Odd TBB test ?

[#1]

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@MrSilver wrote:

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@SpendLessTime wrote:

Next test ran correctly.

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Can you try just this link and not via the tbb page? http://http-speedtest4.thinkbroadband.com/20MB.zip 

Try a few times 30 mins or so apart.

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Im running that test right now and its telling me it will take 5 minutes to download the test file....

Im getting a whopping 67.2kbps.....

[#2]

It downloads in under 5 seconds.

I cannot guarantee when I'll get a slow result,  it is extremely random and can take days to occur.

P.S. Your link has random characters on the end which I have to manually delete before downloading the file.

[#3]

@MrSilver am now on home network , In Private browsing TBB html test has same result   slow single speed

20 mg test file comes down Very fast 2-3 sec

[#4]

Just doing a 20MB download and this one is taking forever. Took about 6 minutes.

Started another one just after, and the speed was just as bad.

[#5]

I've run the 20mb tests file a few times now and here are the results

1st time - 5 minutes

2nd time - 6 seconds

3rd time - 4 minutes

4th time -  9 seconds

5th time - 5 mintues

6th time -  7 seconds

All theses where done one after the other with only a few seconds between the tests.

[#6]

thats all, some interesting results, need to ponder now what it could be.. 

Its pretty clear it's not congestion as @davenos results are quite good to have like that.

Its almost like there is a choice somewhere where packets can go down one of multiple paths, like a load balanced group / LAG group in ethernet terms, when you hit one link its good, if you hit the other patch its bad and really goes slow.

It may not be a physical link, it may even be something that has multiple processor cards in a router that is not behaving correctly too.

Can ppl also post what gateway they are on? I dont think its a specific gateway issues, but looks like we are on 2 bits of the network, ones that go in via xxx-bngxx and ones that dont go via BNGs.

From other posts it looks like capped users and static IP users go via BNGs rest done. 

If you go to http://usertools.plus.net/@gateway/ and post the results and if you have been getting x1 slowdown problems (not general slowdown, but the specific ones for this thread)

thx

[#7]

Still awaiting any significant input from PN all we had so far is to tell us its not just PN

[#8]

Static IP 

pcn-bng04.plus.net (84.93.253.94) 

[#9]

Im on a dynamic IP and this is the following results from the gateway checker,

Sorry, the tool failed to identify your gateway; this does not mean that anything is wrong with your connection.

Posting the following information as a reply to the Gateway Checker Issues topic in the Community forums will help us to diagnose the problem.

• core2-hu0-18-0-0.southbank.ukcore.bt.net (62.172.103.24) 4.628 ms

[#10]

I downloaded the 20MB files a few times but didn't get a chance to see the download speed as they came down that bleedin quick!

You are currently connected to gateway pcn-bng04.

This is located in Colindale Point of Presence.

eta: static IP hence me not posting it

[#11]

Right, spent some time on @davenos trace from Sunday, it looks like there are lots of out of order packets, but i may be a little rusty so if anyone else is strong on networking welcome your input or @bobpullen can you get your guys to review?

The trace itself is linked below so anyone can get the same filter.

The key packet to look at starts at packet 3, the receiver is saying its expecting a sequence number ending 42661, but the next 11 packets are all later sequence numbers before packet 26 when the packet it was expecting came in. 

TCP should handle this with its windows so it can use data thats come in, but the next client ack is now expecting 58539 which should be the next packet after the backlog its just got, but the next packet skips that and goes to 62883, and has to wait till packet 38 until it gets the packet it was expecting.

So when we have a slow trace we are getting some late arrivals of packets.

Packet 43/44 is also odd, both ack'ing 61435 then in 45 jumping to 87499 without ever getting packt 61435... 

It almost looks like there is some retransmissions happening that are not visible to TCP, possibly underlying network protocol. 

thoughts / comments?

http://www.filedropper.com/sundayfail

[#12]

Here are my wget tests - speed / time lines marked in bold

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:02:53-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip’

20MB.zip 100%[=====================================================================================================>] 20.00M 3.84MB/s in 5.3s

2016-12-21 18:02:59 (3.75 MB/s) - ‘20MB.zip’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:03:08-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.1’

20MB.zip.1 100%[=====================================================================================================>] 20.00M 3.84MB/s in 5.3s

2016-12-21 18:03:14 (3.77 MB/s) - ‘20MB.zip.1’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:03:15-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.2’

20MB.zip.2 100%[=====================================================================================================>] 20.00M 3.83MB/s in 5.3s

2016-12-21 18:03:20 (3.81 MB/s) - ‘20MB.zip.2’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:03:22-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.3’

20MB.zip.3 100%[=====================================================================================================>] 20.00M 3.85MB/s in 5.3s

2016-12-21 18:03:27 (3.79 MB/s) - ‘20MB.zip.3’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:03:30-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.4’

20MB.zip.4 100%[=====================================================================================================>] 20.00M 62.0KB/s in 3m 45s

2016-12-21 18:07:15 (91.1 KB/s) - ‘20MB.zip.4’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:07:24-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.5’

20MB.zip.5 100%[=====================================================================================================>] 20.00M 3.84MB/s in 5.6s

2016-12-21 18:07:30 (3.59 MB/s) - ‘20MB.zip.5’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:07:31-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.6’

20MB.zip.6 100%[=====================================================================================================>] 20.00M 309KB/s in 59s

2016-12-21 18:08:30 (349 KB/s) - ‘20MB.zip.6’ saved [20971520/20971520]

steve@bruckner ~/xxx $ wget http://http-speedtest4.thinkbroadband.com/20MB.zip
--2016-12-21 18:08:34-- http://http-speedtest4.thinkbroadband.com/20MB.zip
Resolving http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)... 80.249.103.8
Connecting to http-speedtest4.thinkbroadband.com (http-speedtest4.thinkbroadband.com)|80.249.103.8|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 20971520 (20M) [application/zip]
Saving to: ‘20MB.zip.7’

20MB.zip.7 100%[=====================================================================================================>] 20.00M 3.85MB/s in 5.6s

2016-12-21 18:08:40 (3.60 MB/s) - ‘20MB.zip.7’ saved [20971520/20971520]

20.00M 3.85MB/s in 5.6s is a good speed

20.00M 309KB/s in 59s is not too good

20.00M 62.0KB/s in 3m 45s is dire

So its nothing to do with browsers or network configuration and the 62.0 KB/s was consistently slow - wobbling between about 50 and 110 - so once the transfer has started it stays pretty slow.

[#13]

thanks Steve, interesting!

Can you try running a live iplayer stream in the background (not on demand, but live!) to keep a constant background traffic going, and leave running for an hour, with maybe a simple script to loop wget

while true 
do
wget http://http-speedtest4.thinkbroadband.com/20MB.zip &>> wgetoutput
wget http://web4host.net/50MB.zip &>> wgetoutput
sleep 180
done

[#14]

Will do - got lots of other things to do this evening.

Forgot to add:

You are currently connected to gateway psb-bng04.

This is located in Southbank Point of Presence.

I'm on a fixed IP address.

Edited to add :

Streaming BBC News live

Wget running - two runs done so far, showing 3.50MB/s 

[#15]

So a few tests in on the loop and I get:

2016-12-21 19:07:04 (333 KB/s) - ‘20MB.zip.11’ saved [20971520/20971520]

62 seconds.

Iplayer stream unaffected