8239386: handle ContendedPaddingWidth in vm_version_aarch64

EC2 Default User · Paul Hohensee · commit e61a3ba22df2 · 2021-03-04T18:55:07.000Z
Reviewed-by: aph, phh
diff --git a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
@@ -95,6 +95,9 @@ void VM_Version::initialize() {
     SoftwarePrefetchHintDistance &= ~7;
   }
 
+  if (FLAG_IS_DEFAULT(ContendedPaddingWidth) && (dcache_line > ContendedPaddingWidth)) {
+      ContendedPaddingWidth = dcache_line;
+  }
 
   if (os::supports_map_sync()) {
     // if dcpop is available publish data cache line flush size via

Original file line number	Diff line number	Diff line change
`@@ -95,6 +95,9 @@ void VM_Version::initialize() {`
`95`	`95`	`SoftwarePrefetchHintDistance &= ~7;`
`96`	`96`	`}`
`97`	`97`
	`98`	`+ if (FLAG_IS_DEFAULT(ContendedPaddingWidth) && (dcache_line > ContendedPaddingWidth)) {`
	`99`	`+ ContendedPaddingWidth = dcache_line;`
	`100`	`+ }`
`98`	`101`
`99`	`102`	`if (os::supports_map_sync()) {`
`100`	`103`	`// if dcpop is available publish data cache line flush size via`