Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vm_version_sparc.cpp @ 2049:7e09ea4a8f36
Added leaf method assumptions.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Mon, 10 Jan 2011 16:59:48 +0100 |
parents | f95d63e2154a |
children | c04052fd6ae1 |
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 | |
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41 bool VM_Version::is_niagara1_plus() { |
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42 // This is a placeholder until the real test is determined. |
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43 return is_niagara1() && |
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44 (os::processor_count() > maximum_niagara1_processor_count()); |
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45 } |
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46 |
0 | 47 void VM_Version::initialize() { |
48 _features = determine_features(); | |
49 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); | |
50 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); | |
51 PrefetchFieldsAhead = prefetch_fields_ahead(); | |
52 | |
53 // Allocation prefetch settings | |
54 intx cache_line_size = L1_data_cache_line_size(); | |
55 if( cache_line_size > AllocatePrefetchStepSize ) | |
56 AllocatePrefetchStepSize = cache_line_size; | |
57 if( FLAG_IS_DEFAULT(AllocatePrefetchLines) ) | |
58 AllocatePrefetchLines = 3; // Optimistic value | |
59 assert( AllocatePrefetchLines > 0, "invalid value"); | |
60 if( AllocatePrefetchLines < 1 ) // set valid value in product VM | |
61 AllocatePrefetchLines = 1; // Conservative value | |
62 | |
63 AllocatePrefetchDistance = allocate_prefetch_distance(); | |
64 AllocatePrefetchStyle = allocate_prefetch_style(); | |
65 | |
66 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); | |
67 | |
68 UseSSE = 0; // Only on x86 and x64 | |
69 | |
70 _supports_cx8 = has_v9(); | |
71 | |
72 if (is_niagara1()) { | |
73 // Indirect branch is the same cost as direct | |
74 if (FLAG_IS_DEFAULT(UseInlineCaches)) { | |
675 | 75 FLAG_SET_DEFAULT(UseInlineCaches, false); |
0 | 76 } |
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77 #ifdef _LP64 |
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78 // 32-bit oops don't make sense for the 64-bit VM on sparc |
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79 // since the 32-bit VM has the same registers and smaller objects. |
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80 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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81 #endif // _LP64 |
0 | 82 #ifdef COMPILER2 |
83 // Indirect branch is the same cost as direct | |
84 if (FLAG_IS_DEFAULT(UseJumpTables)) { | |
675 | 85 FLAG_SET_DEFAULT(UseJumpTables, true); |
0 | 86 } |
87 // Single-issue, so entry and loop tops are | |
88 // aligned on a single instruction boundary | |
89 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { | |
675 | 90 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); |
0 | 91 } |
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92 if (is_niagara1_plus()) { |
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93 if (has_blk_init() && AllocatePrefetchStyle > 0 && |
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94 FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { |
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95 // Use BIS instruction for allocation prefetch. |
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96 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3); |
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97 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
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98 // Use smaller prefetch distance on N2 with BIS |
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99 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); |
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100 } |
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101 } |
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102 if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
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103 // Use different prefetch distance without BIS |
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104 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); |
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105 } |
0 | 106 } |
107 #endif | |
1365 | 108 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { |
109 FLAG_SET_DEFAULT(OptoLoopAlignment, 4); | |
110 } | |
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111 // When using CMS, we cannot use memset() in BOT updates because |
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112 // the sun4v/CMT version in libc_psr uses BIS which exposes |
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113 // "phantom zeros" to concurrent readers. See 6948537. |
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114 if (FLAG_IS_DEFAULT(UseMemSetInBOT) && UseConcMarkSweepGC) { |
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115 FLAG_SET_DEFAULT(UseMemSetInBOT, false); |
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116 } |
0 | 117 } |
118 | |
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119 // Use hardware population count instruction if available. |
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120 if (has_hardware_popc()) { |
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121 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { |
675 | 122 FLAG_SET_DEFAULT(UsePopCountInstruction, true); |
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123 } |
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124 } |
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125 |
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126 #ifdef COMPILER2 |
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127 // Currently not supported anywhere. |
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128 FLAG_SET_DEFAULT(UseFPUForSpilling, false); |
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129 #endif |
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130 |
0 | 131 char buf[512]; |
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132 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s%s%s", |
0 | 133 (has_v8() ? ", has_v8" : ""), |
134 (has_v9() ? ", has_v9" : ""), | |
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135 (has_hardware_popc() ? ", popc" : ""), |
0 | 136 (has_vis1() ? ", has_vis1" : ""), |
137 (has_vis2() ? ", has_vis2" : ""), | |
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138 (has_blk_init() ? ", has_blk_init" : ""), |
0 | 139 (is_ultra3() ? ", is_ultra3" : ""), |
140 (is_sun4v() ? ", is_sun4v" : ""), | |
141 (is_niagara1() ? ", is_niagara1" : ""), | |
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142 (is_niagara1_plus() ? ", is_niagara1_plus" : ""), |
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143 (is_sparc64() ? ", is_sparc64" : ""), |
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144 (!has_hardware_mul32() ? ", no-mul32" : ""), |
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145 (!has_hardware_div32() ? ", no-div32" : ""), |
0 | 146 (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); |
147 | |
148 // buf is started with ", " or is empty | |
149 _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf); | |
150 | |
151 #ifndef PRODUCT | |
152 if (PrintMiscellaneous && Verbose) { | |
153 tty->print("Allocation: "); | |
154 if (AllocatePrefetchStyle <= 0) { | |
155 tty->print_cr("no prefetching"); | |
156 } else { | |
157 if (AllocatePrefetchLines > 1) { | |
158 tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); | |
159 } else { | |
160 tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance); | |
161 } | |
162 } | |
163 if (PrefetchCopyIntervalInBytes > 0) { | |
164 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); | |
165 } | |
166 if (PrefetchScanIntervalInBytes > 0) { | |
167 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); | |
168 } | |
169 if (PrefetchFieldsAhead > 0) { | |
170 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); | |
171 } | |
172 } | |
173 #endif // PRODUCT | |
174 } | |
175 | |
176 void VM_Version::print_features() { | |
177 tty->print_cr("Version:%s", cpu_features()); | |
178 } | |
179 | |
180 int VM_Version::determine_features() { | |
181 if (UseV8InstrsOnly) { | |
182 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) | |
183 return generic_v8_m; | |
184 } | |
185 | |
186 int features = platform_features(unknown_m); // platform_features() is os_arch specific | |
187 | |
188 if (features == unknown_m) { | |
189 features = generic_v9_m; | |
190 warning("Cannot recognize SPARC version. Default to V9"); | |
191 } | |
192 | |
193 if (UseNiagaraInstrs) { | |
194 if (is_niagara1(features)) { | |
195 // Happy to accomodate... | |
196 } else { | |
197 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) | |
198 features = niagara1_m; | |
199 } | |
200 } else { | |
201 if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { | |
202 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) | |
203 features &= ~niagara1_unique_m; | |
204 } else { | |
205 // Happy to accomodate... | |
206 } | |
207 } | |
208 | |
209 return features; | |
210 } | |
211 | |
212 static int saved_features = 0; | |
213 | |
214 void VM_Version::allow_all() { | |
215 saved_features = _features; | |
216 _features = all_features_m; | |
217 } | |
218 | |
219 void VM_Version::revert() { | |
220 _features = saved_features; | |
221 } | |
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222 |
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223 unsigned int VM_Version::calc_parallel_worker_threads() { |
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224 unsigned int result; |
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225 if (is_niagara1_plus()) { |
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226 result = nof_parallel_worker_threads(5, 16, 8); |
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227 } else { |
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228 result = nof_parallel_worker_threads(5, 8, 8); |
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229 } |
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230 return result; |
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231 } |