533dfff56d
make some compilers complain less about uninitialized values. This commit was SVN r13805.
149 строки
4.8 KiB
C
149 строки
4.8 KiB
C
/*
|
|
* Copyright (c) 2004-2005 The Regents of the University of California.
|
|
* All rights reserved.
|
|
* Copyright (c) 2004-2006 The University of Tennessee and The University
|
|
* of Tennessee Research Foundation. All rights
|
|
* reserved.
|
|
* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2007 Los Alamos National Security, LLC. All rights
|
|
* reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "ompi_config.h"
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "ompi/mca/pml/pml.h"
|
|
#include "ompi/communicator/communicator.h"
|
|
#include "ompi/request/request.h"
|
|
#include "ompi/runtime/mpiruntime.h"
|
|
#include "orte/mca/rml/rml.h"
|
|
#include "orte/mca/rml/rml_types.h"
|
|
|
|
/*
|
|
* do zero byte IRECV / ISEND: upper half sends to lower half (i.e. do
|
|
* a ping, not a ping pong)
|
|
*/
|
|
int ompi_init_do_preconnect(void)
|
|
{
|
|
int comm_size = ompi_comm_size(MPI_COMM_WORLD);
|
|
int my_rank = ompi_comm_rank(MPI_COMM_WORLD);
|
|
int i, ret;
|
|
int next,prev;
|
|
struct ompi_request_t * requests[2];
|
|
ret = OMPI_SUCCESS;
|
|
if(comm_size == 2) {
|
|
if(my_rank){
|
|
ret = MCA_PML_CALL(send(MPI_BOTTOM, 0, MPI_BYTE,
|
|
0, 1,
|
|
MCA_PML_BASE_SEND_STANDARD,
|
|
MPI_COMM_WORLD));
|
|
if(OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
} else {
|
|
ret = MCA_PML_CALL(recv(MPI_BOTTOM,0, MPI_BYTE, 1,
|
|
1, MPI_COMM_WORLD,
|
|
MPI_STATUS_IGNORE));
|
|
if(OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
}
|
|
} else {
|
|
for (i = 1; i <= comm_size/2; ++i) {
|
|
next = (my_rank + i) % comm_size;
|
|
prev = (my_rank - i + comm_size) % comm_size;
|
|
ret = MCA_PML_CALL(irecv(MPI_BOTTOM,0, MPI_BYTE,
|
|
prev, 1,
|
|
MPI_COMM_WORLD,
|
|
&requests[0]));
|
|
if(OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
ret = MCA_PML_CALL(isend(MPI_BOTTOM, 0, MPI_BYTE,
|
|
next, 1,
|
|
MCA_PML_BASE_SEND_STANDARD,
|
|
MPI_COMM_WORLD,
|
|
&requests[1]));
|
|
if (OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
ret = ompi_request_wait_all(2, requests, MPI_STATUSES_IGNORE);
|
|
if (OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int ompi_init_do_oob_preconnect(void)
|
|
{
|
|
size_t world_size, i, next, prev, my_index;
|
|
ompi_proc_t **procs;
|
|
int ret;
|
|
struct iovec msg[1];
|
|
|
|
procs = ompi_proc_world(&world_size);
|
|
|
|
msg[0].iov_base = NULL;
|
|
msg[0].iov_len = 0;
|
|
|
|
if (world_size == 2) {
|
|
if (ompi_proc_local() == procs[0]) {
|
|
ret = orte_rml.send(&procs[1]->proc_name,
|
|
msg,
|
|
1,
|
|
ORTE_RML_TAG_WIREUP,
|
|
0);
|
|
if (ret < 0) return ret;
|
|
} else {
|
|
ret = orte_rml.recv(&procs[0]->proc_name,
|
|
msg,
|
|
1,
|
|
ORTE_RML_TAG_WIREUP,
|
|
0);
|
|
if (ret < 0) return ret;
|
|
}
|
|
} else if (world_size > 2) {
|
|
for (i = 0 ; i < world_size ; ++i) {
|
|
if (ompi_proc_local() == procs[i]) {
|
|
my_index = i;
|
|
/* Do all required preconnections */
|
|
for (i = 1 ; i <= world_size / 2 ; ++i) {
|
|
next = (my_index + i) % world_size;
|
|
prev = (my_index - i + world_size) % world_size;
|
|
|
|
/* sends do not wait for a match */
|
|
ret = orte_rml.send(&procs[next]->proc_name,
|
|
msg,
|
|
1,
|
|
ORTE_RML_TAG_WIREUP,
|
|
0);
|
|
if (ret < 0) return ret;
|
|
|
|
ret = orte_rml.recv(&procs[prev]->proc_name,
|
|
msg,
|
|
1,
|
|
ORTE_RML_TAG_WIREUP,
|
|
0);
|
|
if (ret < 0) return ret;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|