1 #ifdef USE_PRAGMA_IDENT_SRC
2 #pragma ident "@(#)vm_version_sparc.cpp 1.56 07/07/02 18:40:59 JVM"
3 #endif
4 /*
5 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
26 */
27
28 # include "incls/_precompiled.incl"
29 # include "incls/_vm_version_sparc.cpp.incl"
30
31 int VM_Version::_features = VM_Version::unknown_m;
32 const char* VM_Version::_features_str = "";
33
34 bool VM_Version::is_niagara1_plus() {
35 // This is a placeholder until the real test is determined.
36 return is_niagara1() &&
37 (os::processor_count() > maximum_niagara1_processor_count());
38 }
39
40 void VM_Version::initialize() {
41 _features = determine_features();
42 PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes();
43 PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes();
44 PrefetchFieldsAhead = prefetch_fields_ahead();
45
46 // Allocation prefetch settings
47 intx cache_line_size = L1_data_cache_line_size();
48 if( cache_line_size > AllocatePrefetchStepSize )
49 AllocatePrefetchStepSize = cache_line_size;
50 if( FLAG_IS_DEFAULT(AllocatePrefetchLines) )
51 AllocatePrefetchLines = 3; // Optimistic value
52 assert( AllocatePrefetchLines > 0, "invalid value");
53 if( AllocatePrefetchLines < 1 ) // set valid value in product VM
54 AllocatePrefetchLines = 1; // Conservative value
55
56 AllocatePrefetchDistance = allocate_prefetch_distance();
57 AllocatePrefetchStyle = allocate_prefetch_style();
58
59 assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");
60
61 UseSSE = 0; // Only on x86 and x64
62
63 _supports_cx8 = has_v9();
64
65 if (is_niagara1()) {
66 // Indirect branch is the same cost as direct
67 if (FLAG_IS_DEFAULT(UseInlineCaches)) {
68 UseInlineCaches = false;
69 }
70 #ifdef _LP64
71 // Single issue niagara1 is slower for CompressedOops
72 // but niagaras after that it's fine.
73 if (!is_niagara1_plus()) {
74 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
75 FLAG_SET_ERGO(bool, UseCompressedOops, false);
76 }
77 }
78 #endif // _LP64
79 #ifdef COMPILER2
80 // Indirect branch is the same cost as direct
81 if (FLAG_IS_DEFAULT(UseJumpTables)) {
82 UseJumpTables = true;
83 }
84 // Single-issue, so entry and loop tops are
85 // aligned on a single instruction boundary
86 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
87 InteriorEntryAlignment = 4;
88 }
89 if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
90 OptoLoopAlignment = 4;
91 }
92 #endif
93 }
94
95 char buf[512];
96 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
97 (has_v8() ? ", has_v8" : ""),
98 (has_v9() ? ", has_v9" : ""),
99 (has_vis1() ? ", has_vis1" : ""),
100 (has_vis2() ? ", has_vis2" : ""),
101 (is_ultra3() ? ", is_ultra3" : ""),
102 (is_sun4v() ? ", is_sun4v" : ""),
103 (is_niagara1() ? ", is_niagara1" : ""),
104 (!has_hardware_int_muldiv() ? ", no-muldiv" : ""),
105 (!has_hardware_fsmuld() ? ", no-fsmuld" : ""));
106
107 // buf is started with ", " or is empty
108 _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf);
109
110 #ifndef PRODUCT
111 if (PrintMiscellaneous && Verbose) {
112 tty->print("Allocation: ");
113 if (AllocatePrefetchStyle <= 0) {
114 tty->print_cr("no prefetching");
115 } else {
116 if (AllocatePrefetchLines > 1) {
117 tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize);
118 } else {
119 tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance);
120 }
121 }
122 if (PrefetchCopyIntervalInBytes > 0) {
123 tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes);
124 }
125 if (PrefetchScanIntervalInBytes > 0) {
126 tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes);
127 }
128 if (PrefetchFieldsAhead > 0) {
129 tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead);
130 }
131 }
132 #endif // PRODUCT
133 }
134
135 void VM_Version::print_features() {
136 tty->print_cr("Version:%s", cpu_features());
137 }
138
139 int VM_Version::determine_features() {
140 if (UseV8InstrsOnly) {
141 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");)
142 return generic_v8_m;
143 }
144
145 int features = platform_features(unknown_m); // platform_features() is os_arch specific
146
147 if (features == unknown_m) {
148 features = generic_v9_m;
149 warning("Cannot recognize SPARC version. Default to V9");
150 }
151
152 if (UseNiagaraInstrs) {
153 if (is_niagara1(features)) {
154 // Happy to accomodate...
155 } else {
156 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");)
157 features = niagara1_m;
158 }
159 } else {
160 if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) {
161 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");)
162 features &= ~niagara1_unique_m;
163 } else {
164 // Happy to accomodate...
165 }
166 }
167
168 return features;
169 }
170
171 static int saved_features = 0;
172
173 void VM_Version::allow_all() {
174 saved_features = _features;
175 _features = all_features_m;
176 }
177
178 void VM_Version::revert() {
179 _features = saved_features;
180 }
181
182 unsigned int VM_Version::calc_parallel_worker_threads() {
183 unsigned int result;
184 if (is_niagara1_plus()) {
185 result = nof_parallel_worker_threads(5, 16, 8);
186 } else {
187 result = nof_parallel_worker_threads(5, 8, 8);
188 }
189 return result;
190 }