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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * This code is free software; you can redistribute it and/or modify it

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 * published by the Free Software Foundation.

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 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

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

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

 * accompanied this code).

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 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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

// (see globals.hpp)

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

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

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

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

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

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

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

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

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

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

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

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

define_pd_global(intx, CodeEntryAlignment,    32);

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

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

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

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);

define_pd_global(intx, VMThreadStackSize,     1024);

#else

define_pd_global(intx, ThreadStackSize,       512);

define_pd_global(intx, VMThreadStackSize,     512);

#endif

define_pd_global(intx, StackYellowPages, 2);

define_pd_global(intx, StackRedPages, 1);

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

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

define_pd_global(bool, RewriteBytecodes,     true);

define_pd_global(bool, RewriteFrequentPairs, true);