LLVM OpenMP* Runtime Library
kmp_global.cpp
1 /*
2  * kmp_global.cpp -- KPTS global variables for runtime support library
3  */
4 
5 //===----------------------------------------------------------------------===//
6 //
7 // The LLVM Compiler Infrastructure
8 //
9 // This file is dual licensed under the MIT and the University of Illinois Open
10 // Source Licenses. See LICENSE.txt for details.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "kmp.h"
15 #include "kmp_affinity.h"
16 #if KMP_USE_HIER_SCHED
17 #include "kmp_dispatch_hier.h"
18 #endif
19 
20 kmp_key_t __kmp_gtid_threadprivate_key;
21 
22 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
23 kmp_cpuinfo_t __kmp_cpuinfo = {0}; // Not initialized
24 #endif
25 
26 #if KMP_STATS_ENABLED
27 #include "kmp_stats.h"
28 // lock for modifying the global __kmp_stats_list
29 kmp_tas_lock_t __kmp_stats_lock;
30 
31 // global list of per thread stats, the head is a sentinel node which
32 // accumulates all stats produced before __kmp_create_worker is called.
33 kmp_stats_list *__kmp_stats_list;
34 
35 // thread local pointer to stats node within list
36 KMP_THREAD_LOCAL kmp_stats_list *__kmp_stats_thread_ptr = NULL;
37 
38 // gives reference tick for all events (considered the 0 tick)
39 tsc_tick_count __kmp_stats_start_time;
40 #endif
41 
42 /* ----------------------------------------------------- */
43 /* INITIALIZATION VARIABLES */
44 /* they are syncronized to write during init, but read anytime */
45 volatile int __kmp_init_serial = FALSE;
46 volatile int __kmp_init_gtid = FALSE;
47 volatile int __kmp_init_common = FALSE;
48 volatile int __kmp_init_middle = FALSE;
49 volatile int __kmp_init_parallel = FALSE;
50 #if KMP_USE_MONITOR
51 volatile int __kmp_init_monitor =
52  0; /* 1 - launched, 2 - actually started (Windows* OS only) */
53 #endif
54 volatile int __kmp_init_user_locks = FALSE;
55 
56 /* list of address of allocated caches for commons */
57 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;
58 
59 int __kmp_init_counter = 0;
60 int __kmp_root_counter = 0;
61 int __kmp_version = 0;
62 
63 std::atomic<kmp_int32> __kmp_team_counter = ATOMIC_VAR_INIT(0);
64 std::atomic<kmp_int32> __kmp_task_counter = ATOMIC_VAR_INIT(0);
65 
66 unsigned int __kmp_init_wait =
67  KMP_DEFAULT_INIT_WAIT; /* initial number of spin-tests */
68 unsigned int __kmp_next_wait =
69  KMP_DEFAULT_NEXT_WAIT; /* susequent number of spin-tests */
70 
71 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
72 #if KMP_USE_MONITOR
73 size_t __kmp_monitor_stksize = 0; // auto adjust
74 #endif
75 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;
76 int __kmp_stkpadding = KMP_MIN_STKPADDING;
77 
78 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR;
79 
80 // Barrier method defaults, settings, and strings.
81 // branch factor = 2^branch_bits (only relevant for tree & hyper barrier types)
82 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2;
83 /* branch_factor = 4 */ /* hyper2: C78980 */
84 kmp_uint32 __kmp_barrier_release_bb_dflt = 2;
85 /* branch_factor = 4 */ /* hyper2: C78980 */
86 
87 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar;
88 /* hyper2: C78980 */
89 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar;
90 /* hyper2: C78980 */
91 
92 kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0};
93 kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0};
94 kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar};
95 kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar};
96 char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = {
97  "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"
98 #if KMP_FAST_REDUCTION_BARRIER
99  ,
100  "KMP_REDUCTION_BARRIER"
101 #endif // KMP_FAST_REDUCTION_BARRIER
102 };
103 char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = {
104  "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN"
105 #if KMP_FAST_REDUCTION_BARRIER
106  ,
107  "KMP_REDUCTION_BARRIER_PATTERN"
108 #endif // KMP_FAST_REDUCTION_BARRIER
109 };
110 char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin"
111 #if KMP_FAST_REDUCTION_BARRIER
112  ,
113  "reduction"
114 #endif // KMP_FAST_REDUCTION_BARRIER
115 };
116 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear", "tree",
117  "hyper", "hierarchical"};
118 
119 int __kmp_allThreadsSpecified = 0;
120 size_t __kmp_align_alloc = CACHE_LINE;
121 
122 int __kmp_generate_warnings = kmp_warnings_low;
123 int __kmp_reserve_warn = 0;
124 int __kmp_xproc = 0;
125 int __kmp_avail_proc = 0;
126 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;
127 int __kmp_sys_max_nth = KMP_MAX_NTH;
128 int __kmp_max_nth = 0;
129 int __kmp_cg_max_nth = 0;
130 int __kmp_teams_max_nth = 0;
131 int __kmp_threads_capacity = 0;
132 int __kmp_dflt_team_nth = 0;
133 int __kmp_dflt_team_nth_ub = 0;
134 int __kmp_tp_capacity = 0;
135 int __kmp_tp_cached = 0;
136 int __kmp_dflt_nested = FALSE;
137 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;
138 int __kmp_dflt_max_active_levels =
139  KMP_MAX_ACTIVE_LEVELS_LIMIT; /* max_active_levels limit */
140 #if KMP_NESTED_HOT_TEAMS
141 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */
142 /* 1 - keep extra threads when reduced */
143 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */
144 #endif
145 enum library_type __kmp_library = library_none;
146 enum sched_type __kmp_sched =
147  kmp_sch_default; /* scheduling method for runtime scheduling */
148 enum sched_type __kmp_static =
149  kmp_sch_static_greedy; /* default static scheduling method */
150 enum sched_type __kmp_guided =
151  kmp_sch_guided_iterative_chunked; /* default guided scheduling method */
152 enum sched_type __kmp_auto =
153  kmp_sch_guided_analytical_chunked; /* default auto scheduling method */
154 #if KMP_USE_HIER_SCHED
155 int __kmp_dispatch_hand_threading = 0;
156 int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1];
157 int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1];
158 kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL};
159 #endif
160 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME;
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_abort_delay = 0;
174 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID)
175 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */
176 int __kmp_adjust_gtid_mode = FALSE;
177 #elif KMP_OS_WINDOWS
178 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */
179 int __kmp_adjust_gtid_mode = FALSE;
180 #else
181 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */
182 int __kmp_adjust_gtid_mode = TRUE;
183 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */
184 #ifdef KMP_TDATA_GTID
185 KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE;
186 #endif /* KMP_TDATA_GTID */
187 int __kmp_tls_gtid_min = INT_MAX;
188 int __kmp_foreign_tp = TRUE;
189 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
190 int __kmp_inherit_fp_control = TRUE;
191 kmp_int16 __kmp_init_x87_fpu_control_word = 0;
192 kmp_uint32 __kmp_init_mxcsr = 0;
193 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
194 
195 #ifdef USE_LOAD_BALANCE
196 double __kmp_load_balance_interval = 1.0;
197 #endif /* USE_LOAD_BALANCE */
198 
199 kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0};
200 
201 #if KMP_USE_ADAPTIVE_LOCKS
202 
203 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = {
204  1, 1024}; // TODO: tune it!
205 
206 #if KMP_DEBUG_ADAPTIVE_LOCKS
207 const char *__kmp_speculative_statsfile = "-";
208 #endif
209 
210 #endif // KMP_USE_ADAPTIVE_LOCKS
211 
212 #if OMP_40_ENABLED
213 int __kmp_display_env = FALSE;
214 int __kmp_display_env_verbose = FALSE;
215 int __kmp_omp_cancellation = FALSE;
216 #endif
217 
218 /* map OMP 3.0 schedule types with our internal schedule types */
219 enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext +
220  kmp_sched_upper_std - kmp_sched_lower - 2] = {
221  kmp_sch_static_chunked, // ==> kmp_sched_static = 1
222  kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2
223  kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3
224  kmp_sch_auto, // ==> kmp_sched_auto = 4
225  kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101
226  // will likely not be used, introduced here just to debug the code
227  // of public intel extension schedules
228 };
229 
230 #if KMP_OS_LINUX
231 enum clock_function_type __kmp_clock_function;
232 int __kmp_clock_function_param;
233 #endif /* KMP_OS_LINUX */
234 
235 #if KMP_MIC_SUPPORTED
236 enum mic_type __kmp_mic_type = non_mic;
237 #endif
238 
239 #if KMP_AFFINITY_SUPPORTED
240 
241 KMPAffinity *__kmp_affinity_dispatch = NULL;
242 
243 #if KMP_USE_HWLOC
244 int __kmp_hwloc_error = FALSE;
245 hwloc_topology_t __kmp_hwloc_topology = NULL;
246 int __kmp_numa_detected = FALSE;
247 int __kmp_tile_depth = 0;
248 #endif
249 
250 #if KMP_OS_WINDOWS
251 #if KMP_GROUP_AFFINITY
252 int __kmp_num_proc_groups = 1;
253 #endif /* KMP_GROUP_AFFINITY */
254 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
255 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
256 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
257 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
258 #endif /* KMP_OS_WINDOWS */
259 
260 size_t __kmp_affin_mask_size = 0;
261 enum affinity_type __kmp_affinity_type = affinity_default;
262 enum affinity_gran __kmp_affinity_gran = affinity_gran_default;
263 int __kmp_affinity_gran_levels = -1;
264 int __kmp_affinity_dups = TRUE;
265 enum affinity_top_method __kmp_affinity_top_method =
266  affinity_top_method_default;
267 int __kmp_affinity_compact = 0;
268 int __kmp_affinity_offset = 0;
269 int __kmp_affinity_verbose = FALSE;
270 int __kmp_affinity_warnings = TRUE;
271 int __kmp_affinity_respect_mask = affinity_respect_mask_default;
272 char *__kmp_affinity_proclist = NULL;
273 kmp_affin_mask_t *__kmp_affinity_masks = NULL;
274 unsigned __kmp_affinity_num_masks = 0;
275 
276 char *__kmp_cpuinfo_file = NULL;
277 
278 #endif /* KMP_AFFINITY_SUPPORTED */
279 
280 #if OMP_40_ENABLED
281 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
282 int __kmp_affinity_num_places = 0;
283 #endif
284 
285 #if OMP_50_ENABLED
286 int __kmp_display_affinity = FALSE;
287 char *__kmp_affinity_format = NULL;
288 #endif // OMP_50_ENABLED
289 
290 kmp_hws_item_t __kmp_hws_socket = {0, 0};
291 kmp_hws_item_t __kmp_hws_node = {0, 0};
292 kmp_hws_item_t __kmp_hws_tile = {0, 0};
293 kmp_hws_item_t __kmp_hws_core = {0, 0};
294 kmp_hws_item_t __kmp_hws_proc = {0, 0};
295 int __kmp_hws_requested = 0;
296 int __kmp_hws_abs_flag = 0; // absolute or per-item number requested
297 
298 #if OMP_40_ENABLED
299 kmp_int32 __kmp_default_device = 0;
300 #endif
301 
302 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
303 #if OMP_45_ENABLED
304 kmp_int32 __kmp_max_task_priority = 0;
305 kmp_uint64 __kmp_taskloop_min_tasks = 0;
306 #endif
307 
308 #if OMP_50_ENABLED
309 int __kmp_memkind_available = 0;
310 int __kmp_hbw_mem_available = 0;
311 const omp_allocator_t *OMP_NULL_ALLOCATOR = NULL;
312 const omp_allocator_t *omp_default_mem_alloc = (const omp_allocator_t *)1;
313 const omp_allocator_t *omp_large_cap_mem_alloc = (const omp_allocator_t *)2;
314 const omp_allocator_t *omp_const_mem_alloc = (const omp_allocator_t *)3;
315 const omp_allocator_t *omp_high_bw_mem_alloc = (const omp_allocator_t *)4;
316 const omp_allocator_t *omp_low_lat_mem_alloc = (const omp_allocator_t *)5;
317 const omp_allocator_t *omp_cgroup_mem_alloc = (const omp_allocator_t *)6;
318 const omp_allocator_t *omp_pteam_mem_alloc = (const omp_allocator_t *)7;
319 const omp_allocator_t *omp_thread_mem_alloc = (const omp_allocator_t *)8;
320 void *const *__kmp_def_allocator = omp_default_mem_alloc;
321 #endif
322 
323 /* This check ensures that the compiler is passing the correct data type for the
324  flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
325  not a 4-byte type, then give an error message about a non-positive length
326  array pointing here. If that happens, the kmp_tasking_flags_t structure must
327  be redefined to have exactly 32 bits. */
328 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
329 
330 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
331 
332 #ifdef DEBUG_SUSPEND
333 int __kmp_suspend_count = 0;
334 #endif
335 
336 int __kmp_settings = FALSE;
337 int __kmp_duplicate_library_ok = 0;
338 #if USE_ITT_BUILD
339 int __kmp_forkjoin_frames = 1;
340 int __kmp_forkjoin_frames_mode = 3;
341 #endif
342 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
343  reduction_method_not_defined;
344 int __kmp_determ_red = FALSE;
345 
346 #ifdef KMP_DEBUG
347 int kmp_a_debug = 0;
348 int kmp_b_debug = 0;
349 int kmp_c_debug = 0;
350 int kmp_d_debug = 0;
351 int kmp_e_debug = 0;
352 int kmp_f_debug = 0;
353 int kmp_diag = 0;
354 #endif
355 
356 /* For debug information logging using rotating buffer */
357 int __kmp_debug_buf =
358  FALSE; /* TRUE means use buffer, FALSE means print to stderr */
359 int __kmp_debug_buf_lines =
360  KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
361 int __kmp_debug_buf_chars =
362  KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
363 int __kmp_debug_buf_atomic =
364  FALSE; /* TRUE means use atomic update of buffer entry pointer */
365 
366 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
367 std::atomic<int> __kmp_debug_count =
368  ATOMIC_VAR_INIT(0); /* number of lines printed in buffer so far */
369 int __kmp_debug_buf_warn_chars =
370  0; /* Keep track of char increase recommended in warnings */
371 /* end rotating debug buffer */
372 
373 #ifdef KMP_DEBUG
374 int __kmp_par_range; /* +1 => only go par for constructs in range */
375 /* -1 => only go par for constructs outside range */
376 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
377 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
378 int __kmp_par_range_lb = 0;
379 int __kmp_par_range_ub = INT_MAX;
380 #endif /* KMP_DEBUG */
381 
382 /* For printing out dynamic storage map for threads and teams */
383 int __kmp_storage_map =
384  FALSE; /* True means print storage map for threads and teams */
385 int __kmp_storage_map_verbose =
386  FALSE; /* True means storage map includes placement info */
387 int __kmp_storage_map_verbose_specified = FALSE;
388 /* Initialize the library data structures when we fork a child process, defaults
389  * to TRUE */
390 int __kmp_need_register_atfork =
391  TRUE; /* At initialization, call pthread_atfork to install fork handler */
392 int __kmp_need_register_atfork_specified = TRUE;
393 
394 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
395 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
396 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
397 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
398 
399 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
400 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
401 
402 #if KMP_USE_MONITOR
403 kmp_uint32 __kmp_yielding_on = 1;
404 #endif
405 #if KMP_OS_CNK
406 kmp_uint32 __kmp_yield_cycle = 0;
407 #else
408 kmp_uint32 __kmp_yield_cycle = 1; /* Yield-cycle is on by default */
409 #endif
410 kmp_int32 __kmp_yield_on_count =
411  10; /* By default, yielding is on for 10 monitor periods. */
412 kmp_int32 __kmp_yield_off_count =
413  1; /* By default, yielding is off for 1 monitor periods. */
414 
415 /* ------------------------------------------------------ */
416 /* STATE mostly syncronized with global lock */
417 /* data written to rarely by masters, read often by workers */
418 /* TODO: None of this global padding stuff works consistently because the order
419  of declaration is not necessarily correlated to storage order. To fix this,
420  all the important globals must be put in a big structure instead. */
421 KMP_ALIGN_CACHE
422 kmp_info_t **__kmp_threads = NULL;
423 kmp_root_t **__kmp_root = NULL;
424 
425 /* data read/written to often by masters */
426 KMP_ALIGN_CACHE
427 volatile int __kmp_nth = 0;
428 volatile int __kmp_all_nth = 0;
429 int __kmp_thread_pool_nth = 0;
430 volatile kmp_info_t *__kmp_thread_pool = NULL;
431 volatile kmp_team_t *__kmp_team_pool = NULL;
432 
433 KMP_ALIGN_CACHE
434 std::atomic<int> __kmp_thread_pool_active_nth = ATOMIC_VAR_INIT(0);
435 
436 /* -------------------------------------------------
437  * GLOBAL/ROOT STATE */
438 KMP_ALIGN_CACHE
439 kmp_global_t __kmp_global = {{0}};
440 
441 /* ----------------------------------------------- */
442 /* GLOBAL SYNCHRONIZATION LOCKS */
443 /* TODO verify the need for these locks and if they need to be global */
444 
445 #if KMP_USE_INTERNODE_ALIGNMENT
446 /* Multinode systems have larger cache line granularity which can cause
447  * false sharing if the alignment is not large enough for these locks */
448 KMP_ALIGN_CACHE_INTERNODE
449 
450 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
451 KMP_ALIGN_CACHE_INTERNODE
452 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
453 KMP_ALIGN_CACHE_INTERNODE
454 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
455 #if KMP_USE_MONITOR
456 /* control monitor thread creation */
457 KMP_ALIGN_CACHE_INTERNODE
458 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
459 #endif
460 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
461  to co-exist */
462 KMP_ALIGN_CACHE_INTERNODE
463 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
464 
465 KMP_ALIGN_CACHE_INTERNODE
466 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
467 KMP_ALIGN_CACHE_INTERNODE
468 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
469 KMP_ALIGN_CACHE_INTERNODE
470 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
471 #else
472 KMP_ALIGN_CACHE
473 
474 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
475 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
476 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
477 #if KMP_USE_MONITOR
478 /* control monitor thread creation */
479 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
480 #endif
481 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
482  to co-exist */
483 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
484 
485 KMP_ALIGN(128)
486 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
487 KMP_ALIGN(128)
488 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
489 KMP_ALIGN(128)
490 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
491 #endif
492 
493 /* ----------------------------------------------- */
494 
495 #if KMP_HANDLE_SIGNALS
496 /* Signal handling is disabled by default, because it confuses users: In case of
497  sigsegv (or other trouble) in user code signal handler catches the signal,
498  which then "appears" in the monitor thread (when the monitor executes raise()
499  function). Users see signal in the monitor thread and blame OpenMP RTL.
500 
501  Grant said signal handling required on some older OSes (Irix?) supported by
502  KAI, because bad applications hung but not aborted. Currently it is not a
503  problem for Linux* OS, OS X* and Windows* OS.
504 
505  Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm
506  putting the default back for now to see if that fixes hangs on those
507  machines.
508 
509  2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
510  stack backtrace when program is aborting, but the code is not signal-safe.
511  When multiple signals raised at the same time (which occurs in dynamic
512  negative tests because all the worker threads detects the same error),
513  Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
514  by Steve R., and will be available soon. */
515 int __kmp_handle_signals = FALSE;
516 #endif
517 
518 #ifdef DEBUG_SUSPEND
519 int get_suspend_count_(void) {
520  int count = __kmp_suspend_count;
521  __kmp_suspend_count = 0;
522  return count;
523 }
524 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
525 #endif
526 
527 // Symbols for MS mutual detection.
528 int _You_must_link_with_exactly_one_OpenMP_library = 1;
529 int _You_must_link_with_Intel_OpenMP_library = 1;
530 #if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4)
531 int _You_must_link_with_Microsoft_OpenMP_library = 1;
532 #endif
533 
534 #if OMP_50_ENABLED
535 kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
536 #endif
537 // end of file //
sched_type
Definition: kmp.h:337