From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: pre-fetching skb for delayed send Date: Fri, 06 Jul 2012 16:10:40 -0700 Message-ID: <4FF77070.7040705@candelatech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: netdev Return-path: Received: from mail.candelatech.com ([208.74.158.172]:38513 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756185Ab2GFXKl (ORCPT ); Fri, 6 Jul 2012 19:10:41 -0400 Received: from [192.168.100.111] (firewall.candelatech.com [70.89.124.249]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id q66NAecG012370 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 6 Jul 2012 16:10:40 -0700 Sender: netdev-owner@vger.kernel.org List-ID: Suppose one has a bridge-like thing that may store up packets for a bit (100+ms) before sending them.... We notice that performance is very good if we can run with (near) zero delay, but at higher delay, performance goes down significantly when attempting 10G speeds. I assume this is because we are sending skbs that are no longer in the cache... So, is there an easy way to pre-fetch an skb and it's related pages? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com