netdev - [PATCH net-next 0/9] optimize openvswitch flow looking up

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Message-Id: <1569777006-7435-1-git-send-email-xiangxia.m.yue@gmail.com>
Date:   Mon, 30 Sep 2019 01:09:57 +0800
From:   xiangxia.m.yue@...il.com
To:     gvrose8192@...il.com, pshelar@....org
Cc:     netdev@...r.kernel.org, Tonghao Zhang <xiangxia.m.yue@...il.com>
Subject: [PATCH net-next 0/9] optimize openvswitch flow looking up

From: Tonghao Zhang <xiangxia.m.yue@...il.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