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/*
* Copyright (c) 2004-2009 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2010-2012 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
* Simple routine to expose three things to the MPI process:
*
* 1. What processor(s) Open MPI bound this process to
* 2. What processor(s) this process is bound to
* 3. What processor(s) exist on this host
*
* Note that 1 and 2 may be different!
*/
#include "ompi_config.h"
#include <stdio.h>
#include <string.h>
#include "opal/mca/paffinity/base/base.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/mpi/c/bindings.h"
#include "ompi/mpiext/affinity/mpiext_affinity_c.h"
static const char FUNC_NAME[] = "OMPI_Affinity";
static int get_rsrc_ompi_bound(char str[OMPI_AFFINITY_STRING_MAX]);
static int get_rsrc_current_binding(char str[OMPI_AFFINITY_STRING_MAX]);
static int get_rsrc_exists(char str[OMPI_AFFINITY_STRING_MAX]);
static int get_layout_ompi_bound(char str[OMPI_AFFINITY_STRING_MAX]);
static int get_layout_current_binding(char str[OMPI_AFFINITY_STRING_MAX]);
static int get_layout_exists(char str[OMPI_AFFINITY_STRING_MAX]);
int OMPI_Affinity_str(ompi_affinity_fmt_t fmt_type,
char ompi_bound[OMPI_AFFINITY_STRING_MAX],
char current_binding[OMPI_AFFINITY_STRING_MAX],
char exists[OMPI_AFFINITY_STRING_MAX])
{
int ret;
memset(ompi_bound, 0, sizeof(ompi_bound));
memset(current_binding, 0, sizeof(current_binding));
switch(fmt_type) {
case OMPI_AFFINITY_RSRC_STRING_FMT:
if (OPAL_SUCCESS != (ret = get_rsrc_ompi_bound(ompi_bound)) ||
OPAL_SUCCESS != (ret = get_rsrc_current_binding(current_binding)) ||
OPAL_SUCCESS != (ret = get_rsrc_exists(exists))) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, ret, FUNC_NAME);
}
break;
case OMPI_AFFINITY_LAYOUT_FMT:
if (OPAL_SUCCESS != (ret = get_layout_ompi_bound(ompi_bound)) ||
OPAL_SUCCESS != (ret = get_layout_current_binding(current_binding)) ||
OPAL_SUCCESS != (ret = get_layout_exists(exists))) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, ret, FUNC_NAME);
}
break;
default:
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG, FUNC_NAME);
}
return MPI_SUCCESS;
}
static int get_rsrc_ompi_bound(char str[OMPI_AFFINITY_STRING_MAX])
{
int ret;
opal_paffinity_base_cpu_set_t cset;
/* If OMPI did not bind, indicate that */
if (!opal_paffinity_base_bound) {
const char tmp[] = "Open MPI did not bind this process";
strncpy(str, tmp, OMPI_AFFINITY_STRING_MAX - 1);
return OPAL_SUCCESS;
}
/* Find out what OMPI bound us to and prettyprint it */
ret =
opal_paffinity_base_parse_binding(opal_paffinity_base_applied_binding,
&cset);
if (OPAL_SUCCESS != ret) {
return ret;
}
return opal_paffinity_base_cset2str(str, OMPI_AFFINITY_STRING_MAX, &cset);
}
static int get_rsrc_current_binding(char str[OMPI_AFFINITY_STRING_MAX])
{
int ret, flag;
opal_paffinity_base_cpu_set_t cset;
/* Get our binding */
ret = opal_paffinity_base_get(&cset);
if (OPAL_SUCCESS != ret) {
return ret;
}
/* Are we bound anywhere? */
OPAL_PAFFINITY_PROCESS_IS_BOUND(cset, &flag);
if (!flag) {
const char tmp[] = "Not bound (or bound to all available processors)";
strncat(str, tmp, OMPI_AFFINITY_STRING_MAX - 1);
return OPAL_SUCCESS;
}
return opal_paffinity_base_cset2str(str, OMPI_AFFINITY_STRING_MAX, &cset);
}
/* Prettyprint a list of all available processors */
static int get_rsrc_exists(char str[OMPI_AFFINITY_STRING_MAX])
{
int ret, i, num_sockets, num_cores;
char tmp[BUFSIZ];
const int stmp = sizeof(tmp) - 1;
str[0] = tmp[stmp] = '\0';
/* Loop over the number of sockets in this machine */
ret = opal_paffinity_base_get_socket_info(&num_sockets);
if (OPAL_SUCCESS != ret) {
return ret;
}
for (i = 0; i < num_sockets; ++i) {
if (i > 0) {
strncat(str, ", ", OMPI_AFFINITY_STRING_MAX - strlen(str));
}
snprintf(tmp, stmp, "socket %d has ", i);
strncat(str, tmp, OMPI_AFFINITY_STRING_MAX - strlen(str));
/* Loop over the number of cores in this socket */
ret = opal_paffinity_base_get_core_info(i, &num_cores);
if (OPAL_SUCCESS != ret) {
return ret;
}
if (1 == num_cores) {
strncat(str, "1 core", OMPI_AFFINITY_STRING_MAX - strlen(str));
} else {
snprintf(tmp, stmp, "%d cores", num_cores);
strncat(str, tmp, OMPI_AFFINITY_STRING_MAX - strlen(str));
}
}
return OPAL_SUCCESS;
}
static int get_layout_ompi_bound(char str[OMPI_AFFINITY_STRING_MAX])
{
int ret;
opal_paffinity_base_cpu_set_t cset;
/* If OMPI did not bind, indicate that */
if (!opal_paffinity_base_bound) {
const char tmp[] = "Open MPI did not bind this process";
strncpy(str, tmp, OMPI_AFFINITY_STRING_MAX - 1);
return OPAL_SUCCESS;
}
/* Find out what OMPI bound us to and prettyprint it */
ret =
opal_paffinity_base_parse_binding(opal_paffinity_base_applied_binding,
&cset);
if (OPAL_SUCCESS != ret) {
return ret;
}
return opal_paffinity_base_cset2mapstr(str, OMPI_AFFINITY_STRING_MAX, &cset);
}
static int get_layout_current_binding(char str[OMPI_AFFINITY_STRING_MAX])
{
int ret = OPAL_SUCCESS, flag;
opal_paffinity_base_cpu_set_t cset;
/* Get our binding */
ret = opal_paffinity_base_get(&cset);
if (OPAL_SUCCESS != ret) {
return ret;
}
/* Are we bound anywhere? */
OPAL_PAFFINITY_PROCESS_IS_BOUND(cset, &flag);
if (!flag) {
const char tmp[] = "Not bound (or bound to all available processors)";
strncat(str, tmp, OMPI_AFFINITY_STRING_MAX - 1);
return OPAL_SUCCESS;
}
return opal_paffinity_base_cset2mapstr(str, OMPI_AFFINITY_STRING_MAX, &cset);
}
/* Prettyprint a list of all available processors in layout format*/
static int get_layout_exists(char str[OMPI_AFFINITY_STRING_MAX])
{
int ret, i, j, num_sockets, num_cores;
int len = OMPI_AFFINITY_STRING_MAX;
str[0] = '\0';
/* Loop over the number of sockets in this machine */
ret = opal_paffinity_base_get_socket_info(&num_sockets);
if (OPAL_SUCCESS != ret) {
return ret;
}
for (i = 0; i < num_sockets; ++i) {
strncat(str, "[", len - strlen(str));
/* Loop over the number of cores in this socket */
ret = opal_paffinity_base_get_core_info(i, &num_cores);
if (OPAL_SUCCESS != ret) {
return ret;
}
for (j = 0; j < num_cores; j++) {
if (0 < j) {
/* add space after first core is printed */
strncat(str, " ", len - strlen(str));
}
/* mark core exists */
strncat(str, ".", len - strlen(str));
}
strncat(str, "]", len - strlen(str));
}
return OPAL_SUCCESS;
}
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