From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next 0/2] tcp: final work on SYNFLOOD behavior Date: Fri, 15 Apr 2016 16:46:13 -0400 (EDT) Message-ID: <20160415.164613.240856722381350785.davem@davemloft.net> References: <1460610340-22163-1-git-send-email-edumazet@google.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com To: edumazet@google.com Return-path: Received: from shards.monkeyblade.net ([149.20.54.216]:52146 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751142AbcDOUqP (ORCPT ); Fri, 15 Apr 2016 16:46:15 -0400 In-Reply-To: <1460610340-22163-1-git-send-email-edumazet@google.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet Date: Wed, 13 Apr 2016 22:05:38 -0700 > In the first patch, I remove the costly association of SYNACK+COOKIES > to a listener. I believe other parts of the stack should be ready. > > The second patch removes a useless write into listener socket > in tcp_rcv_state_process(), incurring false sharing in > tcp_conn_request() > > Performance under SYNFLOOD goes from 3.2 Mpps to 6 Mpps. Geese, you almost make it look too easy.... > Test was using a single TCP listener, on a host with 8 RX queues > on the NIC, and 24 cores (48 ht) Looks good, series applied, thanks Eric.