From: Solofo.Ramangalahy@bull.net Subject: Re: jbd/jbd2 performance improvements Date: Thu, 16 Oct 2008 08:04:19 +0200 Message-ID: <18678.55651.556822.187508@frecb006361.adech.frec.bull.fr> References: <48F62893.9060606@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: "Theodore Ts'o" , linux-ext4@vger.kernel.org, Eric Sandeen To: Ric Wheeler Return-path: Received: from ecfrec.frec.bull.fr ([129.183.4.8]:59463 "EHLO ecfrec.frec.bull.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752046AbYJPGHu (ORCPT ); Thu, 16 Oct 2008 02:07:50 -0400 In-Reply-To: <48F62893.9060606@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: Hi Ric, >>>>> On Wed, 15 Oct 2008 13:29:55 -0400, Ric Wheeler said: Ric> We are going to try and poke at this - do you suspect a single or Ric> multi-threaded test would work best? I've performed some tests: http://www.bullopensource.org/ext4/20081013-2.6.27-rc9-ext4-1-akpm-fix-run6/ http://www.bullopensource.org/ext4/20081013-2.6.27-rc9-ext4-1-akpm-fix-run6/results_sorted.txt.html I now realize that the results may not be valid since I used kvm, but they do show variation wrt. the number of threads. So you may want to test both single and multi-threaded. -- solofo