globals_sparc.hpp revision 844:bd02caa94611 
1/*
2 * Copyright 2000-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25//
26// Sets the default values for platform dependent flags used by the runtime system.
27// (see globals.hpp)
28//
29
30// For sparc we do not do call backs when a thread is in the interpreter, because the
31// interpreter dispatch needs at least two instructions - first to load the dispatch address
32// in a register, and second to jmp. The swapping of the dispatch table may occur _after_
33// the load of the dispatch address and hence the jmp would still go to the location
34// according to the prior table. So, we let the thread continue and let it block by itself.
35define_pd_global(bool, DontYieldALot,               true);  // yield no more than 100 times per second
36define_pd_global(bool, ConvertSleepToYield,         false); // do not convert sleep(0) to yield. Helps GUI
37define_pd_global(bool, ShareVtableStubs,            false); // improves performance markedly for mtrt and compress
38define_pd_global(bool, CountInterpCalls,            false); // not implemented in the interpreter
39define_pd_global(bool, NeedsDeoptSuspend,           true); // register window machines need this
40
41define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks
42define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs past to check cast
43
44define_pd_global(intx,  CodeEntryAlignment,    32);
45define_pd_global(uintx, TLABSize,              0);
46define_pd_global(uintx, NewSize, ScaleForWordSize((2048 * K) + (2 * (64 * K))));
47define_pd_global(intx,  SurvivorRatio,         8);
48define_pd_global(intx,  InlineFrequencyCount,  50);  // we can use more inlining on the SPARC
49define_pd_global(intx,  InlineSmallCode,       1500);
50#ifdef _LP64
51// Stack slots are 2X larger in LP64 than in the 32 bit VM.
52define_pd_global(intx,  ThreadStackSize,       1024);
53define_pd_global(intx,  VMThreadStackSize,     1024);
54#else
55define_pd_global(intx,  ThreadStackSize,       512);
56define_pd_global(intx,  VMThreadStackSize,     512);
57#endif
58
59define_pd_global(intx, StackYellowPages, 2);
60define_pd_global(intx, StackRedPages, 1);
61define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
62
63define_pd_global(intx,  PreInflateSpin,        40);  // Determined by running design center
64
65define_pd_global(bool, RewriteBytecodes,     true);
66define_pd_global(bool, RewriteFrequentPairs, true);
67