Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760235AbXKUIrV (ORCPT ); Wed, 21 Nov 2007 03:47:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752957AbXKUIrF (ORCPT ); Wed, 21 Nov 2007 03:47:05 -0500 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:49964 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754796AbXKUIrE (ORCPT ); Wed, 21 Nov 2007 03:47:04 -0500 Date: Wed, 21 Nov 2007 17:49:48 +0900 From: KAMEZAWA Hiroyuki To: KAMEZAWA Hiroyuki Cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: 2.6.24-rc3-mm1 (sync is slow ?) Message-Id: <20071121174948.2269d02f.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20071121174215.caff4551.kamezawa.hiroyu@jp.fujitsu.com> References: <20071120204525.ff27ac98.akpm@linux-foundation.org> <20071121174215.caff4551.kamezawa.hiroyu@jp.fujitsu.com> Organization: Fujitsu X-Mailer: Sylpheed 2.4.2 (GTK+ 2.10.11; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 851 Lines: 29 On Wed, 21 Nov 2007 17:42:15 +0900 KAMEZAWA Hiroyuki wrote: > Hi, Andrew > > I got following result in 'sync' command. > It was too slow. (memory controller config is off ;) > I attaches my .config. > == > [2.6.24-rc3-mm1] > [kamezawa@dr-test2 ~]$ dd if=/dev/zero of=./tmpfile bs=4096 count=100000 > 100000+0 records in > 100000+0 records out > 409600000 bytes (410 MB) copied, 1.46706 seconds, 279 MB/s > [kamezawa@dr-test2 ~]$ time sync > > real 3m6.440s > user 0m0.000s > sys 0m0.133s > Ah, one of cpu shows 100% iowait in 'top' command while this. -Kame - 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/