[LAU] XanMod kernel
rosea.grammostola at gmail.com
Sun Jun 7 13:21:59 CEST 2020
On 6/4/20 3:09 PM, Paul Davis wrote:
> This is wrong. The behavior of a "normal", "low latency" and
> "preempt-RT" kernel are all different, and for realtime audio work,
> the correct behavior is only going to happen with a "preempt-RT" kernel.
> However ...
> The behavior of the normal and "low latency" kernels have changed over
> the years too, and on *some* systems (from a hardware perspective),
> they will function similarly enough to a "preempt-RT" kernel that a
> realtime audio workflow will be just fine. In addition, the "behavior"
> gap between a "preempt-RT" kernel and a normal kernel will be less and
> less apparent as the latency settings (buffer/period size) become more
> relaxed (i.e. grow larger).
> How do you know which systems this is true for? You just have to try
> it. It is a complicated mixture of many different aspects of the
> hardware. There's an overview of the kinds of things that can
> contribute to the need for a "preempt-RT" kernel here:
Fwiw, I did my best to optimize a thinkpad t420 laptop for linuxaudio
using the realtime script from the wiki mostly and the information in
the Ardour docs.
At least I can run Zynaddsubfx with 0.726 msec latency now without xruns
using a cheap Behringer usb device. ;)
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