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src/cpu/sparc/vm/globals_sparc.hpp

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rev 12121 : [mq]: all_changes.patch


  27 
  28 #include "utilities/globalDefinitions.hpp"
  29 #include "utilities/macros.hpp"
  30 
  31 // Sets the default values for platform dependent flags used by the runtime system.
  32 // (see globals.hpp)
  33 
  34 // For sparc we do not do call backs when a thread is in the interpreter, because the
  35 // interpreter dispatch needs at least two instructions - first to load the dispatch address
  36 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_
  37 // the load of the dispatch address and hence the jmp would still go to the location
  38 // according to the prior table. So, we let the thread continue and let it block by itself.
  39 define_pd_global(bool, DontYieldALot,               true);  // yield no more than 100 times per second
  40 define_pd_global(bool, ShareVtableStubs,            false); // improves performance markedly for mtrt and compress
  41 define_pd_global(bool, NeedsDeoptSuspend,           true); // register window machines need this
  42 
  43 define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks
  44 define_pd_global(bool, TrapBasedNullChecks,         false); // Not needed on sparc.
  45 define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs passed to check cast
  46 

  47 define_pd_global(intx, CodeEntryAlignment,    32);
  48 // The default setting 16/16 seems to work best.
  49 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
  50 define_pd_global(intx, OptoLoopAlignment,     16);  // = 4*wordSize
  51 define_pd_global(intx, InlineFrequencyCount,  50);  // we can use more inlining on the SPARC
  52 define_pd_global(intx, InlineSmallCode,       1500);
  53 
  54 #define DEFAULT_STACK_YELLOW_PAGES (2)
  55 #define DEFAULT_STACK_RED_PAGES (1)
  56 #define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0))
  57 
  58 #ifdef _LP64
  59 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
  60 define_pd_global(intx, CompilerThreadStackSize, 1024);
  61 define_pd_global(intx, ThreadStackSize,       1024);
  62 define_pd_global(intx, VMThreadStackSize,     1024);
  63 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
  64 #else
  65 define_pd_global(intx, CompilerThreadStackSize, 512);
  66 define_pd_global(intx, ThreadStackSize,       512);




  27 
  28 #include "utilities/globalDefinitions.hpp"
  29 #include "utilities/macros.hpp"
  30 
  31 // Sets the default values for platform dependent flags used by the runtime system.
  32 // (see globals.hpp)
  33 
  34 // For sparc we do not do call backs when a thread is in the interpreter, because the
  35 // interpreter dispatch needs at least two instructions - first to load the dispatch address
  36 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_
  37 // the load of the dispatch address and hence the jmp would still go to the location
  38 // according to the prior table. So, we let the thread continue and let it block by itself.
  39 define_pd_global(bool, DontYieldALot,               true);  // yield no more than 100 times per second
  40 define_pd_global(bool, ShareVtableStubs,            false); // improves performance markedly for mtrt and compress
  41 define_pd_global(bool, NeedsDeoptSuspend,           true); // register window machines need this
  42 
  43 define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks
  44 define_pd_global(bool, TrapBasedNullChecks,         false); // Not needed on sparc.
  45 define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs passed to check cast
  46 
  47 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
  48 define_pd_global(intx, CodeEntryAlignment,    32);
  49 // The default setting 16/16 seems to work best.
  50 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
  51 define_pd_global(intx, OptoLoopAlignment,     16);  // = 4*wordSize
  52 define_pd_global(intx, InlineFrequencyCount,  50);  // we can use more inlining on the SPARC
  53 define_pd_global(intx, InlineSmallCode,       1500);
  54 
  55 #define DEFAULT_STACK_YELLOW_PAGES (2)
  56 #define DEFAULT_STACK_RED_PAGES (1)
  57 #define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0))
  58 
  59 #ifdef _LP64
  60 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
  61 define_pd_global(intx, CompilerThreadStackSize, 1024);
  62 define_pd_global(intx, ThreadStackSize,       1024);
  63 define_pd_global(intx, VMThreadStackSize,     1024);
  64 #define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
  65 #else
  66 define_pd_global(intx, CompilerThreadStackSize, 512);
  67 define_pd_global(intx, ThreadStackSize,       512);


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