Commit cb160394 authored May 24, 2018 by Davide Caratti Committed by David S. Miller May 28, 2018

vrf: add CRC32c offload to device features

SCTP sockets originated in a VRF can improve their performance if CRC32c
computation is delegated to underlying devices: update device features,
setting NETIF_F_SCTP_CRC. Iterating the following command in the topology
proposed with [1],

 # ip vrf exec vrf-h2 netperf -H 192.0.2.1 -t SCTP_STREAM -- -m 10K

the measured throughput in Mbit/s improved from 2395 ± 1% to 2720 ± 1%.

[1] https://www.spinics.net/lists/netdev/msg486007.html



Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 29555fa3

drivers/net/vrf.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1254,7 +1254,7 @@ static void vrf_setup(struct net_device *dev)

		/* enable offload features */
		dev->features \|= NETIF_F_GSO_SOFTWARE;
		dev->features \|= NETIF_F_RXCSUM \| NETIF_F_HW_CSUM;
		dev->features \|= NETIF_F_RXCSUM \| NETIF_F_HW_CSUM \| NETIF_F_SCTP_CRC;
		dev->features \|= NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA;

		dev->hw_features = dev->features;

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