On Fri, Oct 20, 2023 at 2:12 AM Hariprasad Kelam <hkelam@xxxxxxxxxxx>[Hari]
wrote:
This patch extends current flow action with RSS, such that the user
can install flower offloads with action RSS followed by a group id.
Since this is done in hardware skip_sw flag is enforced.
Our typical rule for TC is we need s/w equivalence for offloads. How would
this work in absence of offload?
Our typical rule for TC is we need s/w equivalence for offloads. How would this work in absence of offload?
This patch we added as an extension to receive queue selection in hardware.
This patch "act_skbedit: skbedit queue mapping for receive queue" enabled receive queue selection in hardware
and skip_sw is enforced.
Adding stakeholders of this patch, to get their opinion.
sridhar.samudrala@xxxxxxxxx amritha.nambiar@xxxxxxxxx
incase of RSS, hardware makes decisions about incoming packets before they are even received in the queue.
Thanks,
Hariprasad k
cheers,
jamal
Example:
In a multi rss group supported NIC,
rss group #1 flow hash indirection table populated with rx queues 1 to
4 rss group #2 flow hash indirection table populated with rx queues 5
to 9
$tc filter add dev eth1 ingress protocol ip flower ip_proto tcp
dst_port
443 action skbedit rss_group 1 skip_sw
Packets destined to tcp port 443 will be distributed among rx queues 1
to 4
$tc filter add dev eth1 ingress protocol ip flower ip_proto udp
dst_port
8080 action skbedit rss_group 2 skip_sw
Packets destined to udp port 8080 will be distributed among rx queues
5 to 9