From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: [PATCH v3 1/6] net: pad skb data and shinfo as a whole rather than individually Date: Wed, 1 Feb 2012 10:09:49 +0000 Message-ID: <1328090989.17444.31.camel@zakaz.uk.xensource.com> References: <1327494389.24561.316.camel@zakaz.uk.xensource.com> <1327494434-21566-1-git-send-email-ian.campbell@citrix.com> <1327495879.2425.29.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1327496953.24561.323.camel@zakaz.uk.xensource.com> <1327497157.2425.34.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1328020528.26983.396.camel@zakaz.uk.xensource.com> <1328021140.2297.10.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <1328089187.17444.10.camel@zakaz.uk.xensource.com> <1328090522.2595.15.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: "netdev@vger.kernel.org" , "David S. Miller" To: Eric Dumazet Return-path: Received: from smtp.ctxuk.citrix.com ([62.200.22.115]:3535 "EHLO SMTP.EU.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753819Ab2BAKJv (ORCPT ); Wed, 1 Feb 2012 05:09:51 -0500 In-Reply-To: <1328090522.2595.15.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, 2012-02-01 at 10:02 +0000, Eric Dumazet wrote: > Le mercredi 01 f=C3=A9vrier 2012 =C3=A0 09:39 +0000, Ian Campbell a =C3= =A9crit : >=20 > > I'll investigate the sending side. The sender is running a 2.6.32 d= istro > > kernel. Maybe I need to tweak it somewhat. >=20 > Thats strange, even a very old kernel is able to sustain Gigabit line > rate with pktgen. Maybe a problem with a switch and ethernet pauses ? Tanks, that was something I was going to investigate. These machines ar= e in our lab so I need to figure out if they are even directly attached t= o the same switch etc. Ian.