Unexpected Results from nuttcp testing wifi on arm

[Russell Haley]

On Wed, Sep 20, 2017 at 8:56 AM, Carl Johnson <carlj at peak.org> wrote:
> Russell Haley <russ.haley at gmail.com> writes:
>
>> Hi,
>>
>> So I am consistently getting very low throughput when testing with
>> nuttcp if I use my arm board as the client. If the desktop is the
>> client, I am averaging ~8 Mbps. When my arm board is the client, I get
>> an average of  just over 1 Mbps. This doesn't seem right to me. Any
>> input or confirmation that this is incorrect would be grand. My
>> assumption is I have done something wrong. :-/
>>
>> Russ
>
> I find that some USB adapter have asymmetric speeds, similar to what you
> are seeing.  I use iperf3 and get relatively symmetric speeds with a
> RTL8188EU, but not with a RTL8188CUS.  With the RTL8188CUS I see about
> 20Mb/sec send and 1Mb/sec receive.  The RTL8188EU gets about 19Mb/sec
> send and about 21Mb/sec receive.  I hope this helps a little, but I
> don't know anything more than my observations.

Very helpful in validating that I haven't done something drastically
wrong. Thank you.

Russ

> --
> Carl Johnson            carlj at peak.org
>
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