From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Revell Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q8 Date: Thu, 02 Sep 2004 03:04:14 -0400 Sender: linux-kernel-owner@vger.kernel.org Message-ID: <1094108653.11364.26.camel@krustophenia.net> References: <20040902063335.GA17657@elte.hu> <20040902065549.GA18860@elte.hu> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20040902065549.GA18860@elte.hu> To: Ingo Molnar Cc: Mark_H_Johnson@raytheon.com, "K.R. Foley" , linux-kernel , Felipe Alfaro Solana , Daniel Schmitt , alsa-devel List-Id: alsa-devel@alsa-project.org On Thu, 2004-09-02 at 02:55, Ingo Molnar wrote: > i've released the -Q8 patch: > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc1-bk4-Q8 > > ontop of: > > http://redhat.com/~mingo/voluntary-preempt/diff-bk-040828-2.6.8.1.bz2 > 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 Some of these are with ip_conntrack enabled, at the request of another poster, this does not make much of a difference, it increases the worst case latency by 20 usec or so. Also there is the rt_garbage_collect issue, previously reported. I have not seen this lately but I do not remember seeing that it was fixed. Lee