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