I'm not sure how to catch the output. I'm not getting any messages to the root shell. Am I supposed to?
I'm testing the 2.6.38-7 -generic, and it is in fact working better than before. Almost as well as -lowlatency. On 04/01/2011 03:36 AM, David Henningsson wrote: > On 2011-03-25 05:21, ailo wrote: >> I've been doing some testing on previous kernels together with a few >> people, and the sum of my experience is, just use jack with a program >> you like, try using the lowest latency you can. > > Hi ailo, > > I see you're the only one that has updated the wiki with info saying > that lowlatency kernel actually gives you lower latency than the generic > kernel. > > I'm a little curious as of what is causing this. Could you please try > the following: > - Start the latest generic kernel > - Start your audio programs (jack etc) and verify that the latency is > still not ok/optimal. Set your latency settings to the latency that you > are able to achieve successfully with the lowlatency kernel, but gives > you xruns in the generic kernel. > - Run the following commands: > sudo -s > cd /sys/kernel/debug/tracing > echo 0 > tracing_enabled > echo wakeup_rt > current_tracer > echo 1 > tracing_enabled > - While in that root shell, wait for an xrun, then attach the output of > the "trace" file here. For the trace file to be of the most use, it > should contain a latency value of ms (as in milliseconds rather than > microseconds), and the task should be "jackd". > > You can then > echo nop > current_tracer > ...to disable the tracer again, as it might take some additional CPU. > > Thanks! > -- ailo -- Ubuntu-Studio-devel mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-devel
