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diff src/cpu/sparc/vm/vm_version_sparc.cpp @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents 28372612af5e
children d1605aabd0a1
line wrap: on
line diff
--- a/src/cpu/sparc/vm/vm_version_sparc.cpp	Fri Apr 11 09:56:35 2008 -0400
+++ b/src/cpu/sparc/vm/vm_version_sparc.cpp	Sun Apr 13 17:43:42 2008 -0400
@@ -64,6 +64,15 @@
     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)) {