-
Notifications
You must be signed in to change notification settings - Fork 1.5k
/
Copy pathblas_server.c
1167 lines (921 loc) · 32.8 KB
/
blas_server.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*****************************************************************************
Copyright (c) 2011-2014, The OpenBLAS Project
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. Neither the name of the OpenBLAS project nor the names of
its contributors may be used to endorse or promote products
derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**********************************************************************************/
/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin. */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* 1. Redistributions of source code must retain the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer. */
/* */
/* 2. Redistributions in binary form must reproduce the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer in the documentation and/or other materials */
/* provided with the distribution. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
/* AUSTIN ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, */
/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
/* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT */
/* AUSTIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */
/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE */
/* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR */
/* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */
/* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */
/* POSSIBILITY OF SUCH DAMAGE. */
/* */
/* The views and conclusions contained in the software and */
/* documentation are those of the authors and should not be */
/* interpreted as representing official policies, either expressed */
/* or implied, of The University of Texas at Austin. */
/*********************************************************************/
#include "common.h"
#if defined(OS_LINUX) || defined(OS_NETBSD) || defined(OS_DARWIN) || defined(OS_ANDROID) || defined(OS_SUNOS) || defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_DRAGONFLY) || defined(OS_HAIKU)
#include <dlfcn.h>
#include <errno.h>
#include <signal.h>
#include <sys/resource.h>
#include <sys/time.h>
#endif
#ifndef likely
#ifdef __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#else
#define likely(x) (x)
#endif
#endif
#ifndef unlikely
#ifdef __GNUC__
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define unlikely(x) (x)
#endif
#endif
extern unsigned int openblas_thread_timeout(void);
#ifdef SMP_SERVER
#undef MONITOR
#undef TIMING
#undef TIMING_DEBUG
#undef NEED_STACKATTR
#define ATTRIBUTE_SIZE 128
/* This is a thread server model implementation. The threads are */
/* spawned at first access to blas library, and still remains until */
/* destruction routine is called. The number of threads are */
/* equal to "OMP_NUM_THREADS - 1" and thread only wakes up when */
/* jobs is queued. */
/* We need this global for checking if initialization is finished. */
int blas_server_avail __attribute__((aligned(ATTRIBUTE_SIZE))) = 0;
int blas_omp_threads_local = 1;
static void * blas_thread_buffer[MAX_CPU_NUMBER];
/* Local Variables */
#if defined(USE_PTHREAD_LOCK)
static pthread_mutex_t server_lock = PTHREAD_MUTEX_INITIALIZER;
#elif defined(USE_PTHREAD_SPINLOCK)
static pthread_spinlock_t server_lock = 0;
#else
static unsigned long server_lock = 0;
#endif
#define THREAD_STATUS_SLEEP 2
#define THREAD_STATUS_WAKEUP 4
static pthread_t blas_threads [MAX_CPU_NUMBER];
typedef struct {
blas_queue_t * volatile queue __attribute__((aligned(ATTRIBUTE_SIZE)));
#if defined(OS_LINUX) && !defined(NO_AFFINITY)
int node;
#endif
volatile long status;
pthread_mutex_t lock;
pthread_cond_t wakeup;
} thread_status_t;
#ifdef HAVE_C11
#define atomic_load_queue(p) __atomic_load_n(p, __ATOMIC_ACQUIRE)
#define atomic_store_queue(p, v) __atomic_store_n(p, v, __ATOMIC_RELEASE)
#else
#define atomic_load_queue(p) (blas_queue_t*)(*(volatile blas_queue_t**)(p))
#define atomic_store_queue(p, v) (*(volatile blas_queue_t* volatile*)(p) = (v))
#endif
static thread_status_t thread_status[MAX_CPU_NUMBER] __attribute__((aligned(ATTRIBUTE_SIZE)));
#ifndef THREAD_TIMEOUT
#define THREAD_TIMEOUT 28
#endif
static unsigned int thread_timeout = (1U << (THREAD_TIMEOUT));
#ifdef MONITOR
/* Monitor is a function to see thread's status for every second. */
/* Usually it turns off and it's for debugging. */
static pthread_t monitor_thread;
static int main_status[MAX_CPU_NUMBER];
#define MAIN_ENTER 0x01
#define MAIN_EXIT 0x02
#define MAIN_TRYLOCK 0x03
#define MAIN_LOCKSUCCESS 0x04
#define MAIN_QUEUING 0x05
#define MAIN_RECEIVING 0x06
#define MAIN_RUNNING1 0x07
#define MAIN_RUNNING2 0x08
#define MAIN_RUNNING3 0x09
#define MAIN_WAITING 0x0a
#define MAIN_SLEEPING 0x0b
#define MAIN_FINISH 0x0c
#define MAIN_DONE 0x0d
#endif
#define BLAS_QUEUE_FINISHED 3
#define BLAS_QUEUE_RUNNING 4
#ifdef TIMING
BLASLONG exit_time[MAX_CPU_NUMBER];
#endif
//Prototypes
static void exec_threads(int , blas_queue_t *, int);
static void adjust_thread_buffers();
static void legacy_exec(void *func, int mode, blas_arg_t *args, void *sb){
if (!(mode & BLAS_COMPLEX)){
#ifdef EXPRECISION
if ((mode & BLAS_PREC) == BLAS_XDOUBLE){
/* REAL / Extended Double */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, xdouble,
xdouble *, BLASLONG, xdouble *, BLASLONG,
xdouble *, BLASLONG, void *) = func;
afunc(args -> m, args -> n, args -> k,
((xdouble *)args -> alpha)[0],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else
#endif
if ((mode & BLAS_PREC) == BLAS_DOUBLE){
/* REAL / Double */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, double,
double *, BLASLONG, double *, BLASLONG,
double *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, double, double *, BLASLONG,
double *, BLASLONG, double *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((double *)args -> alpha)[0],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else if ((mode & BLAS_PREC) == BLAS_SINGLE){
/* REAL / Single */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, float,
float *, BLASLONG, float *, BLASLONG,
float *, BLASLONG, void *) = (void (*)
(BLASLONG, BLASLONG, BLASLONG, float,
float *, BLASLONG, float *, BLASLONG,
float *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((float *)args -> alpha)[0],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
#ifdef BUILD_BFLOAT16
} else if ((mode & BLAS_PREC) == BLAS_BFLOAT16){
/* REAL / BFLOAT16 */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, bfloat16,
bfloat16 *, BLASLONG, bfloat16 *, BLASLONG,
bfloat16 *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, bfloat16,
bfloat16 *, BLASLONG, bfloat16 *, BLASLONG,
bfloat16 *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((bfloat16 *)args -> alpha)[0],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else if ((mode & BLAS_PREC) == BLAS_STOBF16){
/* REAL / BLAS_STOBF16 */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, float,
float *, BLASLONG, bfloat16 *, BLASLONG,
float *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, float,
float *, BLASLONG, bfloat16 *, BLASLONG,
float *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((float *)args -> alpha)[0],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else if ((mode & BLAS_PREC) == BLAS_DTOBF16){
/* REAL / BLAS_DTOBF16 */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, double,
double *, BLASLONG, bfloat16 *, BLASLONG,
double *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, double,
double *, BLASLONG, bfloat16 *, BLASLONG,
double *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((double *)args -> alpha)[0],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
#endif
} else {
/* REAL / Other types in future */
}
} else {
#ifdef EXPRECISION
if ((mode & BLAS_PREC) == BLAS_XDOUBLE){
/* COMPLEX / Extended Double */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, xdouble, xdouble,
xdouble *, BLASLONG, xdouble *, BLASLONG,
xdouble *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, xdouble, xdouble,
xdouble *, BLASLONG, xdouble *, BLASLONG,
xdouble *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((xdouble *)args -> alpha)[0],
((xdouble *)args -> alpha)[1],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else
#endif
if ((mode & BLAS_PREC) == BLAS_DOUBLE) {
/* COMPLEX / Double */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, double, double,
double *, BLASLONG, double *, BLASLONG,
double *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, double, double,
double *, BLASLONG, double *, BLASLONG,
double *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((double *)args -> alpha)[0],
((double *)args -> alpha)[1],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else if ((mode & BLAS_PREC) == BLAS_SINGLE) {
/* COMPLEX / Single */
void (*afunc)(BLASLONG, BLASLONG, BLASLONG, float, float,
float *, BLASLONG, float *, BLASLONG,
float *, BLASLONG, void *) = (void (*)(BLASLONG, BLASLONG, BLASLONG, float, float,
float *, BLASLONG, float *, BLASLONG,
float *, BLASLONG, void *)) func;
afunc(args -> m, args -> n, args -> k,
((float *)args -> alpha)[0],
((float *)args -> alpha)[1],
args -> a, args -> lda,
args -> b, args -> ldb,
args -> c, args -> ldc, sb);
} else {
/* COMPLEX / Other types in future */
}
}
}
#if defined(OS_LINUX) && !defined(NO_AFFINITY)
int gotoblas_set_affinity(int);
int gotoblas_set_affinity2(int);
int get_node(void);
#endif
static int increased_threads = 0;
#ifdef OS_LINUX
extern int openblas_get_num_threads(void);
int openblas_setaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set) {
const int active_threads = openblas_get_num_threads();
if (thread_idx < 0 || thread_idx >= active_threads) {
errno = EINVAL;
return -1;
}
pthread_t thread = (thread_idx == active_threads - 1)
? pthread_self()
: blas_threads[thread_idx];
return pthread_setaffinity_np(thread, cpusetsize, cpu_set);
}
int openblas_getaffinity(int thread_idx, size_t cpusetsize, cpu_set_t* cpu_set) {
const int active_threads = openblas_get_num_threads();
if (thread_idx < 0 || thread_idx >= active_threads) {
errno = EINVAL;
return -1;
}
pthread_t thread = (thread_idx == active_threads - 1)
? pthread_self()
: blas_threads[thread_idx];
return pthread_getaffinity_np(thread, cpusetsize, cpu_set);
}
#endif
static void* blas_thread_server(void *arg){
/* Thread identifier */
BLASLONG cpu = (BLASLONG)arg;
unsigned int last_tick;
blas_queue_t *queue;
blas_queue_t *tscq;
#ifdef TIMING_DEBUG
unsigned long start, stop;
#endif
#if defined(OS_LINUX) && !defined(NO_AFFINITY)
if (!increased_threads)
thread_status[cpu].node = gotoblas_set_affinity(cpu + 1);
else
thread_status[cpu].node = gotoblas_set_affinity(-1);
#endif
#ifdef MONITOR
main_status[cpu] = MAIN_ENTER;
#endif
#ifdef SMP_DEBUG
fprintf(STDERR, "Server[%2ld] Thread has just been spawned!\n", cpu);
#endif
while (1){
#ifdef MONITOR
main_status[cpu] = MAIN_QUEUING;
#endif
#ifdef TIMING
exit_time[cpu] = rpcc();
#endif
last_tick = (unsigned int)rpcc();
tscq = atomic_load_queue(&thread_status[cpu].queue);
while(!tscq || tscq == 0x1) {
YIELDING;
if ((unsigned int)rpcc() - last_tick > thread_timeout) {
if (!atomic_load_queue(&thread_status[cpu].queue)) {
pthread_mutex_lock (&thread_status[cpu].lock);
thread_status[cpu].status = THREAD_STATUS_SLEEP;
while (thread_status[cpu].status == THREAD_STATUS_SLEEP &&
!atomic_load_queue(&thread_status[cpu].queue)) {
#ifdef MONITOR
main_status[cpu] = MAIN_SLEEPING;
#endif
pthread_cond_wait(&thread_status[cpu].wakeup, &thread_status[cpu].lock);
}
pthread_mutex_unlock(&thread_status[cpu].lock);
}
last_tick = (unsigned int)rpcc();
}
tscq = atomic_load_queue(&thread_status[cpu].queue);
}
queue = atomic_load_queue(&thread_status[cpu].queue);
MB;
if ((long)queue == -1) break;
#ifdef MONITOR
main_status[cpu] = MAIN_RECEIVING;
#endif
#ifdef TIMING_DEBUG
start = rpcc();
#endif
if(queue) {
exec_threads(cpu, queue, 0);
}
#ifdef MONITOR
main_status[cpu] = MAIN_DONE;
#endif
#ifdef TIMING_DEBUG
stop = rpcc();
fprintf(STDERR, "Thread[%ld] : %16lu %16lu (%8lu cycles)\n", cpu + 1,
start, stop,
stop - start);
#endif
}
/* Shutdown procedure */
#ifdef SMP_DEBUG
fprintf(STDERR, "Server[%2ld] Shutdown!\n", cpu);
#endif
//pthread_exit(NULL);
return NULL;
}
#ifdef MONITOR
static BLASLONG num_suspend = 0;
static int blas_monitor(void *arg){
int i;
while(1){
for (i = 0; i < blas_num_threads - 1; i++){
switch (main_status[i]) {
case MAIN_ENTER :
fprintf(STDERR, "THREAD[%2d] : Entering.\n", i);
break;
case MAIN_EXIT :
fprintf(STDERR, "THREAD[%2d] : Exiting.\n", i);
break;
case MAIN_TRYLOCK :
fprintf(STDERR, "THREAD[%2d] : Trying lock operation.\n", i);
break;
case MAIN_QUEUING :
fprintf(STDERR, "THREAD[%2d] : Queuing.\n", i);
break;
case MAIN_RECEIVING :
fprintf(STDERR, "THREAD[%2d] : Receiving.\n", i);
break;
case MAIN_RUNNING1 :
fprintf(STDERR, "THREAD[%2d] : Running1.\n", i);
break;
case MAIN_RUNNING2 :
fprintf(STDERR, "THREAD[%2d] : Running2.\n", i);
break;
case MAIN_RUNNING3 :
fprintf(STDERR, "THREAD[%2d] : Running3.\n", i);
break;
case MAIN_WAITING :
fprintf(STDERR, "THREAD[%2d] : Waiting.\n", i);
break;
case MAIN_SLEEPING :
fprintf(STDERR, "THREAD[%2d] : Sleeping.\n", i);
break;
case MAIN_FINISH :
fprintf(STDERR, "THREAD[%2d] : Finishing.\n", i);
break;
case MAIN_DONE :
fprintf(STDERR, "THREAD[%2d] : Job is done.\n", i);
break;
}
fprintf(stderr, "Total number of suspended ... %ld\n", num_suspend);
}
sleep(1);
}
return 0;
}
#endif
/* Initializing routine */
int blas_thread_init(void){
BLASLONG i;
int ret;
int thread_timeout_env;
#ifdef NEED_STACKATTR
pthread_attr_t attr;
#endif
if (blas_server_avail) return 0;
#ifdef NEED_STACKATTR
pthread_attr_init(&attr);
pthread_attr_setguardsize(&attr, 0x1000U);
pthread_attr_setstacksize( &attr, 0x1000U);
#endif
LOCK_COMMAND(&server_lock);
// Adjust thread buffers
adjust_thread_buffers();
if (!blas_server_avail){
thread_timeout_env=openblas_thread_timeout();
if (thread_timeout_env>0) {
if (thread_timeout_env < 4) thread_timeout_env = 4;
if (thread_timeout_env > 30) thread_timeout_env = 30;
thread_timeout = (1 << thread_timeout_env);
}
for(i = 0; i < blas_num_threads - 1; i++){
atomic_store_queue(&thread_status[i].queue, (blas_queue_t *)0);
thread_status[i].status = THREAD_STATUS_WAKEUP;
pthread_mutex_init(&thread_status[i].lock, NULL);
pthread_cond_init (&thread_status[i].wakeup, NULL);
#ifdef NEED_STACKATTR
ret=pthread_create(&blas_threads[i], &attr,
&blas_thread_server, (void *)i);
#else
ret=pthread_create(&blas_threads[i], NULL,
&blas_thread_server, (void *)i);
#endif
if(ret!=0){
struct rlimit rlim;
const char *msg = strerror(ret);
fprintf(STDERR, "OpenBLAS blas_thread_init: pthread_create failed for thread %ld of %d: %s\n", i+1,blas_num_threads,msg);
fprintf(STDERR, "OpenBLAS blas_thread_init: ensure that your address space and process count limits are big enough (ulimit -a)\n");
fprintf(STDERR, "OpenBLAS blas_thread_init: or set a smaller OPENBLAS_NUM_THREADS to fit into what you have available\n");
#ifdef RLIMIT_NPROC
if(0 == getrlimit(RLIMIT_NPROC, &rlim)) {
fprintf(STDERR, "OpenBLAS blas_thread_init: RLIMIT_NPROC "
"%ld current, %ld max\n", (long)(rlim.rlim_cur), (long)(rlim.rlim_max));
}
#endif
if(0 != raise(SIGINT)) {
fprintf(STDERR, "OpenBLAS blas_thread_init: calling exit(3)\n");
exit(EXIT_FAILURE);
}
}
}
#ifdef MONITOR
pthread_create(&monitor_thread, NULL,
(void *)&blas_monitor, (void *)NULL);
#endif
blas_server_avail = 1;
}
UNLOCK_COMMAND(&server_lock);
return 0;
}
/*
User can call one of two routines.
exec_blas_async ... immediately returns after jobs are queued.
exec_blas ... returns after jobs are finished.
*/
static BLASULONG exec_queue_lock = 0;
int exec_blas_async(BLASLONG pos, blas_queue_t *queue){
#ifdef SMP_SERVER
// Handle lazy re-init of the thread-pool after a POSIX fork
LOCK_COMMAND(&server_lock);
if (unlikely(blas_server_avail == 0)) blas_thread_init();
UNLOCK_COMMAND(&server_lock);
#endif
BLASLONG i = 0;
blas_queue_t *current = queue;
blas_queue_t *tsiq,*tspq;
#if defined(OS_LINUX) && !defined(NO_AFFINITY) && !defined(PARAMTEST)
int node = get_node();
int nodes = get_num_nodes();
#endif
#ifdef SMP_DEBUG
int exec_count = 0;
fprintf(STDERR, "Exec_blas_async is called. Position = %d\n", pos);
#endif
blas_lock(&exec_queue_lock);
while (queue) {
queue -> position = pos;
#ifdef CONSISTENT_FPCSR
#ifdef __aarch64__
__asm__ __volatile__ ("mrs %0, fpcr" : "=r" (queue -> sse_mode));
#else
__asm__ __volatile__ ("fnstcw %0" : "=m" (queue -> x87_mode));
__asm__ __volatile__ ("stmxcsr %0" : "=m" (queue -> sse_mode));
#endif
#endif
#if defined(OS_LINUX) && !defined(NO_AFFINITY) && !defined(PARAMTEST)
/* Node Mapping Mode */
if (queue -> mode & BLAS_NODE) {
do {
while((thread_status[i].node != node || atomic_load_queue(&thread_status[i].queue)) && (i < blas_num_threads - 1)) i ++;
if (i < blas_num_threads - 1) break;
i ++;
if (i >= blas_num_threads - 1) {
i = 0;
node ++;
if (node >= nodes) node = 0;
}
} while (1);
} else {
tsiq = atomic_load_queue(&thread_status[i].queue);
while(tsiq) {
i ++;
if (i >= blas_num_threads - 1) i = 0;
tsiq = atomic_load_queue(&thread_status[i].queue);
}
}
#else
tsiq = atomic_load_queue(&thread_status[i].queue);
while(tsiq) {
i ++;
if (i >= blas_num_threads - 1) i = 0;
tsiq = atomic_load_queue(&thread_status[i].queue);
}
#endif
queue -> assigned = i;
MB;
atomic_store_queue(&thread_status[i].queue, queue);
queue = queue -> next;
pos ++;
#ifdef SMP_DEBUG
exec_count ++;
#endif
}
blas_unlock(&exec_queue_lock);
#ifdef SMP_DEBUG
fprintf(STDERR, "Done(Number of threads = %2ld).\n", exec_count);
#endif
while (current) {
pos = current -> assigned;
tspq = atomic_load_queue(&thread_status[pos].queue);
if ((BLASULONG)tspq > 1) {
pthread_mutex_lock (&thread_status[pos].lock);
if (thread_status[pos].status == THREAD_STATUS_SLEEP) {
#ifdef MONITOR
num_suspend ++;
#endif
if (thread_status[pos].status == THREAD_STATUS_SLEEP) {
thread_status[pos].status = THREAD_STATUS_WAKEUP;
pthread_cond_signal(&thread_status[pos].wakeup);
}
}
pthread_mutex_unlock(&thread_status[pos].lock);
}
current = current -> next;
}
return 0;
}
int exec_blas_async_wait(BLASLONG num, blas_queue_t *queue){
blas_queue_t * tsqq;
while ((num > 0) && queue) {
tsqq = atomic_load_queue(&thread_status[queue->assigned].queue);
while(tsqq) {
YIELDING;
tsqq = atomic_load_queue(&thread_status[queue->assigned].queue);
};
queue = queue -> next;
num --;
}
MB;
#ifdef SMP_DEBUG
fprintf(STDERR, "Done.\n\n");
#endif
return 0;
}
/* Execute Threads */
int exec_blas(BLASLONG num, blas_queue_t *queue){
#ifdef SMP_SERVER
// Handle lazy re-init of the thread-pool after a POSIX fork
if (unlikely(blas_server_avail == 0)) blas_thread_init();
#endif
int (*routine)(blas_arg_t *, void *, void *, double *, double *, BLASLONG);
#ifdef TIMING_DEBUG
BLASULONG start, stop;
#endif
if ((num <= 0) || (queue == NULL)) return 0;
#ifdef SMP_DEBUG
fprintf(STDERR, "Exec_blas is called. Number of executing threads : %ld\n", num);
#endif
//Redirect to caller's callback routine
if (openblas_threads_callback_) {
int buf_index = 0, i = 0;
#ifndef USE_SIMPLE_THREADED_LEVEL3
for (i = 0; i < num; i ++)
queue[i].position = i;
#endif
openblas_threads_callback_(1, (openblas_dojob_callback) exec_threads, num, sizeof(blas_queue_t), (void*) queue, buf_index);
return 0;
}
#ifdef __ELF__
if (omp_in_parallel && (num > 1)) {
if (omp_in_parallel() > 0) {
fprintf(stderr,
"OpenBLAS Warning : Detect OpenMP Loop and this application may hang. "
"Please rebuild the library with USE_OPENMP=1 option.\n");
}
}
#endif
if ((num > 1) && queue -> next) exec_blas_async(1, queue -> next);
#ifdef TIMING_DEBUG
start = rpcc();
fprintf(STDERR, "\n");
#endif
routine = (int (*)(blas_arg_t *, void *, void *, double *, double *, BLASLONG))queue -> routine;
if (queue -> mode & BLAS_LEGACY) {
legacy_exec(routine, queue -> mode, queue -> args, queue -> sb);
} else
if (queue -> mode & BLAS_PTHREAD) {
void (*pthreadcompat)(void *) = (void (*)(void*))queue -> routine;
(pthreadcompat)(queue -> args);
} else
(routine)(queue -> args, queue -> range_m, queue -> range_n,
queue -> sa, queue -> sb, 0);
#ifdef TIMING_DEBUG
stop = rpcc();
#endif
if ((num > 1) && queue -> next) {
exec_blas_async_wait(num - 1, queue -> next);
// arm: make sure results from other threads are visible
MB;
}
#ifdef TIMING_DEBUG
fprintf(STDERR, "Thread[0] : %16lu %16lu (%8lu cycles)\n",
start, stop,
stop - start);
#endif
return 0;
}
void goto_set_num_threads(int num_threads) {
long i;
#ifdef SMP_SERVER
// Handle lazy re-init of the thread-pool after a POSIX fork
if (unlikely(blas_server_avail == 0)) blas_thread_init();
#endif
if (num_threads < 1) num_threads = blas_num_threads;
#ifndef NO_AFFINITY
if (num_threads == 1) {
if (blas_cpu_number == 1){
//OpenBLAS is already single thread.
return;
}else{
//From multi-threads to single thread
//Restore the original affinity mask
gotoblas_set_affinity(-1);
}
}
#endif
if (num_threads > MAX_CPU_NUMBER) num_threads = MAX_CPU_NUMBER;
if (num_threads > blas_num_threads) {
LOCK_COMMAND(&server_lock);
increased_threads = 1;
for(i = (blas_num_threads > 0) ? blas_num_threads - 1 : 0; i < num_threads - 1; i++){
atomic_store_queue(&thread_status[i].queue, (blas_queue_t *)0);
thread_status[i].status = THREAD_STATUS_WAKEUP;
pthread_mutex_init(&thread_status[i].lock, NULL);
pthread_cond_init (&thread_status[i].wakeup, NULL);
#ifdef NEED_STACKATTR
pthread_create(&blas_threads[i], &attr,
&blas_thread_server, (void *)i);
#else
pthread_create(&blas_threads[i], NULL,
&blas_thread_server, (void *)i);
#endif
}
blas_num_threads = num_threads;
UNLOCK_COMMAND(&server_lock);
}
#ifndef NO_AFFINITY
if(blas_cpu_number == 1 && num_threads > 1){
//Restore the thread 0 affinity.
gotoblas_set_affinity(0);
}
#endif
blas_cpu_number = num_threads;
#if defined(ARCH_MIPS64) || defined(ARCH_LOONGARCH64)
#ifndef DYNAMIC_ARCH
//set parameters for different number of threads.
blas_set_parameter();
#endif
#endif
}
void openblas_set_num_threads(int num_threads) {
goto_set_num_threads(num_threads);
}
/* Compatible function with pthread_create / join */
int gotoblas_pthread(int numthreads, void *function, void *args, int stride) {
blas_queue_t queue[MAX_CPU_NUMBER];
int i;
if (numthreads <= 0) return 0;
#ifdef SMP
if (blas_cpu_number == 0) blas_get_cpu_number();
#ifdef SMP_SERVER
if (blas_server_avail == 0) blas_thread_init();
#endif
#endif
for (i = 0; i < numthreads; i ++) {
queue[i].mode = BLAS_PTHREAD;
queue[i].routine = function;
queue[i].args = args;
queue[i].range_m = NULL;
queue[i].range_n = NULL;
queue[i].sa = args;
queue[i].sb = args;
queue[i].next = &queue[i + 1];
args += stride;
}
queue[numthreads - 1].next = NULL;
exec_blas(numthreads, queue);
return 0;
}
/* Shutdown procedure, but user don't have to call this routine. The */
/* kernel automatically kill threads. */
int BLASFUNC(blas_thread_shutdown)(void){
int i;
LOCK_COMMAND(&server_lock);
//Free buffers allocated for threads
for(i=0; i<MAX_CPU_NUMBER; i++){
if(blas_thread_buffer[i]!=NULL){
blas_memory_free(blas_thread_buffer[i]);
blas_thread_buffer[i]=NULL;
}
}
if (blas_server_avail) {
for (i = 0; i < blas_num_threads - 1; i++) {