zentol commented on a change in pull request #10341: [FLINK-14974][runtime]
Calculate managed memory fractions with BigDecimal and round down it properly
URL: https://github.com/apache/flink/pull/10341#discussion_r351862080
##########
File path:
flink-streaming-java/src/test/java/org/apache/flink/streaming/api/graph/StreamingJobGraphGeneratorTest.java
##########
@@ -680,17 +683,31 @@ public void
testManagedMemoryFractionForSpecifiedResourceSpec() throws Exception
final JobVertex vertex3 =
jobGraph.getVerticesSortedTopologicallyFromSources().get(2);
final StreamConfig sourceConfig = new
StreamConfig(vertex1.getConfiguration());
- assertEquals(0.1,
sourceConfig.getManagedMemoryFractionOnHeap(), 0.000001);
- assertEquals(0.4,
sourceConfig.getManagedMemoryFractionOffHeap(), 0.000001);
+ assertEquals(100.0 / 1100,
sourceConfig.getManagedMemoryFractionOnHeap(), 0.000001);
+ assertEquals(40.0 / 110,
sourceConfig.getManagedMemoryFractionOffHeap(), 0.000001);
final StreamConfig map1Config = Iterables.getOnlyElement(
sourceConfig.getTransitiveChainedTaskConfigs(StreamingJobGraphGeneratorTest.class.getClassLoader()).values());
- assertEquals(0.3, map1Config.getManagedMemoryFractionOnHeap(),
0.000001);
- assertEquals(0.5, map1Config.getManagedMemoryFractionOffHeap(),
0.000001);
+ assertEquals(300.0 / 1100,
map1Config.getManagedMemoryFractionOnHeap(), 0.000001);
+ assertEquals(60.0 / 110,
map1Config.getManagedMemoryFractionOffHeap(), 0.000001);
final StreamConfig map2Config = new
StreamConfig(vertex2.getConfiguration());
- assertEquals(0.6, map2Config.getManagedMemoryFractionOnHeap(),
0.000001);
- assertEquals(0.1, map2Config.getManagedMemoryFractionOffHeap(),
0.000001);
+ assertEquals(700.0 / 1100,
map2Config.getManagedMemoryFractionOnHeap(), 0.000001);
+ assertEquals(10.0 / 110,
map2Config.getManagedMemoryFractionOffHeap(), 0.000001);
+
+ final double remainingFractionOnHeap = BigDecimal.ONE
+
.subtract(BigDecimal.valueOf(sourceConfig.getManagedMemoryFractionOnHeap()))
Review comment:
intuitively I expected us to add the fractions here. doing it via
subtraction seems like a roundabout way of doing it.
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