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_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 #if KMP_WEIGHTED_ITERATIONS_SUPPORTED
286 int __kmp_first_osid_with_ecore = -1;
287 #endif
288
289 #endif /* KMP_AFFINITY_SUPPORTED */
290
291 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
292 kmp_proc_bind_t __kmp_teams_proc_bind = proc_bind_spread;
293 int __kmp_affinity_num_places = 0;
294 int __kmp_display_affinity = FALSE;
295 char *__kmp_affinity_format = NULL;
296
297 kmp_int32 __kmp_default_device = 0;
298
299 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
300 kmp_int32 __kmp_max_task_priority = 0;
301 kmp_uint64 __kmp_taskloop_min_tasks = 0;
302
303 int __kmp_memkind_available = 0;
304 omp_allocator_handle_t const omp_null_allocator = NULL;
305 omp_allocator_handle_t const omp_default_mem_alloc =
306 (omp_allocator_handle_t const)1;
307 omp_allocator_handle_t const omp_large_cap_mem_alloc =
308 (omp_allocator_handle_t const)2;
309 omp_allocator_handle_t const omp_const_mem_alloc =
310 (omp_allocator_handle_t const)3;
311 omp_allocator_handle_t const omp_high_bw_mem_alloc =
312 (omp_allocator_handle_t const)4;
313 omp_allocator_handle_t const omp_low_lat_mem_alloc =
314 (omp_allocator_handle_t const)5;
315 omp_allocator_handle_t const omp_cgroup_mem_alloc =
316 (omp_allocator_handle_t const)6;
317 omp_allocator_handle_t const omp_pteam_mem_alloc =
318 (omp_allocator_handle_t const)7;
319 omp_allocator_handle_t const omp_thread_mem_alloc =
320 (omp_allocator_handle_t const)8;
321 omp_allocator_handle_t const llvm_omp_target_host_mem_alloc =
322 (omp_allocator_handle_t const)100;
323 omp_allocator_handle_t const llvm_omp_target_shared_mem_alloc =
324 (omp_allocator_handle_t const)101;
325 omp_allocator_handle_t const llvm_omp_target_device_mem_alloc =
326 (omp_allocator_handle_t const)102;
327 omp_allocator_handle_t const kmp_max_mem_alloc =
328 (omp_allocator_handle_t const)1024;
329 omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;
330
331 omp_memspace_handle_t const omp_default_mem_space =
332 (omp_memspace_handle_t const)0;
333 omp_memspace_handle_t const omp_large_cap_mem_space =
334 (omp_memspace_handle_t const)1;
335 omp_memspace_handle_t const omp_const_mem_space =
336 (omp_memspace_handle_t const)2;
337 omp_memspace_handle_t const omp_high_bw_mem_space =
338 (omp_memspace_handle_t const)3;
339 omp_memspace_handle_t const omp_low_lat_mem_space =
340 (omp_memspace_handle_t const)4;
341 omp_memspace_handle_t const llvm_omp_target_host_mem_space =
342 (omp_memspace_handle_t const)100;
343 omp_memspace_handle_t const llvm_omp_target_shared_mem_space =
344 (omp_memspace_handle_t const)101;
345 omp_memspace_handle_t const llvm_omp_target_device_mem_space =
346 (omp_memspace_handle_t const)102;
347
348 /* This check ensures that the compiler is passing the correct data type for the
349 flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
350 not a 4-byte type, then give an error message about a non-positive length
351 array pointing here. If that happens, the kmp_tasking_flags_t structure must
352 be redefined to have exactly 32 bits. */
353 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
354
355 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
356 int __kmp_enable_task_throttling = 1;
357
358 #ifdef DEBUG_SUSPEND
359 int __kmp_suspend_count = 0;
360 #endif
361
362 int __kmp_settings = FALSE;
363 int __kmp_duplicate_library_ok = 0;
364 #if USE_ITT_BUILD
365 int __kmp_forkjoin_frames = 1;
366 int __kmp_forkjoin_frames_mode = 3;
367 #endif
368 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
369 reduction_method_not_defined;
370 int __kmp_determ_red = FALSE;
371
372 #ifdef KMP_DEBUG
373 int kmp_a_debug = 0;
374 int kmp_b_debug = 0;
375 int kmp_c_debug = 0;
376 int kmp_d_debug = 0;
377 int kmp_e_debug = 0;
378 int kmp_f_debug = 0;
379 int kmp_diag = 0;
380 #endif
381
382 /* For debug information logging using rotating buffer */
383 int __kmp_debug_buf =
384 FALSE; /* TRUE means use buffer, FALSE means print to stderr */
385 int __kmp_debug_buf_lines =
386 KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
387 int __kmp_debug_buf_chars =
388 KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
389 int __kmp_debug_buf_atomic =
390 FALSE; /* TRUE means use atomic update of buffer entry pointer */
391
392 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
393 std::atomic<int> __kmp_debug_count =
394 0; /* number of lines printed in buffer so far */
395 int __kmp_debug_buf_warn_chars =
396 0; /* Keep track of char increase recommended in warnings */
397 /* end rotating debug buffer */
398
399 #ifdef KMP_DEBUG
400 int __kmp_par_range; /* +1 => only go par for constructs in range */
401 /* -1 => only go par for constructs outside range */
402 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
403 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
404 int __kmp_par_range_lb = 0;
405 int __kmp_par_range_ub = INT_MAX;
406 #endif /* KMP_DEBUG */
407
408 /* For printing out dynamic storage map for threads and teams */
409 int __kmp_storage_map =
410 FALSE; /* True means print storage map for threads and teams */
411 int __kmp_storage_map_verbose =
412 FALSE; /* True means storage map includes placement info */
413 int __kmp_storage_map_verbose_specified = FALSE;
414 /* Initialize the library data structures when we fork a child process, defaults
415 * to TRUE */
416 int __kmp_need_register_atfork =
417 TRUE; /* At initialization, call pthread_atfork to install fork handler */
418 int __kmp_need_register_atfork_specified = TRUE;
419
420 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
421 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
422 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
423 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
424
425 // From KMP_USE_YIELD:
426 // 0 = never yield;
427 // 1 = always yield (default);
428 // 2 = yield only if oversubscribed
429 #if KMP_OS_DARWIN && KMP_ARCH_AARCH64
430 // Set to 0 for environments where yield is slower
431 kmp_int32 __kmp_use_yield = 0;
432 #else
433 kmp_int32 __kmp_use_yield = 1;
434 #endif
435
436 // This will be 1 if KMP_USE_YIELD environment variable was set explicitly
437 kmp_int32 __kmp_use_yield_exp_set = 0;
438
439 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
440 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
441 kmp_uint64 __kmp_pause_init = 1; // for tpause
442
443 /* ------------------------------------------------------ */
444 /* STATE mostly syncronized with global lock */
445 /* data written to rarely by primary threads, read often by workers */
446 /* TODO: None of this global padding stuff works consistently because the order
447 of declaration is not necessarily correlated to storage order. To fix this,
448 all the important globals must be put in a big structure instead. */
449 KMP_ALIGN_CACHE
450 kmp_info_t **__kmp_threads = NULL;
451 kmp_root_t **__kmp_root = NULL;
452 kmp_old_threads_list_t *__kmp_old_threads_list = NULL;
453
454 /* data read/written to often by primary threads */
455 KMP_ALIGN_CACHE
456 volatile int __kmp_nth = 0;
457 volatile int __kmp_all_nth = 0;
458 volatile kmp_info_t *__kmp_thread_pool = NULL;
459 volatile kmp_team_t *__kmp_team_pool = NULL;
460
461 KMP_ALIGN_CACHE
462 std::atomic<int> __kmp_thread_pool_active_nth = 0;
463
464 /* -------------------------------------------------
465 * GLOBAL/ROOT STATE */
466 KMP_ALIGN_CACHE
467 kmp_global_t __kmp_global;
468
469 /* ----------------------------------------------- */
470 /* GLOBAL SYNCHRONIZATION LOCKS */
471 /* TODO verify the need for these locks and if they need to be global */
472
473 #if KMP_USE_INTERNODE_ALIGNMENT
474 /* Multinode systems have larger cache line granularity which can cause
475 * false sharing if the alignment is not large enough for these locks */
476 KMP_ALIGN_CACHE_INTERNODE
477
478 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
479 KMP_ALIGN_CACHE_INTERNODE
480 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
481 KMP_ALIGN_CACHE_INTERNODE
482 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
483 #if KMP_USE_MONITOR
484 /* control monitor thread creation */
485 KMP_ALIGN_CACHE_INTERNODE
486 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
487 #endif
488 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
489 to co-exist */
490 KMP_ALIGN_CACHE_INTERNODE
491 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
492
493 KMP_ALIGN_CACHE_INTERNODE
494 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
495 KMP_ALIGN_CACHE_INTERNODE
496 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
497 KMP_ALIGN_CACHE_INTERNODE
498 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
499 #else
500 KMP_ALIGN_CACHE
501
502 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
503 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
504 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
505 #if KMP_USE_MONITOR
506 /* control monitor thread creation */
507 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
508 #endif
509 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
510 to co-exist */
511 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
512
513 KMP_ALIGN(128)
514 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
515 KMP_ALIGN(128)
516 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
517 KMP_ALIGN(128)
518 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
519 #endif
520
521 /* ----------------------------------------------- */
522
523 #if KMP_HANDLE_SIGNALS
524 /* Signal handling is disabled by default, because it confuses users: In case of
525 sigsegv (or other trouble) in user code signal handler catches the signal,
526 which then "appears" in the monitor thread (when the monitor executes raise()
527 function). Users see signal in the monitor thread and blame OpenMP RTL.
528
529 Grant said signal handling required on some older OSes (Irix?) supported by
530 KAI, because bad applications hung but not aborted. Currently it is not a
531 problem for Linux* OS, OS X* and Windows* OS.
532
533 Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm
534 putting the default back for now to see if that fixes hangs on those
535 machines.
536
537 2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
538 stack backtrace when program is aborting, but the code is not signal-safe.
539 When multiple signals raised at the same time (which occurs in dynamic
540 negative tests because all the worker threads detects the same error),
541 Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
542 by Steve R., and will be available soon. */
543 int __kmp_handle_signals = FALSE;
544 #endif
545
546 #ifdef DEBUG_SUSPEND
get_suspend_count_(void)547 int get_suspend_count_(void) {
548 int count = __kmp_suspend_count;
549 __kmp_suspend_count = 0;
550 return count;
551 }
set_suspend_count_(int * value)552 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
553 #endif
554
555 kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
556
557 // OMP Pause Resources
558 kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
559
560 // Nesting mode
561 int __kmp_nesting_mode = 0;
562 int __kmp_nesting_mode_nlevels = 1;
563 int *__kmp_nesting_nth_level;
564
565 #if OMPX_TASKGRAPH
566 // TDG record & replay
567 int __kmp_tdg_dot = 0;
568 kmp_int32 __kmp_max_tdgs = 100;
569 kmp_tdg_info_t **__kmp_global_tdgs = NULL;
570 kmp_int32 __kmp_curr_tdg_idx =
571 0; // Id of the current TDG being recorded or executed
572 kmp_int32 __kmp_num_tdg = 0;
573 kmp_int32 __kmp_successors_size = 10; // Initial succesor size list for
574 // recording
575 std::atomic<kmp_int32> __kmp_tdg_task_id = 0;
576 #endif
577 // end of file //
578
579