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MEDIUM: ebtree: specify the scope of every node inserted via eb32sc

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Here we mark each visited node with the scope bits of the node being
inserted. This will allow the lookup to skip certain non-interesting
nodes.
This commit is contained in:
Willy Tarreau 2017-11-05 14:06:50 +01:00
parent ca30839a85
commit 5d19fd479a
1 changed files with 23 additions and 2 deletions
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25
ebtree/eb32sctree.c
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@ -28,6 +28,7 @@
*/
REGPRM1 struct eb32sc_node *eb32sc_insert_dup(struct eb_node *sub, struct eb_node *new, unsigned long scope)
{
struct eb32sc_node *eb32;
struct eb_node *head = sub;
eb_troot_t *new_left = eb_dotag(&new->branches, EB_LEFT);
eb_troot_t *new_rght = eb_dotag(&new->branches, EB_RGHT);
@ -36,10 +37,16 @@ REGPRM1 struct eb32sc_node *eb32sc_insert_dup(struct eb_node *sub, struct eb_nod
/* first, identify the deepest hole on the right branch */
while (eb_gettag(head->branches.b[EB_RGHT]) != EB_LEAF) {
struct eb_node *last = head;
head = container_of(eb_untag(head->branches.b[EB_RGHT], EB_NODE),
struct eb_node, branches);
eb32 = container_of(head, struct eb32sc_node, node);
if (head->bit > last->bit + 1)
sub = head; /* there's a hole here */
if ((eb32->node_s | scope) != eb32->node_s)
eb32->node_s |= scope;
}
/* Here we have a leaf attached to (head)->b[EB_RGHT] */
@ -55,7 +62,9 @@ REGPRM1 struct eb32sc_node *eb32sc_insert_dup(struct eb_node *sub, struct eb_nod
sub->leaf_p = new_left;
new->branches.b[EB_LEFT] = eb_dotag(&sub->branches, EB_LEAF);
new->branches.b[EB_RGHT] = new_leaf;
return container_of(new, struct eb32sc_node, node);
eb32 = container_of(new, struct eb32sc_node, node);
eb32->node_s = container_of(sub, struct eb32sc_node, node)->leaf_s | scope;
return eb32;
} else {
int side;
/* No hole was found before a leaf. We have to insert above
@ -73,7 +82,9 @@ REGPRM1 struct eb32sc_node *eb32sc_insert_dup(struct eb_node *sub, struct eb_nod
sub->node_p = new_left;
new->branches.b[EB_LEFT] = eb_dotag(&sub->branches, EB_NODE);
new->branches.b[EB_RGHT] = new_leaf;
return container_of(new, struct eb32sc_node, node);
eb32 = container_of(new, struct eb32sc_node, node);
eb32->node_s = container_of(sub, struct eb32sc_node, node)->node_s | scope;
return eb32;
}
}
@ -90,6 +101,7 @@ REGPRM2 struct eb32sc_node *eb32sc_insert(struct eb_root *root, struct eb32sc_no
eb_troot_t *new_left, *new_rght;
eb_troot_t *new_leaf;
int old_node_bit;
unsigned long old_scope;
side = EB_LEFT;
troot = root->b[EB_LEFT];
@ -98,6 +110,8 @@ REGPRM2 struct eb32sc_node *eb32sc_insert(struct eb_root *root, struct eb32sc_no
root->b[EB_LEFT] = eb_dotag(&new->node.branches, EB_LEAF);
new->node.leaf_p = eb_dotag(root, EB_LEFT);
new->node.node_p = NULL; /* node part unused */
new->node_s = scope;
new->leaf_s = scope;
return new;
}
@ -121,6 +135,7 @@ REGPRM2 struct eb32sc_node *eb32sc_insert(struct eb_root *root, struct eb32sc_no
struct eb32sc_node, node.branches);
new->node.node_p = old->node.leaf_p;
up_ptr = &old->node.leaf_p;
old_scope = old->leaf_s;
break;
}
@ -142,10 +157,14 @@ REGPRM2 struct eb32sc_node *eb32sc_insert(struct eb_root *root, struct eb32sc_no
*/
new->node.node_p = old->node.node_p;
up_ptr = &old->node.node_p;
old_scope = old->node_s;
break;
}
/* walk down */
if ((old->node_s | scope) != old->node_s)
old->node_s |= scope;
root = &old->node.branches;
side = (newkey >> old_node_bit) & EB_NODE_BRANCH_MASK;
troot = root->b[side];
@ -164,6 +183,8 @@ REGPRM2 struct eb32sc_node *eb32sc_insert(struct eb_root *root, struct eb32sc_no
// note that if EB_NODE_BITS > 1, we should check that it's still >= 0
new->node.bit = flsnz(new->key ^ old->key) - EB_NODE_BITS;
new->leaf_s = scope;
new->node_s = old_scope | scope;
if (new->key == old->key) {
new->node.bit = -1; /* mark as new dup tree, just in case */