archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-20 02:54:35 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb

Browse source 
Added new product ObjectAlignmentInBytes flag to control object alignment.

Reviewed-by: twisti, ysr, iveresov
This commit is contained in:
Vladimir Kozlov 2010-05-27 18:01:56 -07:00
parent 05b4f2e796
commit cc18a50e59
29 changed files with 222 additions and 136 deletions
Download patch file Download diff file Expand all files Collapse all files

4
hotspot/src/share/vm/memory/universe.cpp
View file

@ -748,7 +748,7 @@ jint universe_init() {
// 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 @@ static void calculate_verify_data(uintptr_t verify_data[2],
// 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;