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_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_MONITOR
54volatile int __kmp_init_monitor =
55 0; /* 1 - launched, 2 - actually started (Windows* OS only) */
56#endif
57volatile 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 = ATOMIC_VAR_INIT(0);
67std::atomic<kmp_int32> __kmp_task_counter = ATOMIC_VAR_INIT(0);
68
69size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
70#if KMP_USE_MONITOR
71size_t __kmp_monitor_stksize = 0; // auto adjust
72#endif
73size_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_BARRIER
97 ,
98 "KMP_REDUCTION_BARRIER"
99#endif // KMP_FAST_REDUCTION_BARRIER
100};
101char 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};
108char 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};
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_teams_max_nth = 0;
129int __kmp_threads_capacity = 0;
130int __kmp_dflt_team_nth = 0;
131int __kmp_dflt_team_nth_ub = 0;
132int __kmp_tp_capacity = 0;
133int __kmp_tp_cached = 0;
134int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;
135int __kmp_dflt_max_active_levels = 1; // Nesting off by default
136bool __kmp_dflt_max_active_levels_set = false; // Don't override set value
137#if KMP_NESTED_HOT_TEAMS
138int __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 */
141#endif
142enum library_type __kmp_library = library_none;
143enum sched_type __kmp_sched =
144 kmp_sch_default; /* scheduling method for runtime scheduling */
145enum sched_type __kmp_static =
146 kmp_sch_static_greedy; /* default static scheduling method */
147enum sched_type __kmp_guided =
148 kmp_sch_guided_iterative_chunked; /* default guided scheduling method */
149enum sched_type __kmp_auto =
150 kmp_sch_guided_analytical_chunked; /* default auto scheduling method */
151#if KMP_USE_HIER_SCHED
152int __kmp_dispatch_hand_threading = 0;
153int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1];
154int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1];
155kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL};
156#endif
157int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME;
158bool __kmp_wpolicy_passive = false;
159#if KMP_USE_MONITOR
160int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;
161int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME,
162 KMP_MIN_MONITOR_WAKEUPS);
163#endif
164#ifdef KMP_ADJUST_BLOCKTIME
165int __kmp_zero_bt = FALSE;
166#endif /* KMP_ADJUST_BLOCKTIME */
167#ifdef KMP_DFLT_NTH_CORES
168int __kmp_ncores = 0;
169#endif
170int __kmp_chunk = 0;
171int __kmp_force_monotonic = 0;
172int __kmp_abort_delay = 0;
173#if KMP_OS_LINUX && 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_WINDOWS
177int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */
178int __kmp_adjust_gtid_mode = FALSE;
179#else
180int __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_GTID
184KMP_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_64
189int __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_BALANCE
195double __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_LOCKS
201
202kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = {
203 1, 1024}; // TODO: tune it!
204
205#if KMP_DEBUG_ADAPTIVE_LOCKS
206const char *__kmp_speculative_statsfile = "-";
207#endif
208
209#endif // KMP_USE_ADAPTIVE_LOCKS
210
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_UMWAIT
218int __kmp_user_level_mwait = FALSE;
219int __kmp_umwait_enabled = FALSE;
220int __kmp_mwait_enabled = FALSE;
221int __kmp_mwait_hints = 0;
222#endif
223
224#if KMP_HAVE_UMWAIT
225int __kmp_waitpkg_enabled = 0;
226int __kmp_tpause_state = 0;
227int __kmp_tpause_hint = 1;
228int __kmp_tpause_enabled = 0;
229#endif
230
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 = 1
235 kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2
236 kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3
237 kmp_sch_auto, // ==> kmp_sched_auto = 4
238 kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101
239 // will likely not be used, introduced here just to debug the code
240 // of public intel extension schedules
241};
242
243#if KMP_OS_LINUX
244enum clock_function_type __kmp_clock_function;
245int __kmp_clock_function_param;
246#endif /* KMP_OS_LINUX */
247
248#if KMP_MIC_SUPPORTED
249enum mic_type __kmp_mic_type = non_mic;
250#endif
251
252#if KMP_AFFINITY_SUPPORTED
253
254KMPAffinity *__kmp_affinity_dispatch = NULL;
255
256#if KMP_USE_HWLOC
257int __kmp_hwloc_error = FALSE;
258hwloc_topology_t __kmp_hwloc_topology = NULL;
259#endif
260
261#if KMP_OS_WINDOWS
262#if KMP_GROUP_AFFINITY
263int __kmp_num_proc_groups = 1;
264#endif /* KMP_GROUP_AFFINITY */
265kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
266kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
267kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
268kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
269#endif /* KMP_OS_WINDOWS */
270
271size_t __kmp_affin_mask_size = 0;
272enum affinity_type __kmp_affinity_type = affinity_default;
273kmp_hw_t __kmp_affinity_gran = KMP_HW_UNKNOWN;
274int __kmp_affinity_gran_levels = -1;
275int __kmp_affinity_dups = TRUE;
276enum affinity_top_method __kmp_affinity_top_method =
277 affinity_top_method_default;
278int __kmp_affinity_compact = 0;
279int __kmp_affinity_offset = 0;
280int __kmp_affinity_verbose = FALSE;
281int __kmp_affinity_warnings = TRUE;
282int __kmp_affinity_respect_mask = affinity_respect_mask_default;
283char *__kmp_affinity_proclist = NULL;
284kmp_affin_mask_t *__kmp_affinity_masks = NULL;
285unsigned __kmp_affinity_num_masks = 0;
286
287char *__kmp_cpuinfo_file = NULL;
288bool __kmp_affin_reset = 0;
289
290#endif /* KMP_AFFINITY_SUPPORTED */
291
292kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
293kmp_proc_bind_t __kmp_teams_proc_bind = proc_bind_spread;
294int __kmp_affinity_num_places = 0;
295int __kmp_display_affinity = FALSE;
296char *__kmp_affinity_format = NULL;
297
298kmp_int32 __kmp_default_device = 0;
299
300kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
301kmp_int32 __kmp_max_task_priority = 0;
302kmp_uint64 __kmp_taskloop_min_tasks = 0;
303
304int __kmp_memkind_available = 0;
305omp_allocator_handle_t const omp_null_allocator = NULL;
306omp_allocator_handle_t const omp_default_mem_alloc =
307 (omp_allocator_handle_t const)1;
308omp_allocator_handle_t const omp_large_cap_mem_alloc =
309 (omp_allocator_handle_t const)2;
310omp_allocator_handle_t const omp_const_mem_alloc =
311 (omp_allocator_handle_t const)3;
312omp_allocator_handle_t const omp_high_bw_mem_alloc =
313 (omp_allocator_handle_t const)4;
314omp_allocator_handle_t const omp_low_lat_mem_alloc =
315 (omp_allocator_handle_t const)5;
316omp_allocator_handle_t const omp_cgroup_mem_alloc =
317 (omp_allocator_handle_t const)6;
318omp_allocator_handle_t const omp_pteam_mem_alloc =
319 (omp_allocator_handle_t const)7;
320omp_allocator_handle_t const omp_thread_mem_alloc =
321 (omp_allocator_handle_t const)8;
322omp_allocator_handle_t const llvm_omp_target_host_mem_alloc =
323 (omp_allocator_handle_t const)100;
324omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc =
325 (omp_allocator_handle_t const)101;
326omp_allocator_handle_t const llvm_omp_target_device_mem_alloc =
327 (omp_allocator_handle_t const)102;
328omp_allocator_handle_t const kmp_max_mem_alloc =
329 (omp_allocator_handle_t const)1024;
330omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;
331
332omp_memspace_handle_t const omp_default_mem_space =
333 (omp_memspace_handle_t const)0;
334omp_memspace_handle_t const omp_large_cap_mem_space =
335 (omp_memspace_handle_t const)1;
336omp_memspace_handle_t const omp_const_mem_space =
337 (omp_memspace_handle_t const)2;
338omp_memspace_handle_t const omp_high_bw_mem_space =
339 (omp_memspace_handle_t const)3;
340omp_memspace_handle_t const omp_low_lat_mem_space =
341 (omp_memspace_handle_t const)4;
342omp_memspace_handle_t const llvm_omp_target_host_mem_space =
343 (omp_memspace_handle_t const)100;
344omp_memspace_handle_t const llvm_omp_target_shared_mem_space =
345 (omp_memspace_handle_t const)101;
346omp_memspace_handle_t const llvm_omp_target_device_mem_space =
347 (omp_memspace_handle_t const)102;
348
349/* This check ensures that the compiler is passing the correct data type for the
350 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
351 not a 4-byte type, then give an error message about a non-positive length
352 array pointing here. If that happens, the kmp_tasking_flags_t structure must
353 be redefined to have exactly 32 bits. */
354KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
355
356int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
357int __kmp_enable_task_throttling = 1;
358
359#ifdef DEBUG_SUSPEND
360int __kmp_suspend_count = 0;
361#endif
362
363int __kmp_settings = FALSE;
364int __kmp_duplicate_library_ok = 0;
365#if USE_ITT_BUILD
366int __kmp_forkjoin_frames = 1;
367int __kmp_forkjoin_frames_mode = 3;
368#endif
369PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
370 reduction_method_not_defined;
371int __kmp_determ_red = FALSE;
372
373#ifdef KMP_DEBUG
374int kmp_a_debug = 0;
375int kmp_b_debug = 0;
376int kmp_c_debug = 0;
377int kmp_d_debug = 0;
378int kmp_e_debug = 0;
379int kmp_f_debug = 0;
380int kmp_diag = 0;
381#endif
382
383/* For debug information logging using rotating buffer */
384int __kmp_debug_buf =
385 FALSE; /* TRUE means use buffer, FALSE means print to stderr */
386int __kmp_debug_buf_lines =
387 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
388int __kmp_debug_buf_chars =
389 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
390int __kmp_debug_buf_atomic =
391 FALSE; /* TRUE means use atomic update of buffer entry pointer */
392
393char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
394std::atomic<int> __kmp_debug_count =
395 ATOMIC_VAR_INIT(0); /* number of lines printed in buffer so far */
396int __kmp_debug_buf_warn_chars =
397 0; /* Keep track of char increase recommended in warnings */
398/* end rotating debug buffer */
399
400#ifdef KMP_DEBUG
401int __kmp_par_range; /* +1 => only go par for constructs in range */
402/* -1 => only go par for constructs outside range */
403char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
404char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
405int __kmp_par_range_lb = 0;
406int __kmp_par_range_ub = INT_MAX;
407#endif /* KMP_DEBUG */
408
409/* For printing out dynamic storage map for threads and teams */
410int __kmp_storage_map =
411 FALSE; /* True means print storage map for threads and teams */
412int __kmp_storage_map_verbose =
413 FALSE; /* True means storage map includes placement info */
414int __kmp_storage_map_verbose_specified = FALSE;
415/* Initialize the library data structures when we fork a child process, defaults
416 * to TRUE */
417int __kmp_need_register_atfork =
418 TRUE; /* At initialization, call pthread_atfork to install fork handler */
419int __kmp_need_register_atfork_specified = TRUE;
420
421int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
422int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
423int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
424int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
425
426// From KMP_USE_YIELD:
427// 0 = never yield;
428// 1 = always yield (default);
429// 2 = yield only if oversubscribed
430#if KMP_OS_DARWIN && KMP_ARCH_AARCH64
431// Set to 0 for environments where yield is slower
432kmp_int32 __kmp_use_yield = 0;
433#else
434kmp_int32 __kmp_use_yield = 1;
435#endif
436
437// This will be 1 if KMP_USE_YIELD environment variable was set explicitly
438kmp_int32 __kmp_use_yield_exp_set = 0;
439
440kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
441kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
442kmp_uint64 __kmp_pause_init = 1; // for tpause
443
444/* ------------------------------------------------------ */
445/* STATE mostly syncronized with global lock */
446/* data written to rarely by primary threads, read often by workers */
447/* TODO: None of this global padding stuff works consistently because the order
448 of declaration is not necessarily correlated to storage order. To fix this,
449 all the important globals must be put in a big structure instead. */
450KMP_ALIGN_CACHE
451kmp_info_t **__kmp_threads = NULL;
452kmp_root_t **__kmp_root = NULL;
453kmp_old_threads_list_t *__kmp_old_threads_list = NULL;
454
455/* data read/written to often by primary threads */
456KMP_ALIGN_CACHE
457volatile int __kmp_nth = 0;
458volatile int __kmp_all_nth = 0;
459volatile kmp_info_t *__kmp_thread_pool = NULL;
460volatile kmp_team_t *__kmp_team_pool = NULL;
461
462KMP_ALIGN_CACHE
463std::atomic<int> __kmp_thread_pool_active_nth = ATOMIC_VAR_INIT(0);
464
465/* -------------------------------------------------
466 * GLOBAL/ROOT STATE */
467KMP_ALIGN_CACHE
468kmp_global_t __kmp_global;
469
470/* ----------------------------------------------- */
471/* GLOBAL SYNCHRONIZATION LOCKS */
472/* TODO verify the need for these locks and if they need to be global */
473
474#if KMP_USE_INTERNODE_ALIGNMENT
475/* Multinode systems have larger cache line granularity which can cause
476 * false sharing if the alignment is not large enough for these locks */
477KMP_ALIGN_CACHE_INTERNODE
478
479KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
480KMP_ALIGN_CACHE_INTERNODE
481KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
482KMP_ALIGN_CACHE_INTERNODE
483KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
484#if KMP_USE_MONITOR
485/* control monitor thread creation */
486KMP_ALIGN_CACHE_INTERNODE
487KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
488#endif
489/* used for the hack to allow threadprivate cache and __kmp_threads expansion
490 to co-exist */
491KMP_ALIGN_CACHE_INTERNODE
492KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
493
494KMP_ALIGN_CACHE_INTERNODE
495KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
496KMP_ALIGN_CACHE_INTERNODE
497kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
498KMP_ALIGN_CACHE_INTERNODE
499KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
500#else
501KMP_ALIGN_CACHE
502
503KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
504KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
505KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
506#if KMP_USE_MONITOR
507/* control monitor thread creation */
508KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
509#endif
510/* used for the hack to allow threadprivate cache and __kmp_threads expansion
511 to co-exist */
512KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
513
514KMP_ALIGN(128)
515KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
516KMP_ALIGN(128)
517kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
518KMP_ALIGN(128)
519KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
520#endif
521
522/* ----------------------------------------------- */
523
524#if KMP_HANDLE_SIGNALS
525/* Signal handling is disabled by default, because it confuses users: In case of
526 sigsegv (or other trouble) in user code signal handler catches the signal,
527 which then "appears" in the monitor thread (when the monitor executes raise()
528 function). Users see signal in the monitor thread and blame OpenMP RTL.
529
530 Grant said signal handling required on some older OSes (Irix?) supported by
531 KAI, because bad applications hung but not aborted. Currently it is not a
532 problem for Linux* OS, OS X* and Windows* OS.
533
534 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm
535 putting the default back for now to see if that fixes hangs on those
536 machines.
537
538 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
539 stack backtrace when program is aborting, but the code is not signal-safe.
540 When multiple signals raised at the same time (which occurs in dynamic
541 negative tests because all the worker threads detects the same error),
542 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
543 by Steve R., and will be available soon. */
544int __kmp_handle_signals = FALSE;
545#endif
546
547#ifdef DEBUG_SUSPEND
548int get_suspend_count_(void) {
549 int count = __kmp_suspend_count;
550 __kmp_suspend_count = 0;
551 return count;
552}
553void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
554#endif
555
556// Symbols for MS mutual detection.
557int _You_must_link_with_exactly_one_OpenMP_library = 1;
558int _You_must_link_with_Intel_OpenMP_library = 1;
559#if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4)
560int _You_must_link_with_Microsoft_OpenMP_library = 1;
561#endif
562
563kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
564
565// OMP Pause Resources
566kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
567
568// Nesting mode
569int __kmp_nesting_mode = 0;
570int __kmp_nesting_mode_nlevels = 1;
571int *__kmp_nesting_nth_level;
572
573// end of file //
sched_type
Definition: kmp.h:357
@ kmp_sch_auto
Definition: kmp.h:364
@ kmp_sch_default
Definition: kmp.h:465
@ kmp_sch_guided_chunked
Definition: kmp.h:362