Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/9000#discussion_r41560243
--- Diff:
core/src/test/scala/org/apache/spark/StaticMemoryManagerSuite.scala ---
@@ -0,0 +1,169 @@
+/*
+ * 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
+
+import scala.collection.mutable.ArrayBuffer
+
+import org.mockito.Mockito.{mock, reset, verify, when}
+import org.mockito.Matchers.{any, eq => meq}
+
+import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore,
TestBlockId}
+
+
+class StaticMemoryManagerSuite extends SparkFunSuite {
+ private val conf = new SparkConf().set("spark.storage.unrollFraction",
"0.4")
+
+ test("basic execution memory") {
+ val maxExecutionMem = 1000L
+ val (mm, _) = makeThings(maxExecutionMem, Long.MaxValue)
+ assert(mm.executionMemoryUsed === 0L)
+ assert(mm.acquireExecutionMemory(10L) === 10L)
+ assert(mm.executionMemoryUsed === 10L)
+ assert(mm.acquireExecutionMemory(100L) === 100L)
+ // Acquire up to the max
+ assert(mm.acquireExecutionMemory(1000L) === 890L)
+ assert(mm.executionMemoryUsed === 1000L)
+ assert(mm.acquireExecutionMemory(1L) === 0L)
+ assert(mm.executionMemoryUsed === 1000L)
+ mm.releaseExecutionMemory(800L)
+ assert(mm.executionMemoryUsed === 200L)
+ // Acquire after release
+ assert(mm.acquireExecutionMemory(1L) === 1L)
+ assert(mm.executionMemoryUsed === 201L)
+ // Release beyond what was acquired
+ mm.releaseExecutionMemory(maxExecutionMem)
+ assert(mm.executionMemoryUsed === 0L)
+ }
+
+ test("basic storage memory") {
+ val maxStorageMem = 1000L
+ val dummyBlock = TestBlockId("you can see the world you brought to
live")
+ val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+ val (mm, ms) = makeThings(Long.MaxValue, maxStorageMem)
+ assert(mm.storageMemoryUsed === 0L)
+ assert(mm.acquireStorageMemory(dummyBlock, 10L, dummyBlocks) === 10L)
+ // `ensureFreeSpace` should be called with the number of bytes
requested
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 10L)
+ assert(mm.storageMemoryUsed === 10L)
+ assert(dummyBlocks.isEmpty)
+ assert(mm.acquireStorageMemory(dummyBlock, 100L, dummyBlocks) === 100L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 100L)
+ // Acquire up to the max, not granted
+ assert(mm.acquireStorageMemory(dummyBlock, 1000L, dummyBlocks) === 0L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 1000L)
+ assert(mm.storageMemoryUsed === 110L)
+ assert(mm.acquireStorageMemory(dummyBlock, 890L, dummyBlocks) === 890L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 890L)
+ assert(mm.storageMemoryUsed === 1000L)
+ assert(mm.acquireStorageMemory(dummyBlock, 1L, dummyBlocks) === 0L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+ assert(mm.storageMemoryUsed === 1000L)
+ mm.releaseStorageMemory(800L)
+ assert(mm.storageMemoryUsed === 200L)
+ // Acquire after release
+ assert(mm.acquireStorageMemory(dummyBlock, 1L, dummyBlocks) === 1L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+ assert(mm.storageMemoryUsed === 201L)
+ mm.releaseStorageMemory()
+ assert(mm.storageMemoryUsed === 0L)
+ assert(mm.acquireStorageMemory(dummyBlock, 1L, dummyBlocks) === 1L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+ assert(mm.storageMemoryUsed === 1L)
+ // Release beyond what was acquired
+ mm.releaseStorageMemory(100L)
+ assert(mm.storageMemoryUsed === 0L)
+ }
+
+ test("execution and storage isolation") {
+ val maxExecutionMem = 200L
+ val maxStorageMem = 1000L
+ val dummyBlock = TestBlockId("ain't nobody love like you do")
+ val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+ val (mm, ms) = makeThings(maxExecutionMem, maxStorageMem)
+ // Only execution memory should increase
+ assert(mm.acquireExecutionMemory(100L) === 100L)
+ assert(mm.storageMemoryUsed === 0L)
+ assert(mm.executionMemoryUsed === 100L)
+ assert(mm.acquireExecutionMemory(1000L) === 100L)
+ assert(mm.storageMemoryUsed === 0L)
+ assert(mm.executionMemoryUsed === 200L)
+ // Only storage memory should increase
+ assert(mm.acquireStorageMemory(dummyBlock, 50L, dummyBlocks) === 50L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 50L)
+ assert(mm.storageMemoryUsed === 50L)
+ assert(mm.executionMemoryUsed === 200L)
+ // Only execution memory should be released
+ mm.releaseExecutionMemory(133L)
+ assert(mm.storageMemoryUsed === 50L)
+ assert(mm.executionMemoryUsed === 67L)
+ // Only storage memory should be released
+ mm.releaseStorageMemory()
+ assert(mm.storageMemoryUsed === 0L)
+ assert(mm.executionMemoryUsed === 67L)
+ }
+
+ test("unroll memory") {
+ val maxStorageMem = 1000L
+ val dummyBlock = TestBlockId("lonely water")
+ val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+ val (mm, ms) = makeThings(Long.MaxValue, maxStorageMem)
+ assert(mm.acquireUnrollMemory(dummyBlock, 100L, dummyBlocks) === 100L)
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 100L)
+ assert(mm.storageMemoryUsed === 100L)
+ mm.releaseUnrollMemory(40L)
+ assert(mm.storageMemoryUsed === 60L)
+ when(ms.currentUnrollMemory).thenReturn(60L)
+ assert(mm.acquireUnrollMemory(dummyBlock, 500L, dummyBlocks) === 500L)
+ // `spark.storage.unrollFraction` is 0.4, so the max unroll space is
400 bytes.
+ // Since we already occupy 60 bytes, we will try to ensure only 400 -
60 = 340 bytes.
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 340L)
+ assert(mm.storageMemoryUsed === 560L)
+ when(ms.currentUnrollMemory).thenReturn(560L)
+ assert(mm.acquireUnrollMemory(dummyBlock, 800L, dummyBlocks) === 0L)
+ assert(mm.storageMemoryUsed === 560L)
+ // We already have 560 bytes > the max unroll space of 400 bytes, so
no bytes are freed
+ assertEnsureFreeSpaceCalled(ms, dummyBlock, 0L)
+ // Release beyond what was acquired
+ mm.releaseUnrollMemory(maxStorageMem)
+ assert(mm.storageMemoryUsed === 0L)
+ }
+
+ /**
+ * Make a [[StaticMemoryManager]] and a [[MemoryStore]] with limited
class dependencies.
+ */
+ private def makeThings(
+ maxExecutionMem: Long,
+ maxStorageMem: Long): (StaticMemoryManager, MemoryStore) = {
+ val mm = new StaticMemoryManager(conf, maxExecutionMem, maxStorageMem)
+ val ms = mock(classOf[MemoryStore])
+ mm.setMemoryStore(ms)
+ (mm, ms)
+ }
+
+ /**
+ * Assert that [[MemoryStore.ensureFreeSpace]] is called with the given
parameters.
+ */
+ private def assertEnsureFreeSpaceCalled(
+ ms: MemoryStore,
+ blockId: BlockId,
+ numBytes: Long): Unit = {
+ verify(ms).ensureFreeSpace(meq(blockId), meq(numBytes:
java.lang.Long), any())
+ reset(ms)
--- End diff --
`reset` is usually considered an anti-pattern in Mockito, but I guess it's
okay here because although it forgets interactions _and_ stubbing you haven't
stubbed any methods on `mm`.
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