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Date: Fri, 10 Apr 2015 18:41:17 -0700 From: Alexei Starovoitov <ast@...mgrid.com> To: Cong Wang <cwang@...pensource.com>, Daniel Borkmann <daniel@...earbox.net> CC: David Miller <davem@...emloft.net>, Jamal Hadi Salim <jhs@...atatu.com>, Eric Dumazet <edumazet@...gle.com>, netdev <netdev@...r.kernel.org> Subject: Re: [PATCH net-next] net: use jump label patching for ingress qdisc in __netif_receive_skb_core On 4/10/15 6:14 PM, Cong Wang wrote: > So the following code is slow enough to deserve a static key > optimization? > > struct netdev_queue *rxq = rcu_dereference(skb->dev->ingress_queue); > > if (!rxq || rcu_access_pointer(rxq->qdisc) == &noop_qdisc) > goto out; It helps a little bit here and helps even more to my ingress_l2 patch that is based on top of this one. Every cycle counts. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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