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/*
* Copyright (c) 2001-2003 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
*
* $Id: lamsend.c,v 6.28 2003/10/28 12:39:44 jsquyres Exp $
*
* Function: - shared code for send functions
*/
#include <errno.h>
#include <mpi.h>
#include <mpisys.h>
#include <mpitrace.h>
#include <rpisys.h>
#include <typical.h>
#if LAM_WANT_IMPI
#include <impi.h>
#endif
#include <lamdebug.h>
#include <blktype.h>
#include <lam-ssi-rpi.h>
/*
* external variables
*/
extern struct _proc *lam_impid_proc;
/*
* lam_send
*
* Function: - send a blocking MPI message
* Accepts: - MPI send args
* - request type
* Returns: - MPI_SUCCESS or error code
*/
int
lam_send(void *buf, int count, MPI_Datatype dtype, int dest, int tag,
MPI_Comm comm, int reqtype)
{
int err;
int fl_trace; /* do tracing? */
int req_err; /* recoverable error */
int seqnum; /* message sequence number */
struct _req req_storage;
MPI_Request req;
double startt = 0.0; /* start time */
double finisht; /* finish time */
#if LAM_WANT_IMPI
int flag;
#endif
/*
* Handle the trivial cases.
*/
if (dest == MPI_ANY_SOURCE)
return(lam_mkerr(MPI_ERR_RANK, EINVAL));
if (dest == MPI_PROC_NULL)
return(MPI_SUCCESS);
if ((fl_trace = LAM_TRACE_TOP())) {
startt = MPI_Wtime();
_kio.ki_blktime = 0.0;
}
#if LAM_WANT_IMPI
/*
* If IMPI_Send_lamgiappe returns flag=1, this is an IMPI proxy send.
* Need to re-route to the impid.
*/
err = IMPI_Send_lamgiappe(reqtype, count, dtype, dest, tag, comm,
&flag);
if (err != MPI_SUCCESS)
return err;
if (flag == 1) {
dest = impid_comm->c_group->g_nprocs - 1;
tag = IMPI_MESSAGE_TAG;
comm = impid_comm;
}
#endif
if (RPI_HAS_FASTSEND(comm, dest) && reqtype == LAM_RQISEND &&
lam_rq_nactv == 0) {
if (comm == MPI_COMM_NULL)
return(lam_mkerr(MPI_ERR_COMM, EINVAL));
if (LAM_IS_INTER(comm) || dest != comm->c_group->g_myrank) {
errno = 0;
err = RPI_FASTSEND(buf, count, dtype, dest, tag, comm);
/* The RPI's "fast" methods may be temporarily
unavailable. If the "fast" method returns
something other than MPI_SUCCESS, and errno ==
EBUSY, then just fail gracefully over to the normal
send. In all other cases, handle the
success/failure here. */
if (err == MPI_SUCCESS ||
(err != MPI_SUCCESS && errno != EBUSY)) {
/* Generate a trace */
if (fl_trace) {
finisht = MPI_Wtime();
lam_tr_msg(TRTOUTPUT, startt,
LAM_S2US(finisht - startt - _kio.ki_blktime),
LAM_S2US(_kio.ki_blktime), dest, tag,
comm, dtype, count, 0, 0, lam_seqnum-1,
reqtype);
}
return(err);
}
}
}
LAM_ZERO_ME(req_storage);
req = &req_storage;
err = _mpi_req_build(buf, count, dtype, dest, tag, comm, reqtype,
&req);
if (err != MPI_SUCCESS)
return(err);
req->rq_marks |= (LAM_RQFBLKTYPE | LAM_RQFMAND);
err = _mpi_req_start(req);
if (err != MPI_SUCCESS)
return(err);
_mpi_req_add_m(req);
_mpi_req_blkclr_m();
_mpi_req_blkset_m(req);
err = _mpi_req_advance();
if (err != MPI_SUCCESS)
return(err);
req_err = req->rq_status.MPI_ERROR;
seqnum = req->rq_seq;
_mpi_req_rem_m(req);
err = _mpi_req_destroy(&req);
if (err != MPI_SUCCESS)
return(err);
/*
* Generate a trace.
*/
if (fl_trace) {
finisht = MPI_Wtime();
lam_tr_msg(TRTOUTPUT, startt,
LAM_S2US(finisht - startt - _kio.ki_blktime),
LAM_S2US(_kio.ki_blktime), dest, tag,
comm, dtype, count, 0, 0, seqnum, reqtype);
}
return(req_err);
}
/*
* lam_isend
*
* Function: - send a non-blocking MPI message
* Accepts: - MPI isend args
* - request type
* Returns: - MPI_SUCCESS or error code
*/
int
lam_isend(void *buf, int count, MPI_Datatype dtype, int dest, int tag,
MPI_Comm comm, MPI_Request *preq, int reqtype)
{
int err;
#if LAM_WANT_IMPI
MPI_Request lreq;
#endif
if (dest == MPI_ANY_SOURCE)
return(lam_mkerr(MPI_ERR_RANK, EINVAL));
#if LAM_WANT_IMPI
/* If IMPI_Isend_lamgiappe fills in a request, this is an IMPI
proxy send. Need to re-route to the impid. */
/* Values that reqtype can be: lam_rqibsend, lam_rqirsend,
lam_rqisend, lam_rqissend */
IMPI_Isend_lamgiappe(reqtype, count, dtype, dest, tag,
comm, &lreq);
if (lreq != MPI_REQUEST_NULL) {
dest = impid_comm->c_group->g_nprocs - 1;
tag = IMPI_MESSAGE_TAG;
comm = impid_comm;
}
#endif
*preq = MPI_REQUEST_NULL;
err = _mpi_req_build(buf, count, dtype, dest, tag, comm,
reqtype, preq);
if (err != MPI_SUCCESS)
return(err);
(*preq)->rq_marks |= LAM_RQFMAND;
err = _mpi_req_start(*preq);
if (err != MPI_SUCCESS)
return(err);
#if LAM_WANT_IMPI
/*
* Important to add the shadow *after* it has been started (so that
* the shadow doesn't get restarted)
*/
(*preq)->rq_shadow = lreq;
#endif
_mpi_req_add_m(*preq);
_mpi_req_blkclr_m();
err = _mpi_req_advance();
return(err);
}
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