On 15-09-15 06:51 PM, Alexei Starovoitov wrote: > Existing bpf_clone_redirect() helper clones skb before redirecting > it to RX or TX of destination netdev. > Introduce bpf_redirect() helper that does that without cloning. > > Benchmarked with two hosts using 10G ixgbe NICs. > One host is doing line rate pktgen. > Another host is configured as: > $ tc qdisc add dev $dev ingress > $ tc filter add dev $dev root pref 10 u32 match u32 0 0 flowid 1:2 \ > action bpf run object-file tcbpf1_kern.o section clone_redirect_xmit drop > so it receives the packet on $dev and immediately xmits it on $dev + 1 > The section 'clone_redirect_xmit' in tcbpf1_kern.o file has the program > that does bpf_clone_redirect() and performance is 2.0 Mpps > > $ tc filter add dev $dev root pref 10 u32 match u32 0 0 flowid 1:2 \ > action bpf run object-file tcbpf1_kern.o section redirect_xmit drop > which is using bpf_redirect() - 2.4 Mpps > > and using cls_bpf with integrated actions as: > $ tc filter add dev $dev root pref 10 \ > bpf run object-file tcbpf1_kern.o section redirect_xmit integ_act classid 1 > performance is 2.5 Mpps > > To summarize: > u32+act_bpf using clone_redirect - 2.0 Mpps > u32+act_bpf using redirect - 2.4 Mpps > cls_bpf using redirect - 2.5 Mpps > > For comparison linux bridge in this setup is doing 2.1 Mpps > and ixgbe rx + drop in ip_rcv - 7.8 Mpps > > Signed-off-by: Alexei Starovoitov <a...@plumgrid.com> > Acked-by: Daniel Borkmann <dan...@iogearbox.net> > ---
Nice, I like this. But just to be sure I read this correctly this will only work on the ingress qdisc for now right? To get the tx side working will require a bit more care. Thanks, .John -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
