[LAU] Realtime latency kernel testing

[Peter Plessas]

ailo wrote:
> I've been looking around for any tests made comparing the different
> kernels, -rt, generic, or any other type of realtime enchanced kernel.
> I haven't found any test results yet, at least none audio related. I did
> find some testing tools at rt.wiki.kernel.org, but don't know if and how
> they could be made relevant to audio low latency testing.
> 
> I suppose the most interesting results would come from testing different
> kernels with jack/alsa and jack/ffado.
> 
> Has anyone done such tests?

There is jack_delay from fons, which can measure the effective overall
latency of your soundcard/drivers/jack/whatever. Plus there is a
"latency.pd" patch that does the same (but with less precision) and
which also features a nice "continuity" measurement, detecting cliks and
dropouts.

best, P