contradictory WiFi flent results

[Azin Neishaboori]

Hi George
Thank you for your reply and helpful comments. You are right. There are too
many players at hand on my setup’s datapath.

I will try to set up more controlled experiments.

Thanks
Best
Azin

On Fri, Jan 18, 2019 at 12:24 AM George Lambert <marchon at gmail.com> wrote:

> I have been on this list for a long time, but I don't normally respond.
>
> With that said, you should keep in mind that when you are using a VM /
> there is a software IP stack that is touching and playing with your
> packets.
>
> I would consider if it is easy to try the following to give yourself a
> more controlled test environment.
>
> 1. run a USB OS without a VM on raw metal to remove the extra network
> routing stacks
> 2. directly cable into your router to eliminate any potential "802.11"
> interference from other devices and neighbors
> 3. see if you get the same/similar results
> 4. For optimal test results - PowerCycle your router to be sure that it
> has freshly reset it's memory -
> 5. Do a traceroute to see if your connection is experiencing any
> interference / packetloss in the route between yourself and the remote
> server.
>
> George -
> ps: If you would like to google hangout or zoom.us to check the
> configuration / I could spend a few minutes with you.
>
> On Thu, Jan 17, 2019 at 11:25 PM Azin Neishaboori <
> azin.neishaboori at gmail.com> wrote:
>
>> Dear all
>> I have some contradictory results on my WiFi link. I run flent's rrul
>> test using several bufferbloat mitigation algorithms, and see that,
>> compared to FQ_codel, TCP BBR, etc., a simple prioritized ACK works the
>> best. Why is that I have no idea. I also am not clear as to why using BBR
>> on the client end increases the download throughput, but not upload (still
>> doing worse than prioritized ACK on cubic in download anyway). Attached
>> please see the plot.
>> What am I missing?
>>
>> My setup is pretty simple. I am on WiFi on my PC, and run flent on an
>> Ubuntu VM on a virtual machine, and connect to netperf.bufferbloat.net.
>> All configurations are done on my VM end of course.
>>
>> Any help/hint would be appreciated.
>>
>> Thanks a lot
>> Best
>> Azin
>>
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>
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