globals_sparc.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 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). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// Sets the default values for platform dependent flags used by the runtime system. 26// (see globals.hpp) 27 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. 33define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second 34define_pd_global(bool, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI 35define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress 36define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter 37define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this 38 39define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks 40define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs past to check cast 41 42define_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.) 45define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize 46define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC 47define_pd_global(intx, InlineSmallCode, 1500); 48#ifdef _LP64 49// Stack slots are 2X larger in LP64 than in the 32 bit VM. 50define_pd_global(intx, ThreadStackSize, 1024); 51define_pd_global(intx, VMThreadStackSize, 1024); 52#else 53define_pd_global(intx, ThreadStackSize, 512); 54define_pd_global(intx, VMThreadStackSize, 512); 55#endif 56 57define_pd_global(intx, StackYellowPages, 2); 58define_pd_global(intx, StackRedPages, 1); 59define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); 60 61define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center 62 63define_pd_global(bool, RewriteBytecodes, true); 64define_pd_global(bool, RewriteFrequentPairs, true); 65