Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269301AbUIBX2e (ORCPT ); Thu, 2 Sep 2004 19:28:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269303AbUIBX16 (ORCPT ); Thu, 2 Sep 2004 19:27:58 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:7057 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S269290AbUIBXZg (ORCPT ); Thu, 2 Sep 2004 19:25:36 -0400 Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q8 From: Lee Revell To: Ingo Molnar Cc: Mark_H_Johnson@raytheon.com, "K.R. Foley" , linux-kernel , Felipe Alfaro Solana , Daniel Schmitt , alsa-devel In-Reply-To: <20040902071525.GA19925@elte.hu> References: <20040902063335.GA17657@elte.hu> <20040902065549.GA18860@elte.hu> <1094108653.11364.26.camel@krustophenia.net> <20040902071525.GA19925@elte.hu> Content-Type: text/plain Message-Id: <1094167534.1571.10.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Thu, 02 Sep 2004 19:25:35 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1185 Lines: 29 On Thu, 2004-09-02 at 03:15, Ingo Molnar wrote: > * Lee Revell wrote: > > > Here are traces of a 145, 190, and 217 usec latencies in > > netif_receive_skb: > > > > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-Q6#/var/www/2.6.9-rc1-Q6/trace2.txt > > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-Q6#/var/www/2.6.9-rc1-Q6/trace3.txt > > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-Q6#/var/www/2.6.9-rc1-Q6/trace4.txt > > these all seem to be single-packet processing latencies - it would be > quite hard to make those codepaths preemptible. > > i'd suggest to turn off things like netfilter and ip_conntrack (and > other optional networking features that show up in the trace), they can > only increase latency: > Do you see any optional networking features in the trace (other than ip_conntrack)? I was under the impression that I had everything optional disabled. Lee - 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/