[Voyage-linux] Performance issue w/ALIX and 2 radios

[Beat Meier]

BTW: I will install in a short time an wrap board with 2xcm9 working in 
5.8GHz band.
Will let you know how it is doing the job.

Greetings

Beat

Beat Meier wrote:

> Hi Edwin
>
> How are you?
> I had 2 radio cards in 5.8GHz running with 10mbps throughput without 
> any problems
> if I remember right BUT with wrap!!
> At the moment I have wrap with 5.8 and 2.4 cards in use in the same 
> wrap..
> If you have still a wrap board try it with wrap instead of alix...
>
> Greetings
>
> Beat
>
>
> Edwin Whitelaw wrote:
>
>> Sean,
>>
>> Thanks for the thoughts.  While noise is possible, the radios are 5.2 
>> and 5.8 bands respectively and 5Ghz is non-overlapping as well so I 
>> wouldn't think the effect would be this dramatic.  I've run 2 2.4GHz 
>> cards in a common box and did see some throughput effect but nothing 
>> like I've reported here.  The cpu load doesn't go up much though the 
>> ksoftirqd does consume a fair number of cycles.  I also  wonder 
>> whether the board's design is a factor wrt to the minipci bus, hence 
>> the posting.  Another possible explanation is the driver in handling 
>> the interrupts/dma transfers on the bus.
>>
>> I have a 3 ethernet port ALIX that I will test this on using only the 
>> wired interfaces to rule out/in anything to do with madwifi, hal, 
>> atheros chipset, etc.
>>
>> Edwin
>>
>> Sean wrote:
>>
>>> It could be radio noise in the box, even though you may be using 
>>> different channels.
>>> It could also be cpu. What percentage does your cpu get up to in top 
>>> while running the tests? It would also be good to find out how much 
>>> the minipci backplane in the alix will support.
>>>
>>> Sean
>>>   
>>
>>
>>
>
>
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