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

[Beat Meier]

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
>>   
>
>