other tests with dragonfly

[Wojciech Puchar]

> For what it's worth, Sepherosa Ziehau has been putting a lot of work into reducing CPU use on high-bandwidth connections:
> http://lists.dragonflybsd.org/pipermail/users/2014-March/128240.html
> 
if i understand correctly it would reduce CPU usage greatly on highly 
loaded server doing lots of TCP transfers.

looks like core i7 with 4 cores and 8 threads can saturate completely 2 
10Gbit/s ethernet interfaces with both directions.

better than FreeBSD, but anyway - it's still over 3 CPU cycles per byte 
transmitted. still very high CPU usage


> http://lists.dragonflybsd.org/pipermail/commits/2014-March/269653.html
> 
> 
> On Sat, May 3, 2014 at 6:54 AM, Wojciech Puchar <wojtek at wojtek.tensor.gdynia.pl> wrote:
>       as my friend advised me, i did flood test - generated lots of random UDP packets with size between 52 and 100 bytes.
>
>       Actually low end ethernet card in my laptop was a limit (rl), but compared FreeBSD 10 with custom kernel and dragonfly 3.6 with generic kernel (that have diagnostics check
>       compiled by default).
>
>       dragonfly used about 3 times less CPU.
>
>       no tests on gigabit or 10 gigabit ethernet and multicore machine for now.
>
>       quite good.
>
>       CPU load on more normal cases (like transfering files using rcp) is lower too, but difference is smaller like 1.5-2 times.
> 
> 
> 
>