Re: [Bloat] DSLReports Speed Test has latency measurement built-in

[David Lang <david@lang.hm>]

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On Sun, 19 Apr 2015, David Lang wrote:

> As a start, the ping time during the test that shows up in the results page 
> is good, but you should show that on the main screen, not just in the 
> results+share tab.

Thinking about it, how about a graph showing the ratio of latency under test to 
the initial idle latency along with the bandwidth number?

David Lang

> it looked like the main test was showing when the upload was stalled, (white 
> under the line instead of color), but this didn't show up in the report tab.
>
> I also think that the retransmit stats are probably worth watching and doing 
> something with. You are trying to drive the line to full capacity, so some 
> drops/retransmts are expected. How many re expected vs how many are showing 
> up?
>
> http://www.dslreports.com/speedtest/320230 (and now you see my pathetic link)
>
> David Lang
>
>
> On Sun, 19 Apr 2015, jb wrote:
>
>> Date: Sun, 19 Apr 2015 15:26:51 +1000
>> From: jb <justin@dslr.net>
>> To: Dave Taht <dave.taht@gmail.com>, bloat@lists.bufferbloat.net
>> Subject: Re: [Bloat] DSLReports Speed Test has latency measurement built-in
>> 
>> The graph below the upload and download is what is new.
>> (unfortunately you do have to be logged into the site to see this)
>> it shows the latency during the upload and download, color coded. (see
>> attached image).
>> 
>> In your case during the upload it spiked to ~200ms from ~50ms but it was
>> not so bad. During upload, there were no issues with latency.
>> 
>> I don't want to force anyone to sign up, just was making sure not to
>> confuse anonymous users with more information than they knew what to do
>> with. When I'm clear how to present the information, I'll make it available
>> by default, to anyone member or otherwise.
>> 
>> Also, regarding your download, it stalled out completely for 5 seconds..
>> Hence the low conclusion as to your actual speed. It picked up to full
>> speed again at the end. It basically went
>> 40 .. 40 .. 40 .. 40 .. 8 .. 8 .. 8 .. 40 .. 40 .. 40
>> which explains why the Latency measurements in blue are not all high.
>> A TCP stall? you may want to re-run or re-run with Chrome or Safari to see
>> if it is reproducible. Normally users on your ISP have flat downloads with
>> no stalls.
>> 
>> thanks
>> -Justin
>> 
>> 
>> 
>>> On Sun, Apr 19, 2015 at 2:01 PM, Dave Taht <dave.taht@gmail.com> wrote:
>>> 
>>>> What I see here is the same old latency, upload, download series, not
>>>> latency and bandwidth at the same time.
>>>> 
>>>> http://www.dslreports.com/speedtest/319616
>>>> 
>>>> On Sat, Apr 18, 2015 at 5:57 PM, Rich Brown <richb.hanover@gmail.com>
>>>> wrote:
>>>>> Folks,
>>>>> 
>>>>> I am delighted to pass along the news that Justin has added latency
>>>> measurements into the Speed Test at DSLReports.com.
>>>>> 
>>>>> Go to: https://www.dslreports.com/speedtest and click the button for
>>>> your Internet link. This controls the number of simultaneous connections
>>>> that get established between your browser and the speedtest server. After
>>>> you run the test, click the green "Results + Share" button to see 
>>>> detailed
>>>> info. For the moment, you need to be logged in to see the latency 
>>>> results.
>>>> There's a "register" link on each page.
>>>>> 
>>>>> The speed test measures latency using websocket pings: Justin says that
>>>> a zero-latency link can give 1000 Hz - faster than a full HTTP ping. I 
>>>> just
>>>> ran a test and got 48 msec latency from DSLReports, while ping
>>>> gstatic.com gave 38-40 msec, so they're pretty fast.
>>>>> 
>>>>> You can leave feedback on this page -
>>>> http://www.dslreports.com/forum/r29910594-FYI-for-general-feedback-on-the-new-speedtest
>>>> - or wait 'til Justin creates a new Bufferbloat topic on the forums.
>>>>> 
>>>>> Enjoy!
>>>>> 
>>>>> Rich
>>>>> _______________________________________________
>>>>> Bloat mailing list
>>>>> Bloat@lists.bufferbloat.net
>>>>> https://lists.bufferbloat.net/listinfo/bloat
>>>> 
>>>> 
>>>> 
>>>> --
>>>> Dave Täht
>>>> Open Networking needs **Open Source Hardware**
>>>> 
>>>> https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67
>>>> _______________________________________________
>>>> Bloat mailing list
>>>> Bloat@lists.bufferbloat.net
>>>> https://lists.bufferbloat.net/listinfo/bloat
>>>> 
>>> 
>>> 
>

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