From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751173AbWDMXA7 (ORCPT ); Thu, 13 Apr 2006 19:00:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751171AbWDMXA6 (ORCPT ); Thu, 13 Apr 2006 19:00:58 -0400 Received: from ns1.soleranetworks.com ([70.103.108.67]:47835 "EHLO master.soleranetworks.com") by vger.kernel.org with ESMTP id S1751173AbWDMXA6 (ORCPT ); Thu, 13 Apr 2006 19:00:58 -0400 Message-ID: <443EE3AF.7020604@wolfmountaingroup.com> Date: Thu, 13 Apr 2006 17:50:07 -0600 From: "Jeff V. Merkey" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040510 X-Accept-Language: en-us, en MIME-Version: 1.0 To: David Lang CC: "Martin J. Bligh" , K P , linux-kernel@vger.kernel.org Subject: Re: JVM performance on Linux (vs. Solaris/Windows) References: <62a080740604130753i4b8bbbckc3cba12092b54226@mail.gmail.com> <443E74C1.5090801@mbligh.org> <443EBC1D.1000307@wolfmountaingroup.com> In-Reply-To: Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org David Lang wrote: > On Thu, 13 Apr 2006, Jeff V. Merkey wrote: > >> Note they ran the benchmark on an Opteron 285 instead of a Xeon with >> 16 GB of memory. Opteron peformance currently **SUCKS** with 2.6 >> series kernels under any kind of heavy I/O due to their cloning of >> the ancient 82489DX architecture for I/O interrupt access and >> performance. Looks like the test was stakced against Linux from the >> start. Should have used a Xeon system. AMD needs to get their crappy >> I/O performance up to snuff. Looking at the test parameteres leads me >> to believe there was a lot of swapping on a system with already poor >> I/O performance. > > > Jeff, I've seen several reccomendations from databasefolks (postgres > and mysql) favoring Opterons over Xeons. this doesn't match your > statement that Opteron performance sucks under any kind of I/O load. I > don't understand how both can be correct. > > David Lang > Hi David, I have tested our Solera products on both Xeon and Opteron Processors. I can sustain 500 MB/S capture off the wire on 4 x 1000 Gigabit segments due to the incredible performance of Xeon based I/O chipsets. My tests with Opteron based systems are sick in comparison. An Opteron 200 series CPU on a Tyan based motherbord system is discouraging on comparison. The Opteron systems will only sustain 150 MB/S with the same software. The I/O chipset performance for disk and LAN I/O is purtrid compared to the 7500 series I/O chipsets. Jeff