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pml_csum_sendreq.h
1 /*
2 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
3 * University Research and Technology
4 * Corporation. All rights reserved.
5 * Copyright (c) 2004-2010 The University of Tennessee and The University
6 * of Tennessee Research Foundation. All rights
7 * reserved.
8 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
9 * University of Stuttgart. All rights reserved.
10 * Copyright (c) 2004-2005 The Regents of the University of California.
11 * All rights reserved.
12 * Copyright (c) 2009 IBM Corporation. All rights reserved.
13 * Copyright (c) 2009 Los Alamos National Security, LLC. All rights
14 * reserved.
15 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
16 * $COPYRIGHT$
17 *
18 * Additional copyrights may follow
19 *
20 * $HEADER$
21 */
22
23 #ifndef OMPI_PML_CSUM_SEND_REQUEST_H
24 #define OMPI_PML_CSUM_SEND_REQUEST_H
25
26 #include "ompi/mca/btl/btl.h"
27 #include "ompi/mca/pml/base/pml_base_sendreq.h"
28 #include "ompi/mca/mpool/base/base.h"
29 #include "pml_csum_comm.h"
30 #include "pml_csum_hdr.h"
31 #include "pml_csum_rdma.h"
32 #include "pml_csum_rdmafrag.h"
33 #include "opal/datatype/opal_convertor.h"
34 #include "ompi/mca/bml/bml.h"
35
36 BEGIN_C_DECLS
37
38 typedef enum {
39 MCA_PML_CSUM_SEND_PENDING_NONE,
40 MCA_PML_CSUM_SEND_PENDING_SCHEDULE,
41 MCA_PML_CSUM_SEND_PENDING_START
42 } mca_pml_csum_send_pending_t;
43
44 struct mca_pml_csum_send_request_t {
45 mca_pml_base_send_request_t req_send;
46 mca_bml_base_endpoint_t* req_endpoint;
47 ompi_ptr_t req_recv;
48 int32_t req_state;
49 int32_t req_lock;
50 bool req_throttle_sends;
51 size_t req_pipeline_depth;
52 size_t req_bytes_delivered;
53 uint32_t req_rdma_cnt;
54 mca_pml_csum_send_pending_t req_pending;
55 opal_mutex_t req_send_range_lock;
56 opal_list_t req_send_ranges;
57 mca_pml_csum_com_btl_t req_rdma[1];
58 };
59 typedef struct mca_pml_csum_send_request_t mca_pml_csum_send_request_t;
60
61 OBJ_CLASS_DECLARATION(mca_pml_csum_send_request_t);
62
63 struct mca_pml_csum_send_range_t {
64 ompi_free_list_item_t base;
65 uint64_t range_send_offset;
66 uint64_t range_send_length;
67 int range_btl_idx;
68 int range_btl_cnt;
69 mca_pml_csum_com_btl_t range_btls[1];
70 };
71 typedef struct mca_pml_csum_send_range_t mca_pml_csum_send_range_t;
72 OBJ_CLASS_DECLARATION(mca_pml_csum_send_range_t);
73
74 static inline bool lock_send_request(mca_pml_csum_send_request_t *sendreq)
75 {
76 return OPAL_THREAD_ADD32(&sendreq->req_lock, 1) == 1;
77 }
78
79 static inline bool unlock_send_request(mca_pml_csum_send_request_t *sendreq)
80 {
81 return OPAL_THREAD_ADD32(&sendreq->req_lock, -1) == 0;
82 }
83
84 static inline void
85 add_request_to_send_pending(mca_pml_csum_send_request_t* sendreq,
86 const mca_pml_csum_send_pending_t type,
87 const bool append)
88 {
89 opal_list_item_t *item = (opal_list_item_t*)sendreq;
90
91 OPAL_THREAD_LOCK(&mca_pml_csum.lock);
92 sendreq->req_pending = type;
93 if(append)
94 opal_list_append(&mca_pml_csum.send_pending, item);
95 else
96 opal_list_prepend(&mca_pml_csum.send_pending, item);
97
98 OPAL_THREAD_UNLOCK(&mca_pml_csum.lock);
99 }
100
101 static inline mca_pml_csum_send_request_t*
102 get_request_from_send_pending(mca_pml_csum_send_pending_t *type)
103 {
104 mca_pml_csum_send_request_t *sendreq;
105
106 OPAL_THREAD_LOCK(&mca_pml_csum.lock);
107 sendreq = (mca_pml_csum_send_request_t*)
108 opal_list_remove_first(&mca_pml_csum.send_pending);
109 if(sendreq) {
110 *type = sendreq->req_pending;
111 sendreq->req_pending = MCA_PML_CSUM_SEND_PENDING_NONE;
112 }
113 OPAL_THREAD_UNLOCK(&mca_pml_csum.lock);
114
115 return sendreq;
116 }
117
118 #define MCA_PML_CSUM_SEND_REQUEST_ALLOC( comm, \
119 dst, \
120 sendreq, \
121 rc) \
122 { \
123 ompi_proc_t *proc = ompi_comm_peer_lookup( comm, dst ); \
124 ompi_free_list_item_t* item; \
125 \
126 rc = OMPI_ERR_OUT_OF_RESOURCE; \
127 if( OPAL_LIKELY(NULL != proc) ) { \
128 rc = OMPI_SUCCESS; \
129 OMPI_FREE_LIST_WAIT(&mca_pml_base_send_requests, item, rc); \
130 sendreq = (mca_pml_csum_send_request_t*)item; \
131 sendreq->req_send.req_base.req_proc = proc; \
132 } \
133 }
134
135
136 #define MCA_PML_CSUM_SEND_REQUEST_INIT(sendreq, \
137 buf, \
138 count, \
139 datatype, \
140 dst, \
141 tag, \
142 comm, \
143 sendmode, \
144 persistent) \
145 { \
146 MCA_PML_BASE_SEND_REQUEST_INIT(&sendreq->req_send, \
147 buf, \
148 count, \
149 datatype, \
150 dst, \
151 tag, \
152 comm, \
153 sendmode, \
154 persistent, \
155 0); /* convertor_flags */ \
156 (sendreq)->req_recv.pval = NULL; \
157 }
158
159
160 static inline void mca_pml_csum_free_rdma_resources(mca_pml_csum_send_request_t* sendreq)
161 {
162 size_t r;
163
164 /* return mpool resources */
165 for(r = 0; r < sendreq->req_rdma_cnt; r++) {
166 mca_mpool_base_registration_t* reg = sendreq->req_rdma[r].btl_reg;
167 if( NULL != reg && reg->mpool != NULL ) {
168 reg->mpool->mpool_deregister(reg->mpool, reg);
169 }
170 }
171 sendreq->req_rdma_cnt = 0;
172 }
173
174
175 /**
176 * Start a send request.
177 */
178
179 #define MCA_PML_CSUM_SEND_REQUEST_START(sendreq, rc) \
180 do { \
181 rc = mca_pml_csum_send_request_start(sendreq); \
182 } while (0)
183
184
185 /*
186 * Mark a send request as completed at the MPI level.
187 */
188
189 #define MCA_PML_CSUM_SEND_REQUEST_MPI_COMPLETE(sendreq, with_signal) \
190 do { \
191 (sendreq)->req_send.req_base.req_ompi.req_status.MPI_SOURCE = \
192 (sendreq)->req_send.req_base.req_comm->c_my_rank; \
193 (sendreq)->req_send.req_base.req_ompi.req_status.MPI_TAG = \
194 (sendreq)->req_send.req_base.req_tag; \
195 (sendreq)->req_send.req_base.req_ompi.req_status.MPI_ERROR = OMPI_SUCCESS; \
196 (sendreq)->req_send.req_base.req_ompi.req_status._ucount = \
197 (sendreq)->req_send.req_bytes_packed; \
198 ompi_request_complete( &((sendreq)->req_send.req_base.req_ompi), (with_signal) ); \
199 \
200 PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_COMPLETE, \
201 &(sendreq->req_send.req_base), PERUSE_SEND); \
202 } while(0)
203
204 /*
205 * Release resources associated with a request
206 */
207
208 #define MCA_PML_CSUM_SEND_REQUEST_RETURN(sendreq) \
209 do { \
210 /* Let the base handle the reference counts */ \
211 MCA_PML_BASE_SEND_REQUEST_FINI((&(sendreq)->req_send)); \
212 OMPI_FREE_LIST_RETURN( &mca_pml_base_send_requests, \
213 (ompi_free_list_item_t*)sendreq); \
214 } while(0)
215
216
217 /*
218 * The PML has completed a send request. Note that this request
219 * may have been orphaned by the user or have already completed
220 * at the MPI level.
221 * This function will never be called directly from the upper level, as it
222 * should only be an internal call to the PML.
223 *
224 */
225 static inline void
226 send_request_pml_complete(mca_pml_csum_send_request_t *sendreq)
227 {
228 assert(false == sendreq->req_send.req_base.req_pml_complete);
229
230 if(sendreq->req_send.req_bytes_packed > 0) {
231 PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_XFER_END,
232 &(sendreq->req_send.req_base), PERUSE_SEND);
233 }
234
235 /* return mpool resources */
236 mca_pml_csum_free_rdma_resources(sendreq);
237
238 if (sendreq->req_send.req_send_mode == MCA_PML_BASE_SEND_BUFFERED &&
239 sendreq->req_send.req_addr != sendreq->req_send.req_base.req_addr) {
240 mca_pml_base_bsend_request_fini((ompi_request_t*)sendreq);
241 }
242
243 OPAL_THREAD_LOCK(&ompi_request_lock);
244 if(false == sendreq->req_send.req_base.req_ompi.req_complete) {
245 /* Should only be called for long messages (maybe synchronous) */
246 MCA_PML_CSUM_SEND_REQUEST_MPI_COMPLETE(sendreq, true);
247 }
248 sendreq->req_send.req_base.req_pml_complete = true;
249
250 if(sendreq->req_send.req_base.req_free_called) {
251 MCA_PML_CSUM_SEND_REQUEST_RETURN(sendreq);
252 }
253 OPAL_THREAD_UNLOCK(&ompi_request_lock);
254 }
255
256 /* returns true if request was completed on PML level */
257 static inline bool
258 send_request_pml_complete_check(mca_pml_csum_send_request_t *sendreq)
259 {
260 #if OPAL_ENABLE_MULTI_THREADS
261 opal_atomic_rmb();
262 #endif
263 /* if no more events are expected for the request and the whole message is
264 * already sent and send fragment scheduling isn't running in another
265 * thread then complete the request on PML level. From now on, if user
266 * called free on this request, the request structure can be reused for
267 * another request or if the request is persistent it can be restarted */
268 if(sendreq->req_state == 0 &&
269 sendreq->req_bytes_delivered >= sendreq->req_send.req_bytes_packed
270 && lock_send_request(sendreq)) {
271 send_request_pml_complete(sendreq);
272 return true;
273 }
274
275 return false;
276 }
277
278 /**
279 * Schedule additional fragments
280 */
281 int
282 mca_pml_csum_send_request_schedule_once(mca_pml_csum_send_request_t*);
283
284 static inline int
285 mca_pml_csum_send_request_schedule_exclusive(mca_pml_csum_send_request_t* sendreq)
286 {
287 int rc;
288 do {
289 rc = mca_pml_csum_send_request_schedule_once(sendreq);
290 if(OPAL_SOS_GET_ERROR_CODE(rc) == OMPI_ERR_OUT_OF_RESOURCE)
291 break;
292 } while(!unlock_send_request(sendreq));
293
294 if(OMPI_SUCCESS == rc)
295 send_request_pml_complete_check(sendreq);
296
297 return rc;
298 }
299
300 static inline void
301 mca_pml_csum_send_request_schedule(mca_pml_csum_send_request_t* sendreq)
302 {
303 /*
304 * Only allow one thread in this routine for a given request.
305 * However, we cannot block callers on a mutex, so simply keep track
306 * of the number of times the routine has been called and run through
307 * the scheduling logic once for every call.
308 */
309
310 if(!lock_send_request(sendreq))
311 return;
312
313 mca_pml_csum_send_request_schedule_exclusive(sendreq);
314 }
315
316 /**
317 * Start the specified request
318 */
319
320 int mca_pml_csum_send_request_start_buffered(
321 mca_pml_csum_send_request_t* sendreq,
322 mca_bml_base_btl_t* bml_btl,
323 size_t size);
324
325 int mca_pml_csum_send_request_start_copy(
326 mca_pml_csum_send_request_t* sendreq,
327 mca_bml_base_btl_t* bml_btl,
328 size_t size);
329
330 int mca_pml_csum_send_request_start_prepare(
331 mca_pml_csum_send_request_t* sendreq,
332 mca_bml_base_btl_t* bml_btl,
333 size_t size);
334
335 int mca_pml_csum_send_request_start_rdma(
336 mca_pml_csum_send_request_t* sendreq,
337 mca_bml_base_btl_t* bml_btl,
338 size_t size);
339
340 int mca_pml_csum_send_request_start_rndv(
341 mca_pml_csum_send_request_t* sendreq,
342 mca_bml_base_btl_t* bml_btl,
343 size_t size,
344 int flags);
345
346 static inline int
347 mca_pml_csum_send_request_start_btl( mca_pml_csum_send_request_t* sendreq,
348 mca_bml_base_btl_t* bml_btl )
349 {
350 size_t size = sendreq->req_send.req_bytes_packed;
351 mca_btl_base_module_t* btl = bml_btl->btl;
352 size_t eager_limit = btl->btl_eager_limit - sizeof(mca_pml_csum_hdr_t);
353 int rc;
354
355 if( OPAL_LIKELY(size <= eager_limit) ) {
356 switch(sendreq->req_send.req_send_mode) {
357 case MCA_PML_BASE_SEND_SYNCHRONOUS:
358 rc = mca_pml_csum_send_request_start_rndv(sendreq, bml_btl, size, 0);
359 break;
360 case MCA_PML_BASE_SEND_BUFFERED:
361 rc = mca_pml_csum_send_request_start_copy(sendreq, bml_btl, size);
362 break;
363 case MCA_PML_BASE_SEND_COMPLETE:
364 rc = mca_pml_csum_send_request_start_prepare(sendreq, bml_btl, size);
365 break;
366 default:
367 if (size != 0 && bml_btl->btl_flags & MCA_BTL_FLAGS_SEND_INPLACE) {
368 rc = mca_pml_csum_send_request_start_prepare(sendreq, bml_btl, size);
369 } else {
370 rc = mca_pml_csum_send_request_start_copy(sendreq, bml_btl, size);
371 }
372 break;
373 }
374 } else {
375 size = eager_limit;
376 if(OPAL_UNLIKELY(btl->btl_rndv_eager_limit < eager_limit))
377 size = btl->btl_rndv_eager_limit;
378 if(sendreq->req_send.req_send_mode == MCA_PML_BASE_SEND_BUFFERED) {
379 rc = mca_pml_csum_send_request_start_buffered(sendreq, bml_btl, size);
380 } else if
381 (opal_convertor_need_buffers(&sendreq->req_send.req_base.req_convertor) == false) {
382 unsigned char *base;
383 opal_convertor_get_current_pointer( &sendreq->req_send.req_base.req_convertor, (void**)&base );
384
385 if( 0 != (sendreq->req_rdma_cnt = (uint32_t)mca_pml_csum_rdma_btls(
386 sendreq->req_endpoint,
387 base,
388 sendreq->req_send.req_bytes_packed,
389 sendreq->req_rdma))) {
390 rc = mca_pml_csum_send_request_start_rdma(sendreq, bml_btl,
391 sendreq->req_send.req_bytes_packed);
392 if( OPAL_UNLIKELY(OMPI_SUCCESS != rc) ) {
393 mca_pml_csum_free_rdma_resources(sendreq);
394 }
395 } else {
396 rc = mca_pml_csum_send_request_start_rndv(sendreq, bml_btl, size,
397 MCA_PML_CSUM_HDR_FLAGS_CONTIG);
398 }
399 } else {
400 rc = mca_pml_csum_send_request_start_rndv(sendreq, bml_btl, size, 0);
401 }
402 }
403
404 return rc;
405 }
406
407 static inline int
408 mca_pml_csum_send_request_start( mca_pml_csum_send_request_t* sendreq )
409 {
410 mca_pml_csum_comm_t* comm = sendreq->req_send.req_base.req_comm->c_pml_comm;
411 mca_bml_base_endpoint_t* endpoint = (mca_bml_base_endpoint_t*)
412 sendreq->req_send.req_base.req_proc->proc_bml;
413 size_t i;
414
415 if( OPAL_UNLIKELY(endpoint == NULL) ) {
416 return OMPI_ERR_UNREACH;
417 }
418
419 sendreq->req_endpoint = endpoint;
420 sendreq->req_state = 0;
421 sendreq->req_lock = 0;
422 sendreq->req_pipeline_depth = 0;
423 sendreq->req_bytes_delivered = 0;
424 sendreq->req_pending = MCA_PML_CSUM_SEND_PENDING_NONE;
425 sendreq->req_send.req_base.req_sequence = OPAL_THREAD_ADD32(
426 &comm->procs[sendreq->req_send.req_base.req_peer].send_sequence,1);
427
428 MCA_PML_BASE_SEND_START( &sendreq->req_send.req_base );
429
430 for(i = 0; i < mca_bml_base_btl_array_get_size(&endpoint->btl_eager); i++) {
431 mca_bml_base_btl_t* bml_btl;
432 int rc;
433
434 /* select a btl */
435 bml_btl = mca_bml_base_btl_array_get_next(&endpoint->btl_eager);
436 rc = mca_pml_csum_send_request_start_btl(sendreq, bml_btl);
437 if( OPAL_LIKELY(OMPI_ERR_OUT_OF_RESOURCE != OPAL_SOS_GET_ERROR_CODE(rc)) )
438 return rc;
439 }
440 add_request_to_send_pending(sendreq, MCA_PML_CSUM_SEND_PENDING_START, true);
441
442 return OMPI_SUCCESS;
443 }
444
445 /**
446 * Initiate a put scheduled by the receiver.
447 */
448
449 void mca_pml_csum_send_request_put( mca_pml_csum_send_request_t* sendreq,
450 mca_btl_base_module_t* btl,
451 mca_pml_csum_rdma_hdr_t* hdr );
452
453 int mca_pml_csum_send_request_put_frag(mca_pml_csum_rdma_frag_t* frag);
454
455 /* This function tries to continue sendreq that was stuck because of resource
456 * unavailability. A sendreq may be added to send_pending list if there is no
457 * resource to send initial packet or there is not resource to schedule data
458 * for sending. The reason the sendreq was added to the list is stored inside
459 * sendreq struct and appropriate operation is retried when resource became
460 * available. bml_btl passed to the function doesn't represents sendreq
461 * destination, it represents BTL on which resource was freed, so only this BTL
462 * should be considered for sending packets */
463 void mca_pml_csum_send_request_process_pending(mca_bml_base_btl_t *bml_btl);
464
465 void mca_pml_csum_send_request_copy_in_out(mca_pml_csum_send_request_t *sendreq,
466 uint64_t send_offset, uint64_t send_length);
467
468 END_C_DECLS
469
470 #endif /* OMPI_PML_CSUM_SEND_REQUEST_H */
pml_csum_hdr.h
mca_pml_csum_rdma_hdr_t
Header used to initiate an RDMA operation.
Definition: pml_csum_hdr.h:245
OPAL_THREAD_ADD32
#define OPAL_THREAD_ADD32(x, y)
Use an atomic operation for increment/decrement if opal_using_threads() indicates that threads are in...
Definition: mutex.h:367
ompi_proc_t::proc_bml
struct mca_bml_base_endpoint_t * proc_bml
BML specific proc data.
Definition: proc.h:64
mca_bml_base_btl_t::btl_flags
uint32_t btl_flags
support for put/get?
Definition: bml.h:59
opal_atomic_rmb
void opal_atomic_rmb(void)
Read memory barrier.
pml_csum_rdma.h
mca_pml_csum_send_range_t
Definition: pml_csum_sendreq.h:63
mca_pml_csum_com_btl_t
Definition: pml_csum.h:297
mca_pml_base_request_t::req_comm
struct ompi_communicator_t * req_comm
communicator pointer
Definition: pml_base_request.h:63
mca_pml_csum_hdr_t
Union of defined hdr types.
Definition: pml_csum_hdr.h:298
ompi_ptr_t
Definition: types.h:52
mca_pml_comm_t
Cached on ompi_communicator_t to hold queues/state used by the PML<->PTL interface for matching logic...
Definition: pml_bfo_comm.h:51
opal_mutex_t
Definition: mutex_unix.h:53
base.h
mca_btl_base_module_t::btl_rndv_eager_limit
size_t btl_rndv_eager_limit
the size of a data sent in a first fragment of rendezvous protocol
Definition: btl.h:791
mca_pml_bfo_comm_proc_t::send_sequence
int32_t send_sequence
send side sequence number
Definition: pml_bfo_comm.h:38
mca_pml_base_request_t::req_peer
int32_t req_peer
peer process - rank w/in this communicator
Definition: pml_base_request.h:71
mca_mpool_base_registration_t
Definition: mpool.h:44
bml.h
BML Management Layer (BML)
opal_list_item_t
Definition: opal_list.h:98
OPAL_THREAD_LOCK
#define OPAL_THREAD_LOCK(mutex)
Lock a mutex if opal_using_threads() says that multiple threads may be active in the process...
Definition: mutex.h:223
mca_pml_base_send_request_t::req_addr
void * req_addr
pointer to send buffer - may not be application buffer
Definition: pml_base_sendreq.h:39
OPAL_THREAD_UNLOCK
#define OPAL_THREAD_UNLOCK(mutex)
Unlock a mutex if opal_using_threads() says that multiple threads may be active in the process...
Definition: mutex.h:309
mca_pml_base_request_t::req_convertor
opal_convertor_t req_convertor
always need the convertor
Definition: pml_base_request.h:66
mca_pml_csum_send_request_t
Definition: pml_csum_sendreq.h:44
mca_pml_base_send_request_t::req_base
mca_pml_base_request_t req_base
base request type - common data structure for use by wait/test
Definition: pml_base_sendreq.h:38
opal_list_append
#define opal_list_append(l, i)
Append an item to the end of the list.
Definition: opal_list.h:410
mca_pml_base_request_t::req_pml_complete
volatile bool req_pml_complete
flag indicating if the pt-2-pt layer is done with this request
Definition: pml_base_request.h:61
btl.h
Byte Transfer Layer (BTL)
mca_pml_base_request_t::req_proc
struct ompi_proc_t * req_proc
peer process
Definition: pml_base_request.h:73
pml_csum_comm.h
mca_bml_base_endpoint_t::btl_eager
mca_bml_base_btl_array_t btl_eager
array of btls to use for first fragments
Definition: bml.h:228
mca_pml_csum_rdma_frag_t
Definition: pml_csum_rdmafrag.h:35
ompi_request_t::req_complete
volatile bool req_complete
Flag indicating wether request has completed.
Definition: request.h:104
mca_mpool_base_module_t::mpool_deregister
mca_mpool_base_module_deregister_fn_t mpool_deregister
deregister memory
Definition: mpool.h:181
mca_pml_base_send_request_t
Base type for send requests.
Definition: pml_base_sendreq.h:37
ompi_free_list_item_t
Definition: ompi_free_list.h:62
mca_bml_base_endpoint_t
Structure associated w/ ompi_proc_t that contains the set of BTLs used to reach a destination...
Definition: bml.h:222
mca_pml_base_request_t::req_addr
void * req_addr
pointer to application buffer
Definition: pml_base_request.h:69
MCA_PML_BASE_SEND_START
#define MCA_PML_BASE_SEND_START(request)
Mark the request as started from the PML base point of view.
Definition: pml_base_sendreq.h:120
mca_bml_base_btl_t
Definition: bml.h:58
opal_list_t
Definition: opal_list.h:147
opal_list_remove_first
static opal_list_item_t * opal_list_remove_first(opal_list_t *list)
Remove the first item from the list and return it.
Definition: opal_list.h:522
opal_list_prepend
static void opal_list_prepend(opal_list_t *list, opal_list_item_t *item)
Prepend an item to the beginning of the list.
Definition: opal_list.h:469
pml_csum_rdmafrag.h
mca_bml_base_btl_t::btl
struct mca_btl_base_module_t * btl
BTL module.
Definition: bml.h:61
mca_pml_base_request_t::req_ompi
ompi_request_t req_ompi
base request
Definition: pml_base_request.h:60
mca_bml_base_btl_array_get_size
static size_t mca_bml_base_btl_array_get_size(mca_bml_base_btl_array_t *array)
If required, reallocate (grow) the array to the indicate size.
Definition: bml.h:91
mca_btl_base_module_t
BTL module interface functions and attributes.
Definition: btl.h:786
mca_pml_base_send_request_t::req_bytes_packed
size_t req_bytes_packed
packed size of a message given the datatype and count
Definition: pml_base_sendreq.h:40
mca_pml_base_send_request_t::req_send_mode
mca_pml_base_send_mode_t req_send_mode
type of send
Definition: pml_base_sendreq.h:41
ompi_request_t
Main top-level request struct definition.
Definition: request.h:100
pml_base_sendreq.h
mca_btl_base_module_t::btl_eager_limit
size_t btl_eager_limit
maximum size of first fragment – eager send
Definition: btl.h:790
OBJ_CLASS_DECLARATION
#define OBJ_CLASS_DECLARATION(NAME)
Declaration for class descriptor.
Definition: opal_object.h:236
mca_pml_base_request_t::req_sequence
uint64_t req_sequence
sequence number for MPI pt-2-pt ordering
Definition: pml_base_request.h:74
mca_pml_base_request_t::req_free_called
volatile bool req_free_called
flag indicating if the user has freed this request
Definition: pml_base_request.h:65
mca_bml_base_btl_array_get_next
static mca_bml_base_btl_t * mca_bml_base_btl_array_get_next(mca_bml_base_btl_array_t *array)
Return the next LRU index in the array.
Definition: bml.h:179