Re: Ethernet bridge performance

[Ben Greear <greearb@xxxxxxxxxxxxxxx>]

Felix Radensky wrote:

> I've mentioned in my first post that there are zero drops at driver level
> (as shown by ifconfig). I'm also using IRQ affinity feature, binding 
> interrupts
> of eth0 and eth1 to CPU0, so I guess NIC ring RX/TX size, link HW_FLOW 
> control
> and affinity are not my problems.
Maybe try un-binding the cpus, or binding them to different procs?

> Speaking of checksumming. This can be a problem indeed. ethtool -S shows 
> a lot
> of rx_csum_offload errors. Scott, what could possibly be a problem ? The 
> NIC
> is dual port 82546, driver is 5.1.13-k1.
Why would a bridge be checksumming anything?

> I've failed to find a discussion about ksoftird priority. Can someone 
> please
> provide a link.
I've increased my performance by setting softirqd priority to -18,
but since you seem to be dropping someplace other than the driver,
I'm not sure that will help.

> Thanks a lot.
>
> Felix.

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com