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
19kmp_key_t __kmp_gtid_threadprivate_key;
20
21#if KMP_ARCH_X86 || KMP_ARCH_X86_64
22kmp_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
28kmp_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.
32kmp_stats_list *__kmp_stats_list;
33
34// thread local pointer to stats node within list
35KMP_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#endif
40
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_init_middle = FALSE;
48volatile int __kmp_init_parallel = FALSE;
49volatile int __kmp_init_hidden_helper = FALSE;
50volatile int __kmp_init_hidden_helper_threads = FALSE;
51volatile int __kmp_hidden_helper_team_done = FALSE;
52#if KMP_USE_MONITOR
53volatile int __kmp_init_monitor =
54 0; /* 1 - launched, 2 - actually started (Windows* OS only) */
55#endif
56volatile int __kmp_init_user_locks = FALSE;
57
58/* list of address of allocated caches for commons */
59kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;
60
61int __kmp_init_counter = 0;
62int __kmp_root_counter = 0;
63int __kmp_version = 0;
64
65std::atomic<kmp_int32> __kmp_team_counter = ATOMIC_VAR_INIT(0);
66std::atomic<kmp_int32> __kmp_task_counter = ATOMIC_VAR_INIT(0);
67
68size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
69#if KMP_USE_MONITOR
70size_t __kmp_monitor_stksize = 0; // auto adjust
71#endif
72size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;
73int __kmp_stkpadding = KMP_MIN_STKPADDING;
74
75size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR;
76
77// Barrier method defaults, settings, and strings.
78// branch factor = 2^branch_bits (only relevant for tree & hyper barrier types)
79kmp_uint32 __kmp_barrier_gather_bb_dflt = 2;
80/* branch_factor = 4 */ /* hyper2: C78980 */
81kmp_uint32 __kmp_barrier_release_bb_dflt = 2;
82/* branch_factor = 4 */ /* hyper2: C78980 */
83
84kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar;
85/* hyper2: C78980 */
86kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar;
87/* hyper2: C78980 */
88
89kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0};
90kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0};
91kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar};
92kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar};
93char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = {
94 "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"
95#if KMP_FAST_REDUCTION_BARRIER
96 ,
97 "KMP_REDUCTION_BARRIER"
98#endif // KMP_FAST_REDUCTION_BARRIER
99};
100char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = {
101 "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN"
102#if KMP_FAST_REDUCTION_BARRIER
103 ,
104 "KMP_REDUCTION_BARRIER_PATTERN"
105#endif // KMP_FAST_REDUCTION_BARRIER
106};
107char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin"
108#if KMP_FAST_REDUCTION_BARRIER
109 ,
110 "reduction"
111#endif // KMP_FAST_REDUCTION_BARRIER
112};
113char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear", "tree",
114 "hyper", "hierarchical"};
115
116int __kmp_allThreadsSpecified = 0;
117size_t __kmp_align_alloc = CACHE_LINE;
118
119int __kmp_generate_warnings = kmp_warnings_low;
120int __kmp_reserve_warn = 0;
121int __kmp_xproc = 0;
122int __kmp_avail_proc = 0;
123size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;
124int __kmp_sys_max_nth = KMP_MAX_NTH;
125int __kmp_max_nth = 0;
126int __kmp_cg_max_nth = 0;
127int __kmp_teams_max_nth = 0;
128int __kmp_threads_capacity = 0;
129int __kmp_dflt_team_nth = 0;
130int __kmp_dflt_team_nth_ub = 0;
131int __kmp_tp_capacity = 0;
132int __kmp_tp_cached = 0;
133int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;
134int __kmp_dflt_max_active_levels = 1; // Nesting off by default
135bool __kmp_dflt_max_active_levels_set = false; // Don't override set value
136#if KMP_NESTED_HOT_TEAMS
137int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */
138/* 1 - keep extra threads when reduced */
139int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */
140#endif
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_SCHED
151int __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#endif
156int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME;
157#if KMP_USE_MONITOR
158int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;
159int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME,
160 KMP_MIN_MONITOR_WAKEUPS);
161#endif
162#ifdef KMP_ADJUST_BLOCKTIME
163int __kmp_zero_bt = FALSE;
164#endif /* KMP_ADJUST_BLOCKTIME */
165#ifdef KMP_DFLT_NTH_CORES
166int __kmp_ncores = 0;
167#endif
168int __kmp_chunk = 0;
169int __kmp_force_monotonic = 0;
170int __kmp_abort_delay = 0;
171#if KMP_OS_LINUX && defined(KMP_TDATA_GTID)
172int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */
173int __kmp_adjust_gtid_mode = FALSE;
174#elif KMP_OS_WINDOWS
175int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */
176int __kmp_adjust_gtid_mode = FALSE;
177#else
178int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */
179int __kmp_adjust_gtid_mode = TRUE;
180#endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */
181#ifdef KMP_TDATA_GTID
182KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE;
183#endif /* KMP_TDATA_GTID */
184int __kmp_tls_gtid_min = INT_MAX;
185int __kmp_foreign_tp = TRUE;
186#if KMP_ARCH_X86 || KMP_ARCH_X86_64
187int __kmp_inherit_fp_control = TRUE;
188kmp_int16 __kmp_init_x87_fpu_control_word = 0;
189kmp_uint32 __kmp_init_mxcsr = 0;
190#endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
191
192#ifdef USE_LOAD_BALANCE
193double __kmp_load_balance_interval = 1.0;
194#endif /* USE_LOAD_BALANCE */
195
196kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0};
197
198#if KMP_USE_ADAPTIVE_LOCKS
199
200kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = {
201 1, 1024}; // TODO: tune it!
202
203#if KMP_DEBUG_ADAPTIVE_LOCKS
204const char *__kmp_speculative_statsfile = "-";
205#endif
206
207#endif // KMP_USE_ADAPTIVE_LOCKS
208
209int __kmp_display_env = FALSE;
210int __kmp_display_env_verbose = FALSE;
211int __kmp_omp_cancellation = FALSE;
212int __kmp_nteams = 0;
213int __kmp_teams_thread_limit = 0;
214
215#if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT
216int __kmp_user_level_mwait = FALSE;
217int __kmp_umwait_enabled = FALSE;
218int __kmp_mwait_enabled = FALSE;
219int __kmp_mwait_hints = 0;
220#endif
221
222/* map OMP 3.0 schedule types with our internal schedule types */
223enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext +
224 kmp_sched_upper_std - kmp_sched_lower - 2] = {
225 kmp_sch_static_chunked, // ==> kmp_sched_static = 1
226 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2
227 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3
228 kmp_sch_auto, // ==> kmp_sched_auto = 4
229 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101
230 // will likely not be used, introduced here just to debug the code
231 // of public intel extension schedules
232};
233
234#if KMP_OS_LINUX
235enum clock_function_type __kmp_clock_function;
236int __kmp_clock_function_param;
237#endif /* KMP_OS_LINUX */
238
239#if KMP_MIC_SUPPORTED
240enum mic_type __kmp_mic_type = non_mic;
241#endif
242
243#if KMP_AFFINITY_SUPPORTED
244
245KMPAffinity *__kmp_affinity_dispatch = NULL;
246
247#if KMP_USE_HWLOC
248int __kmp_hwloc_error = FALSE;
249hwloc_topology_t __kmp_hwloc_topology = NULL;
250#endif
251
252#if KMP_OS_WINDOWS
253#if KMP_GROUP_AFFINITY
254int __kmp_num_proc_groups = 1;
255#endif /* KMP_GROUP_AFFINITY */
256kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
257kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
258kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
259kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
260#endif /* KMP_OS_WINDOWS */
261
262size_t __kmp_affin_mask_size = 0;
263enum affinity_type __kmp_affinity_type = affinity_default;
264kmp_hw_t __kmp_affinity_gran = KMP_HW_UNKNOWN;
265int __kmp_affinity_gran_levels = -1;
266int __kmp_affinity_dups = TRUE;
267enum affinity_top_method __kmp_affinity_top_method =
268 affinity_top_method_default;
269int __kmp_affinity_compact = 0;
270int __kmp_affinity_offset = 0;
271int __kmp_affinity_verbose = FALSE;
272int __kmp_affinity_warnings = TRUE;
273int __kmp_affinity_respect_mask = affinity_respect_mask_default;
274char *__kmp_affinity_proclist = NULL;
275kmp_affin_mask_t *__kmp_affinity_masks = NULL;
276unsigned __kmp_affinity_num_masks = 0;
277
278char *__kmp_cpuinfo_file = NULL;
279
280#endif /* KMP_AFFINITY_SUPPORTED */
281
282kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
283int __kmp_affinity_num_places = 0;
284int __kmp_display_affinity = FALSE;
285char *__kmp_affinity_format = NULL;
286
287kmp_int32 __kmp_default_device = 0;
288
289kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
290kmp_int32 __kmp_max_task_priority = 0;
291kmp_uint64 __kmp_taskloop_min_tasks = 0;
292
293int __kmp_memkind_available = 0;
294omp_allocator_handle_t const omp_null_allocator = NULL;
295omp_allocator_handle_t const omp_default_mem_alloc =
296 (omp_allocator_handle_t const)1;
297omp_allocator_handle_t const omp_large_cap_mem_alloc =
298 (omp_allocator_handle_t const)2;
299omp_allocator_handle_t const omp_const_mem_alloc =
300 (omp_allocator_handle_t const)3;
301omp_allocator_handle_t const omp_high_bw_mem_alloc =
302 (omp_allocator_handle_t const)4;
303omp_allocator_handle_t const omp_low_lat_mem_alloc =
304 (omp_allocator_handle_t const)5;
305omp_allocator_handle_t const omp_cgroup_mem_alloc =
306 (omp_allocator_handle_t const)6;
307omp_allocator_handle_t const omp_pteam_mem_alloc =
308 (omp_allocator_handle_t const)7;
309omp_allocator_handle_t const omp_thread_mem_alloc =
310 (omp_allocator_handle_t const)8;
311// Preview of target memory support
312omp_allocator_handle_t const llvm_omp_target_host_mem_alloc =
313 (omp_allocator_handle_t const)100;
314omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc =
315 (omp_allocator_handle_t const)101;
316omp_allocator_handle_t const llvm_omp_target_device_mem_alloc =
317 (omp_allocator_handle_t const)102;
318omp_allocator_handle_t const kmp_max_mem_alloc =
319 (omp_allocator_handle_t const)1024;
320omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;
321
322omp_memspace_handle_t const omp_default_mem_space =
323 (omp_memspace_handle_t const)0;
324omp_memspace_handle_t const omp_large_cap_mem_space =
325 (omp_memspace_handle_t const)1;
326omp_memspace_handle_t const omp_const_mem_space =
327 (omp_memspace_handle_t const)2;
328omp_memspace_handle_t const omp_high_bw_mem_space =
329 (omp_memspace_handle_t const)3;
330omp_memspace_handle_t const omp_low_lat_mem_space =
331 (omp_memspace_handle_t const)4;
332// Preview of target memory support
333omp_memspace_handle_t const llvm_omp_target_host_mem_space =
334 (omp_memspace_handle_t const)100;
335omp_memspace_handle_t const llvm_omp_target_shared_mem_space =
336 (omp_memspace_handle_t const)101;
337omp_memspace_handle_t const llvm_omp_target_device_mem_space =
338 (omp_memspace_handle_t const)102;
339
340/* This check ensures that the compiler is passing the correct data type for the
341 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
342 not a 4-byte type, then give an error message about a non-positive length
343 array pointing here. If that happens, the kmp_tasking_flags_t structure must
344 be redefined to have exactly 32 bits. */
345KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
346
347int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
348int __kmp_enable_task_throttling = 1;
349
350#ifdef DEBUG_SUSPEND
351int __kmp_suspend_count = 0;
352#endif
353
354int __kmp_settings = FALSE;
355int __kmp_duplicate_library_ok = 0;
356#if USE_ITT_BUILD
357int __kmp_forkjoin_frames = 1;
358int __kmp_forkjoin_frames_mode = 3;
359#endif
360PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
361 reduction_method_not_defined;
362int __kmp_determ_red = FALSE;
363
364#ifdef KMP_DEBUG
365int kmp_a_debug = 0;
366int kmp_b_debug = 0;
367int kmp_c_debug = 0;
368int kmp_d_debug = 0;
369int kmp_e_debug = 0;
370int kmp_f_debug = 0;
371int kmp_diag = 0;
372#endif
373
374/* For debug information logging using rotating buffer */
375int __kmp_debug_buf =
376 FALSE; /* TRUE means use buffer, FALSE means print to stderr */
377int __kmp_debug_buf_lines =
378 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
379int __kmp_debug_buf_chars =
380 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
381int __kmp_debug_buf_atomic =
382 FALSE; /* TRUE means use atomic update of buffer entry pointer */
383
384char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
385std::atomic<int> __kmp_debug_count =
386 ATOMIC_VAR_INIT(0); /* number of lines printed in buffer so far */
387int __kmp_debug_buf_warn_chars =
388 0; /* Keep track of char increase recommended in warnings */
389/* end rotating debug buffer */
390
391#ifdef KMP_DEBUG
392int __kmp_par_range; /* +1 => only go par for constructs in range */
393/* -1 => only go par for constructs outside range */
394char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
395char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
396int __kmp_par_range_lb = 0;
397int __kmp_par_range_ub = INT_MAX;
398#endif /* KMP_DEBUG */
399
400/* For printing out dynamic storage map for threads and teams */
401int __kmp_storage_map =
402 FALSE; /* True means print storage map for threads and teams */
403int __kmp_storage_map_verbose =
404 FALSE; /* True means storage map includes placement info */
405int __kmp_storage_map_verbose_specified = FALSE;
406/* Initialize the library data structures when we fork a child process, defaults
407 * to TRUE */
408int __kmp_need_register_atfork =
409 TRUE; /* At initialization, call pthread_atfork to install fork handler */
410int __kmp_need_register_atfork_specified = TRUE;
411
412int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
413int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
414int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
415int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
416
417// From KMP_USE_YIELD:
418// 0 = never yield;
419// 1 = always yield (default);
420// 2 = yield only if oversubscribed
421kmp_int32 __kmp_use_yield = 1;
422// This will be 1 if KMP_USE_YIELD environment variable was set explicitly
423kmp_int32 __kmp_use_yield_exp_set = 0;
424
425kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
426kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
427
428/* ------------------------------------------------------ */
429/* STATE mostly syncronized with global lock */
430/* data written to rarely by primary threads, read often by workers */
431/* TODO: None of this global padding stuff works consistently because the order
432 of declaration is not necessarily correlated to storage order. To fix this,
433 all the important globals must be put in a big structure instead. */
434KMP_ALIGN_CACHE
435kmp_info_t **__kmp_threads = NULL;
436kmp_root_t **__kmp_root = NULL;
437
438/* data read/written to often by primary threads */
439KMP_ALIGN_CACHE
440volatile int __kmp_nth = 0;
441volatile int __kmp_all_nth = 0;
442volatile kmp_info_t *__kmp_thread_pool = NULL;
443volatile kmp_team_t *__kmp_team_pool = NULL;
444
445KMP_ALIGN_CACHE
446std::atomic<int> __kmp_thread_pool_active_nth = ATOMIC_VAR_INIT(0);
447
448/* -------------------------------------------------
449 * GLOBAL/ROOT STATE */
450KMP_ALIGN_CACHE
451kmp_global_t __kmp_global;
452
453/* ----------------------------------------------- */
454/* GLOBAL SYNCHRONIZATION LOCKS */
455/* TODO verify the need for these locks and if they need to be global */
456
457#if KMP_USE_INTERNODE_ALIGNMENT
458/* Multinode systems have larger cache line granularity which can cause
459 * false sharing if the alignment is not large enough for these locks */
460KMP_ALIGN_CACHE_INTERNODE
461
462KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
463KMP_ALIGN_CACHE_INTERNODE
464KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
465KMP_ALIGN_CACHE_INTERNODE
466KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
467#if KMP_USE_MONITOR
468/* control monitor thread creation */
469KMP_ALIGN_CACHE_INTERNODE
470KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
471#endif
472/* used for the hack to allow threadprivate cache and __kmp_threads expansion
473 to co-exist */
474KMP_ALIGN_CACHE_INTERNODE
475KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
476
477KMP_ALIGN_CACHE_INTERNODE
478KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
479KMP_ALIGN_CACHE_INTERNODE
480kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
481KMP_ALIGN_CACHE_INTERNODE
482KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
483#else
484KMP_ALIGN_CACHE
485
486KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
487KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
488KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
489#if KMP_USE_MONITOR
490/* control monitor thread creation */
491KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
492#endif
493/* used for the hack to allow threadprivate cache and __kmp_threads expansion
494 to co-exist */
495KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
496
497KMP_ALIGN(128)
498KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
499KMP_ALIGN(128)
500kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
501KMP_ALIGN(128)
502KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
503#endif
504
505/* ----------------------------------------------- */
506
507#if KMP_HANDLE_SIGNALS
508/* Signal handling is disabled by default, because it confuses users: In case of
509 sigsegv (or other trouble) in user code signal handler catches the signal,
510 which then "appears" in the monitor thread (when the monitor executes raise()
511 function). Users see signal in the monitor thread and blame OpenMP RTL.
512
513 Grant said signal handling required on some older OSes (Irix?) supported by
514 KAI, because bad applications hung but not aborted. Currently it is not a
515 problem for Linux* OS, OS X* and Windows* OS.
516
517 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm
518 putting the default back for now to see if that fixes hangs on those
519 machines.
520
521 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
522 stack backtrace when program is aborting, but the code is not signal-safe.
523 When multiple signals raised at the same time (which occurs in dynamic
524 negative tests because all the worker threads detects the same error),
525 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
526 by Steve R., and will be available soon. */
527int __kmp_handle_signals = FALSE;
528#endif
529
530#ifdef DEBUG_SUSPEND
531int get_suspend_count_(void) {
532 int count = __kmp_suspend_count;
533 __kmp_suspend_count = 0;
534 return count;
535}
536void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
537#endif
538
539// Symbols for MS mutual detection.
540int _You_must_link_with_exactly_one_OpenMP_library = 1;
541int _You_must_link_with_Intel_OpenMP_library = 1;
542#if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4)
543int _You_must_link_with_Microsoft_OpenMP_library = 1;
544#endif
545
546kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
547
548// OMP Pause Resources
549kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
550
551// Nesting mode
552int __kmp_nesting_mode = 0;
553int __kmp_nesting_mode_nlevels = 1;
554int *__kmp_nesting_nth_level;
555
556// end of file //
sched_type
Definition: kmp.h:355
@ kmp_sch_auto
Definition: kmp.h:362
@ kmp_sch_default
Definition: kmp.h:463
@ kmp_sch_guided_chunked
Definition: kmp.h:360