Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10170#discussion_r47028931
--- Diff:
core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala ---
@@ -154,32 +177,34 @@ class UnifiedMemoryManagerSuite extends
MemoryManagerSuite with PrivateMethodTes
assert(mm.acquireExecutionMemory(800L, taskAttemptId,
MemoryMode.ON_HEAP) === 800L)
assert(mm.executionMemoryUsed === 800L)
assert(mm.storageMemoryUsed === 0L)
- assertEnsureFreeSpaceNotCalled(ms)
+ assertEvictBlocksToFreeSpaceNotCalled(ms)
// Storage should not be able to evict execution
assert(mm.acquireStorageMemory(dummyBlock, 100L, evictedBlocks))
assert(mm.executionMemoryUsed === 800L)
assert(mm.storageMemoryUsed === 100L)
- assertEnsureFreeSpaceCalled(ms, 100L)
+ assertEvictBlocksToFreeSpaceNotCalled(ms)
assert(!mm.acquireStorageMemory(dummyBlock, 250L, evictedBlocks))
assert(mm.executionMemoryUsed === 800L)
assert(mm.storageMemoryUsed === 100L)
- assertEnsureFreeSpaceCalled(ms, 250L)
+ assertEvictBlocksToFreeSpaceCalled(ms, 150L) // try to evict blocks ...
--- End diff --
If you take my suggestion from above about adding the preemptive check,
then this will not be called. (i.e. we know there's only 100B of blocks so
don't bother trying to free 150B out of it)
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