From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Grandegger Subject: Re: 2.6.24-rc8-rt1 Date: Thu, 17 Jan 2008 21:01:41 +0100 Message-ID: <478FB425.6050406@grandegger.com> References: <1200544050.318.18.camel@localhost.localdomain> <478F2A46.5070506@grandegger.com> <1200586632.18731.141.camel@imap.mvista.com> <478F9BCE.4030301@grandegger.com> <1200594655.18731.148.camel@imap.mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Daniel Walker , LKML , RT , Ingo Molnar , Thomas Gleixner To: Steven Rostedt Return-path: Received: from mail-out.m-online.net ([212.18.0.9]:34761 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751645AbYAQUBo (ORCPT ); Thu, 17 Jan 2008 15:01:44 -0500 In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: Steven Rostedt wrote: > On Thu, 17 Jan 2008, Daniel Walker wrote: > >> On Thu, 2008-01-17 at 19:17 +0100, Wolfgang Grandegger wrote: >>> [ 0.733248] TCP bind hash table entries: 2048 (order: 3, 57344 >>> bytes) >>> [ 0.741132] TCP: Hash tables configured (established 2048 bind >>> 2048) >>> [ 0.747981] TCP reno registered >>> [ 0.805896] krcupreemptd setsched 0 >>> [ 0.809657] prio = 98 >> That's interesting .. You chould try running cyclictest at priority 99 >> to eliminate other threads that might get involved (using -p99 instead >> of -p80 , I think) .. >> > > But, anotherthing to try is disabling CONFIG_PREEMPT_RCU_BOOST, and see if > that fixes anything. It did not really help: /cyclictest -n -p99 -i1000 3.89 3.46 1.77 1/43 3830 T: 0 ( 916) P:99 I:1000 C: 520752 Min: 52 Act: 112 Avg: 105 Max: 960 Any other idea? Wolfgang.