FreeNAS 11.2 NFS and Receive Side Scaling

[dblueman]

Was anyone able to activate Receive Side Scaling or similar on FreeNAS 11.x with Intel 10GbE NICs (ix driver)?

When performing a single large-block read via 'dd' from a Linux NFS client out of the FreeNAS server's pagecache, we see activity spread among all 64 cores (4x AMD 6380), which therefore carries a huge NUMA penalty and explain the 200MB/s limit we see.

Thanks!
Daniel

 

[mgutt]

we see activity spread among all 64 cores

This is the target of RSS:

https://www.kernel.org/doc/Documentation/networking/scaling.txt

Packets for each flow are steered to a separate receive
queue, which in turn can be processed by separate CPUs.

CPUs = Cores

Or do you mean RDMA?