Mercurial > hg > graal-jvmci-8
annotate src/cpu/sparc/vm/vm_version_sparc.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
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date | Thu, 27 May 2010 19:08:38 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2009, 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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_vm_version_sparc.cpp.incl" | |
27 | |
28 int VM_Version::_features = VM_Version::unknown_m; | |
29 const char* VM_Version::_features_str = ""; | |
30 | |
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31 bool VM_Version::is_niagara1_plus() { |
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32 // This is a placeholder until the real test is determined. |
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33 return is_niagara1() && |
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34 (os::processor_count() > maximum_niagara1_processor_count()); |
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35 } |
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36 |
0 | 37 void VM_Version::initialize() { |
38 _features = determine_features(); | |
39 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); | |
40 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); | |
41 PrefetchFieldsAhead = prefetch_fields_ahead(); | |
42 | |
43 // Allocation prefetch settings | |
44 intx cache_line_size = L1_data_cache_line_size(); | |
45 if( cache_line_size > AllocatePrefetchStepSize ) | |
46 AllocatePrefetchStepSize = cache_line_size; | |
47 if( FLAG_IS_DEFAULT(AllocatePrefetchLines) ) | |
48 AllocatePrefetchLines = 3; // Optimistic value | |
49 assert( AllocatePrefetchLines > 0, "invalid value"); | |
50 if( AllocatePrefetchLines < 1 ) // set valid value in product VM | |
51 AllocatePrefetchLines = 1; // Conservative value | |
52 | |
53 AllocatePrefetchDistance = allocate_prefetch_distance(); | |
54 AllocatePrefetchStyle = allocate_prefetch_style(); | |
55 | |
56 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); | |
57 | |
58 UseSSE = 0; // Only on x86 and x64 | |
59 | |
60 _supports_cx8 = has_v9(); | |
61 | |
62 if (is_niagara1()) { | |
63 // Indirect branch is the same cost as direct | |
64 if (FLAG_IS_DEFAULT(UseInlineCaches)) { | |
675 | 65 FLAG_SET_DEFAULT(UseInlineCaches, false); |
0 | 66 } |
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67 #ifdef _LP64 |
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68 // Single issue niagara1 is slower for CompressedOops |
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69 // but niagaras after that it's fine. |
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70 if (!is_niagara1_plus()) { |
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71 if (FLAG_IS_DEFAULT(UseCompressedOops)) { |
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72 FLAG_SET_ERGO(bool, UseCompressedOops, false); |
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73 } |
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74 } |
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75 // 32-bit oops don't make sense for the 64-bit VM on sparc |
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76 // since the 32-bit VM has the same registers and smaller objects. |
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77 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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78 #endif // _LP64 |
0 | 79 #ifdef COMPILER2 |
80 // Indirect branch is the same cost as direct | |
81 if (FLAG_IS_DEFAULT(UseJumpTables)) { | |
675 | 82 FLAG_SET_DEFAULT(UseJumpTables, true); |
0 | 83 } |
84 // Single-issue, so entry and loop tops are | |
85 // aligned on a single instruction boundary | |
86 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { | |
675 | 87 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); |
0 | 88 } |
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89 if (is_niagara1_plus()) { |
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90 if (AllocatePrefetchStyle > 0 && FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { |
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91 // Use BIS instruction for allocation prefetch. |
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92 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3); |
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93 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
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94 // Use smaller prefetch distance on N2 with BIS |
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95 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); |
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96 } |
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97 } |
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98 if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
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99 // Use different prefetch distance without BIS |
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100 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); |
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101 } |
0 | 102 } |
103 #endif | |
1365 | 104 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { |
105 FLAG_SET_DEFAULT(OptoLoopAlignment, 4); | |
106 } | |
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107 // When using CMS, we cannot use memset() in BOT updates because |
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108 // the sun4v/CMT version in libc_psr uses BIS which exposes |
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109 // "phantom zeros" to concurrent readers. See 6948537. |
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110 if (FLAG_IS_DEFAULT(UseMemSetInBOT) && UseConcMarkSweepGC) { |
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111 FLAG_SET_DEFAULT(UseMemSetInBOT, false); |
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112 } |
0 | 113 } |
114 | |
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115 // Use hardware population count instruction if available. |
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116 if (has_hardware_popc()) { |
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117 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { |
675 | 118 FLAG_SET_DEFAULT(UsePopCountInstruction, true); |
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119 } |
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120 } |
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121 |
0 | 122 char buf[512]; |
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123 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s", |
0 | 124 (has_v8() ? ", has_v8" : ""), |
125 (has_v9() ? ", has_v9" : ""), | |
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126 (has_hardware_popc() ? ", popc" : ""), |
0 | 127 (has_vis1() ? ", has_vis1" : ""), |
128 (has_vis2() ? ", has_vis2" : ""), | |
129 (is_ultra3() ? ", is_ultra3" : ""), | |
130 (is_sun4v() ? ", is_sun4v" : ""), | |
131 (is_niagara1() ? ", is_niagara1" : ""), | |
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132 (is_niagara1_plus() ? ", is_niagara1_plus" : ""), |
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133 (!has_hardware_mul32() ? ", no-mul32" : ""), |
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134 (!has_hardware_div32() ? ", no-div32" : ""), |
0 | 135 (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); |
136 | |
137 // buf is started with ", " or is empty | |
138 _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf); | |
139 | |
140 #ifndef PRODUCT | |
141 if (PrintMiscellaneous && Verbose) { | |
142 tty->print("Allocation: "); | |
143 if (AllocatePrefetchStyle <= 0) { | |
144 tty->print_cr("no prefetching"); | |
145 } else { | |
146 if (AllocatePrefetchLines > 1) { | |
147 tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); | |
148 } else { | |
149 tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance); | |
150 } | |
151 } | |
152 if (PrefetchCopyIntervalInBytes > 0) { | |
153 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); | |
154 } | |
155 if (PrefetchScanIntervalInBytes > 0) { | |
156 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); | |
157 } | |
158 if (PrefetchFieldsAhead > 0) { | |
159 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); | |
160 } | |
161 } | |
162 #endif // PRODUCT | |
163 } | |
164 | |
165 void VM_Version::print_features() { | |
166 tty->print_cr("Version:%s", cpu_features()); | |
167 } | |
168 | |
169 int VM_Version::determine_features() { | |
170 if (UseV8InstrsOnly) { | |
171 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) | |
172 return generic_v8_m; | |
173 } | |
174 | |
175 int features = platform_features(unknown_m); // platform_features() is os_arch specific | |
176 | |
177 if (features == unknown_m) { | |
178 features = generic_v9_m; | |
179 warning("Cannot recognize SPARC version. Default to V9"); | |
180 } | |
181 | |
182 if (UseNiagaraInstrs) { | |
183 if (is_niagara1(features)) { | |
184 // Happy to accomodate... | |
185 } else { | |
186 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) | |
187 features = niagara1_m; | |
188 } | |
189 } else { | |
190 if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { | |
191 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) | |
192 features &= ~niagara1_unique_m; | |
193 } else { | |
194 // Happy to accomodate... | |
195 } | |
196 } | |
197 | |
198 return features; | |
199 } | |
200 | |
201 static int saved_features = 0; | |
202 | |
203 void VM_Version::allow_all() { | |
204 saved_features = _features; | |
205 _features = all_features_m; | |
206 } | |
207 | |
208 void VM_Version::revert() { | |
209 _features = saved_features; | |
210 } | |
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211 |
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212 unsigned int VM_Version::calc_parallel_worker_threads() { |
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213 unsigned int result; |
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214 if (is_niagara1_plus()) { |
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215 result = nof_parallel_worker_threads(5, 16, 8); |
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216 } else { |
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217 result = nof_parallel_worker_threads(5, 8, 8); |
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218 } |
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219 return result; |
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220 } |