ch3u_rma_sync.c 129 KB
Newer Older
1 2 3 4 5 6 7 8 9
/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpidimpl.h"
#include "mpidrma.h"

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
static int EnableImmedAcc = 1;
void MPIDI_CH3_RMA_SetAccImmed( int flag )
{
    EnableImmedAcc = flag;
}

#ifdef USE_MPIU_INSTR
MPIU_INSTR_DURATION_DECL(winfence_clearlock);
MPIU_INSTR_DURATION_DECL(winfence_rs);
MPIU_INSTR_DURATION_DECL(winfence_issue);
MPIU_INSTR_DURATION_DECL(winfence_complete);
MPIU_INSTR_DURATION_DECL(winfence_wait);
MPIU_INSTR_DURATION_DECL(winfence_block);
MPIU_INSTR_DURATION_DECL(winpost_clearlock);
MPIU_INSTR_DURATION_DECL(winpost_sendsync);
MPIU_INSTR_DURATION_DECL(winstart_clearlock);
MPIU_INSTR_DURATION_DECL(wincomplete_issue);
MPIU_INSTR_DURATION_DECL(wincomplete_complete);
MPIU_INSTR_DURATION_DECL(wincomplete_recvsync);
29
MPIU_INSTR_DURATION_DECL(wincomplete_block);
30 31 32 33 34
MPIU_INSTR_DURATION_DECL(winwait_wait);
MPIU_INSTR_DURATION_DECL(winlock_getlocallock);
MPIU_INSTR_DURATION_DECL(winunlock_getlock);
MPIU_INSTR_DURATION_DECL(winunlock_issue);
MPIU_INSTR_DURATION_DECL(winunlock_complete);
35
MPIU_INSTR_DURATION_DECL(winunlock_block);
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
MPIU_INSTR_DURATION_DECL(lockqueue_alloc);
MPIU_INSTR_DURATION_DECL(rmapkt_acc);
MPIU_INSTR_DURATION_DECL(rmapkt_acc_predef);
MPIU_INSTR_DURATION_DECL(rmapkt_acc_immed);
MPIU_INSTR_DURATION_EXTERN_DECL(rmaqueue_alloc);
void MPIDI_CH3_RMA_InitInstr(void);

void MPIDI_CH3_RMA_InitInstr(void)
{
    MPIU_INSTR_DURATION_INIT(lockqueue_alloc,0,"Allocate Lock Queue element");
    MPIU_INSTR_DURATION_INIT(winfence_clearlock,1,"WIN_FENCE:Clear prior lock");
    MPIU_INSTR_DURATION_INIT(winfence_rs,0,"WIN_FENCE:ReduceScatterBlock");
    MPIU_INSTR_DURATION_INIT(winfence_issue,2,"WIN_FENCE:Issue RMA ops");
    MPIU_INSTR_DURATION_INIT(winfence_complete,1,"WIN_FENCE:Complete RMA ops");
    MPIU_INSTR_DURATION_INIT(winfence_wait,1,"WIN_FENCE:Wait for ops from other processes");
    MPIU_INSTR_DURATION_INIT(winfence_block,0,"WIN_FENCE:Wait for any progress");
    MPIU_INSTR_DURATION_INIT(winpost_clearlock,1,"WIN_POST:Clear prior lock");
    MPIU_INSTR_DURATION_INIT(winpost_sendsync,1,"WIN_POST:Senc sync messages");
    MPIU_INSTR_DURATION_INIT(winstart_clearlock,1,"WIN_START:Clear prior lock");
    MPIU_INSTR_DURATION_INIT(wincomplete_recvsync,1,"WIN_COMPLETE:Recv sync messages");
    MPIU_INSTR_DURATION_INIT(wincomplete_issue,2,"WIN_COMPLETE:Issue RMA ops");
    MPIU_INSTR_DURATION_INIT(wincomplete_complete,1,"WIN_COMPLETE:Complete RMA ops");
58
    MPIU_INSTR_DURATION_INIT(wincomplete_block,0,"WIN_COMPLETE:Wait for any progress");
59 60 61 62 63
    MPIU_INSTR_DURATION_INIT(winwait_wait,1,"WIN_WAIT:Wait for ops from other processes");
    MPIU_INSTR_DURATION_INIT(winlock_getlocallock,0,"WIN_LOCK:Get local lock");
    MPIU_INSTR_DURATION_INIT(winunlock_issue,2,"WIN_UNLOCK:Issue RMA ops");
    MPIU_INSTR_DURATION_INIT(winunlock_complete,1,"WIN_UNLOCK:Complete RMA ops");
    MPIU_INSTR_DURATION_INIT(winunlock_getlock,0,"WIN_UNLOCK:Acquire lock");
64
    MPIU_INSTR_DURATION_INIT(winunlock_block,0,"WIN_UNLOCK:Wait for any progress");
65 66 67 68 69 70
    MPIU_INSTR_DURATION_INIT(rmapkt_acc,0,"RMA:PKTHANDLER for Accumulate");
    MPIU_INSTR_DURATION_INIT(rmapkt_acc_predef,0,"RMA:PKTHANDLER for Accumulate: predef dtype");
    MPIU_INSTR_DURATION_INIT(rmapkt_acc_immed,0,"RMA:PKTHANDLER for Accum immed");
}
#endif

71 72 73 74 75 76 77
/*
 * These routines provide a default implementation of the MPI RMA operations
 * in terms of the low-level, two-sided channel operations.  A channel
 * may override these functions, on a per-window basis, by defining 
 * USE_CHANNEL_RMA_TABLE and providing the function MPIDI_CH3_RMAWinFnsInit.
 */

78
/*
79
 * TODO: 
80 81 82
 * 
 */

83 84
#define SYNC_POST_TAG 100

85 86 87 88 89 90 91 92 93 94
static int MPIDI_CH3I_Send_rma_msg(MPIDI_RMA_ops * rma_op, MPID_Win * win_ptr, 
				   MPI_Win source_win_handle, 
				   MPI_Win target_win_handle, 
				   MPIDI_RMA_dtype_info * dtype_info, 
				   void ** dataloop, MPID_Request ** request);
static int MPIDI_CH3I_Recv_rma_msg(MPIDI_RMA_ops * rma_op, MPID_Win * win_ptr, 
				   MPI_Win source_win_handle, 
				   MPI_Win target_win_handle, 
				   MPIDI_RMA_dtype_info * dtype_info, 
				   void ** dataloop, MPID_Request ** request); 
95 96 97 98 99
static int MPIDI_CH3I_Send_contig_acc_msg(MPIDI_RMA_ops * rma_op, 
					  MPID_Win * win_ptr, 
					  MPI_Win source_win_handle, 
					  MPI_Win target_win_handle, 
					  MPID_Request ** request);
100 101 102 103 104
static int MPIDI_CH3I_Do_passive_target_rma(MPID_Win *win_ptr, 
					    int *wait_for_rma_done_pkt);
static int MPIDI_CH3I_Send_lock_put_or_acc(MPID_Win *win_ptr);
static int MPIDI_CH3I_Send_lock_get(MPID_Win *win_ptr);

105 106 107 108
static int create_datatype(const MPIDI_RMA_dtype_info *dtype_info,
                           const void *dataloop, MPI_Aint dataloop_sz,
                           const void *o_addr, int o_count, MPI_Datatype o_datatype,
                           MPID_Datatype **combined_dtp);
109 110 111 112 113 114 115 116

#undef FUNCNAME
#define FUNCNAME MPIDI_Win_fence
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
int MPIDI_Win_fence(int assert, MPID_Win *win_ptr)
{
    int mpi_errno = MPI_SUCCESS;
117
    int comm_size;
118
    int *rma_target_proc, *nops_to_proc, i, total_op_count, *curr_ops_cnt;
119
    MPIDI_RMA_ops *curr_ptr;
120 121 122
    MPID_Comm *comm_ptr;
    MPI_Win source_win_handle, target_win_handle;
    MPID_Progress_state progress_state;
123
    int errflag = FALSE;
124
    MPIU_CHKLMEM_DECL(3);
125 126 127 128 129 130 131 132 133 134 135 136 137
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_WIN_FENCE);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_WIN_FENCE);

    /* In case this process was previously the target of passive target rma
     * operations, we need to take care of the following...
     * Since we allow MPI_Win_unlock to return without a done ack from
     * the target in the case of multiple rma ops and exclusive lock,
     * we need to check whether there is a lock on the window, and if
     * there is a lock, poke the progress engine until the operartions
     * have completed and the lock is released. */
    if (win_ptr->current_lock_type != MPID_LOCK_NONE)
    {
138
	MPIU_INSTR_DURATION_START(winfence_clearlock);
139 140 141 142 143 144
	MPID_Progress_start(&progress_state);
	while (win_ptr->current_lock_type != MPID_LOCK_NONE)
	{
	    /* poke the progress engine */
	    mpi_errno = MPID_Progress_wait(&progress_state);
	    /* --BEGIN ERROR HANDLING-- */
145
	    if (mpi_errno != MPI_SUCCESS) {
146
		MPID_Progress_end(&progress_state);
147
		MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winnoprogress");
148 149
	    }
	    /* --END ERROR HANDLING-- */
150
	    MPIU_INSTR_DURATION_INCR(winfence_clearlock,0,1);
151 152
	}
	MPID_Progress_end(&progress_state);
153
	MPIU_INSTR_DURATION_END(winfence_clearlock);
154
    }
155 156 157

    /* Note that the NOPRECEDE and NOSUCCEED must be specified by all processes
       in the window's group if any specify it */
158 159 160 161 162 163
    if (assert & MPI_MODE_NOPRECEDE)
    {
	win_ptr->fence_cnt = (assert & MPI_MODE_NOSUCCEED) ? 0 : 1;
	goto fn_exit;
    }
    
164
    if (win_ptr->fence_cnt == 0)
165 166 167 168
    {
	/* win_ptr->fence_cnt == 0 means either this is the very first
	   call to fence or the preceding fence had the
	   MPI_MODE_NOSUCCEED assert. 
169 170 171 172 173

           If this fence has MPI_MODE_NOSUCCEED, do nothing and return.
	   Otherwise just increment the fence count and return. */

	if (!(assert & MPI_MODE_NOSUCCEED)) win_ptr->fence_cnt = 1;
174 175 176
    }
    else
    {
177 178
	MPIDI_RMA_ops **prevNextPtr, *tmpptr;
	MPIU_INSTR_DURATION_START(winfence_rs);
179
	/* This is the second or later fence. Do all the preceding RMA ops. */
180
	comm_ptr = win_ptr->comm_ptr;
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
	/* First inform every process whether it is a target of RMA
	   ops from this process */
	comm_size = comm_ptr->local_size;

	MPIU_CHKLMEM_MALLOC(rma_target_proc, int *, comm_size*sizeof(int),
			    mpi_errno, "rma_target_proc");
	for (i=0; i<comm_size; i++) rma_target_proc[i] = 0;
	
	/* keep track of no. of ops to each proc. Needed for knowing
	   whether or not to decrement the completion counter. The
	   completion counter is decremented only on the last
	   operation. */
	MPIU_CHKLMEM_MALLOC(nops_to_proc, int *, comm_size*sizeof(int),
			    mpi_errno, "nops_to_proc");
	for (i=0; i<comm_size; i++) nops_to_proc[i] = 0;

	/* set rma_target_proc[i] to 1 if rank i is a target of RMA
	   ops from this process */
	total_op_count = 0;
200
	curr_ptr = win_ptr->rma_ops_list_head;
201 202 203 204 205 206 207 208 209 210 211
	while (curr_ptr != NULL)
	{
	    total_op_count++;
	    rma_target_proc[curr_ptr->target_rank] = 1;
	    nops_to_proc[curr_ptr->target_rank]++;
	    curr_ptr = curr_ptr->next;
	}
	
	MPIU_CHKLMEM_MALLOC(curr_ops_cnt, int *, comm_size*sizeof(int),
			    mpi_errno, "curr_ops_cnt");
	for (i=0; i<comm_size; i++) curr_ops_cnt[i] = 0;
212 213
	/* do a reduce_scatter_block (with MPI_SUM) on rma_target_proc. 
	   As a result,
214 215 216 217 218 219
	   each process knows how many other processes will be doing
	   RMA ops on its window */  
            
	/* first initialize the completion counter. */
	win_ptr->my_counter = comm_size;
            
220
	mpi_errno = MPIR_Reduce_scatter_block_impl(MPI_IN_PLACE, rma_target_proc, 1,
221
                                                   MPI_INT, MPI_SUM, comm_ptr, &errflag);
222
	MPIU_INSTR_DURATION_END(winfence_rs);
223 224
	/* result is stored in rma_target_proc[0] */
	if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
225
        MPIU_ERR_CHKANDJUMP(errflag, mpi_errno, MPI_ERR_OTHER, "**coll_fail");
226 227 228 229 230 231

	/* Set the completion counter */
	/* FIXME: MT: this needs to be done atomically because other
	   procs have the address and could decrement it. */
	win_ptr->my_counter = win_ptr->my_counter - comm_size + 
	    rma_target_proc[0];  
232 233 234 235

	MPIU_INSTR_DURATION_START(winfence_issue);
	MPIU_INSTR_DURATION_INCR(winfence_issue,0,total_op_count);
	MPIU_INSTR_DURATION_MAX(winfence_issue,1,total_op_count);
236
	i = 0;
237
	curr_ptr    = win_ptr->rma_ops_list_head;
238
	prevNextPtr = &win_ptr->rma_ops_list_head;
239 240 241 242 243 244 245 246 247 248 249 250 251
	while (curr_ptr != NULL)
	{
	    /* The completion counter at the target is decremented only on 
	       the last RMA operation. We indicate the last operation by 
	       passing the source_win_handle only on the last operation. 
	       Otherwise, we pass NULL */
	    if (curr_ops_cnt[curr_ptr->target_rank] ==
		nops_to_proc[curr_ptr->target_rank] - 1) 
		source_win_handle = win_ptr->handle;
	    else 
		source_win_handle = MPI_WIN_NULL;
	    
	    target_win_handle = win_ptr->all_win_handles[curr_ptr->target_rank];
252 253

	    curr_ptr->dataloop = 0;
254 255 256 257 258 259
	    switch (curr_ptr->type)
	    {
	    case (MPIDI_RMA_PUT):
	    case (MPIDI_RMA_ACCUMULATE):
		mpi_errno = MPIDI_CH3I_Send_rma_msg(curr_ptr, win_ptr,
					source_win_handle, target_win_handle, 
260 261
					&curr_ptr->dtype_info,
					&curr_ptr->dataloop, &curr_ptr->request);
262 263
		if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
		break;
264 265 266 267
	    case MPIDI_RMA_ACC_CONTIG:
		mpi_errno = MPIDI_CH3I_Send_contig_acc_msg(curr_ptr, win_ptr,
				   source_win_handle, target_win_handle, 
				   &curr_ptr->request );
268
		if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
269
		break;
270 271 272
	    case (MPIDI_RMA_GET):
		mpi_errno = MPIDI_CH3I_Recv_rma_msg(curr_ptr, win_ptr,
					source_win_handle, target_win_handle, 
273 274
					&curr_ptr->dtype_info, 
					&curr_ptr->dataloop, &curr_ptr->request);
275 276 277
		if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
		break;
	    default:
278
		MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winInvalidOp");
279 280 281
	    }
	    i++;
	    curr_ops_cnt[curr_ptr->target_rank]++;
282 283 284 285 286 287 288 289 290 291 292 293 294
	    /* If the request is null, we can remove it immediately */
	    if (!curr_ptr->request) {
		if (curr_ptr->dataloop != NULL) {
		    MPIU_Free(curr_ptr->dataloop); /* allocated in send_rma_msg or 
						      recv_rma_msg */
		}
		tmpptr       = curr_ptr->next;
		*prevNextPtr = tmpptr;
		MPIU_Free( curr_ptr );
		curr_ptr     = tmpptr;
	    }
	    else  {
		prevNextPtr = &curr_ptr->next;
295
		curr_ptr    = curr_ptr->next;
296 297 298 299
		/* FIXME: We could at least occassionally try to wait
		   on completion of the pending send requests rather than
		   focus on filling the queues.  */
	    }
300
	}
301 302 303 304 305 306 307 308 309 310 311 312 313
	MPIU_INSTR_DURATION_END(winfence_issue);

	/* We replaced a loop over an array of requests with a list of the
	   incomplete requests.  The reason to do 
	   that is for long lists - processing the entire list until
	   all are done introduces a potentially n^2 time.  In 
	   testing with test/mpi/perf/manyrma.c , the number of iterations
	   within the "while (total_op_count) was O(total_op_count).
	   
	   Another alternative is to create a more compressed list (storing
	   only the necessary information, reducing the number of cache lines
	   needed while looping through the requests.
	*/
314 315
	if (total_op_count)
	{ 
316 317
	    int ntimes = 0;
	    MPIU_INSTR_DURATION_START(winfence_complete);
318
	    MPID_Progress_start(&progress_state);
319 320 321 322 323 324 325 326 327 328 329 330 331
	    /* Process all operations until they are complete */
	    while (win_ptr->rma_ops_list_head) {
		int loopcount = 0;
		prevNextPtr = &win_ptr->rma_ops_list_head;
		ntimes++;
		curr_ptr = win_ptr->rma_ops_list_head;
		do {
		    if (MPID_Request_is_complete(curr_ptr->request)) {
			/* Once we find a complete request, we complete
			 as many as possible until we find an incomplete
			 or null request */
			do {
			    mpi_errno = curr_ptr->request->status.MPI_ERROR;
332
			    /* --BEGIN ERROR HANDLING-- */
333
			    if (mpi_errno != MPI_SUCCESS) {
334
				MPID_Progress_end(&progress_state);
335
				MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winRMAmessage");
336 337
			    }
			    /* --END ERROR HANDLING-- */
338 339 340 341 342 343 344 345 346 347
			    MPID_Request_release(curr_ptr->request);
			    if (curr_ptr->dataloop != NULL) {
				MPIU_Free(curr_ptr->dataloop); /* allocated in send_rma_msg or 
								  recv_rma_msg */
			    }
			    /* We can remove and free this rma op element */
			    tmpptr       = curr_ptr->next;
			    *prevNextPtr = tmpptr;
			    MPIU_Free( curr_ptr );
			    curr_ptr     = tmpptr;
348
			}
349 350 351 352 353 354
			while (curr_ptr &&
			       MPID_Request_is_complete(curr_ptr->request));
			/* Once a request completes, we wait for another
			   operation to arrive rather than check the
			   rest of the requests.  */
			break;
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
		    else {
			/* In many cases, if the list of pending requests
			   is long, there's no point in checking the entire
			   list */
			if (loopcount++ > 4) /* FIXME: threshold as parameter */
			    break;  /* wait for an event */
			prevNextPtr = &curr_ptr->next;
			curr_ptr    = curr_ptr->next;
		    }
		} while (curr_ptr);
         
		/* Wait for something to arrive*/
		/* In some tests, this hung unless the test ensured that 
		   there was an incomplete request. */
		curr_ptr = win_ptr->rma_ops_list_head;
		if (curr_ptr && !MPID_Request_is_complete(curr_ptr->request) ) {
		    MPIU_INSTR_DURATION_START(winfence_block);
		    mpi_errno = MPID_Progress_wait(&progress_state);
		    /* --BEGIN ERROR HANDLING-- */
		    if (mpi_errno != MPI_SUCCESS) {
			MPID_Progress_end(&progress_state);
			MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winnoprogress");
		    }
		    /* --END ERROR HANDLING-- */
		    MPIU_INSTR_DURATION_END(winfence_block);
381
		}
382
	    } /* While list of rma operation is non-empty */
383
	    MPID_Progress_end(&progress_state);
384 385
	    MPIU_INSTR_DURATION_INCR(winfence_complete,0,ntimes);
	    MPIU_INSTR_DURATION_END(winfence_complete);
386 387
	}
            
388 389
	win_ptr->rma_ops_list_head = NULL;
	win_ptr->rma_ops_list_tail = NULL;
390 391 392 393
	
	/* wait for all operations from other processes to finish */
	if (win_ptr->my_counter)
	{
394
	    MPIU_INSTR_DURATION_START(winfence_wait);
395 396 397 398 399
	    MPID_Progress_start(&progress_state);
	    while (win_ptr->my_counter)
	    {
		mpi_errno = MPID_Progress_wait(&progress_state);
		/* --BEGIN ERROR HANDLING-- */
400
		if (mpi_errno != MPI_SUCCESS) {
401
		    MPID_Progress_end(&progress_state);
402
		    MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winnoprogress");
403 404
		}
		/* --END ERROR HANDLING-- */
405
		MPIU_INSTR_DURATION_INCR(winfence_wait,0,1);
406 407
	    }
	    MPID_Progress_end(&progress_state);
408
	    MPIU_INSTR_DURATION_END(winfence_wait);
409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426
	} 
	
	if (assert & MPI_MODE_NOSUCCEED)
	{
	    win_ptr->fence_cnt = 0;
	}
    }

 fn_exit:
    MPIU_CHKLMEM_FREEALL();
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_WIN_FENCE);
    return mpi_errno;
    /* --BEGIN ERROR HANDLING-- */
 fn_fail:
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}

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
/* create_datatype() creates a new struct datatype for the dtype_info
   and the dataloop of the target datatype together with the user data */
#undef FUNCNAME
#define FUNCNAME create_datatype
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
static int create_datatype(const MPIDI_RMA_dtype_info *dtype_info,
                           const void *dataloop, MPI_Aint dataloop_sz,
                           const void *o_addr, int o_count, MPI_Datatype o_datatype,
                           MPID_Datatype **combined_dtp)
{
    int mpi_errno = MPI_SUCCESS;
    /* datatype_set_contents wants an array 'ints' which is the
       blocklens array with count prepended to it.  So blocklens
       points to the 2nd element of ints to avoid having to copy
       blocklens into ints later. */
    int ints[4];
    int *blocklens = &ints[1];
    MPI_Aint displaces[3];
    MPI_Datatype datatypes[3];
    const int count = 3;
    MPI_Datatype combined_datatype;
    MPIDI_STATE_DECL(MPID_STATE_CREATE_DATATYPE);

    MPIDI_FUNC_ENTER(MPID_STATE_CREATE_DATATYPE);

    /* create datatype */
    displaces[0] = MPIU_PtrToAint(dtype_info);
    blocklens[0] = sizeof(*dtype_info);
    datatypes[0] = MPI_BYTE;
    
    displaces[1] = MPIU_PtrToAint(dataloop);
    blocklens[1] = dataloop_sz;
    datatypes[1] = MPI_BYTE;
    
    displaces[2] = MPIU_PtrToAint(o_addr);
    blocklens[2] = o_count;
    datatypes[2] = o_datatype;
    
    mpi_errno = MPID_Type_struct(count,
                                 blocklens,
                                 displaces,
                                 datatypes,
                                 &combined_datatype);
471 472
    if (mpi_errno) MPIU_ERR_POP(mpi_errno);
   
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
    ints[0] = count;

    MPID_Datatype_get_ptr(combined_datatype, *combined_dtp);    
    mpi_errno = MPID_Datatype_set_contents(*combined_dtp,
				           MPI_COMBINER_STRUCT,
				           count+1, /* ints (cnt,blklen) */
				           count, /* aints (disps) */
				           count, /* types */
				           ints,
				           displaces,
				           datatypes);
    if (mpi_errno) MPIU_ERR_POP(mpi_errno);

    /* Commit datatype */
    
    MPID_Dataloop_create(combined_datatype,
                         &(*combined_dtp)->dataloop,
                         &(*combined_dtp)->dataloop_size,
                         &(*combined_dtp)->dataloop_depth,
                         MPID_DATALOOP_HOMOGENEOUS);
    
    /* create heterogeneous dataloop */
    MPID_Dataloop_create(combined_datatype,
                         &(*combined_dtp)->hetero_dloop,
                         &(*combined_dtp)->hetero_dloop_size,
                         &(*combined_dtp)->hetero_dloop_depth,
                         MPID_DATALOOP_HETEROGENEOUS);
 
 fn_exit:
    MPIDI_FUNC_EXIT(MPID_STATE_CREATE_DATATYPE);
    return mpi_errno;
 fn_fail:
    goto fn_exit;
}

508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523

#undef FUNCNAME
#define FUNCNAME MPIDI_CH3I_Send_rma_msg
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
static int MPIDI_CH3I_Send_rma_msg(MPIDI_RMA_ops *rma_op, MPID_Win *win_ptr,
				   MPI_Win source_win_handle, 
				   MPI_Win target_win_handle, 
				   MPIDI_RMA_dtype_info *dtype_info, 
				   void **dataloop, MPID_Request **request) 
{
    MPIDI_CH3_Pkt_t upkt;
    MPIDI_CH3_Pkt_put_t *put_pkt = &upkt.put;
    MPIDI_CH3_Pkt_accum_t *accum_pkt = &upkt.accum;
    MPID_IOV iov[MPID_IOV_LIMIT];
    int mpi_errno=MPI_SUCCESS, predefined;
524
    int origin_dt_derived, target_dt_derived, origin_type_size, iovcnt; 
525 526 527 528 529 530 531 532 533
    MPIDI_VC_t * vc;
    MPID_Comm *comm_ptr;
    MPID_Datatype *target_dtp=NULL, *origin_dtp=NULL;
    MPIU_CHKPMEM_DECL(1);
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_CH3I_SEND_RMA_MSG);
    MPIDI_STATE_DECL(MPID_STATE_MEMCPY);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_CH3I_SEND_RMA_MSG);

534 535
    *request = NULL;

536 537 538 539 540 541 542 543 544 545 546
    if (rma_op->type == MPIDI_RMA_PUT)
    {
        MPIDI_Pkt_init(put_pkt, MPIDI_CH3_PKT_PUT);
        put_pkt->addr = (char *) win_ptr->base_addrs[rma_op->target_rank] +
            win_ptr->disp_units[rma_op->target_rank] * rma_op->target_disp;

        put_pkt->count = rma_op->target_count;
        put_pkt->datatype = rma_op->target_datatype;
        put_pkt->dataloop_size = 0;
        put_pkt->target_win_handle = target_win_handle;
        put_pkt->source_win_handle = source_win_handle;
547
        
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566
        iov[0].MPID_IOV_BUF = (MPID_IOV_BUF_CAST) put_pkt;
        iov[0].MPID_IOV_LEN = sizeof(*put_pkt);
    }
    else
    {
        MPIDI_Pkt_init(accum_pkt, MPIDI_CH3_PKT_ACCUMULATE);
        accum_pkt->addr = (char *) win_ptr->base_addrs[rma_op->target_rank] +
            win_ptr->disp_units[rma_op->target_rank] * rma_op->target_disp;
        accum_pkt->count = rma_op->target_count;
        accum_pkt->datatype = rma_op->target_datatype;
        accum_pkt->dataloop_size = 0;
        accum_pkt->op = rma_op->op;
        accum_pkt->target_win_handle = target_win_handle;
        accum_pkt->source_win_handle = source_win_handle;

        iov[0].MPID_IOV_BUF = (MPID_IOV_BUF_CAST) accum_pkt;
        iov[0].MPID_IOV_LEN = sizeof(*accum_pkt);
    }

567 568 569 570
    /*    printf("send pkt: type %d, addr %d, count %d, base %d\n", rma_pkt->type,
          rma_pkt->addr, rma_pkt->count, win_ptr->base_addrs[rma_op->target_rank]);
          fflush(stdout);
    */
571

572
    comm_ptr = win_ptr->comm_ptr;
573
    MPIDI_Comm_get_vc_set_active(comm_ptr, rma_op->target_rank, &vc);
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

    MPIDI_CH3I_DATATYPE_IS_PREDEFINED(rma_op->origin_datatype, predefined);
    if (!predefined)
    {
        origin_dt_derived = 1;
        MPID_Datatype_get_ptr(rma_op->origin_datatype, origin_dtp);
    }
    else
    {
        origin_dt_derived = 0;
    }

    MPIDI_CH3I_DATATYPE_IS_PREDEFINED(rma_op->target_datatype, predefined);
    if (!predefined)
    {
        target_dt_derived = 1;
        MPID_Datatype_get_ptr(rma_op->target_datatype, target_dtp);
    }
    else
    {
        target_dt_derived = 0;
    }

    if (target_dt_derived)
    {
        /* derived datatype on target. fill derived datatype info */
        dtype_info->is_contig = target_dtp->is_contig;
601
        dtype_info->max_contig_blocks = target_dtp->max_contig_blocks;
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
        dtype_info->size = target_dtp->size;
        dtype_info->extent = target_dtp->extent;
        dtype_info->dataloop_size = target_dtp->dataloop_size;
        dtype_info->dataloop_depth = target_dtp->dataloop_depth;
        dtype_info->eltype = target_dtp->eltype;
        dtype_info->dataloop = target_dtp->dataloop;
        dtype_info->ub = target_dtp->ub;
        dtype_info->lb = target_dtp->lb;
        dtype_info->true_ub = target_dtp->true_ub;
        dtype_info->true_lb = target_dtp->true_lb;
        dtype_info->has_sticky_ub = target_dtp->has_sticky_ub;
        dtype_info->has_sticky_lb = target_dtp->has_sticky_lb;

	MPIU_CHKPMEM_MALLOC(*dataloop, void *, target_dtp->dataloop_size, 
			    mpi_errno, "dataloop");

	MPIDI_FUNC_ENTER(MPID_STATE_MEMCPY);
619
        MPIU_Memcpy(*dataloop, target_dtp->dataloop, target_dtp->dataloop_size);
620
	MPIDI_FUNC_EXIT(MPID_STATE_MEMCPY);
621 622
        /* the dataloop can have undefined padding sections, so we need to let
         * valgrind know that it is OK to pass this data to writev later on */
623
        MPL_VG_MAKE_MEM_DEFINED(*dataloop, target_dtp->dataloop_size);
624 625 626 627 628 629 630 631 632 633 634 635 636

        if (rma_op->type == MPIDI_RMA_PUT)
	{
            put_pkt->dataloop_size = target_dtp->dataloop_size;
	}
        else
	{
            accum_pkt->dataloop_size = target_dtp->dataloop_size;
	}
    }

    MPID_Datatype_get_size_macro(rma_op->origin_datatype, origin_type_size);

637
    if (!target_dt_derived)
638
    {
639 640 641 642
        /* basic datatype on target */
        if (!origin_dt_derived)
        {
            /* basic datatype on origin */
643 644 645
            iov[1].MPID_IOV_BUF = (MPID_IOV_BUF_CAST)rma_op->origin_addr;
            iov[1].MPID_IOV_LEN = rma_op->origin_count * origin_type_size;
            iovcnt = 2;
646
	    MPIU_THREAD_CS_ENTER(CH3COMM,vc);
647
            mpi_errno = MPIDI_CH3_iStartMsgv(vc, iov, iovcnt, request);
648
	    MPIU_THREAD_CS_EXIT(CH3COMM,vc);
649
            MPIU_ERR_CHKANDJUMP(mpi_errno, mpi_errno, MPI_ERR_OTHER, "**ch3|rmamsg");
650 651
        }
        else
652 653 654
        {
            /* derived datatype on origin */
            *request = MPID_Request_create();
655
            MPIU_ERR_CHKANDJUMP(*request == NULL,mpi_errno,MPI_ERR_OTHER,"**nomemreq");
656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
            
            MPIU_Object_set_ref(*request, 2);
            (*request)->kind = MPID_REQUEST_SEND;
            
            (*request)->dev.segment_ptr = MPID_Segment_alloc( );
            MPIU_ERR_CHKANDJUMP1((*request)->dev.segment_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem", "**nomem %s", "MPID_Segment_alloc");

            (*request)->dev.datatype_ptr = origin_dtp;
            /* this will cause the datatype to be freed when the request
               is freed. */
            MPID_Segment_init(rma_op->origin_addr, rma_op->origin_count,
                              rma_op->origin_datatype,
                              (*request)->dev.segment_ptr, 0);
            (*request)->dev.segment_first = 0;
            (*request)->dev.segment_size = rma_op->origin_count * origin_type_size;

            (*request)->dev.OnFinal = 0;
            (*request)->dev.OnDataAvail = 0;

675
	    MPIU_THREAD_CS_ENTER(CH3COMM,vc);
676
            mpi_errno = vc->sendNoncontig_fn(vc, *request, iov[0].MPID_IOV_BUF, iov[0].MPID_IOV_LEN);
677
	    MPIU_THREAD_CS_EXIT(CH3COMM,vc);
678
            MPIU_ERR_CHKANDJUMP(mpi_errno, mpi_errno, MPI_ERR_OTHER, "**ch3|rmamsg");
679 680 681 682
        }
    }
    else
    {
683
        /* derived datatype on target */
684
        MPID_Datatype *combined_dtp = NULL;
685 686 687

        *request = MPID_Request_create();
        if (*request == NULL) {
688
	    MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**nomemreq");
689 690 691 692 693 694
        }

        MPIU_Object_set_ref(*request, 2);
        (*request)->kind = MPID_REQUEST_SEND;

	(*request)->dev.segment_ptr = MPID_Segment_alloc( );
695 696 697 698
        MPIU_ERR_CHKANDJUMP1((*request)->dev.segment_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem", "**nomem %s", "MPID_Segment_alloc");

        /* create a new datatype containing the dtype_info, dataloop, and origin data */

699 700
        mpi_errno = create_datatype(dtype_info, *dataloop, target_dtp->dataloop_size, rma_op->origin_addr,
                                    rma_op->origin_count, rma_op->origin_datatype, &combined_dtp);
701
        if (mpi_errno) MPIU_ERR_POP(mpi_errno);
702 703 704 705 706

        (*request)->dev.datatype_ptr = combined_dtp;
        /* combined_datatype will be freed when request is freed */

        MPID_Segment_init(MPI_BOTTOM, 1, combined_dtp->handle,
707 708
                          (*request)->dev.segment_ptr, 0);
        (*request)->dev.segment_first = 0;
709 710 711 712 713
        (*request)->dev.segment_size = combined_dtp->size;

        (*request)->dev.OnFinal = 0;
        (*request)->dev.OnDataAvail = 0;

714
	MPIU_THREAD_CS_ENTER(CH3COMM,vc);
715
        mpi_errno = vc->sendNoncontig_fn(vc, *request, iov[0].MPID_IOV_BUF, iov[0].MPID_IOV_LEN);
716
	MPIU_THREAD_CS_EXIT(CH3COMM,vc);
717
        MPIU_ERR_CHKANDJUMP(mpi_errno, mpi_errno, MPI_ERR_OTHER, "**ch3|rmamsg");
718

719 720 721
        /* we're done with the datatypes */
        if (origin_dt_derived)
            MPID_Datatype_release(origin_dtp);
722
        MPID_Datatype_release(target_dtp);
723
    }    
724 725 726 727 728 729

 fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_CH3I_SEND_RMA_MSG);
    return mpi_errno;
    /* --BEGIN ERROR HANDLING-- */
 fn_fail:
730 731 732
    if (*request)
    {
        MPIU_CHKPMEM_REAP();
733 734
        if ((*request)->dev.datatype_ptr)
            MPID_Datatype_release((*request)->dev.datatype_ptr);
735 736 737 738
        MPIU_Object_set_ref(*request, 0);
        MPIDI_CH3_Request_destroy(*request);
    }
    *request = NULL;
739 740 741 742
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}

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
/*
 * Use this for contiguous accumulate operations
 */
#undef FUNCNAME
#define FUNCNAME MPIDI_CH3I_Send_contig_acc_msg
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
static int MPIDI_CH3I_Send_contig_acc_msg(MPIDI_RMA_ops *rma_op, 
					  MPID_Win *win_ptr,
					  MPI_Win source_win_handle, 
					  MPI_Win target_win_handle, 
					  MPID_Request **request) 
{
    MPIDI_CH3_Pkt_t upkt;
    MPIDI_CH3_Pkt_accum_t *accum_pkt = &upkt.accum;
    MPID_IOV iov[MPID_IOV_LIMIT];
    int mpi_errno=MPI_SUCCESS;
    int origin_type_size, iovcnt; 
    MPIDI_VC_t * vc;
    MPID_Comm *comm_ptr;
    int len;
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_CH3I_SEND_CONTIG_ACC_MSG);
    MPIDI_STATE_DECL(MPID_STATE_MEMCPY);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_CH3I_SEND_CONTIG_ACC_MSG);

    *request = NULL;

    MPID_Datatype_get_size_macro(rma_op->origin_datatype, origin_type_size);
    /* FIXME: Make this size check efficient and match the packet type */
    len = rma_op->origin_count * origin_type_size;
    if (EnableImmedAcc && len <= MPIDI_RMA_IMMED_INTS*sizeof(int)) {
	MPIDI_CH3_Pkt_accum_immed_t * accumi_pkt = &upkt.accum_immed;
	void *dest = accumi_pkt->data, *src = rma_op->origin_addr;
	
	MPIDI_Pkt_init(accumi_pkt, MPIDI_CH3_PKT_ACCUM_IMMED);
	accumi_pkt->addr = (char *) win_ptr->base_addrs[rma_op->target_rank] +
	    win_ptr->disp_units[rma_op->target_rank] * rma_op->target_disp;
	accumi_pkt->count = rma_op->target_count;
	accumi_pkt->datatype = rma_op->target_datatype;
	accumi_pkt->op = rma_op->op;
	accumi_pkt->target_win_handle = target_win_handle;
	accumi_pkt->source_win_handle = source_win_handle;
	
	switch (len) {
	case 1: *(uint8_t *)dest  = *(uint8_t *)src;  break;
	case 2: *(uint16_t *)dest = *(uint16_t *)src; break;
	case 4: *(uint32_t *)dest = *(uint32_t *)src; break;
	case 8: *(uint64_t *)dest = *(uint64_t *)src; break;
	default:
	    MPIU_Memcpy( accumi_pkt->data, (void *)rma_op->origin_addr, len );
	}
	comm_ptr = win_ptr->comm_ptr;
	MPIDI_Comm_get_vc_set_active(comm_ptr, rma_op->target_rank, &vc);
	MPIU_THREAD_CS_ENTER(CH3COMM,vc);
798
	mpi_errno = MPIDI_CH3_iStartMsg(vc, accumi_pkt, sizeof(*accumi_pkt), request);
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
	MPIU_THREAD_CS_EXIT(CH3COMM,vc);
	MPIU_ERR_CHKANDJUMP(mpi_errno, mpi_errno, MPI_ERR_OTHER, "**ch3|rmamsg");
	goto fn_exit;
    }

    MPIDI_Pkt_init(accum_pkt, MPIDI_CH3_PKT_ACCUMULATE);
    accum_pkt->addr = (char *) win_ptr->base_addrs[rma_op->target_rank] +
	win_ptr->disp_units[rma_op->target_rank] * rma_op->target_disp;
    accum_pkt->count = rma_op->target_count;
    accum_pkt->datatype = rma_op->target_datatype;
    accum_pkt->dataloop_size = 0;
    accum_pkt->op = rma_op->op;
    accum_pkt->target_win_handle = target_win_handle;
    accum_pkt->source_win_handle = source_win_handle;
    
    iov[0].MPID_IOV_BUF = (MPID_IOV_BUF_CAST) accum_pkt;
    iov[0].MPID_IOV_LEN = sizeof(*accum_pkt);

    /*    printf("send pkt: type %d, addr %d, count %d, base %d\n", rma_pkt->type,
          rma_pkt->addr, rma_pkt->count, win_ptr->base_addrs[rma_op->target_rank]);
          fflush(stdout);
    */

    comm_ptr = win_ptr->comm_ptr;
    MPIDI_Comm_get_vc_set_active(comm_ptr, rma_op->target_rank, &vc);


    /* basic datatype on target */
    /* basic datatype on origin */
    /* FIXME: This is still very heavyweight for a small message operation,
       such as a single word update */
    /* One possibility is to use iStartMsg with a buffer that is just large 
       enough, though note that nemesis has an optimization for this */
    iov[1].MPID_IOV_BUF = (MPID_IOV_BUF_CAST)rma_op->origin_addr;
    iov[1].MPID_IOV_LEN = rma_op->origin_count * origin_type_size;
    iovcnt = 2;
    MPIU_THREAD_CS_ENTER(CH3COMM,vc);
836
    mpi_errno = MPIDI_CH3_iStartMsgv(vc, iov, iovcnt, request);
837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
    MPIU_THREAD_CS_EXIT(CH3COMM,vc);
    MPIU_ERR_CHKANDJUMP(mpi_errno, mpi_errno, MPI_ERR_OTHER, "**ch3|rmamsg");

 fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_CH3I_SEND_CONTIG_ACC_MSG);
    return mpi_errno;
    /* --BEGIN ERROR HANDLING-- */
 fn_fail:
    if (*request)
    {
        MPIU_Object_set_ref(*request, 0);
        MPIDI_CH3_Request_destroy(*request);
    }
    *request = NULL;
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}

855 856 857 858 859 860 861 862 863 864 865 866 867 868


#undef FUNCNAME
#define FUNCNAME MPIDI_CH3I_Recv_rma_msg
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
static int MPIDI_CH3I_Recv_rma_msg(MPIDI_RMA_ops *rma_op, MPID_Win *win_ptr,
				   MPI_Win source_win_handle, 
				   MPI_Win target_win_handle, 
				   MPIDI_RMA_dtype_info *dtype_info, 
				   void **dataloop, MPID_Request **request) 
{
    MPIDI_CH3_Pkt_t upkt;
    MPIDI_CH3_Pkt_get_t *get_pkt = &upkt.get;
869
    int mpi_errno=MPI_SUCCESS, predefined;
870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
    MPIDI_VC_t * vc;
    MPID_Comm *comm_ptr;
    MPID_Request *req = NULL;
    MPID_Datatype *dtp;
    MPID_IOV iov[MPID_IOV_LIMIT];
    MPIU_CHKPMEM_DECL(1);
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_CH3I_RECV_RMA_MSG);
    MPIDI_STATE_DECL(MPID_STATE_MEMCPY);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_CH3I_RECV_RMA_MSG);

    /* create a request, store the origin buf, cnt, datatype in it,
       and pass a handle to it in the get packet. When the get
       response comes from the target, it will contain the request
       handle. */  
    req = MPID_Request_create();
    if (req == NULL) {
887
	MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**nomemreq");
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
    }

    *request = req;

    MPIU_Object_set_ref(req, 2);

    req->dev.user_buf = rma_op->origin_addr;
    req->dev.user_count = rma_op->origin_count;
    req->dev.datatype = rma_op->origin_datatype;
    req->dev.target_win_handle = MPI_WIN_NULL;
    req->dev.source_win_handle = source_win_handle;
    MPIDI_CH3I_DATATYPE_IS_PREDEFINED(req->dev.datatype, predefined);
    if (!predefined)
    {
        MPID_Datatype_get_ptr(req->dev.datatype, dtp);
        req->dev.datatype_ptr = dtp;
        /* this will cause the datatype to be freed when the
           request is freed. */  
    }

    MPIDI_Pkt_init(get_pkt, MPIDI_CH3_PKT_GET);
    get_pkt->addr = (char *) win_ptr->base_addrs[rma_op->target_rank] +
        win_ptr->disp_units[rma_op->target_rank] * rma_op->target_disp;
    get_pkt->count = rma_op->target_count;
    get_pkt->datatype = rma_op->target_datatype;
    get_pkt->request_handle = req->handle;
    get_pkt->target_win_handle = target_win_handle;
    get_pkt->source_win_handle = source_win_handle;

/*    printf("send pkt: type %d, addr %d, count %d, base %d\n", rma_pkt->type,
           rma_pkt->addr, rma_pkt->count, win_ptr->base_addrs[rma_op->target_rank]);
    fflush(stdout);
*/
	    
922
    comm_ptr = win_ptr->comm_ptr;
923
    MPIDI_Comm_get_vc_set_active(comm_ptr, rma_op->target_rank, &vc);
924 925 926 927 928

    MPIDI_CH3I_DATATYPE_IS_PREDEFINED(rma_op->target_datatype, predefined);
    if (predefined)
    {
        /* basic datatype on target. simply send the get_pkt. */
929
	MPIU_THREAD_CS_ENTER(CH3COMM,vc);
930
        mpi_errno = MPIDI_CH3_iStartMsg(vc, get_pkt, sizeof(*get_pkt), &req);
931
	MPIU_THREAD_CS_EXIT(CH3COMM,vc);
932 933 934 935 936 937 938 939
    }
    else
    {
        /* derived datatype on target. fill derived datatype info and
           send it along with get_pkt. */

        MPID_Datatype_get_ptr(rma_op->target_datatype, dtp);
        dtype_info->is_contig = dtp->is_contig;
940
        dtype_info->max_contig_blocks = dtp->max_contig_blocks;
941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
        dtype_info->size = dtp->size;
        dtype_info->extent = dtp->extent;
        dtype_info->dataloop_size = dtp->dataloop_size;
        dtype_info->dataloop_depth = dtp->dataloop_depth;
        dtype_info->eltype = dtp->eltype;
        dtype_info->dataloop = dtp->dataloop;
        dtype_info->ub = dtp->ub;
        dtype_info->lb = dtp->lb;
        dtype_info->true_ub = dtp->true_ub;
        dtype_info->true_lb = dtp->true_lb;
        dtype_info->has_sticky_ub = dtp->has_sticky_ub;
        dtype_info->has_sticky_lb = dtp->has_sticky_lb;

	MPIU_CHKPMEM_MALLOC(*dataloop, void *, dtp->dataloop_size, 
			    mpi_errno, "dataloop");

	MPIDI_FUNC_ENTER(MPID_STATE_MEMCPY);
958
        MPIU_Memcpy(*dataloop, dtp->dataloop, dtp->dataloop_size);
959 960
	MPIDI_FUNC_EXIT(MPID_STATE_MEMCPY);

961 962
        /* the dataloop can have undefined padding sections, so we need to let
         * valgrind know that it is OK to pass this data to writev later on */
963
        MPL_VG_MAKE_MEM_DEFINED(*dataloop, dtp->dataloop_size);
964

965 966 967 968 969 970 971 972
        get_pkt->dataloop_size = dtp->dataloop_size;

        iov[0].MPID_IOV_BUF = (MPID_IOV_BUF_CAST)get_pkt;
        iov[0].MPID_IOV_LEN = sizeof(*get_pkt);
        iov[1].MPID_IOV_BUF = (MPID_IOV_BUF_CAST)dtype_info;
        iov[1].MPID_IOV_LEN = sizeof(*dtype_info);
        iov[2].MPID_IOV_BUF = (MPID_IOV_BUF_CAST)*dataloop;
        iov[2].MPID_IOV_LEN = dtp->dataloop_size;
973

974
	MPIU_THREAD_CS_ENTER(CH3COMM,vc);
975
        mpi_errno = MPIDI_CH3_iStartMsgv(vc, iov, 3, &req);
976
	MPIU_THREAD_CS_EXIT(CH3COMM,vc);
977 978 979 980 981

        /* release the target datatype */
        MPID_Datatype_release(dtp);
    }

982 983
    if (mpi_errno != MPI_SUCCESS) {
	MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**ch3|rmamsg");
984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
    }

    /* release the request returned by iStartMsg or iStartMsgv */
    if (req != NULL)
    {
        MPID_Request_release(req);
    }

 fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_CH3I_RECV_RMA_MSG);
    return mpi_errno;

    /* --BEGIN ERROR HANDLING-- */
 fn_fail:
    MPIU_CHKPMEM_REAP();
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}


#undef FUNCNAME
#define FUNCNAME MPIDI_Win_post
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
1008
int MPIDI_Win_post(MPID_Group *post_grp_ptr, int assert, MPID_Win *win_ptr)
1009 1010
{
    int mpi_errno=MPI_SUCCESS;
1011
    MPID_Group *win_grp_ptr;
1012
    int i, post_grp_size, *ranks_in_post_grp, *ranks_in_win_grp, dst, rank;
1013
    MPID_Comm *win_comm_ptr;
1014
    MPIU_CHKLMEM_DECL(4);
1015 1016 1017 1018
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_WIN_POST);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_WIN_POST);

1019 1020 1021 1022 1023
    /* Even though we would want to reset the fence counter to keep
     * the user from using the previous fence to mark the beginning of
     * a fence epoch if he switched from fence to lock-unlock
     * synchronization, we cannot do this because fence_cnt must be
     * updated collectively */
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035

    /* In case this process was previously the target of passive target rma
     * operations, we need to take care of the following...
     * Since we allow MPI_Win_unlock to return without a done ack from
     * the target in the case of multiple rma ops and exclusive lock,
     * we need to check whether there is a lock on the window, and if
     * there is a lock, poke the progress engine until the operations
     * have completed and the lock is therefore released. */
    if (win_ptr->current_lock_type != MPID_LOCK_NONE)
    {
	MPID_Progress_state progress_state;
	
1036
	MPIU_INSTR_DURATION_START(winpost_clearlock);
1037 1038 1039 1040 1041 1042
	/* poke the progress engine */
	MPID_Progress_start(&progress_state);
	while (win_ptr->current_lock_type != MPID_LOCK_NONE)
	{
	    mpi_errno = MPID_Progress_wait(&progress_state);
	    /* --BEGIN ERROR HANDLING-- */
1043
	    if (mpi_errno != MPI_SUCCESS) {
1044
		MPID_Progress_end(&progress_state);
1045
		MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winnoprogress");
1046 1047
	    }
	    /* --END ERROR HANDLING-- */
1048
	    MPIU_INSTR_DURATION_INCR(winpost_clearlock,0,1);
1049 1050
	}
	MPID_Progress_end(&progress_state);
1051
	MPIU_INSTR_DURATION_END(winpost_clearlock);
1052 1053
    }
        
1054
    post_grp_size = post_grp_ptr->size;
1055 1056 1057 1058 1059 1060
        
    /* initialize the completion counter */
    win_ptr->my_counter = post_grp_size;
        
    if ((assert & MPI_MODE_NOCHECK) == 0)
    {
1061 1062
        MPI_Request *req;
        MPI_Status *status;
1063 1064

	MPIU_INSTR_DURATION_START(winpost_sendsync);
1065
 
1066 1067 1068 1069
	/* NOCHECK not specified. We need to notify the source
	   processes that Post has been called. */  
	
	/* We need to translate the ranks of the processes in
1070
	   post_group to ranks in win_ptr->comm_ptr, so that we
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
	   can do communication */
            
	MPIU_CHKLMEM_MALLOC(ranks_in_post_grp, int *, 
			    post_grp_size * sizeof(int),
			    mpi_errno, "ranks_in_post_grp");
	MPIU_CHKLMEM_MALLOC(ranks_in_win_grp, int *, 
			    post_grp_size * sizeof(int),
			    mpi_errno, "ranks_in_win_grp");
        
	for (i=0; i<post_grp_size; i++)
	{
	    ranks_in_post_grp[i] = i;
	}
        
1085
	win_comm_ptr = win_ptr->comm_ptr;
1086 1087 1088

        mpi_errno = MPIR_Comm_group_impl(win_comm_ptr, &win_grp_ptr);
	if (mpi_errno) MPIU_ERR_POP(mpi_errno);
1089
	
1090

1091 1092 1093
        mpi_errno = MPIR_Group_translate_ranks_impl(post_grp_ptr, post_grp_size, ranks_in_post_grp,
                                                    win_grp_ptr, ranks_in_win_grp);
        if (mpi_errno) MPIU_ERR_POP(mpi_errno);
1094
	
1095
        rank = win_ptr->myrank;
1096
	
1097 1098 1099
	MPIU_CHKLMEM_MALLOC(req, MPI_Request *, post_grp_size * sizeof(MPI_Request), mpi_errno, "req");
        MPIU_CHKLMEM_MALLOC(status, MPI_Status *, post_grp_size*sizeof(MPI_Status), mpi_errno, "status");

1100
	/* Send a 0-byte message to the source processes */
1101
	MPIU_INSTR_DURATION_INCR(winpost_sendsync,0,post_grp_size);
1102
	for (i = 0; i < post_grp_size; i++) {
1103
	    dst = ranks_in_win_grp[i];
1104 1105 1106 1107 1108

	    /* FIXME: Short messages like this shouldn't normally need a 
	       request - this should consider using the ch3 call to send
	       a short message and return a request only if the message is
	       not delivered. */
1109
	    if (dst != rank) {
1110 1111 1112 1113 1114 1115 1116 1117
                MPID_Request *req_ptr;
		mpi_errno = MPID_Isend(&i, 0, MPI_INT, dst, SYNC_POST_TAG, win_comm_ptr,
                                       MPID_CONTEXT_INTRA_PT2PT, &req_ptr);
		if (mpi_errno) MPIU_ERR_POP(mpi_errno);
                req[i] = req_ptr->handle;
	    } else {
                req[i] = MPI_REQUEST_NULL;
            }
1118
	}
1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
        mpi_errno = MPIR_Waitall_impl(post_grp_size, req, status);
        if (mpi_errno && mpi_errno != MPI_ERR_IN_STATUS) MPIU_ERR_POP(mpi_errno);

        /* --BEGIN ERROR HANDLING-- */
        if (mpi_errno == MPI_ERR_IN_STATUS) {
            for (i = 0; i < post_grp_size; i++) {
                if (status[i].MPI_ERROR != MPI_SUCCESS) {
                    mpi_errno = status[i].MPI_ERROR;
                    MPIU_ERR_POP(mpi_errno);
                }
            }
        }
        /* --END ERROR HANDLING-- */
1132 1133 1134

        mpi_errno = MPIR_Group_free_impl(win_grp_ptr);
	if (mpi_errno) MPIU_ERR_POP(mpi_errno);
1135
	MPIU_INSTR_DURATION_END(winpost_sendsync);
1136
    }
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160

 fn_exit:
    MPIU_CHKLMEM_FREEALL();
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_WIN_POST);
    return mpi_errno;
    /* --BEGIN ERROR HANDLING-- */
 fn_fail:
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}



#undef FUNCNAME
#define FUNCNAME MPIDI_Win_start
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
int MPIDI_Win_start(MPID_Group *group_ptr, int assert, MPID_Win *win_ptr)
{
    int mpi_errno=MPI_SUCCESS;
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_WIN_START);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_WIN_START);

1161 1162 1163 1164 1165
    /* Even though we would want to reset the fence counter to keep
     * the user from using the previous fence to mark the beginning of
     * a fence epoch if he switched from fence to lock-unlock
     * synchronization, we cannot do this because fence_cnt must be
     * updated collectively */
1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177

    /* In case this process was previously the target of passive target rma
     * operations, we need to take care of the following...
     * Since we allow MPI_Win_unlock to return without a done ack from
     * the target in the case of multiple rma ops and exclusive lock,
     * we need to check whether there is a lock on the window, and if
     * there is a lock, poke the progress engine until the operations
     * have completed and the lock is therefore released. */
    if (win_ptr->current_lock_type != MPID_LOCK_NONE)
    {
	MPID_Progress_state progress_state;
	
1178
	MPIU_INSTR_DURATION_START(winstart_clearlock);
1179 1180 1181 1182 1183 1184
	/* poke the progress engine */
	MPID_Progress_start(&progress_state);
	while (win_ptr->current_lock_type != MPID_LOCK_NONE)
	{
	    mpi_errno = MPID_Progress_wait(&progress_state);
	    /* --BEGIN ERROR HANDLING-- */
1185
	    if (mpi_errno != MPI_SUCCESS) {
1186
		MPID_Progress_end(&progress_state);
1187
		MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**winnoprogress");
1188 1189
	    }
	    /* --END ERROR HANDLING-- */
1190
	    MPIU_INSTR_DURATION_INCR(winstart_clearlock,0,1);
1191 1192
	}
	MPID_Progress_end(&progress_state);
1193
	MPIU_INSTR_DURATION_END(winstart_clearlock);
1194 1195 1196 1197 1198
    }
    
    win_ptr->start_group_ptr = group_ptr;
    MPIR_Group_add_ref( group_ptr );
    win_ptr->start_assert = assert;
1199 1200

 fn_fail:
1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_WIN_START);
    return mpi_errno;
}



#undef FUNCNAME
#define FUNCNAME MPIDI_Win_complete
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
int MPIDI_Win_complete(MPID_Win *win_ptr)
{
    int mpi_errno = MPI_SUCCESS;
    int comm_size, *nops_to_proc, src, new_total_op_count;
1215
    int i, j, dst, total_op_count, *curr_ops_cnt;
1216
    MPIDI_RMA_ops *curr_ptr, *tmpptr, **prevNextPtr;
1217 1218
    MPID_Comm *comm_ptr;
    MPI_Win source_win_handle, target_win_handle;
1219
    MPID_Group *win_grp_ptr;
1220
    int start_grp_size, *ranks_in_start_grp, *ranks_in_win_grp, rank;
1221
    MPIU_CHKLMEM_DECL(9);
1222 1223 1224 1225
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_WIN_COMPLETE);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_WIN_COMPLETE);

1226
    comm_ptr = win_ptr->comm_ptr;
1227 1228 1229
    comm_size = comm_ptr->local_size;
        
    /* Translate the ranks of the processes in
1230
       start_group to ranks in win_ptr->comm_ptr */
1231 1232
    
    start_grp_size = win_ptr->start_group_ptr->size;
1233 1234

    MPIU_INSTR_DURATION_START(wincomplete_recvsync);
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
    MPIU_CHKLMEM_MALLOC(ranks_in_start_grp, int *, start_grp_size*sizeof(int), 
			mpi_errno, "ranks_in_start_grp");
        
    MPIU_CHKLMEM_MALLOC(ranks_in_win_grp, int *, start_grp_size*sizeof(int), 
			mpi_errno, "ranks_in_win_grp");
        
    for (i=0; i<start_grp_size; i++)
    {
	ranks_in_start_grp[i] = i;
    }
        
1246 1247 1248
    mpi_errno = MPIR_Comm_group_impl(comm_ptr, &win_grp_ptr);
    if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }

1249 1250 1251 1252 1253
    mpi_errno = MPIR_Group_translate_ranks_impl(win_ptr->start_group_ptr, start_grp_size,
                                                ranks_in_start_grp,
                                                win_grp_ptr, ranks_in_win_grp);
    if (mpi_errno) MPIU_ERR_POP(mpi_errno);

1254
    rank = win_ptr->myrank;
1255

1256 1257 1258 1259 1260
    /* If MPI_MODE_NOCHECK was not specified, we need to check if
       Win_post was called on the target processes. Wait for a 0-byte sync
       message from each target process */
    if ((win_ptr->start_assert & MPI_MODE_NOCHECK) == 0)
    {