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Standard User thinksingle
(newbie) Tue 16-May-17 16:44:17
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Inaccurate TBB speedtest single thread?


[link to this post]
 
I am using Virgin Media 200 GAMER and when I do a speedtest with TBB, the single thread results never reach 200mbps on TBB but they do when I download test file set to 1 connection on IDM and DSLreports. What could the problem be?

http://i.imgur.com/8T4W1Ns.png

http://i.imgur.com/RPhG8Rs.png

http://i.imgur.com/p9QscE6.png

Edited by thinksingle (Tue 16-May-17 16:45:28)

Administrator MrSaffron
(staff) Tue 16-May-17 18:01:48
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Re: Inaccurate TBB speedtest single thread?


[re: thinksingle] [link to this post]
 
Given the behaviour of the multiple thread test things are not looking particularly good.

A recurring issue with Virgin has been that some routes out of the ISP sometimes run hot (i.e. congesting) so this means some sources/files will be good and others bad.

The 1GB download since it is a large single file may behave better than the test which if the 20MB file is being stalled when requesting subsequent copies can cause odd speeds.

There is no reason why with a low latency service that subsequent file requests should be slow, but this may explain the behaviour, i.e. once the stream for the large file is open and running all is well. Also browser downloads actually automatically multi threading.

On the DSL reports 1/1 do you know where the file was that was used?

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Administrator MrSaffron
(staff) Tue 16-May-17 18:07:26
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Re: Inaccurate TBB speedtest single thread?


[re: MrSaffron] [link to this post]
 
From a quick look of the tests in the last few minutes, some get good speeds and some bad varying a lot, and no alarms of capacity on our network side so

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.


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Standard User thinksingle
(newbie) Tue 16-May-17 19:59:52
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Re: Inaccurate TBB speedtest single thread?


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
Given the behaviour of the multiple thread test things are not looking particularly good.

A recurring issue with Virgin has been that some routes out of the ISP sometimes run hot (i.e. congesting) so this means some sources/files will be good and others bad.

The 1GB download since it is a large single file may behave better than the test which if the 20MB file is being stalled when requesting subsequent copies can cause odd speeds.

There is no reason why with a low latency service that subsequent file requests should be slow, but this may explain the behaviour, i.e. once the stream for the large file is open and running all is well. Also browser downloads actually automatically multi threading.

On the DSL reports 1/1 do you know where the file was that was used?


I've just done some speedtests @ 7PM and here are the results:

TBB Speedtest

http://i.imgur.com/lHGuZTQ.png

TBB 1 connection download

http://i.imgur.com/vTqSmNW.png

DSLReports Speedtest with 1 download connection and 1 upload connection

http://i.imgur.com/mE3KVWM.png

Leaseweb 1 connection download

http://i.imgur.com/ccYrHfA.png

I'm using the Super Hub 3 if that makes any difference and on the CADANT INC CMTS with 16 downstream channels and 2 upstream channels.
Administrator MrSaffron
(staff) Tue 16-May-17 22:14:13
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Re: Inaccurate TBB speedtest single thread?


[re: thinksingle] [link to this post]
 
Did some further checking and there is a now a news article about the problems

https://www.thinkbroadband.com/news/7710-speed-and-l...

Essentially there is a bottleneck somewhere in the Virgin Media network and is a repeat of what went on earlier in year.

That some downloads are fine shows its not their whole network, but as peering at LINX is normally considered important you'd hope a provider would notice something so major

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User broadband66
(fountain of knowledge) Wed 17-May-17 13:46:55
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Re: Inaccurate TBB speedtest single thread?


[re: thinksingle] [link to this post]
 
How is your everyday use of your connection barring test downloads and uploads?

If you can do what you want without buffering, etc then don't worry.

Was Eclipse Home Option 1, VM 2Mb & O2 Standard
Now Utility Warehouse (up to 16mbps) via Talk Talk
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