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annotate src/cpu/sparc/vm/globals_sparc.hpp @ 18710:4836c2abc884
mx: removed hard-coded -Xms setting for the 'build' and 'checkstyle' commands to try and avoid unnecessary swapping on low(er) memory machines
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 18 Dec 2014 12:12:04 +1000 |
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0 | 1 /* |
17524 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef CPU_SPARC_VM_GLOBALS_SPARC_HPP |
26 #define CPU_SPARC_VM_GLOBALS_SPARC_HPP | |
27 | |
28 #include "utilities/globalDefinitions.hpp" | |
29 #include "utilities/macros.hpp" | |
30 | |
0 | 31 // Sets the default values for platform dependent flags used by the runtime system. |
32 // (see globals.hpp) | |
33 | |
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 | |
44 | |
45 define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks | |
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46 define_pd_global(bool, TrapBasedNullChecks, false); // Not needed on sparc. |
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47 define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast |
0 | 48 |
1064 | 49 define_pd_global(intx, CodeEntryAlignment, 32); |
1365 | 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 | |
1064 | 53 define_pd_global(intx, InlineFrequencyCount, 50); // we can use more inlining on the SPARC |
54 define_pd_global(intx, InlineSmallCode, 1500); | |
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55 |
0 | 56 #ifdef _LP64 |
57 // Stack slots are 2X larger in LP64 than in the 32 bit VM. | |
1064 | 58 define_pd_global(intx, ThreadStackSize, 1024); |
59 define_pd_global(intx, VMThreadStackSize, 1024); | |
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60 define_pd_global(intx, StackShadowPages, 10 DEBUG_ONLY(+1)); |
0 | 61 #else |
1064 | 62 define_pd_global(intx, ThreadStackSize, 512); |
63 define_pd_global(intx, VMThreadStackSize, 512); | |
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64 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1)); |
0 | 65 #endif |
66 | |
67 define_pd_global(intx, StackYellowPages, 2); | |
68 define_pd_global(intx, StackRedPages, 1); | |
69 | |
1064 | 70 define_pd_global(intx, PreInflateSpin, 40); // Determined by running design center |
0 | 71 |
72 define_pd_global(bool, RewriteBytecodes, true); | |
73 define_pd_global(bool, RewriteFrequentPairs, true); | |
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74 |
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75 define_pd_global(bool, UseMembar, false); |
1972 | 76 |
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77 // GC Ergo Flags |
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78 define_pd_global(uintx, CMSYoungGenPerWorker, 16*M); // default max size of CMS young gen, per GC worker thread |
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79 |
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80 define_pd_global(uintx, TypeProfileLevel, 0); |
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81 |
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82 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct) \ |
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83 \ |
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84 product(intx, UseVIS, 99, \ |
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85 "Highest supported VIS instructions set on Sparc") \ |
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86 \ |
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87 product(bool, UseCBCond, false, \ |
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88 "Use compare and branch instruction on SPARC") \ |
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89 \ |
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90 product(bool, UseBlockZeroing, false, \ |
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91 "Use special cpu instructions for block zeroing") \ |
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92 \ |
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93 product(intx, BlockZeroingLowLimit, 2048, \ |
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94 "Minimum size in bytes when block zeroing will be used") \ |
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95 \ |
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96 product(bool, UseBlockCopy, false, \ |
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97 "Use special cpu instructions for block copy") \ |
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98 \ |
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99 product(intx, BlockCopyLowLimit, 2048, \ |
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100 "Minimum size in bytes when block copy will be used") \ |
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101 \ |
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102 develop(bool, UseV8InstrsOnly, false, \ |
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103 "Use SPARC-V8 Compliant instruction subset") \ |
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104 \ |
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105 product(bool, UseNiagaraInstrs, false, \ |
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106 "Use Niagara-efficient instruction subset") \ |
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107 \ |
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108 develop(bool, UseCASForSwap, false, \ |
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109 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ |
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110 \ |
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111 product(uintx, ArraycopySrcPrefetchDistance, 0, \ |
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112 "Distance to prefetch source array in arracopy") \ |
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113 \ |
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114 product(uintx, ArraycopyDstPrefetchDistance, 0, \ |
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115 "Distance to prefetch destination array in arracopy") \ |
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116 |
1972 | 117 #endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP |