Thank you very much for the explanation and the fix. I am confronted by the dsltestreports stuff every day on my search for bufferbloat. I don't consider it annoying, but as a chance to spot check!
... I still might quibble, but a trimmed mean makes more sense than just a mean. Problem I always have is bloat is biased always towards the end of a test. Here, at 1gbit, it took nearly 20 seconds to start going boom. Maybe we need to invent a new distribution (The bloat distribution? The TCP distribution)... You are getting towards a big dataset now. (has it been a year yet?) Got anyone lined up for a paper on it? I'd still love it if one day someone could take all the data you are filtering out, and plot that.... I imagine the user's test result is cached and not subject to these modifications? On Wed, Oct 12, 2016 at 5:57 PM, jb <[email protected]> wrote: > 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 >>>> [email protected] >>>> https://lists.bufferbloat.net/listinfo/bloat >>> >>> >> > -- Dave Täht Let's go make home routers and wifi faster! With better software! http://blog.cerowrt.org _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
