From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965351AbXATT4Y (ORCPT ); Sat, 20 Jan 2007 14:56:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965359AbXATT4Y (ORCPT ); Sat, 20 Jan 2007 14:56:24 -0500 Received: from smtpout10-04.prod.mesa1.secureserver.net ([64.202.165.238]:55587 "HELO smtpout10-04.prod.mesa1.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S965351AbXATT4X (ORCPT ); Sat, 20 Jan 2007 14:56:23 -0500 Message-ID: <45B273E4.8040302@seclark.us> Date: Sat, 20 Jan 2007 14:56:20 -0500 From: Stephen Clark Reply-To: Stephen.Clark@seclark.us User-Agent: Mozilla/5.0 (X11; U; Linux 2.2.16-22smp i686; en-US; m18) Gecko/20010110 Netscape6/6.5 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Sunil Naidu CC: Willy Tarreau , =?ISO-8859-1?Q?Ismail_D=F6nmez?= , linux-kernel@vger.kernel.org Subject: Re: Abysmal disk performance, how to debug? References: <200701201920.54620.ismail@pardus.org.tr> <20070120174503.GZ24090@1wt.eu> <200701201952.54714.ismail@pardus.org.tr> <20070120180344.GA23841@1wt.eu> <8355959a0701201144x290362d8ja6cd5bc1408475da@mail.gmail.com> In-Reply-To: <8355959a0701201144x290362d8ja6cd5bc1408475da@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Sunil Naidu wrote: >On 1/20/07, Willy Tarreau wrote: > > >>It is not expected to increase write performance, but it should help >>you do something else during that time, or also give more responsiveness >>to Ctrl-C. It is possible that you have fast and slow RAM, or that your >>video card uses shared memory which slows down some parts of memory >>which are not used anymore with those parameters. >> >> > >I did test some SATA drives, am getting these value for 2.6.20-rc5:- > >[sukhoi@Typhoon ~]$ time dd if=/dev/zero of=/tmp/1GB bs=1M count=1024 >1024+0 records in >1024+0 records out >1073741824 bytes (1.1 GB) copied, 21.0962 seconds, 50.9 MB/s > >What can you suggest here w.r.t my RAM & disk? > > > >>Willy >> >> > >Thanks, > >~Akula2 >- >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/ > > > Hi, whitebook vbi s96f core 2 duo t5600 2gb hitachi ATA HTS721060G9AT00 using libata time dd if=/dev/zero of=/tmp/1GB bs=1M count=1024 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 10.0092 seconds, 107 MB/s real 0m10.196s user 0m0.004s sys 0m3.440s -- "They that give up essential liberty to obtain temporary safety, deserve neither liberty nor safety." (Ben Franklin) "The course of history shows that as a government grows, liberty decreases." (Thomas Jefferson)