Disable periodic full GCs for compacting GC.

peter-hofer · peter-hofer · commit 62dab60b3e24 · 2025-03-26T13:00:00.000+01:00
diff --git a/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/AdaptiveCollectionPolicy.java b/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/AdaptiveCollectionPolicy.java
@@ -189,7 +189,8 @@ public boolean shouldCollectCompletely(boolean followingIncrementalCollection) {
             return false;
         }
 
-        if (minorCountSinceMajorCollection * avgMinorPause.getAverage() >= CONSECUTIVE_MINOR_TO_MAJOR_COLLECTION_PAUSE_TIME_RATIO * avgMajorPause.getPaddedAverage()) {
+        if (!SerialGCOptions.useCompactingOldGen() &&
+                        minorCountSinceMajorCollection * avgMinorPause.getAverage() >= CONSECUTIVE_MINOR_TO_MAJOR_COLLECTION_PAUSE_TIME_RATIO * avgMajorPause.getPaddedAverage()) {
             /*
              * When we do many incremental collections in a row because they reclaim sufficient
              * space, still trigger a complete collection when reaching a cumulative pause time

Original file line number	Diff line number	Diff line change
`@@ -189,7 +189,8 @@ public boolean shouldCollectCompletely(boolean followingIncrementalCollection) {`
`189`	`189`	`return false;`
`190`	`190`	`}`
`191`	`191`
`192`		`- if (minorCountSinceMajorCollection * avgMinorPause.getAverage() >= CONSECUTIVE_MINOR_TO_MAJOR_COLLECTION_PAUSE_TIME_RATIO * avgMajorPause.getPaddedAverage()) {`
	`192`	`+ if (!SerialGCOptions.useCompactingOldGen() &&`
	`193`	`+ minorCountSinceMajorCollection * avgMinorPause.getAverage() >= CONSECUTIVE_MINOR_TO_MAJOR_COLLECTION_PAUSE_TIME_RATIO * avgMajorPause.getPaddedAverage()) {`
`193`	`194`	`/*`
`194`	`195`	`* When we do many incremental collections in a row because they reclaim sufficient`
`195`	`196`	`* space, still trigger a complete collection when reaching a cumulative pause time`