[Freeswitch-users] Realtime kernels - CONFIG_PREEMPT_RT

Anthony Minessale anthony.minessale at gmail.com
Mon May 8 20:17:51 UTC 2017


We do use realtime priorities on the scheduler, however, so some threads
can be elevated to the least possible ignore time from the kernel.


On Mon, May 8, 2017 at 2:53 PM, Piotr Gregor <piotrek.gregor at gmail.com>
wrote:

> Hi Karl,
>
> RT kernels are not about speed, but about guaranteed biggest latency, i.e.
> bounded latency in the kernel.
> That highest latency gets significantly improved if RT is set up correctly
> (which is not so straightforward).
> In case of VoIP the most latency in playing audio stream comes from
> network congestion, dropouts, etc.,
> therefore it is external to the kernel and most likely there is not that
> many degrees of freedom in this space
> which real time system could improve.
>
> Piotr
>
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