int MPID_Send(const void * buf, MPI_Aint count, MPI_Datatype datatype, int rank,
int tag, MPID_Comm * comm, int context_offset,
MPID_Request ** request)
{
MPIDI_msg_sz_t data_sz;
int dt_contig;
MPI_Aint dt_true_lb;
MPID_Datatype * dt_ptr;
MPID_Request * sreq = NULL;
MPIDI_VC_t * vc;
#if defined(MPID_USE_SEQUENCE_NUMBERS)
MPID_Seqnum_t seqnum;
#endif
int eager_threshold = -1;
int mpi_errno = MPI_SUCCESS;
#if defined(FINEGRAIN_MPI)
int destpid=-1, destworldrank=-1;
#endif
MPIDI_STATE_DECL(MPID_STATE_MPID_SEND);
MPIDI_FUNC_ENTER(MPID_STATE_MPID_SEND);
MPIU_DBG_MSG_FMT(CH3_OTHER,VERBOSE,(MPIU_DBG_FDEST,
"rank=%d, tag=%d, context=%d",
rank, tag, comm->context_id + context_offset));
/* Check to make sure the communicator hasn't already been revoked */
if (comm->revoked &&
MPIR_AGREE_TAG != MPIR_TAG_MASK_ERROR_BITS(tag & ~MPIR_Process.tagged_coll_mask) &&
MPIR_SHRINK_TAG != MPIR_TAG_MASK_ERROR_BITS(tag & ~MPIR_Process.tagged_coll_mask)) {
MPIR_ERR_SETANDJUMP(mpi_errno,MPIX_ERR_REVOKED,"**revoked");
}
#if defined(FINEGRAIN_MPI)
MPIDI_Comm_get_pid_worldrank(comm, rank, &destpid, &destworldrank);
if (COMPARE_RANKS(rank,comm,destpid) && comm->comm_kind != MPID_INTERCOMM)
{
mpi_errno = MPIDI_Isend_self(&buf, count, datatype, rank, tag, comm,
context_offset, MPIDI_REQUEST_TYPE_SEND,
&sreq);
if (rank == comm->rank)
{
printf("my_fgrank=%d: %s, self send DEADLOCK\n", my_fgrank, __FUNCTION__);
if (sreq != NULL && sreq->cc != 0) {
MPIR_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,
"**dev|selfsenddeadlock");
}
}
#else
if (rank == comm->rank && comm->comm_kind != MPID_INTERCOMM)
{
mpi_errno = MPIDI_Isend_self(buf, count, datatype, rank, tag, comm,
context_offset, MPIDI_REQUEST_TYPE_SEND,
&sreq);
/* In the single threaded case, sending to yourself will cause
deadlock. Note that in the runtime-thread case, this check
will not be made (long-term FIXME) */
# ifndef MPICH_IS_THREADED
{
if (sreq != NULL && MPID_cc_get(sreq->cc) != 0) {
MPIR_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,
"**dev|selfsenddeadlock");
}
}
# endif
#endif
if (mpi_errno != MPI_SUCCESS) { MPIR_ERR_POP(mpi_errno); }
goto fn_exit;
}
if (rank == MPI_PROC_NULL)
{
goto fn_exit;
}
#if defined(FINEGRAIN_MPI)
MPIDI_Comm_get_vc_set_active_direct(comm, destpid, &vc);
#else
MPIDI_Comm_get_vc_set_active(comm, rank, &vc);
#endif
MPIR_ERR_CHKANDJUMP1(vc->state == MPIDI_VC_STATE_MORIBUND, mpi_errno, MPIX_ERR_PROC_FAILED, "**comm_fail", "**comm_fail %d", rank);
#ifdef ENABLE_COMM_OVERRIDES
if (vc->comm_ops && vc->comm_ops->send)
{
mpi_errno = vc->comm_ops->send( vc, buf, count, datatype, rank, tag, comm, context_offset, &sreq);
goto fn_exit;
}
#endif
MPIDI_Datatype_get_info(count, datatype, dt_contig, data_sz, dt_ptr,
dt_true_lb);
if (data_sz == 0)
{
MPIDI_CH3_Pkt_t upkt;
MPIDI_CH3_Pkt_eager_send_t * const eager_pkt = &upkt.eager_send;
MPIU_DBG_MSG(CH3_OTHER,VERBOSE,"sending zero length message");
MPIDI_Pkt_init(eager_pkt, MPIDI_CH3_PKT_EAGER_SEND);
#if defined(FINEGRAIN_MPI)
eager_pkt->match.parts.dest_rank = destworldrank;
#endif
eager_pkt->match.parts.rank = comm->rank;
eager_pkt->match.parts.tag = tag;
eager_pkt->match.parts.context_id = comm->context_id + context_offset;
eager_pkt->sender_req_id = MPI_REQUEST_NULL;
eager_pkt->data_sz = 0;
MPIDI_VC_FAI_send_seqnum(vc, seqnum);
MPIDI_Pkt_set_seqnum(eager_pkt, seqnum);
MPID_THREAD_CS_ENTER(POBJ, vc->pobj_mutex);
mpi_errno = MPIDI_CH3_iStartMsg(vc, eager_pkt, sizeof(*eager_pkt), &sreq);
MPID_THREAD_CS_EXIT(POBJ, vc->pobj_mutex);
/* --BEGIN ERROR HANDLING-- */
if (mpi_errno != MPI_SUCCESS)
{
MPIR_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**ch3|eagermsg");
}
/* --END ERROR HANDLING-- */
if (sreq != NULL)
{
MPIDI_Request_set_seqnum(sreq, seqnum);
MPIDI_Request_set_type(sreq, MPIDI_REQUEST_TYPE_SEND);
/* sreq->comm = comm;
MPIR_Comm_add_ref(comm); -- not necessary for blocking functions */
}
goto fn_exit;
}
MPIDI_CH3_GET_EAGER_THRESHOLD(&eager_threshold, comm, vc);
/* FIXME: flow control: limit number of outstanding eager messages
containing data and need to be buffered by the receiver */
#ifdef USE_EAGER_SHORT
if (dt_contig && data_sz <= MPIDI_EAGER_SHORT_SIZE) {
mpi_errno = MPIDI_CH3_EagerContigShortSend( &sreq,
MPIDI_CH3_PKT_EAGERSHORT_SEND,
(char *)buf + dt_true_lb,
data_sz, rank, tag, comm,
context_offset );
}
else
#endif
if (data_sz + sizeof(MPIDI_CH3_Pkt_eager_send_t) <= eager_threshold)
{
if (dt_contig)
{
mpi_errno = MPIDI_CH3_EagerContigSend( &sreq,
MPIDI_CH3_PKT_EAGER_SEND,
(char *)buf + dt_true_lb,
data_sz, rank, tag, comm,
context_offset );
}
else
{
MPIDI_Request_create_sreq(sreq, mpi_errno, goto fn_exit);
MPIDI_Request_set_type(sreq, MPIDI_REQUEST_TYPE_SEND);
mpi_errno = MPIDI_CH3_EagerNoncontigSend( &sreq,
MPIDI_CH3_PKT_EAGER_SEND,
buf, count, datatype,
data_sz, rank, tag,
comm, context_offset );
}
}
else
{
int MPID_Send(const void * buf, int count, MPI_Datatype datatype, int rank,
int tag, MPID_Comm * comm, int context_offset,
MPID_Request ** request)
{
MPIDI_msg_sz_t data_sz;
int dt_contig;
MPI_Aint dt_true_lb;
MPID_Datatype * dt_ptr;
MPID_Request * sreq = NULL;
MPIDI_VC_t * vc;
#if defined(MPID_USE_SEQUENCE_NUMBERS)
MPID_Seqnum_t seqnum;
#endif
int mpi_errno = MPI_SUCCESS;
MPIDI_STATE_DECL(MPID_STATE_MPID_SEND);
MPIDI_FUNC_ENTER(MPID_STATE_MPID_SEND);
MPIU_DBG_MSG_FMT(CH3_OTHER,VERBOSE,(MPIU_DBG_FDEST,
"rank=%d, tag=%d, context=%d",
rank, tag, comm->context_id + context_offset));
if (rank == comm->rank && comm->comm_kind != MPID_INTERCOMM)
{
mpi_errno = MPIDI_Isend_self(buf, count, datatype, rank, tag, comm,
context_offset, MPIDI_REQUEST_TYPE_SEND,
&sreq);
/* In the single threaded case, sending to yourself will cause
deadlock. Note that in the runtime-thread case, this check
will not be made (long-term FIXME) */
# ifndef MPICH_IS_THREADED
{
if (sreq != NULL && sreq->cc != 0) {
MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,
"**dev|selfsenddeadlock");
}
}
# endif
if (mpi_errno != MPI_SUCCESS) { MPIU_ERR_POP(mpi_errno); }
goto fn_exit;
}
if (rank == MPI_PROC_NULL)
{
goto fn_exit;
}
MPIDI_Comm_get_vc_set_active(comm, rank, &vc);
#ifdef ENABLE_COMM_OVERRIDES
if (vc->comm_ops && vc->comm_ops->send)
{
mpi_errno = vc->comm_ops->send( vc, buf, count, datatype, rank, tag, comm, context_offset, &sreq);
goto fn_exit;
}
#endif
MPIDI_Datatype_get_info(count, datatype, dt_contig, data_sz, dt_ptr,
dt_true_lb);
if (data_sz == 0)
{
MPIDI_CH3_Pkt_t upkt;
MPIDI_CH3_Pkt_eager_send_t * const eager_pkt = &upkt.eager_send;
MPIU_DBG_MSG(CH3_OTHER,VERBOSE,"sending zero length message");
MPIDI_Pkt_init(eager_pkt, MPIDI_CH3_PKT_EAGER_SEND);
eager_pkt->match.parts.rank = comm->rank;
eager_pkt->match.parts.tag = tag;
eager_pkt->match.parts.context_id = comm->context_id + context_offset;
eager_pkt->sender_req_id = MPI_REQUEST_NULL;
eager_pkt->data_sz = 0;
MPIDI_VC_FAI_send_seqnum(vc, seqnum);
MPIDI_Pkt_set_seqnum(eager_pkt, seqnum);
MPIU_THREAD_CS_ENTER(CH3COMM,vc);
mpi_errno = MPIDI_CH3_iStartMsg(vc, eager_pkt, sizeof(*eager_pkt), &sreq);
MPIU_THREAD_CS_EXIT(CH3COMM,vc);
/* --BEGIN ERROR HANDLING-- */
if (mpi_errno != MPI_SUCCESS)
{
MPIU_ERR_SETANDJUMP(mpi_errno,MPI_ERR_OTHER,"**ch3|eagermsg");
}
/* --END ERROR HANDLING-- */
if (sreq != NULL)
{
MPIDI_Request_set_seqnum(sreq, seqnum);
MPIDI_Request_set_type(sreq, MPIDI_REQUEST_TYPE_SEND);
/* sreq->comm = comm;
MPIR_Comm_add_ref(comm); -- not necessary for blocking functions */
}
goto fn_exit;
}
/* FIXME: flow control: limit number of outstanding eager messsages
containing data and need to be buffered by the receiver */
#ifdef USE_EAGER_SHORT
if (dt_contig && data_sz <= MPIDI_EAGER_SHORT_SIZE) {
mpi_errno = MPIDI_CH3_EagerContigShortSend( &sreq,
MPIDI_CH3_PKT_EAGERSHORT_SEND,
(char *)buf + dt_true_lb,
data_sz, rank, tag, comm,
context_offset );
}
else
#endif
if (data_sz + sizeof(MPIDI_CH3_Pkt_eager_send_t) <=
vc->eager_max_msg_sz) {
if (dt_contig) {
mpi_errno = MPIDI_CH3_EagerContigSend( &sreq,
MPIDI_CH3_PKT_EAGER_SEND,
(char *)buf + dt_true_lb,
data_sz, rank, tag, comm,
context_offset );
}
else {
MPIDI_Request_create_sreq(sreq, mpi_errno, goto fn_exit);
MPIDI_Request_set_type(sreq, MPIDI_REQUEST_TYPE_SEND);
mpi_errno = MPIDI_CH3_EagerNoncontigSend( &sreq,
MPIDI_CH3_PKT_EAGER_SEND,
buf, count, datatype,
data_sz, rank, tag,
comm, context_offset );
}
}
else {
