Re: [Bloat] Bufferbloat test measurements

[Alan Jenkins <alan.christopher.jenkins@gmail.com>]

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That's the simplest measure of bufferbloat though :).

Do you have a criticism in terms of dslreports.com?  I think it's fairly 
transparent, showing idle v.s. download v.s. upload.  The headline 
figures are an average, and you can look at all the data points.  (You 
can increase the measurement frequency if you're specifically interested 
in that).

[random selection from Google]
http://www.dslreports.com/speedtest/419540
http://forum.kitz.co.uk/index.php?topic=15620.0

It's more aggressive than a single file download, but that's not 
deliberately to exacerbate bufferbloat.  It's just designed to measure 
performance of prolonged downloads / streaming, in a competitively short 
test.  "For our busy lives", as the overused saying goes.

(The initial summary only gives a grade.  The figure wouldn't be one of 
the headlines their ISP advertises.  Saying "100ms" would confuse 
people.  And the tests they're used to / compare with, show idle latency 
instead.)

On 27/08/16 16:19, Kathleen Nichols wrote:
> Yeah.
>
> I admit to muddying the waters because I think of the size of a buffer as
> being in megabytes and the size of a queue (latency) as being in
> milliseconds. I think the tests attempt to measure the worst possible
> latency/queue that can occur on a path.
>
> On 8/27/16 4:46 AM, Rich Brown wrote:
>> It has always been my intent to define bufferbloat as *latency*. The
>> first sentence on www.bufferbloat.net says, "Bufferbloat is the
>> undesirable latency that comes from a router or other network
>> equipment buffering too much data."
>>
>> That definition focuses on observable/measurable values. It sidesteps
>> objections I've seen on the forums, "How could $TEST measure the size
>> of buffers?"
>>
>> So what matters is whether the buffers (of any size) are filling up.
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