Hi Daniel, Interesting point here. Do you mean you edited the /etc/security/limits.conf even when running the non rt kernel and that it made things better than with the non-edited /etc/security/limits.conf ?
That's definitely one thing I must try then... To get even more off-topic (even though I'm not really convenced it is) I noticed as well that rt kernels are really aggressive. For instance when I just play mp3s through jack with the hdsp driver it eats all performance for the rest of desktop apps which then get really really sluggish (on a PIV 3000MHz...). Jé Daniel Wilcox a écrit : > To all those Pd Ubuntu-ers out there, > > I have been using the realtime (lowlatency) kernel for a while, back > since Feisty, and compiled my own in Dapper. > > I have noticed that, at least with Gusty, the generic kernel works > better then the rt kernel, giving me much *fewer*? xruns > and artifacting with Pd ... while using the rt kernel, Pd seems to > "sput" xruns while using Jack. It's important to note that I > did enable the realtime privledges by writing to the security config as > noted on the Ubuntu studio page: > sudo su -c 'echo @audio - rtprio 99 >> /etc/security/limits.conf' > sudo su -c 'echo @audio - memlock 250000 >> /etc/security/limits.conf' > sudo su -c 'echo @audio - nice -10 >> /etc/security/limits.conf' > > Could it be that the preemption enabled in the rt kernel is a bit *too* > aggressive? Realtime audio in PD with Jack seems to run much > better with the generic kernel! Even at a 8ms latency ... in fact I'm > testing the same on my slow performance computer (PIII 500MHz) with a > fresh install of a Minimal command line Gutsy and it works *soooo* much > better then the realtime kernel. (Plus suspend and > hibernation work, while they don't using the realtime kernel.) > > -- > Dan Wilcox > danomatika > www.robotcowboy.com <http://www.robotcowboy.com> > > > ------------------------------------------------------------------------ > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
