From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: Regression on rt kernel while using POSIX timers Date: Fri, 3 Mar 2017 17:51:37 +0100 (CET) Message-ID: References: <1486579285.29816.105.camel@intel.com> <20170210190708.gkx5pzxnd6uhfczn@linutronix.de> <1487011713.17279.27.camel@intel.com> <20170215165447.zr4k5rmenwvormdk@linutronix.de> <20170216020516.GB1733@jcartwri.amer.corp.natinst.com> <1487212458.10966.7.camel@intel.com> <1487727789.28401.17.camel@intel.com> <20170301152230.mjoi44so6t5qy3q2@linutronix.de> <472B70D9-E1AF-4D14-BE79-ABAAC74BA4DB@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Cc: "bigeasy@linutronix.de" , "Patel, Vedang" , "julia@ni.com" , "ranshalit@gmail.com" , "linux-rt-users@vger.kernel.org" , "Hart, Darren" To: Tracy Smith Return-path: Received: from Galois.linutronix.de ([146.0.238.70]:51102 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752188AbdCCRew (ORCPT ); Fri, 3 Mar 2017 12:34:52 -0500 In-Reply-To: <472B70D9-E1AF-4D14-BE79-ABAAC74BA4DB@gmail.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Wed, 1 Mar 2017, Tracy Smith wrote: First of all, please do not top post and trim your replies. > Pleaee isolate the specific release where latency regression occurred if > the community has not already done so. Which regression are you talking about? > Possibly backing out changes specific to timers and posix threads for > that release to see what impacted latency. The issue Vedang and Sebastian are discussing is a configuration problem. Backing out changes should really solve that. > This is crucial for NXP and others as they migrate to later releases of > the kernel. Thanks for the enlightment, we really were unaware about the crucial importance. tglx