[ovs-discuss] performance drop 60% when using vxlan tunnel
jesse at nicira.com
Thu Nov 6 15:27:36 UTC 2014
On Wed, Nov 5, 2014 at 10:58 PM, FengYu LeiDian
<fengyuleidian0615 at gmail.com> wrote:
> 于 2014年11月06日 00:08, Jesse Gross 写道:
>> On Tue, Nov 4, 2014 at 11:03 PM, FengYu LeiDian
>> <fengyuleidian0615 at gmail.com> wrote:
>>> Env: redhat 6.4, OpenvSwitch-2.1.2, using native
>>> datapath/linux/openvswitch.ko module
>>> VM1 on host1, VM2 on host2, host1 and host2 are connected by a switch.
>>> both VM enable virtio/vhost when launching VM
>>> VM -> tap -> ovs-bridge -> eth1
>>> VM -> tap -> ovs-bridge -> vxlan -> eth1
>>> When using vxlan in case2, iperf performance drop 60%,
>> Your NIC probably doesn't support offloads (checksum, TSO, etc.) in
>> the presence of VXLAN.
> This is the default features supported by my NIC 82599 both in case1 and
I can assure you that this NIC does not support VXLAN and the stack is
being forced to do segmentation in software.
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