LLVM OpenMP* Runtime Library
kmp_global.cpp
1 /*
2  * kmp_global.cpp -- KPTS global variables for runtime support library
3  */
4 
5 
6 //===----------------------------------------------------------------------===//
7 //
8 // The LLVM Compiler Infrastructure
9 //
10 // This file is dual licensed under the MIT and the University of Illinois Open
11 // Source Licenses. See LICENSE.txt for details.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 
16 #include "kmp.h"
17 #include "kmp_affinity.h"
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 accumulates all stats produced before __kmp_create_worker is called.
31 kmp_stats_list* __kmp_stats_list;
32 
33 // thread local pointer to stats node within list
34 __thread kmp_stats_list* __kmp_stats_thread_ptr = NULL;
35 
36 // gives reference tick for all events (considered the 0 tick)
37 tsc_tick_count __kmp_stats_start_time;
38 #endif
39 
40 /* ----------------------------------------------------- */
41 /* INITIALIZATION VARIABLES */
42 /* they are syncronized to write during init, but read anytime */
43 volatile int __kmp_init_serial = FALSE;
44 volatile int __kmp_init_gtid = FALSE;
45 volatile int __kmp_init_common = FALSE;
46 volatile int __kmp_init_middle = FALSE;
47 volatile int __kmp_init_parallel = FALSE;
48 #if KMP_USE_MONITOR
49 volatile int __kmp_init_monitor = 0; /* 1 - launched, 2 - actually started (Windows* OS only) */
50 #endif
51 volatile int __kmp_init_user_locks = FALSE;
52 
53 /* list of address of allocated caches for commons */
54 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;
55 
56 int __kmp_init_counter = 0;
57 int __kmp_root_counter = 0;
58 int __kmp_version = 0;
59 
60 volatile kmp_uint32 __kmp_team_counter = 0;
61 volatile kmp_uint32 __kmp_task_counter = 0;
62 
63 unsigned int __kmp_init_wait = KMP_DEFAULT_INIT_WAIT; /* initial number of spin-tests */
64 unsigned int __kmp_next_wait = KMP_DEFAULT_NEXT_WAIT; /* susequent number of spin-tests */
65 
66 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
67 #if KMP_USE_MONITOR
68 size_t __kmp_monitor_stksize = 0; // auto adjust
69 #endif
70 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;
71 int __kmp_stkpadding = KMP_MIN_STKPADDING;
72 
73 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR;
74 
75 /* Barrier method defaults, settings, and strings */
76 /* branch factor = 2^branch_bits (only relevant for tree and hyper barrier types) */
77 #if KMP_ARCH_X86_64
78 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; /* branch_factor = 4 */ /* hyper2: C78980 */
79 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; /* branch_factor = 4 */ /* hyper2: C78980 */
80 #else
81 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; /* branch_factor = 4 */ /* communication in core for MIC */
82 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; /* branch_factor = 4 */ /* communication in core for MIC */
83 #endif // KMP_ARCH_X86_64
84 #if KMP_ARCH_X86_64
85 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */
86 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */
87 #else
88 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_linear_bar;
89 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_linear_bar;
90 #endif
91 kmp_uint32 __kmp_barrier_gather_branch_bits [ bs_last_barrier ] = { 0 };
92 kmp_uint32 __kmp_barrier_release_branch_bits [ bs_last_barrier ] = { 0 };
93 kmp_bar_pat_e __kmp_barrier_gather_pattern [ bs_last_barrier ] = { bp_linear_bar };
94 kmp_bar_pat_e __kmp_barrier_release_pattern [ bs_last_barrier ] = { bp_linear_bar };
95 char const *__kmp_barrier_branch_bit_env_name [ bs_last_barrier ] =
96  { "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"
97  #if KMP_FAST_REDUCTION_BARRIER
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  , "KMP_REDUCTION_BARRIER_PATTERN"
105  #endif // KMP_FAST_REDUCTION_BARRIER
106  };
107 char const *__kmp_barrier_type_name [ bs_last_barrier ] =
108  { "plain", "forkjoin"
109  #if KMP_FAST_REDUCTION_BARRIER
110  , "reduction"
111  #endif // KMP_FAST_REDUCTION_BARRIER
112  };
113 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear","tree","hyper","hierarchical"};
114 
115 int __kmp_allThreadsSpecified = 0;
116 size_t __kmp_align_alloc = CACHE_LINE;
117 
118 
119 int __kmp_generate_warnings = kmp_warnings_low;
120 int __kmp_reserve_warn = 0;
121 int __kmp_xproc = 0;
122 int __kmp_avail_proc = 0;
123 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;
124 int __kmp_sys_max_nth = KMP_MAX_NTH;
125 int __kmp_max_nth = 0;
126 int __kmp_threads_capacity = 0;
127 int __kmp_dflt_team_nth = 0;
128 int __kmp_dflt_team_nth_ub = 0;
129 int __kmp_tp_capacity = 0;
130 int __kmp_tp_cached = 0;
131 int __kmp_dflt_nested = FALSE;
132 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;
133 int __kmp_dflt_max_active_levels = KMP_MAX_ACTIVE_LEVELS_LIMIT; /* max_active_levels limit */
134 #if KMP_NESTED_HOT_TEAMS
135 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */
136  /* 1 - keep extra threads when reduced */
137 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */
138 #endif
139 enum library_type __kmp_library = library_none;
140 enum sched_type __kmp_sched = kmp_sch_default; /* scheduling method for runtime scheduling */
141 enum sched_type __kmp_static = kmp_sch_static_greedy; /* default static scheduling method */
142 enum sched_type __kmp_guided = kmp_sch_guided_iterative_chunked; /* default guided scheduling method */
143 enum sched_type __kmp_auto = kmp_sch_guided_analytical_chunked; /* default auto scheduling method */
144 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME;
145 #if KMP_USE_MONITOR
146 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;
147 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME( KMP_DEFAULT_BLOCKTIME, KMP_MIN_MONITOR_WAKEUPS );
148 #endif
149 #ifdef KMP_ADJUST_BLOCKTIME
150 int __kmp_zero_bt = FALSE;
151 #endif /* KMP_ADJUST_BLOCKTIME */
152 #ifdef KMP_DFLT_NTH_CORES
153 int __kmp_ncores = 0;
154 #endif
155 int __kmp_chunk = 0;
156 int __kmp_abort_delay = 0;
157 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID)
158 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */
159 int __kmp_adjust_gtid_mode = FALSE;
160 #elif KMP_OS_WINDOWS
161 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */
162 int __kmp_adjust_gtid_mode = FALSE;
163 #else
164 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */
165 int __kmp_adjust_gtid_mode = TRUE;
166 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */
167 #ifdef KMP_TDATA_GTID
168 #if KMP_OS_WINDOWS
169 __declspec(thread) int __kmp_gtid = KMP_GTID_DNE;
170 #else
171 __thread int __kmp_gtid = KMP_GTID_DNE;
172 #endif /* KMP_OS_WINDOWS - workaround because Intel(R) Many Integrated Core compiler 20110316 doesn't accept __declspec */
173 #endif /* KMP_TDATA_GTID */
174 int __kmp_tls_gtid_min = INT_MAX;
175 int __kmp_foreign_tp = TRUE;
176 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
177 int __kmp_inherit_fp_control = TRUE;
178 kmp_int16 __kmp_init_x87_fpu_control_word = 0;
179 kmp_uint32 __kmp_init_mxcsr = 0;
180 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
181 
182 #ifdef USE_LOAD_BALANCE
183 double __kmp_load_balance_interval = 1.0;
184 #endif /* USE_LOAD_BALANCE */
185 
186 kmp_nested_nthreads_t __kmp_nested_nth = { NULL, 0, 0 };
187 
188 #if KMP_USE_ADAPTIVE_LOCKS
189 
190 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = { 1, 1024 }; // TODO: tune it!
191 
192 #if KMP_DEBUG_ADAPTIVE_LOCKS
193 char * __kmp_speculative_statsfile = "-";
194 #endif
195 
196 #endif // KMP_USE_ADAPTIVE_LOCKS
197 
198 #if OMP_40_ENABLED
199 int __kmp_display_env = FALSE;
200 int __kmp_display_env_verbose = FALSE;
201 int __kmp_omp_cancellation = FALSE;
202 #endif
203 
204 /* map OMP 3.0 schedule types with our internal schedule types */
205 enum sched_type __kmp_sch_map[ kmp_sched_upper - kmp_sched_lower_ext + kmp_sched_upper_std - kmp_sched_lower - 2 ] = {
206  kmp_sch_static_chunked, // ==> kmp_sched_static = 1
207  kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2
208  kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3
209  kmp_sch_auto, // ==> kmp_sched_auto = 4
210  kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101
211  // will likely not used, introduced here just to debug the code
212  // of public intel extension schedules
213 };
214 
215 #if KMP_OS_LINUX
216 enum clock_function_type __kmp_clock_function;
217 int __kmp_clock_function_param;
218 #endif /* KMP_OS_LINUX */
219 
220 #if KMP_ARCH_X86_64 && (KMP_OS_LINUX || KMP_OS_WINDOWS)
221 enum mic_type __kmp_mic_type = non_mic;
222 #endif
223 
224 #if KMP_AFFINITY_SUPPORTED
225 
226 KMPAffinity* __kmp_affinity_dispatch = NULL;
227 
228 # if KMP_USE_HWLOC
229 int __kmp_hwloc_error = FALSE;
230 hwloc_topology_t __kmp_hwloc_topology = NULL;
231 # endif
232 
233 # if KMP_OS_WINDOWS
234 # if KMP_GROUP_AFFINITY
235 int __kmp_num_proc_groups = 1;
236 # endif /* KMP_GROUP_AFFINITY */
237 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
238 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
239 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
240 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
241 # endif /* KMP_OS_WINDOWS */
242 
243 size_t __kmp_affin_mask_size = 0;
244 enum affinity_type __kmp_affinity_type = affinity_default;
245 enum affinity_gran __kmp_affinity_gran = affinity_gran_default;
246 int __kmp_affinity_gran_levels = -1;
247 int __kmp_affinity_dups = TRUE;
248 enum affinity_top_method __kmp_affinity_top_method = affinity_top_method_default;
249 int __kmp_affinity_compact = 0;
250 int __kmp_affinity_offset = 0;
251 int __kmp_affinity_verbose = FALSE;
252 int __kmp_affinity_warnings = TRUE;
253 int __kmp_affinity_respect_mask = affinity_respect_mask_default;
254 char * __kmp_affinity_proclist = NULL;
255 kmp_affin_mask_t *__kmp_affinity_masks = NULL;
256 unsigned __kmp_affinity_num_masks = 0;
257 
258 char const * __kmp_cpuinfo_file = NULL;
259 
260 #endif /* KMP_AFFINITY_SUPPORTED */
261 
262 #if OMP_40_ENABLED
263 kmp_nested_proc_bind_t __kmp_nested_proc_bind = { NULL, 0, 0 };
264 int __kmp_affinity_num_places = 0;
265 #endif
266 
267 int __kmp_place_num_sockets = 0;
268 int __kmp_place_socket_offset = 0;
269 int __kmp_place_num_cores = 0;
270 int __kmp_place_core_offset = 0;
271 int __kmp_place_num_threads_per_core = 0;
272 
273 #if OMP_40_ENABLED
274 kmp_int32 __kmp_default_device = 0;
275 #endif
276 
277 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
278 #if OMP_45_ENABLED
279 kmp_int32 __kmp_max_task_priority = 0;
280 #endif
281 
282 /* This check ensures that the compiler is passing the correct data type
283  * for the flags formal parameter of the function kmpc_omp_task_alloc().
284  * If the type is not a 4-byte type, then give an error message about
285  * a non-positive length array pointing here. If that happens, the
286  * kmp_tasking_flags_t structure must be redefined to have exactly 32 bits.
287  */
288 KMP_BUILD_ASSERT( sizeof(kmp_tasking_flags_t) == 4 );
289 
290 kmp_int32 __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
291 
292 #ifdef DEBUG_SUSPEND
293 int __kmp_suspend_count = 0;
294 #endif
295 
296 int __kmp_settings = FALSE;
297 int __kmp_duplicate_library_ok = 0;
298 #if USE_ITT_BUILD
299 int __kmp_forkjoin_frames = 1;
300 int __kmp_forkjoin_frames_mode = 3;
301 #endif
302 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method = reduction_method_not_defined;
303 int __kmp_determ_red = FALSE;
304 
305 #ifdef KMP_DEBUG
306 int kmp_a_debug = 0;
307 int kmp_b_debug = 0;
308 int kmp_c_debug = 0;
309 int kmp_d_debug = 0;
310 int kmp_e_debug = 0;
311 int kmp_f_debug = 0;
312 int kmp_diag = 0;
313 #endif
314 
315 /* For debug information logging using rotating buffer */
316 int __kmp_debug_buf = FALSE; /* TRUE means use buffer, FALSE means print to stderr */
317 int __kmp_debug_buf_lines = KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
318 int __kmp_debug_buf_chars = KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
319 int __kmp_debug_buf_atomic = FALSE; /* TRUE means use atomic update of buffer entry pointer */
320 
321 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
322 int __kmp_debug_count = 0; /* Counter for number of lines printed in buffer so far */
323 int __kmp_debug_buf_warn_chars = 0; /* Keep track of char increase recommended in warnings */
324 /* end rotating debug buffer */
325 
326 #ifdef KMP_DEBUG
327 int __kmp_par_range; /* +1 => only go par for constructs in range */
328  /* -1 => only go par for constructs outside range */
329 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = { '\0' };
330 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = { '\0' };
331 int __kmp_par_range_lb = 0;
332 int __kmp_par_range_ub = INT_MAX;
333 #endif /* KMP_DEBUG */
334 
335 /* For printing out dynamic storage map for threads and teams */
336 int __kmp_storage_map = FALSE; /* True means print storage map for threads and teams */
337 int __kmp_storage_map_verbose = FALSE; /* True means storage map includes placement info */
338 int __kmp_storage_map_verbose_specified = FALSE;
339 /* Initialize the library data structures when we fork a child process, defaults to TRUE */
340 int __kmp_need_register_atfork = TRUE; /* At initialization, call pthread_atfork to install fork handler */
341 int __kmp_need_register_atfork_specified = TRUE;
342 
343 int __kmp_env_chunk = FALSE; /* KMP_CHUNK specified? */
344 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
345 int __kmp_env_omp_stksize = FALSE; /* OMP_STACKSIZE specified? */
346 int __kmp_env_all_threads = FALSE;/* KMP_ALL_THREADS or KMP_MAX_THREADS specified? */
347 int __kmp_env_omp_all_threads = FALSE;/* OMP_THREAD_LIMIT specified? */
348 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
349 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
350 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
351 
352 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
353 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
354 
355 #if KMP_USE_MONITOR
356 kmp_uint32 __kmp_yielding_on = 1;
357 #if KMP_OS_CNK
358 kmp_uint32 __kmp_yield_cycle = 0;
359 #else
360 kmp_uint32 __kmp_yield_cycle = 1; /* Yield-cycle is on by default */
361 #endif
362 kmp_int32 __kmp_yield_on_count = 10; /* By default, yielding is on for 10 monitor periods. */
363 kmp_int32 __kmp_yield_off_count = 1; /* By default, yielding is off for 1 monitor periods. */
364 #endif
365 /* ----------------------------------------------------- */
366 
367 
368 /* ------------------------------------------------------ */
369 /* STATE mostly syncronized with global lock */
370 /* data written to rarely by masters, read often by workers */
371 /*
372  * SHALL WE EDIT THE COMMENT BELOW IN SOME WAY?
373  * TODO: None of this global padding stuff works consistently because
374  * the order of declaration is not necessarily correlated to storage order.
375  * To fix this, all the important globals must be put in a big structure
376  * instead.
377  */
378 KMP_ALIGN_CACHE
379  kmp_info_t **__kmp_threads = NULL;
380  kmp_root_t **__kmp_root = NULL;
381 
382 /* data read/written to often by masters */
383 KMP_ALIGN_CACHE
384 volatile int __kmp_nth = 0;
385 volatile int __kmp_all_nth = 0;
386 int __kmp_thread_pool_nth = 0;
387 volatile kmp_info_t *__kmp_thread_pool = NULL;
388 volatile kmp_team_t *__kmp_team_pool = NULL;
389 
390 KMP_ALIGN_CACHE
391 volatile int __kmp_thread_pool_active_nth = 0;
392 
393 /* -------------------------------------------------
394  * GLOBAL/ROOT STATE */
395 KMP_ALIGN_CACHE
396 kmp_global_t __kmp_global = {{ 0 }};
397 
398 /* ----------------------------------------------- */
399 /* GLOBAL SYNCHRONIZATION LOCKS */
400 /* TODO verify the need for these locks and if they need to be global */
401 
402 #if KMP_USE_INTERNODE_ALIGNMENT
403 /* Multinode systems have larger cache line granularity which can cause
404  * false sharing if the alignment is not large enough for these locks */
405 KMP_ALIGN_CACHE_INTERNODE
406 
407 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( __kmp_initz_lock ); /* Control initializations */
408 KMP_ALIGN_CACHE_INTERNODE
409 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */
410 KMP_ALIGN_CACHE_INTERNODE
411 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */
412 #if KMP_USE_MONITOR
413 KMP_ALIGN_CACHE_INTERNODE
414 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */
415 #endif
416 KMP_ALIGN_CACHE_INTERNODE
417 kmp_bootstrap_lock_t __kmp_tp_cached_lock; /* used for the hack to allow threadprivate cache and __kmp_threads expansion to co-exist */
418 
419 KMP_ALIGN_CACHE_INTERNODE
420 kmp_lock_t __kmp_global_lock; /* Control OS/global access */
421 KMP_ALIGN_CACHE_INTERNODE
422 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
423 KMP_ALIGN_CACHE_INTERNODE
424 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */
425 #else
426 KMP_ALIGN_CACHE
427 
428 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( __kmp_initz_lock ); /* Control initializations */
429 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */
430 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */
431 #if KMP_USE_MONITOR
432 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */
433 #endif
434 kmp_bootstrap_lock_t __kmp_tp_cached_lock; /* used for the hack to allow threadprivate cache and __kmp_threads expansion to co-exist */
435 
436 KMP_ALIGN(128)
437 kmp_lock_t __kmp_global_lock; /* Control OS/global access */
438 KMP_ALIGN(128)
439 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
440 KMP_ALIGN(128)
441 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */
442 #endif
443 
444 /* ----------------------------------------------- */
445 
446 #if KMP_HANDLE_SIGNALS
447  /*
448  Signal handling is disabled by default, because it confuses users: In case of sigsegv
449  (or other trouble) in user code signal handler catches the signal, which then "appears" in
450  the monitor thread (when the monitor executes raise() function). Users see signal in the
451  monitor thread and blame OpenMP RTL.
452 
453  Grant said signal handling required on some older OSes (Irix?) supported by KAI, because
454  bad applications hung but not aborted. Currently it is not a problem for Linux* OS, OS X* and
455  Windows* OS.
456 
457  Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm putting
458  the default back for now to see if that fixes hangs on those machines.
459 
460  2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of stack backtrace
461  when program is aborting, but the code is not signal-safe. When multiple signals raised at
462  the same time (which occurs in dynamic negative tests because all the worker threads detects
463  the same error), Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
464  by Steve R., and will be available soon.
465  */
466  int __kmp_handle_signals = FALSE;
467 #endif
468 
469 /* ----------------------------------------------- */
470 #ifdef BUILD_TV
471 kmp_key_t __kmp_tv_key = 0;
472 #endif
473 
474 /* ------------------------------------------------------------------------ */
475 /* ------------------------------------------------------------------------ */
476 
477 #ifdef DEBUG_SUSPEND
478 int
479 get_suspend_count_( void ) {
480  int count = __kmp_suspend_count;
481  __kmp_suspend_count = 0;
482  return count;
483 }
484 void
485 set_suspend_count_( int * value ) {
486  __kmp_suspend_count = *value;
487 }
488 #endif
489 
490 // Symbols for MS mutual detection.
491 int _You_must_link_with_exactly_one_OpenMP_library = 1;
492 int _You_must_link_with_Intel_OpenMP_library = 1;
493 #if KMP_OS_WINDOWS && ( KMP_VERSION_MAJOR > 4 )
494  int _You_must_link_with_Microsoft_OpenMP_library = 1;
495 #endif
496 
497 // end of file //
sched_type
Definition: kmp.h:303