[Galene] Re: we broke galene head pretty badly today

[Dave Taht <dave.taht@gmail.com>]

yes a codel-ly approach would be helpful, but what stage of the
pipeline is costing the most cpu?

What I saw in another set of tests was context switching cost a lot
and that perhaps recvmmsg and sendmmsg would help there.

Still, when you run out of cpu, dropping whole frames would be good.
you could interleave dropping a frame per sender perhaps?

do we know what other sfus do?

On Mon, Jul 5, 2021 at 2:01 PM Juliusz Chroboczek <jch@irif.fr> wrote:
>
> > Galčne currently reacts badly to being out of CPU.  I've tried to design
> > it so it would drop frames and keep the audio going, but I've failed.
>
> Just to be clear, I'm not looking at the load average or CPU utilisation,
> since these measures are typically unreliable on modern CPUs (which vary
> their speed dynamically) let alone on VMs.  I need a quick way to answer
> the following question: I've got this packet that I can drop without
> corrupting the video, should I drop it or not.
>
> Timestamp the packets at ingress time and drop anything droppable that's
> too old?  Any other ideas?
>
> -- Julius



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Dave Täht CTO, TekLibre, LLC