8224880: AArch64: java/javac error with AllocatePrefetchDistance
Reviewed-by: adinn
diff --git a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
index 026dd9f..b917636 100644
--- a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
+++ b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
@@ -129,8 +129,11 @@
int dcache_line = VM_Version::dcache_line_size();
+ // Limit AllocatePrefetchDistance so that it does not exceed the
+ // constraint in AllocatePrefetchDistanceConstraintFunc.
if (FLAG_IS_DEFAULT(AllocatePrefetchDistance))
- FLAG_SET_DEFAULT(AllocatePrefetchDistance, 3*dcache_line);
+ FLAG_SET_DEFAULT(AllocatePrefetchDistance, MIN2(512, 3*dcache_line));
+
if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize))
FLAG_SET_DEFAULT(AllocatePrefetchStepSize, dcache_line);
if (FLAG_IS_DEFAULT(PrefetchScanIntervalInBytes))
