From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s Date: Wed, 20 Nov 2013 09:40:22 -0800 Message-ID: <1384969222.10637.20.camel@edumazet-glaptop2.roam.corp.google.com> References: <87y54u59zq.fsf@natisbad.org> <20131112083633.GB10318@1wt.eu> <87a9hagex1.fsf@natisbad.org> <20131112100126.GB23981@1wt.eu> <87vbzxd473.fsf@natisbad.org> <20131113072257.GB10591@1wt.eu> <20131117141940.GA18569@1wt.eu> <1384710098.8604.58.camel@edumazet-glaptop2.roam.corp.google.com> <20131120171227.GG8581@1wt.eu> <20131120173436.GK8581@1wt.eu> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Thomas Petazzoni , netdev@vger.kernel.org, Arnaud Ebalard , edumazet@google.com, Cong Wang , linux-arm-kernel@lists.infradead.org To: Willy Tarreau Return-path: Received: from mail-pd0-f181.google.com ([209.85.192.181]:60711 "EHLO mail-pd0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753145Ab3KTRkY (ORCPT ); Wed, 20 Nov 2013 12:40:24 -0500 Received: by mail-pd0-f181.google.com with SMTP id p10so2292372pdj.12 for ; Wed, 20 Nov 2013 09:40:23 -0800 (PST) In-Reply-To: <20131120173436.GK8581@1wt.eu> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, 2013-11-20 at 18:34 +0100, Willy Tarreau wrote: > One important point, I was looking for the other patch you pointed > in this long thread and finally found it : > > > So > > http://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=98e09386c0ef4dfd48af7ba60ff908f0d525cdee > > > > restored this minimal amount of buffering, and let the bigger amount for > > 40Gb NICs ;) > > This one definitely restores original performance, so it's a much better > bet in my opinion :-) I don't understand. I thought you were using this patch. I guess we are spending time on a already solved problem.