Re: [Bismark-devel] about ready to do another build

[Dave Taht <dave.taht@gmail.com>]

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A much longer test would be to download this

wget -4
http://gw.lab.bufferbloat.net/capetown/capetown-wndr3700v2/OpenWrt-ImageBuilder-ar71xx-for-Linux-x86_64.tar.bz2

while pinging somewhere fairly close by.

Over your wired and wireless connection(s)...

Over multiple downloads, too...

Sorry to make you work so hard. I am SO OVERJOYED to get some data on this
problem, however.....

(yes, I'll change it to lab.bismarkproject.net as soon as DNS lands)

On Fri, May 20, 2011 at 4:42 PM, Dave Taht <dave.taht@gmail.com> wrote:

>
>
> On Fri, May 20, 2011 at 4:35 PM, Nick Feamster <feamster@cc.gatech.edu>wrote:
>
>>
>> On May 21, 2011, at 12:28 AM, Dave Taht wrote:
>>
>> >
>> > And btw, what are the results of a speedtest from your location without
>> QoS on?
>> >
>>
>> Have run it 2x now.
>>
>> I see about 850 kbps down and 400 kbps up.
>>
>> The default upload setting is abusive.
>>
>
> Sorry. Nicaragua typically had 64k-128k up. Took my best guess.
>
>
>>
>> > With QoS on, set to up/dl values within a few percentage points of that
>> (and the overhead calculation disabled)
>> >
>>
>
> And with QoS set to say 840/380, with the overhead calculation disabled?
> Should be about 15% below that for a long bulk transfer. Can get closer...
>
> Please note that setting these values on the basis of one datapoint in a
> majorish city will result in bad values deeper in the country....
>
> Helps to also ping somewhere at the same time of the test to see your
> latencies start to go to heck as you get closer to the "edge". You'll see it
> start to jitter... then go wildly late... and at extreme values, tcp/ip will
> start to malfunction as per the bufferbloat diagrams...
>
> I'd LOVE for a few tcpdumps of stuff like this, from where you are.....
>
>  > I can bake a better default into the next build, but I was figuring
>> you'd be lucky to be gettting 1000 down....
>> >
>> > I want to note that according to your previous study, the first 30
>> seconds of data need to be discarded in order for a speedtest to be valid,
>> and speedtest.net doesn't do that...
>>
>> Yep yep... though I don't think PowerBoost is enabled over here.
>>  Although, we'll find out. :-)
>>
>> -Nick
>
>
>
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://the-edge.blogspot.com
>



-- 
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com

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