From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Sander Subject: Re: AW: Large latencies with 4.4.1-rt6 Date: Thu, 25 Feb 2016 13:52:21 +0100 Message-ID: <7328385.lupKz22AGa@dabox> References: <1A2AF5F768264E479963C4D8C015EB691B692C5C@dlrexmbx03.intra.dlr.de> <2742233.B1dMNehWr7@dabox> <1A2AF5F768264E479963C4D8C015EB691B6973E6@dlrexmbx03.intra.dlr.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-rt-users@vger.kernel.org To: Martin.Wirth@dlr.de Return-path: Received: from krieglstein.org ([176.28.13.145]:51920 "EHLO lvps176-28-13-145.dedicated.hosteurope.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752279AbcBYMwX convert rfc822-to-8bit (ORCPT ); Thu, 25 Feb 2016 07:52:23 -0500 In-Reply-To: <1A2AF5F768264E479963C4D8C015EB691B6973E6@dlrexmbx03.intra.dlr.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hi Martin Am Donnerstag, 25. Februar 2016, 12:47:31 schrieb Martin.Wirth@dlr.de: > > I have also seen a latency increase with 4.4.1-rtX releases. I have= the > > impression that some stable kernel updates made it worse. Care to t= est > > 4.4- > > rt3 or 4.4-rt4? Had not the chance to pin them down by now. >=20 > The worst case cyclictest latencies (running over serveral hours) wit= h pre > 4.4.x-rt versions were below 10 =B5s for an idle system and below 23 = =B5s for a > kernel compile with make -j4. Since this is a machine with is in lab-= use > during the day I hesitate a bit to try too early 4.4.x version which = might > be instable enough to eat my disk. Well the 4.4 releases have been pretty stable for me on ARM but your mi= lage=20 may by different... Best regards Tim -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html