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/*
* Copyright (c) 2004-2008 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2007-2013 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2010-2011 Los Alamos National Security, LLC.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#include "opal/constants.h"
#include "opal/util/output.h"
#include "opal/mca/mca.h"
#include "opal/mca/base/base.h"
#include "opal/mca/base/mca_base_param.h"
#include "opal/mca/shmem/shmem.h"
#include "opal/mca/shmem/base/base.h"
/*
* globals
*/
bool opal_shmem_base_selected = false;
const opal_shmem_base_component_2_0_0_t *opal_shmem_base_component = NULL;
const opal_shmem_base_module_2_0_0_t *opal_shmem_base_module = NULL;
/* ////////////////////////////////////////////////////////////////////////// */
char *
opal_shmem_base_best_runnable_component_name(void)
{
mca_base_component_t *best_component = NULL;
mca_base_module_t *best_module = NULL;
opal_output_verbose(10, opal_shmem_base_output,
"shmem: base: best_runnable_component_name: "
"Searching for best runnable component.");
/* select the best component so we can get its name. */
if (OPAL_SUCCESS != opal_shmem_base_runtime_query(&best_module,
&best_component)) {
/* fail! */
return NULL;
}
else {
if (NULL != best_component) {
opal_output_verbose(10, opal_shmem_base_output,
"shmem: base: best_runnable_component_name: "
"Found best runnable component: (%s).",
best_component->mca_component_name);
return strdup(best_component->mca_component_name);
}
else {
opal_output_verbose(10, opal_shmem_base_output,
"shmem: base: best_runnable_component_name: "
"Could not find runnable component.");
/* no component returned, so return NULL */
return NULL;
}
}
}
/* ////////////////////////////////////////////////////////////////////////// */
int
opal_shmem_base_runtime_query(mca_base_module_t **best_module,
mca_base_component_t **best_component)
{
mca_base_component_list_item_t *cli = NULL;
mca_base_component_t *component = NULL;
mca_base_module_t *module = NULL;
opal_list_item_t *item = NULL;
int priority = 0, best_priority = INT32_MIN;
char *env_hint_name = NULL, *env_hint_val = NULL;
*best_module = NULL;
*best_component = NULL;
opal_output_verbose(10, opal_shmem_base_output,
"shmem: base: runtime_query: "
"Auto-selecting shmem components");
/* we are using a nonstandard name here because shmem_RUNTIME_QUERY_hint
* is for internal use only!
* see odls_base_default_fns.c for more details.
*/
env_hint_name = mca_base_param_environ_variable("shmem_RUNTIME_QUERY_hint",
NULL, NULL);
env_hint_val = getenv(env_hint_name);
free(env_hint_name);
/* traverse the list of available components.
* for each call their 'run-time query' functions to determine relative
* priority.
*/
for (item = opal_list_get_first(&opal_shmem_base_components_opened);
item != opal_list_get_end(&opal_shmem_base_components_opened);
item = opal_list_get_next(item) ) {
cli = (mca_base_component_list_item_t *)item;
component = (mca_base_component_t *)cli->cli_component;
/* if there is a run-time query function then use it. otherwise, skip
* the component.
*/
if (NULL == ((opal_shmem_base_component_2_0_0_t *)
component)->runtime_query) {
opal_output_verbose(5, opal_shmem_base_output,
"shmem: base: runtime_query: "
"(shmem) Skipping component [%s]. It does not "
"implement a run-time query function",
component->mca_component_name);
continue;
}
/* query this component for the module and priority */
opal_output_verbose(5, opal_shmem_base_output,
"shmem: base: runtime_query: "
"(shmem) Querying component (run-time) [%s]",
component->mca_component_name);
((opal_shmem_base_component_2_0_0_t *)
component)->runtime_query(&module, &priority, env_hint_val);
/* if no module was returned, then skip component.
* this probably means that the run-time test deemed the shared memory
* backing facility unusable or unsafe.
*/
if (NULL == module) {
opal_output_verbose(5, opal_shmem_base_output,
"shmem: base: runtime_query: "
"(shmem) Skipping component [%s]. Run-time "
"Query failed to return a module",
component->mca_component_name);
continue;
}
/* determine if this is the best module we have seen by looking the
* priority
*/
opal_output_verbose(5, opal_shmem_base_output,
"shmem: base: runtime_query: "
"(%5s) Query of component [%s] set priority to %d",
"shmem", component->mca_component_name, priority);
if (priority > best_priority) {
best_priority = priority;
*best_module = module;
*best_component = component;
}
}
/* finished querying all components.
* make sure we found something in the process.
*/
if (NULL == *best_component) {
opal_output_verbose(5, opal_shmem_base_output,
"shmem: base: runtime_query: "
"(%5s) No component selected!", "shmem");
/* still close the non-selected components.
*/
mca_base_components_close(opal_shmem_base_output,
&opal_shmem_base_components_opened,
NULL, false);
return OPAL_ERR_NOT_FOUND;
}
opal_output_verbose(5, opal_shmem_base_output,
"shmem: base: runtime_query: "
"(%5s) Selected component [%s]", "shmem",
(*best_component)->mca_component_name);
/* close the non-selected components */
mca_base_components_close(opal_shmem_base_output,
&opal_shmem_base_components_opened,
(mca_base_component_t *)(*best_component),
false);
return OPAL_SUCCESS;
}
/* ////////////////////////////////////////////////////////////////////////// */
int
opal_shmem_base_select(void)
{
opal_shmem_base_component_2_0_0_t *best_component = NULL;
opal_shmem_base_module_2_0_0_t *best_module = NULL;
/* select the best component */
if (OPAL_SUCCESS != opal_shmem_base_runtime_query(
(mca_base_module_t **)&best_module,
(mca_base_component_t **)&best_component)) {
/* it is NOT okay if we don't find a module because we need at
* least one shared memory backing facility component instance.
*/
return OPAL_ERROR;
}
/* save the winner */
opal_shmem_base_component = best_component;
opal_shmem_base_module = best_module;
opal_shmem_base_selected = true;
/* initialize the winner */
if (NULL != opal_shmem_base_module) {
return opal_shmem_base_module->module_init();
}
else {
return OPAL_ERROR;
}
}
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