/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2010 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpiimpl.h"
/*
=== BEGIN_MPI_T_CVAR_INFO_BLOCK ===
cvars:
- name : MPIR_CVAR_ISCATTERV_INTRA_ALGORITHM
category : COLLECTIVE
type : string
default : auto
class : device
verbosity : MPI_T_VERBOSITY_USER_BASIC
scope : MPI_T_SCOPE_ALL_EQ
description : |-
Variable to select iscatterv algorithm
auto - Internal algorithm selection
linear - Force linear algorithm
- name : MPIR_CVAR_ISCATTERV_INTER_ALGORITHM
category : COLLECTIVE
type : string
default : auto
class : device
verbosity : MPI_T_VERBOSITY_USER_BASIC
scope : MPI_T_SCOPE_ALL_EQ
description : |-
Variable to select iscatterv algorithm
auto - Internal algorithm selection
linear - Force linear algorithm
- name : MPIR_CVAR_ISCATTERV_DEVICE_COLLECTIVE
category : COLLECTIVE
type : boolean
default : true
class : device
verbosity : MPI_T_VERBOSITY_USER_BASIC
scope : MPI_T_SCOPE_ALL_EQ
description : >-
If set to true, MPI_Iscatterv will allow the device to override the
MPIR-level collective algorithms. The device still has the
option to call the MPIR-level algorithms manually.
If set to false, the device-level iscatterv function will not be
called.
=== END_MPI_T_CVAR_INFO_BLOCK ===
*/
/* -- Begin Profiling Symbol Block for routine MPI_Iscatterv */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Iscatterv = PMPI_Iscatterv
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Iscatterv MPI_Iscatterv
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Iscatterv as PMPI_Iscatterv
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Iscatterv(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype,
int root, MPI_Comm comm, MPI_Request * request)
__attribute__ ((weak, alias("PMPI_Iscatterv")));
#endif
/* -- End Profiling Symbol Block */
/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#undef MPI_Iscatterv
#define MPI_Iscatterv PMPI_Iscatterv
/* any non-MPI functions go here, especially non-static ones */
#undef FUNCNAME
#define FUNCNAME MPIR_Iscatterv_sched_intra_auto
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Iscatterv_sched_intra_auto(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount,
MPI_Datatype recvtype, int root, MPIR_Comm * comm_ptr,
MPIR_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
mpi_errno =
MPIR_Iscatterv_sched_allcomm_linear(sendbuf, sendcounts, displs, sendtype, recvbuf,
recvcount, recvtype, root, comm_ptr, s);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
#undef FUNCNAME
#define FUNCNAME MPIR_Iscatterv_sched_inter_auto
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Iscatterv_sched_inter_auto(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount,
MPI_Datatype recvtype, int root, MPIR_Comm * comm_ptr,
MPIR_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
mpi_errno =
MPIR_Iscatterv_sched_allcomm_linear(sendbuf, sendcounts, displs, sendtype, recvbuf,
recvcount, recvtype, root, comm_ptr, s);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
#undef FUNCNAME
#define FUNCNAME MPIR_Iscatterv_sched_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Iscatterv_sched_impl(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount,
MPI_Datatype recvtype, int root, MPIR_Comm * comm_ptr, MPIR_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
if (comm_ptr->comm_kind == MPIR_COMM_KIND__INTRACOMM) {
switch (MPIR_Iscatterv_intra_algo_choice) {
case MPIR_ISCATTERV_INTRA_ALGO_LINEAR:
mpi_errno =
MPIR_Iscatterv_sched_allcomm_linear(sendbuf, sendcounts, displs, sendtype,
recvbuf, recvcount, recvtype, root,
comm_ptr, s);
break;
case MPIR_ISCATTERV_INTRA_ALGO_AUTO:
MPL_FALLTHROUGH;
default:
mpi_errno =
MPIR_Iscatterv_sched_intra_auto(sendbuf, sendcounts, displs, sendtype, recvbuf,
recvcount, recvtype, root, comm_ptr, s);
break;
}
} else {
switch (MPIR_Iscatterv_inter_algo_choice) {
case MPIR_ISCATTERV_INTER_ALGO_LINEAR:
mpi_errno =
MPIR_Iscatterv_sched_allcomm_linear(sendbuf, sendcounts, displs, sendtype,
recvbuf, recvcount, recvtype, root,
comm_ptr, s);
break;
case MPIR_ISCATTERV_INTER_ALGO_AUTO:
MPL_FALLTHROUGH;
default:
mpi_errno =
MPIR_Iscatterv_sched_inter_auto(sendbuf, sendcounts, displs, sendtype, recvbuf,
recvcount, recvtype, root, comm_ptr, s);
break;
}
}
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
#undef FUNCNAME
#define FUNCNAME MPIR_Iscatterv_sched
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Iscatterv_sched(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype,
int root, MPIR_Comm * comm_ptr, MPIR_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
if (MPIR_CVAR_BARRIER_DEVICE_COLLECTIVE && MPIR_CVAR_DEVICE_COLLECTIVES) {
mpi_errno = MPID_Iscatterv_sched(sendbuf, sendcounts, displs, sendtype, recvbuf, recvcount,
recvtype, root, comm_ptr, s);
} else {
mpi_errno = MPIR_Iscatterv_sched_impl(sendbuf, sendcounts, displs, sendtype, recvbuf,
recvcount, recvtype, root, comm_ptr, s);
}
return mpi_errno;
}
#undef FUNCNAME
#define FUNCNAME MPIR_Iscatterv_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Iscatterv_impl(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount,
MPI_Datatype recvtype, int root, MPIR_Comm * comm_ptr,
MPIR_Request ** request)
{
int mpi_errno = MPI_SUCCESS;
int tag = -1;
MPIR_Sched_t s = MPIR_SCHED_NULL;
*request = NULL;
mpi_errno = MPIR_Sched_next_tag(comm_ptr, &tag);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
mpi_errno = MPIR_Sched_create(&s);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
mpi_errno =
MPIR_Iscatterv_sched(sendbuf, sendcounts, displs, sendtype, recvbuf, recvcount, recvtype,
root, comm_ptr, s);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
mpi_errno = MPIR_Sched_start(&s, comm_ptr, tag, request);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
#undef FUNCNAME
#define FUNCNAME MPIR_Iscatterv
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Iscatterv(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount,
MPI_Datatype recvtype, int root, MPIR_Comm * comm_ptr, MPIR_Request ** request)
{
int mpi_errno = MPI_SUCCESS;
if (MPIR_CVAR_BARRIER_DEVICE_COLLECTIVE && MPIR_CVAR_DEVICE_COLLECTIVES) {
mpi_errno = MPID_Iscatterv(sendbuf, sendcounts, displs, sendtype, recvbuf, recvcount,
recvtype, root, comm_ptr, request);
} else {
mpi_errno = MPIR_Iscatterv_impl(sendbuf, sendcounts, displs, sendtype, recvbuf, recvcount,
recvtype, root, comm_ptr, request);
}
return mpi_errno;
}
#endif /* MPICH_MPI_FROM_PMPI */
#undef FUNCNAME
#define FUNCNAME MPI_Iscatterv
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Iscatterv - Scatters a buffer in parts to all processes in a communicator
in a nonblocking way
Input Parameters:
+ sendbuf - address of send buffer (significant only at root) (choice)
. sendcounts - non-negative integer array (of length group size) specifying the number of elements to send to each processor (significant only at root)
. displs - integer array (of length group size). Entry i specifies the displacement (relative to sendbuf) from which to take the outgoing data to process i (significant only at root)
. sendtype - data type of send buffer elements (significant only at root) (handle)
. recvcount - number of elements in receive buffer (non-negative integer)
. recvtype - data type of receive buffer elements (handle)
. root - rank of sending process (integer)
- comm - communicator (handle)
Output Parameters:
+ recvbuf - starting address of the receive buffer (choice)
- request - communication request (handle)
.N ThreadSafe
.N Fortran
.N Errors
@*/
int MPI_Iscatterv(const void *sendbuf, const int sendcounts[], const int displs[],
MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype,
int root, MPI_Comm comm, MPI_Request * request)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Comm *comm_ptr = NULL;
MPIR_Request *request_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_ISCATTERV);
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_ISCATTERV);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_DATATYPE(sendtype, "sendtype", mpi_errno);
if (recvbuf != MPI_IN_PLACE)
MPIR_ERRTEST_DATATYPE(recvtype, "recvtype", mpi_errno);
MPIR_ERRTEST_COMM(comm, mpi_errno);
/* TODO more checks may be appropriate */
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* Convert MPI object handles to object pointers */
MPIR_Comm_get_ptr(comm, comm_ptr);
/* Validate parameters and objects (post conversion) */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_Datatype *sendtype_ptr = NULL, *recvtype_ptr = NULL;
int i, comm_size, rank;
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
if (comm_ptr->comm_kind == MPIR_COMM_KIND__INTRACOMM) {
MPIR_ERRTEST_INTRA_ROOT(comm_ptr, root, mpi_errno);
rank = comm_ptr->rank;
comm_size = comm_ptr->local_size;
if (rank == root) {
for (i = 0; i < comm_size; i++) {
MPIR_ERRTEST_COUNT(sendcounts[i], mpi_errno);
MPIR_ERRTEST_DATATYPE(sendtype, "sendtype", mpi_errno);
}
if (HANDLE_GET_KIND(sendtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype_get_ptr(sendtype, sendtype_ptr);
MPIR_Datatype_valid_ptr(sendtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
MPIR_Datatype_committed_ptr(sendtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
for (i = 0; i < comm_size; i++) {
if (sendcounts[i] > 0) {
MPIR_ERRTEST_USERBUFFER(sendbuf, sendcounts[i], sendtype, mpi_errno);
break;
}
}
for (i = 0; i < comm_size; i++) {
if (sendcounts[i] > 0) {
MPIR_ERRTEST_SENDBUF_INPLACE(sendbuf, sendcounts[i], mpi_errno);
break;
}
}
/* catch common aliasing cases */
if (recvbuf != MPI_IN_PLACE && sendtype == recvtype &&
sendcounts[comm_ptr->rank] != 0 && recvcount != 0) {
int sendtype_size;
MPIR_Datatype_get_size_macro(sendtype, sendtype_size);
MPIR_ERRTEST_ALIAS_COLL(recvbuf,
(char *) sendbuf +
displs[comm_ptr->rank] * sendtype_size, mpi_errno);
}
} else
MPIR_ERRTEST_RECVBUF_INPLACE(recvbuf, recvcount, mpi_errno);
if (recvbuf != MPI_IN_PLACE) {
MPIR_ERRTEST_COUNT(recvcount, mpi_errno);
MPIR_ERRTEST_DATATYPE(recvtype, "recvtype", mpi_errno);
if (HANDLE_GET_KIND(recvtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype_get_ptr(recvtype, recvtype_ptr);
MPIR_Datatype_valid_ptr(recvtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
MPIR_Datatype_committed_ptr(recvtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
MPIR_ERRTEST_USERBUFFER(recvbuf, recvcount, recvtype, mpi_errno);
}
}
if (comm_ptr->comm_kind == MPIR_COMM_KIND__INTERCOMM) {
MPIR_ERRTEST_INTER_ROOT(comm_ptr, root, mpi_errno);
if (root == MPI_ROOT) {
comm_size = comm_ptr->remote_size;
for (i = 0; i < comm_size; i++) {
MPIR_ERRTEST_COUNT(sendcounts[i], mpi_errno);
MPIR_ERRTEST_DATATYPE(sendtype, "sendtype", mpi_errno);
}
if (HANDLE_GET_KIND(sendtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype_get_ptr(sendtype, sendtype_ptr);
MPIR_Datatype_valid_ptr(sendtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
MPIR_Datatype_committed_ptr(sendtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
for (i = 0; i < comm_size; i++) {
if (sendcounts[i] > 0) {
MPIR_ERRTEST_SENDBUF_INPLACE(sendbuf, sendcounts[i], mpi_errno);
MPIR_ERRTEST_USERBUFFER(sendbuf, sendcounts[i], sendtype, mpi_errno);
break;
}
}
} else if (root != MPI_PROC_NULL) {
MPIR_ERRTEST_COUNT(recvcount, mpi_errno);
MPIR_ERRTEST_DATATYPE(recvtype, "recvtype", mpi_errno);
if (HANDLE_GET_KIND(recvtype) != HANDLE_KIND_BUILTIN) {
MPIR_Datatype_get_ptr(recvtype, recvtype_ptr);
MPIR_Datatype_valid_ptr(recvtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
MPIR_Datatype_committed_ptr(recvtype_ptr, mpi_errno);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
MPIR_ERRTEST_RECVBUF_INPLACE(recvbuf, recvcount, mpi_errno);
MPIR_ERRTEST_USERBUFFER(recvbuf, recvcount, recvtype, mpi_errno);
}
}
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPIR_Iscatterv(sendbuf, sendcounts, displs, sendtype, recvbuf, recvcount, recvtype,
root, comm_ptr, &request_ptr);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* create a complete request, if needed */
if (!request_ptr)
request_ptr = MPIR_Request_create_complete(MPIR_REQUEST_KIND__COLL);
/* return the handle of the request to the user */
*request = request_ptr->handle;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_ISCATTERV);
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
#ifdef HAVE_ERROR_CHECKING
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_iscatterv", "**mpi_iscatterv %p %p %p %D %p %d %D %d %C %p",
sendbuf, sendcounts, displs, sendtype, recvbuf, recvcount,
recvtype, root, comm, request);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}