[ovs-dev] Drop in Rx rate if host kernel is only loaded with openvswitch.ko kernel module.

Jesse Gross jesse at nicira.com
Tue Sep 29 07:02:58 UTC 2015


On Mon, Sep 28, 2015 at 10:28 PM,  <ravulakollu.kumar at wipro.com> wrote:
> Hi Jesse ,
>
> Thanks for your reply. The other modules I am talking about are not ovs vport-vxlan and vport-gre.
>
> They are Linux kernels vxlan.ko(/lib/modules/3.10.0-123.20.1.el7.x86_64/kernel/drivers/net/vxlan.ko) and gre.ko (/lib/modules/3.10.0-123.20.1.el7.x86_64/kernel/net/ipv4/gre.ko).
>
> When I do modprobe openvswitch,  please find lsmod | grep openvswitch output below.

I think you are loading different versions of the kernel module
depending on what commands you run. It sounds like when you do insmod,
you are inserting the out of tree module packages with OVS 2.4. When
you use depmod, the system path is finding the version packaged with
your distribution kernel.

Given that there is a performance difference, it sounds like there is
a bug in the more recent version (2.4). Can you run top to see what
the CPU usage is like and also check dmesg for error messages?



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