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odp-execute: Reuse rss hash in OVS_ACTION_ATTR_HASH.

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If RSS hash exists in a packet it can be reused instead of
5 tuple hash re-calculation in OVS_ACTION_ATTR_HASH. This
leads to increasing the performance of sending packets to
the OVS bonding in userspace datapath up to 10-15%.

Additionally fixed unit test 'select group with dp_hash
selection method' to not depend on dp_hash value.

Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Acked-by: Darrell Ball <dlu998@gmail.com>
Signed-off-by: Andy Zhou <azhou@ovn.org>
This commit is contained in:
Ilya Maximets
2017-07-13 18:07:03 +03:00
committed by Andy Zhou
parent 2575df07f6
commit 95a6cb3497
2 changed files with 11 additions and 4 deletions
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11
lib/odp-execute.c
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@@ -646,8 +646,15 @@ odp_execute_actions(void *dp, struct dp_packet_batch *batch, bool steal,
uint32_t hash;
DP_PACKET_BATCH_FOR_EACH (packet, batch) {
flow_extract(packet, &flow);
hash = flow_hash_5tuple(&flow, hash_act->hash_basis);
/* RSS hash can be used here instead of 5tuple for
* performance reasons. */
if (dp_packet_rss_valid(packet)) {
hash = dp_packet_get_rss_hash(packet);
hash = hash_int(hash, hash_act->hash_basis);
} else {
flow_extract(packet, &flow);
hash = flow_hash_5tuple(&flow, hash_act->hash_basis);
}
packet->md.dp_hash = hash;
}
} else {