From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 10 May 2001 09:38:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 10 May 2001 09:38:14 -0400 Received: from mg03.austin.ibm.com ([192.35.232.20]:12426 "EHLO mg03.austin.ibm.com") by vger.kernel.org with ESMTP id ; Thu, 10 May 2001 09:38:04 -0400 Message-ID: <3AFA99C5.1920AA2D@austin.ibm.com> Date: Thu, 10 May 2001 08:38:13 -0500 From: "Andrew M. Theurer" X-Mailer: Mozilla 4.76 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: Bruce Allan CC: lse-tech@lists.sourceforge.net, linux-kernel@vger.kernel.org, samba-technical@samba.org Subject: Re: Linux 2.4 Scalability, Samba, and Netbench In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Bruce Allan wrote: > > Andrew Theurer wrote: > > I do have kernprof ACG and lockmeter for a 4P run. We saw no > > significant problems with lockmeter. csum_partial_copy_generic was the > > highest % in profile, at 4.34%. I'll see if we can get some space on > > http://lse.sourceforge.net to post the test data. > > The Netfinity system that you are using has two different supported GigE > adapters. I assume you are using one of these types - Netfinity Gigabit > Ethernet Adapter (19K4401) and the Netfinity Gigabit Ethernet SX Server > Adapter (06P3701); using the acenic.c and e1000.c drivers, respectively. > >From what I understand after initial perusal of the two drivers, the former > has receive checksumming support on the adapter itself while the latter, > the one you are using, does not support hardware checksumming (at least, it > is not enabled by the driver). Bruce, According to Intel's driver for Pro/1000, it supports checksum on Rx via module option "XsunRX=1". I have not tried this yet because we are waiting on our Gbps switch hardware. > Are you able to re-run your tests with GigE adapters that support > checksumming on the hardware instead of doing it in the kernel? If not, I > will be running similar tests in a very similar configuration (with the > 19K4401 adapters) in the near future and can share results if you'd like. Yes, hopefully we will be running the new setup (64 clients, many Gbps adapters) in about 2-3 weeks. At that point I'd like to get some results for 8-way as well. It would definitely be a good idea to compare results. Andrew Theurer