mir/ovs
2
0
Fork 0
mirror of https://github.com/openvswitch/ovs synced 2025-08-31 06:15:47 +00:00
Code Issues Releases Wiki Activity

tunneling: Avoid datapath-recirc by combining recirc actions at xlate.

Browse Source 
This patch set removes the recirculation of encapsulated tunnel packets
if possible. It is done by computing the post tunnel actions at the time of
translation. The combined nested action set are programmed in the datapath
using CLONE action.

The following test results shows the performance improvement offered by
this optimization for tunnel encap.

          +-------------+
      dpdk0 |             |
         -->o    br-in    |
            |             o--> gre0
            +-------------+

                   --> LOCAL
            +-----------o-+
            |             | dpdk1
            |    br-p1    o-->
            |             |
            +-------------+

Test result on OVS master with DPDK 16.11.2 (Without optimization):

 # dpdk0

 RX packets         : 7037641.60  / sec
 RX packet errors   : 0  / sec
 RX packets dropped : 7730632.90  / sec
 RX rate            : 402.69 MB/sec

 # dpdk1

 TX packets         : 7037641.60  / sec
 TX packet errors   : 0  / sec
 TX packets dropped : 0  / sec
 TX rate            : 657.73 MB/sec
 TX processing cost per TX packets in nsec : 142.09

Test result on OVS master + DPDK 16.11.2 (With optimization):

 # dpdk0

 RX packets         : 9386809.60  / sec
 RX packet errors   : 0  / sec
 RX packets dropped : 5381496.40  / sec
 RX rate            : 537.11 MB/sec

 # dpdk1

 TX packets         : 9386809.60  / sec
 TX packet errors   : 0  / sec
 TX packets dropped : 0  / sec
 TX rate            : 877.29 MB/sec
 TX processing cost per TX packets in nsec : 106.53

The offered performance gain is approx 30%.

Signed-off-by: Sugesh Chandran <sugesh.chandran@intel.com>
Signed-off-by: Zoltán Balogh <zoltan.balogh@ericsson.com>
Co-authored-by: Zoltán Balogh <zoltan.balogh@ericsson.com>
Signed-off-by: Joe Stringer <joe@ovn.org>
This commit is contained in:
Sugesh Chandran
2017-07-19 14:46:03 +01:00
committed by Joe Stringer
parent ce8bbd37ff
commit 7c12dfc527
8 changed files with 295 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
lib/dpif-netdev.c
View File

@@ -5048,24 +5048,8 @@ dp_execute_cb(void *aux_, struct dp_packet_batch *packets_,
case OVS_ACTION_ATTR_TUNNEL_PUSH:
if (*depth < MAX_RECIRC_DEPTH) {
struct dp_packet_batch tnl_pkt;
struct dp_packet_batch *orig_packets_ = packets_;
int err;
if (!may_steal) {
dp_packet_batch_clone(&tnl_pkt, packets_);
packets_ = &tnl_pkt;
dp_packet_batch_reset_cutlen(orig_packets_);
}
dp_packet_batch_apply_cutlen(packets_);
err = push_tnl_action(pmd, a, packets_);
if (!err) {
(*depth)++;
dp_netdev_recirculate(pmd, packets_);
(*depth)--;
}
push_tnl_action(pmd, a, packets_);
return;
}
break;