mbox series

[RFC,0/2] Convert GRO receive over to hash table.

Message ID 20180624.141337.912478766766100321.davem@davemloft.net
Headers show
Series Convert GRO receive over to hash table. | expand

Message

David Miller June 24, 2018, 5:13 a.m. UTC 
When many parallel flows are present and being received on the same
RX queue, GRO processing can become expensive because each incoming
frame must traverse the per-NAPI GRO list at each protocol layer
of GRO receive (eth --> ipv{4,6} --> tcp).

Use the already computed hash to chain these SKBs in a hash table
instead of a simple list.

The first patch makes the GRO list a true list_head.

The second patch implements the hash table.

This series patches basic testing and I added some diagnostics
to make sure we really were aggregating GRO frames :-)

Signed-off-by: David S. Miller <davem@davemloft.net>