int MPIC_Sendrecv_replace(void *buf, int count, MPI_Datatype datatype,
int dest, int sendtag,
int source, int recvtag,
MPI_Comm comm, MPI_Status *status)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Context_id_t context_id_offset;
MPID_Request *sreq;
MPID_Request *rreq;
void *tmpbuf = NULL;
int tmpbuf_size = 0;
int tmpbuf_count = 0;
MPID_Comm *comm_ptr;
MPIU_CHKLMEM_DECL(1);
MPIDI_STATE_DECL(MPID_STATE_MPIC_SENDRECV_REPLACE);
#ifdef MPID_LOG_ARROWS
/* The logging macros log sendcount and recvcount */
int sendcount = count, recvcount = count;
#endif
MPIDI_PT2PT_FUNC_ENTER_BOTH(MPID_STATE_MPIC_SENDRECV_REPLACE);
MPID_Comm_get_ptr( comm, comm_ptr );
context_id_offset = (comm_ptr->comm_kind == MPID_INTRACOMM) ?
MPID_CONTEXT_INTRA_COLL : MPID_CONTEXT_INTER_COLL;
if (count > 0 && dest != MPI_PROC_NULL)
{
MPIR_Pack_size_impl(count, datatype, &tmpbuf_size);
MPIU_CHKLMEM_MALLOC(tmpbuf, void *, tmpbuf_size, mpi_errno, "temporary send buffer");
mpi_errno = MPIR_Pack_impl(buf, count, datatype, tmpbuf, tmpbuf_size, &tmpbuf_count);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
int MPID_nem_ptl_init_id(MPIDI_VC_t *vc)
{
int mpi_errno = MPI_SUCCESS;
MPID_nem_ptl_vc_area *const vc_ptl = VC_PTL(vc);
char *bc;
int pmi_errno;
int val_max_sz;
MPIU_CHKLMEM_DECL(1);
MPIDI_STATE_DECL(MPID_STATE_MPID_NEM_PTL_INIT_ID);
MPIDI_FUNC_ENTER(MPID_STATE_MPID_NEM_PTL_INIT_ID);
pmi_errno = PMI_KVS_Get_value_length_max(&val_max_sz);
MPIU_ERR_CHKANDJUMP1(pmi_errno, mpi_errno, MPI_ERR_OTHER, "**fail", "**fail %d", pmi_errno);
MPIU_CHKLMEM_MALLOC(bc, char *, val_max_sz, mpi_errno, "bc");
mpi_errno = vc->pg->getConnInfo(vc->pg_rank, bc, val_max_sz, vc->pg);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mpi_errno = MPID_nem_ptl_get_id_from_bc(bc, &vc_ptl->id, &vc_ptl->pt, &vc_ptl->ptg, &vc_ptl->ptc, &vc_ptl->ptr, &vc_ptl->ptrg, &vc_ptl->ptrc);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
vc_ptl->id_initialized = TRUE;
MPIDI_CHANGE_VC_STATE(vc, ACTIVE);
fn_exit:
MPIU_CHKLMEM_FREEALL();
MPIDI_FUNC_EXIT(MPID_STATE_MPID_NEM_PTL_INIT_ID);
return mpi_errno;
fn_fail:
goto fn_exit;
}
static int get_addr(MPIDI_VC_t * vc, struct scif_portID *addr)
{
int mpi_errno = MPI_SUCCESS;
char *bc;
int pmi_errno;
int val_max_sz;
MPIU_CHKLMEM_DECL(1);
/* Allocate space for the business card */
pmi_errno = PMI_KVS_Get_value_length_max(&val_max_sz);
MPIU_ERR_CHKANDJUMP1(pmi_errno, mpi_errno, MPI_ERR_OTHER, "**fail",
"**fail %d", pmi_errno);
MPIU_CHKLMEM_MALLOC(bc, char *, val_max_sz, mpi_errno, "bc");
mpi_errno = vc->pg->getConnInfo(vc->pg_rank, bc, val_max_sz, vc->pg);
if (mpi_errno)
MPIU_ERR_POP(mpi_errno);
mpi_errno = scif_addr_from_bc(bc, &addr->node, &addr->port);
if (mpi_errno)
MPIU_ERR_POP(mpi_errno);
fn_exit:
MPIU_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
/*@
MPI_Waitsome - Waits for some given MPI Requests to complete
Input Parameters:
+ incount - length of array_of_requests (integer)
- array_of_requests - array of requests (array of handles)
Output Parameters:
+ outcount - number of completed requests (integer)
. array_of_indices - array of indices of operations that
completed (array of integers)
- array_of_statuses - array of status objects for
operations that completed (array of Status). May be 'MPI_STATUSES_IGNORE'.
Notes:
The array of indicies are in the range '0' to 'incount - 1' for C and
in the range '1' to 'incount' for Fortran.
Null requests are ignored; if all requests are null, then the routine
returns with 'outcount' set to 'MPI_UNDEFINED'.
While it is possible to list a request handle more than once in the
array_of_requests, such an action is considered erroneous and may cause the
program to unexecpectedly terminate or produce incorrect results.
'MPI_Waitsome' provides an interface much like the Unix 'select' or 'poll'
calls and, in a high qualilty implementation, indicates all of the requests
that have completed when 'MPI_Waitsome' is called.
However, 'MPI_Waitsome' only guarantees that at least one
request has completed; there is no guarantee that `all` completed requests
will be returned, or that the entries in 'array_of_indices' will be in
increasing order. Also, requests that are completed while 'MPI_Waitsome' is
executing may or may not be returned, depending on the timing of the
completion of the message.
.N waitstatus
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_REQUEST
.N MPI_ERR_ARG
.N MPI_ERR_IN_STATUS
@*/
int MPI_Waitsome(int incount, MPI_Request array_of_requests[],
int *outcount, int array_of_indices[],
MPI_Status array_of_statuses[])
{
static const char FCNAME[] = "MPI_Waitsome";
MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
MPID_Request ** request_ptrs = request_ptr_array;
MPI_Status * status_ptr;
MPID_Progress_state progress_state;
int i;
int n_active;
int n_inactive;
int active_flag;
int rc;
int disabled_anysource = FALSE;
int mpi_errno = MPI_SUCCESS;
MPIU_CHKLMEM_DECL(1);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_WAITSOME);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPID_MPI_PT2PT_FUNC_ENTER(MPID_STATE_MPI_WAITSOME);
/* Check the arguments */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COUNT(incount, mpi_errno);
if (incount != 0) {
MPIR_ERRTEST_ARGNULL(array_of_requests, "array_of_requests", mpi_errno);
MPIR_ERRTEST_ARGNULL(array_of_indices, "array_of_indices", mpi_errno);
/* NOTE: MPI_STATUSES_IGNORE != NULL */
MPIR_ERRTEST_ARGNULL(array_of_statuses, "array_of_statuses", mpi_errno);
}
MPIR_ERRTEST_ARGNULL(outcount, "outcount", mpi_errno);
for (i = 0; i < incount; i++) {
MPIR_ERRTEST_ARRAYREQUEST_OR_NULL(array_of_requests[i], i, mpi_errno);
}
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
*outcount = 0;
/* Convert MPI request handles to a request object pointers */
if (incount > MPID_REQUEST_PTR_ARRAY_SIZE)
{
MPIU_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPID_Request **, incount * sizeof(MPID_Request *), mpi_errno, "request pointers");
}
int MPIR_Scan(
const void *sendbuf,
void *recvbuf,
int count,
MPI_Datatype datatype,
MPI_Op op,
MPID_Comm *comm_ptr,
int *errflag )
{
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
MPIU_CHKLMEM_DECL(3);
MPIU_THREADPRIV_DECL;
int rank = comm_ptr->rank;
MPI_Status status;
void *tempbuf = NULL, *localfulldata = NULL, *prefulldata = NULL;
MPI_Aint true_lb, true_extent, extent;
int noneed = 1; /* noneed=1 means no need to bcast tempbuf and
reduce tempbuf & recvbuf */
/* In order to use the SMP-aware algorithm, the "op" can be
either commutative or non-commutative, but we require a
communicator in which all the nodes contain processes with
consecutive ranks. */
if (!MPIR_Comm_is_node_consecutive(comm_ptr)) {
/* We can't use the SMP-aware algorithm, use the generic one */
return MPIR_Scan_generic(sendbuf, recvbuf, count, datatype, op, comm_ptr, errflag);
}
MPIU_THREADPRIV_GET;
MPIR_Type_get_true_extent_impl(datatype, &true_lb, &true_extent);
MPID_Datatype_get_extent_macro(datatype, extent);
MPID_Ensure_Aint_fits_in_pointer(count * MPIR_MAX(extent, true_extent));
MPIU_CHKLMEM_MALLOC(tempbuf, void *, count*(MPIR_MAX(extent, true_extent)),
mpi_errno, "temporary buffer");
tempbuf = (void *)((char*)tempbuf - true_lb);
/* Create prefulldata and localfulldata on local roots of all nodes */
if (comm_ptr->node_roots_comm != NULL) {
MPIU_CHKLMEM_MALLOC(prefulldata, void *, count*(MPIR_MAX(extent, true_extent)),
mpi_errno, "prefulldata for scan");
prefulldata = (void *)((char*)prefulldata - true_lb);
if (comm_ptr->node_comm != NULL) {
MPIU_CHKLMEM_MALLOC(localfulldata, void *, count*(MPIR_MAX(extent, true_extent)),
mpi_errno, "localfulldata for scan");
localfulldata = (void *)((char*)localfulldata - true_lb);
}
/*@
MPI_Testall - Tests for the completion of all previously initiated
requests
Input Parameters:
+ count - lists length (integer)
- array_of_requests - array of requests (array of handles)
Output Parameters:
+ flag - True if all requests have completed; false otherwise (logical)
- array_of_statuses - array of status objects (array of Status). May be
'MPI_STATUSES_IGNORE'.
Notes:
'flag' is true only if all requests have completed. Otherwise, flag is
false and neither the 'array_of_requests' nor the 'array_of_statuses' is
modified.
If one or more of the requests completes with an error, 'MPI_ERR_IN_STATUS' is
returned. An error value will be present is elements of 'array_of_status'
associated with the requests. Likewise, the 'MPI_ERROR' field in the status
elements associated with requests that have successfully completed will be
'MPI_SUCCESS'. Finally, those requests that have not completed will have a
value of 'MPI_ERR_PENDING'.
While it is possible to list a request handle more than once in the
'array_of_requests', such an action is considered erroneous and may cause the
program to unexecpectedly terminate or produce incorrect results.
.N ThreadSafe
.N waitstatus
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_IN_STATUS
.N MPI_ERR_REQUEST
.N MPI_ERR_ARG
@*/
int MPI_Testall(int count, MPI_Request array_of_requests[], int *flag,
MPI_Status array_of_statuses[])
{
static const char FCNAME[] = "MPI_Testall";
MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
MPID_Request ** request_ptrs = request_ptr_array;
MPI_Status * status_ptr;
int i;
int n_completed;
int active_flag;
int rc;
int proc_failure = 0;
int mpi_errno = MPI_SUCCESS;
MPIU_CHKLMEM_DECL(1);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_TESTALL);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIU_THREAD_CS_ENTER(ALLFUNC,);
MPID_MPI_PT2PT_FUNC_ENTER(MPID_STATE_MPI_TESTALL);
/* Check the arguments */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COUNT(count, mpi_errno);
if (count != 0) {
MPIR_ERRTEST_ARGNULL(array_of_requests, "array_of_requests", mpi_errno);
/* NOTE: MPI_STATUSES_IGNORE != NULL */
MPIR_ERRTEST_ARGNULL(array_of_statuses, "array_of_statuses", mpi_errno);
}
MPIR_ERRTEST_ARGNULL(flag, "flag", mpi_errno);
for (i = 0; i < count; i++) {
MPIR_ERRTEST_ARRAYREQUEST_OR_NULL(array_of_requests[i], i, mpi_errno);
}
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
/* Convert MPI request handles to a request object pointers */
if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
{
MPIU_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPID_Request **,
count * sizeof(MPID_Request *), mpi_errno, "request pointers");
}
static int MPIR_Reduce_binomial (
const void *sendbuf,
void *recvbuf,
int count,
MPI_Datatype datatype,
MPI_Op op,
int root,
MPID_Comm *comm_ptr,
int *errflag )
{
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
MPI_Status status;
int comm_size, rank, is_commutative, type_size ATTRIBUTE((unused));
int mask, relrank, source, lroot;
MPI_Aint true_lb, true_extent, extent;
void *tmp_buf;
MPI_Comm comm;
MPIU_CHKLMEM_DECL(2);
if (count == 0) return MPI_SUCCESS;
comm = comm_ptr->handle;
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
/* Create a temporary buffer */
MPIR_Type_get_true_extent_impl(datatype, &true_lb, &true_extent);
MPID_Datatype_get_extent_macro(datatype, extent);
is_commutative = MPIR_Op_is_commutative(op);
/* I think this is the worse case, so we can avoid an assert()
* inside the for loop */
/* should be buf+{this}? */
MPID_Ensure_Aint_fits_in_pointer(count * MPIR_MAX(extent, true_extent));
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, count*(MPIR_MAX(extent,true_extent)),
mpi_errno, "temporary buffer");
/* adjust for potential negative lower bound in datatype */
tmp_buf = (void *)((char*)tmp_buf - true_lb);
/* If I'm not the root, then my recvbuf may not be valid, therefore
I have to allocate a temporary one */
if (rank != root) {
MPIU_CHKLMEM_MALLOC(recvbuf, void *,
count*(MPIR_MAX(extent,true_extent)),
mpi_errno, "receive buffer");
recvbuf = (void *)((char*)recvbuf - true_lb);
}
int MPIR_Type_indexed_impl(int count, const int *array_of_blocklengths,
const int *array_of_displacements,
MPI_Datatype oldtype, MPI_Datatype *newtype)
{
int mpi_errno = MPI_SUCCESS;
MPI_Datatype new_handle;
MPID_Datatype *new_dtp;
int i, *ints;
MPIU_CHKLMEM_DECL(1);
mpi_errno = MPID_Type_indexed(count,
array_of_blocklengths,
array_of_displacements,
0, /* displacements not in bytes */
oldtype,
&new_handle);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* copy all integer values into a temporary buffer; this
* includes the count, the blocklengths, and the displacements.
*/
MPIU_CHKLMEM_MALLOC(ints, int *, (2 * count + 1) * sizeof(int), mpi_errno, "contents integer array");
ints[0] = count;
for (i=0; i < count; i++) {
ints[i+1] = array_of_blocklengths[i];
}
for (i=0; i < count; i++) {
ints[i + count + 1] = array_of_displacements[i];
}
MPID_Datatype_get_ptr(new_handle, new_dtp);
mpi_errno = MPID_Datatype_set_contents(new_dtp,
MPI_COMBINER_INDEXED,
2*count + 1, /* ints */
0, /* aints */
1, /* types */
ints,
NULL,
&oldtype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_OBJ_PUBLISH_HANDLE(*newtype, new_handle);
fn_exit:
MPIU_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
int MPIC_Sendrecv_replace(void *buf, int count, MPI_Datatype datatype,
int dest, int sendtag,
int source, int recvtag,
MPID_Comm *comm_ptr, MPI_Status *status, mpir_errflag_t *errflag)
{
int mpi_errno = MPI_SUCCESS;
MPI_Status mystatus;
MPIR_Context_id_t context_id_offset;
MPID_Request *sreq = NULL;
MPID_Request *rreq = NULL;
void *tmpbuf = NULL;
MPI_Aint tmpbuf_size = 0;
MPI_Aint tmpbuf_count = 0;
MPIU_CHKLMEM_DECL(1);
MPIDI_STATE_DECL(MPID_STATE_MPIC_SENDRECV_REPLACE);
#ifdef MPID_LOG_ARROWS
/* The logging macros log sendcount and recvcount */
int sendcount = count, recvcount = count;
#endif
MPIDI_FUNC_ENTER(MPID_STATE_MPIC_SENDRECV_REPLACE);
MPIU_DBG_MSG_D(PT2PT, TYPICAL, "IN: errflag = %d", *errflag);
MPIU_ERR_CHKANDJUMP1((count < 0), mpi_errno, MPI_ERR_COUNT,
"**countneg", "**countneg %d", count);
if (status == MPI_STATUS_IGNORE) status = &mystatus;
switch(*errflag) {
case MPIR_ERR_NONE:
break;
case MPIR_ERR_PROC_FAILED:
MPIR_TAG_SET_PROC_FAILURE_BIT(sendtag);
default:
MPIR_TAG_SET_ERROR_BIT(sendtag);
}
context_id_offset = (comm_ptr->comm_kind == MPID_INTRACOMM) ?
MPID_CONTEXT_INTRA_COLL : MPID_CONTEXT_INTER_COLL;
if (count > 0 && dest != MPI_PROC_NULL) {
MPIR_Pack_size_impl(count, datatype, &tmpbuf_size);
MPIU_CHKLMEM_MALLOC(tmpbuf, void *, tmpbuf_size, mpi_errno, "temporary send buffer");
mpi_errno = MPIR_Pack_impl(buf, count, datatype, tmpbuf, tmpbuf_size, &tmpbuf_count);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
/*@
MPI_Waitany - Waits for any specified MPI Request to complete
Input Parameters:
+ count - list length (integer)
- array_of_requests - array of requests (array of handles)
Output Parameters:
+ indx - index of handle for operation that completed (integer). In the
range '0' to 'count-1'. In Fortran, the range is '1' to 'count'.
- status - status object (Status). May be 'MPI_STATUS_IGNORE'.
Notes:
If all of the requests are 'MPI_REQUEST_NULL', then 'indx' is returned as
'MPI_UNDEFINED', and 'status' is returned as an empty status.
While it is possible to list a request handle more than once in the
array_of_requests, such an action is considered erroneous and may cause the
program to unexecpectedly terminate or produce incorrect results.
.N waitstatus
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_REQUEST
.N MPI_ERR_ARG
@*/
int MPI_Waitany(int count, MPI_Request array_of_requests[], int *indx,
MPI_Status *status)
{
static const char FCNAME[] = "MPI_Waitany";
MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
MPID_Request ** request_ptrs = request_ptr_array;
MPID_Progress_state progress_state;
int i;
int n_inactive;
int active_flag;
int init_req_array;
int found_nonnull_req;
int last_disabled_anysource = -1;
int mpi_errno = MPI_SUCCESS;
MPIU_CHKLMEM_DECL(1);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_WAITANY);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIU_THREAD_CS_ENTER(ALLFUNC,);
MPID_MPI_PT2PT_FUNC_ENTER(MPID_STATE_MPI_WAITANY);
/* Check the arguments */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COUNT(count, mpi_errno);
if (count != 0) {
MPIR_ERRTEST_ARGNULL(array_of_requests, "array_of_requests", mpi_errno);
/* NOTE: MPI_STATUS_IGNORE != NULL */
MPIR_ERRTEST_ARGNULL(status, "status", mpi_errno);
}
MPIR_ERRTEST_ARGNULL(indx, "indx", mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
/* Convert MPI request handles to a request object pointers */
if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
{
MPIU_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPID_Request **, count * sizeof(MPID_Request *), mpi_errno, "request pointers");
}
int MPIR_Ineighbor_allgatherv_default(const void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, const int recvcounts[], const int displs[], MPI_Datatype recvtype, MPID_Comm *comm_ptr, MPID_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
int indegree, outdegree, weighted;
int i, k,l;
int *srcs, *dsts;
int comm_size;
MPI_Aint recvtype_extent;
MPIU_CHKLMEM_DECL(2);
comm_size = comm_ptr->local_size;
MPID_Datatype_get_extent_macro(recvtype, recvtype_extent);
for (i = 0; i < comm_size; ++i) {
MPID_Ensure_Aint_fits_in_pointer(MPI_VOID_PTR_CAST_TO_MPI_AINT recvbuf +
(displs[i] * recvtype_extent));
}
mpi_errno = MPIR_Topo_canon_nhb_count(comm_ptr, &indegree, &outdegree, &weighted);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_CHKLMEM_MALLOC(srcs, int *, indegree*sizeof(int), mpi_errno, "srcs");
MPIU_CHKLMEM_MALLOC(dsts, int *, outdegree*sizeof(int), mpi_errno, "dsts");
mpi_errno = MPIR_Topo_canon_nhb(comm_ptr,
indegree, srcs, MPI_UNWEIGHTED,
outdegree, dsts, MPI_UNWEIGHTED);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
for (k = 0; k < outdegree; ++k) {
mpi_errno = MPID_Sched_send(sendbuf, sendcount, sendtype, dsts[k], comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
for (l = 0; l < indegree; ++l) {
char *rb = ((char *)recvbuf) + displs[l] * recvtype_extent;
mpi_errno = MPID_Sched_recv(rb, recvcounts[l], recvtype, srcs[l], comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
MPID_SCHED_BARRIER(s);
fn_exit:
MPIU_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
int MPIR_Type_create_struct_impl(int count,
int array_of_blocklengths[],
MPI_Aint array_of_displacements[],
MPI_Datatype array_of_types[],
MPI_Datatype *newtype)
{
int mpi_errno = MPI_SUCCESS;
int i, *ints;
MPI_Datatype new_handle;
MPID_Datatype *new_dtp;
MPIU_CHKLMEM_DECL(1);
mpi_errno = MPID_Type_struct(count,
array_of_blocklengths,
array_of_displacements,
array_of_types,
&new_handle);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_CHKLMEM_MALLOC_ORJUMP(ints, int *, (count + 1) * sizeof(int), mpi_errno, "content description");
ints[0] = count;
for (i=0; i < count; i++)
ints[i+1] = array_of_blocklengths[i];
MPID_Datatype_get_ptr(new_handle, new_dtp);
mpi_errno = MPID_Datatype_set_contents(new_dtp,
MPI_COMBINER_STRUCT,
count+1, /* ints (cnt,blklen) */
count, /* aints (disps) */
count, /* types */
ints,
array_of_displacements,
array_of_types);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_OBJ_PUBLISH_HANDLE(*newtype, new_handle);
fn_exit:
MPIU_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
/* this function is not used in pmi2 */
static int publish_node_id(MPIDI_PG_t *pg, int our_pg_rank)
{
int mpi_errno = MPI_SUCCESS;
int pmi_errno;
int ret;
char *key;
int key_max_sz;
char *kvs_name;
MPIU_CHKLMEM_DECL(1);
/* set MPIU_hostname */
ret = gethostname(MPIU_hostname, MAX_HOSTNAME_LEN);
MPIR_ERR_CHKANDJUMP2(ret == -1, mpi_errno, MPI_ERR_OTHER, "**sock_gethost", "**sock_gethost %s %d", MPIU_Strerror(errno), errno);
MPIU_hostname[MAX_HOSTNAME_LEN-1] = '\0';
/* Allocate space for pmi key */
pmi_errno = PMI_KVS_Get_key_length_max(&key_max_sz);
MPIR_ERR_CHKANDJUMP1(pmi_errno, mpi_errno, MPI_ERR_OTHER, "**fail", "**fail %d", pmi_errno);
MPIU_CHKLMEM_MALLOC(key, char *, key_max_sz, mpi_errno, "key");
mpi_errno = MPIDI_PG_GetConnKVSname(&kvs_name);
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
/* Put my hostname id */
if (pg->size > 1)
{
memset(key, 0, key_max_sz);
MPL_snprintf(key, key_max_sz, "hostname[%d]", our_pg_rank);
pmi_errno = PMI_KVS_Put(kvs_name, key, MPIU_hostname);
MPIR_ERR_CHKANDJUMP1(pmi_errno != PMI_SUCCESS, mpi_errno, MPI_ERR_OTHER, "**pmi_kvs_put", "**pmi_kvs_put %d", pmi_errno);
pmi_errno = PMI_KVS_Commit(kvs_name);
MPIR_ERR_CHKANDJUMP1(pmi_errno != PMI_SUCCESS, mpi_errno, MPI_ERR_OTHER, "**pmi_kvs_commit", "**pmi_kvs_commit %d", pmi_errno);
pmi_errno = PMI_Barrier();
MPIR_ERR_CHKANDJUMP1(pmi_errno != PMI_SUCCESS, mpi_errno, MPI_ERR_OTHER, "**pmi_barrier", "**pmi_barrier %d", pmi_errno);
}
fn_exit:
MPIU_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
int MPIR_Ineighbor_alltoallw_default(const void *sendbuf, const int sendcounts[], const MPI_Aint sdispls[], const MPI_Datatype sendtypes[], void *recvbuf, const int recvcounts[], const MPI_Aint rdispls[], const MPI_Datatype recvtypes[], MPID_Comm *comm_ptr, MPID_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
int indegree, outdegree, weighted;
int k,l;
int *srcs, *dsts;
MPIU_CHKLMEM_DECL(2);
mpi_errno = MPIR_Topo_canon_nhb_count(comm_ptr, &indegree, &outdegree, &weighted);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_CHKLMEM_MALLOC(srcs, int *, indegree*sizeof(int), mpi_errno, "srcs");
MPIU_CHKLMEM_MALLOC(dsts, int *, outdegree*sizeof(int), mpi_errno, "dsts");
mpi_errno = MPIR_Topo_canon_nhb(comm_ptr,
indegree, srcs, MPI_UNWEIGHTED,
outdegree, dsts, MPI_UNWEIGHTED);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
for (k = 0; k < outdegree; ++k) {
char *sb;
MPID_Ensure_Aint_fits_in_pointer(MPI_VOID_PTR_CAST_TO_MPI_AINT sendbuf + sdispls[k]);
sb = ((char *)sendbuf) + sdispls[k];
mpi_errno = MPID_Sched_send(sb, sendcounts[k], sendtypes[k], dsts[k], comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
for (l = 0; l < indegree; ++l) {
char *rb;
MPID_Ensure_Aint_fits_in_pointer(MPI_VOID_PTR_CAST_TO_MPI_AINT recvbuf + rdispls[l]);
rb = ((char *)recvbuf) + rdispls[l];
mpi_errno = MPID_Sched_recv(rb, recvcounts[l], recvtypes[l], srcs[l], comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
MPID_SCHED_BARRIER(s);
fn_exit:
MPIU_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}
int MPIR_Testall_impl(int count, MPI_Request array_of_requests[], int *flag,
MPI_Status array_of_statuses[])
{
MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
MPID_Request ** request_ptrs = request_ptr_array;
MPI_Status * status_ptr;
int i;
int n_completed;
int active_flag;
int rc;
int proc_failure = FALSE;
int mpi_errno = MPI_SUCCESS;
MPIU_CHKLMEM_DECL(1);
/* Convert MPI request handles to a request object pointers */
if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
{
MPIU_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPID_Request **,
count * sizeof(MPID_Request *), mpi_errno, "request pointers");
}
/*@
MPI_Startall - Starts a collection of persistent requests
Input Parameters:
+ count - list length (integer)
- array_of_requests - array of requests (array of handle)
Notes:
Unlike 'MPI_Waitall', 'MPI_Startall' does not provide a mechanism for
returning multiple errors nor pinpointing the request(s) involved.
Futhermore, the behavior of 'MPI_Startall' after an error occurs is not
defined by the MPI standard. If well-defined error reporting and behavior
are required, multiple calls to 'MPI_Start' should be used instead.
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_REQUEST
@*/
int MPI_Startall(int count, MPI_Request array_of_requests[])
{
static const char FCNAME[] = "MPI_Startall";
MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
MPID_Request ** request_ptrs = request_ptr_array;
int i;
int mpi_errno = MPI_SUCCESS;
MPIU_CHKLMEM_DECL(1);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_STARTALL);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIU_THREAD_CS_ENTER(ALLFUNC,);
MPID_MPI_PT2PT_FUNC_ENTER(MPID_STATE_MPI_STARTALL);
/* Validate handle parameters needing to be converted */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COUNT(count, mpi_errno);
MPIR_ERRTEST_ARGNULL(array_of_requests,"array_of_requests", mpi_errno);
if (mpi_errno != MPI_SUCCESS) goto fn_fail;
for (i = 0; i < count; i++)
{
MPIR_ERRTEST_REQUEST(array_of_requests[i], mpi_errno);
}
if (mpi_errno != MPI_SUCCESS) goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* Convert MPI request handles to a request object pointers */
if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
{
MPIU_CHKLMEM_MALLOC_ORJUMP(request_ptrs, MPID_Request **, count * sizeof(MPID_Request *), mpi_errno, "request pointers");
}
PMPI_LOCAL int MPIR_CheckDisjointLpids( int lpids1[], int n1,
int lpids2[], int n2 )
{
int i, mask_size, idx, bit, maxlpid = -1;
int mpi_errno = MPI_SUCCESS;
uint32_t lpidmaskPrealloc[N_STATIC_LPID32];
uint32_t *lpidmask;
MPIU_CHKLMEM_DECL(1);
/* Find the max lpid */
for (i=0; i<n1; i++) {
if (lpids1[i] > maxlpid) maxlpid = lpids1[i];
}
for (i=0; i<n2; i++) {
if (lpids2[i] > maxlpid) maxlpid = lpids2[i];
}
mask_size = (maxlpid / 32) + 1;
if (mask_size > N_STATIC_LPID32) {
MPIU_CHKLMEM_MALLOC(lpidmask,uint32_t*,mask_size*sizeof(uint32_t),
mpi_errno,"lpidmask");
}
int MPIR_Waitall_impl(int count, MPI_Request array_of_requests[],
MPI_Status array_of_statuses[])
{
int mpi_errno = MPI_SUCCESS;
MPID_Request * request_ptr_array[MPID_REQUEST_PTR_ARRAY_SIZE];
MPID_Request ** request_ptrs = request_ptr_array;
MPI_Status * status_ptr;
MPID_Progress_state progress_state;
int i, j;
int n_completed;
int active_flag;
int rc;
int n_greqs;
int proc_failure = FALSE;
int disabled_anysource = FALSE;
const int ignoring_statuses = (array_of_statuses == MPI_STATUSES_IGNORE);
int optimize = ignoring_statuses; /* see NOTE-O1 */
MPIU_CHKLMEM_DECL(1);
/* Convert MPI request handles to a request object pointers */
if (count > MPID_REQUEST_PTR_ARRAY_SIZE)
{
MPIU_CHKLMEM_MALLOC(request_ptrs, MPID_Request **, count * sizeof(MPID_Request *), mpi_errno, "request pointers");
}
PMPI_LOCAL int MPIR_CheckDisjointLpids( int lpids1[], int n1,
int lpids2[], int n2 )
{
int i, maxi, idx, bit, maxlpid = -1;
int mpi_errno = MPI_SUCCESS;
int32_t lpidmaskPrealloc[MAX_LPID32_ARRAY];
int32_t *lpidmask;
MPIU_CHKLMEM_DECL(1);
/* Find the max lpid */
for (i=0; i<n1; i++) {
if (lpids1[i] > maxlpid) maxlpid = lpids1[i];
}
for (i=0; i<n2; i++) {
if (lpids2[i] > maxlpid) maxlpid = lpids2[i];
}
/* Compute the max index and zero the pids array */
maxi = (maxlpid + 31) / 32;
if (maxi >= MAX_LPID32_ARRAY) {
MPIU_CHKLMEM_MALLOC(lpidmask,int32_t*,maxi*sizeof(int32_t),
mpi_errno,"lpidmask");
}
int MPIR_Scatter_intra(const void *sendbuf, int sendcount, MPI_Datatype sendtype,
void *recvbuf, int recvcount, MPI_Datatype recvtype, int root,
MPID_Comm *comm_ptr, int *errflag)
{
MPI_Status status;
MPI_Aint extent=0;
int rank, comm_size, is_homogeneous, sendtype_size;
int curr_cnt, relative_rank, nbytes, send_subtree_cnt;
int mask, recvtype_size=0, src, dst;
int tmp_buf_size = 0;
void *tmp_buf=NULL;
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
MPI_Comm comm;
MPIU_CHKLMEM_DECL(4);
comm = comm_ptr->handle;
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
if ( ((rank == root) && (sendcount == 0)) ||
((rank != root) && (recvcount == 0)) )
return MPI_SUCCESS;
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_ENTER( comm_ptr );
is_homogeneous = 1;
#ifdef MPID_HAS_HETERO
if (comm_ptr->is_hetero)
is_homogeneous = 0;
#endif
/* Use binomial tree algorithm */
if (rank == root)
MPID_Datatype_get_extent_macro(sendtype, extent);
relative_rank = (rank >= root) ? rank - root : rank - root + comm_size;
if (is_homogeneous) {
/* communicator is homogeneous */
if (rank == root) {
/* We separate the two cases (root and non-root) because
in the event of recvbuf=MPI_IN_PLACE on the root,
recvcount and recvtype are not valid */
MPID_Datatype_get_size_macro(sendtype, sendtype_size);
MPID_Ensure_Aint_fits_in_pointer(MPI_VOID_PTR_CAST_TO_MPI_AINT sendbuf +
extent*sendcount*comm_size);
nbytes = sendtype_size * sendcount;
}
else {
MPID_Datatype_get_size_macro(recvtype, recvtype_size);
MPID_Ensure_Aint_fits_in_pointer(extent*recvcount*comm_size);
nbytes = recvtype_size * recvcount;
}
curr_cnt = 0;
/* all even nodes other than root need a temporary buffer to
receive data of max size (nbytes*comm_size)/2 */
if (relative_rank && !(relative_rank % 2)) {
tmp_buf_size = (nbytes*comm_size)/2;
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, tmp_buf_size, mpi_errno, "tmp_buf");
}
/* if the root is not rank 0, we reorder the sendbuf in order of
relative ranks and copy it into a temporary buffer, so that
all the sends from the root are contiguous and in the right
order. */
if (rank == root) {
if (root != 0) {
tmp_buf_size = nbytes*comm_size;
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, tmp_buf_size, mpi_errno, "tmp_buf");
if (recvbuf != MPI_IN_PLACE)
mpi_errno = MPIR_Localcopy(((char *) sendbuf + extent*sendcount*rank),
sendcount*(comm_size-rank), sendtype, tmp_buf,
nbytes*(comm_size-rank), MPI_BYTE);
else
mpi_errno = MPIR_Localcopy(((char *) sendbuf + extent*sendcount*(rank+1)),
sendcount*(comm_size-rank-1),
sendtype, (char *)tmp_buf + nbytes,
nbytes*(comm_size-rank-1), MPI_BYTE);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mpi_errno = MPIR_Localcopy(sendbuf, sendcount*rank, sendtype,
((char *) tmp_buf + nbytes*(comm_size-rank)),
nbytes*rank, MPI_BYTE);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
curr_cnt = nbytes*comm_size;
}
else
int MPIR_Alltoall_intra(
const void *sendbuf,
int sendcount,
MPI_Datatype sendtype,
void *recvbuf,
int recvcount,
MPI_Datatype recvtype,
MPID_Comm *comm_ptr,
int *errflag )
{
int comm_size, i, j, pof2;
MPI_Aint sendtype_extent, recvtype_extent;
MPI_Aint recvtype_true_extent, recvbuf_extent, recvtype_true_lb;
int mpi_errno=MPI_SUCCESS, src, dst, rank, nbytes;
int mpi_errno_ret = MPI_SUCCESS;
MPI_Status status;
int sendtype_size, pack_size, block, position, *displs, count;
MPI_Datatype newtype = MPI_DATATYPE_NULL;
void *tmp_buf;
MPI_Comm comm;
MPI_Request *reqarray;
MPI_Status *starray;
MPIU_CHKLMEM_DECL(6);
#ifdef MPIR_OLD_SHORT_ALLTOALL_ALG
MPI_Aint sendtype_true_extent, sendbuf_extent, sendtype_true_lb;
int k, p, curr_cnt, dst_tree_root, my_tree_root;
int last_recv_cnt, mask, tmp_mask, tree_root, nprocs_completed;
#endif
if (recvcount == 0) return MPI_SUCCESS;
comm = comm_ptr->handle;
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
/* Get extent of send and recv types */
MPID_Datatype_get_extent_macro(recvtype, recvtype_extent);
MPID_Datatype_get_extent_macro(sendtype, sendtype_extent);
MPID_Datatype_get_size_macro(sendtype, sendtype_size);
nbytes = sendtype_size * sendcount;
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_ENTER( comm_ptr );
if (sendbuf == MPI_IN_PLACE) {
/* We use pair-wise sendrecv_replace in order to conserve memory usage,
* which is keeping with the spirit of the MPI-2.2 Standard. But
* because of this approach all processes must agree on the global
* schedule of sendrecv_replace operations to avoid deadlock.
*
* Note that this is not an especially efficient algorithm in terms of
* time and there will be multiple repeated malloc/free's rather than
* maintaining a single buffer across the whole loop. Something like
* MADRE is probably the best solution for the MPI_IN_PLACE scenario. */
for (i = 0; i < comm_size; ++i) {
/* start inner loop at i to avoid re-exchanging data */
for (j = i; j < comm_size; ++j) {
if (rank == i) {
/* also covers the (rank == i && rank == j) case */
mpi_errno = MPIC_Sendrecv_replace_ft(((char *)recvbuf + j*recvcount*recvtype_extent),
recvcount, recvtype,
j, MPIR_ALLTOALL_TAG,
j, MPIR_ALLTOALL_TAG,
comm, &status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
else if (rank == j) {
/* same as above with i/j args reversed */
mpi_errno = MPIC_Sendrecv_replace_ft(((char *)recvbuf + i*recvcount*recvtype_extent),
recvcount, recvtype,
i, MPIR_ALLTOALL_TAG,
i, MPIR_ALLTOALL_TAG,
comm, &status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
}
}
}
else if ((nbytes <= MPIR_PARAM_ALLTOALL_SHORT_MSG_SIZE) && (comm_size >= 8)) {
/* use the indexing algorithm by Jehoshua Bruck et al,
* IEEE TPDS, Nov. 97 */
/* allocate temporary buffer */
MPIR_Pack_size_impl(recvcount*comm_size, recvtype, &pack_size);
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, pack_size, mpi_errno, "tmp_buf");
/* Do Phase 1 of the algorithim. Shift the data blocks on process i
* upwards by a distance of i blocks. Store the result in recvbuf. */
mpi_errno = MPIR_Localcopy((char *) sendbuf +
rank*sendcount*sendtype_extent,
(comm_size - rank)*sendcount, sendtype, recvbuf,
(comm_size - rank)*recvcount, recvtype);
if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
mpi_errno = MPIR_Localcopy(sendbuf, rank*sendcount, sendtype,
(char *) recvbuf +
(comm_size-rank)*recvcount*recvtype_extent,
rank*recvcount, recvtype);
if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
/* Input data is now stored in recvbuf with datatype recvtype */
/* Now do Phase 2, the communication phase. It takes
ceiling(lg p) steps. In each step i, each process sends to rank+2^i
and receives from rank-2^i, and exchanges all data blocks
whose ith bit is 1. */
/* allocate displacements array for indexed datatype used in
communication */
MPIU_CHKLMEM_MALLOC(displs, int *, comm_size * sizeof(int), mpi_errno, "displs");
pof2 = 1;
while (pof2 < comm_size) {
dst = (rank + pof2) % comm_size;
src = (rank - pof2 + comm_size) % comm_size;
/* Exchange all data blocks whose ith bit is 1 */
/* Create an indexed datatype for the purpose */
count = 0;
for (block=1; block<comm_size; block++) {
if (block & pof2) {
displs[count] = block * recvcount;
count++;
}
}
mpi_errno = MPIR_Type_create_indexed_block_impl(count, recvcount,
displs, recvtype, &newtype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mpi_errno = MPIR_Type_commit_impl(&newtype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
position = 0;
mpi_errno = MPIR_Pack_impl(recvbuf, 1, newtype, tmp_buf, pack_size, &position);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mpi_errno = MPIC_Sendrecv_ft(tmp_buf, position, MPI_PACKED, dst,
MPIR_ALLTOALL_TAG, recvbuf, 1, newtype,
src, MPIR_ALLTOALL_TAG, comm,
MPI_STATUS_IGNORE, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
MPIR_Type_free_impl(&newtype);
pof2 *= 2;
}
/* Rotate blocks in recvbuf upwards by (rank + 1) blocks. Need
* a temporary buffer of the same size as recvbuf. */
/* get true extent of recvtype */
MPIR_Type_get_true_extent_impl(recvtype, &recvtype_true_lb, &recvtype_true_extent);
recvbuf_extent = recvcount * comm_size *
(MPIR_MAX(recvtype_true_extent, recvtype_extent));
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, recvbuf_extent, mpi_errno, "tmp_buf");
/* adjust for potential negative lower bound in datatype */
tmp_buf = (void *)((char*)tmp_buf - recvtype_true_lb);
mpi_errno = MPIR_Localcopy((char *) recvbuf + (rank+1)*recvcount*recvtype_extent,
(comm_size - rank - 1)*recvcount, recvtype, tmp_buf,
(comm_size - rank - 1)*recvcount, recvtype);
if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
mpi_errno = MPIR_Localcopy(recvbuf, (rank+1)*recvcount, recvtype,
(char *) tmp_buf + (comm_size-rank-1)*recvcount*recvtype_extent,
(rank+1)*recvcount, recvtype);
if (mpi_errno) { MPIU_ERR_POP(mpi_errno); }
/* Blocks are in the reverse order now (comm_size-1 to 0).
* Reorder them to (0 to comm_size-1) and store them in recvbuf. */
for (i=0; i<comm_size; i++){
mpi_errno = MPIR_Localcopy((char *) tmp_buf + i*recvcount*recvtype_extent,
recvcount, recvtype,
(char *) recvbuf + (comm_size-i-1)*recvcount*recvtype_extent,
recvcount, recvtype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
#ifdef MPIR_OLD_SHORT_ALLTOALL_ALG
/* Short message. Use recursive doubling. Each process sends all
its data at each step along with all data it received in
previous steps. */
/* need to allocate temporary buffer of size
sendbuf_extent*comm_size */
/* get true extent of sendtype */
MPIR_Type_get_true_extent_impl(sendtype, &sendtype_true_lb, &sendtype_true_extent);
sendbuf_extent = sendcount * comm_size *
(MPIR_MAX(sendtype_true_extent, sendtype_extent));
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, sendbuf_extent*comm_size, mpi_errno, "tmp_buf");
/* adjust for potential negative lower bound in datatype */
tmp_buf = (void *)((char*)tmp_buf - sendtype_true_lb);
/* copy local sendbuf into tmp_buf at location indexed by rank */
curr_cnt = sendcount*comm_size;
mpi_errno = MPIR_Localcopy(sendbuf, curr_cnt, sendtype,
((char *)tmp_buf + rank*sendbuf_extent),
curr_cnt, sendtype);
if (mpi_errno) { MPIU_ERR_POP(mpi_errno);}
mask = 0x1;
i = 0;
while (mask < comm_size) {
dst = rank ^ mask;
dst_tree_root = dst >> i;
dst_tree_root <<= i;
my_tree_root = rank >> i;
my_tree_root <<= i;
if (dst < comm_size) {
mpi_errno = MPIC_Sendrecv_ft(((char *)tmp_buf +
my_tree_root*sendbuf_extent),
curr_cnt, sendtype,
dst, MPIR_ALLTOALL_TAG,
((char *)tmp_buf +
dst_tree_root*sendbuf_extent),
sendbuf_extent*(comm_size-dst_tree_root),
sendtype, dst, MPIR_ALLTOALL_TAG,
comm, &status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
last_recv_cnt = 0;
} else
/* in case of non-power-of-two nodes, less data may be
received than specified */
MPIR_Get_count_impl(&status, sendtype, &last_recv_cnt);
curr_cnt += last_recv_cnt;
}
/* if some processes in this process's subtree in this step
did not have any destination process to communicate with
because of non-power-of-two, we need to send them the
result. We use a logarithmic recursive-halfing algorithm
for this. */
if (dst_tree_root + mask > comm_size) {
nprocs_completed = comm_size - my_tree_root - mask;
/* nprocs_completed is the number of processes in this
subtree that have all the data. Send data to others
in a tree fashion. First find root of current tree
that is being divided into two. k is the number of
least-significant bits in this process's rank that
must be zeroed out to find the rank of the root */
j = mask;
k = 0;
while (j) {
j >>= 1;
k++;
}
k--;
tmp_mask = mask >> 1;
while (tmp_mask) {
dst = rank ^ tmp_mask;
tree_root = rank >> k;
tree_root <<= k;
/* send only if this proc has data and destination
doesn't have data. at any step, multiple processes
can send if they have the data */
if ((dst > rank) &&
(rank < tree_root + nprocs_completed)
&& (dst >= tree_root + nprocs_completed)) {
/* send the data received in this step above */
mpi_errno = MPIC_Send_ft(((char *)tmp_buf +
dst_tree_root*sendbuf_extent),
last_recv_cnt, sendtype,
dst, MPIR_ALLTOALL_TAG,
comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
/* recv only if this proc. doesn't have data and sender
has data */
else if ((dst < rank) &&
(dst < tree_root + nprocs_completed) &&
(rank >= tree_root + nprocs_completed)) {
mpi_errno = MPIC_Recv_ft(((char *)tmp_buf +
dst_tree_root*sendbuf_extent),
sendbuf_extent*(comm_size-dst_tree_root),
sendtype,
dst, MPIR_ALLTOALL_TAG,
comm, &status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
last_recv_cnt = 0;
} else
MPIR_Get_count_impl(&status, sendtype, &last_recv_cnt);
curr_cnt += last_recv_cnt;
}
tmp_mask >>= 1;
k--;
}
}
mask <<= 1;
i++;
}
/*@
MPI_Type_hindexed - Creates an indexed datatype with offsets in bytes
Input Parameters:
+ count - number of blocks -- also number of entries in indices and blocklens
. blocklens - number of elements in each block (array of nonnegative integers)
. indices - byte displacement of each block (array of MPI_Aint)
- old_type - old datatype (handle)
Output Parameter:
. newtype - new datatype (handle)
.N Deprecated
This routine is replaced by 'MPI_Type_create_hindexed'.
.N ThreadSafe
.N Fortran
The indices are displacements, and are based on a zero origin. A common error
is to do something like to following
.vb
integer a(100)
integer blens(10), indices(10)
do i=1,10
blens(i) = 1
10 indices(i) = (1 + (i-1)*10) * sizeofint
call MPI_TYPE_HINDEXED(10,blens,indices,MPI_INTEGER,newtype,ierr)
call MPI_TYPE_COMMIT(newtype,ierr)
call MPI_SEND(a,1,newtype,...)
.ve
expecting this to send 'a(1),a(11),...' because the indices have values
'1,11,...'. Because these are `displacements` from the beginning of 'a',
it actually sends 'a(1+1),a(1+11),...'.
If you wish to consider the displacements as indices into a Fortran array,
consider declaring the Fortran array with a zero origin
.vb
integer a(0:99)
.ve
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_TYPE
.N MPI_ERR_COUNT
.N MPI_ERR_EXHAUSTED
.N MPI_ERR_ARG
@*/
int MPI_Type_hindexed(int count,
int blocklens[],
MPI_Aint indices[],
MPI_Datatype old_type,
MPI_Datatype *newtype)
{
static const char FCNAME[] = "MPI_Type_hindexed";
int mpi_errno = MPI_SUCCESS;
MPI_Datatype new_handle;
MPID_Datatype *new_dtp;
int i, *ints;
MPIU_CHKLMEM_DECL(1);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_TYPE_HINDEXED);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIU_THREAD_CS_ENTER(ALLFUNC,);
MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_TYPE_HINDEXED);
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
int j;
MPID_Datatype *datatype_ptr = NULL;
MPIR_ERRTEST_COUNT(count, mpi_errno);
MPIR_ERRTEST_DATATYPE(old_type, "datatype", mpi_errno);
if (count > 0) {
MPIR_ERRTEST_ARGNULL(blocklens, "blocklens", mpi_errno);
MPIR_ERRTEST_ARGNULL(indices, "indices", mpi_errno);
}
if (mpi_errno == MPI_SUCCESS) {
if (HANDLE_GET_KIND(old_type) != HANDLE_KIND_BUILTIN) {
MPID_Datatype_get_ptr( old_type, datatype_ptr );
MPID_Datatype_valid_ptr(datatype_ptr, mpi_errno);
}
/* verify that all blocklengths are >= 0 */
for (j=0; j < count; j++) {
MPIR_ERRTEST_ARGNEG(blocklens[j], "blocklen", mpi_errno);
}
}
MPIR_ERRTEST_ARGNULL(newtype, "newtype", mpi_errno);
if (mpi_errno != MPI_SUCCESS) goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPID_Type_indexed(count,
blocklens,
indices,
1, /* displacements in bytes */
old_type,
&new_handle);
if (mpi_errno != MPI_SUCCESS) goto fn_fail;
MPIU_CHKLMEM_MALLOC(ints, int *, (count + 1) * sizeof(int), mpi_errno, "contents integer array");
/* copy ints into temporary buffer (count and blocklengths) */
ints[0] = count;
for (i=0; i < count; i++)
{
ints[i+1] = blocklens[i];
}
MPID_Datatype_get_ptr(new_handle, new_dtp);
mpi_errno = MPID_Datatype_set_contents(new_dtp,
MPI_COMBINER_HINDEXED,
count+1, /* ints */
count, /* aints (displs) */
1, /* types */
ints,
indices,
&old_type);
if (mpi_errno != MPI_SUCCESS) goto fn_fail;
MPIU_OBJ_PUBLISH_HANDLE(*newtype, new_handle);
/* ... end of body of routine ... */
fn_exit:
MPIU_CHKLMEM_FREEALL();
MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_TYPE_HINDEXED);
MPIU_THREAD_CS_EXIT(ALLFUNC,);
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_type_hindexed",
"**mpi_type_hindexed %d %p %p %D %p", count, blocklens, indices, old_type, newtype);
}
# endif
mpi_errno = MPIR_Err_return_comm( NULL, FCNAME, mpi_errno );
goto fn_exit;
/* --END ERROR HANDLING-- */
}
/*@
MPI_Comm_join - Create a communicator by joining two processes connected by
a socket.
Input Parameter:
. fd - socket file descriptor
Output Parameter:
. intercomm - new intercommunicator (handle)
Notes:
The socket must be quiescent before 'MPI_COMM_JOIN' is called and after
'MPI_COMM_JOIN' returns. More specifically, on entry to 'MPI_COMM_JOIN', a
read on the socket will not read any data that was written to the socket
before the remote process called 'MPI_COMM_JOIN'.
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
@*/
int MPI_Comm_join(int fd, MPI_Comm *intercomm)
{
static const char FCNAME[] = "MPI_Comm_join";
int mpi_errno = MPI_SUCCESS, err;
MPID_Comm *intercomm_ptr;
char *local_port, *remote_port;
MPIU_CHKLMEM_DECL(2);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_COMM_JOIN);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIU_THREAD_CS_ENTER(ALLFUNC,);
MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_COMM_JOIN);
/* ... body of routine ... */
MPIU_CHKLMEM_MALLOC(local_port, char *, MPI_MAX_PORT_NAME, mpi_errno, "local port name");
MPIU_CHKLMEM_MALLOC(remote_port, char *, MPI_MAX_PORT_NAME, mpi_errno, "remote port name");
mpi_errno = MPIR_Open_port_impl(NULL, local_port);
MPIU_ERR_CHKANDJUMP((mpi_errno != MPI_SUCCESS), mpi_errno, MPI_ERR_OTHER, "**openportfailed");
err = MPIR_fd_send(fd, local_port, MPI_MAX_PORT_NAME);
MPIU_ERR_CHKANDJUMP1((err != 0), mpi_errno, MPI_ERR_INTERN, "**join_send", "**join_send %d", err);
err = MPIR_fd_recv(fd, remote_port, MPI_MAX_PORT_NAME);
MPIU_ERR_CHKANDJUMP1((err != 0), mpi_errno, MPI_ERR_INTERN, "**join_recv", "**join_recv %d", err);
MPIU_ERR_CHKANDJUMP2((strcmp(local_port, remote_port) == 0), mpi_errno, MPI_ERR_INTERN, "**join_portname",
"**join_portname %s %s", local_port, remote_port);
if (strcmp(local_port, remote_port) < 0) {
MPID_Comm *comm_self_ptr;
MPID_Comm_get_ptr( MPI_COMM_SELF, comm_self_ptr );
mpi_errno = MPIR_Comm_accept_impl(local_port, NULL, 0, comm_self_ptr, &intercomm_ptr);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
} else {
MPID_Comm *comm_self_ptr;
MPID_Comm_get_ptr( MPI_COMM_SELF, comm_self_ptr );
mpi_errno = MPIR_Comm_connect_impl(remote_port, NULL, 0, comm_self_ptr, &intercomm_ptr);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
mpi_errno = MPIR_Close_port_impl(local_port);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_OBJ_PUBLISH_HANDLE(*intercomm, intercomm_ptr->handle);
/* ... end of body of routine ... */
fn_exit:
MPIU_CHKLMEM_FREEALL();
MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_COMM_JOIN);
MPIU_THREAD_CS_EXIT(ALLFUNC,);
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_comm_join",
"**mpi_comm_join %d %p", fd, intercomm);
}
# endif
mpi_errno = MPIR_Err_return_comm( NULL, FCNAME, mpi_errno );
goto fn_exit;
/* --END ERROR HANDLING-- */
}
int MPIR_Alltoallv_intra(const void *sendbuf, const int *sendcounts, const int *sdispls,
MPI_Datatype sendtype, void *recvbuf, const int *recvcounts,
const int *rdispls, MPI_Datatype recvtype, MPID_Comm *comm_ptr,
MPIR_Errflag_t *errflag)
{
int comm_size, i, j;
MPI_Aint send_extent, recv_extent;
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
MPI_Status *starray;
MPI_Status status;
MPID_Request **reqarray;
int dst, rank, req_cnt;
int ii, ss, bblock;
int type_size;
MPIU_CHKLMEM_DECL(2);
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
/* Get extent of recv type, but send type is only valid if (sendbuf!=MPI_IN_PLACE) */
MPID_Datatype_get_extent_macro(recvtype, recv_extent);
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_ENTER( comm_ptr );
if (sendbuf == MPI_IN_PLACE) {
/* We use pair-wise sendrecv_replace in order to conserve memory usage,
* which is keeping with the spirit of the MPI-2.2 Standard. But
* because of this approach all processes must agree on the global
* schedule of sendrecv_replace operations to avoid deadlock.
*
* Note that this is not an especially efficient algorithm in terms of
* time and there will be multiple repeated malloc/free's rather than
* maintaining a single buffer across the whole loop. Something like
* MADRE is probably the best solution for the MPI_IN_PLACE scenario. */
for (i = 0; i < comm_size; ++i) {
/* start inner loop at i to avoid re-exchanging data */
for (j = i; j < comm_size; ++j) {
if (rank == i) {
/* also covers the (rank == i && rank == j) case */
mpi_errno = MPIC_Sendrecv_replace(((char *)recvbuf + rdispls[j]*recv_extent),
recvcounts[j], recvtype,
j, MPIR_ALLTOALLV_TAG,
j, MPIR_ALLTOALLV_TAG,
comm_ptr, &status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = MPIR_ERR_GET_CLASS(mpi_errno);
MPIR_ERR_SET(mpi_errno, *errflag, "**fail");
MPIR_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
else if (rank == j) {
/* same as above with i/j args reversed */
mpi_errno = MPIC_Sendrecv_replace(((char *)recvbuf + rdispls[i]*recv_extent),
recvcounts[i], recvtype,
i, MPIR_ALLTOALLV_TAG,
i, MPIR_ALLTOALLV_TAG,
comm_ptr, &status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = MPIR_ERR_GET_CLASS(mpi_errno);
MPIR_ERR_SET(mpi_errno, *errflag, "**fail");
MPIR_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
}
}
}
else {
bblock = MPIR_CVAR_ALLTOALL_THROTTLE;
if (bblock == 0) bblock = comm_size;
MPID_Datatype_get_extent_macro(sendtype, send_extent);
MPIU_CHKLMEM_MALLOC(starray, MPI_Status*, 2*bblock*sizeof(MPI_Status), mpi_errno, "starray");
MPIU_CHKLMEM_MALLOC(reqarray, MPID_Request**, 2*bblock*sizeof(MPID_Request *), mpi_errno, "reqarray");
/* post only bblock isends/irecvs at a time as suggested by Tony Ladd */
for (ii=0; ii<comm_size; ii+=bblock) {
req_cnt = 0;
ss = comm_size-ii < bblock ? comm_size-ii : bblock;
/* do the communication -- post ss sends and receives: */
for ( i=0; i<ss; i++ ) {
dst = (rank+i+ii) % comm_size;
if (recvcounts[dst]) {
MPID_Datatype_get_size_macro(recvtype, type_size);
if (type_size) {
MPIU_Ensure_Aint_fits_in_pointer(MPIU_VOID_PTR_CAST_TO_MPI_AINT recvbuf +
rdispls[dst]*recv_extent);
mpi_errno = MPIC_Irecv((char *)recvbuf+rdispls[dst]*recv_extent,
recvcounts[dst], recvtype, dst,
MPIR_ALLTOALLV_TAG, comm_ptr,
&reqarray[req_cnt]);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = MPIR_ERR_GET_CLASS(mpi_errno);
MPIR_ERR_SET(mpi_errno, *errflag, "**fail");
MPIR_ERR_ADD(mpi_errno_ret, mpi_errno);
}
req_cnt++;
}
}
}
for ( i=0; i<ss; i++ ) {
dst = (rank-i-ii+comm_size) % comm_size;
if (sendcounts[dst]) {
MPID_Datatype_get_size_macro(sendtype, type_size);
if (type_size) {
MPIU_Ensure_Aint_fits_in_pointer(MPIU_VOID_PTR_CAST_TO_MPI_AINT sendbuf +
sdispls[dst]*send_extent);
mpi_errno = MPIC_Isend((char *)sendbuf+sdispls[dst]*send_extent,
sendcounts[dst], sendtype, dst,
MPIR_ALLTOALLV_TAG, comm_ptr,
&reqarray[req_cnt], errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = MPIR_ERR_GET_CLASS(mpi_errno);
MPIR_ERR_SET(mpi_errno, *errflag, "**fail");
MPIR_ERR_ADD(mpi_errno_ret, mpi_errno);
}
req_cnt++;
}
}
}
mpi_errno = MPIC_Waitall(req_cnt, reqarray, starray, errflag);
if (mpi_errno && mpi_errno != MPI_ERR_IN_STATUS) MPIR_ERR_POP(mpi_errno);
/* --BEGIN ERROR HANDLING-- */
if (mpi_errno == MPI_ERR_IN_STATUS) {
for (i=0; i<req_cnt; i++) {
if (starray[i].MPI_ERROR != MPI_SUCCESS) {
mpi_errno = starray[i].MPI_ERROR;
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = MPIR_ERR_GET_CLASS(mpi_errno);
MPIR_ERR_SET(mpi_errno, *errflag, "**fail");
MPIR_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
}
}
/* --END ERROR HANDLING-- */
}
}
fn_exit:
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_EXIT( comm_ptr );
MPIU_CHKLMEM_FREEALL();
if (mpi_errno_ret)
mpi_errno = mpi_errno_ret;
else if (*errflag != MPIR_ERR_NONE)
MPIR_ERR_SET(mpi_errno, *errflag, "**coll_fail");
return mpi_errno;
fn_fail:
goto fn_exit;
}
int MPIR_Iallreduce_redscat_allgather(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPID_Comm *comm_ptr, MPID_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
int comm_size, rank, newrank, pof2, rem;
int i, send_idx, recv_idx, last_idx, mask, newdst, dst, send_cnt, recv_cnt;
MPI_Aint true_lb, true_extent, extent;
void *tmp_buf = NULL;
int *cnts, *disps;
MPIR_SCHED_CHKPMEM_DECL(1);
MPIU_CHKLMEM_DECL(2);
/* we only support builtin datatypes for now, breaking up user types to do
* the reduce-scatter is tricky */
MPIU_Assert(HANDLE_GET_KIND(op) == HANDLE_KIND_BUILTIN);
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
/* need to allocate temporary buffer to store incoming data*/
MPIR_Type_get_true_extent_impl(datatype, &true_lb, &true_extent);
MPID_Datatype_get_extent_macro(datatype, extent);
MPID_Ensure_Aint_fits_in_pointer(count * MPIR_MAX(extent, true_extent));
MPIR_SCHED_CHKPMEM_MALLOC(tmp_buf, void *, count*(MPIR_MAX(extent,true_extent)), mpi_errno, "temporary buffer");
/* adjust for potential negative lower bound in datatype */
tmp_buf = (void *)((char*)tmp_buf - true_lb);
/* copy local data into recvbuf */
if (sendbuf != MPI_IN_PLACE) {
mpi_errno = MPID_Sched_copy(sendbuf, count, datatype,
recvbuf, count, datatype, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
}
/* find nearest power-of-two less than or equal to comm_size */
pof2 = 1;
while (pof2 <= comm_size) pof2 <<= 1;
pof2 >>=1;
rem = comm_size - pof2;
/* In the non-power-of-two case, all even-numbered
processes of rank < 2*rem send their data to
(rank+1). These even-numbered processes no longer
participate in the algorithm until the very end. The
remaining processes form a nice power-of-two. */
if (rank < 2*rem) {
if (rank % 2 == 0) { /* even */
mpi_errno = MPID_Sched_send(recvbuf, count, datatype, rank+1, comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
/* temporarily set the rank to -1 so that this
process does not pariticipate in recursive
doubling */
newrank = -1;
}
else { /* odd */
mpi_errno = MPID_Sched_recv(tmp_buf, count, datatype, rank-1, comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
/* do the reduction on received data. since the
ordering is right, it doesn't matter whether
the operation is commutative or not. */
mpi_errno = MPID_Sched_reduce(tmp_buf, recvbuf, count, datatype, op, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
/* change the rank */
newrank = rank / 2;
}
}
else /* rank >= 2*rem */
newrank = rank - rem;
if (newrank != -1) {
/* for the reduce-scatter, calculate the count that
each process receives and the displacement within
the buffer */
/* TODO I (goodell@) believe that these counts and displacements could be
* calculated directly during the loop, rather than requiring a less-scalable
* "2*pof2"-sized memory allocation */
MPIU_CHKLMEM_MALLOC(cnts, int *, pof2*sizeof(int), mpi_errno, "counts");
MPIU_CHKLMEM_MALLOC(disps, int *, pof2*sizeof(int), mpi_errno, "displacements");
MPIU_Assert(count >= pof2); /* the cnts calculations assume this */
for (i=0; i<(pof2-1); i++)
cnts[i] = count/pof2;
cnts[pof2-1] = count - (count/pof2)*(pof2-1);
disps[0] = 0;
for (i=1; i<pof2; i++)
disps[i] = disps[i-1] + cnts[i-1];
mask = 0x1;
send_idx = recv_idx = 0;
last_idx = pof2;
while (mask < pof2) {
newdst = newrank ^ mask;
/* find real rank of dest */
dst = (newdst < rem) ? newdst*2 + 1 : newdst + rem;
send_cnt = recv_cnt = 0;
if (newrank < newdst) {
send_idx = recv_idx + pof2/(mask*2);
for (i=send_idx; i<last_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<send_idx; i++)
recv_cnt += cnts[i];
}
else {
recv_idx = send_idx + pof2/(mask*2);
for (i=send_idx; i<recv_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<last_idx; i++)
recv_cnt += cnts[i];
}
/* Send data from recvbuf. Recv into tmp_buf */
mpi_errno = MPID_Sched_recv(((char *)tmp_buf + disps[recv_idx]*extent),
recv_cnt, datatype, dst, comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* sendrecv, no barrier here */
mpi_errno = MPID_Sched_send(((char *)recvbuf + disps[send_idx]*extent),
send_cnt, datatype, dst, comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
/* tmp_buf contains data received in this step.
recvbuf contains data accumulated so far */
/* This algorithm is used only for predefined ops
and predefined ops are always commutative. */
mpi_errno = MPID_Sched_reduce(((char *)tmp_buf + disps[recv_idx]*extent),
((char *)recvbuf + disps[recv_idx]*extent),
recv_cnt, datatype, op, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
/* update send_idx for next iteration */
send_idx = recv_idx;
mask <<= 1;
/* update last_idx, but not in last iteration
because the value is needed in the allgather
step below. */
if (mask < pof2)
last_idx = recv_idx + pof2/mask;
}
/* now do the allgather */
mask >>= 1;
while (mask > 0) {
newdst = newrank ^ mask;
/* find real rank of dest */
dst = (newdst < rem) ? newdst*2 + 1 : newdst + rem;
send_cnt = recv_cnt = 0;
if (newrank < newdst) {
/* update last_idx except on first iteration */
if (mask != pof2/2)
last_idx = last_idx + pof2/(mask*2);
recv_idx = send_idx + pof2/(mask*2);
for (i=send_idx; i<recv_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<last_idx; i++)
recv_cnt += cnts[i];
}
else {
recv_idx = send_idx - pof2/(mask*2);
for (i=send_idx; i<last_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<send_idx; i++)
recv_cnt += cnts[i];
}
mpi_errno = MPID_Sched_recv(((char *)recvbuf + disps[recv_idx]*extent),
recv_cnt, datatype, dst, comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* sendrecv, no barrier here */
mpi_errno = MPID_Sched_send(((char *)recvbuf + disps[send_idx]*extent),
send_cnt, datatype, dst, comm_ptr, s);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPID_SCHED_BARRIER(s);
if (newrank > newdst) send_idx = recv_idx;
mask >>= 1;
}
}
static int MPIR_Bcast_binomial_MV2(
void *buffer,
int count,
MPI_Datatype datatype,
int root,
MPID_Comm *comm_ptr,
int *errflag)
{
int rank, comm_size, src, dst;
int relative_rank, mask;
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
int nbytes=0;
int type_size, is_contig, is_homogeneous;
int position;
void *tmp_buf=NULL;
MPI_Comm comm;
MPID_Datatype *dtp;
MPIU_CHKLMEM_DECL(1);
comm = comm_ptr->handle;
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
/* If there is only one process, return */
if (comm_size == 1) goto fn_exit;
if (HANDLE_GET_KIND(datatype) == HANDLE_KIND_BUILTIN)
is_contig = 1;
else {
MPID_Datatype_get_ptr(datatype, dtp);
is_contig = dtp->is_contig;
}
is_homogeneous = 1;
#ifdef MPID_HAS_HETERO
if (comm_ptr->is_hetero)
is_homogeneous = 0;
#endif
/* MPI_Type_size() might not give the accurate size of the packed
* datatype for heterogeneous systems (because of padding, encoding,
* etc). On the other hand, MPI_Pack_size() can become very
* expensive, depending on the implementation, especially for
* heterogeneous systems. We want to use MPI_Type_size() wherever
* possible, and MPI_Pack_size() in other places.
*/
if (is_homogeneous)
MPID_Datatype_get_size_macro(datatype, type_size);
else
MPIR_Pack_size_impl(1, datatype, &type_size);
nbytes = type_size * count;
if (!is_contig || !is_homogeneous)
{
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, nbytes, mpi_errno, "tmp_buf");
/* TODO: Pipeline the packing and communication */
position = 0;
if (rank == root) {
mpi_errno = MPIR_Pack_impl(buffer, count, datatype, tmp_buf, nbytes,
&position);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
}
int MPIDI_Comm_connect(const char *port_name, MPID_Info *info, int root,
MPID_Comm *comm_ptr, MPID_Comm **newcomm)
{
int mpi_errno=MPI_SUCCESS;
int j, i, rank, recv_ints[3], send_ints[3], context_id;
int remote_comm_size=0;
MPID_Comm *tmp_comm = NULL;
MPIDI_VC_t *new_vc = NULL;
int sendtag=100, recvtag=100, n_remote_pgs;
int n_local_pgs=1, local_comm_size;
pg_translation *local_translation = NULL, *remote_translation = NULL;
pg_node *pg_list = NULL;
MPIDI_PG_t **remote_pg = NULL;
MPIR_Context_id_t recvcontext_id = MPIR_INVALID_CONTEXT_ID;
int errflag = FALSE;
MPIU_CHKLMEM_DECL(3);
MPIDI_STATE_DECL(MPID_STATE_MPIDI_COMM_CONNECT);
MPIDI_FUNC_ENTER(MPID_STATE_MPIDI_COMM_CONNECT);
/* Get the context ID here because we need to send it to the remote side */
mpi_errno = MPIR_Get_contextid( comm_ptr, &recvcontext_id );
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
rank = comm_ptr->rank;
local_comm_size = comm_ptr->local_size;
if (rank == root)
{
/* Establish a communicator to communicate with the root on the
other side. */
mpi_errno = MPIDI_Create_inter_root_communicator_connect(
port_name, &tmp_comm, &new_vc);
if (mpi_errno != MPI_SUCCESS) {
MPIU_ERR_POP_LABEL(mpi_errno, no_port);
}
/* Make an array to translate local ranks to process group index
and rank */
MPIU_CHKLMEM_MALLOC(local_translation,pg_translation*,
local_comm_size*sizeof(pg_translation),
mpi_errno,"local_translation");
/* Make a list of the local communicator's process groups and encode
them in strings to be sent to the other side.
The encoded string for each process group contains the process
group id, size and all its KVS values */
mpi_errno = ExtractLocalPGInfo( comm_ptr, local_translation,
&pg_list, &n_local_pgs );
MPIU_ERR_CHKINTERNAL(mpi_errno, mpi_errno, "Can't extract local PG info.");
/* Send the remote root: n_local_pgs, local_comm_size,
Recv from the remote root: n_remote_pgs, remote_comm_size,
recvcontext_id for newcomm */
send_ints[0] = n_local_pgs;
send_ints[1] = local_comm_size;
send_ints[2] = recvcontext_id;
MPIU_DBG_MSG_FMT(CH3_CONNECT,VERBOSE,(MPIU_DBG_FDEST,
"sending 3 ints, %d, %d and %d, and receiving 3 ints",
send_ints[0], send_ints[1], send_ints[2]));
mpi_errno = MPIC_Sendrecv(send_ints, 3, MPI_INT, 0,
sendtag++, recv_ints, 3, MPI_INT,
0, recvtag++, tmp_comm->handle,
MPI_STATUS_IGNORE);
if (mpi_errno != MPI_SUCCESS) {
/* this is a no_port error because we may fail to connect
on the send if the port name is invalid */
MPIU_ERR_POP_LABEL(mpi_errno, no_port);
}
}
int MPIR_Allreduce_intra (
void *sendbuf,
void *recvbuf,
int count,
MPI_Datatype datatype,
MPI_Op op,
MPID_Comm *comm_ptr,
int *errflag )
{
int is_homogeneous;
#ifdef MPID_HAS_HETERO
int rc;
#endif
int comm_size, rank, type_size;
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
int mask, dst, is_commutative, pof2, newrank, rem, newdst, i,
send_idx, recv_idx, last_idx, send_cnt, recv_cnt, *cnts, *disps;
MPI_Aint true_extent, true_lb, extent;
void *tmp_buf;
MPI_Comm comm;
MPIU_CHKLMEM_DECL(3);
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_ENTER( comm_ptr );
if (count == 0) goto fn_exit;
comm = comm_ptr->handle;
is_commutative = MPIR_Op_is_commutative(op);
#if defined(USE_SMP_COLLECTIVES)
/* is the op commutative? We do SMP optimizations only if it is. */
if (MPIR_Comm_is_node_aware(comm_ptr) && is_commutative) {
/* on each node, do a reduce to the local root */
if (comm_ptr->node_comm != NULL) {
/* take care of the MPI_IN_PLACE case. For reduce,
MPI_IN_PLACE is specified only on the root;
for allreduce it is specified on all processes. */
if ((sendbuf == MPI_IN_PLACE) && (comm_ptr->node_comm->rank != 0)) {
/* IN_PLACE and not root of reduce. Data supplied to this
allreduce is in recvbuf. Pass that as the sendbuf to reduce. */
mpi_errno = MPIR_Reduce_impl(recvbuf, NULL, count, datatype, op, 0, comm_ptr->node_comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
} else {
mpi_errno = MPIR_Reduce_impl(sendbuf, recvbuf, count, datatype, op, 0, comm_ptr->node_comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
} else {
/* only one process on the node. copy sendbuf to recvbuf */
if (sendbuf != MPI_IN_PLACE) {
mpi_errno = MPIR_Localcopy(sendbuf, count, datatype, recvbuf, count, datatype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
}
/* now do an IN_PLACE allreduce among the local roots of all nodes */
if (comm_ptr->node_roots_comm != NULL) {
mpi_errno = allreduce_intra_or_coll_fn(MPI_IN_PLACE, recvbuf, count, datatype, op, comm_ptr->node_roots_comm,
errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
/* now broadcast the result among local processes */
if (comm_ptr->node_comm != NULL) {
mpi_errno = MPIR_Bcast_impl(recvbuf, count, datatype, 0, comm_ptr->node_comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
goto fn_exit;
}
#endif
is_homogeneous = 1;
#ifdef MPID_HAS_HETERO
if (comm_ptr->is_hetero)
is_homogeneous = 0;
#endif
#ifdef MPID_HAS_HETERO
if (!is_homogeneous) {
/* heterogeneous. To get the same result on all processes, we
do a reduce to 0 and then broadcast. */
mpi_errno = MPIR_Reduce_impl ( sendbuf, recvbuf, count, datatype,
op, 0, comm_ptr, errflag );
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
mpi_errno = MPIR_Bcast_impl( recvbuf, count, datatype, 0, comm_ptr, errflag );
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
else
#endif /* MPID_HAS_HETERO */
{
/* homogeneous */
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
is_commutative = MPIR_Op_is_commutative(op);
/* need to allocate temporary buffer to store incoming data*/
MPIR_Type_get_true_extent_impl(datatype, &true_lb, &true_extent);
MPID_Datatype_get_extent_macro(datatype, extent);
MPID_Ensure_Aint_fits_in_pointer(count * MPIR_MAX(extent, true_extent));
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, count*(MPIR_MAX(extent,true_extent)), mpi_errno, "temporary buffer");
/* adjust for potential negative lower bound in datatype */
tmp_buf = (void *)((char*)tmp_buf - true_lb);
/* copy local data into recvbuf */
if (sendbuf != MPI_IN_PLACE) {
mpi_errno = MPIR_Localcopy(sendbuf, count, datatype, recvbuf,
count, datatype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
MPID_Datatype_get_size_macro(datatype, type_size);
/* find nearest power-of-two less than or equal to comm_size */
pof2 = 1;
while (pof2 <= comm_size) pof2 <<= 1;
pof2 >>=1;
rem = comm_size - pof2;
/* In the non-power-of-two case, all even-numbered
processes of rank < 2*rem send their data to
(rank+1). These even-numbered processes no longer
participate in the algorithm until the very end. The
remaining processes form a nice power-of-two. */
if (rank < 2*rem) {
if (rank % 2 == 0) { /* even */
mpi_errno = MPIC_Send_ft(recvbuf, count,
datatype, rank+1,
MPIR_ALLREDUCE_TAG, comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
/* temporarily set the rank to -1 so that this
process does not pariticipate in recursive
doubling */
newrank = -1;
}
else { /* odd */
mpi_errno = MPIC_Recv_ft(tmp_buf, count,
datatype, rank-1,
MPIR_ALLREDUCE_TAG, comm,
MPI_STATUS_IGNORE, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
/* do the reduction on received data. since the
ordering is right, it doesn't matter whether
the operation is commutative or not. */
mpi_errno = MPIR_Reduce_local_impl(tmp_buf, recvbuf, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* change the rank */
newrank = rank / 2;
}
}
else /* rank >= 2*rem */
newrank = rank - rem;
/* If op is user-defined or count is less than pof2, use
recursive doubling algorithm. Otherwise do a reduce-scatter
followed by allgather. (If op is user-defined,
derived datatypes are allowed and the user could pass basic
datatypes on one process and derived on another as long as
the type maps are the same. Breaking up derived
datatypes to do the reduce-scatter is tricky, therefore
using recursive doubling in that case.) */
if (newrank != -1) {
if ((count*type_size <= MPIR_PARAM_ALLREDUCE_SHORT_MSG_SIZE) ||
(HANDLE_GET_KIND(op) != HANDLE_KIND_BUILTIN) ||
(count < pof2)) { /* use recursive doubling */
mask = 0x1;
while (mask < pof2) {
newdst = newrank ^ mask;
/* find real rank of dest */
dst = (newdst < rem) ? newdst*2 + 1 : newdst + rem;
/* Send the most current data, which is in recvbuf. Recv
into tmp_buf */
mpi_errno = MPIC_Sendrecv_ft(recvbuf, count, datatype,
dst, MPIR_ALLREDUCE_TAG, tmp_buf,
count, datatype, dst,
MPIR_ALLREDUCE_TAG, comm,
MPI_STATUS_IGNORE, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
/* tmp_buf contains data received in this step.
recvbuf contains data accumulated so far */
if (is_commutative || (dst < rank)) {
/* op is commutative OR the order is already right */
mpi_errno = MPIR_Reduce_local_impl(tmp_buf, recvbuf, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
else {
/* op is noncommutative and the order is not right */
mpi_errno = MPIR_Reduce_local_impl(recvbuf, tmp_buf, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* copy result back into recvbuf */
mpi_errno = MPIR_Localcopy(tmp_buf, count, datatype,
recvbuf, count, datatype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
mask <<= 1;
}
}
else {
/* do a reduce-scatter followed by allgather */
/* for the reduce-scatter, calculate the count that
each process receives and the displacement within
the buffer */
MPIU_CHKLMEM_MALLOC(cnts, int *, pof2*sizeof(int), mpi_errno, "counts");
MPIU_CHKLMEM_MALLOC(disps, int *, pof2*sizeof(int), mpi_errno, "displacements");
for (i=0; i<(pof2-1); i++)
cnts[i] = count/pof2;
cnts[pof2-1] = count - (count/pof2)*(pof2-1);
disps[0] = 0;
for (i=1; i<pof2; i++)
disps[i] = disps[i-1] + cnts[i-1];
mask = 0x1;
send_idx = recv_idx = 0;
last_idx = pof2;
while (mask < pof2) {
newdst = newrank ^ mask;
/* find real rank of dest */
dst = (newdst < rem) ? newdst*2 + 1 : newdst + rem;
send_cnt = recv_cnt = 0;
if (newrank < newdst) {
send_idx = recv_idx + pof2/(mask*2);
for (i=send_idx; i<last_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<send_idx; i++)
recv_cnt += cnts[i];
}
else {
recv_idx = send_idx + pof2/(mask*2);
for (i=send_idx; i<recv_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<last_idx; i++)
recv_cnt += cnts[i];
}
/* printf("Rank %d, send_idx %d, recv_idx %d, send_cnt %d, recv_cnt %d, last_idx %d\n", newrank, send_idx, recv_idx,
send_cnt, recv_cnt, last_idx);
*/
/* Send data from recvbuf. Recv into tmp_buf */
mpi_errno = MPIC_Sendrecv_ft((char *) recvbuf +
disps[send_idx]*extent,
send_cnt, datatype,
dst, MPIR_ALLREDUCE_TAG,
(char *) tmp_buf +
disps[recv_idx]*extent,
recv_cnt, datatype, dst,
MPIR_ALLREDUCE_TAG, comm,
MPI_STATUS_IGNORE, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
/* tmp_buf contains data received in this step.
recvbuf contains data accumulated so far */
/* This algorithm is used only for predefined ops
and predefined ops are always commutative. */
mpi_errno = MPIR_Reduce_local_impl(((char *) tmp_buf + disps[recv_idx]*extent),
((char *) recvbuf + disps[recv_idx]*extent),
recv_cnt, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* update send_idx for next iteration */
send_idx = recv_idx;
mask <<= 1;
/* update last_idx, but not in last iteration
because the value is needed in the allgather
step below. */
if (mask < pof2)
last_idx = recv_idx + pof2/mask;
}
/* now do the allgather */
mask >>= 1;
while (mask > 0) {
newdst = newrank ^ mask;
/* find real rank of dest */
dst = (newdst < rem) ? newdst*2 + 1 : newdst + rem;
send_cnt = recv_cnt = 0;
if (newrank < newdst) {
/* update last_idx except on first iteration */
if (mask != pof2/2)
last_idx = last_idx + pof2/(mask*2);
recv_idx = send_idx + pof2/(mask*2);
for (i=send_idx; i<recv_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<last_idx; i++)
recv_cnt += cnts[i];
}
else {
recv_idx = send_idx - pof2/(mask*2);
for (i=send_idx; i<last_idx; i++)
send_cnt += cnts[i];
for (i=recv_idx; i<send_idx; i++)
recv_cnt += cnts[i];
}
mpi_errno = MPIC_Sendrecv_ft((char *) recvbuf +
disps[send_idx]*extent,
send_cnt, datatype,
dst, MPIR_ALLREDUCE_TAG,
(char *) recvbuf +
disps[recv_idx]*extent,
recv_cnt, datatype, dst,
MPIR_ALLREDUCE_TAG, comm,
MPI_STATUS_IGNORE, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
if (newrank > newdst) send_idx = recv_idx;
mask >>= 1;
}
}
}
/* In the non-power-of-two case, all odd-numbered
processes of rank < 2*rem send the result to
(rank-1), the ranks who didn't participate above. */
if (rank < 2*rem) {
if (rank % 2) /* odd */
mpi_errno = MPIC_Send_ft(recvbuf, count,
datatype, rank-1,
MPIR_ALLREDUCE_TAG, comm, errflag);
else /* even */
mpi_errno = MPIC_Recv_ft(recvbuf, count,
datatype, rank+1,
MPIR_ALLREDUCE_TAG, comm,
MPI_STATUS_IGNORE, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
}
fn_exit:
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_EXIT( comm_ptr );
MPIU_CHKLMEM_FREEALL();
if (mpi_errno_ret)
mpi_errno = mpi_errno_ret;
return (mpi_errno);
fn_fail:
goto fn_exit;
}
static int MPIR_Scan_generic (
const void *sendbuf,
void *recvbuf,
int count,
MPI_Datatype datatype,
MPI_Op op,
MPID_Comm *comm_ptr,
int *errflag )
{
MPI_Status status;
int rank, comm_size;
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
int mask, dst, is_commutative;
MPI_Aint true_extent, true_lb, extent;
void *partial_scan, *tmp_buf;
MPID_Op *op_ptr;
MPI_Comm comm;
MPIU_THREADPRIV_DECL;
MPIU_CHKLMEM_DECL(2);
if (count == 0) return MPI_SUCCESS;
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_ENTER( comm_ptr );
comm = comm_ptr->handle;
comm_size = comm_ptr->local_size;
rank = comm_ptr->rank;
MPIU_THREADPRIV_GET;
/* set op_errno to 0. stored in perthread structure */
MPIU_THREADPRIV_FIELD(op_errno) = 0;
if (HANDLE_GET_KIND(op) == HANDLE_KIND_BUILTIN) {
is_commutative = 1;
}
else {
MPID_Op_get_ptr(op, op_ptr);
if (op_ptr->kind == MPID_OP_USER_NONCOMMUTE)
is_commutative = 0;
else
is_commutative = 1;
}
/* need to allocate temporary buffer to store partial scan*/
MPIR_Type_get_true_extent_impl(datatype, &true_lb, &true_extent);
MPID_Datatype_get_extent_macro(datatype, extent);
MPIU_CHKLMEM_MALLOC(partial_scan, void *, count*(MPIR_MAX(extent,true_extent)), mpi_errno, "partial_scan");
/* This eventually gets malloc()ed as a temp buffer, not added to
* any user buffers */
MPID_Ensure_Aint_fits_in_pointer(count * MPIR_MAX(extent, true_extent));
/* adjust for potential negative lower bound in datatype */
partial_scan = (void *)((char*)partial_scan - true_lb);
/* need to allocate temporary buffer to store incoming data*/
MPIU_CHKLMEM_MALLOC(tmp_buf, void *, count*(MPIR_MAX(extent,true_extent)), mpi_errno, "tmp_buf");
/* adjust for potential negative lower bound in datatype */
tmp_buf = (void *)((char*)tmp_buf - true_lb);
/* Since this is an inclusive scan, copy local contribution into
recvbuf. */
if (sendbuf != MPI_IN_PLACE) {
mpi_errno = MPIR_Localcopy(sendbuf, count, datatype,
recvbuf, count, datatype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
if (sendbuf != MPI_IN_PLACE)
mpi_errno = MPIR_Localcopy(sendbuf, count, datatype,
partial_scan, count, datatype);
else
mpi_errno = MPIR_Localcopy(recvbuf, count, datatype,
partial_scan, count, datatype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mask = 0x1;
while (mask < comm_size) {
dst = rank ^ mask;
if (dst < comm_size) {
/* Send partial_scan to dst. Recv into tmp_buf */
mpi_errno = MPIC_Sendrecv(partial_scan, count, datatype,
dst, MPIR_SCAN_TAG, tmp_buf,
count, datatype, dst,
MPIR_SCAN_TAG, comm,
&status, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
if (rank > dst) {
mpi_errno = MPIR_Reduce_local_impl(
tmp_buf, partial_scan, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mpi_errno = MPIR_Reduce_local_impl(
tmp_buf, recvbuf, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
else {
if (is_commutative) {
mpi_errno = MPIR_Reduce_local_impl(
tmp_buf, partial_scan, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
else {
mpi_errno = MPIR_Reduce_local_impl(
partial_scan, tmp_buf, count, datatype, op);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
mpi_errno = MPIR_Localcopy(tmp_buf, count, datatype,
partial_scan,
count, datatype);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
}
}
mask <<= 1;
}
if (MPIU_THREADPRIV_FIELD(op_errno)) {
mpi_errno = MPIU_THREADPRIV_FIELD(op_errno);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
fn_exit:
MPIU_CHKLMEM_FREEALL();
/* check if multiple threads are calling this collective function */
MPIDU_ERR_CHECK_MULTIPLE_THREADS_EXIT( comm_ptr );
if (mpi_errno_ret)
mpi_errno = mpi_errno_ret;
else if (*errflag)
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**coll_fail");
return mpi_errno;
fn_fail:
goto fn_exit;
}
/*@
MPI_Comm_spawn_multiple - short description
Input Parameters:
+ count - number of commands (positive integer, significant to MPI only at
root
. array_of_commands - programs to be executed (array of strings, significant
only at root)
. array_of_argv - arguments for commands (array of array of strings,
significant only at root)
. array_of_maxprocs - maximum number of processes to start for each command
(array of integer, significant only at root)
. array_of_info - info objects telling the runtime system where and how to
start processes (array of handles, significant only at root)
. root - rank of process in which previous arguments are examined (integer)
- comm - intracommunicator containing group of spawning processes (handle)
Output Parameters:
+ intercomm - intercommunicator between original group and newly spawned group
(handle)
- array_of_errcodes - one error code per process (array of integer)
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_ARG
.N MPI_ERR_INFO
.N MPI_ERR_SPAWN
@*/
int MPI_Comm_spawn_multiple(int count, char *array_of_commands[],
char **array_of_argv[], const int array_of_maxprocs[],
const MPI_Info array_of_info[], int root, MPI_Comm comm,
MPI_Comm *intercomm, int array_of_errcodes[])
{
static const char FCNAME[] = "MPI_Comm_spawn_multiple";
int mpi_errno = MPI_SUCCESS, i;
MPID_Comm *comm_ptr = NULL;
MPID_Comm *intercomm_ptr = NULL;
MPID_Info **array_of_info_ptrs = NULL;
MPIU_CHKLMEM_DECL(1);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_COMM_SPAWN_MULTIPLE);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_COMM_SPAWN_MULTIPLE);
/* Validate parameters, especially handles needing to be converted */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
# endif
/* Convert MPI object handles to object pointers */
MPID_Comm_get_ptr( comm, comm_ptr );
/* Validate parameters and objects (post conversion) */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate comm_ptr */
MPID_Comm_valid_ptr( comm_ptr, mpi_errno, FALSE );
/* If comm_ptr is not valid, it will be reset to null */
if (mpi_errno) goto fn_fail;
MPIR_ERRTEST_COMM_INTRA(comm_ptr, mpi_errno);
MPIR_ERRTEST_RANK(comm_ptr, root, mpi_errno);
if (comm_ptr->rank == root) {
MPIR_ERRTEST_ARGNULL(array_of_commands, "array_of_commands", mpi_errno);
MPIR_ERRTEST_ARGNULL(array_of_maxprocs, "array_of_maxprocs", mpi_errno);
MPIR_ERRTEST_ARGNONPOS(count, "count", mpi_errno, MPI_ERR_COUNT);
for (i = 0; i < count; i++)
{
MPIR_ERRTEST_INFO_OR_NULL(array_of_info[i], mpi_errno);
MPIR_ERRTEST_ARGNULL(array_of_commands[i], "array_of_commands[i]", mpi_errno);
MPIR_ERRTEST_ARGNEG(array_of_maxprocs[i], "array_of_maxprocs[i]", mpi_errno);
}
}
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
if (comm_ptr->rank == root) {
MPIU_CHKLMEM_MALLOC(array_of_info_ptrs, MPID_Info **, count * sizeof(MPID_Info*), mpi_errno, "array of info pointers");
for (i=0; i<count; i++)
{
MPID_Info_get_ptr(array_of_info[i], array_of_info_ptrs[i]);
}
}
