Tue, 12 Oct 2010 23:51:20 -0700
6991512: G1 barriers fail with 64bit C1
Summary: Fix compare-and-swap intrinsic problem with G1 post-barriers and issue with branch ranges in G1 stubs on sparc
Reviewed-by: never, kvn
duke@435 | 1 | /* |
trims@1907 | 2 | * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | # include "incls/_precompiled.incl" |
duke@435 | 26 | # include "incls/_vm_version_sparc.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | int VM_Version::_features = VM_Version::unknown_m; |
duke@435 | 29 | const char* VM_Version::_features_str = ""; |
duke@435 | 30 | |
jmasa@445 | 31 | bool VM_Version::is_niagara1_plus() { |
jmasa@445 | 32 | // This is a placeholder until the real test is determined. |
jmasa@445 | 33 | return is_niagara1() && |
jmasa@445 | 34 | (os::processor_count() > maximum_niagara1_processor_count()); |
jmasa@445 | 35 | } |
jmasa@445 | 36 | |
duke@435 | 37 | void VM_Version::initialize() { |
duke@435 | 38 | _features = determine_features(); |
duke@435 | 39 | PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); |
duke@435 | 40 | PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); |
duke@435 | 41 | PrefetchFieldsAhead = prefetch_fields_ahead(); |
duke@435 | 42 | |
duke@435 | 43 | // Allocation prefetch settings |
duke@435 | 44 | intx cache_line_size = L1_data_cache_line_size(); |
duke@435 | 45 | if( cache_line_size > AllocatePrefetchStepSize ) |
duke@435 | 46 | AllocatePrefetchStepSize = cache_line_size; |
duke@435 | 47 | if( FLAG_IS_DEFAULT(AllocatePrefetchLines) ) |
duke@435 | 48 | AllocatePrefetchLines = 3; // Optimistic value |
duke@435 | 49 | assert( AllocatePrefetchLines > 0, "invalid value"); |
duke@435 | 50 | if( AllocatePrefetchLines < 1 ) // set valid value in product VM |
duke@435 | 51 | AllocatePrefetchLines = 1; // Conservative value |
duke@435 | 52 | |
duke@435 | 53 | AllocatePrefetchDistance = allocate_prefetch_distance(); |
duke@435 | 54 | AllocatePrefetchStyle = allocate_prefetch_style(); |
duke@435 | 55 | |
duke@435 | 56 | assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); |
duke@435 | 57 | |
duke@435 | 58 | UseSSE = 0; // Only on x86 and x64 |
duke@435 | 59 | |
duke@435 | 60 | _supports_cx8 = has_v9(); |
duke@435 | 61 | |
duke@435 | 62 | if (is_niagara1()) { |
duke@435 | 63 | // Indirect branch is the same cost as direct |
duke@435 | 64 | if (FLAG_IS_DEFAULT(UseInlineCaches)) { |
kvn@1110 | 65 | FLAG_SET_DEFAULT(UseInlineCaches, false); |
duke@435 | 66 | } |
coleenp@548 | 67 | #ifdef _LP64 |
kvn@1077 | 68 | // 32-bit oops don't make sense for the 64-bit VM on sparc |
kvn@1077 | 69 | // since the 32-bit VM has the same registers and smaller objects. |
kvn@1077 | 70 | Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
coleenp@548 | 71 | #endif // _LP64 |
duke@435 | 72 | #ifdef COMPILER2 |
duke@435 | 73 | // Indirect branch is the same cost as direct |
duke@435 | 74 | if (FLAG_IS_DEFAULT(UseJumpTables)) { |
kvn@1110 | 75 | FLAG_SET_DEFAULT(UseJumpTables, true); |
duke@435 | 76 | } |
duke@435 | 77 | // Single-issue, so entry and loop tops are |
duke@435 | 78 | // aligned on a single instruction boundary |
duke@435 | 79 | if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { |
kvn@1110 | 80 | FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); |
duke@435 | 81 | } |
kvn@1802 | 82 | if (is_niagara1_plus()) { |
kvn@1802 | 83 | if (AllocatePrefetchStyle > 0 && FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { |
kvn@1802 | 84 | // Use BIS instruction for allocation prefetch. |
kvn@1802 | 85 | FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3); |
kvn@1802 | 86 | if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
kvn@1802 | 87 | // Use smaller prefetch distance on N2 with BIS |
kvn@1802 | 88 | FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); |
kvn@1802 | 89 | } |
kvn@1802 | 90 | } |
kvn@1802 | 91 | if (AllocatePrefetchStyle != 3 && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { |
kvn@1802 | 92 | // Use different prefetch distance without BIS |
kvn@1802 | 93 | FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); |
kvn@1802 | 94 | } |
duke@435 | 95 | } |
duke@435 | 96 | #endif |
kvn@1800 | 97 | if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { |
kvn@1800 | 98 | FLAG_SET_DEFAULT(OptoLoopAlignment, 4); |
kvn@1800 | 99 | } |
ysr@1873 | 100 | // When using CMS, we cannot use memset() in BOT updates because |
ysr@1873 | 101 | // the sun4v/CMT version in libc_psr uses BIS which exposes |
ysr@1873 | 102 | // "phantom zeros" to concurrent readers. See 6948537. |
ysr@1873 | 103 | if (FLAG_IS_DEFAULT(UseMemSetInBOT) && UseConcMarkSweepGC) { |
ysr@1873 | 104 | FLAG_SET_DEFAULT(UseMemSetInBOT, false); |
ysr@1873 | 105 | } |
duke@435 | 106 | } |
duke@435 | 107 | |
twisti@1078 | 108 | // Use hardware population count instruction if available. |
twisti@1078 | 109 | if (has_hardware_popc()) { |
twisti@1078 | 110 | if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { |
kvn@1110 | 111 | FLAG_SET_DEFAULT(UsePopCountInstruction, true); |
twisti@1078 | 112 | } |
twisti@1078 | 113 | } |
twisti@1078 | 114 | |
never@2085 | 115 | #ifdef COMPILER2 |
never@2085 | 116 | // Currently not supported anywhere. |
never@2085 | 117 | FLAG_SET_DEFAULT(UseFPUForSpilling, false); |
never@2085 | 118 | #endif |
never@2085 | 119 | |
duke@435 | 120 | char buf[512]; |
twisti@1078 | 121 | jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s", |
duke@435 | 122 | (has_v8() ? ", has_v8" : ""), |
duke@435 | 123 | (has_v9() ? ", has_v9" : ""), |
twisti@1078 | 124 | (has_hardware_popc() ? ", popc" : ""), |
duke@435 | 125 | (has_vis1() ? ", has_vis1" : ""), |
duke@435 | 126 | (has_vis2() ? ", has_vis2" : ""), |
duke@435 | 127 | (is_ultra3() ? ", is_ultra3" : ""), |
duke@435 | 128 | (is_sun4v() ? ", is_sun4v" : ""), |
duke@435 | 129 | (is_niagara1() ? ", is_niagara1" : ""), |
twisti@1076 | 130 | (is_niagara1_plus() ? ", is_niagara1_plus" : ""), |
twisti@1076 | 131 | (!has_hardware_mul32() ? ", no-mul32" : ""), |
twisti@1076 | 132 | (!has_hardware_div32() ? ", no-div32" : ""), |
duke@435 | 133 | (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); |
duke@435 | 134 | |
duke@435 | 135 | // buf is started with ", " or is empty |
duke@435 | 136 | _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf); |
duke@435 | 137 | |
duke@435 | 138 | #ifndef PRODUCT |
duke@435 | 139 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 140 | tty->print("Allocation: "); |
duke@435 | 141 | if (AllocatePrefetchStyle <= 0) { |
duke@435 | 142 | tty->print_cr("no prefetching"); |
duke@435 | 143 | } else { |
duke@435 | 144 | if (AllocatePrefetchLines > 1) { |
duke@435 | 145 | tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); |
duke@435 | 146 | } else { |
duke@435 | 147 | tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance); |
duke@435 | 148 | } |
duke@435 | 149 | } |
duke@435 | 150 | if (PrefetchCopyIntervalInBytes > 0) { |
duke@435 | 151 | tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); |
duke@435 | 152 | } |
duke@435 | 153 | if (PrefetchScanIntervalInBytes > 0) { |
duke@435 | 154 | tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); |
duke@435 | 155 | } |
duke@435 | 156 | if (PrefetchFieldsAhead > 0) { |
duke@435 | 157 | tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); |
duke@435 | 158 | } |
duke@435 | 159 | } |
duke@435 | 160 | #endif // PRODUCT |
duke@435 | 161 | } |
duke@435 | 162 | |
duke@435 | 163 | void VM_Version::print_features() { |
duke@435 | 164 | tty->print_cr("Version:%s", cpu_features()); |
duke@435 | 165 | } |
duke@435 | 166 | |
duke@435 | 167 | int VM_Version::determine_features() { |
duke@435 | 168 | if (UseV8InstrsOnly) { |
duke@435 | 169 | NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) |
duke@435 | 170 | return generic_v8_m; |
duke@435 | 171 | } |
duke@435 | 172 | |
duke@435 | 173 | int features = platform_features(unknown_m); // platform_features() is os_arch specific |
duke@435 | 174 | |
duke@435 | 175 | if (features == unknown_m) { |
duke@435 | 176 | features = generic_v9_m; |
duke@435 | 177 | warning("Cannot recognize SPARC version. Default to V9"); |
duke@435 | 178 | } |
duke@435 | 179 | |
duke@435 | 180 | if (UseNiagaraInstrs) { |
duke@435 | 181 | if (is_niagara1(features)) { |
duke@435 | 182 | // Happy to accomodate... |
duke@435 | 183 | } else { |
duke@435 | 184 | NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) |
duke@435 | 185 | features = niagara1_m; |
duke@435 | 186 | } |
duke@435 | 187 | } else { |
duke@435 | 188 | if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { |
duke@435 | 189 | NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) |
duke@435 | 190 | features &= ~niagara1_unique_m; |
duke@435 | 191 | } else { |
duke@435 | 192 | // Happy to accomodate... |
duke@435 | 193 | } |
duke@435 | 194 | } |
duke@435 | 195 | |
duke@435 | 196 | return features; |
duke@435 | 197 | } |
duke@435 | 198 | |
duke@435 | 199 | static int saved_features = 0; |
duke@435 | 200 | |
duke@435 | 201 | void VM_Version::allow_all() { |
duke@435 | 202 | saved_features = _features; |
duke@435 | 203 | _features = all_features_m; |
duke@435 | 204 | } |
duke@435 | 205 | |
duke@435 | 206 | void VM_Version::revert() { |
duke@435 | 207 | _features = saved_features; |
duke@435 | 208 | } |
jmasa@445 | 209 | |
jmasa@445 | 210 | unsigned int VM_Version::calc_parallel_worker_threads() { |
jmasa@445 | 211 | unsigned int result; |
jmasa@445 | 212 | if (is_niagara1_plus()) { |
jmasa@445 | 213 | result = nof_parallel_worker_threads(5, 16, 8); |
jmasa@445 | 214 | } else { |
jmasa@445 | 215 | result = nof_parallel_worker_threads(5, 8, 8); |
jmasa@445 | 216 | } |
jmasa@445 | 217 | return result; |
jmasa@445 | 218 | } |