Mercurial > hg > truffle
view src/cpu/x86/vm/globals_x86.hpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Thu, 20 Nov 2008 16:56:09 -0800 |
parents | a61af66fc99e |
children | f6da6f0174ac |
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/* * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * 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). * * 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. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // // Sets the default values for platform dependent flags used by the runtime system. // (see globals.hpp) // define_pd_global(bool, ConvertSleepToYield, true); define_pd_global(bool, ShareVtableStubs, true); define_pd_global(bool, CountInterpCalls, true); 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 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't // assign a different value for C2 without touching a number of files. Use // #ifdef to minimize the change as it's late in Mantis. -- FIXME. // c1 doesn't have this problem because the fix to 4858033 assures us // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns // the uep and the vep doesn't get real alignment but just slops on by // only assured that the entry instruction meets the 5 byte size requirement. #ifdef COMPILER2 define_pd_global(intx, CodeEntryAlignment, 32); #else define_pd_global(intx, CodeEntryAlignment, 16); #endif // COMPILER2 define_pd_global(bool, NeedsDeoptSuspend, false); // only register window machines need this define_pd_global(uintx, TLABSize, 0); #ifdef AMD64 define_pd_global(uintx, NewSize, ScaleForWordSize(2048 * K)); // Very large C++ stack frames using solaris-amd64 optimized builds // due to lack of optimization caused by C++ compiler bugs define_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2)); #else define_pd_global(uintx, NewSize, 1024 * K); define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); #endif // AMD64 define_pd_global(intx, InlineFrequencyCount, 100); define_pd_global(intx, PreInflateSpin, 10); define_pd_global(intx, StackYellowPages, 2); define_pd_global(intx, StackRedPages, 1); define_pd_global(bool, RewriteBytecodes, true); define_pd_global(bool, RewriteFrequentPairs, true);