help troubleshooting low throughput

[Kalle Valo]

Tim Harvey <tharvey at gateworks.com> writes:

>> Also, now that I think about you don't have a bridge. This means your
>> AP system has to perform a lot more packet mangling which I guess can
>> be pretty taxing for the A9.
>>
>
> yep - turns out it is a cpu bottleneck. I'm not sure what I was
> looking at when I checked the performance before but now I see that I
> am hitting 100% utilization.
>
> Putting the AP in a bridge and moving iperf off of it, brings up my
> TCP bandwidth to 240mbps (at which point the STA running iperf is 100%
> pegged) and 463mbps UDP (at which point the AP was 100% pegged).

Did you check that you had all kernel debug options disabled, including
ath10k debug options? Kernel debugging code can significantly decrease
maximum throughput.

-- 
Kalle Valo