ch3u_rma_ops.c 28.4 KB
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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
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/*
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpidrma.h"

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static int enableShortACC = 1;
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#define MPIDI_PASSIVE_TARGET_DONE_TAG  348297
#define MPIDI_PASSIVE_TARGET_RMA_TAG 563924

#undef FUNCNAME
#define FUNCNAME MPIDI_Put
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
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int MPIDI_Put(const void *origin_addr, int origin_count, MPI_Datatype
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              origin_datatype, int target_rank, MPI_Aint target_disp,
              int target_count, MPI_Datatype target_datatype, MPID_Win * win_ptr)
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{
    int mpi_errno = MPI_SUCCESS;
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    int dt_contig ATTRIBUTE((unused)), rank;
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    MPID_Datatype *dtp;
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    MPI_Aint dt_true_lb ATTRIBUTE((unused));
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    MPIDI_msg_sz_t data_sz;
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    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
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    MPIDI_STATE_DECL(MPID_STATE_MPIDI_PUT);
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    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_PUT);

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

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    if (win_ptr->epoch_state == MPIDI_EPOCH_NONE && win_ptr->fence_issued) {
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        win_ptr->epoch_state = MPIDI_EPOCH_FENCE;
    }

    MPIU_ERR_CHKANDJUMP(win_ptr->epoch_state == MPIDI_EPOCH_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

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

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

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    rank = win_ptr->comm_ptr->rank;
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    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
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        /* check if target is local and shared memory is allocated on window,
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         * if so, we directly perform this operation on shared memory region. */
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        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
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         * 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".
         */
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        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }

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    /* If the put is a local operation, do it here */
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    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
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        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
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        mpi_errno = MPIDI_CH3I_Shm_put_op(origin_addr, origin_count, origin_datatype, target_rank,
                                          target_disp, target_count, target_datatype, win_ptr);
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        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
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    }
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    else {
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        MPIDI_RMA_Op_t *new_ptr = NULL;
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        MPIDI_CH3_Pkt_put_t *put_pkt = NULL;
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        /* queue it up */
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        new_ptr = MPIDI_CH3I_Win_op_alloc(win_ptr);
        MPIU_ERR_CHKANDJUMP(new_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem");
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        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;

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        /* 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;

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        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

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        /* 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);
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            new_ptr->is_dt = 1;
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        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
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            new_ptr->is_dt = 1;
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        }
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    }

  fn_exit:
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    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_PUT);
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    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
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              origin_datatype, int target_rank, MPI_Aint target_disp,
              int target_count, MPI_Datatype target_datatype, MPID_Win * win_ptr)
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{
    int mpi_errno = MPI_SUCCESS;
    MPIDI_msg_sz_t data_sz;
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    int dt_contig ATTRIBUTE((unused)), rank;
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    MPI_Aint dt_true_lb ATTRIBUTE((unused));
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    MPID_Datatype *dtp;
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    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
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    MPIDI_STATE_DECL(MPID_STATE_MPIDI_GET);
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    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_GET);

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

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    if (win_ptr->epoch_state == MPIDI_EPOCH_NONE && win_ptr->fence_issued) {
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        win_ptr->epoch_state = MPIDI_EPOCH_FENCE;
    }

    MPIU_ERR_CHKANDJUMP(win_ptr->epoch_state == MPIDI_EPOCH_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

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    MPIDI_Datatype_get_info(origin_count, origin_datatype, dt_contig, data_sz, dtp, dt_true_lb);
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    if (data_sz == 0) {
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        goto fn_exit;
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    }

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    rank = win_ptr->comm_ptr->rank;
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    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
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        /* check if target is local and shared memory is allocated on window,
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         * if so, we directly perform this operation on shared memory region. */
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        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
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         * 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".
         */
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        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }
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    /* If the get is a local operation, do it here */
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    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
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        (win_ptr->shm_allocated == TRUE && orig_vc->node_id == target_vc->node_id)) {
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        mpi_errno = MPIDI_CH3I_Shm_get_op(origin_addr, origin_count, origin_datatype, target_rank,
                                          target_disp, target_count, target_datatype, win_ptr);
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        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
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    }
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    else {
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        MPIDI_RMA_Op_t *new_ptr = NULL;
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        MPIDI_CH3_Pkt_get_t *get_pkt = NULL;
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        /* queue it up */
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        new_ptr = MPIDI_CH3I_Win_op_alloc(win_ptr);
        MPIU_ERR_CHKANDJUMP(new_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem");
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        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;

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        /* 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;

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        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

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        /* 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);
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            new_ptr->is_dt = 1;
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        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
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            new_ptr->is_dt = 1;
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        }
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    }

  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)
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int MPIDI_Accumulate(const void *origin_addr, int origin_count, MPI_Datatype
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                     origin_datatype, int target_rank, MPI_Aint target_disp,
                     int target_count, MPI_Datatype target_datatype, MPI_Op op, MPID_Win * win_ptr)
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{
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    int mpi_errno = MPI_SUCCESS;
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    MPIDI_msg_sz_t data_sz;
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    int dt_contig ATTRIBUTE((unused)), rank;
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    MPI_Aint dt_true_lb ATTRIBUTE((unused));
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    MPID_Datatype *dtp;
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    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;
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    MPIDI_STATE_DECL(MPID_STATE_MPIDI_ACCUMULATE);
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    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_ACCUMULATE);

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

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    if (win_ptr->epoch_state == MPIDI_EPOCH_NONE && win_ptr->fence_issued) {
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        win_ptr->epoch_state = MPIDI_EPOCH_FENCE;
    }

    MPIU_ERR_CHKANDJUMP(win_ptr->epoch_state == MPIDI_EPOCH_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

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

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    if (data_sz == 0) {
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        goto fn_exit;
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    }
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    rank = win_ptr->comm_ptr->rank;
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    if (win_ptr->shm_allocated == TRUE && target_rank != rank &&
        win_ptr->create_flavor != MPI_WIN_FLAVOR_SHARED) {
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        /* check if target is local and shared memory is allocated on window,
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         * if so, we directly perform this operation on shared memory region. */
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        /* FIXME: Here we decide whether to perform SHM operations by checking if origin and target are on
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         * 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".
         */
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        MPIDI_Comm_get_vc(win_ptr->comm_ptr, rank, &orig_vc);
        MPIDI_Comm_get_vc(win_ptr->comm_ptr, target_rank, &target_vc);
    }

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    /* Do =! rank first (most likely branch?) */
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    if (target_rank == rank || win_ptr->create_flavor == MPI_WIN_FLAVOR_SHARED ||
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        (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);
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    }
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    else {
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        MPIDI_RMA_Op_t *new_ptr = NULL;
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        MPIDI_CH3_Pkt_accum_t *accum_pkt = NULL;
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        /* queue it up */
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        new_ptr = MPIDI_CH3I_Win_op_alloc(win_ptr);
        MPIU_ERR_CHKANDJUMP(new_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem");
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        /* If predefined and contiguous, use a simplified element */
        if (MPIR_DATATYPE_IS_PREDEFINED(origin_datatype) &&
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            MPIR_DATATYPE_IS_PREDEFINED(target_datatype) && enableShortACC) {
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            MPI_Aint origin_type_size;
            size_t len;

            MPID_Datatype_get_size_macro(origin_datatype, origin_type_size);
            MPIU_Assign_trunc(len, origin_count * origin_type_size, size_t);
            if (MPIR_CVAR_CH3_RMA_ACC_IMMED && len <= MPIDI_RMA_IMMED_INTS * sizeof(int)) {
                MPIDI_CH3_Pkt_accum_immed_t *accumi_pkt;

                accumi_pkt = &(new_ptr->pkt.accum_immed);
                MPIDI_Pkt_init(accumi_pkt, MPIDI_CH3_PKT_ACCUM_IMMED);
                accumi_pkt->addr = (char *) win_ptr->base_addrs[target_rank] +
                    win_ptr->disp_units[target_rank] * target_disp;
                accumi_pkt->count = target_count;
                accumi_pkt->datatype = target_datatype;
                accumi_pkt->op = op;
                accumi_pkt->target_win_handle = win_ptr->all_win_handles[target_rank];
                accumi_pkt->source_win_handle = win_ptr->handle;

                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;
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                mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
                if (mpi_errno)
                    MPIU_ERR_POP(mpi_errno);

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                goto fn_exit;
            }
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        }

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        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;

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        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;

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        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

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        /* 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);
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            new_ptr->is_dt = 1;
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        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
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            new_ptr->is_dt = 1;
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        }
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    }

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  fn_exit:
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    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_ACCUMULATE);
    return mpi_errno;

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


#undef FUNCNAME
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#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,
                         MPID_Win * win_ptr)
{
    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;
    MPIDI_STATE_DECL(MPID_STATE_MPIDI_GET_ACCUMULATE);

    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_GET_ACCUMULATE);

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

    if (win_ptr->epoch_state == MPIDI_EPOCH_NONE && win_ptr->fence_issued) {
        win_ptr->epoch_state = MPIDI_EPOCH_FENCE;
    }

    MPIU_ERR_CHKANDJUMP(win_ptr->epoch_state == MPIDI_EPOCH_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

    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);
    }
    else {
        MPIDI_RMA_Op_t *new_ptr = NULL;

        /* Append the operation to the window's RMA ops queue */
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        new_ptr = MPIDI_CH3I_Win_op_alloc(win_ptr);
        MPIU_ERR_CHKANDJUMP(new_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem");
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        /* TODO: Can we use the MPIDI_RMA_ACC_CONTIG optimization? */

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        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;

            new_ptr->origin_addr = result_addr;
            new_ptr->origin_count = result_count;
            new_ptr->origin_datatype = result_datatype;
            new_ptr->target_rank = target_rank;
        }

        else {
            MPIDI_CH3_Pkt_accum_t *accum_pkt = &(new_ptr->pkt.accum);
            MPIDI_Pkt_init(accum_pkt, MPIDI_CH3_PKT_GET_ACCUM);
            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;

            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;
        }
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        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);

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        /* if source or target datatypes are derived, increment their
         * reference counts */
        if (op != MPI_NO_OP && !MPIR_DATATYPE_IS_PREDEFINED(origin_datatype)) {
            MPID_Datatype_get_ptr(origin_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
513
            new_ptr->is_dt = 1;
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        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(result_datatype)) {
            MPID_Datatype_get_ptr(result_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
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            new_ptr->is_dt = 1;
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        }
        if (!MPIR_DATATYPE_IS_PREDEFINED(target_datatype)) {
            MPID_Datatype_get_ptr(target_datatype, dtp);
            MPID_Datatype_add_ref(dtp);
523
            new_ptr->is_dt = 1;
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        }
    }

  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
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#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
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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)
545
{
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    int mpi_errno = MPI_SUCCESS;
    int rank;
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;

    MPIDI_STATE_DECL(MPID_STATE_MPIDI_COMPARE_AND_SWAP);
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_COMPARE_AND_SWAP);

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

    if (win_ptr->epoch_state == MPIDI_EPOCH_NONE && win_ptr->fence_issued) {
        win_ptr->epoch_state = MPIDI_EPOCH_FENCE;
    }
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    MPIU_ERR_CHKANDJUMP(win_ptr->epoch_state == MPIDI_EPOCH_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");
563

564
    rank = win_ptr->comm_ptr->rank;
565

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    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;
596
        MPIDI_CH3_Pkt_cas_t *cas_pkt = NULL;
597 598

        /* Append this operation to the RMA ops queue */
599 600
        new_ptr = MPIDI_CH3I_Win_op_alloc(win_ptr);
        MPIU_ERR_CHKANDJUMP(new_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem");
601

602 603 604 605 606 607 608 609
        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;

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        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;
617
        new_ptr->target_rank = target_rank;
618 619 620 621

        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
622 623 624 625 626 627 628 629 630
    }

  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-- */
631 632 633 634
}


#undef FUNCNAME
635
#define FUNCNAME MPIDI_Fetch_and_op
636 637
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
638 639 640
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)
641 642
{
    int mpi_errno = MPI_SUCCESS;
643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675
    int rank;
    MPIDI_VC_t *orig_vc = NULL, *target_vc = NULL;

    MPIDI_STATE_DECL(MPID_STATE_MPIDI_FETCH_AND_OP);
    MPIDI_RMA_FUNC_ENTER(MPID_STATE_MPIDI_FETCH_AND_OP);

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

    if (win_ptr->epoch_state == MPIDI_EPOCH_NONE && win_ptr->fence_issued) {
        win_ptr->epoch_state = MPIDI_EPOCH_FENCE;
    }

    MPIU_ERR_CHKANDJUMP(win_ptr->epoch_state == MPIDI_EPOCH_NONE,
                        mpi_errno, MPI_ERR_RMA_SYNC, "**rmasync");

    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);
    }
676

677 678
    /* The datatype and op must be predefined.  This is checked above the ADI,
     * so there's no need to check it again here. */
679

680 681 682 683 684 685 686 687 688 689 690
    /* 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;
691
        MPIDI_CH3_Pkt_fop_t *fop_pkt = NULL;
692

693
        /* Append this operation to the RMA ops queue */
694 695
        new_ptr = MPIDI_CH3I_Win_op_alloc(win_ptr);
        MPIU_ERR_CHKANDJUMP(new_ptr == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem");
696

697 698 699 700 701 702 703 704 705
        fop_pkt = &(new_ptr->pkt.fop);
        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];

706 707 708 709 710
        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;
711
        new_ptr->target_rank = target_rank;
712 713 714 715

        mpi_errno = MPIDI_CH3I_Win_enqueue_op(win_ptr, new_ptr);
        if (mpi_errno)
            MPIU_ERR_POP(mpi_errno);
716 717 718 719
    }

  fn_exit:
    MPIDI_RMA_FUNC_EXIT(MPID_STATE_MPIDI_FETCH_AND_OP);
720
    return mpi_errno;
721 722 723 724
    /* --BEGIN ERROR HANDLING-- */
  fn_fail:
    goto fn_exit;
    /* --END ERROR HANDLING-- */
725
}