From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 27 May 2001 19:31:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 27 May 2001 19:31:29 -0400 Received: from f00f.stub.clear.net.nz ([203.167.224.51]:49156 "HELO metastasis.f00f.org") by vger.kernel.org with SMTP id ; Sun, 27 May 2001 19:31:21 -0400 Date: Mon, 28 May 2001 11:31:16 +1200 From: Chris Wedgwood To: Jaswinder Singh Cc: stepken@little-idiot.de, linux-kernel@vger.kernel.org Subject: Re: IDE Performance lack ! Message-ID: <20010528113116.A4895@metastasis.f00f.org> In-Reply-To: <01052622193100.01317@linux.zuhause.de> <00a101c0e642$4f0791a0$52a6b3d0@Toshiba> <20010527224045.B3556@metastasis.f00f.org> <00c701c0e6d8$2b28ea40$4aa6b3d0@Toshiba> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <00c701c0e6d8$2b28ea40$4aa6b3d0@Toshiba>; from jaswinder.singh@3disystems.com on Sun, May 27, 2001 at 11:09:25AM -0700 X-No-Archive: Yes Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, May 27, 2001 at 11:09:25AM -0700, Jaswinder Singh wrote: But my problem is why linux boxes do not response for few seconds (sometimes) and especially during telnet/ssh it looks more worst and looks similar to Microsoft Windows :( there is problem in scheduling or what ? Sounds like IO starvation, if your reading from one partition to the other, it's going to suck for IO --- the head will be going nuts. Also, 2.2.x has a single IO queue for writes (doesn't it?), so that won't help. What if you dd a file from one partition to another, is the problem lesser with larger buffers, say 64M or so? What about dd from /dev/zero to a partition, so you get heavy writes, does this also suck? --cw