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diff src/share/vm/memory/universe.cpp @ 1571:2d127394260e

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6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb Summary: Added new product ObjectAlignmentInBytes flag to control object alignment. Reviewed-by: twisti, ysr, iveresov
author kvn
date Thu, 27 May 2010 18:01:56 -0700
parents cd5dbf694d45
children e9ff18c4ace7
line wrap: on
line diff
--- a/src/share/vm/memory/universe.cpp	Thu May 27 09:54:07 2010 -0700
+++ b/src/share/vm/memory/universe.cpp	Thu May 27 18:01:56 2010 -0700
@@ -748,7 +748,7 @@
 // 4Gb
 static const uint64_t NarrowOopHeapMax = (uint64_t(max_juint) + 1);
 // 32Gb
-static const uint64_t OopEncodingHeapMax = NarrowOopHeapMax << LogMinObjAlignmentInBytes;
+// OopEncodingHeapMax == NarrowOopHeapMax << LogMinObjAlignmentInBytes;
 
 char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
   size_t base = 0;
@@ -1261,7 +1261,7 @@
 
   // decide which low-order bits we require to be clear:
   size_t alignSize = MinObjAlignmentInBytes;
-  size_t min_object_size = oopDesc::header_size();
+  size_t min_object_size = CollectedHeap::min_fill_size();
 
   // make an inclusive limit:
   uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize;