ch3u_rma_ops.c 43.5 KB
Newer Older
1
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
2 3 4 5 6 7 8
/*
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpidrma.h"

Xin Zhao's avatar
Xin Zhao committed
9 10
MPIR_T_PVAR_DOUBLE_TIMER_DECL_EXTERN(RMA, rma_rmaqueue_set);

11 12 13
#define MPIDI_PASSIVE_TARGET_DONE_TAG  348297
#define MPIDI_PASSIVE_TARGET_RMA_TAG 563924

14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
/*
=== BEGIN_MPI_T_CVAR_INFO_BLOCK ===

cvars:
    - name        : MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS
      category    : CH3
      type        : int
      default     : 100
      class       : none
      verbosity   : MPI_T_VERBOSITY_USER_BASIC
      scope       : MPI_T_SCOPE_ALL_EQ
      description : >-
          Specify the threshold of number of posted operations
          when starting poking progress in operation routines.
          When the value is negative, runtime never pokes progress
          engine in operation routines; when the value is zero,
          runtime always pokes progress engine in operation
          routines; when the value is larger than zero, runtime
          starts to poke progress engine when number of posted
          operations reaches that value.

=== END_MPI_T_CVAR_INFO_BLOCK ===
*/

38 39 40 41
#undef FUNCNAME
#define FUNCNAME MPIDI_Put
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
42
int MPIDI_Put(const void *origin_addr, int origin_count, MPI_Datatype
43
              origin_datatype, int target_rank, MPI_Aint target_disp,
44 45
              int target_count, MPI_Datatype target_datatype, MPID_Win * win_ptr,
              MPID_Request * ureq)
46 47
{
    int mpi_errno = MPI_SUCCESS;
48
    int dt_contig ATTRIBUTE((unused)), rank;
49
    MPID_Datatype *dtp;
Pavan Balaji's avatar
Pavan Balaji committed
50
    MPI_Aint dt_true_lb ATTRIBUTE((unused));
51
    MPIDI_msg_sz_t data_sz;
52
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
53
    int made_progress = 0;
54
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_PUT);
55

56 57
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_PUT);

58 59 60
    MPIU_ERR_CHKANDJUMP(win_ptr->states.access_state == MPIDI_RMA_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

61 62 63 64
    if (target_rank == MPI_PROC_NULL) {
        goto fn_exit;
    }

65 66
    MPIDI_Datatype_get_info(origin_count, origin_datatype, dt_contig, data_sz, dtp, dt_true_lb);

67
    if (data_sz == 0) {
68
        goto fn_exit;
69 70
    }

71
    rank = win_ptr->comm_ptr->rank;
72 73 74

    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
Xin Zhao's avatar
Xin Zhao committed
75
        /* check if target is local and shared memory is allocated on window,
76
         * if so, we directly perform this operation on shared memory region. */
Xin Zhao's avatar
Xin Zhao committed
77 78

        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
79 80 81 82 83
         * the same node. However, in ch3:sock, even if origin and target are on the same node, they do
         * not within the same SHM region. Here we filter out ch3:sock by checking shm_allocated flag first,
         * which is only set to TRUE when SHM region is allocated in nemesis.
         * In future we need to figure out a way to check if origin and target are in the same "SHM comm".
         */
Xin Zhao's avatar
Xin Zhao committed
84 85 86 87
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }

88
    /* If the put is a local operation, do it here */
Xin Zhao's avatar
Xin Zhao committed
89
    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
90
        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
91 92
        mpi_errno = MPIDI_CH3I_Shm_put_op(origin_addr, origin_count, origin_datatype, target_rank,
                                          target_disp, target_count, target_datatype, win_ptr);
93 94
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
95 96 97 98 99 100

        if (ureq) {
            /* Complete user request and release the ch3 ref */
            MPID_Request_set_completed(ureq);
            MPID_Request_release(ureq);
        }
101
    }
102
    else {
103
        MPIDI_RMA_Op_t *new_ptr = NULL;
104
        MPIDI_CH3_Pkt_put_t *put_pkt = NULL;
105

106
        /* queue it up */
107 108
        mpi_errno = MPIDI_CH3I_Win_get_op(win_ptr, &new_ptr);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
109

Xin Zhao's avatar
Xin Zhao committed
110 111
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

112 113 114 115 116 117 118 119 120
        put_pkt = &(new_ptr->pkt.put);
        MPIDI_Pkt_init(put_pkt, MPIDI_CH3_PKT_PUT);
        put_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
            win_ptr->disp_units[target_rank] * target_disp;
        put_pkt->count = target_count;
        put_pkt->datatype = target_datatype;
        put_pkt->dataloop_size = 0;
        put_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
        put_pkt->source_win_handle = win_ptr->handle;
Xin Zhao's avatar
Xin Zhao committed
121
        put_pkt->immed_len = 0;
122
        put_pkt->origin_rank = rank;
123

124 125 126 127 128
        /* FIXME: For contig and very short operations, use a streamlined op */
        new_ptr->origin_addr = (void *) origin_addr;
        new_ptr->origin_count = origin_count;
        new_ptr->origin_datatype = origin_datatype;
        new_ptr->target_rank = target_rank;
129 130 131 132 133 134
        new_ptr->ureq = NULL; /* reset user request */

        /* Remember user request */
        if (ureq) {
            new_ptr->ureq = ureq;
        }
135

Xin Zhao's avatar
Xin Zhao committed
136 137
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

138 139 140 141
        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

Xin Zhao's avatar
Xin Zhao committed
142 143
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

144 145 146 147 148
        /* if source or target datatypes are derived, increment their
         * reference counts */
        if (!MPIR_DATATYPE_IS_PREDEFINED(origin_datatype)) {
            MPID_Datatype_get_ptr(origin_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
149
            new_ptr->is_dt = 1;
150 151 152 153
        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
154
            new_ptr->is_dt = 1;
155
        }
156

Xin Zhao's avatar
Xin Zhao committed
157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175
        /* If both origin and target are basic datatype, try to
           copy origin data to packet header as much as possible. */
        if (!new_ptr->is_dt) {
            size_t len;
            MPI_Aint origin_type_size;

            MPID_Datatype_get_size_macro(new_ptr->origin_datatype, origin_type_size);
            /* length of origin data */
            MPIU_Assign_trunc(len, new_ptr->origin_count * origin_type_size, size_t);
            /* length of origin data that can fit into immed area in pkt header */
            MPIU_Assign_trunc(put_pkt->immed_len,
                              MPIR_MIN(len, (MPIDI_RMA_IMMED_BYTES / origin_type_size) * origin_type_size),
                              size_t);

            if (put_pkt->immed_len > 0) {
                void *src = new_ptr->origin_addr, *dest = put_pkt->data;
                /* copy data from origin buffer to immed area in packet header */
                mpi_errno = immed_copy(src, dest, put_pkt->immed_len);
                if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
176 177 178 179 180

                /* If all data is in pkt header, mark this op as a candidate
                   for piggybacking LOCK. */
                if (put_pkt->immed_len == len)
                    new_ptr->piggyback_lock_candidate = 1;
Xin Zhao's avatar
Xin Zhao committed
181 182 183
            }
        }

Xin Zhao's avatar
Xin Zhao committed
184 185
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

186 187 188 189 190 191 192 193 194 195
        mpi_errno = MPIDI_CH3I_RMA_Make_progress_target(win_ptr, target_rank, &made_progress);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);

        win_ptr->posted_ops_cnt++;
        if (MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS >= 0 &&
            win_ptr->posted_ops_cnt >= MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS) {
            mpi_errno = poke_progress_engine();
            if (mpi_errno != MPI_SUCCESS)
                MPIU_ERR_POP(mpi_errno);
        }
196 197 198 199 200 201 202 203 204 205 206 207 208 209

        if (MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD >= 0 &&
            win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
            while (win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
                int local_completed = 0, remote_completed = 0;
                mpi_errno = MPIDI_CH3I_RMA_Cleanup_ops_win(win_ptr, &local_completed,
                                                           &remote_completed);
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
                mpi_errno = poke_progress_engine();
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
            }
        }
210 211 212
    }

  fn_exit:
213
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_PUT);
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
    return mpi_errno;

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



#undef FUNCNAME
#define FUNCNAME MPIDI_Get
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
int MPIDI_Get(void *origin_addr, int origin_count, MPI_Datatype
229
              origin_datatype, int target_rank, MPI_Aint target_disp,
230 231
              int target_count, MPI_Datatype target_datatype, MPID_Win * win_ptr,
              MPID_Request * ureq)
232 233 234
{
    int mpi_errno = MPI_SUCCESS;
    MPIDI_msg_sz_t data_sz;
235
    int dt_contig ATTRIBUTE((unused)), rank;
Pavan Balaji's avatar
Pavan Balaji committed
236
    MPI_Aint dt_true_lb ATTRIBUTE((unused));
237
    MPID_Datatype *dtp;
238
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
239
    int made_progress = 0;
240
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_GET);
241

242 243
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_GET);

244 245 246
    MPIU_ERR_CHKANDJUMP(win_ptr->states.access_state == MPIDI_RMA_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

247 248 249 250
    if (target_rank == MPI_PROC_NULL) {
        goto fn_exit;
    }

251
    MPIDI_Datatype_get_info(origin_count, origin_datatype, dt_contig, data_sz, dtp, dt_true_lb);
252

253
    if (data_sz == 0) {
254
        goto fn_exit;
255 256
    }

257
    rank = win_ptr->comm_ptr->rank;
Xin Zhao's avatar
Xin Zhao committed
258

259 260
    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
Xin Zhao's avatar
Xin Zhao committed
261
        /* check if target is local and shared memory is allocated on window,
262
         * if so, we directly perform this operation on shared memory region. */
Xin Zhao's avatar
Xin Zhao committed
263 264

        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
265 266 267 268 269
         * the same node. However, in ch3:sock, even if origin and target are on the same node, they do
         * not within the same SHM region. Here we filter out ch3:sock by checking shm_allocated flag first,
         * which is only set to TRUE when SHM region is allocated in nemesis.
         * In future we need to figure out a way to check if origin and target are in the same "SHM comm".
         */
Xin Zhao's avatar
Xin Zhao committed
270 271 272
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }
273

274
    /* If the get is a local operation, do it here */
Xin Zhao's avatar
Xin Zhao committed
275
    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
276
        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
277 278
        mpi_errno = MPIDI_CH3I_Shm_get_op(origin_addr, origin_count, origin_datatype, target_rank,
                                          target_disp, target_count, target_datatype, win_ptr);
279 280
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
281 282 283 284 285 286

        if (ureq) {
            /* Complete user request and release the ch3 ref */
            MPID_Request_set_completed(ureq);
            MPID_Request_release(ureq);
        }
287
    }
288
    else {
289
        MPIDI_RMA_Op_t *new_ptr = NULL;
290
        MPIDI_CH3_Pkt_get_t *get_pkt = NULL;
291

292
        /* queue it up */
293 294
        mpi_errno = MPIDI_CH3I_Win_get_op(win_ptr, &new_ptr);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
295

Xin Zhao's avatar
Xin Zhao committed
296 297
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

298 299 300 301 302 303 304 305 306
        get_pkt = &(new_ptr->pkt.get);
        MPIDI_Pkt_init(get_pkt, MPIDI_CH3_PKT_GET);
        get_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
            win_ptr->disp_units[target_rank] * target_disp;
        get_pkt->count = target_count;
        get_pkt->datatype = target_datatype;
        get_pkt->dataloop_size = 0;
        get_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
        get_pkt->source_win_handle = win_ptr->handle;
307
        get_pkt->origin_rank = rank;
308

309 310 311 312 313
        /* FIXME: For contig and very short operations, use a streamlined op */
        new_ptr->origin_addr = origin_addr;
        new_ptr->origin_count = origin_count;
        new_ptr->origin_datatype = origin_datatype;
        new_ptr->target_rank = target_rank;
314 315 316 317 318 319
        new_ptr->ureq = NULL; /* reset user request */

        /* Remember user request */
        if (ureq) {
            new_ptr->ureq = ureq;
        }
320

Xin Zhao's avatar
Xin Zhao committed
321 322
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

323 324 325 326
        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

Xin Zhao's avatar
Xin Zhao committed
327 328
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

329 330 331 332 333
        /* if source or target datatypes are derived, increment their
         * reference counts */
        if (!MPIR_DATATYPE_IS_PREDEFINED(origin_datatype)) {
            MPID_Datatype_get_ptr(origin_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
334
            new_ptr->is_dt = 1;
335 336 337 338
        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
339
            new_ptr->is_dt = 1;
340
        }
341

342 343 344 345
        if (!new_ptr->is_dt) {
            new_ptr->piggyback_lock_candidate = 1;
        }

Xin Zhao's avatar
Xin Zhao committed
346 347
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

348 349 350 351 352 353 354 355 356 357
        mpi_errno = MPIDI_CH3I_RMA_Make_progress_target(win_ptr, target_rank, &made_progress);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);

        win_ptr->posted_ops_cnt++;
        if (MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS >= 0 &&
            win_ptr->posted_ops_cnt >= MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS) {
            mpi_errno = poke_progress_engine();
            if (mpi_errno != MPI_SUCCESS)
                MPIU_ERR_POP(mpi_errno);
        }
358 359 360 361 362 363 364 365 366 367 368 369 370 371

        if (MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD >= 0 &&
            win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
            while (win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
                int local_completed = 0, remote_completed = 0;
                mpi_errno = MPIDI_CH3I_RMA_Cleanup_ops_win(win_ptr, &local_completed,
                                                           &remote_completed);
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
                mpi_errno = poke_progress_engine();
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
            }
        }
372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
    }

  fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_GET);
    return mpi_errno;

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



#undef FUNCNAME
#define FUNCNAME MPIDI_Accumulate
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
390
int MPIDI_Accumulate(const void *origin_addr, int origin_count, MPI_Datatype
391
                     origin_datatype, int target_rank, MPI_Aint target_disp,
392 393
                     int target_count, MPI_Datatype target_datatype, MPI_Op op,
                     MPID_Win * win_ptr, MPID_Request * ureq)
394
{
395
    int mpi_errno = MPI_SUCCESS;
396
    MPIDI_msg_sz_t data_sz;
397
    int dt_contig ATTRIBUTE((unused)), rank;
Pavan Balaji's avatar
Pavan Balaji committed
398
    MPI_Aint dt_true_lb ATTRIBUTE((unused));
399
    MPID_Datatype *dtp;
400
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
401
    int made_progress = 0;
402
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_ACCUMULATE);
403

404 405
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_ACCUMULATE);

406 407 408
    MPIU_ERR_CHKANDJUMP(win_ptr->states.access_state == MPIDI_RMA_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

409 410 411 412
    if (target_rank == MPI_PROC_NULL) {
        goto fn_exit;
    }

413 414
    MPIDI_Datatype_get_info(origin_count, origin_datatype, dt_contig, data_sz, dtp, dt_true_lb);

415
    if (data_sz == 0) {
416
        goto fn_exit;
417
    }
418

419
    rank = win_ptr->comm_ptr->rank;
420 421 422

    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
Xin Zhao's avatar
Xin Zhao committed
423
        /* check if target is local and shared memory is allocated on window,
424
         * if so, we directly perform this operation on shared memory region. */
Xin Zhao's avatar
Xin Zhao committed
425 426

        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
427 428 429 430 431
         * the same node. However, in ch3:sock, even if origin and target are on the same node, they do
         * not within the same SHM region. Here we filter out ch3:sock by checking shm_allocated flag first,
         * which is only set to TRUE when SHM region is allocated in nemesis.
         * In future we need to figure out a way to check if origin and target are in the same "SHM comm".
         */
Xin Zhao's avatar
Xin Zhao committed
432 433 434 435
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }

436
    /* Do =! rank first (most likely branch?) */
Xin Zhao's avatar
Xin Zhao committed
437
    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
438 439 440 441 442 443
        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
        mpi_errno = MPIDI_CH3I_Shm_acc_op(origin_addr, origin_count, origin_datatype,
                                          target_rank, target_disp, target_count, target_datatype,
                                          op, win_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
444 445 446 447 448 449

        if (ureq) {
            /* Complete user request and release the ch3 ref */
            MPID_Request_set_completed(ureq);
            MPID_Request_release(ureq);
        }
450
    }
451
    else {
452
        MPIDI_RMA_Op_t *new_ptr = NULL;
453
        MPIDI_CH3_Pkt_accum_t *accum_pkt = NULL;
454

455
        /* queue it up */
456 457
        mpi_errno = MPIDI_CH3I_Win_get_op(win_ptr, &new_ptr);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
458

Xin Zhao's avatar
Xin Zhao committed
459 460
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

461 462 463 464 465 466 467 468 469 470 471
        accum_pkt = &(new_ptr->pkt.accum);

        MPIDI_Pkt_init(accum_pkt, MPIDI_CH3_PKT_ACCUMULATE);
        accum_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
            win_ptr->disp_units[target_rank] * target_disp;
        accum_pkt->count = target_count;
        accum_pkt->datatype = target_datatype;
        accum_pkt->dataloop_size = 0;
        accum_pkt->op = op;
        accum_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
        accum_pkt->source_win_handle = win_ptr->handle;
Xin Zhao's avatar
Xin Zhao committed
472
        accum_pkt->immed_len = 0;
473
        accum_pkt->origin_rank = rank;
474

475 476 477 478
        new_ptr->origin_addr = (void *) origin_addr;
        new_ptr->origin_count = origin_count;
        new_ptr->origin_datatype = origin_datatype;
        new_ptr->target_rank = target_rank;
479 480 481 482 483 484
        new_ptr->ureq = NULL; /* reset user request */

        /* Remember user request */
        if (ureq) {
            new_ptr->ureq = ureq;
        }
485

Xin Zhao's avatar
Xin Zhao committed
486 487
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

488 489 490 491
        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

Xin Zhao's avatar
Xin Zhao committed
492 493
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

494 495 496 497 498
        /* if source or target datatypes are derived, increment their
         * reference counts */
        if (!MPIR_DATATYPE_IS_PREDEFINED(origin_datatype)) {
            MPID_Datatype_get_ptr(origin_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
499
            new_ptr->is_dt = 1;
500 501 502 503
        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
504
            new_ptr->is_dt = 1;
505
        }
506

Xin Zhao's avatar
Xin Zhao committed
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
        /* If both origin and target are basic datatype, try to
           copy origin data to packet header as much as possible. */
        if (!new_ptr->is_dt) {
            size_t len;
            MPI_Aint origin_type_size;

            MPID_Datatype_get_size_macro(new_ptr->origin_datatype, origin_type_size);
            /* length of origin data */
            MPIU_Assign_trunc(len, new_ptr->origin_count * origin_type_size, size_t);
            /* length of origin data that can fit into immed areas in packet header */
            MPIU_Assign_trunc(accum_pkt->immed_len,
                              MPIR_MIN(len, (MPIDI_RMA_IMMED_BYTES / origin_type_size) * origin_type_size),
                              size_t);

            if (accum_pkt->immed_len > 0) {
                void *src = new_ptr->origin_addr, *dest = accum_pkt->data;
                /* copy data from origin buffer to immed area in packet header */
                mpi_errno = immed_copy(src, dest, accum_pkt->immed_len);
                if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
526 527 528 529 530

                /* If all data is in pkt header, mark this op as
                   a candidate for piggybacking LOCK. */
                if (accum_pkt->immed_len == len)
                    new_ptr->piggyback_lock_candidate = 1;
Xin Zhao's avatar
Xin Zhao committed
531 532 533
            }
        }

Xin Zhao's avatar
Xin Zhao committed
534 535
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

536 537 538 539 540 541 542 543 544 545
        mpi_errno = MPIDI_CH3I_RMA_Make_progress_target(win_ptr, target_rank, &made_progress);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);

        win_ptr->posted_ops_cnt++;
        if (MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS >= 0 &&
            win_ptr->posted_ops_cnt >= MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS) {
            mpi_errno = poke_progress_engine();
            if (mpi_errno != MPI_SUCCESS)
                MPIU_ERR_POP(mpi_errno);
        }
546 547 548 549 550 551 552 553 554 555 556 557 558 559

        if (MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD >= 0 &&
            win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
            while (win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
                int local_completed = 0, remote_completed = 0;
                mpi_errno = MPIDI_CH3I_RMA_Cleanup_ops_win(win_ptr, &local_completed,
                                                           &remote_completed);
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
                mpi_errno = poke_progress_engine();
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
            }
        }
560 561
    }

562
  fn_exit:
563 564 565 566 567 568 569 570 571 572 573
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_ACCUMULATE);
    return mpi_errno;

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


#undef FUNCNAME
574 575 576 577 578 579 580
#define FUNCNAME MPIDI_Get_accumulate
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
int MPIDI_Get_accumulate(const void *origin_addr, int origin_count,
                         MPI_Datatype origin_datatype, void *result_addr, int result_count,
                         MPI_Datatype result_datatype, int target_rank, MPI_Aint target_disp,
                         int target_count, MPI_Datatype target_datatype, MPI_Op op,
581
                         MPID_Win * win_ptr, MPID_Request * ureq)
582 583 584 585 586 587 588 589
{
    int mpi_errno = MPI_SUCCESS;
    MPIDI_msg_sz_t data_sz;
    int rank;
    int dt_contig ATTRIBUTE((unused));
    MPI_Aint dt_true_lb ATTRIBUTE((unused));
    MPID_Datatype *dtp;
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
590
    int made_progress = 0;
591 592 593 594
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_GET_ACCUMULATE);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_GET_ACCUMULATE);

595 596 597
    MPIU_ERR_CHKANDJUMP(win_ptr->states.access_state == MPIDI_RMA_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

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
    if (target_rank == MPI_PROC_NULL) {
        goto fn_exit;
    }

    MPIDI_Datatype_get_info(target_count, target_datatype, dt_contig, data_sz, dtp, dt_true_lb);

    if (data_sz == 0) {
        goto fn_exit;
    }

    rank = win_ptr->comm_ptr->rank;

    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
        /* check if target is local and shared memory is allocated on window,
         * if so, we directly perform this operation on shared memory region. */

        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
         * the same node. However, in ch3:sock, even if origin and target are on the same node, they do
         * not within the same SHM region. Here we filter out ch3:sock by checking shm_allocated flag first,
         * which is only set to TRUE when SHM region is allocated in nemesis.
         * In future we need to figure out a way to check if origin and target are in the same "SHM comm".
         */
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }

    /* Do =! rank first (most likely branch?) */
    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
        mpi_errno = MPIDI_CH3I_Shm_get_acc_op(origin_addr, origin_count, origin_datatype,
                                              result_addr, result_count, result_datatype,
                                              target_rank, target_disp, target_count,
                                              target_datatype, op, win_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
634 635 636 637 638 639

        if (ureq) {
            /* Complete user request and release the ch3 ref */
            MPID_Request_set_completed(ureq);
            MPID_Request_release(ureq);
        }
640 641 642 643 644
    }
    else {
        MPIDI_RMA_Op_t *new_ptr = NULL;

        /* Append the operation to the window's RMA ops queue */
645 646
        mpi_errno = MPIDI_CH3I_Win_get_op(win_ptr, &new_ptr);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
647 648 649

        /* TODO: Can we use the MPIDI_RMA_ACC_CONTIG optimization? */

Xin Zhao's avatar
Xin Zhao committed
650 651
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

652 653 654 655 656 657 658 659 660 661 662
        if (op == MPI_NO_OP) {
            /* Convert GAcc to a Get */
            MPIDI_CH3_Pkt_get_t *get_pkt = &(new_ptr->pkt.get);
            MPIDI_Pkt_init(get_pkt, MPIDI_CH3_PKT_GET);
            get_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
                win_ptr->disp_units[target_rank] * target_disp;
            get_pkt->count = target_count;
            get_pkt->datatype = target_datatype;
            get_pkt->dataloop_size = 0;
            get_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
            get_pkt->source_win_handle = win_ptr->handle;
663
            get_pkt->origin_rank = rank;
664 665 666 667 668

            new_ptr->origin_addr = result_addr;
            new_ptr->origin_count = result_count;
            new_ptr->origin_datatype = result_datatype;
            new_ptr->target_rank = target_rank;
669 670 671 672 673 674 675 676 677 678 679

            if (!MPIR_DATATYPE_IS_PREDEFINED(result_datatype)) {
                MPID_Datatype_get_ptr(result_datatype, dtp);
                MPID_Datatype_add_ref(dtp);
                new_ptr->is_dt = 1;
            }
            if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
                MPID_Datatype_get_ptr(target_datatype, dtp);
                MPID_Datatype_add_ref(dtp);
                new_ptr->is_dt = 1;
            }
680 681 682 683

            if (!new_ptr->is_dt) {
                new_ptr->piggyback_lock_candidate = 1;
            }
684 685 686
        }

        else {
Xin Zhao's avatar
Xin Zhao committed
687 688 689
            MPIDI_CH3_Pkt_get_accum_t *get_accum_pkt = &(new_ptr->pkt.get_accum);
            MPIDI_Pkt_init(get_accum_pkt, MPIDI_CH3_PKT_GET_ACCUM);
            get_accum_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
690
                win_ptr->disp_units[target_rank] * target_disp;
Xin Zhao's avatar
Xin Zhao committed
691 692 693 694 695 696
            get_accum_pkt->count = target_count;
            get_accum_pkt->datatype = target_datatype;
            get_accum_pkt->dataloop_size = 0;
            get_accum_pkt->op = op;
            get_accum_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
            get_accum_pkt->source_win_handle = win_ptr->handle;
Xin Zhao's avatar
Xin Zhao committed
697
            get_accum_pkt->immed_len = 0;
698
            get_accum_pkt->origin_rank = rank;
699 700 701 702 703 704 705 706

            new_ptr->origin_addr = (void *) origin_addr;
            new_ptr->origin_count = origin_count;
            new_ptr->origin_datatype = origin_datatype;
            new_ptr->result_addr = result_addr;
            new_ptr->result_count = result_count;
            new_ptr->result_datatype = result_datatype;
            new_ptr->target_rank = target_rank;
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724

            /* if source or target datatypes are derived, increment their
             * reference counts */
            if (!MPIR_DATATYPE_IS_PREDEFINED(origin_datatype)) {
                MPID_Datatype_get_ptr(origin_datatype, dtp);
                MPID_Datatype_add_ref(dtp);
                new_ptr->is_dt = 1;
            }
            if (!MPIR_DATATYPE_IS_PREDEFINED(result_datatype)) {
                MPID_Datatype_get_ptr(result_datatype, dtp);
                MPID_Datatype_add_ref(dtp);
                new_ptr->is_dt = 1;
            }
            if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
                MPID_Datatype_get_ptr(target_datatype, dtp);
                MPID_Datatype_add_ref(dtp);
                new_ptr->is_dt = 1;
            }
Xin Zhao's avatar
Xin Zhao committed
725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744

            /* If all buffers are basic datatype, try to copy origin data to
               packet header as much as possible. */
            if (!new_ptr->is_dt) {
                size_t len;
                MPI_Aint origin_type_size;

                MPID_Datatype_get_size_macro(new_ptr->origin_datatype, origin_type_size);
                /* length of origin data */
                MPIU_Assign_trunc(len, new_ptr->origin_count * origin_type_size, size_t);
                /* length of origin data that can fit into immed area in packet header */
                MPIU_Assign_trunc(get_accum_pkt->immed_len,
                                  MPIR_MIN(len, (MPIDI_RMA_IMMED_BYTES / origin_type_size) * origin_type_size),
                                  size_t);

                if (get_accum_pkt->immed_len > 0) {
                    void *src = new_ptr->origin_addr, *dest = get_accum_pkt->data;
                    /* copy data from origin buffer to immed area in packet header */
                    mpi_errno = immed_copy(src, dest, get_accum_pkt->immed_len);
                    if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
745 746 747 748 749

                    /* If all data is in pkt header, mark this op as a candidate
                       for piggybacking LOCK. */
                    if (get_accum_pkt->immed_len == len)
                        new_ptr->piggyback_lock_candidate = 1;
Xin Zhao's avatar
Xin Zhao committed
750 751
                }
            }
752
        }
753

754 755 756 757 758 759 760
        new_ptr->ureq = NULL; /* reset user request */

        /* Remember user request */
        if (ureq) {
            new_ptr->ureq = ureq;
        }

Xin Zhao's avatar
Xin Zhao committed
761 762
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

763 764 765 766
        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

767 768 769 770 771 772 773 774 775 776
        mpi_errno = MPIDI_CH3I_RMA_Make_progress_target(win_ptr, target_rank, &made_progress);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);

        win_ptr->posted_ops_cnt++;
        if (MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS >= 0 &&
            win_ptr->posted_ops_cnt >= MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS) {
            mpi_errno = poke_progress_engine();
            if (mpi_errno != MPI_SUCCESS)
                MPIU_ERR_POP(mpi_errno);
        }
777 778 779 780 781 782 783 784 785 786 787 788 789 790

        if (MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD >= 0 &&
            win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
            while (win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
                int local_completed = 0, remote_completed = 0;
                mpi_errno = MPIDI_CH3I_RMA_Cleanup_ops_win(win_ptr, &local_completed,
                                                           &remote_completed);
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
                mpi_errno = poke_progress_engine();
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
            }
        }
791 792 793 794 795 796 797 798 799 800 801 802 803 804 805
    }

  fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_GET_ACCUMULATE);
    return mpi_errno;

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


#undef FUNCNAME
#define FUNCNAME MPIDI_Compare_and_swap
806 807
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
808 809 810
int MPIDI_Compare_and_swap(const void *origin_addr, const void *compare_addr,
                           void *result_addr, MPI_Datatype datatype, int target_rank,
                           MPI_Aint target_disp, MPID_Win * win_ptr)
811
{
812 813 814
    int mpi_errno = MPI_SUCCESS;
    int rank;
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
815
    int made_progress = 0;
816 817

    MPIDI_STATE_DECL(MPID_STATE_MPIDI_COMPARE_AND_SWAP);
818

819 820
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_COMPARE_AND_SWAP);

821 822 823
    MPIU_ERR_CHKANDJUMP(win_ptr->states.access_state == MPIDI_RMA_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

824 825 826 827 828
    if (target_rank == MPI_PROC_NULL) {
        goto fn_exit;
    }

    rank = win_ptr->comm_ptr->rank;
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
    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
        /* check if target is local and shared memory is allocated on window,
         * if so, we directly perform this operation on shared memory region. */

        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
         * the same node. However, in ch3:sock, even if origin and target are on the same node, they do
         * not within the same SHM region. Here we filter out ch3:sock by checking shm_allocated flag first,
         * which is only set to TRUE when SHM region is allocated in nemesis.
         * In future we need to figure out a way to check if origin and target are in the same "SHM comm".
         */
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }

    /* The datatype must be predefined, and one of: C integer, Fortran integer,
     * Logical, Multi-language types, or Byte.  This is checked above the ADI,
     * so there's no need to check it again here. */

    /* FIXME: For shared memory windows, we should provide an implementation
     * that uses a processor atomic operation. */
    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
        mpi_errno = MPIDI_CH3I_Shm_cas_op(origin_addr, compare_addr, result_addr,
                                          datatype, target_rank, target_disp, win_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
    }
    else {
        MPIDI_RMA_Op_t *new_ptr = NULL;
860
        MPIDI_CH3_Pkt_cas_t *cas_pkt = NULL;
861 862

        /* Append this operation to the RMA ops queue */
863 864
        mpi_errno = MPIDI_CH3I_Win_get_op(win_ptr, &new_ptr);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
865

Xin Zhao's avatar
Xin Zhao committed
866 867
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

868 869 870 871 872 873 874
        cas_pkt = &(new_ptr->pkt.cas);
        MPIDI_Pkt_init(cas_pkt, MPIDI_CH3_PKT_CAS);
        cas_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
            win_ptr->disp_units[target_rank] * target_disp;
        cas_pkt->datatype = datatype;
        cas_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
        cas_pkt->source_win_handle = win_ptr->handle;
875
        cas_pkt->origin_rank = rank;
876

877 878 879 880 881 882 883
        new_ptr->origin_addr = (void *) origin_addr;
        new_ptr->origin_count = 1;
        new_ptr->origin_datatype = datatype;
        new_ptr->result_addr = result_addr;
        new_ptr->result_datatype = datatype;
        new_ptr->compare_addr = (void *) compare_addr;
        new_ptr->compare_datatype = datatype;
884
        new_ptr->target_rank = target_rank;
885
        new_ptr->piggyback_lock_candidate = 1; /* CAS is always able to piggyback LOCK */
886
        new_ptr->ureq = NULL; /* reset user request */
887

Xin Zhao's avatar
Xin Zhao committed
888 889
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

890 891 892
        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
893 894 895 896 897 898 899 900 901 902 903

        mpi_errno = MPIDI_CH3I_RMA_Make_progress_target(win_ptr, target_rank, &made_progress);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);

        win_ptr->posted_ops_cnt++;
        if (MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS >= 0 &&
            win_ptr->posted_ops_cnt >= MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS) {
            mpi_errno = poke_progress_engine();
            if (mpi_errno != MPI_SUCCESS)
                MPIU_ERR_POP(mpi_errno);
        }
904 905 906 907 908 909 910 911 912 913 914 915 916 917

        if (MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD >= 0 &&
            win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
            while (win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
                int local_completed = 0, remote_completed = 0;
                mpi_errno = MPIDI_CH3I_RMA_Cleanup_ops_win(win_ptr, &local_completed,
                                                           &remote_completed);
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
                mpi_errno = poke_progress_engine();
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
            }
        }
918 919 920 921 922 923 924 925 926
    }

  fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_COMPARE_AND_SWAP);
    return mpi_errno;
    /* --BEGIN ERROR HANDLING-- */
  fn_fail:
    goto fn_exit;
    /* --END ERROR HANDLING-- */
927 928 929 930
}


#undef FUNCNAME
931
#define FUNCNAME MPIDI_Fetch_and_op
932 933
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
934 935 936
int MPIDI_Fetch_and_op(const void *origin_addr, void *result_addr,
                       MPI_Datatype datatype, int target_rank,
                       MPI_Aint target_disp, MPI_Op op, MPID_Win * win_ptr)
937 938
{
    int mpi_errno = MPI_SUCCESS;
939 940
    int rank;
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
941
    int made_progress = 0;
942 943

    MPIDI_STATE_DECL(MPID_STATE_MPIDI_FETCH_AND_OP);
944

945 946
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_FETCH_AND_OP);

947 948 949
    MPIU_ERR_CHKANDJUMP(win_ptr->states.access_state == MPIDI_RMA_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969
    if (target_rank == MPI_PROC_NULL) {
        goto fn_exit;
    }

    rank = win_ptr->comm_ptr->rank;

    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
        /* check if target is local and shared memory is allocated on window,
         * if so, we directly perform this operation on shared memory region. */

        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
         * the same node. However, in ch3:sock, even if origin and target are on the same node, they do
         * not within the same SHM region. Here we filter out ch3:sock by checking shm_allocated flag first,
         * which is only set to TRUE when SHM region is allocated in nemesis.
         * In future we need to figure out a way to check if origin and target are in the same "SHM comm".
         */
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }
970

971 972
    /* The datatype and op must be predefined.  This is checked above the ADI,
     * so there's no need to check it again here. */
973

974 975 976 977 978 979 980 981 982 983 984
    /* FIXME: For shared memory windows, we should provide an implementation
     * that uses a processor atomic operation. */
    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
        mpi_errno = MPIDI_CH3I_Shm_fop_op(origin_addr, result_addr, datatype,
                                          target_rank, target_disp, op, win_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
    }
    else {
        MPIDI_RMA_Op_t *new_ptr = NULL;
985

986
        /* Append this operation to the RMA ops queue */
987 988
        mpi_errno = MPIDI_CH3I_Win_get_op(win_ptr, &new_ptr);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
989

Xin Zhao's avatar
Xin Zhao committed
990 991
        MPIR_T_PVAR_TIMER_START(RMA, rma_rmaqueue_set);

992 993 994 995 996 997 998 999 1000 1001 1002
        if (op == MPI_NO_OP) {
            /* Convert FOP to a Get */
            MPIDI_CH3_Pkt_get_t *get_pkt = &(new_ptr->pkt.get);
            MPIDI_Pkt_init(get_pkt, MPIDI_CH3_PKT_GET);
            get_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
                win_ptr->disp_units[target_rank] * target_disp;
            get_pkt->count = 1;
            get_pkt->datatype = datatype;
            get_pkt->dataloop_size = 0;
            get_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
            get_pkt->source_win_handle = win_ptr->handle;
1003
            get_pkt->origin_rank = rank;
1004

1005 1006 1007 1008
            new_ptr->origin_addr = result_addr;
            new_ptr->origin_count = 1;
            new_ptr->origin_datatype = datatype;
            new_ptr->target_rank = target_rank;
1009
            new_ptr->piggyback_lock_candidate = 1;
1010 1011 1012
        }
        else {
            MPIDI_CH3_Pkt_fop_t *fop_pkt = &(new_ptr->pkt.fop);
Xin Zhao's avatar
Xin Zhao committed
1013 1014 1015
            size_t len;
            MPI_Aint origin_type_size;

1016 1017 1018 1019 1020 1021 1022
            MPIDI_Pkt_init(fop_pkt, MPIDI_CH3_PKT_FOP);
            fop_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
                win_ptr->disp_units[target_rank] * target_disp;
            fop_pkt->datatype = datatype;
            fop_pkt->op = op;
            fop_pkt->source_win_handle = win_ptr->handle;
            fop_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
Xin Zhao's avatar
Xin Zhao committed
1023
            fop_pkt->immed_len = 0;
1024
            fop_pkt->origin_rank = rank;
1025 1026 1027 1028 1029 1030 1031

            new_ptr->origin_addr = (void *) origin_addr;
            new_ptr->origin_count = 1;
            new_ptr->origin_datatype = datatype;
            new_ptr->result_addr = result_addr;
            new_ptr->result_datatype = datatype;
            new_ptr->target_rank = target_rank;
1032
            new_ptr->piggyback_lock_candidate = 1;
Xin Zhao's avatar
Xin Zhao committed
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047

            MPID_Datatype_get_size_macro(new_ptr->origin_datatype, origin_type_size);
            /* length of origin data */
            MPIU_Assign_trunc(len, new_ptr->origin_count * origin_type_size, size_t);
            /* length of origin data that can fit into immed area in pkt header */
            MPIU_Assign_trunc(fop_pkt->immed_len,
                              MPIR_MIN(len, (MPIDI_RMA_IMMED_BYTES / origin_type_size) * origin_type_size),
                              size_t);

            if (fop_pkt->immed_len > 0) {
                void *src = new_ptr->origin_addr, *dest = fop_pkt->data;
                /* copy data from origin buffer to immed area in packet header */
                mpi_errno = immed_copy(src, dest, fop_pkt->immed_len);
                if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);
            }
1048
        }
1049

1050 1051
        new_ptr->ureq = NULL; /* reset user request */

Xin Zhao's avatar
Xin Zhao committed
1052 1053
        MPIR_T_PVAR_TIMER_END(RMA, rma_rmaqueue_set);

1054 1055 1056
        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067

        mpi_errno = MPIDI_CH3I_RMA_Make_progress_target(win_ptr, target_rank, &made_progress);
        if (mpi_errno != MPI_SUCCESS) MPIU_ERR_POP(mpi_errno);

        win_ptr->posted_ops_cnt++;
        if (MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS >= 0 &&
            win_ptr->posted_ops_cnt >= MPIR_CVAR_CH3_RMA_OP_POKING_PROGRESS) {
            mpi_errno = poke_progress_engine();
            if (mpi_errno != MPI_SUCCESS)
                MPIU_ERR_POP(mpi_errno);
        }
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081

        if (MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD >= 0 &&
            win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
            while (win_ptr->active_req_cnt >= MPIR_CVAR_CH3_RMA_ACTIVE_REQ_THRESHOLD) {
                int local_completed = 0, remote_completed = 0;
                mpi_errno = MPIDI_CH3I_RMA_Cleanup_ops_win(win_ptr, &local_completed,
                                                           &remote_completed);
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
                mpi_errno = poke_progress_engine();
                if (mpi_errno != MPI_SUCCESS)
                    MPIU_ERR_POP(mpi_errno);
            }
        }
1082 1083 1084 1085
    }

  fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_FETCH_AND_OP);
1086
    return mpi_errno;
1087 1088 1089 1090
    /* --BEGIN ERROR HANDLING-- */
  fn_fail:
    goto fn_exit;
    /* --END ERROR HANDLING-- */
1091
}