azagrebin commented on a change in pull request #10398: [FLINK-14936][runtime]
Introduce MemoryManager#computeMemorySize to calculate managed memory size from
a fraction
URL: https://github.com/apache/flink/pull/10398#discussion_r353155241
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/memory/MemoryManagerTest.java
##########
@@ -298,6 +299,39 @@ public void testMemoryAllocationAndReservation() throws
MemoryAllocationExceptio
memoryManager.releaseAllMemory(owner2, type);
}
+ @Test
+ public void testComputeMemorySize() {
+ double fraction = 0.6;
+ assertEquals((long) (memoryManager.getMemorySize() * fraction),
memoryManager.computeMemorySize(fraction));
+
+ fraction = 1.0;
+ assertEquals((long) (memoryManager.getMemorySize() * fraction),
memoryManager.computeMemorySize(fraction));
+ }
+
+ @Test
+ public void testComputeMemorySizeInvalidFraction() {
+ try {
+ memoryManager.computeMemorySize(0.0);
Review comment:
Could we do like this instead for each case?
```
@Test(Expected = IllegalArgumentException.class)
public void testComputeMemorySizeFailForZeroFraction() {
memoryManager.computeMemorySize(0.0);
}
```
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