From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [PATCH] iptables: lock free counters Date: Fri, 20 Feb 2009 16:35:29 -0800 Message-ID: <499F4C51.7010302@hp.com> References: <20090218051906.174295181@vyatta.com> <20090218052747.321329022@vyatta.com> <20090219114719.560999b5@extreme> <499DEF49.3040602@cosmosbay.com> <499DF1A2.1030405@hp.com> <20090219170318.3f7d54f2@extreme> <499E04C9.4020308@hp.com> <499E7B03.9090409@trash.net> <499F3551.5@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Stephen Hemminger , Eric Dumazet , David Miller , netdev@vger.kernel.org, netfilter-devel@vger.kernel.org To: Patrick McHardy Return-path: Received: from g1t0027.austin.hp.com ([15.216.28.34]:21959 "EHLO g1t0027.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753402AbZBUAff (ORCPT ); Fri, 20 Feb 2009 19:35:35 -0500 In-Reply-To: <499F3551.5@hp.com> Sender: netfilter-devel-owner@vger.kernel.org List-ID: Rick Jones wrote: > So, by the time this hits inboxes, under: > > ftp://ftp.netperf.org/nf-next-2.6-results > ... > I will go back through my email now and try to find the conntrack lock > changes and apply them to the tree and turn the crank. Under the base URL above there is now a "conntrack" subdir with the usual "none," "empty," and "full" subdirs. This is with the patch from message ID <20090219140303.4329f860@extreme> titled "Re: [RFT 4/4] netfilter: Get rid of central rwlock in tcp conntracking" which my mail client says has a date of 02/19/09 14:03. On the plus side, only one of the 64 concurrent netperfs died during the "full" test compared with more than 10 without the patch. Also, there were no soft lockups reported as there were without the patch. The rwlock time is gone, naturally, replaced with boatloads of spinlock contention. Hopefully the scgprof profile will help show the source. Perhaps there is yet another patch I should have applied :) happy benchmarking, rick jones