1 /* 2 * kmp_global.cpp -- KPTS global variables for runtime support library 3 */ 4 5 //===----------------------------------------------------------------------===// 6 // 7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 8 // See https://llvm.org/LICENSE.txt for license information. 9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "kmp.h" 14 #include "kmp_affinity.h" 15 #if KMP_USE_HIER_SCHED 16 #include "kmp_dispatch_hier.h" 17 #endif 18 19 kmp_key_t __kmp_gtid_threadprivate_key; 20 21 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 22 kmp_cpuinfo_t __kmp_cpuinfo = {0}; // Not initialized 23 #endif 24 25 #if KMP_STATS_ENABLED 26 #include "kmp_stats.h" 27 // lock for modifying the global __kmp_stats_list 28 kmp_tas_lock_t __kmp_stats_lock; 29 30 // global list of per thread stats, the head is a sentinel node which 31 // accumulates all stats produced before __kmp_create_worker is called. 32 kmp_stats_list *__kmp_stats_list; 33 34 // thread local pointer to stats node within list 35 KMP_THREAD_LOCAL kmp_stats_list *__kmp_stats_thread_ptr = NULL; 36 37 // gives reference tick for all events (considered the 0 tick) 38 tsc_tick_count __kmp_stats_start_time; 39 #endif 40 41 /* ----------------------------------------------------- */ 42 /* INITIALIZATION VARIABLES */ 43 /* they are syncronized to write during init, but read anytime */ 44 volatile int __kmp_init_serial = FALSE; 45 volatile int __kmp_init_gtid = FALSE; 46 volatile int __kmp_init_common = FALSE; 47 volatile int __kmp_init_middle = FALSE; 48 volatile int __kmp_init_parallel = FALSE; 49 volatile int __kmp_init_hidden_helper = FALSE; 50 volatile int __kmp_init_hidden_helper_threads = FALSE; 51 volatile int __kmp_hidden_helper_team_done = FALSE; 52 #if KMP_USE_MONITOR 53 volatile int __kmp_init_monitor = 54 0; /* 1 - launched, 2 - actually started (Windows* OS only) */ 55 #endif 56 volatile int __kmp_init_user_locks = FALSE; 57 58 /* list of address of allocated caches for commons */ 59 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL; 60 61 int __kmp_init_counter = 0; 62 int __kmp_root_counter = 0; 63 int __kmp_version = 0; 64 65 std::atomic<kmp_int32> __kmp_team_counter = ATOMIC_VAR_INIT(0); 66 std::atomic<kmp_int32> __kmp_task_counter = ATOMIC_VAR_INIT(0); 67 68 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE; 69 #if KMP_USE_MONITOR 70 size_t __kmp_monitor_stksize = 0; // auto adjust 71 #endif 72 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET; 73 int __kmp_stkpadding = KMP_MIN_STKPADDING; 74 75 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR; 76 77 // Barrier method defaults, settings, and strings. 78 // branch factor = 2^branch_bits (only relevant for tree & hyper barrier types) 79 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; 80 /* branch_factor = 4 */ /* hyper2: C78980 */ 81 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; 82 /* branch_factor = 4 */ /* hyper2: C78980 */ 83 84 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar; 85 /* hyper2: C78980 */ 86 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar; 87 /* hyper2: C78980 */ 88 89 kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0}; 90 kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0}; 91 kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar}; 92 kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar}; 93 char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = { 94 "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER" 95 #if KMP_FAST_REDUCTION_BARRIER 96 , 97 "KMP_REDUCTION_BARRIER" 98 #endif // KMP_FAST_REDUCTION_BARRIER 99 }; 100 char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = { 101 "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN" 102 #if KMP_FAST_REDUCTION_BARRIER 103 , 104 "KMP_REDUCTION_BARRIER_PATTERN" 105 #endif // KMP_FAST_REDUCTION_BARRIER 106 }; 107 char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin" 108 #if KMP_FAST_REDUCTION_BARRIER 109 , 110 "reduction" 111 #endif // KMP_FAST_REDUCTION_BARRIER 112 }; 113 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear", "tree", 114 "hyper", "hierarchical"}; 115 116 int __kmp_allThreadsSpecified = 0; 117 size_t __kmp_align_alloc = CACHE_LINE; 118 119 int __kmp_generate_warnings = kmp_warnings_low; 120 int __kmp_reserve_warn = 0; 121 int __kmp_xproc = 0; 122 int __kmp_avail_proc = 0; 123 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE; 124 int __kmp_sys_max_nth = KMP_MAX_NTH; 125 int __kmp_max_nth = 0; 126 int __kmp_cg_max_nth = 0; 127 int __kmp_teams_max_nth = 0; 128 int __kmp_threads_capacity = 0; 129 int __kmp_dflt_team_nth = 0; 130 int __kmp_dflt_team_nth_ub = 0; 131 int __kmp_tp_capacity = 0; 132 int __kmp_tp_cached = 0; 133 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF; 134 int __kmp_dflt_max_active_levels = 1; // Nesting off by default 135 bool __kmp_dflt_max_active_levels_set = false; // Don't override set value 136 #if KMP_NESTED_HOT_TEAMS 137 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */ 138 /* 1 - keep extra threads when reduced */ 139 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */ 140 #endif 141 enum library_type __kmp_library = library_none; 142 enum sched_type __kmp_sched = 143 kmp_sch_default; /* scheduling method for runtime scheduling */ 144 enum sched_type __kmp_static = 145 kmp_sch_static_greedy; /* default static scheduling method */ 146 enum sched_type __kmp_guided = 147 kmp_sch_guided_iterative_chunked; /* default guided scheduling method */ 148 enum sched_type __kmp_auto = 149 kmp_sch_guided_analytical_chunked; /* default auto scheduling method */ 150 #if KMP_USE_HIER_SCHED 151 int __kmp_dispatch_hand_threading = 0; 152 int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1]; 153 int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1]; 154 kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL}; 155 #endif 156 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; 157 #if KMP_USE_MONITOR 158 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS; 159 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME, 160 KMP_MIN_MONITOR_WAKEUPS); 161 #endif 162 #ifdef KMP_ADJUST_BLOCKTIME 163 int __kmp_zero_bt = FALSE; 164 #endif /* KMP_ADJUST_BLOCKTIME */ 165 #ifdef KMP_DFLT_NTH_CORES 166 int __kmp_ncores = 0; 167 #endif 168 int __kmp_chunk = 0; 169 int __kmp_abort_delay = 0; 170 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID) 171 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */ 172 int __kmp_adjust_gtid_mode = FALSE; 173 #elif KMP_OS_WINDOWS 174 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */ 175 int __kmp_adjust_gtid_mode = FALSE; 176 #else 177 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */ 178 int __kmp_adjust_gtid_mode = TRUE; 179 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */ 180 #ifdef KMP_TDATA_GTID 181 KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE; 182 #endif /* KMP_TDATA_GTID */ 183 int __kmp_tls_gtid_min = INT_MAX; 184 int __kmp_foreign_tp = TRUE; 185 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 186 int __kmp_inherit_fp_control = TRUE; 187 kmp_int16 __kmp_init_x87_fpu_control_word = 0; 188 kmp_uint32 __kmp_init_mxcsr = 0; 189 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 190 191 #ifdef USE_LOAD_BALANCE 192 double __kmp_load_balance_interval = 1.0; 193 #endif /* USE_LOAD_BALANCE */ 194 195 kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0}; 196 197 #if KMP_USE_ADAPTIVE_LOCKS 198 199 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = { 200 1, 1024}; // TODO: tune it! 201 202 #if KMP_DEBUG_ADAPTIVE_LOCKS 203 const char *__kmp_speculative_statsfile = "-"; 204 #endif 205 206 #endif // KMP_USE_ADAPTIVE_LOCKS 207 208 int __kmp_display_env = FALSE; 209 int __kmp_display_env_verbose = FALSE; 210 int __kmp_omp_cancellation = FALSE; 211 212 #if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT 213 int __kmp_user_level_mwait = FALSE; 214 int __kmp_umwait_enabled = FALSE; 215 int __kmp_mwait_enabled = FALSE; 216 int __kmp_mwait_hints = 0; 217 #endif 218 219 /* map OMP 3.0 schedule types with our internal schedule types */ 220 enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext + 221 kmp_sched_upper_std - kmp_sched_lower - 2] = { 222 kmp_sch_static_chunked, // ==> kmp_sched_static = 1 223 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2 224 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3 225 kmp_sch_auto, // ==> kmp_sched_auto = 4 226 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101 227 // will likely not be used, introduced here just to debug the code 228 // of public intel extension schedules 229 }; 230 231 #if KMP_OS_LINUX 232 enum clock_function_type __kmp_clock_function; 233 int __kmp_clock_function_param; 234 #endif /* KMP_OS_LINUX */ 235 236 #if KMP_MIC_SUPPORTED 237 enum mic_type __kmp_mic_type = non_mic; 238 #endif 239 240 #if KMP_AFFINITY_SUPPORTED 241 242 KMPAffinity *__kmp_affinity_dispatch = NULL; 243 244 #if KMP_USE_HWLOC 245 int __kmp_hwloc_error = FALSE; 246 hwloc_topology_t __kmp_hwloc_topology = NULL; 247 int __kmp_numa_detected = FALSE; 248 int __kmp_tile_depth = 0; 249 #endif 250 251 #if KMP_OS_WINDOWS 252 #if KMP_GROUP_AFFINITY 253 int __kmp_num_proc_groups = 1; 254 #endif /* KMP_GROUP_AFFINITY */ 255 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL; 256 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL; 257 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL; 258 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL; 259 #endif /* KMP_OS_WINDOWS */ 260 261 size_t __kmp_affin_mask_size = 0; 262 enum affinity_type __kmp_affinity_type = affinity_default; 263 enum affinity_gran __kmp_affinity_gran = affinity_gran_default; 264 int __kmp_affinity_gran_levels = -1; 265 int __kmp_affinity_dups = TRUE; 266 enum affinity_top_method __kmp_affinity_top_method = 267 affinity_top_method_default; 268 int __kmp_affinity_compact = 0; 269 int __kmp_affinity_offset = 0; 270 int __kmp_affinity_verbose = FALSE; 271 int __kmp_affinity_warnings = TRUE; 272 int __kmp_affinity_respect_mask = affinity_respect_mask_default; 273 char *__kmp_affinity_proclist = NULL; 274 kmp_affin_mask_t *__kmp_affinity_masks = NULL; 275 unsigned __kmp_affinity_num_masks = 0; 276 277 char *__kmp_cpuinfo_file = NULL; 278 279 #endif /* KMP_AFFINITY_SUPPORTED */ 280 281 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0}; 282 int __kmp_affinity_num_places = 0; 283 int __kmp_display_affinity = FALSE; 284 char *__kmp_affinity_format = NULL; 285 286 kmp_hws_item_t __kmp_hws_socket = {0, 0}; 287 kmp_hws_item_t __kmp_hws_node = {0, 0}; 288 kmp_hws_item_t __kmp_hws_tile = {0, 0}; 289 kmp_hws_item_t __kmp_hws_core = {0, 0}; 290 kmp_hws_item_t __kmp_hws_proc = {0, 0}; 291 int __kmp_hws_requested = 0; 292 int __kmp_hws_abs_flag = 0; // absolute or per-item number requested 293 294 kmp_int32 __kmp_default_device = 0; 295 296 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams; 297 kmp_int32 __kmp_max_task_priority = 0; 298 kmp_uint64 __kmp_taskloop_min_tasks = 0; 299 300 int __kmp_memkind_available = 0; 301 omp_allocator_handle_t const omp_null_allocator = NULL; 302 omp_allocator_handle_t const omp_default_mem_alloc = 303 (omp_allocator_handle_t const)1; 304 omp_allocator_handle_t const omp_large_cap_mem_alloc = 305 (omp_allocator_handle_t const)2; 306 omp_allocator_handle_t const omp_const_mem_alloc = 307 (omp_allocator_handle_t const)3; 308 omp_allocator_handle_t const omp_high_bw_mem_alloc = 309 (omp_allocator_handle_t const)4; 310 omp_allocator_handle_t const omp_low_lat_mem_alloc = 311 (omp_allocator_handle_t const)5; 312 omp_allocator_handle_t const omp_cgroup_mem_alloc = 313 (omp_allocator_handle_t const)6; 314 omp_allocator_handle_t const omp_pteam_mem_alloc = 315 (omp_allocator_handle_t const)7; 316 omp_allocator_handle_t const omp_thread_mem_alloc = 317 (omp_allocator_handle_t const)8; 318 omp_allocator_handle_t const kmp_max_mem_alloc = 319 (omp_allocator_handle_t const)1024; 320 omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc; 321 322 omp_memspace_handle_t const omp_default_mem_space = 323 (omp_memspace_handle_t const)0; 324 omp_memspace_handle_t const omp_large_cap_mem_space = 325 (omp_memspace_handle_t const)1; 326 omp_memspace_handle_t const omp_const_mem_space = 327 (omp_memspace_handle_t const)2; 328 omp_memspace_handle_t const omp_high_bw_mem_space = 329 (omp_memspace_handle_t const)3; 330 omp_memspace_handle_t const omp_low_lat_mem_space = 331 (omp_memspace_handle_t const)4; 332 333 /* This check ensures that the compiler is passing the correct data type for the 334 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is 335 not a 4-byte type, then give an error message about a non-positive length 336 array pointing here. If that happens, the kmp_tasking_flags_t structure must 337 be redefined to have exactly 32 bits. */ 338 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4); 339 340 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */ 341 int __kmp_enable_task_throttling = 1; 342 343 #ifdef DEBUG_SUSPEND 344 int __kmp_suspend_count = 0; 345 #endif 346 347 int __kmp_settings = FALSE; 348 int __kmp_duplicate_library_ok = 0; 349 #if USE_ITT_BUILD 350 int __kmp_forkjoin_frames = 1; 351 int __kmp_forkjoin_frames_mode = 3; 352 #endif 353 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method = 354 reduction_method_not_defined; 355 int __kmp_determ_red = FALSE; 356 357 #ifdef KMP_DEBUG 358 int kmp_a_debug = 0; 359 int kmp_b_debug = 0; 360 int kmp_c_debug = 0; 361 int kmp_d_debug = 0; 362 int kmp_e_debug = 0; 363 int kmp_f_debug = 0; 364 int kmp_diag = 0; 365 #endif 366 367 /* For debug information logging using rotating buffer */ 368 int __kmp_debug_buf = 369 FALSE; /* TRUE means use buffer, FALSE means print to stderr */ 370 int __kmp_debug_buf_lines = 371 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */ 372 int __kmp_debug_buf_chars = 373 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */ 374 int __kmp_debug_buf_atomic = 375 FALSE; /* TRUE means use atomic update of buffer entry pointer */ 376 377 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */ 378 std::atomic<int> __kmp_debug_count = 379 ATOMIC_VAR_INIT(0); /* number of lines printed in buffer so far */ 380 int __kmp_debug_buf_warn_chars = 381 0; /* Keep track of char increase recommended in warnings */ 382 /* end rotating debug buffer */ 383 384 #ifdef KMP_DEBUG 385 int __kmp_par_range; /* +1 => only go par for constructs in range */ 386 /* -1 => only go par for constructs outside range */ 387 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'}; 388 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'}; 389 int __kmp_par_range_lb = 0; 390 int __kmp_par_range_ub = INT_MAX; 391 #endif /* KMP_DEBUG */ 392 393 /* For printing out dynamic storage map for threads and teams */ 394 int __kmp_storage_map = 395 FALSE; /* True means print storage map for threads and teams */ 396 int __kmp_storage_map_verbose = 397 FALSE; /* True means storage map includes placement info */ 398 int __kmp_storage_map_verbose_specified = FALSE; 399 /* Initialize the library data structures when we fork a child process, defaults 400 * to TRUE */ 401 int __kmp_need_register_atfork = 402 TRUE; /* At initialization, call pthread_atfork to install fork handler */ 403 int __kmp_need_register_atfork_specified = TRUE; 404 405 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */ 406 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */ 407 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */ 408 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */ 409 410 // From KMP_USE_YIELD: 411 // 0 = never yield; 412 // 1 = always yield (default); 413 // 2 = yield only if oversubscribed 414 kmp_int32 __kmp_use_yield = 1; 415 // This will be 1 if KMP_USE_YIELD environment variable was set explicitly 416 kmp_int32 __kmp_use_yield_exp_set = 0; 417 418 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT; 419 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT; 420 421 /* ------------------------------------------------------ */ 422 /* STATE mostly syncronized with global lock */ 423 /* data written to rarely by masters, read often by workers */ 424 /* TODO: None of this global padding stuff works consistently because the order 425 of declaration is not necessarily correlated to storage order. To fix this, 426 all the important globals must be put in a big structure instead. */ 427 KMP_ALIGN_CACHE 428 kmp_info_t **__kmp_threads = NULL; 429 kmp_root_t **__kmp_root = NULL; 430 431 /* data read/written to often by masters */ 432 KMP_ALIGN_CACHE 433 volatile int __kmp_nth = 0; 434 volatile int __kmp_all_nth = 0; 435 volatile kmp_info_t *__kmp_thread_pool = NULL; 436 volatile kmp_team_t *__kmp_team_pool = NULL; 437 438 KMP_ALIGN_CACHE 439 std::atomic<int> __kmp_thread_pool_active_nth = ATOMIC_VAR_INIT(0); 440 441 /* ------------------------------------------------- 442 * GLOBAL/ROOT STATE */ 443 KMP_ALIGN_CACHE 444 kmp_global_t __kmp_global; 445 446 /* ----------------------------------------------- */ 447 /* GLOBAL SYNCHRONIZATION LOCKS */ 448 /* TODO verify the need for these locks and if they need to be global */ 449 450 #if KMP_USE_INTERNODE_ALIGNMENT 451 /* Multinode systems have larger cache line granularity which can cause 452 * false sharing if the alignment is not large enough for these locks */ 453 KMP_ALIGN_CACHE_INTERNODE 454 455 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */ 456 KMP_ALIGN_CACHE_INTERNODE 457 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */ 458 KMP_ALIGN_CACHE_INTERNODE 459 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */ 460 #if KMP_USE_MONITOR 461 /* control monitor thread creation */ 462 KMP_ALIGN_CACHE_INTERNODE 463 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock); 464 #endif 465 /* used for the hack to allow threadprivate cache and __kmp_threads expansion 466 to co-exist */ 467 KMP_ALIGN_CACHE_INTERNODE 468 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock); 469 470 KMP_ALIGN_CACHE_INTERNODE 471 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */ 472 KMP_ALIGN_CACHE_INTERNODE 473 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 474 KMP_ALIGN_CACHE_INTERNODE 475 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */ 476 #else 477 KMP_ALIGN_CACHE 478 479 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */ 480 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */ 481 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */ 482 #if KMP_USE_MONITOR 483 /* control monitor thread creation */ 484 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock); 485 #endif 486 /* used for the hack to allow threadprivate cache and __kmp_threads expansion 487 to co-exist */ 488 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock); 489 490 KMP_ALIGN(128) 491 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */ 492 KMP_ALIGN(128) 493 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 494 KMP_ALIGN(128) 495 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */ 496 #endif 497 498 /* ----------------------------------------------- */ 499 500 #if KMP_HANDLE_SIGNALS 501 /* Signal handling is disabled by default, because it confuses users: In case of 502 sigsegv (or other trouble) in user code signal handler catches the signal, 503 which then "appears" in the monitor thread (when the monitor executes raise() 504 function). Users see signal in the monitor thread and blame OpenMP RTL. 505 506 Grant said signal handling required on some older OSes (Irix?) supported by 507 KAI, because bad applications hung but not aborted. Currently it is not a 508 problem for Linux* OS, OS X* and Windows* OS. 509 510 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm 511 putting the default back for now to see if that fixes hangs on those 512 machines. 513 514 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of 515 stack backtrace when program is aborting, but the code is not signal-safe. 516 When multiple signals raised at the same time (which occurs in dynamic 517 negative tests because all the worker threads detects the same error), 518 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided 519 by Steve R., and will be available soon. */ 520 int __kmp_handle_signals = FALSE; 521 #endif 522 523 #ifdef DEBUG_SUSPEND 524 int get_suspend_count_(void) { 525 int count = __kmp_suspend_count; 526 __kmp_suspend_count = 0; 527 return count; 528 } 529 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; } 530 #endif 531 532 // Symbols for MS mutual detection. 533 int _You_must_link_with_exactly_one_OpenMP_library = 1; 534 int _You_must_link_with_Intel_OpenMP_library = 1; 535 #if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4) 536 int _You_must_link_with_Microsoft_OpenMP_library = 1; 537 #endif 538 539 kmp_target_offload_kind_t __kmp_target_offload = tgt_default; 540 541 // OMP Pause Resources 542 kmp_pause_status_t __kmp_pause_status = kmp_not_paused; 543 544 // end of file // 545