Huge uplink buffer

mofro10112 · Post by **mofro10112** » Tue Aug 28, 2012 8:28 pm

Recently I've been having some issues in online games, such as League of Legends in which I loose control of my character and suffer what appears to be input lag. However, there is no noticeable increase in latencies or framerate drops. In investigating the issue I verified my packet lose at 0% and the relatively good speed of my connection. However, occasionally while running speed tests (speedtest.net) there is a considerably delay before the download begins and when it does the graph appears jagged, as if completely loosing connection occasionally. This occurs maybe 2 or 3 times per 6 tests. I ran Netalyzr to investigate this further and the major concern is that my uplink buffer is 1800ms, could this be the probable cause of my issue and if so what can I do to fix it? Enclosed is my TCP analyzer results and speedtest.

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« SpeedGuide.net TCP Analyzer Results » 
Tested on: 2012.08.28 20:11 
IP address: 60.242.xxx.xx 
Client OS/browser: Windows 7 (Chrome 21.0.1180.83) 
 
TCP options string: 020405ac0103030201010402 
MSS: 1452 
MTU: 1492 
TCP Window: 17424 (multiple of MSS) 
RWIN Scaling: 2 bits (2^2=4) 
Unscaled RWIN : 4356 
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208 
BDP limit (200ms): 697kbps (87KBytes/s)
BDP limit (500ms): 279kbps (35KBytes/s) 
MTU Discovery: ON 
TTL: 110 
Timestamps: OFF 
SACKs: ON 
IP ToS: 00000000 (0)

«

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 SpeedGuide.net Speed Test Results »
370 kbps down (~0.37 Mbps, 45 KB/s)↓ 
277 kbps up (~0.28 Mbps, 34 KB/s)↑ 
1024 KB downloaded in 22.66 seconds 
100 KB uploaded in 2.954 seconds 
Tested on: 2012.08.28 20:27 EDT 
Tested from: biznetnetworks.com 
Test Link: http://www.speedguide.net/speedtest/results.php?test=3738983 
Provider: static.tpgi.com.au

Regards,
Morgan

Post by **Philip** » Tue Aug 28, 2012 9:46 pm

Netalyzr "excessive buffering" are generaly your ISP's issues, and there is little you can do to change that.

I'd try to run some traceroutes and look for lag spikes at a particular hop near you, that may give you a bit better picture of where it occurs.

mofro10112 · Post by **mofro10112** » Tue Aug 28, 2012 10:43 pm

Firstly, thanks for your prompt response.
So after running a few traceroutes with exception of a few time outs in hops 1-6 the main spike seems to appear from hop 7 onwards, what exactly does this indicate?

Once again, Regards
Morgan

Post by **Philip** » Tue Aug 28, 2012 11:03 pm

The first hops are your ISP's routers (you can usually tell from the hostnames), and from there on it's on to their backbones to your destination. Some lost packets and lag spikes on the same hop can indicate an overloaded node, if it is near you (first few hops) you can present copies of those traces to your ISP as evidence of issues.

mofro10112 · Post by **mofro10112** » Tue Aug 28, 2012 11:09 pm

Yeah, I saw recognized my the hops from my ISP's router, strange thing is when tested with pingtest etc, my lost packets are 0%. They seem also to be the hops further from my location perhaps overseas? Regardless, do you think I should contact my ISP?

Post by **Philip** » Tue Aug 28, 2012 11:15 pm

They will only do something if you present them with evidence, such as packet loss and lag spikes at a particular hop controlled by them. It may vary with time, so you'd have to investigate at the time you're having the issues. You can always ask them about the huge uplink buffer, just not sure you'll get far unless you're persistent.

mofro10112 · Post by **mofro10112** » Tue Aug 28, 2012 11:23 pm

Okay, thanks for all your help and prompt reply time; really appreciate it.