jdk8-mips64-public/hotspot: src/cpu/sparc/vm/globals

6989297: Integrate additional portability improvements
Reviewed-by: vladidan, dholmes

     1 /*

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    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

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    25 // Sets the default values for platform dependent flags used by the runtime system.

    26 // (see globals.hpp)

    28 // For sparc we do not do call backs when a thread is in the interpreter, because the

    29 // interpreter dispatch needs at least two instructions - first to load the dispatch address

    30 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_

    31 // the load of the dispatch address and hence the jmp would still go to the location

    32 // according to the prior table. So, we let the thread continue and let it block by itself.

    33 define_pd_global(bool, DontYieldALot,               true);  // yield no more than 100 times per second

    34 define_pd_global(bool, ConvertSleepToYield,         false); // do not convert sleep(0) to yield. Helps GUI

    35 define_pd_global(bool, ShareVtableStubs,            false); // improves performance markedly for mtrt and compress

    36 define_pd_global(bool, CountInterpCalls,            false); // not implemented in the interpreter

    37 define_pd_global(bool, NeedsDeoptSuspend,           true); // register window machines need this

    39 define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks

    40 define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs past to check cast

    42 define_pd_global(intx, CodeEntryAlignment,    32);

    43 // The default setting 16/16 seems to work best.

    44 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)

    45 define_pd_global(intx, OptoLoopAlignment,     16);  // = 4*wordSize

    46 define_pd_global(intx, InlineFrequencyCount,  50);  // we can use more inlining on the SPARC

    47 define_pd_global(intx, InlineSmallCode,       1500);

    48 #ifdef _LP64

    49 // Stack slots are 2X larger in LP64 than in the 32 bit VM.

    50 define_pd_global(intx, ThreadStackSize,       1024);

    51 define_pd_global(intx, VMThreadStackSize,     1024);

    52 #else

    53 define_pd_global(intx, ThreadStackSize,       512);

    54 define_pd_global(intx, VMThreadStackSize,     512);

    55 #endif

    57 define_pd_global(intx, StackYellowPages, 2);

    58 define_pd_global(intx, StackRedPages, 1);

    59 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));

    61 define_pd_global(intx, PreInflateSpin,       40);  // Determined by running design center

    63 define_pd_global(bool, RewriteBytecodes,     true);

    64 define_pd_global(bool, RewriteFrequentPairs, true);

    66 define_pd_global(bool, UseMembar,            false);

src/cpu/sparc/vm/globals_sparc.hpp@3dc12ef8735e