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From: jb <justin@dslr.net>
To: Dave Taht <dave.taht@gmail.com>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] grading bloat better
Date: Thu, 13 Oct 2016 11:57:24 +1100	[thread overview]
Message-ID: <CAH3Ss955OrRMPTpNwRYD90SS_yMW8_SBNDGzys7c9x9jo2wLGg@mail.gmail.com> (raw)
In-Reply-To: <CAH3Ss945k2HAogxt4o7QhA=O9rbSi2dSzW=9mMkT2dBe7u1EPg@mail.gmail.com>

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It is done
under the trimmed mean method, that would be a "C" grade result.



On Thu, Oct 13, 2016 at 11:46 AM, jb <justin@dslr.net> wrote:

> Actually I think the concept I need is the trimmed mean.
> throwing away the highest couple of values (lowest couple are not to be
> thrown away because they can't be errant).
> It isn't perfect but it would help.
>
> On Thu, Oct 13, 2016 at 11:39 AM, jb <justin@dslr.net> wrote:
>
>> A while ago I changed from mean to median with the reasoning being that
>> one spike to a crazy level was not representative of bloat but instead
>> representative of a network stall or other anomaly. Graphs that were nearly
>> all good samples with one outlier were being unfairly graded poorly.
>>
>> But this example has the opposite issue - the median of this set of
>> samples is the first half where everything is ok. Hence the good score.
>> Using a mean would be correct for this sample.
>> What should happen is to throw away a couple (max) outliers first, then
>> do a mean to avoid punishing the results that come in as good but include
>> one errant measurement.
>>
>> thanks
>> -Justin
>>
>> On Wed, Oct 12, 2016 at 11:16 PM, Dave Taht <dave.taht@gmail.com> wrote:
>>
>>> This has major bloat happening at the end of the upload test. Which
>>> worries me - here, at a gbit.
>>>
>>> http://www.dslreports.com/speedtest/5284047
>>>
>>> --
>>> Dave Täht
>>> Let's go make home routers and wifi faster! With better software!
>>> http://blog.cerowrt.org
>>> _______________________________________________
>>> Bloat mailing list
>>> Bloat@lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/bloat
>>>
>>
>>
>

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  reply	other threads:[~2016-10-13  0:57 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-12 12:16 Dave Taht
2016-10-13  0:39 ` jb
2016-10-13  0:46   ` jb
2016-10-13  0:57     ` jb [this message]
2016-10-13  3:22       ` Dave Taht
2016-10-13  4:37         ` Jonathan Morton
2016-10-14 22:48         ` jb
2016-10-15  4:39           ` Dave Taht
2016-10-15  5:35           ` Jonathan Morton

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