From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: unstable 10GBE performance with recent kernels (> 3.0.X) Date: Mon, 18 Jun 2012 15:07:53 +0200 Message-ID: <4FDF2829.6050705@profihost.ag> References: <4FDEF34C.808@profihost.ag> <1340012706.7491.770.camel@edumazet-glaptop> <4FDEFD55.7010204@profihost.ag> <1340015143.7491.855.camel@edumazet-glaptop> <4FDF20B2.2010603@profihost.ag> <1340023876.7491.1153.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Linux Netdev List To: Eric Dumazet Return-path: Received: from mail.profihost.ag ([85.158.179.208]:51521 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750828Ab2FRNHz (ORCPT ); Mon, 18 Jun 2012 09:07:55 -0400 In-Reply-To: <1340023876.7491.1153.camel@edumazet-glaptop> Sender: netdev-owner@vger.kernel.org List-ID: Am 18.06.2012 14:51, schrieb Eric Dumazet: > On Mon, 2012-06-18 at 14:36 +0200, Stefan Priebe - Profihost AG wrote: >> Am 18.06.2012 12:25, schrieb Eric Dumazet: >>> I would remove all this (pretty old and obsolete) stuff and use standard >>> params. >> OK, thanks. done. >> >> I've one RHEL6 system (using default 2.6.32 kernel) where only using >> "ntuple on" results in just 4-5Gbit/s while the others using 3.5.0-rc2 >> are working fine. >> > > OK, then you might play with affinities, that's the only thing that > might need sysadmin tuning (irqbalance needs to be disabled) I've now used this one: # script provided by intel /root/set_irq_affinity.sh eth2 ifconfig eth2 mtu 9000 ethtool -K eth2 ntuple on irqbalance is off But with the latest long term stable vanilla kernel 3.0.34. # iperf -c HOST -t 60 works fine but with -d for using both directions i see around 9.8Gbit/s in one direction and only 300kb/s in the other direction. Stefan