duke@435: /*
trims@1907:  * Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // Sets the default values for platform dependent flags used by the runtime system.
duke@435: // (see globals.hpp)
duke@435: 
duke@435: // For sparc we do not do call backs when a thread is in the interpreter, because the
duke@435: // interpreter dispatch needs at least two instructions - first to load the dispatch address
duke@435: // in a register, and second to jmp. The swapping of the dispatch table may occur _after_
duke@435: // the load of the dispatch address and hence the jmp would still go to the location
duke@435: // according to the prior table. So, we let the thread continue and let it block by itself.
duke@435: define_pd_global(bool, DontYieldALot,               true);  // yield no more than 100 times per second
duke@435: define_pd_global(bool, ConvertSleepToYield,         false); // do not convert sleep(0) to yield. Helps GUI
duke@435: define_pd_global(bool, ShareVtableStubs,            false); // improves performance markedly for mtrt and compress
duke@435: define_pd_global(bool, CountInterpCalls,            false); // not implemented in the interpreter
duke@435: define_pd_global(bool, NeedsDeoptSuspend,           true); // register window machines need this
duke@435: 
duke@435: define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks
duke@435: define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs past to check cast
duke@435: 
phh@1499: define_pd_global(intx, CodeEntryAlignment,    32);
kvn@1800: // The default setting 16/16 seems to work best.
kvn@1800: // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
kvn@1800: define_pd_global(intx, OptoLoopAlignment,     16);  // = 4*wordSize
phh@1499: define_pd_global(intx, InlineFrequencyCount,  50);  // we can use more inlining on the SPARC
phh@1499: define_pd_global(intx, InlineSmallCode,       1500);
duke@435: #ifdef _LP64
duke@435: // Stack slots are 2X larger in LP64 than in the 32 bit VM.
phh@1499: define_pd_global(intx, ThreadStackSize,       1024);
phh@1499: define_pd_global(intx, VMThreadStackSize,     1024);
duke@435: #else
phh@1499: define_pd_global(intx, ThreadStackSize,       512);
phh@1499: define_pd_global(intx, VMThreadStackSize,     512);
duke@435: #endif
duke@435: 
duke@435: define_pd_global(intx, StackYellowPages, 2);
duke@435: define_pd_global(intx, StackRedPages, 1);
duke@435: define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
duke@435: 
phh@1499: define_pd_global(intx, PreInflateSpin,       40);  // Determined by running design center
duke@435: 
duke@435: define_pd_global(bool, RewriteBytecodes,     true);
duke@435: define_pd_global(bool, RewriteFrequentPairs, true);
bobv@2223: 
bobv@2223: define_pd_global(bool, UseMembar,            false);