From mboxrd@z Thu Jan 1 00:00:00 1970 From: Junchang Wang Subject: Re: [PATCH 1/3] Kernel interfaces for multiqueue aware socket Date: Thu, 16 Dec 2010 09:52:28 +0800 Message-ID: References: <46a08278c2ba21737528eb4b77391a7e8bc88000.1292405004.git.fenghua.yu@intel.com> <1292446118.2603.11.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: Fenghua Yu , "David S. Miller" , John Fastabend , Xinan Tang , netdev , linux-kernel To: Eric Dumazet Return-path: Received: from mail-fx0-f43.google.com ([209.85.161.43]:60950 "EHLO mail-fx0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754161Ab0LPBw3 (ORCPT ); Wed, 15 Dec 2010 20:52:29 -0500 In-Reply-To: <1292446118.2603.11.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, Dec 16, 2010 at 4:48 AM, Eric Dumazet wrote: >> With this patch, the user-space receiving speed on a Intel SR1690 server with >> a single L5640 6-core processor and a single ixgbe-based NIC goes from 0.73Mpps >> to 4.20Mpps, nearly a linear speedup. A Intel SR1625 server two E5530 4-core >> processors and a single ixgbe-based NIC goes from 0.80Mpps to 4.6Mpps. We noticed >> the performance penalty comes from NUMA memory allocation. >> > > ??? please elaborate on these NUMA memory allocations. This should be OK > after commit 564824b0c52c34692d (net: allocate skbs on local node) > Hi Eric, Commit 564824b0c52c34692d had been used in the experiments, but the problem remained unsolved. SLUB was used, and both servers were equipped with 8G physical memory. Is there any additional information I can provide? Thanks. -- --Junchang