viirya commented on a change in pull request #25985: [SPARK-29310][CORE][TESTS]
TestMemoryManager should implement getExecutionMemoryUsageForTask()
URL: https://github.com/apache/spark/pull/25985#discussion_r330254944
##########
File path: core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
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@@ -17,60 +17,110 @@
package org.apache.spark.memory
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.mutable
+
import org.apache.spark.SparkConf
import org.apache.spark.storage.BlockId
class TestMemoryManager(conf: SparkConf)
extends MemoryManager(conf, numCores = 1, Long.MaxValue, Long.MaxValue) {
+ @GuardedBy("this")
+ private var consequentOOM = 0
+ @GuardedBy("this")
+ private var available = Long.MaxValue
+ @GuardedBy("this")
+ private val memoryForTask = mutable.HashMap[Long,
Long]().withDefaultValue(0L)
+
override private[memory] def acquireExecutionMemory(
numBytes: Long,
taskAttemptId: Long,
- memoryMode: MemoryMode): Long = {
- if (consequentOOM > 0) {
- consequentOOM -= 1
- 0
- } else if (available >= numBytes) {
- available -= numBytes
- numBytes
- } else {
- val grant = available
- available = 0
- grant
+ memoryMode: MemoryMode): Long = synchronized {
+ require(numBytes >= 0)
+ val acquired = {
+ if (consequentOOM > 0) {
+ consequentOOM -= 1
+ 0
+ } else if (available >= numBytes) {
+ available -= numBytes
+ numBytes
+ } else {
+ val grant = available
+ available = 0
+ grant
+ }
}
+ memoryForTask(taskAttemptId) = memoryForTask.getOrElse(taskAttemptId, 0L)
+ acquired
+ acquired
+ }
+
+ override private[memory] def releaseExecutionMemory(
+ numBytes: Long,
+ taskAttemptId: Long,
+ memoryMode: MemoryMode): Unit = synchronized {
+ require(numBytes >= 0)
+ available += numBytes
+ val existingMemoryUsage = memoryForTask.getOrElse(taskAttemptId, 0L)
+ val newMemoryUsage = existingMemoryUsage - numBytes
+ require(
+ newMemoryUsage >= 0,
+ s"Attempting to free $numBytes of memory for task attempt
$taskAttemptId, but it only " +
+ s"allocated $existingMemoryUsage bytes of memory")
+ memoryForTask(taskAttemptId) = newMemoryUsage
+ }
+
+ override private[memory] def releaseAllExecutionMemoryForTask(taskAttemptId:
Long): Long = {
+ memoryForTask.remove(taskAttemptId).getOrElse(0L)
+ }
+
+ override private[memory] def getExecutionMemoryUsageForTask(taskAttemptId:
Long): Long = {
+ memoryForTask.getOrElse(taskAttemptId, 0L)
}
+
override def acquireStorageMemory(
blockId: BlockId,
numBytes: Long,
- memoryMode: MemoryMode): Boolean = true
+ memoryMode: MemoryMode): Boolean = {
+ require(numBytes >= 0)
+ true
+ }
+
override def acquireUnrollMemory(
blockId: BlockId,
numBytes: Long,
- memoryMode: MemoryMode): Boolean = true
- override def releaseStorageMemory(numBytes: Long, memoryMode: MemoryMode):
Unit = {}
- override private[memory] def releaseExecutionMemory(
- numBytes: Long,
- taskAttemptId: Long,
- memoryMode: MemoryMode): Unit = {
- available += numBytes
+ memoryMode: MemoryMode): Boolean = {
+ require(numBytes >= 0)
+ true
}
+
+ override def releaseStorageMemory(numBytes: Long, memoryMode: MemoryMode):
Unit = {
+ require(numBytes >= 0)
+ }
+
override def maxOnHeapStorageMemory: Long = Long.MaxValue
override def maxOffHeapStorageMemory: Long = 0L
- private var consequentOOM = 0
- private var available = Long.MaxValue
-
+ /**
+ * Causes the next call to [[acquireExecutionMemory()]] to fail to allocate
+ * memory (returning `0`), , simulating low-on-memory / out-of-memory
conditions.
Review comment:
nit: double ,
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