From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thanos Chatziathanassiou Subject: Performance Difference based on .... ? Date: Mon, 12 Jul 2004 20:37:08 +0300 Sender: nfs-admin@lists.sourceforge.net Message-ID: <40F2CC44.7080104@arx.gr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1Bk4kZ-0001ZY-U1 for nfs@lists.sourceforge.net; Mon, 12 Jul 2004 10:37:59 -0700 Received: from dev.arx.gr ([212.205.86.237] helo=www4.arx.gr) by sc8-sf-mx1.sourceforge.net with esmtp (Exim 4.34) id 1Bk4kY-0004am-QM for nfs@lists.sourceforge.net; Mon, 12 Jul 2004 10:37:59 -0700 Received: from arx.gr (skevos.arx.gr [212.205.86.238] (may be forged)) by www4.arx.gr (8.9.3p3/8.9.3) with ESMTP id UAA05431 for ; Mon, 12 Jul 2004 20:37:08 +0300 To: nfs@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: Hello list, I have come to a dead-end... How come on a freshly mounted file-system, compiling takes considerably less time than on subsequent runs ? I mean, this snip of shell: ---snip--- for i in 1 2 3 do time ./apachectl configtest done ---snip--- 2:17.23 on the first run, while it takes 3:21.92 on the second and 3:20.78 on the third run. The network is 1gb ethernet, with jumbo frames 9000 and tests were run both on 4096 and 8192 rsize/wsize with more or less similar results. Client is 2x AthlonMP 1800+, server is 2x AthlonMP 2200+, kernel on both is 2.4.26+Trond's linux-2.4.26.NFS.ALL patch, mount is udp - essentially so, because this is meant to be a high availability setup. The only real limitation is the rate at which the server can feed data to the client, since cpu is 31% on the first and 20% on the second and third runs. Any ideas ? Any other info I can give that might help ? Regards, Thanos Chatziathanassiou ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs