[ovs-dev] [PATCH] netdev-dpdk: Fix sw stats perf drop.

[Ilya Maximets]

On 17.12.2019 16:07, Kevin Traynor wrote:
> Accessing the sw stats in the vhost datapath of a PVP test
> can incur a performance drop of ~2%.
> 
> Most of the time these stats will just be getting zero added
> to them. By checking if there is a non-zero update first, we
> can avoid accessing them when they won't be updated and avoid
> the performance drop.
> 
> Fixes: 2f862c712e52 ("netdev-dpdk: Detailed packet drop statistics.")
> Signed-off-by: Kevin Traynor <ktraynor at redhat.com>
> ---

We actually have similar checks for physical ports, so it's sane
to have them for vhost too.

Thanks Kevin and Eelco! Applied to master.

Best regards, Ilya Maximets.