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6791178: Specialize for zero as the compressed oop vm heap base

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Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb.

Reviewed-by: never, twisti, jcoomes, coleenp
This commit is contained in:
Vladimir Kozlov 2009-03-12 10:37:46 -07:00
parent 66cecec230
commit 69f9ddee90
45 changed files with 1072 additions and 220 deletions
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2
hotspot/src/os/linux/vm/os_linux.cpp
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@ -2582,7 +2582,7 @@ bool os::large_page_init() {
#define SHM_HUGETLB 04000
#endif
char* os::reserve_memory_special(size_t bytes) {
char* os::reserve_memory_special(size_t bytes, char* req_addr) {
assert(UseLargePages, "only for large pages");
key_t key = IPC_PRIVATE;