From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nivedita Singhvi Subject: Re: Changing real time priority of interrupt handler thread Date: Tue, 18 May 2010 08:04:58 -0700 Message-ID: <4BF2AC9A.3060301@us.ibm.com> References: <20100505130845.GA9118@rivendell> <4BE1BADA.3040902@us.ibm.com> <1273168487.22438.44.camel@gandalf.stny.rr.com> <1274192889.17960.14.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-rt-users@vger.kernel.org To: "Darcy L. Watkins" Return-path: Received: from e5.ny.us.ibm.com ([32.97.182.145]:43445 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756686Ab0ERPFM (ORCPT ); Tue, 18 May 2010 11:05:12 -0400 Received: from d01relay06.pok.ibm.com (d01relay06.pok.ibm.com [9.56.227.116]) by e5.ny.us.ibm.com (8.14.3/8.13.1) with ESMTP id o4IEn5BZ027175 for ; Tue, 18 May 2010 10:49:05 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o4IF4xOW2224276 for ; Tue, 18 May 2010 11:04:59 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o4IF4wa8022151 for ; Tue, 18 May 2010 11:04:59 -0400 In-Reply-To: <1274192889.17960.14.camel@localhost.localdomain> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Darcy L. Watkins wrote: >>> Have you tried using the rtctl utility and the /etc/rtgroups file? > > Where are the source tarball projects for these located so I can try > porting/using them [at least some of it] on my embedded linux? ... or > is this a proprietary Redhat utility only in RPM binaries? Google > search seems to mainly land me at IBM and Redhat user docs and FAQs. rtctl is GPL, not proprietary. A quick google search brought up the following: http://ftp.riken.go.jp/pub/Linux/cern/mrg/slc5X/SRPMS/ http://ftp.riken.go.jp/pub/Linux/cern/mrg/slc5X/SRPMS/rtctl-1.7-1.el5rt.src.rpm > Perhaps my issue earlier with serial buffer overruns is just a tune up > issue. > > I want to tune up RT on PowerPC 405 and ARM11 MX.31 based embedded > systems where the rootfs is built (cross compiled) using > buildroot/uclibc, etc and not x86 binaries from a full feature distro > such as Fedora, Debian, etc. Setting thread priorities for your environment will certainly be a good thing in general. thanks, Nivedita