On Thu, Sep 30, 2010 at 11:45 AM, Ralf Mardorf <[email protected]> wrote: > Why does Ubuntu Studio comes without PREEMPT RT, but just PREEMPT?! > This is my intension. > > FWIW, I'm a professional audio and video engineer and did program oldish > computers and I'm missing hard real-time for modern PCs. Even the > kernel-rt isn't able to do hard real-time, so I don't understand why > Ubuntu Studio does prefer a kernel without rt-patch. Today the rt-patch > isn't good enough and any kernel without this patch is useless for > multimedia production. > > So a misunderstanding ;)!
Hello Ralf, You keep coming back to -rt/-realtime, but nobody ever questioned their greatness. I trust you when you mention -rt is the ideal solution in your heavy MIDI use case, and I would also *love* a properly maintained -rt kernel in Studio. Now, whether we want it or not, the facts are: - Preparing -realtime (vanilla+rtpatch) or -rt (vanilla+ubuntusauce+rtpatch) is a lot of work and there are no resources for this - On the contrary, -lowlatency (generic with some config tweaks) means performance tradeoff, _but_ could happen in a PPA (maybe even in the archives in Natty) because it is less of a maintenance hell You mention you have some custom built kernels, so if you feel like helping maintaining -realtime/-rt, by all means step in, talk to Alessio and make it happen. But insisting again and again on -rt and -realtime without considering the possibilities is only going to discourage him from working on the feasible options. He tries to propose sustainable options and the only echoes are negative, without much questioning. What are the results of your own tests with -lowlatency? What kind of performance drop have you met on one of your heavy setups? How much latency lost, on which kind of machine / firewire card? Ronan -- Ubuntu-Studio-users mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
