From mboxrd@z Thu Jan 1 00:00:00 1970 From: Changli Gao Subject: Re: [PATCH net-next-2.6] net: speedup udp receive path Date: Thu, 29 Apr 2010 20:12:27 +0800 Message-ID: References: <1272010378-2955-1-git-send-email-xiaosuo@gmail.com> <20100427.150817.84390202.davem@davemloft.net> <1272406693.2343.26.camel@edumazet-laptop> <1272454432.14068.4.camel@bigi> <1272458001.2267.0.camel@edumazet-laptop> <1272458174.14068.16.camel@bigi> <1272463605.2267.70.camel@edumazet-laptop> <1272498293.4258.121.camel@bigi> <1272514176.2201.85.camel@edumazet-laptop> <1272540952.4258.161.camel@bigi> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Eric Dumazet , David Miller , therbert@google.com, shemminger@vyatta.com, netdev@vger.kernel.org, Eilon Greenstein , Brian Bloniarz To: hadi@cyberus.ca Return-path: Received: from mail-pw0-f46.google.com ([209.85.160.46]:60087 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758753Ab0D3Rab convert rfc822-to-8bit (ORCPT ); Fri, 30 Apr 2010 13:30:31 -0400 Received: by pwj9 with SMTP id 9so283408pwj.19 for ; Fri, 30 Apr 2010 10:30:30 -0700 (PDT) In-Reply-To: <1272540952.4258.161.camel@bigi> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, Apr 29, 2010 at 7:35 PM, jamal wrote: > > Same here - even in my worst case scenario 88.5% of 750Kpps > 600Kpps= =2E > Attached is history results to make more sense of what i am saying: > we have net-next kernels from apr14, apr23, apr23 with changlis chang= e, > apr28, apr28 with your change. What you'll see is non-rps (blue) gets > better and rps (Orange) gets better slowly then by apr28 it is worse. Did the number of IPIs increase in the apr28 test? The finial patch with Eric's change may introduce more IPIs. And I am wondering why 23rdcl-non-rps is better than before. Maybe it is the side effect of my patch: enlarge the netdev_max_backlog. --=20 Regards=EF=BC=8C Changli Gao(xiaosuo@gmail.com)