From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Sander Subject: Re: Large latencies with 4.4.1-rt6 Date: Thu, 25 Feb 2016 13:34:22 +0100 Message-ID: <2742233.B1dMNehWr7@dabox> References: <1A2AF5F768264E479963C4D8C015EB691B692C5C@dlrexmbx03.intra.dlr.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: linux-rt-users@vger.kernel.org To: Martin.Wirth@dlr.de Return-path: Received: from krieglstein.org ([176.28.13.145]:47738 "EHLO lvps176-28-13-145.dedicated.hosteurope.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759644AbcBYMe1 (ORCPT ); Thu, 25 Feb 2016 07:34:27 -0500 In-Reply-To: <1A2AF5F768264E479963C4D8C015EB691B692C5C@dlrexmbx03.intra.dlr.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hi Martin Am Freitag, 19. Februar 2016, 17:02:20 schrieb Martin.Wirth@dlr.de: > I today switched from 4.1.15-rt17 to 4.4.1-rt6. > Now I'm seeing large latencies of more than 1 ms. > They occur sporadic ( every few minutes) and show up for example running It would be interesting to know the platform the rt kernel is running on? 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 test 4.4-rt3 or 4.4-rt4? Had not the chance to pin them down by now. Best regards Tim