568 lines · cpp
1/*2 * kmp_global.cpp -- KPTS global variables for runtime support library3 */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-exception10//11//===----------------------------------------------------------------------===//12 13#include "kmp.h"14#include "kmp_affinity.h"15#if KMP_USE_HIER_SCHED16#include "kmp_dispatch_hier.h"17#endif18 19kmp_key_t __kmp_gtid_threadprivate_key;20 21#if KMP_ARCH_X86 || KMP_ARCH_X86_6422kmp_cpuinfo_t __kmp_cpuinfo = {0}; // Not initialized23#endif24 25#if KMP_STATS_ENABLED26#include "kmp_stats.h"27// lock for modifying the global __kmp_stats_list28kmp_tas_lock_t __kmp_stats_lock;29 30// global list of per thread stats, the head is a sentinel node which31// 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 list35KMP_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#endif40 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_need_register_serial = TRUE;48volatile int __kmp_init_middle = FALSE;49volatile int __kmp_init_parallel = FALSE;50volatile int __kmp_init_hidden_helper = FALSE;51volatile int __kmp_init_hidden_helper_threads = FALSE;52volatile int __kmp_hidden_helper_team_done = FALSE;53#if KMP_USE_MONITOR54volatile int __kmp_init_monitor =55 0; /* 1 - launched, 2 - actually started (Windows* OS only) */56#endif57volatile int __kmp_init_user_locks = FALSE;58 59/* list of address of allocated caches for commons */60kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;61 62int __kmp_init_counter = 0;63int __kmp_root_counter = 0;64int __kmp_version = 0;65 66std::atomic<kmp_int32> __kmp_team_counter = 0;67std::atomic<kmp_int32> __kmp_task_counter = 0;68 69size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;70#if KMP_USE_MONITOR71size_t __kmp_monitor_stksize = 0; // auto adjust72#endif73size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;74int __kmp_stkpadding = KMP_MIN_STKPADDING;75 76size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR;77 78// Barrier method defaults, settings, and strings.79// branch factor = 2^branch_bits (only relevant for tree & hyper barrier types)80kmp_uint32 __kmp_barrier_gather_bb_dflt = 2;81/* branch_factor = 4 */ /* hyper2: C78980 */82kmp_uint32 __kmp_barrier_release_bb_dflt = 2;83/* branch_factor = 4 */ /* hyper2: C78980 */84 85kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar;86/* hyper2: C78980 */87kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar;88/* hyper2: C78980 */89 90kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0};91kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0};92kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar};93kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar};94char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = {95 "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"96#if KMP_FAST_REDUCTION_BARRIER97 ,98 "KMP_REDUCTION_BARRIER"99#endif // KMP_FAST_REDUCTION_BARRIER100};101char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = {102 "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN"103#if KMP_FAST_REDUCTION_BARRIER104 ,105 "KMP_REDUCTION_BARRIER_PATTERN"106#endif // KMP_FAST_REDUCTION_BARRIER107};108char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin"109#if KMP_FAST_REDUCTION_BARRIER110 ,111 "reduction"112#endif // KMP_FAST_REDUCTION_BARRIER113};114char const *__kmp_barrier_pattern_name[bp_last_bar] = {115 "linear", "tree", "hyper", "hierarchical", "dist"};116 117int __kmp_allThreadsSpecified = 0;118size_t __kmp_align_alloc = CACHE_LINE;119 120int __kmp_generate_warnings = kmp_warnings_low;121int __kmp_reserve_warn = 0;122int __kmp_xproc = 0;123int __kmp_avail_proc = 0;124size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;125int __kmp_sys_max_nth = KMP_MAX_NTH;126int __kmp_max_nth = 0;127int __kmp_cg_max_nth = 0;128int __kmp_task_max_nth = 0;129int __kmp_teams_max_nth = 0;130int __kmp_threads_capacity = 0;131int __kmp_dflt_team_nth = 0;132int __kmp_dflt_team_nth_ub = 0;133int __kmp_tp_capacity = 0;134int __kmp_tp_cached = 0;135int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;136int __kmp_dflt_max_active_levels = 1; // Nesting off by default137bool __kmp_dflt_max_active_levels_set = false; // Don't override set value138int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */139/* 1 - keep extra threads when reduced */140int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */141enum library_type __kmp_library = library_none;142enum sched_type __kmp_sched =143 kmp_sch_default; /* scheduling method for runtime scheduling */144enum sched_type __kmp_static =145 kmp_sch_static_greedy; /* default static scheduling method */146enum sched_type __kmp_guided =147 kmp_sch_guided_iterative_chunked; /* default guided scheduling method */148enum sched_type __kmp_auto =149 kmp_sch_guided_analytical_chunked; /* default auto scheduling method */150#if KMP_USE_HIER_SCHED151int __kmp_dispatch_hand_threading = 0;152int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1];153int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1];154kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL};155#endif156int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; // in microseconds157char __kmp_blocktime_units = 'm'; // Units specified in KMP_BLOCKTIME158bool __kmp_wpolicy_passive = false;159#if KMP_USE_MONITOR160int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;161int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME,162 KMP_MIN_MONITOR_WAKEUPS);163#endif164#ifdef KMP_ADJUST_BLOCKTIME165int __kmp_zero_bt = FALSE;166#endif /* KMP_ADJUST_BLOCKTIME */167#ifdef KMP_DFLT_NTH_CORES168int __kmp_ncores = 0;169#endif170int __kmp_chunk = 0;171int __kmp_force_monotonic = 0;172int __kmp_abort_delay = 0;173#if (KMP_OS_LINUX || KMP_OS_AIX || KMP_OS_SOLARIS) && defined(KMP_TDATA_GTID)174int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */175int __kmp_adjust_gtid_mode = FALSE;176#elif KMP_OS_WINDOWS177int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */178int __kmp_adjust_gtid_mode = FALSE;179#else180int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */181int __kmp_adjust_gtid_mode = TRUE;182#endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */183#ifdef KMP_TDATA_GTID184KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE;185#endif /* KMP_TDATA_GTID */186int __kmp_tls_gtid_min = INT_MAX;187int __kmp_foreign_tp = TRUE;188#if KMP_ARCH_X86 || KMP_ARCH_X86_64189int __kmp_inherit_fp_control = TRUE;190kmp_int16 __kmp_init_x87_fpu_control_word = 0;191kmp_uint32 __kmp_init_mxcsr = 0;192#endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */193 194#ifdef USE_LOAD_BALANCE195double __kmp_load_balance_interval = 1.0;196#endif /* USE_LOAD_BALANCE */197 198kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0};199 200#if KMP_USE_ADAPTIVE_LOCKS201 202kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = {203 1, 1024}; // TODO: tune it!204 205#if KMP_DEBUG_ADAPTIVE_LOCKS206const char *__kmp_speculative_statsfile = "-";207#endif208 209#endif // KMP_USE_ADAPTIVE_LOCKS210 211int __kmp_display_env = FALSE;212int __kmp_display_env_verbose = FALSE;213int __kmp_omp_cancellation = FALSE;214int __kmp_nteams = 0;215int __kmp_teams_thread_limit = 0;216 217#if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT218int __kmp_user_level_mwait = FALSE;219int __kmp_umwait_enabled = FALSE;220int __kmp_mwait_enabled = FALSE;221int __kmp_mwait_hints = 0;222#endif223 224#if KMP_HAVE_UMWAIT225int __kmp_waitpkg_enabled = 0;226int __kmp_tpause_state = 0;227int __kmp_tpause_hint = 1;228int __kmp_tpause_enabled = 0;229#endif230 231/* map OMP 3.0 schedule types with our internal schedule types */232enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext +233 kmp_sched_upper_std - kmp_sched_lower - 2] = {234 kmp_sch_static_chunked, // ==> kmp_sched_static = 1235 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2236 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3237 kmp_sch_auto, // ==> kmp_sched_auto = 4238 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101239 // will likely not be used, introduced here just to debug the code240 // of public intel extension schedules241};242 243#if KMP_MIC_SUPPORTED244enum mic_type __kmp_mic_type = non_mic;245#endif246 247#if KMP_AFFINITY_SUPPORTED248 249KMPAffinity *__kmp_affinity_dispatch = NULL;250 251#if KMP_HWLOC_ENABLED252int __kmp_hwloc_error = FALSE;253hwloc_topology_t __kmp_hwloc_topology = NULL;254#endif // KMP_HWLOC_ENABLED255 256#if KMP_OS_WINDOWS257#if KMP_GROUP_AFFINITY258int __kmp_num_proc_groups = 1;259#endif /* KMP_GROUP_AFFINITY */260kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;261kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;262kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;263kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;264#endif /* KMP_OS_WINDOWS */265 266size_t __kmp_affin_mask_size = 0;267enum affinity_top_method __kmp_affinity_top_method =268 affinity_top_method_default;269 270// Regular thread affinity settings from KMP_AFFINITY271kmp_affinity_t __kmp_affinity = KMP_AFFINITY_INIT("KMP_AFFINITY");272// Hidden helper thread affinity settings from KMP_HIDDEN_HELPER_AFFINITY273kmp_affinity_t __kmp_hh_affinity =274 KMP_AFFINITY_INIT("KMP_HIDDEN_HELPER_AFFINITY");275kmp_affinity_t *__kmp_affinities[] = {&__kmp_affinity, &__kmp_hh_affinity};276 277char *__kmp_cpuinfo_file = NULL;278#if KMP_WEIGHTED_ITERATIONS_SUPPORTED279int __kmp_first_osid_with_ecore = -1;280#endif281 282#endif /* KMP_AFFINITY_SUPPORTED */283 284kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};285kmp_proc_bind_t __kmp_teams_proc_bind = proc_bind_spread;286int __kmp_affinity_num_places = 0;287int __kmp_display_affinity = FALSE;288char *__kmp_affinity_format = NULL;289 290kmp_int32 __kmp_default_device = 0;291 292kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;293kmp_int32 __kmp_max_task_priority = 0;294kmp_uint64 __kmp_taskloop_min_tasks = 0;295 296int __kmp_memkind_available = 0;297bool __kmp_hwloc_available = false;298omp_allocator_handle_t const omp_null_allocator = NULL;299omp_allocator_handle_t const omp_default_mem_alloc =300 (omp_allocator_handle_t const)1;301omp_allocator_handle_t const omp_large_cap_mem_alloc =302 (omp_allocator_handle_t const)2;303omp_allocator_handle_t const omp_const_mem_alloc =304 (omp_allocator_handle_t const)3;305omp_allocator_handle_t const omp_high_bw_mem_alloc =306 (omp_allocator_handle_t const)4;307omp_allocator_handle_t const omp_low_lat_mem_alloc =308 (omp_allocator_handle_t const)5;309omp_allocator_handle_t const omp_cgroup_mem_alloc =310 (omp_allocator_handle_t const)6;311omp_allocator_handle_t const omp_pteam_mem_alloc =312 (omp_allocator_handle_t const)7;313omp_allocator_handle_t const omp_thread_mem_alloc =314 (omp_allocator_handle_t const)8;315omp_allocator_handle_t const llvm_omp_target_host_mem_alloc =316 (omp_allocator_handle_t const)100;317omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc =318 (omp_allocator_handle_t const)101;319omp_allocator_handle_t const llvm_omp_target_device_mem_alloc =320 (omp_allocator_handle_t const)102;321omp_allocator_handle_t const kmp_max_mem_alloc =322 (omp_allocator_handle_t const)1024;323omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;324 325omp_memspace_handle_t const omp_null_mem_space = (omp_memspace_handle_t const)0;326omp_memspace_handle_t const omp_default_mem_space =327 (omp_memspace_handle_t const)99;328omp_memspace_handle_t const omp_large_cap_mem_space =329 (omp_memspace_handle_t const)1;330omp_memspace_handle_t const omp_const_mem_space =331 (omp_memspace_handle_t const)2;332omp_memspace_handle_t const omp_high_bw_mem_space =333 (omp_memspace_handle_t const)3;334omp_memspace_handle_t const omp_low_lat_mem_space =335 (omp_memspace_handle_t const)4;336omp_memspace_handle_t const llvm_omp_target_host_mem_space =337 (omp_memspace_handle_t const)100;338omp_memspace_handle_t const llvm_omp_target_shared_mem_space =339 (omp_memspace_handle_t const)101;340omp_memspace_handle_t const llvm_omp_target_device_mem_space =341 (omp_memspace_handle_t const)102;342omp_memspace_handle_t const kmp_max_mem_space =343 (omp_memspace_handle_t const)1024;344 345/* This check ensures that the compiler is passing the correct data type for the346 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is347 not a 4-byte type, then give an error message about a non-positive length348 array pointing here. If that happens, the kmp_tasking_flags_t structure must349 be redefined to have exactly 32 bits. */350KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);351 352int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */353int __kmp_enable_task_throttling = 1;354 355#ifdef DEBUG_SUSPEND356int __kmp_suspend_count = 0;357#endif358 359int __kmp_settings = FALSE;360int __kmp_duplicate_library_ok = 0;361#if USE_ITT_BUILD362int __kmp_forkjoin_frames = 1;363int __kmp_forkjoin_frames_mode = 3;364#endif365PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =366 reduction_method_not_defined;367int __kmp_determ_red = FALSE;368 369#ifdef KMP_DEBUG370int kmp_a_debug = 0;371int kmp_b_debug = 0;372int kmp_c_debug = 0;373int kmp_d_debug = 0;374int kmp_e_debug = 0;375int kmp_f_debug = 0;376int kmp_diag = 0;377#endif378 379/* For debug information logging using rotating buffer */380int __kmp_debug_buf =381 FALSE; /* TRUE means use buffer, FALSE means print to stderr */382int __kmp_debug_buf_lines =383 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */384int __kmp_debug_buf_chars =385 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */386int __kmp_debug_buf_atomic =387 FALSE; /* TRUE means use atomic update of buffer entry pointer */388 389char *__kmp_debug_buffer = NULL; /* Debug buffer itself */390std::atomic<int> __kmp_debug_count =391 0; /* number of lines printed in buffer so far */392int __kmp_debug_buf_warn_chars =393 0; /* Keep track of char increase recommended in warnings */394/* end rotating debug buffer */395 396#ifdef KMP_DEBUG397int __kmp_par_range; /* +1 => only go par for constructs in range */398/* -1 => only go par for constructs outside range */399char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};400char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};401int __kmp_par_range_lb = 0;402int __kmp_par_range_ub = INT_MAX;403#endif /* KMP_DEBUG */404 405/* For printing out dynamic storage map for threads and teams */406int __kmp_storage_map =407 FALSE; /* True means print storage map for threads and teams */408int __kmp_storage_map_verbose =409 FALSE; /* True means storage map includes placement info */410int __kmp_storage_map_verbose_specified = FALSE;411/* Initialize the library data structures when we fork a child process, defaults412 * to TRUE */413int __kmp_need_register_atfork =414 TRUE; /* At initialization, call pthread_atfork to install fork handler */415int __kmp_need_register_atfork_specified = TRUE;416 417int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */418int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */419int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */420int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */421 422// From KMP_USE_YIELD:423// 0 = never yield;424// 1 = always yield (default);425// 2 = yield only if oversubscribed426#if KMP_OS_DARWIN && KMP_ARCH_AARCH64427// Set to 0 for environments where yield is slower428kmp_int32 __kmp_use_yield = 0;429#else430kmp_int32 __kmp_use_yield = 1;431#endif432 433// This will be 1 if KMP_USE_YIELD environment variable was set explicitly434kmp_int32 __kmp_use_yield_exp_set = 0;435 436kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;437kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;438kmp_uint64 __kmp_pause_init = 1; // for tpause439 440/* ------------------------------------------------------ */441/* STATE mostly syncronized with global lock */442/* data written to rarely by primary threads, read often by workers */443/* TODO: None of this global padding stuff works consistently because the order444 of declaration is not necessarily correlated to storage order. To fix this,445 all the important globals must be put in a big structure instead. */446KMP_ALIGN_CACHE447kmp_info_t **__kmp_threads = NULL;448kmp_root_t **__kmp_root = NULL;449kmp_old_threads_list_t *__kmp_old_threads_list = NULL;450 451/* data read/written to often by primary threads */452KMP_ALIGN_CACHE453volatile int __kmp_nth = 0;454volatile int __kmp_all_nth = 0;455volatile kmp_info_t *__kmp_thread_pool = NULL;456volatile kmp_team_t *__kmp_team_pool = NULL;457 458KMP_ALIGN_CACHE459std::atomic<int> __kmp_thread_pool_active_nth = 0;460 461/* -------------------------------------------------462 * GLOBAL/ROOT STATE */463KMP_ALIGN_CACHE464kmp_global_t __kmp_global;465 466/* ----------------------------------------------- */467/* GLOBAL SYNCHRONIZATION LOCKS */468/* TODO verify the need for these locks and if they need to be global */469 470#if KMP_USE_INTERNODE_ALIGNMENT471/* Multinode systems have larger cache line granularity which can cause472 * false sharing if the alignment is not large enough for these locks */473KMP_ALIGN_CACHE_INTERNODE474 475KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */476KMP_ALIGN_CACHE_INTERNODE477KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */478KMP_ALIGN_CACHE_INTERNODE479KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */480#if KMP_USE_MONITOR481/* control monitor thread creation */482KMP_ALIGN_CACHE_INTERNODE483KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);484#endif485/* used for the hack to allow threadprivate cache and __kmp_threads expansion486 to co-exist */487KMP_ALIGN_CACHE_INTERNODE488KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);489 490KMP_ALIGN_CACHE_INTERNODE491KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */492#else493KMP_ALIGN_CACHE494 495KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */496KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */497KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */498#if KMP_USE_MONITOR499/* control monitor thread creation */500KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);501#endif502/* used for the hack to allow threadprivate cache and __kmp_threads expansion503 to co-exist */504KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);505 506KMP_ALIGN(128)507KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */508#endif509 510/* ----------------------------------------------- */511 512#if KMP_HANDLE_SIGNALS513/* Signal handling is disabled by default, because it confuses users: In case of514 sigsegv (or other trouble) in user code signal handler catches the signal,515 which then "appears" in the monitor thread (when the monitor executes raise()516 function). Users see signal in the monitor thread and blame OpenMP RTL.517 518 Grant said signal handling required on some older OSes (Irix?) supported by519 KAI, because bad applications hung but not aborted. Currently it is not a520 problem for Linux* OS, OS X* and Windows* OS.521 522 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm523 putting the default back for now to see if that fixes hangs on those524 machines.525 526 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of527 stack backtrace when program is aborting, but the code is not signal-safe.528 When multiple signals raised at the same time (which occurs in dynamic529 negative tests because all the worker threads detects the same error),530 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided531 by Steve R., and will be available soon. */532int __kmp_handle_signals = FALSE;533#endif534 535#ifdef DEBUG_SUSPEND536int get_suspend_count_(void) {537 int count = __kmp_suspend_count;538 __kmp_suspend_count = 0;539 return count;540}541void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }542#endif543 544kmp_target_offload_kind_t __kmp_target_offload = tgt_default;545 546// OMP Pause Resources547kmp_pause_status_t __kmp_pause_status = kmp_not_paused;548 549// Nesting mode550int __kmp_nesting_mode = 0;551int __kmp_nesting_mode_nlevels = 1;552int *__kmp_nesting_nth_level;553 554#if OMPX_TASKGRAPH555// TDG record & replay556int __kmp_tdg_dot = 0;557kmp_int32 __kmp_max_tdgs = 100;558kmp_tdg_info_t **__kmp_global_tdgs = NULL;559kmp_int32 __kmp_curr_tdg_idx =560 0; // Id of the current TDG being recorded or executed561kmp_int32 __kmp_num_tdg = 0;562kmp_int32 __kmp_successors_size = 10; // Initial succesor size list for563 // recording564std::atomic<kmp_int32> __kmp_tdg_task_id = 0;565#endif566// end of file //567 568