On 31.01.2024 02:37, Takeru Hayasaka wrote: > This is a patch that enables RSS functionality for GTP packets using ethtool. > > A user can include TEID and make RSS work for GTP-U over IPv4 by doing the > following:`ethtool -N ens3 rx-flow-hash gtpu4 sde` > > In addition to gtpu(4|6), we now support gtpc(4|6),gtpc(4|6)t,gtpu(4|6)e, > gtpu(4|6)u, and gtpu(4|6)d. > > gtpc(4|6): Used for GTP-C in IPv4 and IPv6, where the GTP header format does > not include a TEID. > gtpc(4|6)t: Used for GTP-C in IPv4 and IPv6, with a GTP header format that > includes a TEID. > gtpu(4|6): Used for GTP-U in both IPv4 and IPv6 scenarios. > gtpu(4|6)e: Used for GTP-U with extended headers in both IPv4 and IPv6. > gtpu(4|6)u: Used when the PSC (PDU session container) in the GTP-U extended > header includes Uplink, applicable to both IPv4 and IPv6. > gtpu(4|6)d: Used when the PSC in the GTP-U extended header includes Downlink, > for both IPv4 and IPv6. > > GTP generates a flow that includes an ID called TEID to identify the tunnel. > This tunnel is created for each UE (User Equipment).By performing RSS based on > this flow, it is possible to apply RSS for each communication unit from the UE. > Without this, RSS would only be effective within the range of IP addresses. For > instance, the PGW can only perform RSS within the IP range of the SGW. > Problematic from a load distribution perspective, especially if there's a bias > in the terminals connected to a particular base station.This case can be > solved by using this patch. LGTM Reviewed-by: Marcin Szycik <marcin.szycik@xxxxxxxxxxxxxxx> > Signed-off-by: Takeru Hayasaka <hayatake396@xxxxxxxxx> > --- > v2->v3: Based on Harald-san's review, I added documentation and comments to > ethtool.h and ice.rst. > v3->v4: Based on Marcin-san's review, I added the missing code for GTPC and > GTPC_TEID, and revised the documentation and comments. > v4->v5: Based on Marcin-san's review, I fixed rename and wrong code regarding > GTPC [...] > f Hash on bytes 0 and 1 of the Layer 4 header of the Rx packet. > n Hash on bytes 2 and 3 of the Layer 4 header of the Rx packet. > - Still removing this line :c > + e Hash on GTP Packet on TEID (4bytes) of the Rx packet. > > Accelerated Receive Flow Steering (aRFS) > ---------------------------------------- ---8<---
