);
final long addressInPage1 = memoryManager.encodePageNumberAndOffset(page1,
page1.getBaseOffset() + 42);
PackedRecordPointer packedPointer = new PackedRecordPointer();
packedPointer.set(PackedRecordPointer.packPointer(addressInPage1, 360));
assertEquals(360, packedPointer.getPartitionId());
final long recordPointer = packedPointer.getRecordPointer();
assertEquals(1, TaskMemoryManager.decodePageNumber(recordPointer));
assertEquals(page1.getBaseOffset() + 42, memoryManager.getOffsetInPage(recordPointer));
assertEquals(addressInPage1, recordPointer);
memoryManager.cleanUpAllAllocatedMemory();
}
@Test
public void maximumPartitionIdCanBeEncoded() {
PackedRecordPointer packedPointer = new PackedRecordPointer();
packedPointer.set(PackedRecordPointer.packPointer(0, MAXIMUM_PARTITION_ID));
assertEquals(MAXIMUM_PARTITION_ID, packedPointer.getPartitionId());
}
@Test
public void partitionIdsGreaterThanMaximumPartitionIdWillOverflowOrTriggerError() {
PackedRecordPointer packedPointer = new PackedRecordPointer();
try {
// Pointers greater than the maximum partition ID will overflow or trigger an assertion error
packedPointer.set(PackedRecordPointer.packPointer(0, MAXIMUM_PARTITION_ID + 1));
assertFalse(MAXIMUM_PARTITION_ID + 1 == packedPointer.getPartitionId());
} catch (AssertionError e ) {
// pass
}
}
@Test
public void maximumOffsetInPageCanBeEncoded() {
PackedRecordPointer packedPointer = new PackedRecordPointer();
long address = TaskMemoryManager.encodePageNumberAndOffset(0, MAXIMUM_PAGE_SIZE_BYTES - 1);
packedPointer.set(PackedRecordPointer.packPointer(address, 0));
assertEquals(address, packedPointer.getRecordPointer());
}
@Test
public void offsetsPastMaxOffsetInPageWillOverflow() {
PackedRecordPointer packedPointer = new PackedRecordPointer();
long address = TaskMemoryManager.encodePageNumberAndOffset(0, MAXIMUM_PAGE_SIZE_BYTES);
packedPointer.set(PackedRecordPointer.packPointer(address, 0));
assertEquals(0, packedPointer.getRecordPointer());
}
}
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