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openvswitch: collect mega flow mask stats

Browse source 
Collect mega flow mask stats. ovs-dpctl show command can be used to
display them for debugging and performance tuning.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Andy Zhou 2013-10-22 10:42:46 -07:00 • committed by Jesse Gross
parent 618ed0c805
commit 1bd7116f1c
5 changed files with 67 additions and 12 deletions
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16
net/openvswitch/flow_table.c
View file

@ -430,13 +430,16 @@ static struct sw_flow *masked_flow_lookup(struct table_instance *ti,
}
struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *tbl,
const struct sw_flow_key *key)
const struct sw_flow_key *key,
u32 *n_mask_hit)
{
struct table_instance *ti = rcu_dereference(tbl->ti);
struct sw_flow_mask *mask;
struct sw_flow *flow;
*n_mask_hit = 0;
list_for_each_entry_rcu(mask, &tbl->mask_list, list) {
(*n_mask_hit)++;
flow = masked_flow_lookup(ti, key, mask);
if (flow) /* Found */
return flow;
@ -444,6 +447,17 @@ struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *tbl,
return NULL;
}
int ovs_flow_tbl_num_masks(const struct flow_table *table)
{
struct sw_flow_mask *mask;
int num = 0;
list_for_each_entry(mask, &table->mask_list, list)
num++;
return num;
}
static struct table_instance *table_instance_expand(struct table_instance *ti)
{
return table_instance_rehash(ti, ti->n_buckets * 2);