globals_sparc.hpp revision 1472
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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, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
// 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.)
#ifdef _LP64
// Stack slots are 2X larger in LP64 than in the 32 bit VM.
#else
#endif
define_pd_global(bool, RewriteBytecodes, true);
define_pd_global(bool, RewriteFrequentPairs, true);