* Joakim Hernberg <jhernberg@xxxxxxxxxx> [2014-09-04 10:09]: > On Thu, 4 Sep 2014 09:03:55 -0400 > "Peter P." <p8rpp@xxxxxxx> wrote: > > > after many years of wondering now and then I am curious what > > qjackctl's display of "DSP load" is supposed to mean? > > It must be some kind of CPU load, as there is no dedicated DSP in my > > computer, so is it the cpu load of the jackd process? > > Furthermore I wonder why the realtime "RT" indicator in qjackctl's > > window is blinking about every 2 seconds. I do have -rt enabled. > > qjackctl's "DSP load" refers to how much of the latency given by > samplerate and buffersize has been used up by the audio processing > callback. That is to say if you have 2.9ms to finish the audio > processing, and the callback takes 1.45ms, then it will > show 50%, if it takes 2.9ms then it will show 100%. Note that it's an > average and not a maximum number, so conventional wisdom is to keep it > under 60% or so, to avoid xruns (ymmw). > > The flashing RT just indicates that JACK is running in rt mode. Joakim, Hermann, thanks to both of you for these excellent answers! best, P _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
