From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e33.co.us.ibm.com (8.12.10/8.12.9) with ESMTP id j5MGNQ1N554654 for ; Wed, 22 Jun 2005 12:23:26 -0400 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay04.boulder.ibm.com (8.12.10/NCO/VER6.6) with ESMTP id j5MGNP8X181432 for ; Wed, 22 Jun 2005 10:23:25 -0600 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11/8.13.3) with ESMTP id j5MGNPa6019239 for ; Wed, 22 Jun 2005 10:23:25 -0600 Subject: Re: 2.6.12-mm1 & 2K lun testing (JFS problem ?) From: Badari Pulavarty In-Reply-To: <20050622014121.GB10690@holomorphy.com> References: <1118856977.4301.406.camel@dyn9047017072.beaverton.ibm.com> <20050616002451.01f7e9ed.akpm@osdl.org> <1118951458.4301.478.camel@dyn9047017072.beaverton.ibm.com> <20050616133730.1924fca3.akpm@osdl.org> <1118965381.4301.488.camel@dyn9047017072.beaverton.ibm.com> <20050616175130.22572451.akpm@osdl.org> <42B2E7D2.9080705@us.ibm.com> <20050617141331.078e5f8f.akpm@osdl.org> <1119400494.4620.33.camel@dyn9047017102.beaverton.ibm.com> <20050622014121.GB10690@holomorphy.com> Content-Type: text/plain Date: Wed, 22 Jun 2005 09:23:23 -0700 Message-Id: <1119457404.11299.8.camel@dyn9047017102.beaverton.ibm.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: William Lee Irwin III Cc: Andrew Morton , shaggy@us.ibm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: Hi Wli, Okay. Let me go through all the tests one more time with collecting data. I will compare raw vs filesystem writes with dirty ratio tuning. I will provide vmstat, slabinfo, meminfo, profile data for each of those. You need anything else ? BTW, I will send the data offline. I don't want to polute the list with megabytes of data. Thanks, Badari On Tue, 2005-06-21 at 18:41 -0700, William Lee Irwin III wrote: > On Tue, Jun 21, 2005 at 05:34:54PM -0700, Badari Pulavarty wrote: > > Hi Andrew & Shaggy, > > Here is the summary of 2K lun testing on 2.6.12-mm1. > > When I tune dirty ratios and CFQ queue depths, things > > seems to be running fine. > > echo 20 > /proc/sys/vm/dirty_ratio > > echo 20 > /proc/sys/vm/overcommit_ratio > > echo 4 > /sys/block//queue/nr_requests > > But, I am running into JFS problem. I can't kill my > > "dd" process. They all get stuck in: > > (I am going to try ext3). > > If you could get unabridged profiling data for raw vs. fs (so it can > be properly sorted) I would be interested in that. Early indications > were large amounts of time spent in shrink_zone(), obtained by > re-sorting the truncated profile listings. It indicated the time spent > in shrink_zone() was 26.3 times as much time spent in default_idle(). > Typically copying to and from userspace are enormous overheads, but > aren't observable in the truncated/mis-sorted profiles, which calls > them into question, barring unreported usage of O_DIRECT. There are > also no totals reported, which are helpful for interpreting realtime > behavior. > > > -- wli > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: aart@kvack.org > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org