Thanks for the responses!
I am aware of the DPDK/Netmap system but the snabb-switch thing is really new
to me. I will get back after looking into that soon!
Chaitanya
On Friday, May 9, 2014 10:37 AM, Antti Kantee <[email protected]> wrote:
On 09/05/14 16:06, Justin Cormack wrote:
>> > [netmap, dpdk & snabb]
>>
>> Running the networking stack "behind" the kernel has slightly different
>> characteristics over a purely userspace stack:
>>
>> * applications use the kernel-offered service by default
>> * syscall RPC is fast (let's not deny that it's RPC ;) so if you need >1
>> application to use the same networking stack, it might end up being a
>> better performing approach
>>
>
> Sure, was just looking at all the options. Some prototyping to see what
> performs well would be useful.
My point was that performance isn't the only item to look at ;)
If we threadjack a bit and talk strictly about userspace networking, I
still postulate that the choice of packet I/O framework will not matter
very much. Packet I/O cost is around 50 cycles per batch processed
packet, while turning data into a packet (and vice versa) is >2000 cycles.
So, I think that the best choice for most users will be the framework
that performs best in other metrics such as ease-of-installation,
hardware support, "ecosystem" (buzzword warning!) etc.
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