/* returns the number of resource or resource composites found */
int64_t resrc_tree_search (resrc_t *resrc_in, resrc_reqst_t *resrc_reqst,
resrc_tree_t **found_tree, bool available)
{
int64_t nfound = 0;
resrc_tree_list_t *children = NULL;
resrc_tree_t *child_tree;
resrc_tree_t *new_tree = NULL;
if (!resrc_in || !found_tree || !resrc_reqst) {
goto ret;
}
if (resrc_match_resource (resrc_in, resrc_reqst, available)) {
if (resrc_reqst_num_children (resrc_reqst)) {
if (resrc_tree_num_children (resrc_phys_tree (resrc_in))) {
new_tree = resrc_tree_new (*found_tree, resrc_in);
children = resrc_tree_children (resrc_phys_tree (resrc_in));
if (match_children (children, resrc_reqst->children, new_tree,
available)) {
nfound = 1;
resrc_reqst->nfound++;
} else {
resrc_tree_destroy (new_tree, false);
}
}
} else {
(void) resrc_tree_new (*found_tree, resrc_in);
nfound = 1;
resrc_reqst->nfound++;
}
} else if (resrc_tree_num_children (resrc_phys_tree (resrc_in))) {
/*
* This clause visits the children of the current resource
* searching for a match to the resource request. The found
* tree must be extended to include this intermediate
* resource.
*
* This also allows the resource request to be sparsely
* defined. E.g., it might only stipulate a node with 4 cores
* and omit the intervening socket.
*/
if (*found_tree)
new_tree = resrc_tree_new (*found_tree, resrc_in);
else {
new_tree = resrc_tree_new (NULL, resrc_in);
*found_tree = new_tree;
}
children = resrc_tree_children (resrc_phys_tree (resrc_in));
child_tree = resrc_tree_list_first (children);
while (child_tree) {
nfound += resrc_tree_search (resrc_tree_resrc (child_tree),
resrc_reqst, &new_tree, available);
child_tree = resrc_tree_list_next (children);
}
}
ret:
return nfound;
}
/*
* Select some resources from the found tree
* frt is found resource tree
* prt is selected resource tree parent
*/
static resrc_tree_t *test_select_resources (resrc_tree_t *frt, resrc_tree_t *prt,
int select)
{
resrc_tree_t *selected_res = NULL;
if (frt) {
resrc_t *resrc = resrc_tree_resrc (frt);
if (!strcmp (resrc_type(resrc), "core")) {
if (resrc_id (resrc) == select)
resrc_stage_resrc (resrc, 1, NULL);
else
goto ret;
} else if (!strcmp (resrc_type(resrc), "memory"))
resrc_stage_resrc (resrc, 100, NULL);
selected_res = resrc_tree_new (prt, resrc);
if (resrc_tree_num_children (frt)) {
resrc_tree_t *child = resrc_tree_list_first (
resrc_tree_children (frt));
while (child) {
(void) test_select_resources (child, selected_res, select);
child = resrc_tree_list_next (resrc_tree_children (frt));
}
}
}
ret:
return selected_res;
}
/*
* select_resources() selects from the set of resource candidates the
* best resources for the job.
*
* Inputs: found_tree - tree of resource tree candidates
* resrc_reqst - the resources the job requests
* selected_parent - parent of the selected resource tree
* Returns: a resource tree of however many resources were selected
*/
resrc_tree_t *select_resources (flux_t *h, resrc_tree_t *found_tree,
resrc_reqst_t *resrc_reqst,
resrc_tree_t *selected_parent)
{
resrc_t *resrc;
resrc_tree_list_t *children = NULL;
resrc_tree_t *child_tree;
resrc_tree_t *selected_tree = NULL;
if (!resrc_reqst) {
flux_log (h, LOG_ERR, "%s: called with empty request", __FUNCTION__);
return NULL;
}
/*
* A start time of zero is used to restrict the search to now
* (appropriate for FCFS) and prevent any search into the future.
*/
if (resrc_reqst_set_starttime (resrc_reqst, 0) ||
resrc_reqst_set_endtime (resrc_reqst, 0))
return NULL;
resrc = resrc_tree_resrc (found_tree);
if (resrc_match_resource (resrc, resrc_reqst, true)) {
if (resrc_reqst_num_children (resrc_reqst)) {
if (resrc_tree_num_children (found_tree)) {
selected_tree = resrc_tree_new (selected_parent, resrc);
if (select_children (h, resrc_tree_children (found_tree),
resrc_reqst_children (resrc_reqst),
selected_tree)) {
resrc_stage_resrc (resrc,
resrc_reqst_reqrd_size (resrc_reqst),
resrc_reqst_graph_reqs (resrc_reqst));
resrc_reqst_add_found (resrc_reqst, 1);
flux_log (h, LOG_DEBUG, "selected %s", resrc_name (resrc));
} else {
resrc_tree_destroy (selected_tree, false);
}
}
} else {
selected_tree = resrc_tree_new (selected_parent, resrc);
resrc_stage_resrc (resrc, resrc_reqst_reqrd_size (resrc_reqst),
resrc_reqst_graph_reqs (resrc_reqst));
resrc_reqst_add_found (resrc_reqst, 1);
flux_log (h, LOG_DEBUG, "selected %s", resrc_name (resrc));
}
} else if (resrc_tree_num_children (found_tree)) {
/*
* This clause visits the children of the current resource
* searching for a match to the resource request. The selected
* tree must be extended to include this intermediate
* resource.
*
* This also allows the resource request to be sparsely
* defined. E.g., it might only stipulate a node with 4 cores
* and omit the intervening socket.
*/
selected_tree = resrc_tree_new (selected_parent, resrc);
children = resrc_tree_children (found_tree);
child_tree = resrc_tree_list_first (children);
while (child_tree) {
if (select_resources (h, child_tree, resrc_reqst, selected_tree) &&
resrc_reqst_nfound (resrc_reqst) >=
resrc_reqst_reqrd_qty (resrc_reqst))
break;
child_tree = resrc_tree_list_next (children);
}
}
return selected_tree;
}
