From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267600AbUHMVey (ORCPT ); Fri, 13 Aug 2004 17:34:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267602AbUHMVey (ORCPT ); Fri, 13 Aug 2004 17:34:54 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:3233 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S267600AbUHMVeu (ORCPT ); Fri, 13 Aug 2004 17:34:50 -0400 Subject: Re: [patch] voluntary-preempt-2.6.8-rc4-O7 From: Lee Revell To: Ingo Molnar Cc: linux-kernel , Felipe Alfaro Solana , Florian Schmidt In-Reply-To: <20040813104817.GI8135@elte.hu> References: <20040726083537.GA24948@elte.hu> <1090832436.6936.105.camel@mindpipe> <20040726124059.GA14005@elte.hu> <20040726204720.GA26561@elte.hu> <20040729222657.GA10449@elte.hu> <20040801193043.GA20277@elte.hu> <20040809104649.GA13299@elte.hu> <20040810132654.GA28915@elte.hu> <20040812235116.GA27838@elte.hu> <1092382825.3450.19.camel@mindpipe> <20040813104817.GI8135@elte.hu> Content-Type: text/plain Message-Id: <1092432929.3450.78.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Fri, 13 Aug 2004 17:35:30 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2004-08-13 at 06:48, Ingo Molnar wrote: > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8-rc4-O7 > Here is the trace resulting from the apt-get filemap_sync() issue: preemption latency trace v1.0 ----------------------------- latency: 3656 us, entries: 4000 (8605) process: apt-get/21227, uid: 0 nice: 0, policy: 0, rt_priority: 0 =======> 0.000ms (+0.000ms): filemap_sync_pte_range (filemap_sync) 0.000ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.002ms (+0.001ms): set_page_dirty (filemap_sync_pte) 0.002ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 0.004ms (+0.001ms): radix_tree_tag_set (__set_page_dirty_buffers) 0.006ms (+0.001ms): __mark_inode_dirty (__set_page_dirty_buffers) 0.008ms (+0.001ms): filemap_sync_pte (filemap_sync_pte_range) 0.009ms (+0.000ms): set_page_dirty (filemap_sync_pte) 0.009ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 0.010ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_buffers) 0.011ms (+0.000ms): __mark_inode_dirty (__set_page_dirty_buffers) 0.011ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.012ms (+0.000ms): set_page_dirty (filemap_sync_pte) 0.012ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 0.013ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_buffers) 0.013ms (+0.000ms): __mark_inode_dirty (__set_page_dirty_buffers) 0.014ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.014ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.015ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.016ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.016ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.017ms (+0.000ms): set_page_dirty (filemap_sync_pte) 0.017ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 0.018ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_buffers) 0.019ms (+0.000ms): __mark_inode_dirty (__set_page_dirty_buffers) 0.019ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.019ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.020ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.020ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.021ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 0.022ms (+0.000ms): set_page_dirty (filemap_sync_pte) 0.022ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 0.023ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_buffers) 0.023ms (+0.000ms): __mark_inode_dirty (__set_page_dirty_buffers) [ zillons of these deleted ] 1.960ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 1.960ms (+0.000ms): set_page_dirty (filemap_sync_pte) 1.961ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 1.961ms (+0.000ms): preempt_schedule (__set_page_dirty_buffers) 1.961ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_buffers) 1.962ms (+0.000ms): preempt_schedule (__set_page_dirty_buffers) 1.962ms (+0.000ms): __mark_inode_dirty (__set_page_dirty_buffers) 1.963ms (+0.000ms): filemap_sync_pte (filemap_sync_pte_range) 1.964ms (+0.000ms): set_page_dirty (filemap_sync_pte) 1.964ms (+0.000ms): __set_page_dirty_buffers (set_page_dirty) 1.964ms (+0.000ms): preempt_schedule (__set_page_dirty_buffers) 1.965ms (+0.000ms): radix_tree_tag_set (__set_page_dirty_buffers) Lee