globals_sparc.hpp revision 13086:1df8176488da 
1/*
2 * Copyright (c) 2000, 2017, 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#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
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.
39define_pd_global(bool, DontYieldALot,               true);  // yield no more than 100 times per second
40define_pd_global(bool, ShareVtableStubs,            false); // improves performance markedly for mtrt and compress
41define_pd_global(bool, NeedsDeoptSuspend,           true); // register window machines need this
42
43define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks
44define_pd_global(bool, TrapBasedNullChecks,         false); // Not needed on sparc.
45define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs passed to check cast
46
47define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
48define_pd_global(intx, CodeEntryAlignment,    32);
49// The default setting 16/16 seems to work best.
50// (For _228_jack 16/16 is 2% better than 4/4, 16/4, 32/32, 32/16, or 16/32.)
51define_pd_global(intx, OptoLoopAlignment,     16);  // = 4*wordSize
52define_pd_global(intx, InlineFrequencyCount,  50);  // we can use more inlining on the SPARC
53define_pd_global(intx, InlineSmallCode,       1500);
54
55#define DEFAULT_STACK_YELLOW_PAGES (2)
56#define DEFAULT_STACK_RED_PAGES (1)
57#define DEFAULT_STACK_RESERVED_PAGES (SOLARIS_ONLY(1) NOT_SOLARIS(0))
58
59define_pd_global(intx, CompilerThreadStackSize, 1024);
60define_pd_global(intx, ThreadStackSize,       1024);
61define_pd_global(intx, VMThreadStackSize,     1024);
62#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
63
64#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
65#define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
66#define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
67#define MIN_STACK_RESERVED_PAGES (0)
68
69define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
70define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
71define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
72define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
73
74define_pd_global(bool, RewriteBytecodes,     true);
75define_pd_global(bool, RewriteFrequentPairs, true);
76
77define_pd_global(bool, UseMembar,            false);
78
79define_pd_global(bool, PreserveFramePointer, false);
80
81// GC Ergo Flags
82define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // default max size of CMS young gen, per GC worker thread
83
84define_pd_global(uintx, TypeProfileLevel, 111);
85
86define_pd_global(bool, CompactStrings, true);
87
88define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
89
90#define ARCH_FLAGS(develop, \
91                   product, \
92                   diagnostic, \
93                   experimental, \
94                   notproduct, \
95                   range, \
96                   constraint, \
97                   writeable) \
98                                                                            \
99  product(intx, UseVIS, 99,                                                 \
100          "Highest supported VIS instructions set on Sparc")                \
101          range(0, 99)                                                      \
102                                                                            \
103  product(bool, UseCBCond, false,                                           \
104          "Use compare and branch instruction on SPARC")                    \
105                                                                            \
106  product(bool, UseBlockZeroing, false,                                     \
107          "Use special cpu instructions for block zeroing")                 \
108                                                                            \
109  product(intx, BlockZeroingLowLimit, 2048,                                 \
110          "Minimum size in bytes when block zeroing will be used")          \
111          range(1, max_jint)                                                \
112                                                                            \
113  product(bool, UseBlockCopy, false,                                        \
114          "Use special cpu instructions for block copy")                    \
115                                                                            \
116  product(intx, BlockCopyLowLimit, 2048,                                    \
117          "Minimum size in bytes when block copy will be used")             \
118          range(1, max_jint)                                                \
119                                                                            \
120  develop(bool, UseV8InstrsOnly, false,                                     \
121          "Use SPARC-V8 Compliant instruction subset")                      \
122                                                                            \
123  product(bool, UseNiagaraInstrs, false,                                    \
124          "Use Niagara-efficient instruction subset")                       \
125                                                                            \
126  develop(bool, UseCASForSwap, false,                                       \
127          "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
128                                                                            \
129  product(uintx,  ArraycopySrcPrefetchDistance, 0,                          \
130          "Distance to prefetch source array in arraycopy")                 \
131          constraint(ArraycopySrcPrefetchDistanceConstraintFunc, AfterErgo) \
132                                                                            \
133  product(uintx,  ArraycopyDstPrefetchDistance, 0,                          \
134          "Distance to prefetch destination array in arraycopy")            \
135          constraint(ArraycopyDstPrefetchDistanceConstraintFunc, AfterErgo) \
136
137#endif // CPU_SPARC_VM_GLOBALS_SPARC_HPP
138