From owner-freebsd-performance@FreeBSD.ORG Thu Dec 28 15:12:02 2006 Return-Path: X-Original-To: freebsd-performance@FreeBSD.org Delivered-To: freebsd-performance@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3A07E16A416 for ; Thu, 28 Dec 2006 15:12:02 +0000 (UTC) (envelope-from steve@localhost.lu) Received: from linion.ion.lu (linion.ion.lu [80.90.47.168]) by mx1.freebsd.org (Postfix) with ESMTP id 8211B13C475 for ; Thu, 28 Dec 2006 15:12:01 +0000 (UTC) (envelope-from steve@localhost.lu) Received: (qmail 5438 invoked by uid 89); 28 Dec 2006 15:58:54 +0100 Received: from localhost (HELO ?127.0.0.1?) (steve@localhost.lu@127.0.0.1) by linion.ion.lu with SMTP; 28 Dec 2006 15:58:54 +0100 Message-ID: <4593DB6A.7030208@localhost.lu> Date: Thu, 28 Dec 2006 15:57:46 +0100 From: Steve Clement User-Agent: Thunderbird 1.5.0.9 (X11/20061222) MIME-Version: 1.0 To: freebsd-hackers@FreeBSD.org, freebsd-performance@FreeBSD.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Thu, 28 Dec 2006 16:54:13 +0000 Cc: sos@FreeBSD.org Subject: ICH7 IO Performance Issues X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Dec 2006 15:12:02 -0000 Hi list, I recently bought a New Asus W5F - 12" Laptop and am experiencing some issues with: If "Heavy" disk access occurs I experience overall system hangs Say I just compiled OpenOffice.Org and am happy all is fine so I can do a make clean. Make clean generates quite a lot of disk IO and everything begins lagging like: ls or playing an MP3 file. So I tried to reproduce this by doing the following: cat /dev/random > /tmp/junk_file didn't have the same effect, but I think that's because the source was not the local disk but fast memory a cp of a big file (1GB) didn't do anything BUT an rsync of that very same big file did give me hangs in my music at least so I catted big file attached it to now even bigger file and had some trouble too. The more I spawned IO Processes the badder it got. Is that a known issue? With 1.5Gb Ram there is for sure no way I ran out of Ram or any other memory issue (3Gig Swap) Also whilst rsyncing locally from disc to disc I noticed only between 10MB/s - 15MB/s throughput on average it did spike on 24MB during a few seconds. I seem to notice this issue quite often on FreeBSD, I had major RAID performance problems with a Rocket Raid adapter (ok I know it ain't the best but for what it's worth it should be more or less stable) Are there disk I/O issues on a larger scale maybe? Sincerely yours and willing to test/help, Steve Clement