Does FreeBSD have sendmmsg or recvmmsg system calls?

[Adrian Chadd]

On 7 January 2016 at 23:58, Mark Delany <c2h at romeo.emu.st> wrote:
> On 08Jan16, Bruce Evans allegedly wrote:
>> If the NIC can't reach line rate
>
>> Network stack overheads are also enormous.
>
> Bruce makes some excellent points.
>
> I challenge anyone to get line rate UDP out of FBSD (or Linux) for a
> 1G NIC yet alone a 10G NIC listening to a single port. It was exactly
> my frustration with UDP performance that led me down the path of
> *mmsg() and netmap.
>
> Frankly this is an opportunity for FBSD as UDP performance appears to
> be a neglected area.

I'm there, on 16 threads.

I'd rather we do it on two or three, as a lot of time is wasted in
producer/consumer locking. but yeah, 500k tx/rx should be doable per
CPU with only locking changes.



-a



-adrian

>
>
> Mark.
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