Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 15 Mar 2003 01:10:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 15 Mar 2003 01:10:05 -0500 Received: from holomorphy.com ([66.224.33.161]:30672 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Sat, 15 Mar 2003 01:09:59 -0500 Date: Fri, 14 Mar 2003 22:20:25 -0800 From: William Lee Irwin III To: Andrew Morton , bzzz@tmi.comex.ru, adilger@clusterfs.com, linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net Subject: Re: [PATCH] concurrent block allocation for ext2 against 2.5.64 Message-ID: <20030315062025.GP20188@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Andrew Morton , bzzz@tmi.comex.ru, adilger@clusterfs.com, linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net References: <20030313015840.1df1593c.akpm@digeo.com> <20030313165641.H12806@schatzie.adilger.int> <20030315043744.GM1399@holomorphy.com> <20030314205455.49f834c2.akpm@digeo.com> <20030315054910.GN20188@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030315054910.GN20188@holomorphy.com> User-Agent: Mutt/1.3.28i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 27169 Lines: 355 On Fri, Mar 14, 2003 at 08:54:55PM -0800, Andrew Morton wrote: > > `dbench 512' will presumably do lots of IO and spend significant > > time in I/O wait. You should see the effects of this change more > > if you use fewer clients (say, 32) so it doesn't hit disk. > On Fri, Mar 14, 2003 at 09:49:10PM -0800, William Lee Irwin III wrote: > Throughput 226.57 MB/sec 32 procs > dbench 32 2>& 1 25.04s user 515.02s system 1069% cpu 50.516 total It's too light a load... here's dbench 128. Looks like dbench doesn't scale. It needs to learn how to spread itself across disks if it's not to saturate a device queue while at the same time generating enough cpu load to saturate cpus. Is there a better (publicable/open/whatever) benchmark? dbench 128: Throughput 161.237 MB/sec 128 procs dbench 128 2>& 1 143.85s user 3311.10s system 1219% cpu 4:43.27 total vma samples %-age symbol name c0106ff4 9134179 33.7261 default_idle c01dc3b0 5570229 20.5669 __copy_to_user_ll c01dc418 1773600 6.54865 __copy_from_user_ll c0119058 731524 2.701 try_to_wake_up c0108140 686952 2.53643 .text.lock.semaphore c011a1bc 489415 1.80706 schedule c0119dac 485196 1.79149 scheduler_tick c011fadc 448048 1.65433 profile_hook c0119860 356065 1.3147 load_balance c0107d0c 267333 0.987072 __down c011c4ff 249627 0.921696 .text.lock.sched c0152ab0 223897 0.826694 __find_get_block_slow c01dc510 222598 0.821897 atomic_dec_and_lock c0168aac 218153 0.805485 d_lookup c013ece4 194326 0.717509 check_highmem_ptes c015f3dc 193112 0.713026 path_lookup c01522a0 187115 0.690884 file_move c010f6b8 166809 0.615908 timer_interrupt procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b 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22976 0 0 44 0 1132 142 0 0 88 12 0 0 0 48288288 567552 22976 0 0 0 180 1061 23 0 0 100 0 1 0 0 48288288 567552 22976 0 0 0 0 1026 21 0 0 100 0 0 0 0 48288096 567552 22976 0 0 0 0 1027 43 0 0 100 0 - 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/