Mercurial > hg > openjdk > hsx16
changeset 675:f6da6f0174ac
6821700: tune VM flags for peak performance
Summary: Tune C2 flags default values for performance.
Reviewed-by: never, phh, iveresov, jmasa, ysr
| author | kvn |
|---|---|
| date | Mon, 30 Mar 2009 18:19:31 -0700 |
| parents | 4948e7dd28dc |
| children | d3676b4cb78c |
| files | src/cpu/sparc/vm/globals_sparc.hpp src/cpu/sparc/vm/vm_version_sparc.cpp src/cpu/x86/vm/globals_x86.hpp src/share/vm/classfile/vmSymbols.hpp src/share/vm/opto/bytecodeInfo.cpp src/share/vm/runtime/globals.hpp |
| diffstat | 6 files changed, 23 insertions(+), 6 deletions(-) [+] |
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--- a/src/cpu/sparc/vm/globals_sparc.hpp Fri Mar 27 14:37:42 2009 -0700 +++ b/src/cpu/sparc/vm/globals_sparc.hpp Mon Mar 30 18:19:31 2009 -0700 @@ -46,6 +46,7 @@ define_pd_global(uintx, NewSize, ScaleForWordSize((2048 * K) + (2 * (64 * K)))); define_pd_global(intx, SurvivorRatio, 8); define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC +define_pd_global(intx, InlineSmallCode, 1500); #ifdef _LP64 // Stack slots are 2X larger in LP64 than in the 32 bit VM. define_pd_global(intx, ThreadStackSize, 1024);
--- a/src/cpu/sparc/vm/vm_version_sparc.cpp Fri Mar 27 14:37:42 2009 -0700 +++ b/src/cpu/sparc/vm/vm_version_sparc.cpp Mon Mar 30 18:19:31 2009 -0700 @@ -62,7 +62,7 @@ if (is_niagara1()) { // Indirect branch is the same cost as direct if (FLAG_IS_DEFAULT(UseInlineCaches)) { - UseInlineCaches = false; + FLAG_SET_DEFAULT(UseInlineCaches, false); } #ifdef _LP64 // Single issue niagara1 is slower for CompressedOops @@ -79,15 +79,19 @@ #ifdef COMPILER2 // Indirect branch is the same cost as direct if (FLAG_IS_DEFAULT(UseJumpTables)) { - UseJumpTables = true; + FLAG_SET_DEFAULT(UseJumpTables, true); } // Single-issue, so entry and loop tops are // aligned on a single instruction boundary if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { - InteriorEntryAlignment = 4; + FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); } if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { - OptoLoopAlignment = 4; + FLAG_SET_DEFAULT(OptoLoopAlignment, 4); + } + if (is_niagara1_plus() && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { + // Use smaller prefetch distance on N2 + FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); } #endif } @@ -95,7 +99,7 @@ // Use hardware population count instruction if available. if (has_hardware_popc()) { if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { - UsePopCountInstruction = true; + FLAG_SET_DEFAULT(UsePopCountInstruction, true); } }
--- a/src/cpu/x86/vm/globals_x86.hpp Fri Mar 27 14:37:42 2009 -0700 +++ b/src/cpu/x86/vm/globals_x86.hpp Mon Mar 30 18:19:31 2009 -0700 @@ -60,6 +60,7 @@ define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); #endif // AMD64 define_pd_global(intx, InlineFrequencyCount, 100); +define_pd_global(intx, InlineSmallCode, 1000); define_pd_global(intx, PreInflateSpin, 10); define_pd_global(intx, StackYellowPages, 2);
--- a/src/share/vm/classfile/vmSymbols.hpp Fri Mar 27 14:37:42 2009 -0700 +++ b/src/share/vm/classfile/vmSymbols.hpp Mon Mar 30 18:19:31 2009 -0700 @@ -50,6 +50,7 @@ template(java_lang_Class, "java/lang/Class") \ template(java_lang_String, "java/lang/String") \ template(java_lang_StringValue, "java/lang/StringValue") \ + template(java_lang_StringCache, "java/lang/StringValue$StringCache") \ template(java_lang_Thread, "java/lang/Thread") \ template(java_lang_ThreadGroup, "java/lang/ThreadGroup") \ template(java_lang_Cloneable, "java/lang/Cloneable") \ @@ -286,6 +287,7 @@ template(frontCacheEnabled_name, "frontCacheEnabled") \ template(stringCacheEnabled_name, "stringCacheEnabled") \ template(bitCount_name, "bitCount") \ + template(profile_name, "profile") \ \ /* non-intrinsic name/signature pairs: */ \ template(register_method_name, "register") \
--- a/src/share/vm/opto/bytecodeInfo.cpp Fri Mar 27 14:37:42 2009 -0700 +++ b/src/share/vm/opto/bytecodeInfo.cpp Mon Mar 30 18:19:31 2009 -0700 @@ -232,6 +232,14 @@ return "disallowed by CompilerOracle"; } + if (UseStringCache) { + // Do not inline StringCache::profile() method used only at the beginning. + if (callee_method->name() == ciSymbol::profile_name() && + callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { + return "profiling method"; + } + } + return NULL; }
--- a/src/share/vm/runtime/globals.hpp Fri Mar 27 14:37:42 2009 -0700 +++ b/src/share/vm/runtime/globals.hpp Mon Mar 30 18:19:31 2009 -0700 @@ -47,6 +47,7 @@ define_pd_global(intx, OnStackReplacePercentage, 0); define_pd_global(bool, ResizeTLAB, false); define_pd_global(intx, FreqInlineSize, 0); +define_pd_global(intx, InlineSmallCode, 0); define_pd_global(intx, NewSizeThreadIncrease, 4*K); define_pd_global(intx, NewRatio, 4); define_pd_global(intx, InlineClassNatives, true); @@ -2616,7 +2617,7 @@ develop(intx, MaxRecursiveInlineLevel, 1, \ "maximum number of nested recursive calls that are inlined") \ \ - product(intx, InlineSmallCode, 1000, \ + product_pd(intx, InlineSmallCode, \ "Only inline already compiled methods if their code size is " \ "less than this") \ \