Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vm_version_sparc.cpp @ 2396:b868d9928221
Merge
author | twisti |
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date | Thu, 24 Mar 2011 23:04:40 -0700 |
parents | c04052fd6ae1 |
children | faa472957b38 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 #include "precompiled.hpp" |
26 #include "assembler_sparc.inline.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "runtime/java.hpp" | |
29 #include "runtime/stubCodeGenerator.hpp" | |
30 #include "vm_version_sparc.hpp" | |
31 #ifdef TARGET_OS_FAMILY_linux | |
32 # include "os_linux.inline.hpp" | |
33 #endif | |
34 #ifdef TARGET_OS_FAMILY_solaris | |
35 # include "os_solaris.inline.hpp" | |
36 #endif | |
0 | 37 |
38 int VM_Version::_features = VM_Version::unknown_m; | |
39 const char* VM_Version::_features_str = ""; | |
40 | |
41 void VM_Version::initialize() { | |
42 _features = determine_features(); | |
43 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); | |
44 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); | |
45 PrefetchFieldsAhead = prefetch_fields_ahead(); | |
46 | |
47 // Allocation prefetch settings | |
48 intx cache_line_size = L1_data_cache_line_size(); | |
49 if( cache_line_size > AllocatePrefetchStepSize ) | |
50 AllocatePrefetchStepSize = cache_line_size; | |
51 if( FLAG_IS_DEFAULT(AllocatePrefetchLines) ) | |
52 AllocatePrefetchLines = 3; // Optimistic value | |
53 assert( AllocatePrefetchLines > 0, "invalid value"); | |
54 if( AllocatePrefetchLines < 1 ) // set valid value in product VM | |
55 AllocatePrefetchLines = 1; // Conservative value | |
56 | |
57 AllocatePrefetchDistance = allocate_prefetch_distance(); | |
58 AllocatePrefetchStyle = allocate_prefetch_style(); | |
59 | |
60 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); | |
61 | |
62 UseSSE = 0; // Only on x86 and x64 | |
63 | |
64 _supports_cx8 = has_v9(); | |
65 | |
2080 | 66 if (is_niagara()) { |
0 | 67 // Indirect branch is the same cost as direct |
68 if (FLAG_IS_DEFAULT(UseInlineCaches)) { | |
675 | 69 FLAG_SET_DEFAULT(UseInlineCaches, false); |
0 | 70 } |
2080 | 71 // Align loops on a single instruction boundary. |
72 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { | |
73 FLAG_SET_DEFAULT(OptoLoopAlignment, 4); | |
74 } | |
75 // When using CMS, we cannot use memset() in BOT updates because | |
76 // the sun4v/CMT version in libc_psr uses BIS which exposes | |
77 // "phantom zeros" to concurrent readers. See 6948537. | |
78 if (FLAG_IS_DEFAULT(UseMemSetInBOT) && UseConcMarkSweepGC) { | |
79 FLAG_SET_DEFAULT(UseMemSetInBOT, false); | |
80 } | |
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81 #ifdef _LP64 |
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82 // 32-bit oops don't make sense for the 64-bit VM on sparc |
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83 // since the 32-bit VM has the same registers and smaller objects. |
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84 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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85 #endif // _LP64 |
0 | 86 #ifdef COMPILER2 |
87 // Indirect branch is the same cost as direct | |
88 if (FLAG_IS_DEFAULT(UseJumpTables)) { | |
675 | 89 FLAG_SET_DEFAULT(UseJumpTables, true); |
0 | 90 } |
91 // Single-issue, so entry and loop tops are | |
92 // aligned on a single instruction boundary | |
93 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { | |
675 | 94 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); |
0 | 95 } |
2080 | 96 if (is_niagara_plus()) { |
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97 if (has_blk_init() && AllocatePrefetchStyle > 0 && |
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98 FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { |
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99 // Use BIS instruction for allocation prefetch. |
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100 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3); |
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101 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
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102 // Use smaller prefetch distance on N2 with BIS |
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103 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); |
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104 } |
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105 } |
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106 if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
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107 // Use different prefetch distance without BIS |
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108 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); |
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109 } |
0 | 110 } |
111 #endif | |
112 } | |
113 | |
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114 // Use hardware population count instruction if available. |
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115 if (has_hardware_popc()) { |
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116 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { |
675 | 117 FLAG_SET_DEFAULT(UsePopCountInstruction, true); |
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118 } |
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119 } |
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120 |
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121 #ifdef COMPILER2 |
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122 // Currently not supported anywhere. |
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123 FLAG_SET_DEFAULT(UseFPUForSpilling, false); |
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124 #endif |
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125 |
0 | 126 char buf[512]; |
2080 | 127 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
0 | 128 (has_v8() ? ", has_v8" : ""), |
129 (has_v9() ? ", has_v9" : ""), | |
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130 (has_hardware_popc() ? ", popc" : ""), |
0 | 131 (has_vis1() ? ", has_vis1" : ""), |
132 (has_vis2() ? ", has_vis2" : ""), | |
2080 | 133 (has_vis3() ? ", has_vis3" : ""), |
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134 (has_blk_init() ? ", has_blk_init" : ""), |
0 | 135 (is_ultra3() ? ", is_ultra3" : ""), |
136 (is_sun4v() ? ", is_sun4v" : ""), | |
2080 | 137 (is_niagara() ? ", is_niagara" : ""), |
138 (is_niagara_plus() ? ", is_niagara_plus" : ""), | |
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139 (is_sparc64() ? ", is_sparc64" : ""), |
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140 (!has_hardware_mul32() ? ", no-mul32" : ""), |
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141 (!has_hardware_div32() ? ", no-div32" : ""), |
0 | 142 (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); |
143 | |
144 // buf is started with ", " or is empty | |
145 _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf); | |
146 | |
147 #ifndef PRODUCT | |
148 if (PrintMiscellaneous && Verbose) { | |
149 tty->print("Allocation: "); | |
150 if (AllocatePrefetchStyle <= 0) { | |
151 tty->print_cr("no prefetching"); | |
152 } else { | |
153 if (AllocatePrefetchLines > 1) { | |
154 tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); | |
155 } else { | |
156 tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance); | |
157 } | |
158 } | |
159 if (PrefetchCopyIntervalInBytes > 0) { | |
160 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); | |
161 } | |
162 if (PrefetchScanIntervalInBytes > 0) { | |
163 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); | |
164 } | |
165 if (PrefetchFieldsAhead > 0) { | |
166 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); | |
167 } | |
168 } | |
169 #endif // PRODUCT | |
170 } | |
171 | |
172 void VM_Version::print_features() { | |
173 tty->print_cr("Version:%s", cpu_features()); | |
174 } | |
175 | |
176 int VM_Version::determine_features() { | |
177 if (UseV8InstrsOnly) { | |
178 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) | |
179 return generic_v8_m; | |
180 } | |
181 | |
182 int features = platform_features(unknown_m); // platform_features() is os_arch specific | |
183 | |
184 if (features == unknown_m) { | |
185 features = generic_v9_m; | |
186 warning("Cannot recognize SPARC version. Default to V9"); | |
187 } | |
188 | |
2080 | 189 assert(is_T_family(features) == is_niagara(features), "Niagara should be T series"); |
190 if (UseNiagaraInstrs) { // Force code generation for Niagara | |
191 if (is_T_family(features)) { | |
0 | 192 // Happy to accomodate... |
193 } else { | |
194 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) | |
2080 | 195 features |= T_family_m; |
0 | 196 } |
197 } else { | |
2080 | 198 if (is_T_family(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { |
0 | 199 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) |
2080 | 200 features &= ~(T_family_m | T1_model_m); |
0 | 201 } else { |
202 // Happy to accomodate... | |
203 } | |
204 } | |
205 | |
206 return features; | |
207 } | |
208 | |
209 static int saved_features = 0; | |
210 | |
211 void VM_Version::allow_all() { | |
212 saved_features = _features; | |
213 _features = all_features_m; | |
214 } | |
215 | |
216 void VM_Version::revert() { | |
217 _features = saved_features; | |
218 } | |
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219 |
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220 unsigned int VM_Version::calc_parallel_worker_threads() { |
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221 unsigned int result; |
2080 | 222 if (is_niagara_plus()) { |
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223 result = nof_parallel_worker_threads(5, 16, 8); |
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224 } else { |
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225 result = nof_parallel_worker_threads(5, 8, 8); |
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226 } |
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227 return result; |
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228 } |