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src/cpu/sparc/vm/globals_sparc.hpp@710a3c8b516e
src/cpu/sparc/vm/globals_sparc.hpp
Tue, 08 Aug 2017 15:57:29 +0800
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- aoqi
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- Tue, 08 Aug 2017 15:57:29 +0800
- changeset 6876
- 710a3c8b516e
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- a9becfeecd1b
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1 /*
2 * Copyright (c) 2000, 2013, 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 */
25 #ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP
26 #define CPU_SPARC_VM_GLOBALS_SPARC_HPP
28 #include "utilities/globalDefinitions.hpp"
29 #include "utilities/macros.hpp"
31 // Sets the default values for platform dependent flags used by the runtime system.
32 // (see globals.hpp)
34 // For sparc we do not do call backs when a thread is in the interpreter, because the
35 // interpreter dispatch needs at least two instructions - first to load the dispatch address
36 // in a register, and second to jmp. The swapping of the dispatch table may occur _after_
37 // the load of the dispatch address and hence the jmp would still go to the location
38 // according to the prior table. So, we let the thread continue and let it block by itself.
39 define_pd_global(bool, DontYieldALot, true); // yield no more than 100 times per second
40 define_pd_global(bool, ConvertSleepToYield, false); // do not convert sleep(0) to yield. Helps GUI
41 define_pd_global(bool, ShareVtableStubs, false); // improves performance markedly for mtrt and compress
42 define_pd_global(bool, CountInterpCalls, false); // not implemented in the interpreter
43 define_pd_global(bool, NeedsDeoptSuspend, true); // register window machines need this
45 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks
46 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc.
47 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast
49 define_pd_global(intx, CodeEntryAlignment, 32);
50 // The default setting 16/16 seems to work best.
51 // (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
52 define_pd_global(intx, OptoLoopAlignment, 16); // = 4*wordSize
53 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC
54 define_pd_global(intx, InlineSmallCode, 1500);
56 #ifdef _LP64
57 // Stack slots are 2X larger in LP64 than in the 32 bit VM.
58 define_pd_global(intx, ThreadStackSize, 1024);
59 define_pd_global(intx, VMThreadStackSize, 1024);
60 define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1));
61 #else
62 define_pd_global(intx, ThreadStackSize, 512);
63 define_pd_global(intx, VMThreadStackSize, 512);
64 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
65 #endif
67 define_pd_global(intx, StackYellowPages, 2);
68 define_pd_global(intx, StackRedPages, 1);
70 define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center
72 define_pd_global(bool, RewriteBytecodes, true);
73 define_pd_global(bool, RewriteFrequentPairs, true);
75 define_pd_global(bool, UseMembar, false);
77 // GC Ergo Flags
78 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread
80 define_pd_global(uintx, TypeProfileLevel, 0);
82 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \
83 \
84 product(intx, UseVIS, 99, \
85 "Highest supported VIS instructions set on Sparc") \
86 \
87 product(bool, UseCBCond, false, \
88 "Use compare and branch instruction on SPARC") \
89 \
90 product(bool, UseBlockZeroing, false, \
91 "Use special cpu instructions for block zeroing") \
92 \
93 product(intx, BlockZeroingLowLimit, 2048, \
94 "Minimum size in bytes when block zeroing will be used") \
95 \
96 product(bool, UseBlockCopy, false, \
97 "Use special cpu instructions for block copy") \
98 \
99 product(intx, BlockCopyLowLimit, 2048, \
100 "Minimum size in bytes when block copy will be used") \
101 \
102 develop(bool, UseV8InstrsOnly, false, \
103 "Use SPARC-V8 Compliant instruction subset") \
104 \
105 product(bool, UseNiagaraInstrs, false, \
106 "Use Niagara-efficient instruction subset") \
107 \
108 develop(bool, UseCASForSwap, false, \
109 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
110 \
111 product(uintx, ArraycopySrcPrefetchDistance, 0, \
112 "Distance to prefetch source array in arracopy") \
113 \
114 product(uintx, ArraycopyDstPrefetchDistance, 0, \
115 "Distance to prefetch destination array in arracopy") \
117 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP
