From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264991AbUHSKhK (ORCPT ); Thu, 19 Aug 2004 06:37:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265086AbUHSKhK (ORCPT ); Thu, 19 Aug 2004 06:37:10 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:3972 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S264991AbUHSKhF (ORCPT ); Thu, 19 Aug 2004 06:37:05 -0400 Subject: Re: [patch] voluntary-preempt-2.6.8.1-P4 From: Lee Revell To: Ingo Molnar Cc: linux-kernel , Thomas Charbonnel , Florian Schmidt , Felipe Alfaro Solana , William Lee Irwin III In-Reply-To: <1092911341.1739.1.camel@krustophenia.net> References: <20040816040515.GA13665@elte.hu> <1092654819.5057.18.camel@localhost> <20040816113131.GA30527@elte.hu> <20040816120933.GA4211@elte.hu> <1092716644.876.1.camel@krustophenia.net> <20040817080512.GA1649@elte.hu> <20040819073247.GA1798@elte.hu> <1092902417.8432.108.camel@krustophenia.net> <20040819084001.GA4098@elte.hu> <1092905104.8432.116.camel@krustophenia.net> <20040819085643.GA4751@elte.hu> <1092911341.1739.1.camel@krustophenia.net> Content-Type: text/plain Message-Id: <1092911899.810.1.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Thu, 19 Aug 2004 06:38:20 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2004-08-19 at 06:29, Lee Revell wrote: > Yes, this takes care of it. Now the dominant latency is the 142us > latency from the via-rhine driver, which is fixed by using the driver > from -mm (specifically it's fixed in bk-netdev.patch). > OK, this is a new one: preemption latency trace v1.0.1 ------------------------------- latency: 104 us, entries: 26 (26) ----------------- | task: pdflush/33, uid:0 nice:0 policy:0 rt_prio:0 ----------------- => started at: find_get_pages_tag+0x19/0x90 => ended at: find_get_pages_tag+0x61/0x90 =======> 0.000ms (+0.000ms): find_get_pages_tag (pagevec_lookup_tag) 0.000ms (+0.000ms): radix_tree_gang_lookup_tag (find_get_pages_tag) 0.000ms (+0.000ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.004ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.008ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.015ms (+0.006ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.019ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.022ms (+0.002ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.026ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.030ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.034ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.038ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.044ms (+0.005ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.048ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.055ms (+0.007ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.057ms (+0.002ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.060ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.066ms (+0.005ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.070ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.074ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.082ms (+0.008ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.083ms (+0.000ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.088ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.092ms (+0.004ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.095ms (+0.003ms): __lookup_tag (radix_tree_gang_lookup_tag) 0.102ms (+0.007ms): sub_preempt_count (find_get_pages_tag) Lee