From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4F931496.1060607@domain.hid> Date: Sat, 21 Apr 2012 22:12:06 +0200 From: xenophile MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Xenomai-help] linux 2.6.11 List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xenomai@xenomai.org Hi, I am trying to see why a trivial driver reading an ADC on an EP9312 ARM board has slowed by a factor of three. Since I installed it under 2.6.29 a couple fo years ago. It's looking like this is due to a kernel update I did in the mean time to 2.6.32 I have just built a new toolchain and rebuilt the kernel to 2.6.33 and the result is about the same. I recall a number of years ago running a 2.6.11 kernel and the system was incredibily responsive. I could be building kde-libs, downloading at full speed browsing and listening to mp3 decoded music all without the slightest lack of responsiveness in the browser not a glitch in the mp3 playback. It was truly impressive. Now I find if I am rebuilding the toolchain , the browser or any other window can take over a second to respond to a redraw ( 2.6.32 on this machine). Now I've seen comments on audio forums that there was nothing better than linux 2.6.11 for real time audio work. I'm wondering whether there is not a general degradation in the linux kernel as time goes on. It certainly seems to be getting forever bigger and slower. Would there be any value in trying to rebuild a 2.6.11 based system for realtime work ? TIA,