From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262577AbTFXWZg (ORCPT ); Tue, 24 Jun 2003 18:25:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263310AbTFXWZf (ORCPT ); Tue, 24 Jun 2003 18:25:35 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.105]:23801 "EHLO e5.ny.us.ibm.com") by vger.kernel.org with ESMTP id S262577AbTFXWZU (ORCPT ); Tue, 24 Jun 2003 18:25:20 -0400 Date: Tue, 24 Jun 2003 15:28:04 -0700 From: "Martin J. Bligh" To: linux-kernel Subject: [Bug 849] New: [perf][tiobench] tiobench sequential write degrades in 2.5.72-bk2 Message-ID: <194570000.1056493684@flay> X-Mailer: Mulberry/2.1.2 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org http://bugme.osdl.org/show_bug.cgi?id=849 Summary: [perf][tiobench] tiobench sequential write degrades in 2.5.72-bk2 Kernel Version: 2.5.72-bk2 Status: NEW Severity: high Owner: akpm@digeo.com Submitter: slpratt@us.ibm.com Hardware Environment: 8way 900mhz adaptec scsi drives Software Environment: sles8.0 + 2.5 kernel Problem Description: tiobench sequential write throughput drops between 2.5.72-bk1 and 2.5.72-bk2 for multi threaded IO. tolerance = 1.00 + 5.00% of 2.5.72-bk1 2.5.72-bk1 2.5.72-bk2 Theads MBs/sec MBs/sec %diff diff tolerance ---------- ------------ ------------ -------- ------------ ------------ 1 43.27 42.90 -0.86 -0.37 3.16 16 11.86 4.35 -63.32 -7.51 1.59 * 64 3.95 2.50 -36.71 -1.45 1.20 * Results:Sequential Write CPU (Graph) tolerance = 1.00 + 3.00% of 2.5.72-bk1 2.5.72-bk1 2.5.72-bk2 Theads %CPU %CPU %diff diff tolerance ---------- ------------ ------------ -------- ------------ ------------ 1 52.87% 50.78% -3.95 -2.09 2.59 16 127.6% 49.03% -61.58 -78.57 4.83 * 64 37.51% 22.15% -40.95 -15.36 2.13 * http://ltcperf.ncsa.uiuc.edu/data/2.5.72-bk2/2.5.72-bk1-vs-2.5.72-bk2/ Folloow link for tiobench.ext3 summary report and full results. Steps to reproduce: tiobench --dir /mnt/tmp --block 4096 --size 600 --numruns 10 --threads 16