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I might get flamed for this however GUI should not really be run with rt priority,<br>that is an honour for the DSP engines. There are some reasonable arguments<br>however for leaning on the scheduler with renice for the user interfaces to give<br>them a bit of a bias over other system operations. Admittedly a big topic since<br>the GUI probably sits on top of the windowing system anyway.<br><br>So I have not used renice on graphics/GUI processes but I have worked on <br>systems where the RT DSP code is happily chewing up 75% of CPU to churn <br>out 32 unified synth voices and the GUI response can then give a bad impression<br>of an application. Renice will help the sometime intensive graphics manipulation<br>code (which is surprisingly close to DSP anyway if you are doing subpixel image<br>transforms with shadow rendering) to get a little more of the now starved system <br>resources.<br><br>I don't see any point to advise not giving the audio group access to this option<br>since you can argue that, whilst it does not do anything very spectacular, it is not <br>going to damage system integrity any further than the already active RT priority <br>rights. Low latency audio systems are all about tuning and this remains one of<br>the tools available to you.<br><br>Regards, cnik.<br><br>"we have to make sure the old choice [Windows] doesn't disappear”.<br>Jim Wong, president of IT products, Acer<br><br><br><br><br>> Date: Wed, 1 Jun 2011 07:27:39 -0400<br>> From: paul@linuxaudiosystems.com<br>> To: ralf.mardorf@alice-dsl.net<br>> CC: linux-audio-dev@lists.linuxaudio.org<br>> Subject: Re: [LAD] Any package builders here?<br>> <br>> On Wed, Jun 1, 2011 at 5:50 AM, Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:<br>> > Hi :)<br>> ><br>> > could you please add a dependency to audio/MIDI app packages for your<br>> > distros, that will set up real-time usage?<br>> ><br>> > The following issue is wide spread:<br>> ><br>> > -------- Forwarded Message --------<br>> > > Be sure you are able to run audio apps with the right<br>> > privileges, eg.<br>> > > add your user to the "audio" group in /etc/groups and check<br>> > > out /etc/security/limits.conf for these lines<br>> > > @audio - rtprio 100<br>> > > @audio - nice -10<br>> <br>> for the n-hundreth time: nice has no role to play in improving the<br>> performance of pro-audio/music creation software.<br>> _______________________________________________<br>> Linux-audio-dev mailing list<br>> Linux-audio-dev@lists.linuxaudio.org<br>> http://lists.linuxaudio.org/listinfo/linux-audio-dev<br> </body>
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