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comparison src/os/linux/vm/os_linux.cpp @ 642:660978a2a31a

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6791178: Specialize for zero as the compressed oop vm heap base Summary: 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
author kvn
date Thu, 12 Mar 2009 10:37:46 -0700
parents 773234c55e8c
children bd441136a5ce
comparison
equal deleted inserted replaced
641:6af0a709d52b 642:660978a2a31a
2580 2580
2581 #ifndef SHM_HUGETLB 2581 #ifndef SHM_HUGETLB
2582 #define SHM_HUGETLB 04000 2582 #define SHM_HUGETLB 04000
2583 #endif 2583 #endif
2584 2584
2585 char* os::reserve_memory_special(size_t bytes) { 2585 char* os::reserve_memory_special(size_t bytes, char* req_addr) {
2586 assert(UseLargePages, "only for large pages"); 2586 assert(UseLargePages, "only for large pages");
2587 2587
2588 key_t key = IPC_PRIVATE; 2588 key_t key = IPC_PRIVATE;
2589 char *addr; 2589 char *addr;
2590 2590