[kea-dev] Good news and bad news

[Thomas Markwalder]

On 11/30/18 7:12 AM, Francis Dupont wrote:
> It is a known defect
And where is it written down?

> and the fact it was not reproduce in the threaded
> receiver is not an accident.

Nor did I suggest that it was, well done for doing it that way, Francis.

>   Note in the real world it should not happen
> or with other words do not expect an overloaded server to perform well.

It can happen in the real world, and I suspect the more interfaces one 
has the worse it becomes.  I reduced the rate of perfdhpc to 100 LPS, 
and while the starvation was not as pronounced, it is still present:

Running: perfdhcp -4 -r 100 -R 500000 -p 5 178.16.1.10
***Rate statistics***
Rate: 22.7687 4-way exchanges/second, expected rate: 100
***Statistics for: DISCOVER-OFFER***
sent packets: 481
received packets: 292
drops: 189

Running: perfdhcp -4 -r 100 -R 500000 -p 5 175.16.1.10
***Rate statistics***
Rate: 95.8575 4-way exchanges/second, expected rate: 100

***Statistics for: DISCOVER-OFFER***
sent packets: 482
received packets: 481
drops: 1


> I suggest to add this in the known issue list.
>
> Regards
>
> Francis Dupont <fdupont at isc.org>