Interesting performance gain, copied in the OVS development mailing
list.
//Eelco
On 29 Sep 2019, at 19:09, xiangxia.m....@gmail.com wrote:
From: Tonghao Zhang <xiangxia.m....@gmail.com>
This series patch optimize openvswitch.
Patch 1, 2, 4: Port Pravin B Shelar patches to
linux upstream with little changes.
Patch 5, 6, 7: Optimize the flow looking up and
simplify the flow hash.
Patch 8: is a bugfix.
The performance test is on Intel Xeon E5-2630 v4.
The test topology is show as below:
+-----------------------------------+
| +---------------------------+ |
| | eth0 ovs-switch eth1 | | Host0
| +---------------------------+ |
+-----------------------------------+
^ |
| |
| |
| |
| v
+-----+----+ +----+-----+
| netperf | Host1 | netserver| Host2
+----------+ +----------+
We use netperf send the 64B frame, and insert 255+ flow-mask:
$ ovs-dpctl add-flow ovs-switch
"in_port(1),eth(dst=00:01:00:00:00:00/ff:ff:ff:ff:ff:01),eth_type(0x0800),ipv4(frag=no)"
2
...
$ ovs-dpctl add-flow ovs-switch
"in_port(1),eth(dst=00:ff:00:00:00:00/ff:ff:ff:ff:ff:ff),eth_type(0x0800),ipv4(frag=no)"
2
$ netperf -t UDP_STREAM -H 2.2.2.200 -l 40 -- -m 18
* Without series patch, throughput 8.28Mbps
* With series patch, throughput 46.05Mbps
Tonghao Zhang (9):
net: openvswitch: add flow-mask cache for performance
net: openvswitch: convert mask list in mask array
net: openvswitch: shrink the mask array if necessary
net: openvswitch: optimize flow mask cache hash collision
net: openvswitch: optimize flow-mask looking up
net: openvswitch: simplify the flow_hash
net: openvswitch: add likely in flow_lookup
net: openvswitch: fix possible memleak on destroy flow table
net: openvswitch: simplify the ovs_dp_cmd_new
net/openvswitch/datapath.c | 63 +++++----
net/openvswitch/flow.h | 1 -
net/openvswitch/flow_table.c | 318
+++++++++++++++++++++++++++++++++++++------
net/openvswitch/flow_table.h | 19 ++-
4 files changed, 330 insertions(+), 71 deletions(-)
--
1.8.3.1
