FreeRadius Losing packets in Multi-Threads mode

[Bjørn Mork]

Alan DeKok <aland at deployingradius.com> writes:
> Pierre Rondou wrote:
>>>    It's possible that you're simply sending packets too fast.  If the
>>> server doesn't read them from the socket quickly enough, the kernel will
>>> simply discard them.
>> 
>> Well, then, why is this only happening in the multi-thread mode? If it
>> was a kernel issue, wouldn't it drop the packets in the same way for the
>> single-thread version?
>
>   No.  I mean that the threading code has overhead which doesn't exist
> in the non-threaded mode.  Lock contention is a *major* source of lost
> CPU time in threaded applications.
>
>   If the server is too slow to process requests, the kernel will throw
> away the UDP packets.  This happens when the server is slow... whether
> it's threaded or not.

But then the client won't get the acks and retransmit.  If I understood
correctly, then the problem is the packets *are* acked but not logged.

File locking problem when multiple threads are attempting to update the
same file?


Bjørn