Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 27 Feb 2002 13:35:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 27 Feb 2002 13:35:15 -0500 Received: from e21.nc.us.ibm.com ([32.97.136.227]:55774 "EHLO e21.nc.us.ibm.com") by vger.kernel.org with ESMTP id ; Wed, 27 Feb 2002 13:34:47 -0500 Date: Wed, 27 Feb 2002 10:34:36 -0800 From: "Martin J. Bligh" To: Hanna Linder , linux-kernel@vger.kernel.org cc: lse-tech@lists.sourceforge.net, viro@math.psu.edu Subject: Re: [Lse-tech] lockmeter results comparing 2.4.17, 2.5.3, and 2.5.5 Message-ID: <67850000.1014834875@flay> In-Reply-To: <10460000.1014833979@w-hlinder.des> In-Reply-To: <10460000.1014833979@w-hlinder.des> X-Mailer: Mulberry/2.1.2 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > 2.5.5: > > 8.6% 1.6us( 100ms) 30us( 86ms)( 9.4%) 783373441 91.4% 8.6% 0.00% *TOTAL* Whilst it's great to see BKL contention going down, this: 0.16% 0.25% 0.7us( 100ms) 252us( 86ms)(0.02%) 6077746 99.8% 0.25% 0% inode_lock 0.03% 0.11% 0.6us( 55us) 2.1us( 9.9us)(0.00%) 1322338 99.9% 0.11% 0% __mark_inode_dirty+0x48 0.00% 0% 0.7us( 5.9us) 0us 391 100% 0% 0% get_new_inode+0x28 0.00% 0.22% 2.5us( 50us) 495us( 28ms)(0.00%) 50397 99.8% 0.22% 0% iget4+0x3c 0.03% 0.28% 0.6us( 26us) 30us( 58ms)(0.00%) 1322080 99.7% 0.28% 0% insert_inode_hash+0x44 0.04% 0.29% 0.5us( 39us) 332us( 86ms)(0.01%) 2059365 99.7% 0.29% 0% iput+0x68 0.03% 0.30% 0.7us( 57us) 422us( 77ms)(0.01%) 1323036 99.7% 0.30% 0% new_inode+0x1c 0.03% 8.3% 63ms( 100ms) 3.8us( 3.8us)(0.00%) 12 91.7% 8.3% 0% prune_icache+0x1c 0.00% 0% 1.0us( 5.2us) 0us 34 100% 0% 0% sync_unlocked_inodes+0x10 0.00% 0% 1.0us( 2.4us) 0us 93 100% 0% 0% sync_unlocked_inodes+0x110 looks a little distressing - the hold times on inode_lock by prune_icache look bad in terms of latency (contention is still low, but people are still waiting on it for a very long time). Is this a transient thing, or do people think this is going to be a problem? Martin. - 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/