Github user mateiz commented on a diff in the pull request:
https://github.com/apache/spark/pull/1165#discussion_r15383171
--- Diff: core/src/main/scala/org/apache/spark/storage/MemoryStore.scala ---
@@ -275,8 +426,36 @@ private class MemoryStore(blockManager: BlockManager,
maxMemory: Long)
override def contains(blockId: BlockId): Boolean = {
entries.synchronized { entries.containsKey(blockId) }
}
+
+ /**
+ * Reserve memory for unrolling blocks used by this thread.
+ */
+ private def reserveUnrollMemory(memory: Long): Unit =
putLock.synchronized {
+ unrollMemoryMap(Thread.currentThread().getId) = memory
+ }
+
+ /**
+ * Release memory used by this thread for unrolling blocks.
+ */
+ private[spark] def releaseUnrollMemory(): Unit = putLock.synchronized {
+ unrollMemoryMap.remove(Thread.currentThread().getId)
+ }
+
+ /**
+ * Return the amount of memory currently occupied for unrolling blocks
across all threads.
+ */
+ private def currentUnrollMemory: Long = putLock.synchronized {
+ unrollMemoryMap.values.sum
+ }
+
+ /**
+ * Return the amount of memory currently occupied for unrolling blocks
by this thread.
+ */
+ private def threadCurrentUnrollMemory: Long = putLock.synchronized {
--- End diff --
Maybe call it currentUnrollMemoryForThisThread or unrollMemoryForThisThread
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