[ovs-discuss] High CPU Usage by ovs-vswitchd

[Kris zhang]

Maybe there is a network loop, you can use tcpdump to check. Or you
can use ovs-dpctl, it's a useful command.

BR,
Kris


On Thu, Jun 6, 2013 at 10:19 PM, Jose Alberto Posada
<joseaporo at gmail.com> wrote:
> Hello I need help,
> We have a setup in which a core network server running. We have
> installed openvswitch (1.9.0) in the same server (running Ubuntu-13.04
> raring server 64bit).
> The CPU usage shoots up to 98-100% (on a quad core Intel(R) Xeon(R)
> CPU E5420  @ 2.50GHz), here is the configuration:
>
> ~$ sudo ovs-vsctl show
> 758c9ac6-c35f-48ff-be24-b1722d963c81
>     Bridge "br0"
>         Port "bond12"
>             trunks: [7, 9, 59, 102, 113, 208, 301, 302, 303, 304, 305,
> 306, 307, 308, 309, 310, 651, 652, 700, 701]
>             Interface "eth2"
>             Interface "eth1"
>         Port "br0"
>             tag: 701
>             Interface "br0"
>                 type: internal
>         Port "veth12"
>             trunks: [7, 9, 59, 102, 113, 208, 301, 302, 303, 304, 305,
> 306, 307, 308, 309, 310, 651, 652, 700, 701]
>             Interface "veth12"
>         Port "veth34"
>             trunks: [5, 6, 8, 11, 49, 50, 53, 54, 56, 58, 89, 90, 144,
> 181, 182, 183, 184, 190, 191, 192, 193, 194, 195, 244, 245, 702, 1080]
>             Interface "veth34"
>         Port "eth0"
>             trunks: [81, 82, 83, 104, 106, 110, 128, 129, 131, 132,
> 133, 141, 142, 143, 160, 176, 242, 243, 650]
>             Interface "eth0"
>         Port "bond34"
>             trunks: [5, 6, 8, 11, 49, 50, 53, 54, 56, 58, 89, 90, 144,
> 181, 182, 183, 184, 190, 191, 192, 193, 194, 195, 244, 245, 702, 1080]
>             Interface "eth4"
>             Interface "eth3"
>         Port "veth0"
>             trunks: [81, 82, 83, 104, 106, 110, 128, 129, 131, 132,
> 133, 141, 142, 143, 160, 176, 242, 243, 650]
>             Interface "veth0"
>     ovs_version: "1.9.0"
>
> ~$ sudo ovs-dpctl show
> system at br0:
>         lookups: hit:367280347 missed:17177097 lost:517505
>         flows: 1145
>         port 0: br0 (internal)
>         port 1: eth1
>         port 2: eth2
>         port 3: eth3
>         port 4: eth0
>         port 5: eth4
>         port 12: veth0
>         port 13: veth12
>         port 14: veth34
>
> ovs-vsctl set bridge br0 other_config:flow-eviction-threshold=10000
>
> Is there anything else we can do to reduce CPU usage?
> Is there any other configuration for deployment in production that we
> missed?
>
> Best regards
> Jose Posada
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