LLVM OpenMP* Runtime Library
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 || KMP_OS_AIX) && 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_MIC_SUPPORTED
246 enum mic_type __kmp_mic_type = non_mic;
247 #endif
248 
249 #if KMP_AFFINITY_SUPPORTED
250 
251 KMPAffinity *__kmp_affinity_dispatch = NULL;
252 
253 #if KMP_USE_HWLOC
254 int __kmp_hwloc_error = FALSE;
255 hwloc_topology_t __kmp_hwloc_topology = NULL;
256 #endif
257 
258 #if KMP_OS_WINDOWS
259 #if KMP_GROUP_AFFINITY
260 int __kmp_num_proc_groups = 1;
261 #endif /* KMP_GROUP_AFFINITY */
262 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
263 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
264 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
265 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
266 #endif /* KMP_OS_WINDOWS */
267 
268 size_t __kmp_affin_mask_size = 0;
269 enum affinity_top_method __kmp_affinity_top_method =
270  affinity_top_method_default;
271 
272 // Regular thread affinity settings from KMP_AFFINITY
273 kmp_affinity_t __kmp_affinity = KMP_AFFINITY_INIT("KMP_AFFINITY");
274 // Hidden helper thread affinity settings from KMP_HIDDEN_HELPER_AFFINITY
275 kmp_affinity_t __kmp_hh_affinity =
276  KMP_AFFINITY_INIT("KMP_HIDDEN_HELPER_AFFINITY");
277 kmp_affinity_t *__kmp_affinities[] = {&__kmp_affinity, &__kmp_hh_affinity};
278 
279 char *__kmp_cpuinfo_file = NULL;
280 #if KMP_WEIGHTED_ITERATIONS_SUPPORTED
281 int __kmp_first_osid_with_ecore = -1;
282 #endif
283 
284 #endif /* KMP_AFFINITY_SUPPORTED */
285 
286 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
287 kmp_proc_bind_t __kmp_teams_proc_bind = proc_bind_spread;
288 int __kmp_affinity_num_places = 0;
289 int __kmp_display_affinity = FALSE;
290 char *__kmp_affinity_format = NULL;
291 
292 kmp_int32 __kmp_default_device = 0;
293 
294 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
295 kmp_int32 __kmp_max_task_priority = 0;
296 kmp_uint64 __kmp_taskloop_min_tasks = 0;
297 
298 int __kmp_memkind_available = 0;
299 bool __kmp_hwloc_available = false;
300 omp_allocator_handle_t const omp_null_allocator = NULL;
301 omp_allocator_handle_t const omp_default_mem_alloc =
302  (omp_allocator_handle_t const)1;
303 omp_allocator_handle_t const omp_large_cap_mem_alloc =
304  (omp_allocator_handle_t const)2;
305 omp_allocator_handle_t const omp_const_mem_alloc =
306  (omp_allocator_handle_t const)3;
307 omp_allocator_handle_t const omp_high_bw_mem_alloc =
308  (omp_allocator_handle_t const)4;
309 omp_allocator_handle_t const omp_low_lat_mem_alloc =
310  (omp_allocator_handle_t const)5;
311 omp_allocator_handle_t const omp_cgroup_mem_alloc =
312  (omp_allocator_handle_t const)6;
313 omp_allocator_handle_t const omp_pteam_mem_alloc =
314  (omp_allocator_handle_t const)7;
315 omp_allocator_handle_t const omp_thread_mem_alloc =
316  (omp_allocator_handle_t const)8;
317 omp_allocator_handle_t const llvm_omp_target_host_mem_alloc =
318  (omp_allocator_handle_t const)100;
319 omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc =
320  (omp_allocator_handle_t const)101;
321 omp_allocator_handle_t const llvm_omp_target_device_mem_alloc =
322  (omp_allocator_handle_t const)102;
323 omp_allocator_handle_t const kmp_max_mem_alloc =
324  (omp_allocator_handle_t const)1024;
325 omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;
326 
327 omp_memspace_handle_t const omp_null_mem_space = (omp_memspace_handle_t const)0;
328 omp_memspace_handle_t const omp_default_mem_space =
329  (omp_memspace_handle_t const)99;
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 omp_memspace_handle_t const kmp_max_mem_space =
345  (omp_memspace_handle_t const)1024;
346 
347 /* This check ensures that the compiler is passing the correct data type for the
348  flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
349  not a 4-byte type, then give an error message about a non-positive length
350  array pointing here. If that happens, the kmp_tasking_flags_t structure must
351  be redefined to have exactly 32 bits. */
352 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
353 
354 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
355 int __kmp_enable_task_throttling = 1;
356 
357 #ifdef DEBUG_SUSPEND
358 int __kmp_suspend_count = 0;
359 #endif
360 
361 int __kmp_settings = FALSE;
362 int __kmp_duplicate_library_ok = 0;
363 #if USE_ITT_BUILD
364 int __kmp_forkjoin_frames = 1;
365 int __kmp_forkjoin_frames_mode = 3;
366 #endif
367 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
368  reduction_method_not_defined;
369 int __kmp_determ_red = FALSE;
370 
371 #ifdef KMP_DEBUG
372 int kmp_a_debug = 0;
373 int kmp_b_debug = 0;
374 int kmp_c_debug = 0;
375 int kmp_d_debug = 0;
376 int kmp_e_debug = 0;
377 int kmp_f_debug = 0;
378 int kmp_diag = 0;
379 #endif
380 
381 /* For debug information logging using rotating buffer */
382 int __kmp_debug_buf =
383  FALSE; /* TRUE means use buffer, FALSE means print to stderr */
384 int __kmp_debug_buf_lines =
385  KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
386 int __kmp_debug_buf_chars =
387  KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
388 int __kmp_debug_buf_atomic =
389  FALSE; /* TRUE means use atomic update of buffer entry pointer */
390 
391 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
392 std::atomic<int> __kmp_debug_count =
393  0; /* number of lines printed in buffer so far */
394 int __kmp_debug_buf_warn_chars =
395  0; /* Keep track of char increase recommended in warnings */
396 /* end rotating debug buffer */
397 
398 #ifdef KMP_DEBUG
399 int __kmp_par_range; /* +1 => only go par for constructs in range */
400 /* -1 => only go par for constructs outside range */
401 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
402 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
403 int __kmp_par_range_lb = 0;
404 int __kmp_par_range_ub = INT_MAX;
405 #endif /* KMP_DEBUG */
406 
407 /* For printing out dynamic storage map for threads and teams */
408 int __kmp_storage_map =
409  FALSE; /* True means print storage map for threads and teams */
410 int __kmp_storage_map_verbose =
411  FALSE; /* True means storage map includes placement info */
412 int __kmp_storage_map_verbose_specified = FALSE;
413 /* Initialize the library data structures when we fork a child process, defaults
414  * to TRUE */
415 int __kmp_need_register_atfork =
416  TRUE; /* At initialization, call pthread_atfork to install fork handler */
417 int __kmp_need_register_atfork_specified = TRUE;
418 
419 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
420 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
421 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
422 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
423 
424 // From KMP_USE_YIELD:
425 // 0 = never yield;
426 // 1 = always yield (default);
427 // 2 = yield only if oversubscribed
428 #if KMP_OS_DARWIN && KMP_ARCH_AARCH64
429 // Set to 0 for environments where yield is slower
430 kmp_int32 __kmp_use_yield = 0;
431 #else
432 kmp_int32 __kmp_use_yield = 1;
433 #endif
434 
435 // This will be 1 if KMP_USE_YIELD environment variable was set explicitly
436 kmp_int32 __kmp_use_yield_exp_set = 0;
437 
438 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
439 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
440 kmp_uint64 __kmp_pause_init = 1; // for tpause
441 
442 /* ------------------------------------------------------ */
443 /* STATE mostly syncronized with global lock */
444 /* data written to rarely by primary threads, read often by workers */
445 /* TODO: None of this global padding stuff works consistently because the order
446  of declaration is not necessarily correlated to storage order. To fix this,
447  all the important globals must be put in a big structure instead. */
448 KMP_ALIGN_CACHE
449 kmp_info_t **__kmp_threads = NULL;
450 kmp_root_t **__kmp_root = NULL;
451 kmp_old_threads_list_t *__kmp_old_threads_list = NULL;
452 
453 /* data read/written to often by primary threads */
454 KMP_ALIGN_CACHE
455 volatile int __kmp_nth = 0;
456 volatile int __kmp_all_nth = 0;
457 volatile kmp_info_t *__kmp_thread_pool = NULL;
458 volatile kmp_team_t *__kmp_team_pool = NULL;
459 
460 KMP_ALIGN_CACHE
461 std::atomic<int> __kmp_thread_pool_active_nth = 0;
462 
463 /* -------------------------------------------------
464  * GLOBAL/ROOT STATE */
465 KMP_ALIGN_CACHE
466 kmp_global_t __kmp_global;
467 
468 /* ----------------------------------------------- */
469 /* GLOBAL SYNCHRONIZATION LOCKS */
470 /* TODO verify the need for these locks and if they need to be global */
471 
472 #if KMP_USE_INTERNODE_ALIGNMENT
473 /* Multinode systems have larger cache line granularity which can cause
474  * false sharing if the alignment is not large enough for these locks */
475 KMP_ALIGN_CACHE_INTERNODE
476 
477 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
478 KMP_ALIGN_CACHE_INTERNODE
479 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
480 KMP_ALIGN_CACHE_INTERNODE
481 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
482 #if KMP_USE_MONITOR
483 /* control monitor thread creation */
484 KMP_ALIGN_CACHE_INTERNODE
485 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
486 #endif
487 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
488  to co-exist */
489 KMP_ALIGN_CACHE_INTERNODE
490 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
491 
492 KMP_ALIGN_CACHE_INTERNODE
493 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
494 #else
495 KMP_ALIGN_CACHE
496 
497 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
498 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
499 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
500 #if KMP_USE_MONITOR
501 /* control monitor thread creation */
502 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
503 #endif
504 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
505  to co-exist */
506 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
507 
508 KMP_ALIGN(128)
509 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
510 #endif
511 
512 /* ----------------------------------------------- */
513 
514 #if KMP_HANDLE_SIGNALS
515 /* Signal handling is disabled by default, because it confuses users: In case of
516  sigsegv (or other trouble) in user code signal handler catches the signal,
517  which then "appears" in the monitor thread (when the monitor executes raise()
518  function). Users see signal in the monitor thread and blame OpenMP RTL.
519 
520  Grant said signal handling required on some older OSes (Irix?) supported by
521  KAI, because bad applications hung but not aborted. Currently it is not a
522  problem for Linux* OS, OS X* and Windows* OS.
523 
524  Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm
525  putting the default back for now to see if that fixes hangs on those
526  machines.
527 
528  2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
529  stack backtrace when program is aborting, but the code is not signal-safe.
530  When multiple signals raised at the same time (which occurs in dynamic
531  negative tests because all the worker threads detects the same error),
532  Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
533  by Steve R., and will be available soon. */
534 int __kmp_handle_signals = FALSE;
535 #endif
536 
537 #ifdef DEBUG_SUSPEND
538 int get_suspend_count_(void) {
539  int count = __kmp_suspend_count;
540  __kmp_suspend_count = 0;
541  return count;
542 }
543 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
544 #endif
545 
546 kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
547 
548 // OMP Pause Resources
549 kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
550 
551 // Nesting mode
552 int __kmp_nesting_mode = 0;
553 int __kmp_nesting_mode_nlevels = 1;
554 int *__kmp_nesting_nth_level;
555 
556 #if OMPX_TASKGRAPH
557 // TDG record & replay
558 int __kmp_tdg_dot = 0;
559 kmp_int32 __kmp_max_tdgs = 100;
560 kmp_tdg_info_t **__kmp_global_tdgs = NULL;
561 kmp_int32 __kmp_curr_tdg_idx =
562  0; // Id of the current TDG being recorded or executed
563 kmp_int32 __kmp_num_tdg = 0;
564 kmp_int32 __kmp_successors_size = 10; // Initial succesor size list for
565  // recording
566 std::atomic<kmp_int32> __kmp_tdg_task_id = 0;
567 #endif
568 // end of file //
569 
sched_type
Definition: kmp.h:370
@ kmp_sch_auto
Definition: kmp.h:377
@ kmp_sch_default
Definition: kmp.h:478
@ kmp_sch_guided_chunked
Definition: kmp.h:375