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 accumulates all stats produced before __kmp_create_worker is called. 31 kmp_stats_list* __kmp_stats_list; 32 33 // thread local pointer to stats node within list 34 __thread kmp_stats_list* __kmp_stats_thread_ptr = NULL; 35 36 // gives reference tick for all events (considered the 0 tick) 37 tsc_tick_count __kmp_stats_start_time; 38 #endif 39 40 /* ----------------------------------------------------- */ 41 /* INITIALIZATION VARIABLES */ 42 /* they are syncronized to write during init, but read anytime */ 43 volatile int __kmp_init_serial = FALSE; 44 volatile int __kmp_init_gtid = FALSE; 45 volatile int __kmp_init_common = FALSE; 46 volatile int __kmp_init_middle = FALSE; 47 volatile int __kmp_init_parallel = FALSE; 48 #if KMP_USE_MONITOR 49 volatile int __kmp_init_monitor = 0; /* 1 - launched, 2 - actually started (Windows* OS only) */ 50 #endif 51 volatile int __kmp_init_user_locks = FALSE; 52 53 /* list of address of allocated caches for commons */ 54 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL; 55 56 int __kmp_init_counter = 0; 57 int __kmp_root_counter = 0; 58 int __kmp_version = 0; 59 60 volatile kmp_uint32 __kmp_team_counter = 0; 61 volatile kmp_uint32 __kmp_task_counter = 0; 62 63 unsigned int __kmp_init_wait = KMP_DEFAULT_INIT_WAIT; /* initial number of spin-tests */ 64 unsigned int __kmp_next_wait = KMP_DEFAULT_NEXT_WAIT; /* susequent number of spin-tests */ 65 66 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE; 67 #if KMP_USE_MONITOR 68 size_t __kmp_monitor_stksize = 0; // auto adjust 69 #endif 70 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET; 71 int __kmp_stkpadding = KMP_MIN_STKPADDING; 72 73 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR; 74 75 /* Barrier method defaults, settings, and strings */ 76 /* branch factor = 2^branch_bits (only relevant for tree and hyper barrier types) */ 77 #if KMP_ARCH_X86_64 78 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; /* branch_factor = 4 */ /* hyper2: C78980 */ 79 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; /* branch_factor = 4 */ /* hyper2: C78980 */ 80 #else 81 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; /* branch_factor = 4 */ /* communication in core for MIC */ 82 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; /* branch_factor = 4 */ /* communication in core for MIC */ 83 #endif // KMP_ARCH_X86_64 84 #if KMP_ARCH_X86_64 85 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */ 86 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */ 87 #else 88 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_linear_bar; 89 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_linear_bar; 90 #endif 91 kmp_uint32 __kmp_barrier_gather_branch_bits [ bs_last_barrier ] = { 0 }; 92 kmp_uint32 __kmp_barrier_release_branch_bits [ bs_last_barrier ] = { 0 }; 93 kmp_bar_pat_e __kmp_barrier_gather_pattern [ bs_last_barrier ] = { bp_linear_bar }; 94 kmp_bar_pat_e __kmp_barrier_release_pattern [ bs_last_barrier ] = { bp_linear_bar }; 95 char const *__kmp_barrier_branch_bit_env_name [ bs_last_barrier ] = 96 { "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER" 97 #if KMP_FAST_REDUCTION_BARRIER 98 , "KMP_REDUCTION_BARRIER" 99 #endif // KMP_FAST_REDUCTION_BARRIER 100 }; 101 char const *__kmp_barrier_pattern_env_name [ bs_last_barrier ] = 102 { "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN" 103 #if KMP_FAST_REDUCTION_BARRIER 104 , "KMP_REDUCTION_BARRIER_PATTERN" 105 #endif // KMP_FAST_REDUCTION_BARRIER 106 }; 107 char const *__kmp_barrier_type_name [ bs_last_barrier ] = 108 { "plain", "forkjoin" 109 #if KMP_FAST_REDUCTION_BARRIER 110 , "reduction" 111 #endif // KMP_FAST_REDUCTION_BARRIER 112 }; 113 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear","tree","hyper","hierarchical"}; 114 115 int __kmp_allThreadsSpecified = 0; 116 size_t __kmp_align_alloc = CACHE_LINE; 117 118 119 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_threads_capacity = 0; 127 int __kmp_dflt_team_nth = 0; 128 int __kmp_dflt_team_nth_ub = 0; 129 int __kmp_tp_capacity = 0; 130 int __kmp_tp_cached = 0; 131 int __kmp_dflt_nested = FALSE; 132 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF; 133 int __kmp_dflt_max_active_levels = KMP_MAX_ACTIVE_LEVELS_LIMIT; /* max_active_levels limit */ 134 #if KMP_NESTED_HOT_TEAMS 135 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */ 136 /* 1 - keep extra threads when reduced */ 137 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */ 138 #endif 139 enum library_type __kmp_library = library_none; 140 enum sched_type __kmp_sched = kmp_sch_default; /* scheduling method for runtime scheduling */ 141 enum sched_type __kmp_static = kmp_sch_static_greedy; /* default static scheduling method */ 142 enum sched_type __kmp_guided = kmp_sch_guided_iterative_chunked; /* default guided scheduling method */ 143 enum sched_type __kmp_auto = kmp_sch_guided_analytical_chunked; /* default auto scheduling method */ 144 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; 145 #if KMP_USE_MONITOR 146 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS; 147 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME( KMP_DEFAULT_BLOCKTIME, KMP_MIN_MONITOR_WAKEUPS ); 148 #endif 149 #ifdef KMP_ADJUST_BLOCKTIME 150 int __kmp_zero_bt = FALSE; 151 #endif /* KMP_ADJUST_BLOCKTIME */ 152 #ifdef KMP_DFLT_NTH_CORES 153 int __kmp_ncores = 0; 154 #endif 155 int __kmp_chunk = 0; 156 int __kmp_abort_delay = 0; 157 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID) 158 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */ 159 int __kmp_adjust_gtid_mode = FALSE; 160 #elif KMP_OS_WINDOWS 161 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */ 162 int __kmp_adjust_gtid_mode = FALSE; 163 #else 164 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */ 165 int __kmp_adjust_gtid_mode = TRUE; 166 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */ 167 #ifdef KMP_TDATA_GTID 168 #if KMP_OS_WINDOWS 169 __declspec(thread) int __kmp_gtid = KMP_GTID_DNE; 170 #else 171 __thread int __kmp_gtid = KMP_GTID_DNE; 172 #endif /* KMP_OS_WINDOWS - workaround because Intel(R) Many Integrated Core compiler 20110316 doesn't accept __declspec */ 173 #endif /* KMP_TDATA_GTID */ 174 int __kmp_tls_gtid_min = INT_MAX; 175 int __kmp_foreign_tp = TRUE; 176 #if KMP_ARCH_X86 || KMP_ARCH_X86_64 177 int __kmp_inherit_fp_control = TRUE; 178 kmp_int16 __kmp_init_x87_fpu_control_word = 0; 179 kmp_uint32 __kmp_init_mxcsr = 0; 180 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */ 181 182 #ifdef USE_LOAD_BALANCE 183 double __kmp_load_balance_interval = 1.0; 184 #endif /* USE_LOAD_BALANCE */ 185 186 kmp_nested_nthreads_t __kmp_nested_nth = { NULL, 0, 0 }; 187 188 #if KMP_USE_ADAPTIVE_LOCKS 189 190 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = { 1, 1024 }; // TODO: tune it! 191 192 #if KMP_DEBUG_ADAPTIVE_LOCKS 193 char * __kmp_speculative_statsfile = "-"; 194 #endif 195 196 #endif // KMP_USE_ADAPTIVE_LOCKS 197 198 #if OMP_40_ENABLED 199 int __kmp_display_env = FALSE; 200 int __kmp_display_env_verbose = FALSE; 201 int __kmp_omp_cancellation = FALSE; 202 #endif 203 204 /* map OMP 3.0 schedule types with our internal schedule types */ 205 enum sched_type __kmp_sch_map[ kmp_sched_upper - kmp_sched_lower_ext + kmp_sched_upper_std - kmp_sched_lower - 2 ] = { 206 kmp_sch_static_chunked, // ==> kmp_sched_static = 1 207 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2 208 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3 209 kmp_sch_auto, // ==> kmp_sched_auto = 4 210 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101 211 // will likely not used, introduced here just to debug the code 212 // of public intel extension schedules 213 }; 214 215 #if KMP_OS_LINUX 216 enum clock_function_type __kmp_clock_function; 217 int __kmp_clock_function_param; 218 #endif /* KMP_OS_LINUX */ 219 220 #if KMP_ARCH_X86_64 && (KMP_OS_LINUX || KMP_OS_WINDOWS) 221 enum mic_type __kmp_mic_type = non_mic; 222 #endif 223 224 #if KMP_AFFINITY_SUPPORTED 225 226 KMPAffinity* __kmp_affinity_dispatch = NULL; 227 228 # if KMP_USE_HWLOC 229 int __kmp_hwloc_error = FALSE; 230 hwloc_topology_t __kmp_hwloc_topology = NULL; 231 # endif 232 233 # if KMP_OS_WINDOWS 234 # if KMP_GROUP_AFFINITY 235 int __kmp_num_proc_groups = 1; 236 # endif /* KMP_GROUP_AFFINITY */ 237 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL; 238 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL; 239 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL; 240 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL; 241 # endif /* KMP_OS_WINDOWS */ 242 243 size_t __kmp_affin_mask_size = 0; 244 enum affinity_type __kmp_affinity_type = affinity_default; 245 enum affinity_gran __kmp_affinity_gran = affinity_gran_default; 246 int __kmp_affinity_gran_levels = -1; 247 int __kmp_affinity_dups = TRUE; 248 enum affinity_top_method __kmp_affinity_top_method = affinity_top_method_default; 249 int __kmp_affinity_compact = 0; 250 int __kmp_affinity_offset = 0; 251 int __kmp_affinity_verbose = FALSE; 252 int __kmp_affinity_warnings = TRUE; 253 int __kmp_affinity_respect_mask = affinity_respect_mask_default; 254 char * __kmp_affinity_proclist = NULL; 255 kmp_affin_mask_t *__kmp_affinity_masks = NULL; 256 unsigned __kmp_affinity_num_masks = 0; 257 258 char const * __kmp_cpuinfo_file = NULL; 259 260 #endif /* KMP_AFFINITY_SUPPORTED */ 261 262 #if OMP_40_ENABLED 263 kmp_nested_proc_bind_t __kmp_nested_proc_bind = { NULL, 0, 0 }; 264 int __kmp_affinity_num_places = 0; 265 #endif 266 267 kmp_hws_item_t __kmp_hws_socket = {0, 0}; 268 kmp_hws_item_t __kmp_hws_node = {0, 0}; 269 kmp_hws_item_t __kmp_hws_tile = {0, 0}; 270 kmp_hws_item_t __kmp_hws_core = {0, 0}; 271 kmp_hws_item_t __kmp_hws_proc = {0, 0}; 272 int __kmp_hws_requested = 0; 273 int __kmp_hws_abs_flag = 0; // absolute or per-item number requested 274 275 #if OMP_40_ENABLED 276 kmp_int32 __kmp_default_device = 0; 277 #endif 278 279 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams; 280 #if OMP_45_ENABLED 281 kmp_int32 __kmp_max_task_priority = 0; 282 #endif 283 284 /* This check ensures that the compiler is passing the correct data type 285 * for the flags formal parameter of the function kmpc_omp_task_alloc(). 286 * If the type is not a 4-byte type, then give an error message about 287 * a non-positive length array pointing here. If that happens, the 288 * kmp_tasking_flags_t structure must be redefined to have exactly 32 bits. 289 */ 290 KMP_BUILD_ASSERT( sizeof(kmp_tasking_flags_t) == 4 ); 291 292 kmp_int32 __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */ 293 294 #ifdef DEBUG_SUSPEND 295 int __kmp_suspend_count = 0; 296 #endif 297 298 int __kmp_settings = FALSE; 299 int __kmp_duplicate_library_ok = 0; 300 #if USE_ITT_BUILD 301 int __kmp_forkjoin_frames = 1; 302 int __kmp_forkjoin_frames_mode = 3; 303 #endif 304 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method = reduction_method_not_defined; 305 int __kmp_determ_red = FALSE; 306 307 #ifdef KMP_DEBUG 308 int kmp_a_debug = 0; 309 int kmp_b_debug = 0; 310 int kmp_c_debug = 0; 311 int kmp_d_debug = 0; 312 int kmp_e_debug = 0; 313 int kmp_f_debug = 0; 314 int kmp_diag = 0; 315 #endif 316 317 /* For debug information logging using rotating buffer */ 318 int __kmp_debug_buf = FALSE; /* TRUE means use buffer, FALSE means print to stderr */ 319 int __kmp_debug_buf_lines = KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */ 320 int __kmp_debug_buf_chars = KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */ 321 int __kmp_debug_buf_atomic = FALSE; /* TRUE means use atomic update of buffer entry pointer */ 322 323 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */ 324 int __kmp_debug_count = 0; /* Counter for number of lines printed in buffer so far */ 325 int __kmp_debug_buf_warn_chars = 0; /* Keep track of char increase recommended in warnings */ 326 /* end rotating debug buffer */ 327 328 #ifdef KMP_DEBUG 329 int __kmp_par_range; /* +1 => only go par for constructs in range */ 330 /* -1 => only go par for constructs outside range */ 331 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = { '\0' }; 332 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = { '\0' }; 333 int __kmp_par_range_lb = 0; 334 int __kmp_par_range_ub = INT_MAX; 335 #endif /* KMP_DEBUG */ 336 337 /* For printing out dynamic storage map for threads and teams */ 338 int __kmp_storage_map = FALSE; /* True means print storage map for threads and teams */ 339 int __kmp_storage_map_verbose = FALSE; /* True means storage map includes placement info */ 340 int __kmp_storage_map_verbose_specified = FALSE; 341 /* Initialize the library data structures when we fork a child process, defaults to TRUE */ 342 int __kmp_need_register_atfork = TRUE; /* At initialization, call pthread_atfork to install fork handler */ 343 int __kmp_need_register_atfork_specified = TRUE; 344 345 int __kmp_env_chunk = FALSE; /* KMP_CHUNK specified? */ 346 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */ 347 int __kmp_env_omp_stksize = FALSE; /* OMP_STACKSIZE specified? */ 348 int __kmp_env_all_threads = FALSE;/* KMP_ALL_THREADS or KMP_MAX_THREADS specified? */ 349 int __kmp_env_omp_all_threads = FALSE;/* OMP_THREAD_LIMIT specified? */ 350 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */ 351 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */ 352 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */ 353 354 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT; 355 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT; 356 357 #if KMP_USE_MONITOR 358 kmp_uint32 __kmp_yielding_on = 1; 359 #endif 360 #if KMP_OS_CNK 361 kmp_uint32 __kmp_yield_cycle = 0; 362 #else 363 kmp_uint32 __kmp_yield_cycle = 1; /* Yield-cycle is on by default */ 364 #endif 365 kmp_int32 __kmp_yield_on_count = 10; /* By default, yielding is on for 10 monitor periods. */ 366 kmp_int32 __kmp_yield_off_count = 1; /* By default, yielding is off for 1 monitor periods. */ 367 /* ----------------------------------------------------- */ 368 369 370 /* ------------------------------------------------------ */ 371 /* STATE mostly syncronized with global lock */ 372 /* data written to rarely by masters, read often by workers */ 373 /* 374 * SHALL WE EDIT THE COMMENT BELOW IN SOME WAY? 375 * TODO: None of this global padding stuff works consistently because 376 * the order of declaration is not necessarily correlated to storage order. 377 * To fix this, all the important globals must be put in a big structure 378 * instead. 379 */ 380 KMP_ALIGN_CACHE 381 kmp_info_t **__kmp_threads = NULL; 382 kmp_root_t **__kmp_root = NULL; 383 384 /* data read/written to often by masters */ 385 KMP_ALIGN_CACHE 386 volatile int __kmp_nth = 0; 387 volatile int __kmp_all_nth = 0; 388 int __kmp_thread_pool_nth = 0; 389 volatile kmp_info_t *__kmp_thread_pool = NULL; 390 volatile kmp_team_t *__kmp_team_pool = NULL; 391 392 KMP_ALIGN_CACHE 393 volatile int __kmp_thread_pool_active_nth = 0; 394 395 /* ------------------------------------------------- 396 * GLOBAL/ROOT STATE */ 397 KMP_ALIGN_CACHE 398 kmp_global_t __kmp_global = {{ 0 }}; 399 400 /* ----------------------------------------------- */ 401 /* GLOBAL SYNCHRONIZATION LOCKS */ 402 /* TODO verify the need for these locks and if they need to be global */ 403 404 #if KMP_USE_INTERNODE_ALIGNMENT 405 /* Multinode systems have larger cache line granularity which can cause 406 * false sharing if the alignment is not large enough for these locks */ 407 KMP_ALIGN_CACHE_INTERNODE 408 409 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( __kmp_initz_lock ); /* Control initializations */ 410 KMP_ALIGN_CACHE_INTERNODE 411 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */ 412 KMP_ALIGN_CACHE_INTERNODE 413 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */ 414 #if KMP_USE_MONITOR 415 KMP_ALIGN_CACHE_INTERNODE 416 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */ 417 #endif 418 KMP_ALIGN_CACHE_INTERNODE 419 kmp_bootstrap_lock_t __kmp_tp_cached_lock; /* used for the hack to allow threadprivate cache and __kmp_threads expansion to co-exist */ 420 421 KMP_ALIGN_CACHE_INTERNODE 422 kmp_lock_t __kmp_global_lock; /* Control OS/global access */ 423 KMP_ALIGN_CACHE_INTERNODE 424 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 425 KMP_ALIGN_CACHE_INTERNODE 426 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */ 427 #else 428 KMP_ALIGN_CACHE 429 430 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( __kmp_initz_lock ); /* Control initializations */ 431 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */ 432 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */ 433 #if KMP_USE_MONITOR 434 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */ 435 #endif 436 kmp_bootstrap_lock_t __kmp_tp_cached_lock; /* used for the hack to allow threadprivate cache and __kmp_threads expansion to co-exist */ 437 438 KMP_ALIGN(128) 439 kmp_lock_t __kmp_global_lock; /* Control OS/global access */ 440 KMP_ALIGN(128) 441 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */ 442 KMP_ALIGN(128) 443 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */ 444 #endif 445 446 /* ----------------------------------------------- */ 447 448 #if KMP_HANDLE_SIGNALS 449 /* 450 Signal handling is disabled by default, because it confuses users: In case of sigsegv 451 (or other trouble) in user code signal handler catches the signal, which then "appears" in 452 the monitor thread (when the monitor executes raise() function). Users see signal in the 453 monitor thread and blame OpenMP RTL. 454 455 Grant said signal handling required on some older OSes (Irix?) supported by KAI, because 456 bad applications hung but not aborted. Currently it is not a problem for Linux* OS, OS X* and 457 Windows* OS. 458 459 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm putting 460 the default back for now to see if that fixes hangs on those machines. 461 462 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of stack backtrace 463 when program is aborting, but the code is not signal-safe. When multiple signals raised at 464 the same time (which occurs in dynamic negative tests because all the worker threads detects 465 the same error), Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided 466 by Steve R., and will be available soon. 467 */ 468 int __kmp_handle_signals = FALSE; 469 #endif 470 471 /* ----------------------------------------------- */ 472 #ifdef BUILD_TV 473 kmp_key_t __kmp_tv_key = 0; 474 #endif 475 476 /* ------------------------------------------------------------------------ */ 477 /* ------------------------------------------------------------------------ */ 478 479 #ifdef DEBUG_SUSPEND 480 int 481 get_suspend_count_( void ) { 482 int count = __kmp_suspend_count; 483 __kmp_suspend_count = 0; 484 return count; 485 } 486 void 487 set_suspend_count_( int * value ) { 488 __kmp_suspend_count = *value; 489 } 490 #endif 491 492 // Symbols for MS mutual detection. 493 int _You_must_link_with_exactly_one_OpenMP_library = 1; 494 int _You_must_link_with_Intel_OpenMP_library = 1; 495 #if KMP_OS_WINDOWS && ( KMP_VERSION_MAJOR > 4 ) 496 int _You_must_link_with_Microsoft_OpenMP_library = 1; 497 #endif 498 499 // end of file // 500