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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv

Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
This commit is contained in:
Coleen Phillimore 2008-04-13 17:43:42 -04:00
parent 680ecf1611
commit 4a831d45f0
273 changed files with 6585 additions and 2993 deletions
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9
hotspot/src/cpu/sparc/vm/vm_version_sparc.cpp
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@ -64,6 +64,15 @@ void VM_Version::initialize() {
if (FLAG_IS_DEFAULT(UseInlineCaches)) {
UseInlineCaches = false;
}
#ifdef _LP64
// Single issue niagara1 is slower for CompressedOops
// but niagaras after that it's fine.
if (!is_niagara1_plus()) {
if (FLAG_IS_DEFAULT(UseCompressedOops)) {
FLAG_SET_ERGO(bool, UseCompressedOops, false);
}
}
#endif // _LP64
#ifdef COMPILER2
// Indirect branch is the same cost as direct
if (FLAG_IS_DEFAULT(UseJumpTables)) {