openmp/runtime/src/kmp_global.cpp

   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_need_register_serial = TRUE;
  48 volatile int __kmp_init_middle = FALSE;
  49 volatile int __kmp_init_parallel = FALSE;
  50 volatile int __kmp_init_hidden_helper = FALSE;
  51 volatile int __kmp_init_hidden_helper_threads = FALSE;
  52 volatile int __kmp_hidden_helper_team_done = FALSE;
  53 #if KMP_USE_MONITOR
  54 volatile int __kmp_init_monitor =
  55     0; /* 1 - launched, 2 - actually started (Windows* OS only) */
  56 #endif
  57 volatile int __kmp_init_user_locks = FALSE;
  58
  59 /* list of address of allocated caches for commons */
  60 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;
  61
  62 int __kmp_init_counter = 0;
  63 int __kmp_root_counter = 0;
  64 int __kmp_version = 0;
  65
  66 std::atomic<kmp_int32> __kmp_team_counter = 0;
  67 std::atomic<kmp_int32> __kmp_task_counter = 0;
  68
  69 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
  70 #if KMP_USE_MONITOR
  71 size_t __kmp_monitor_stksize = 0; // auto adjust
  72 #endif
  73 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;
  74 int __kmp_stkpadding = KMP_MIN_STKPADDING;
  75
  76 size_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)
  80 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2;
  81 /* branch_factor = 4 */ /* hyper2: C78980 */
  82 kmp_uint32 __kmp_barrier_release_bb_dflt = 2;
  83 /* branch_factor = 4 */ /* hyper2: C78980 */
  84
  85 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar;
  86 /* hyper2: C78980 */
  87 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar;
  88 /* hyper2: C78980 */
  89
  90 kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0};
  91 kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0};
  92 kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar};
  93 kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar};
  94 char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = {
  95     "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"
  96 #if KMP_FAST_REDUCTION_BARRIER
  97     ,
  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     ,
 105     "KMP_REDUCTION_BARRIER_PATTERN"
 106 #endif // KMP_FAST_REDUCTION_BARRIER
 107 };
 108 char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin"
 109 #if KMP_FAST_REDUCTION_BARRIER
 110                                                         ,
 111                                                         "reduction"
 112 #endif // KMP_FAST_REDUCTION_BARRIER
 113 };
 114 char const *__kmp_barrier_pattern_name[bp_last_bar] = {
 115     "linear", "tree", "hyper", "hierarchical", "dist"};
 116
 117 int __kmp_allThreadsSpecified = 0;
 118 size_t __kmp_align_alloc = CACHE_LINE;
 119
 120 int __kmp_generate_warnings = kmp_warnings_low;
 121 int __kmp_reserve_warn = 0;
 122 int __kmp_xproc = 0;
 123 int __kmp_avail_proc = 0;
 124 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;
 125 int __kmp_sys_max_nth = KMP_MAX_NTH;
 126 int __kmp_max_nth = 0;
 127 int __kmp_cg_max_nth = 0;
 128 int __kmp_task_max_nth = 0;
 129 int __kmp_teams_max_nth = 0;
 130 int __kmp_threads_capacity = 0;
 131 int __kmp_dflt_team_nth = 0;
 132 int __kmp_dflt_team_nth_ub = 0;
 133 int __kmp_tp_capacity = 0;
 134 int __kmp_tp_cached = 0;
 135 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;
 136 int __kmp_dflt_max_active_levels = 1; // Nesting off by default
 137 bool __kmp_dflt_max_active_levels_set = false; // Don't override set value
 138 #if KMP_NESTED_HOT_TEAMS
 139 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */
 140 /* 1 - keep extra threads when reduced */
 141 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */
 142 #endif
 143 enum library_type __kmp_library = library_none;
 144 enum sched_type __kmp_sched =
 145     kmp_sch_default; /* scheduling method for runtime scheduling */
 146 enum sched_type __kmp_static =
 147     kmp_sch_static_greedy; /* default static scheduling method */
 148 enum sched_type __kmp_guided =
 149     kmp_sch_guided_iterative_chunked; /* default guided scheduling method */
 150 enum sched_type __kmp_auto =
 151     kmp_sch_guided_analytical_chunked; /* default auto scheduling method */
 152 #if KMP_USE_HIER_SCHED
 153 int __kmp_dispatch_hand_threading = 0;
 154 int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1];
 155 int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1];
 156 kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL};
 157 #endif
 158 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME; // in microseconds
 159 char __kmp_blocktime_units = 'm'; // Units specified in KMP_BLOCKTIME
 160 bool __kmp_wpolicy_passive = false;
 161 #if KMP_USE_MONITOR
 162 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;
 163 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME,
 164                                                       KMP_MIN_MONITOR_WAKEUPS);
 165 #endif
 166 #ifdef KMP_ADJUST_BLOCKTIME
 167 int __kmp_zero_bt = FALSE;
 168 #endif /* KMP_ADJUST_BLOCKTIME */
 169 #ifdef KMP_DFLT_NTH_CORES
 170 int __kmp_ncores = 0;
 171 #endif
 172 int __kmp_chunk = 0;
 173 int __kmp_force_monotonic = 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 KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE;
 187 #endif /* KMP_TDATA_GTID */
 188 int __kmp_tls_gtid_min = INT_MAX;
 189 int __kmp_foreign_tp = TRUE;
 190 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
 191 int __kmp_inherit_fp_control = TRUE;
 192 kmp_int16 __kmp_init_x87_fpu_control_word = 0;
 193 kmp_uint32 __kmp_init_mxcsr = 0;
 194 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
 195
 196 #ifdef USE_LOAD_BALANCE
 197 double __kmp_load_balance_interval = 1.0;
 198 #endif /* USE_LOAD_BALANCE */
 199
 200 kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0};
 201
 202 #if KMP_USE_ADAPTIVE_LOCKS
 203
 204 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = {
 205     1, 1024}; // TODO: tune it!
 206
 207 #if KMP_DEBUG_ADAPTIVE_LOCKS
 208 const char *__kmp_speculative_statsfile = "-";
 209 #endif
 210
 211 #endif // KMP_USE_ADAPTIVE_LOCKS
 212
 213 int __kmp_display_env = FALSE;
 214 int __kmp_display_env_verbose = FALSE;
 215 int __kmp_omp_cancellation = FALSE;
 216 int __kmp_nteams = 0;
 217 int __kmp_teams_thread_limit = 0;
 218
 219 #if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT
 220 int __kmp_user_level_mwait = FALSE;
 221 int __kmp_umwait_enabled = FALSE;
 222 int __kmp_mwait_enabled = FALSE;
 223 int __kmp_mwait_hints = 0;
 224 #endif
 225
 226 #if KMP_HAVE_UMWAIT
 227 int __kmp_waitpkg_enabled = 0;
 228 int __kmp_tpause_state = 0;
 229 int __kmp_tpause_hint = 1;
 230 int __kmp_tpause_enabled = 0;
 231 #endif
 232
 233 /* map OMP 3.0 schedule types with our internal schedule types */
 234 enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext +
 235                               kmp_sched_upper_std - kmp_sched_lower - 2] = {
 236     kmp_sch_static_chunked, // ==> kmp_sched_static            = 1
 237     kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic           = 2
 238     kmp_sch_guided_chunked, // ==> kmp_sched_guided            = 3
 239     kmp_sch_auto, // ==> kmp_sched_auto              = 4
 240     kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal       = 101
 241     // will likely not be used, introduced here just to debug the code
 242     // of public intel extension schedules
 243 };
 244
 245 #if KMP_OS_LINUX
 246 enum clock_function_type __kmp_clock_function;
 247 int __kmp_clock_function_param;
 248 #endif /* KMP_OS_LINUX */
 249
 250 #if KMP_MIC_SUPPORTED
 251 enum mic_type __kmp_mic_type = non_mic;
 252 #endif
 253
 254 #if KMP_AFFINITY_SUPPORTED
 255
 256 KMPAffinity *__kmp_affinity_dispatch = NULL;
 257
 258 #if KMP_USE_HWLOC
 259 int __kmp_hwloc_error = FALSE;
 260 hwloc_topology_t __kmp_hwloc_topology = NULL;
 261 #endif
 262
 263 #if KMP_OS_WINDOWS
 264 #if KMP_GROUP_AFFINITY
 265 int __kmp_num_proc_groups = 1;
 266 #endif /* KMP_GROUP_AFFINITY */
 267 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
 268 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
 269 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
 270 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
 271 #endif /* KMP_OS_WINDOWS */
 272
 273 size_t __kmp_affin_mask_size = 0;
 274 enum affinity_top_method __kmp_affinity_top_method =
 275     affinity_top_method_default;
 276
 277 // Regular thread affinity settings from KMP_AFFINITY
 278 kmp_affinity_t __kmp_affinity = KMP_AFFINITY_INIT("KMP_AFFINITY");
 279 // Hidden helper thread affinity settings from KMP_HIDDEN_HELPER_AFFINITY
 280 kmp_affinity_t __kmp_hh_affinity =
 281     KMP_AFFINITY_INIT("KMP_HIDDEN_HELPER_AFFINITY");
 282 kmp_affinity_t *__kmp_affinities[] = {&__kmp_affinity, &__kmp_hh_affinity};
 283
 284 char *__kmp_cpuinfo_file = NULL;
 285
 286 #endif /* KMP_AFFINITY_SUPPORTED */
 287
 288 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
 289 kmp_proc_bind_t __kmp_teams_proc_bind = proc_bind_spread;
 290 int __kmp_affinity_num_places = 0;
 291 int __kmp_display_affinity = FALSE;
 292 char *__kmp_affinity_format = NULL;
 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 llvm_omp_target_host_mem_alloc =
 319     (omp_allocator_handle_t const)100;
 320 omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc =
 321     (omp_allocator_handle_t const)101;
 322 omp_allocator_handle_t const llvm_omp_target_device_mem_alloc =
 323     (omp_allocator_handle_t const)102;
 324 omp_allocator_handle_t const kmp_max_mem_alloc =
 325     (omp_allocator_handle_t const)1024;
 326 omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;
 327
 328 omp_memspace_handle_t const omp_default_mem_space =
 329     (omp_memspace_handle_t const)0;
 330 omp_memspace_handle_t const omp_large_cap_mem_space =
 331     (omp_memspace_handle_t const)1;
 332 omp_memspace_handle_t const omp_const_mem_space =
 333     (omp_memspace_handle_t const)2;
 334 omp_memspace_handle_t const omp_high_bw_mem_space =
 335     (omp_memspace_handle_t const)3;
 336 omp_memspace_handle_t const omp_low_lat_mem_space =
 337     (omp_memspace_handle_t const)4;
 338 omp_memspace_handle_t const llvm_omp_target_host_mem_space =
 339     (omp_memspace_handle_t const)100;
 340 omp_memspace_handle_t const llvm_omp_target_shared_mem_space =
 341     (omp_memspace_handle_t const)101;
 342 omp_memspace_handle_t const llvm_omp_target_device_mem_space =
 343     (omp_memspace_handle_t const)102;
 344
 345 /* This check ensures that the compiler is passing the correct data type for the
 346    flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
 347    not a 4-byte type, then give an error message about a non-positive length
 348    array pointing here.  If that happens, the kmp_tasking_flags_t structure must
 349    be redefined to have exactly 32 bits. */
 350 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
 351
 352 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
 353 int __kmp_enable_task_throttling = 1;
 354
 355 #ifdef DEBUG_SUSPEND
 356 int __kmp_suspend_count = 0;
 357 #endif
 358
 359 int __kmp_settings = FALSE;
 360 int __kmp_duplicate_library_ok = 0;
 361 #if USE_ITT_BUILD
 362 int __kmp_forkjoin_frames = 1;
 363 int __kmp_forkjoin_frames_mode = 3;
 364 #endif
 365 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
 366     reduction_method_not_defined;
 367 int __kmp_determ_red = FALSE;
 368
 369 #ifdef KMP_DEBUG
 370 int kmp_a_debug = 0;
 371 int kmp_b_debug = 0;
 372 int kmp_c_debug = 0;
 373 int kmp_d_debug = 0;
 374 int kmp_e_debug = 0;
 375 int kmp_f_debug = 0;
 376 int kmp_diag = 0;
 377 #endif
 378
 379 /* For debug information logging using rotating buffer */
 380 int __kmp_debug_buf =
 381     FALSE; /* TRUE means use buffer, FALSE means print to stderr */
 382 int __kmp_debug_buf_lines =
 383     KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
 384 int __kmp_debug_buf_chars =
 385     KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
 386 int __kmp_debug_buf_atomic =
 387     FALSE; /* TRUE means use atomic update of buffer entry pointer */
 388
 389 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
 390 std::atomic<int> __kmp_debug_count =
 391     0; /* number of lines printed in buffer so far */
 392 int __kmp_debug_buf_warn_chars =
 393     0; /* Keep track of char increase recommended in warnings */
 394 /* end rotating debug buffer */
 395
 396 #ifdef KMP_DEBUG
 397 int __kmp_par_range; /* +1 => only go par for constructs in range */
 398 /* -1 => only go par for constructs outside range */
 399 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
 400 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
 401 int __kmp_par_range_lb = 0;
 402 int __kmp_par_range_ub = INT_MAX;
 403 #endif /* KMP_DEBUG */
 404
 405 /* For printing out dynamic storage map for threads and teams */
 406 int __kmp_storage_map =
 407     FALSE; /* True means print storage map for threads and teams */
 408 int __kmp_storage_map_verbose =
 409     FALSE; /* True means storage map includes placement info */
 410 int __kmp_storage_map_verbose_specified = FALSE;
 411 /* Initialize the library data structures when we fork a child process, defaults
 412  * to TRUE */
 413 int __kmp_need_register_atfork =
 414     TRUE; /* At initialization, call pthread_atfork to install fork handler */
 415 int __kmp_need_register_atfork_specified = TRUE;
 416
 417 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
 418 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
 419 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified?    */
 420 int __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 oversubscribed
 426 #if KMP_OS_DARWIN && KMP_ARCH_AARCH64
 427 // Set to 0 for environments where yield is slower
 428 kmp_int32 __kmp_use_yield = 0;
 429 #else
 430 kmp_int32 __kmp_use_yield = 1;
 431 #endif
 432
 433 // This will be 1 if KMP_USE_YIELD environment variable was set explicitly
 434 kmp_int32 __kmp_use_yield_exp_set = 0;
 435
 436 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
 437 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
 438 kmp_uint64 __kmp_pause_init = 1; // for tpause
 439
 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 order
 444    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. */
 446 KMP_ALIGN_CACHE
 447 kmp_info_t **__kmp_threads = NULL;
 448 kmp_root_t **__kmp_root = NULL;
 449 kmp_old_threads_list_t *__kmp_old_threads_list = NULL;
 450
 451 /* data read/written to often by primary threads */
 452 KMP_ALIGN_CACHE
 453 volatile int __kmp_nth = 0;
 454 volatile int __kmp_all_nth = 0;
 455 volatile kmp_info_t *__kmp_thread_pool = NULL;
 456 volatile kmp_team_t *__kmp_team_pool = NULL;
 457
 458 KMP_ALIGN_CACHE
 459 std::atomic<int> __kmp_thread_pool_active_nth = 0;
 460
 461 /* -------------------------------------------------
 462  * GLOBAL/ROOT STATE */
 463 KMP_ALIGN_CACHE
 464 kmp_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_ALIGNMENT
 471 /* Multinode systems have larger cache line granularity which can cause
 472  * false sharing if the alignment is not large enough for these locks */
 473 KMP_ALIGN_CACHE_INTERNODE
 474
 475 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
 476 KMP_ALIGN_CACHE_INTERNODE
 477 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
 478 KMP_ALIGN_CACHE_INTERNODE
 479 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
 480 #if KMP_USE_MONITOR
 481 /* control monitor thread creation */
 482 KMP_ALIGN_CACHE_INTERNODE
 483 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
 484 #endif
 485 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
 486    to co-exist */
 487 KMP_ALIGN_CACHE_INTERNODE
 488 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
 489
 490 KMP_ALIGN_CACHE_INTERNODE
 491 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
 492 KMP_ALIGN_CACHE_INTERNODE
 493 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access  */
 494 KMP_ALIGN_CACHE_INTERNODE
 495 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
 496 #else
 497 KMP_ALIGN_CACHE
 498
 499 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
 500 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
 501 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
 502 #if KMP_USE_MONITOR
 503 /* control monitor thread creation */
 504 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
 505 #endif
 506 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
 507    to co-exist */
 508 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
 509
 510 KMP_ALIGN(128)
 511 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
 512 KMP_ALIGN(128)
 513 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access  */
 514 KMP_ALIGN(128)
 515 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
 516 #endif
 517
 518 /* ----------------------------------------------- */
 519
 520 #if KMP_HANDLE_SIGNALS
 521 /* Signal handling is disabled by default, because it confuses users: In case of
 522    sigsegv (or other trouble) in user code signal handler catches the signal,
 523    which then "appears" in the monitor thread (when the monitor executes raise()
 524    function). Users see signal in the monitor thread and blame OpenMP RTL.
 525
 526    Grant said signal handling required on some older OSes (Irix?) supported by
 527    KAI, because bad applications hung but not aborted. Currently it is not a
 528    problem for Linux* OS, OS X* and Windows* OS.
 529
 530    Grant: Found new hangs for EL4, EL5, and a Fedora Core machine.  So I'm
 531    putting the default back for now to see if that fixes hangs on those
 532    machines.
 533
 534    2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
 535    stack backtrace when program is aborting, but the code is not signal-safe.
 536    When multiple signals raised at the same time (which occurs in dynamic
 537    negative tests because all the worker threads detects the same error),
 538    Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
 539    by Steve R., and will be available soon. */
 540 int __kmp_handle_signals = FALSE;
 541 #endif
 542
 543 #ifdef DEBUG_SUSPEND
 544 int get_suspend_count_(void) {
 545   int count = __kmp_suspend_count;
 546   __kmp_suspend_count = 0;
 547   return count;
 548 }
 549 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
 550 #endif
 551
 552 kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
 553
 554 // OMP Pause Resources
 555 kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
 556
 557 // Nesting mode
 558 int __kmp_nesting_mode = 0;
 559 int __kmp_nesting_mode_nlevels = 1;
 560 int *__kmp_nesting_nth_level;
 561
 562 #if OMPX_TASKGRAPH
 563 // TDG record & replay
 564 int __kmp_tdg_dot = 0;
 565 kmp_int32 __kmp_max_tdgs = 100;
 566 kmp_tdg_info_t **__kmp_global_tdgs = NULL;
 567 kmp_int32 __kmp_curr_tdg_idx =
 568     0; // Id of the current TDG being recorded or executed
 569 kmp_int32 __kmp_num_tdg = 0;
 570 kmp_int32 __kmp_successors_size = 10; // Initial succesor size list for
 571                                       // recording
 572 std::atomic<kmp_int32> __kmp_tdg_task_id = 0;
 573 #endif
 574 // end of file //
 575