26 #define CPU_SPARC_VM_GLOBALS_SPARC_HPP
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, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI
41 define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
42 define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter
43 define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
44
45 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
46 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast
47
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 #ifdef _LP64
56 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
57 define_pd_global(intx, ThreadStackSize, 1024);
58 define_pd_global(intx, VMThreadStackSize, 1024);
59 define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1));
60 #else
61 define_pd_global(intx, ThreadStackSize, 512);
62 define_pd_global(intx, VMThreadStackSize, 512);
63 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
64 #endif
65
66 define_pd_global(intx, StackYellowPages, 2);
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26 #define CPU_SPARC_VM_GLOBALS_SPARC_HPP
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, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI
41 define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
42 define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter
43 define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
44
45 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
46 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc.
47 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast
48
49 define_pd_global(intx, CodeEntryAlignment, 32);
50 // The default setting 16/16 seems to work best.
51 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
52 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
53 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
54 define_pd_global(intx, InlineSmallCode, 1500);
55
56 #ifdef _LP64
57 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
58 define_pd_global(intx, ThreadStackSize, 1024);
59 define_pd_global(intx, VMThreadStackSize, 1024);
60 define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1));
61 #else
62 define_pd_global(intx, ThreadStackSize, 512);
63 define_pd_global(intx, VMThreadStackSize, 512);
64 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
65 #endif
66
67 define_pd_global(intx, StackYellowPages, 2);
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