From mboxrd@z Thu Jan 1 00:00:00 1970 From: jordan Subject: Re: Solving Nvidia (blob) latency spikes + convert (nvidia's) semaphores into mutexes patches for 331.20 [patches and links provided] Date: Thu, 5 Dec 2013 20:16:17 -0500 Message-ID: References: <52A1067D.8070009@pavlinux.ru> <52A121F8.7010607@pavlinux.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: "linux-rt-users@vger.kernel.org" To: pavel@pavlinux.ru Return-path: Received: from mail-vc0-f181.google.com ([209.85.220.181]:33631 "EHLO mail-vc0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750970Ab3LFBQS (ORCPT ); Thu, 5 Dec 2013 20:16:18 -0500 Received: by mail-vc0-f181.google.com with SMTP id ks9so29962vcb.40 for ; Thu, 05 Dec 2013 17:16:18 -0800 (PST) In-Reply-To: <52A121F8.7010607@pavlinux.ru> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hey Pavel > Wow, I did not know, thanks. I until on 319.xx I had wondered. lol. ~ because telling someone who is using nvidia-rt >325xx that it doesn't work on rt is a bit odd. ;) ... I thought you must have been mistaken :) take a look in kernel/conftest.sh (of nvidia installer/sources) - You were mistaken because nvidia has changed some of the internals around / how their installer works. It actually appears they are making it more RT friendly... Which is great because i (personally) have been bugging them every couple of months about PREEMPT_RT_FULL :) >>> 3. SFENCE need on SMP systems. Although, delay in 1000 nanoseconds - it's awful >> Would you care to goto into more detail on this? > > https://www.kernel.org/doc/Documentation/memory-barriers.txt Thanks, i'll have a read through + wait for some feedback from nvidia in my thread. jordan