1 /* 2 * kmp_global.cpp -- KPTS global variables for runtime support library 3 */ 4 5 6 //===----------------------------------------------------------------------===// 7 // 8 // The LLVM Compiler Infrastructure 9 // 10 // This file is dual licensed under the MIT and the University of Illinois Open 11 // Source Licenses. See LICENSE.txt for details. 12 // 13 //===----------------------------------------------------------------------===// 14 15 16 #include "kmp.h" 17 #include "kmp_affinity.h" 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 __thread 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 #if KMP_USE_MONITOR 50 volatile int __kmp_init_monitor = 51 0; /* 1 - launched, 2 - actually started (Windows* OS only) */ 52 #endif 53 volatile int __kmp_init_user_locks = FALSE; 54 55 /* list of address of allocated caches for commons */ 56 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL; 57 58 int __kmp_init_counter = 0; 59 int __kmp_root_counter = 0; 60 int __kmp_version = 0; 61 62 volatile kmp_uint32 __kmp_team_counter = 0; 63 volatile kmp_uint32 __kmp_task_counter = 0; 64 65 unsigned int __kmp_init_wait = 66 KMP_DEFAULT_INIT_WAIT; /* initial number of spin-tests */ 67 unsigned int __kmp_next_wait = 68 KMP_DEFAULT_NEXT_WAIT; /* susequent number of spin-tests */ 69 70 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE; 71 #if KMP_USE_MONITOR 72 size_t __kmp_monitor_stksize = 0; // auto adjust 73 #endif 74 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET; 75 int __kmp_stkpadding = KMP_MIN_STKPADDING; 76 77 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR; 78 79 // Barrier method defaults, settings, and strings. 80 // branch factor = 2^branch_bits (only relevant for tree & hyper barrier types) 81 #if KMP_ARCH_X86_64 82 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; 83 /* branch_factor = 4 */ /* hyper2: C78980 */ 84 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; 85 /* branch_factor = 4 */ /* hyper2: C78980 */ 86 #else 87 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; 88 /* branch_factor = 4 */ /* communication in core for MIC */ 89 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; 90 /* branch_factor = 4 */ /* communication in core for MIC */ 91 #endif // KMP_ARCH_X86_64 92 #if KMP_ARCH_X86_64 93 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */ 94 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = 95 bp_hyper_bar; /* hyper2: C78980 */ 96 #else 97 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_linear_bar; 98 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_linear_bar; 99 #endif 100 kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0}; 101 kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0}; 102 kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar}; 103 kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar}; 104 char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = { 105 "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER" 106 #if KMP_FAST_REDUCTION_BARRIER 107 , 108 "KMP_REDUCTION_BARRIER" 109 #endif // KMP_FAST_REDUCTION_BARRIER 110 }; 111 char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = { 112 "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN" 113 #if KMP_FAST_REDUCTION_BARRIER 114 , 115 "KMP_REDUCTION_BARRIER_PATTERN" 116 #endif // KMP_FAST_REDUCTION_BARRIER 117 }; 118 char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin" 119 #if KMP_FAST_REDUCTION_BARRIER 120 , 121 "reduction" 122 #endif // KMP_FAST_REDUCTION_BARRIER 123 }; 124 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear", "tree", 125 "hyper", "hierarchical"}; 126 127 int __kmp_allThreadsSpecified = 0; 128 size_t __kmp_align_alloc = CACHE_LINE; 129 130 131 int __kmp_generate_warnings = kmp_warnings_low; 132 int __kmp_reserve_warn = 0; 133 int __kmp_xproc = 0; 134 int __kmp_avail_proc = 0; 135 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE; 136 int __kmp_sys_max_nth = KMP_MAX_NTH; 137 int __kmp_max_nth = 0; 138 int __kmp_threads_capacity = 0; 139 int __kmp_dflt_team_nth = 0; 140 int __kmp_dflt_team_nth_ub = 0; 141 int __kmp_tp_capacity = 0; 142 int __kmp_tp_cached = 0; 143 int __kmp_dflt_nested = FALSE; 144 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF; 145 int __kmp_dflt_max_active_levels = 146 KMP_MAX_ACTIVE_LEVELS_LIMIT; /* max_active_levels limit */ 147 #if KMP_NESTED_HOT_TEAMS 148 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */ 149 /* 1 - keep extra threads when reduced */ 150 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */ 151 #endif 152 enum library_type __kmp_library = library_none; 153 enum sched_type __kmp_sched = 154 kmp_sch_default; /* scheduling method for runtime scheduling */ 155 enum sched_type __kmp_static = 156 kmp_sch_static_greedy; /* default static scheduling method */ 157 enum sched_type __kmp_guided = 158 kmp_sch_guided_iterative_chunked; /* default guided scheduling method */ 159 enum sched_type __kmp_auto = 160 kmp_sch_guided_analytical_chunked; /* default auto scheduling method */ 161 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; 162 #if KMP_USE_MONITOR 163 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS; 164 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME, 165 KMP_MIN_MONITOR_WAKEUPS); 166 #endif 167 #ifdef KMP_ADJUST_BLOCKTIME 168 int __kmp_zero_bt = FALSE; 169 #endif /* KMP_ADJUST_BLOCKTIME */ 170 #ifdef KMP_DFLT_NTH_CORES 171 int __kmp_ncores = 0; 172 #endif 173 int __kmp_chunk = 0; 174 int __kmp_abort_delay = 0; 175 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID) 176 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */ 177 int __kmp_adjust_gtid_mode = FALSE; 178 #elif KMP_OS_WINDOWS 179 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */ 180 int __kmp_adjust_gtid_mode = FALSE; 181 #else 182 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */ 183 int __kmp_adjust_gtid_mode = TRUE; 184 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */ 185 #ifdef KMP_TDATA_GTID 186 #if KMP_OS_WINDOWS 187 __declspec(thread) int __kmp_gtid = KMP_GTID_DNE; 188 #else 189 __thread int __kmp_gtid = KMP_GTID_DNE; 190 #endif /* KMP_OS_WINDOWS - workaround because Intel(R) Many Integrated Core \ 191 compiler 20110316 doesn't accept __declspec */ 192 #endif /* KMP_TDATA_GTID */ 193 int __kmp_tls_gtid_min = INT_MAX; 194 int __kmp_foreign_tp = TRUE; 195 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 196 int __kmp_inherit_fp_control = TRUE; 197 kmp_int16 __kmp_init_x87_fpu_control_word = 0; 198 kmp_uint32 __kmp_init_mxcsr = 0; 199 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 200 201 #ifdef USE_LOAD_BALANCE 202 double __kmp_load_balance_interval = 1.0; 203 #endif /* USE_LOAD_BALANCE */ 204 205 kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0}; 206 207 #if KMP_USE_ADAPTIVE_LOCKS 208 209 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = { 210 1, 1024}; // TODO: tune it! 211 212 #if KMP_DEBUG_ADAPTIVE_LOCKS 213 char *__kmp_speculative_statsfile = "-"; 214 #endif 215 216 #endif // KMP_USE_ADAPTIVE_LOCKS 217 218 #if OMP_40_ENABLED 219 int __kmp_display_env = FALSE; 220 int __kmp_display_env_verbose = FALSE; 221 int __kmp_omp_cancellation = FALSE; 222 #endif 223 224 /* map OMP 3.0 schedule types with our internal schedule types */ 225 enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext + 226 kmp_sched_upper_std - kmp_sched_lower - 2] = { 227 kmp_sch_static_chunked, // ==> kmp_sched_static = 1 228 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2 229 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3 230 kmp_sch_auto, // ==> kmp_sched_auto = 4 231 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101 232 // will likely not be used, introduced here just to debug the code 233 // of public intel extension schedules 234 }; 235 236 #if KMP_OS_LINUX 237 enum clock_function_type __kmp_clock_function; 238 int __kmp_clock_function_param; 239 #endif /* KMP_OS_LINUX */ 240 241 #if KMP_MIC_SUPPORTED 242 enum mic_type __kmp_mic_type = non_mic; 243 #endif 244 245 #if KMP_AFFINITY_SUPPORTED 246 247 KMPAffinity *__kmp_affinity_dispatch = NULL; 248 249 #if KMP_USE_HWLOC 250 int __kmp_hwloc_error = FALSE; 251 hwloc_topology_t __kmp_hwloc_topology = NULL; 252 #endif 253 254 #if KMP_OS_WINDOWS 255 #if KMP_GROUP_AFFINITY 256 int __kmp_num_proc_groups = 1; 257 #endif /* KMP_GROUP_AFFINITY */ 258 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL; 259 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL; 260 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL; 261 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL; 262 #endif /* KMP_OS_WINDOWS */ 263 264 size_t __kmp_affin_mask_size = 0; 265 enum affinity_type __kmp_affinity_type = affinity_default; 266 enum affinity_gran __kmp_affinity_gran = affinity_gran_default; 267 int __kmp_affinity_gran_levels = -1; 268 int __kmp_affinity_dups = TRUE; 269 enum affinity_top_method __kmp_affinity_top_method = 270 affinity_top_method_default; 271 int __kmp_affinity_compact = 0; 272 int __kmp_affinity_offset = 0; 273 int __kmp_affinity_verbose = FALSE; 274 int __kmp_affinity_warnings = TRUE; 275 int __kmp_affinity_respect_mask = affinity_respect_mask_default; 276 char *__kmp_affinity_proclist = NULL; 277 kmp_affin_mask_t *__kmp_affinity_masks = NULL; 278 unsigned __kmp_affinity_num_masks = 0; 279 280 char const *__kmp_cpuinfo_file = NULL; 281 282 #endif /* KMP_AFFINITY_SUPPORTED */ 283 284 #if OMP_40_ENABLED 285 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0}; 286 int __kmp_affinity_num_places = 0; 287 #endif 288 289 kmp_hws_item_t __kmp_hws_socket = {0, 0}; 290 kmp_hws_item_t __kmp_hws_node = {0, 0}; 291 kmp_hws_item_t __kmp_hws_tile = {0, 0}; 292 kmp_hws_item_t __kmp_hws_core = {0, 0}; 293 kmp_hws_item_t __kmp_hws_proc = {0, 0}; 294 int __kmp_hws_requested = 0; 295 int __kmp_hws_abs_flag = 0; // absolute or per-item number requested 296 297 #if OMP_40_ENABLED 298 kmp_int32 __kmp_default_device = 0; 299 #endif 300 301 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams; 302 #if OMP_45_ENABLED 303 kmp_int32 __kmp_max_task_priority = 0; 304 #endif 305 306 /* This check ensures that the compiler is passing the correct data type for the 307 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is 308 not a 4-byte type, then give an error message about a non-positive length 309 array pointing here. If that happens, the kmp_tasking_flags_t structure must 310 be redefined to have exactly 32 bits. */ 311 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4); 312 313 kmp_int32 __kmp_task_stealing_constraint = 314 1; /* Constrain task stealing by default */ 315 316 #ifdef DEBUG_SUSPEND 317 int __kmp_suspend_count = 0; 318 #endif 319 320 int __kmp_settings = FALSE; 321 int __kmp_duplicate_library_ok = 0; 322 #if USE_ITT_BUILD 323 int __kmp_forkjoin_frames = 1; 324 int __kmp_forkjoin_frames_mode = 3; 325 #endif 326 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method = 327 reduction_method_not_defined; 328 int __kmp_determ_red = FALSE; 329 330 #ifdef KMP_DEBUG 331 int kmp_a_debug = 0; 332 int kmp_b_debug = 0; 333 int kmp_c_debug = 0; 334 int kmp_d_debug = 0; 335 int kmp_e_debug = 0; 336 int kmp_f_debug = 0; 337 int kmp_diag = 0; 338 #endif 339 340 /* For debug information logging using rotating buffer */ 341 int __kmp_debug_buf = 342 FALSE; /* TRUE means use buffer, FALSE means print to stderr */ 343 int __kmp_debug_buf_lines = 344 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */ 345 int __kmp_debug_buf_chars = 346 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */ 347 int __kmp_debug_buf_atomic = 348 FALSE; /* TRUE means use atomic update of buffer entry pointer */ 349 350 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */ 351 int __kmp_debug_count = 352 0; /* Counter for number of lines printed in buffer so far */ 353 int __kmp_debug_buf_warn_chars = 354 0; /* Keep track of char increase recommended in warnings */ 355 /* end rotating debug buffer */ 356 357 #ifdef KMP_DEBUG 358 int __kmp_par_range; /* +1 => only go par for constructs in range */ 359 /* -1 => only go par for constructs outside range */ 360 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'}; 361 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'}; 362 int __kmp_par_range_lb = 0; 363 int __kmp_par_range_ub = INT_MAX; 364 #endif /* KMP_DEBUG */ 365 366 /* For printing out dynamic storage map for threads and teams */ 367 int __kmp_storage_map = 368 FALSE; /* True means print storage map for threads and teams */ 369 int __kmp_storage_map_verbose = 370 FALSE; /* True means storage map includes placement info */ 371 int __kmp_storage_map_verbose_specified = FALSE; 372 /* Initialize the library data structures when we fork a child process, defaults 373 * to TRUE */ 374 int __kmp_need_register_atfork = 375 TRUE; /* At initialization, call pthread_atfork to install fork handler */ 376 int __kmp_need_register_atfork_specified = TRUE; 377 378 int __kmp_env_chunk = FALSE; /* KMP_CHUNK specified? */ 379 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */ 380 int __kmp_env_omp_stksize = FALSE; /* OMP_STACKSIZE specified? */ 381 int __kmp_env_all_threads = 382 FALSE; /* KMP_ALL_THREADS or KMP_MAX_THREADS specified? */ 383 int __kmp_env_omp_all_threads = FALSE; /* OMP_THREAD_LIMIT specified? */ 384 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */ 385 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */ 386 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */ 387 388 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT; 389 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT; 390 391 #if KMP_USE_MONITOR 392 kmp_uint32 __kmp_yielding_on = 1; 393 #endif 394 #if KMP_OS_CNK 395 kmp_uint32 __kmp_yield_cycle = 0; 396 #else 397 kmp_uint32 __kmp_yield_cycle = 1; /* Yield-cycle is on by default */ 398 #endif 399 kmp_int32 __kmp_yield_on_count = 400 10; /* By default, yielding is on for 10 monitor periods. */ 401 kmp_int32 __kmp_yield_off_count = 402 1; /* By default, yielding is off for 1 monitor periods. */ 403 404 /* ------------------------------------------------------ */ 405 /* STATE mostly syncronized with global lock */ 406 /* data written to rarely by masters, read often by workers */ 407 /* TODO: None of this global padding stuff works consistently because the order 408 of declaration is not necessarily correlated to storage order. To fix this, 409 all the important globals must be put in a big structure instead. */ 410 KMP_ALIGN_CACHE 411 kmp_info_t **__kmp_threads = NULL; 412 kmp_root_t **__kmp_root = NULL; 413 414 /* data read/written to often by masters */ 415 KMP_ALIGN_CACHE 416 volatile int __kmp_nth = 0; 417 volatile int __kmp_all_nth = 0; 418 int __kmp_thread_pool_nth = 0; 419 volatile kmp_info_t *__kmp_thread_pool = NULL; 420 volatile kmp_team_t *__kmp_team_pool = NULL; 421 422 KMP_ALIGN_CACHE 423 volatile int __kmp_thread_pool_active_nth = 0; 424 425 /* ------------------------------------------------- 426 * GLOBAL/ROOT STATE */ 427 KMP_ALIGN_CACHE 428 kmp_global_t __kmp_global = {{0}}; 429 430 /* ----------------------------------------------- */ 431 /* GLOBAL SYNCHRONIZATION LOCKS */ 432 /* TODO verify the need for these locks and if they need to be global */ 433 434 #if KMP_USE_INTERNODE_ALIGNMENT 435 /* Multinode systems have larger cache line granularity which can cause 436 * false sharing if the alignment is not large enough for these locks */ 437 KMP_ALIGN_CACHE_INTERNODE 438 439 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( 440 __kmp_initz_lock); /* Control initializations */ 441 KMP_ALIGN_CACHE_INTERNODE 442 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */ 443 KMP_ALIGN_CACHE_INTERNODE 444 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */ 445 #if KMP_USE_MONITOR 446 KMP_ALIGN_CACHE_INTERNODE 447 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */ 448 #endif 449 /* used for the hack to allow threadprivate cache and __kmp_threads expansion 450 to co-exist */ 451 KMP_ALIGN_CACHE_INTERNODE 452 kmp_bootstrap_lock_t __kmp_tp_cached_lock; 453 454 KMP_ALIGN_CACHE_INTERNODE 455 kmp_lock_t __kmp_global_lock; /* Control OS/global access */ 456 KMP_ALIGN_CACHE_INTERNODE 457 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 458 KMP_ALIGN_CACHE_INTERNODE 459 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */ 460 #else 461 KMP_ALIGN_CACHE 462 463 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( 464 __kmp_initz_lock); /* Control initializations */ 465 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */ 466 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */ 467 #if KMP_USE_MONITOR 468 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */ 469 #endif 470 /* used for the hack to allow threadprivate cache and __kmp_threads expansion 471 to co-exist */ 472 kmp_bootstrap_lock_t __kmp_tp_cached_lock; 473 474 KMP_ALIGN(128) 475 kmp_lock_t __kmp_global_lock; /* Control OS/global access */ 476 KMP_ALIGN(128) 477 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 478 KMP_ALIGN(128) 479 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */ 480 #endif 481 482 /* ----------------------------------------------- */ 483 484 #if KMP_HANDLE_SIGNALS 485 /* Signal handling is disabled by default, because it confuses users: In case of 486 sigsegv (or other trouble) in user code signal handler catches the signal, 487 which then "appears" in the monitor thread (when the monitor executes raise() 488 function). Users see signal in the monitor thread and blame OpenMP RTL. 489 490 Grant said signal handling required on some older OSes (Irix?) supported by 491 KAI, because bad applications hung but not aborted. Currently it is not a 492 problem for Linux* OS, OS X* and Windows* OS. 493 494 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm 495 putting the default back for now to see if that fixes hangs on those 496 machines. 497 498 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of 499 stack backtrace when program is aborting, but the code is not signal-safe. 500 When multiple signals raised at the same time (which occurs in dynamic 501 negative tests because all the worker threads detects the same error), 502 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided 503 by Steve R., and will be available soon. */ 504 int __kmp_handle_signals = FALSE; 505 #endif 506 507 /* ----------------------------------------------- */ 508 #ifdef BUILD_TV 509 kmp_key_t __kmp_tv_key = 0; 510 #endif 511 512 /* ------------------------------------------------------------------------ */ 513 514 #ifdef DEBUG_SUSPEND 515 int get_suspend_count_(void) { 516 int count = __kmp_suspend_count; 517 __kmp_suspend_count = 0; 518 return count; 519 } 520 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; } 521 #endif 522 523 // Symbols for MS mutual detection. 524 int _You_must_link_with_exactly_one_OpenMP_library = 1; 525 int _You_must_link_with_Intel_OpenMP_library = 1; 526 #if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4) 527 int _You_must_link_with_Microsoft_OpenMP_library = 1; 528 #endif 529 530 // end of file // 531