Mon, 09 Mar 2020 12:54:53 +0000
8240295: hs_err elapsed time in seconds is not accurate enough
Reviewed-by: dholmes, sspitsyn
duke@435 | 1 | /* |
tschatzl@8662 | 2 | * Copyright (c) 1998, 2016, 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 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "memory/universe.hpp" |
stefank@2314 | 27 | #include "oops/oop.inline.hpp" |
stefank@2314 | 28 | #include "runtime/arguments.hpp" |
stefank@2314 | 29 | #ifdef TARGET_ARCH_x86 |
stefank@2314 | 30 | # include "vm_version_x86.hpp" |
stefank@2314 | 31 | #endif |
stefank@2314 | 32 | #ifdef TARGET_ARCH_sparc |
stefank@2314 | 33 | # include "vm_version_sparc.hpp" |
stefank@2314 | 34 | #endif |
stefank@2314 | 35 | #ifdef TARGET_ARCH_zero |
stefank@2314 | 36 | # include "vm_version_zero.hpp" |
stefank@2314 | 37 | #endif |
bobv@2508 | 38 | #ifdef TARGET_ARCH_arm |
bobv@2508 | 39 | # include "vm_version_arm.hpp" |
bobv@2508 | 40 | #endif |
bobv@2508 | 41 | #ifdef TARGET_ARCH_ppc |
bobv@2508 | 42 | # include "vm_version_ppc.hpp" |
bobv@2508 | 43 | #endif |
duke@435 | 44 | |
duke@435 | 45 | const char* Abstract_VM_Version::_s_vm_release = Abstract_VM_Version::vm_release(); |
duke@435 | 46 | const char* Abstract_VM_Version::_s_internal_vm_info_string = Abstract_VM_Version::internal_vm_info_string(); |
duke@435 | 47 | bool Abstract_VM_Version::_supports_cx8 = false; |
roland@4106 | 48 | bool Abstract_VM_Version::_supports_atomic_getset4 = false; |
roland@4106 | 49 | bool Abstract_VM_Version::_supports_atomic_getset8 = false; |
roland@4106 | 50 | bool Abstract_VM_Version::_supports_atomic_getadd4 = false; |
roland@4106 | 51 | bool Abstract_VM_Version::_supports_atomic_getadd8 = false; |
duke@435 | 52 | unsigned int Abstract_VM_Version::_logical_processors_per_package = 1U; |
kevinw@8729 | 53 | unsigned int Abstract_VM_Version::_L1_data_cache_line_size = 0; |
kvn@3052 | 54 | int Abstract_VM_Version::_reserve_for_allocation_prefetch = 0; |
duke@435 | 55 | |
duke@435 | 56 | #ifndef HOTSPOT_RELEASE_VERSION |
duke@435 | 57 | #error HOTSPOT_RELEASE_VERSION must be defined |
duke@435 | 58 | #endif |
duke@435 | 59 | #ifndef JRE_RELEASE_VERSION |
duke@435 | 60 | #error JRE_RELEASE_VERSION must be defined |
duke@435 | 61 | #endif |
duke@435 | 62 | #ifndef HOTSPOT_BUILD_TARGET |
duke@435 | 63 | #error HOTSPOT_BUILD_TARGET must be defined |
duke@435 | 64 | #endif |
duke@435 | 65 | |
duke@435 | 66 | #ifdef PRODUCT |
duke@435 | 67 | #define VM_RELEASE HOTSPOT_RELEASE_VERSION |
duke@435 | 68 | #else |
duke@435 | 69 | #define VM_RELEASE HOTSPOT_RELEASE_VERSION "-" HOTSPOT_BUILD_TARGET |
duke@435 | 70 | #endif |
duke@435 | 71 | |
duke@435 | 72 | // HOTSPOT_RELEASE_VERSION must follow the release version naming convention |
duke@435 | 73 | // <major_ver>.<minor_ver>-b<nn>[-<identifier>][-<debug_target>] |
duke@435 | 74 | int Abstract_VM_Version::_vm_major_version = 0; |
duke@435 | 75 | int Abstract_VM_Version::_vm_minor_version = 0; |
duke@435 | 76 | int Abstract_VM_Version::_vm_build_number = 0; |
duke@435 | 77 | bool Abstract_VM_Version::_initialized = false; |
jmasa@445 | 78 | int Abstract_VM_Version::_parallel_worker_threads = 0; |
jmasa@445 | 79 | bool Abstract_VM_Version::_parallel_worker_threads_initialized = false; |
duke@435 | 80 | |
duke@435 | 81 | void Abstract_VM_Version::initialize() { |
duke@435 | 82 | if (_initialized) { |
duke@435 | 83 | return; |
duke@435 | 84 | } |
duke@435 | 85 | char* vm_version = os::strdup(HOTSPOT_RELEASE_VERSION); |
duke@435 | 86 | |
duke@435 | 87 | // Expecting the next vm_version format: |
duke@435 | 88 | // <major_ver>.<minor_ver>-b<nn>[-<identifier>] |
duke@435 | 89 | char* vm_major_ver = vm_version; |
duke@435 | 90 | assert(isdigit(vm_major_ver[0]),"wrong vm major version number"); |
duke@435 | 91 | char* vm_minor_ver = strchr(vm_major_ver, '.'); |
duke@435 | 92 | assert(vm_minor_ver != NULL && isdigit(vm_minor_ver[1]),"wrong vm minor version number"); |
duke@435 | 93 | vm_minor_ver[0] = '\0'; // terminate vm_major_ver |
duke@435 | 94 | vm_minor_ver += 1; |
duke@435 | 95 | char* vm_build_num = strchr(vm_minor_ver, '-'); |
duke@435 | 96 | assert(vm_build_num != NULL && vm_build_num[1] == 'b' && isdigit(vm_build_num[2]),"wrong vm build number"); |
duke@435 | 97 | vm_build_num[0] = '\0'; // terminate vm_minor_ver |
duke@435 | 98 | vm_build_num += 2; |
duke@435 | 99 | |
duke@435 | 100 | _vm_major_version = atoi(vm_major_ver); |
duke@435 | 101 | _vm_minor_version = atoi(vm_minor_ver); |
duke@435 | 102 | _vm_build_number = atoi(vm_build_num); |
duke@435 | 103 | |
duke@435 | 104 | os::free(vm_version); |
duke@435 | 105 | _initialized = true; |
duke@435 | 106 | } |
duke@435 | 107 | |
duke@435 | 108 | #if defined(_LP64) |
duke@435 | 109 | #define VMLP "64-Bit " |
duke@435 | 110 | #else |
duke@435 | 111 | #define VMLP "" |
duke@435 | 112 | #endif |
duke@435 | 113 | |
jprovino@4165 | 114 | #ifndef VMTYPE |
jprovino@4165 | 115 | #ifdef TIERED |
jprovino@4165 | 116 | #define VMTYPE "Server" |
jprovino@4165 | 117 | #else // TIERED |
jprovino@4165 | 118 | #ifdef ZERO |
jprovino@4165 | 119 | #ifdef SHARK |
jprovino@4165 | 120 | #define VMTYPE "Shark" |
jprovino@4165 | 121 | #else // SHARK |
jprovino@4165 | 122 | #define VMTYPE "Zero" |
jprovino@4165 | 123 | #endif // SHARK |
jprovino@4165 | 124 | #else // ZERO |
jprovino@4165 | 125 | #define VMTYPE COMPILER1_PRESENT("Client") \ |
jprovino@4165 | 126 | COMPILER2_PRESENT("Server") |
jprovino@4165 | 127 | #endif // ZERO |
jprovino@4165 | 128 | #endif // TIERED |
jprovino@4165 | 129 | #endif |
duke@435 | 130 | |
duke@435 | 131 | #ifndef HOTSPOT_VM_DISTRO |
duke@435 | 132 | #error HOTSPOT_VM_DISTRO must be defined |
duke@435 | 133 | #endif |
dholmes@3201 | 134 | #define VMNAME HOTSPOT_VM_DISTRO " " VMLP EMBEDDED_ONLY("Embedded ") VMTYPE " VM" |
duke@435 | 135 | |
duke@435 | 136 | const char* Abstract_VM_Version::vm_name() { |
duke@435 | 137 | return VMNAME; |
duke@435 | 138 | } |
duke@435 | 139 | |
duke@435 | 140 | |
duke@435 | 141 | const char* Abstract_VM_Version::vm_vendor() { |
duke@435 | 142 | #ifdef VENDOR |
erikj@9635 | 143 | return VENDOR; |
duke@435 | 144 | #else |
zgu@2155 | 145 | return JDK_Version::is_gte_jdk17x_version() ? |
zgu@2155 | 146 | "Oracle Corporation" : "Sun Microsystems Inc."; |
duke@435 | 147 | #endif |
duke@435 | 148 | } |
duke@435 | 149 | |
duke@435 | 150 | |
duke@435 | 151 | const char* Abstract_VM_Version::vm_info_string() { |
duke@435 | 152 | switch (Arguments::mode()) { |
duke@435 | 153 | case Arguments::_int: |
duke@435 | 154 | return UseSharedSpaces ? "interpreted mode, sharing" : "interpreted mode"; |
duke@435 | 155 | case Arguments::_mixed: |
duke@435 | 156 | return UseSharedSpaces ? "mixed mode, sharing" : "mixed mode"; |
duke@435 | 157 | case Arguments::_comp: |
duke@435 | 158 | return UseSharedSpaces ? "compiled mode, sharing" : "compiled mode"; |
duke@435 | 159 | }; |
duke@435 | 160 | ShouldNotReachHere(); |
duke@435 | 161 | return ""; |
duke@435 | 162 | } |
duke@435 | 163 | |
duke@435 | 164 | // NOTE: do *not* use stringStream. this function is called by |
duke@435 | 165 | // fatal error handler. if the crash is in native thread, |
duke@435 | 166 | // stringStream cannot get resource allocated and will SEGV. |
duke@435 | 167 | const char* Abstract_VM_Version::vm_release() { |
duke@435 | 168 | return VM_RELEASE; |
duke@435 | 169 | } |
duke@435 | 170 | |
ohrstrom@3517 | 171 | // NOTE: do *not* use stringStream. this function is called by |
ohrstrom@3517 | 172 | // fatal error handlers. if the crash is in native thread, |
ohrstrom@3517 | 173 | // stringStream cannot get resource allocated and will SEGV. |
ohrstrom@3517 | 174 | const char* Abstract_VM_Version::jre_release_version() { |
ohrstrom@3517 | 175 | return JRE_RELEASE_VERSION; |
ohrstrom@3517 | 176 | } |
ohrstrom@3517 | 177 | |
duke@435 | 178 | #define OS LINUX_ONLY("linux") \ |
duke@435 | 179 | WINDOWS_ONLY("windows") \ |
never@3156 | 180 | SOLARIS_ONLY("solaris") \ |
goetz@6461 | 181 | AIX_ONLY("aix") \ |
never@3156 | 182 | BSD_ONLY("bsd") |
duke@435 | 183 | |
dlong@7598 | 184 | #ifndef CPU |
never@1445 | 185 | #ifdef ZERO |
never@1445 | 186 | #define CPU ZERO_LIBARCH |
sgehwolf@9493 | 187 | #elif defined(PPC64) |
sgehwolf@9493 | 188 | #if defined(VM_LITTLE_ENDIAN) |
sgehwolf@9493 | 189 | #define CPU "ppc64le" |
sgehwolf@9493 | 190 | #else |
sgehwolf@9493 | 191 | #define CPU "ppc64" |
sgehwolf@9493 | 192 | #endif |
never@1445 | 193 | #else |
duke@435 | 194 | #define CPU IA32_ONLY("x86") \ |
duke@435 | 195 | IA64_ONLY("ia64") \ |
duke@435 | 196 | AMD64_ONLY("amd64") \ |
duke@435 | 197 | SPARC_ONLY("sparc") |
never@1445 | 198 | #endif // ZERO |
dlong@7598 | 199 | #endif |
duke@435 | 200 | |
duke@435 | 201 | const char *Abstract_VM_Version::vm_platform_string() { |
duke@435 | 202 | return OS "-" CPU; |
duke@435 | 203 | } |
duke@435 | 204 | |
duke@435 | 205 | const char* Abstract_VM_Version::internal_vm_info_string() { |
duke@435 | 206 | #ifndef HOTSPOT_BUILD_USER |
duke@435 | 207 | #define HOTSPOT_BUILD_USER unknown |
duke@435 | 208 | #endif |
duke@435 | 209 | |
duke@435 | 210 | #ifndef HOTSPOT_BUILD_COMPILER |
duke@435 | 211 | #ifdef _MSC_VER |
duke@435 | 212 | #if _MSC_VER == 1100 |
duke@435 | 213 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 5.0" |
duke@435 | 214 | #elif _MSC_VER == 1200 |
duke@435 | 215 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 6.0" |
duke@435 | 216 | #elif _MSC_VER == 1310 |
kvn@1080 | 217 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 7.1 (VS2003)" |
duke@435 | 218 | #elif _MSC_VER == 1400 |
kvn@1080 | 219 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 8.0 (VS2005)" |
kvn@1080 | 220 | #elif _MSC_VER == 1500 |
kvn@1080 | 221 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 9.0 (VS2008)" |
kmo@4757 | 222 | #elif _MSC_VER == 1600 |
kmo@4757 | 223 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 10.0 (VS2010)" |
kmo@4757 | 224 | #elif _MSC_VER == 1700 |
kmo@4757 | 225 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 11.0 (VS2012)" |
kevinw@9320 | 226 | #elif _MSC_VER == 1800 |
kevinw@9320 | 227 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 12.0 (VS2013)" |
kevinw@9320 | 228 | #elif _MSC_VER == 1900 |
kevinw@9320 | 229 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 14.0 (VS2015)" |
mchinnathamb@9945 | 230 | #elif _MSC_VER == 1911 |
mchinnathamb@9945 | 231 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 15.3 (VS2017)" |
kevinw@9320 | 232 | #elif _MSC_VER == 1912 |
kevinw@9320 | 233 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 15.5 (VS2017)" |
kevinw@9488 | 234 | #elif _MSC_VER == 1913 |
kevinw@9488 | 235 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 15.6 (VS2017)" |
mchinnathamb@9945 | 236 | #elif _MSC_VER == 1914 |
mchinnathamb@9945 | 237 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 15.7 (VS2017)" |
mchinnathamb@9945 | 238 | #elif _MSC_VER == 1915 |
mchinnathamb@9945 | 239 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 15.8 (VS2017)" |
mbaesken@9946 | 240 | #elif _MSC_VER == 1916 |
mbaesken@9946 | 241 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 15.9 (VS2017)" |
mbaesken@9946 | 242 | #elif _MSC_VER == 1920 |
mbaesken@9946 | 243 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 16.0 (VS2019)" |
mbaesken@9946 | 244 | #elif _MSC_VER == 1921 |
mbaesken@9946 | 245 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 16.1 (VS2019)" |
mbaesken@9946 | 246 | #elif _MSC_VER == 1922 |
mbaesken@9946 | 247 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 16.2 (VS2019)" |
mbaesken@9946 | 248 | #elif _MSC_VER == 1923 |
mbaesken@9946 | 249 | #define HOTSPOT_BUILD_COMPILER "MS VC++ 16.3 (VS2019)" |
duke@435 | 250 | #else |
duke@435 | 251 | #define HOTSPOT_BUILD_COMPILER "unknown MS VC++:" XSTR(_MSC_VER) |
duke@435 | 252 | #endif |
duke@435 | 253 | #elif defined(__SUNPRO_CC) |
duke@435 | 254 | #if __SUNPRO_CC == 0x420 |
duke@435 | 255 | #define HOTSPOT_BUILD_COMPILER "Workshop 4.2" |
duke@435 | 256 | #elif __SUNPRO_CC == 0x500 |
duke@435 | 257 | #define HOTSPOT_BUILD_COMPILER "Workshop 5.0 compat=" XSTR(__SUNPRO_CC_COMPAT) |
duke@435 | 258 | #elif __SUNPRO_CC == 0x520 |
duke@435 | 259 | #define HOTSPOT_BUILD_COMPILER "Workshop 5.2 compat=" XSTR(__SUNPRO_CC_COMPAT) |
duke@435 | 260 | #elif __SUNPRO_CC == 0x580 |
duke@435 | 261 | #define HOTSPOT_BUILD_COMPILER "Workshop 5.8" |
duke@435 | 262 | #elif __SUNPRO_CC == 0x590 |
duke@435 | 263 | #define HOTSPOT_BUILD_COMPILER "Workshop 5.9" |
jcoomes@1902 | 264 | #elif __SUNPRO_CC == 0x5100 |
jcoomes@1902 | 265 | #define HOTSPOT_BUILD_COMPILER "Sun Studio 12u1" |
dcubed@5537 | 266 | #elif __SUNPRO_CC == 0x5120 |
dcubed@5537 | 267 | #define HOTSPOT_BUILD_COMPILER "Sun Studio 12u3" |
duke@435 | 268 | #else |
duke@435 | 269 | #define HOTSPOT_BUILD_COMPILER "unknown Workshop:" XSTR(__SUNPRO_CC) |
duke@435 | 270 | #endif |
duke@435 | 271 | #elif defined(__GNUC__) |
duke@435 | 272 | #define HOTSPOT_BUILD_COMPILER "gcc " __VERSION__ |
goetz@6461 | 273 | #elif defined(__IBMCPP__) |
goetz@6461 | 274 | #define HOTSPOT_BUILD_COMPILER "xlC " XSTR(__IBMCPP__) |
goetz@6461 | 275 | |
duke@435 | 276 | #else |
duke@435 | 277 | #define HOTSPOT_BUILD_COMPILER "unknown compiler" |
duke@435 | 278 | #endif |
duke@435 | 279 | #endif |
duke@435 | 280 | |
bobv@2508 | 281 | #ifndef FLOAT_ARCH |
bobv@2508 | 282 | #if defined(__SOFTFP__) |
dholmes@4288 | 283 | #define FLOAT_ARCH_STR "-sflt" |
bobv@2508 | 284 | #else |
dholmes@4288 | 285 | #define FLOAT_ARCH_STR "" |
bobv@2508 | 286 | #endif |
dholmes@4288 | 287 | #else |
dholmes@4288 | 288 | #define FLOAT_ARCH_STR XSTR(FLOAT_ARCH) |
bobv@2508 | 289 | #endif |
duke@435 | 290 | |
dholmes@4288 | 291 | return VMNAME " (" VM_RELEASE ") for " OS "-" CPU FLOAT_ARCH_STR |
duke@435 | 292 | " JRE (" JRE_RELEASE_VERSION "), built on " __DATE__ " " __TIME__ |
duke@435 | 293 | " by " XSTR(HOTSPOT_BUILD_USER) " with " HOTSPOT_BUILD_COMPILER; |
duke@435 | 294 | } |
duke@435 | 295 | |
kamg@2515 | 296 | const char *Abstract_VM_Version::vm_build_user() { |
kamg@2515 | 297 | return HOTSPOT_BUILD_USER; |
kamg@2515 | 298 | } |
kamg@2515 | 299 | |
duke@435 | 300 | unsigned int Abstract_VM_Version::jvm_version() { |
duke@435 | 301 | return ((Abstract_VM_Version::vm_major_version() & 0xFF) << 24) | |
sgehwolf@9915 | 302 | ((Abstract_VM_Version::vm_minor_version() & 0xFFFF) << 8) | |
duke@435 | 303 | (Abstract_VM_Version::vm_build_number() & 0xFF); |
duke@435 | 304 | } |
duke@435 | 305 | |
duke@435 | 306 | |
duke@435 | 307 | void VM_Version_init() { |
duke@435 | 308 | VM_Version::initialize(); |
duke@435 | 309 | |
duke@435 | 310 | #ifndef PRODUCT |
duke@435 | 311 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 312 | os::print_cpu_info(tty); |
duke@435 | 313 | } |
duke@435 | 314 | #endif |
duke@435 | 315 | } |
jmasa@445 | 316 | |
jmasa@445 | 317 | unsigned int Abstract_VM_Version::nof_parallel_worker_threads( |
jmasa@445 | 318 | unsigned int num, |
jmasa@445 | 319 | unsigned int den, |
jmasa@445 | 320 | unsigned int switch_pt) { |
jmasa@445 | 321 | if (FLAG_IS_DEFAULT(ParallelGCThreads)) { |
jmasa@445 | 322 | assert(ParallelGCThreads == 0, "Default ParallelGCThreads is not 0"); |
jmasa@445 | 323 | // For very large machines, there are diminishing returns |
jmasa@445 | 324 | // for large numbers of worker threads. Instead of |
jmasa@445 | 325 | // hogging the whole system, use a fraction of the workers for every |
jmasa@445 | 326 | // processor after the first 8. For example, on a 72 cpu machine |
jmasa@445 | 327 | // and a chosen fraction of 5/8 |
jmasa@445 | 328 | // use 8 + (72 - 8) * (5/8) == 48 worker threads. |
tschatzl@8662 | 329 | unsigned int ncpus = (unsigned int) os::initial_active_processor_count(); |
jmasa@445 | 330 | return (ncpus <= switch_pt) ? |
jmasa@445 | 331 | ncpus : |
jmasa@445 | 332 | (switch_pt + ((ncpus - switch_pt) * num) / den); |
jmasa@445 | 333 | } else { |
jmasa@445 | 334 | return ParallelGCThreads; |
jmasa@445 | 335 | } |
jmasa@445 | 336 | } |
jmasa@445 | 337 | |
jmasa@445 | 338 | unsigned int Abstract_VM_Version::calc_parallel_worker_threads() { |
jmasa@445 | 339 | return nof_parallel_worker_threads(5, 8, 8); |
jmasa@445 | 340 | } |
jmasa@445 | 341 | |
jmasa@445 | 342 | |
jmasa@445 | 343 | // Does not set the _initialized flag since it is |
jmasa@445 | 344 | // a global flag. |
jmasa@445 | 345 | unsigned int Abstract_VM_Version::parallel_worker_threads() { |
jmasa@445 | 346 | if (!_parallel_worker_threads_initialized) { |
jmasa@445 | 347 | if (FLAG_IS_DEFAULT(ParallelGCThreads)) { |
jmasa@445 | 348 | _parallel_worker_threads = VM_Version::calc_parallel_worker_threads(); |
jmasa@445 | 349 | } else { |
jmasa@445 | 350 | _parallel_worker_threads = ParallelGCThreads; |
jmasa@445 | 351 | } |
jmasa@445 | 352 | _parallel_worker_threads_initialized = true; |
jmasa@445 | 353 | } |
jmasa@445 | 354 | return _parallel_worker_threads; |
jmasa@445 | 355 | } |