linuxaudio.org

Guru Prasad B. R. wrote:

quoted text
>  Till recently, my linuxsampler setup on this particular system was

> working without (major, noticable) glitches, i.e very few xruns and

> not many dropped notes. Since the past few days, however, I'm seeing a

> host of xruns and buzzes and drop notes.

After (quite!) a bit of trial and error, I figured out how to make the

realtime warning go away. Here's the new end of the

/etc/security/limits.conf file:

|@audio          hard    rtprio          50

@audio          soft    rtprio          30

@audio   -  rtprio     100

@audio   -  memlock    unlimited

@audio   -  nice      -19

# End of file

Not sure whether the 3 rtprio entries are necessary (result of copy

pasting from different howtos on the net...!). message no longer

appears. I look forward to better solutions.

But the xruns remained... until I found the culprit: qjackctl was

spiking CPU. Was about to complain to Rui, then found the source - it

was a python script that I had edited a few days ago... and was spewing

out dozens of warnings per second. Auto-launched from qjackctl, so the

message window was clogging up, and therefore the spikes..! Closed the

message window, and xruns dissappear.
On a side note, I now have ~5.2 ms latency on an old Celeron laptop,

with the vanilla kernel...! Linuxsampler + jackdmp has turned out to be

a rather stable combination. Am getting down to building a proper

realtime kernel, now....

Cheers,
Guru

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