From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Bligh Subject: Re: Scalability of interface creation and deletion Date: Sun, 08 May 2011 14:14:35 +0100 Message-ID: <874CAEA33BC0278D3E85DFBB@nimrod.local> References: <891B02256A0667292521A4BF@Ximines.local> <1304770926.2821.1157.camel@edumazet-laptop> <0F4A638C2A523577CDBC295E@Ximines.local> <1304785589.3207.5.camel@edumazet-laptop> <178E8895FB84C07251538EF7@Ximines.local> <1304793174.3207.22.camel@edumazet-laptop> <1304793749.3207.26.camel@edumazet-laptop> <1304838742.3207.45.camel@edumazet-laptop> <20110508124428.GJ2641@linux.vnet.ibm.com> <6A6F17150A046D2D2670724D@nimrod.local> Reply-To: Alex Bligh Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , netdev@vger.kernel.org, Alex Bligh To: Alex Bligh , paulmck@linux.vnet.ibm.com Return-path: Received: from mail.avalus.com ([89.16.176.221]:56166 "EHLO mail.avalus.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753340Ab1EHNOj (ORCPT ); Sun, 8 May 2011 09:14:39 -0400 In-Reply-To: <6A6F17150A046D2D2670724D@nimrod.local> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: --On 8 May 2011 14:06:07 +0100 Alex Bligh wrote: > Add to that the fact that there are 2 x synchronize_sched() and one > rcu_barrier() per interface removal. If I ignore your IRQ idea, that's > 6 x 3 = 18ms per interface removal at CONFIG_HZ=10, 180ms at > CONFIG_HZ=100. Aargh I mean: 6 x 3 = 18ms per interface removal at CONFIG_HZ=1000, 180ms at CONFIG_HZ=100. -- Alex Bligh